fix(share): terminal caret position; remove GUI Inventory tab (use CLI)

- The shared terminal caret now sits at the real cursor (row and column) instead
  of the start of the line.
- Remove the GUI Inventory tab; `rigdoctor inventory` (CLI) covers it. Inventory is
  still collected for the relay guest view (so a remote helper sees the host's
  hardware) and via launch elevation. Deletes gui/inventory_page.py.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -0,0 +1,92 @@
+name: release
+run-name: Release on push to main
+
+# Builds a wheel + sdist and publishes a Gitea release v<version> on every push to
+# main. The version comes from pyproject.toml (kept in lockstep with __version__, D19);
+# if a release for that tag already exists, the job is a no-op — so bump the version
+# (and CHANGELOG) to cut a new release.
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Build wheel + sdist
+        run: |
+          python -m pip install --upgrade build
+          python -m build
+
+      - name: Build self-extracting installer (.run)
+        run: python packaging/make_run.py
+
+      - name: Read version
+        id: ver
+        run: |
+          V=$(python -c "import tomllib; print(tomllib.load(open('pyproject.toml','rb'))['project']['version'])")
+          echo "version=$V" >> "$GITHUB_OUTPUT"
+
+      - name: Build release notes
+        run: |
+          python - <<'PY'
+          import json
+          version = "${{ steps.ver.outputs.version }}"
+          tag = f"v{version}"
+          out, capturing = [], False
+          try:
+              for line in open("CHANGELOG.md", encoding="utf-8").read().splitlines():
+                  if line.startswith("## "):
+                      if capturing:
+                          break
+                      capturing = line.startswith(f"## [{version}]")
+                      continue
+                  if capturing:
+                      out.append(line)
+          except OSError:
+              pass
+          body = "\n".join(out).strip() or f"Release {tag}."
+          payload = {"tag_name": tag, "target_commitish": "${{ github.sha }}", "name": tag, "body": body}
+          open("/tmp/release.json", "w", encoding="utf-8").write(json.dumps(payload))
+          print(f"release notes: {len(body)} chars")
+          PY
+
+      - name: Publish Gitea release
+        env:
+          TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          set -euo pipefail
+          API="${{ github.server_url }}/api/v1/repos/${{ github.repository }}"
+          TAG="v${{ steps.ver.outputs.version }}"
+
+          code=$(curl -sS -o /tmp/existing.json -w '%{http_code}' \
+            -H "Authorization: token ${TOKEN}" "${API}/releases/tags/${TAG}")
+          if [ "$code" = "200" ]; then
+            echo "Release ${TAG} already exists — nothing to do."
+            exit 0
+          fi
+
+          echo "Creating release ${TAG}…"
+          rid=$(curl -sS -X POST \
+            -H "Authorization: token ${TOKEN}" \
+            -H "Content-Type: application/json" \
+            -d @/tmp/release.json \
+            "${API}/releases" | python -c "import sys, json; print(json.load(sys.stdin)['id'])")
+
+          for f in dist/*; do
+            echo "Uploading $(basename "$f")…"
+            curl -sS -X POST \
+              -H "Authorization: token ${TOKEN}" \
+              -F "attachment=@${f}" \
+              "${API}/releases/${rid}/assets?name=$(basename "$f")" >/dev/null
+          done
+          echo "Published ${TAG}."

CHANGELOG.md

@@ -0,0 +1,209 @@
+# Changelog
+
+All notable changes to RigDoctor are recorded here. Format follows
+[Keep a Changelog](https://keepachangelog.com/); versioning is SemVer-style
+(`MAJOR.MINOR.PATCH`, pre-1.0). `__version__` and `pyproject.toml` must match the git
+release tag (so the auto-updater, D18, can compare versions).
+
+## [0.7.2] - 2026-05-21
+### Changed
+- Removed the GUI **Inventory** tab — use the CLI `rigdoctor inventory` instead. (Inventory is
+  still collected for the relay guest view, so a remote helper still sees the host's hardware.)
+### Fixed
+- Shared terminal caret now sits at the real cursor position (row **and** column) instead of
+  the start of the line.
+
+## [0.7.1] - 2026-05-21
+### Fixed
+- Shared terminal: a guest who joined **after** the host enabled the terminal stayed read-only.
+  The host now re-sends the terminal state when a guest joins, so the terminal is available.
+- Inventory page no longer jumps back to the top when it refreshes (e.g. when elevated data
+  arrives) — scroll position is preserved and unchanged data isn't re-rendered.
+- Shared terminal now follows the cursor to the bottom as output arrives (e.g. `ls -la`),
+  instead of staying scrolled up.
+
+## [0.7.0] - 2026-05-21
+### Added
+- **Shared terminal (M12, Tier 3)**: when the host enables it, the session shares a real **PTY**
+  shell — the guest gets an interactive terminal (vim, top, tab-completion, Ctrl-C) running on
+  the host as the host's user. The host **reads along** live and can type too, e.g. a `sudo`
+  password — which stays local and is never sent to the guest. Off by default, host-consented.
+  The guest also pulls the host's inventory on join.
+### Fixed
+- **Input contrast**: all form controls (text fields, spin boxes, combo boxes, terminals) now
+  use the dark theme with readable text (Fusion defaulted them to light-on-light).
+
+## [0.6.0] - 2026-05-21
+### Added
+- **Session sharing over the relay (M12)**: a **Share** tab — *Start shared session* (host)
+  hands you a short code and streams a read-only live view; *Enter share code* (guest) joins
+  someone else's session and views their sensors/health/inventory. Both connect outbound over
+  WebSocket to the relay (`relay_url`, default `wss://rigdoctor.jesseyvanofferen.com`), gated
+  by your Gitea access token — no port forwarding. Read-only.
+
+## [0.5.0] - 2026-05-21
+### Added
+- **Session sharing (M12, Tier 2)**: `rigdoctor share serve` starts a **read-only** live view
+  (sensors auto-refresh + health report + inventory) over a local HTTP server, gated by a
+  random share token. Bind to localhost for local testing, or to all interfaces behind a
+  user-chosen tunnel (Tailscale/cloudflared/SSH) for remote help. No actions, no terminal.
+  (Tier 1 export and Tier 3 gated terminal still to come — D16.)
+
+## [0.4.1] - 2026-05-21
+### Fixed
+- Checkbox contrast: a checked checkbox is now a clear accent-filled box with a checkmark
+  (was hard to tell checked from unchecked on the dark theme).
+
+## [0.4.0] - 2026-05-21
+### Added
+- **Alerts (M8)**: desktop notifications (via `notify-send`) for **overheat** (GPU/CPU past a
+  threshold), **GPU-lost** (nvidia-smi timeout), and a **new version available** (fired once
+  per version). Edge-triggered with a cooldown so it doesn't spam. Degrades gracefully if
+  `notify-send` isn't installed.
+- **Notifications page**: configure alerts (enable/disable, GPU/CPU temperature thresholds)
+  with a "Send test" button; changes apply live and persist to `config.toml`.
+- **App icon**: ships a RigDoctor icon and shows it in the dock/launcher. The GUI
+  **self-registers** the icon + `.desktop` on launch (and sets the Wayland app-id), so a
+  self-update + relaunch picks it up — no need to re-run the installer.
+
+## [0.3.2] - 2026-05-21
+### Changed
+- Replaced the per-page "Run with admin" buttons with a **single password prompt at launch**
+  (`pkexec`): the GUI collects root-only data (SMART + dmidecode board/BIOS/RAM) once and
+  caches it for the session, so Health and Inventory always show the full picture. Falls back
+  to non-root if cancelled/unavailable; disable via `elevate_on_launch = false`.
+
+## [0.3.1] - 2026-05-21
+### Fixed
+- Changelog/release notes now **render Markdown** instead of showing raw `#`/`**` markup —
+  the in-app changelog uses `QTextEdit.setMarkdown()` and the update prompt renders notes as
+  rich text (closes #1).
+
+## [0.3.0] - 2026-05-21
+### Added
+- **System inventory (M5)**: CPU, GPU (model/driver/VBIOS/VRAM/PCIe), motherboard/BIOS, RAM
+  (total + modules), storage, kernel, and display server. CLI `rigdoctor inventory`
+  (`--json` / `--markdown` / `--output`) and a GUI **Inventory** tab with Copy-as-Markdown,
+  Save, and "Run with admin" (for `dmidecode` board/BIOS/RAM details). Fills the last GUI tab.
+
+## [0.2.0] - 2026-05-21
+### Added
+- **"Check for updates" button** in the sidebar — force an immediate version check instead of
+  waiting for the 30-minute poll.
+
+## [0.1.1] - 2026-05-21
+### Fixed
+- Dialogs (the update prompt and changelog) were light-on-light and unreadable — they now use
+  the dark theme with readable text.
+
+## [0.1.0] - 2026-05-21
+_First milestone release — a complete, installable, self-updating RigDoctor: live monitoring,
+crash capture + health report, desktop GUI, user-local install/uninstall, and updates._
+### Added
+- **In-app uninstaller**: "Uninstall RigDoctor" button on the Setup page (and
+  `rigdoctor uninstall [--purge]`) — removes the venv, launchers, and desktop entry, with an
+  option to also wipe settings/token/logs. Runs detached so it can delete its own venv.
+- **In-app changelog**: a "Changelog" link in the sidebar opens the release history (tags +
+  notes) fetched from the update server.
+
+## [0.0.10] - 2026-05-21
+### Added
+- **"Restart now" button** after a successful in-app update — relaunches RigDoctor for you
+  instead of asking you to restart manually.
+- **Real release notes**: CI now sets each Gitea release's body from the matching CHANGELOG
+  section (instead of "Automated release for…"), and the updater shows **"What's new"** — a
+  notes dialog before applying (GUI) and in `rigdoctor update` (CLI).
+### Changed
+- Setup page / `rigdoctor install`: dropped internal module references (M4, M5, …) from the
+  component descriptions — end users don't need them.
+- Adopting **Conventional Commits** + **git-cliff** (`cliff.toml`, `packaging/changelog.sh`)
+  to generate CHANGELOG entries from commit history going forward (D20).
+### Fixed
+- The self-extracting **`.run` installer** is now built **without makeself** (a pure-Python
+  self-extractor, `packaging/make_run.py`), so it reliably attaches to every release — it was
+  silently skipped before because the CI runner couldn't install makeself.
+
+## [0.0.8] - 2026-05-21
+### Added
+- **Periodic update checks**: the GUI now re-checks for new releases while running (every
+  `update_check_minutes`, default 30; 0 disables), so a newly published version is detected
+  without restarting. After applying an update, re-checks stop until restart.
+- **"Run with admin" on the Health page**: runs all checks (including root-only SMART) via
+  `pkexec rigdoctor report --json`, so the full report — not just "SMART needs root" — is
+  available from the UI.
+
+## [0.0.7] - 2026-05-21
+### Added
+- **User-local installer** `install.sh` (no root): creates a private venv, links
+  `rigdoctor`/`rigdoctor-gui` into `~/.local/bin`, and adds a desktop entry. Re-run to
+  upgrade; `--uninstall` to remove.
+- **Self-extracting `.run` installer** via `packaging/make-run.sh` (makeself) — one
+  download-and-run executable bundling the wheel + `install.sh`; built and attached to each
+  release by CI.
+- **Self-update apply (M13)**: `rigdoctor update` now installs the newer version via
+  authenticated pip (`rigdoctor[gui] @ git+https://oauth2:<token>@…@<tag>`); the GUI sidebar
+  "Update to v…" button applies it and prompts to restart. Token is scrubbed from output.
+
+## [0.0.6] - 2026-05-21
+### Added
+- **Token-gated updates (M13)**: store a Gitea Personal Access Token, **encrypted in the OS
+  keyring** (Secret Service / GNOME Keyring via `secret-tool`) with a 0600-file fallback.
+  `rigdoctor login` / `logout` / `update [--check]`; GUI **Setup → Update access** panel
+  (token field, "Get a token", backend status) and sidebar states (connect / up-to-date /
+  "Update to v…" / access denied). Updates are gated to accounts on the Gitea server (D18).
+- `libsecret-tools` added to the installer catalog (enables encrypted token storage).
+### Changed
+- D18 update mechanism revised from anonymous public HTTP to **authenticated HTTP (token)** —
+  the Gitea instance requires sign-in for all anonymous access.
+
+## [0.0.5] - 2026-05-21
+### Added
+- **M9 installer (first cut)**: detects distro / package manager / GPU; a catalog of optional
+  components (smartmontools, lm-sensors, dmidecode, pciutils, libnotify) with what each
+  enables; `rigdoctor install [--check] [-y]` installs missing apt packages via pkexec/sudo
+  with consent; GUI **Setup** tab with one-click install. Fixes the "smartmontools missing"
+  gap in the health report.
+- **Update check (M13, check half)**: on GUI launch the sidebar checks the Gitea releases API
+  and shows "up-to-date", an "Update to v…" button if a newer release exists, or "update check
+  unavailable" if the API can't be reached anonymously.
+
+## [0.0.4] - 2026-05-21
+### Added
+- **M4 health report**: scans kernel logs (NVIDIA Xid incl. 79 "fell off the bus", kernel
+  panic, OOM, MCE, PCIe AER, thermal, amdgpu reset), SMART health, NVIDIA driver/library
+  mismatch, journald persistence, and live temps → prioritized plain-language findings with
+  suggested fixes (read-only, D9).
+- CLI `rigdoctor report` (text + `--json`).
+- GUI **Health** tab: runs checks in the background; findings shown as severity-colored cards.
+- Tests for the journal scanner.
+
+## [0.0.3] - 2026-05-21
+### Added
+- Show the app version (`v<version>`) in the GUI sidebar.
+
+## [0.0.2] - 2026-05-21
+### Added
+- **M3 crash-capture logger**: crash-safe JSONL (`fsync` per sample), size-based rotation,
+  GPU-lost/recovered event markers, atomic status file; `rigdoctor record run|start|stop|
+  status|report` (foreground `run` is the systemd-ready entrypoint).
+- **GUI Recording/Logs page** (M10): start/stop/interval controls, live status, and the
+  post-crash report — driving the same recorder via shared `core.reccontrol`.
+- Shared render helpers (`format_raw`, `format_headline`, `render_summary`) used by CLI + GUI.
+- Tests for the crash log (writer, rotation, reader, summary, recorder).
+- **Gitea Actions release workflow** (`.gitea/workflows/release.yml`): on push to `main`,
+  builds wheel + sdist and publishes a Gitea release `v<version>` with the artifacts.
+### Changed
+- **GUI-first** emphasis (D17): docs reframed; the CLI keeps full parity for headless/SSH.
+- CPU core temperatures ordered (package, then core 0, 4, 8, …) at the source — fixes the
+  CLI ordering too.
+- Distribution revised (D8): **user-local self-updating install** is primary, `.deb` optional.
+### Planned (docs only)
+- M12 session sharing / remote assist (D16); M13 no-root auto-update from the public repo
+  (D18); versioning/changelog convention (D19).
+
+## [0.0.1] - 2026-05-21
+### Added
+- Initial release: planning docs and decisions (D1–D15); **M1 sensor core** (NVIDIA GPU via
+  nvidia-smi, CPU via hwmon, memory + DDR5 SPD temps, NVMe); CLI (`snapshot`, `monitor`,
+  `sources`); and the **M10 desktop GUI** — dark dashboard with circular gauges and
+  collapsible, temperature-colored cards.

README.md

@@ -2,9 +2,10 @@
 
 A **modular diagnostics, monitoring, and health-check toolkit for Linux gamers.**
 
-> **Status:** 🟢 Phase 1 (MVP) in progress. Foundational decisions are settled and the
-> **sensor core (M1)** works — `snapshot` / `monitor` read NVIDIA GPU, CPU, memory, and
-> NVMe live. Crash logger (M3) and health report (M4) are next. See `docs/ROADMAP.md`.
+> **Status:** 🟢 Phase 1 (MVP) complete. The **sensor core (M1)**, **crash-capture logger
+> (M3)**, and **health report (M4)** all work — live `snapshot`/`monitor`, crash-safe `record`
+> with a post-crash report, and `report` to scan logs/SMART/driver for likely causes. A
+> desktop GUI (M10) ties them together (dashboard, recording, health). See `docs/ROADMAP.md`.
 
 ## Why this exists
 
@@ -25,13 +26,14 @@ See `docs/SPEC.md` §1.
 
 ## How you run it
 
-Three front-ends over one shared engine — pick what fits:
-- **CLI / headless** — full functionality from the terminal, works over SSH.
-- **Desktop GUI** — graphical dashboard, log browser, and health-report viewer.
-- **Tray applet** — a small applet in the top menu bar with quick actions (e.g. start
-  recording) and at-a-glance status.
+RigDoctor is **GUI-first** — the desktop app is the primary way in — but every feature is
+also available headless:
+- **Desktop GUI** — graphical dashboard, recording controls, log browser, reports. The
+  default interface for most users.
+- **Tray applet** — a small top-menu-bar applet with quick actions and at-a-glance status.
+- **CLI** — full functionality from the terminal; works over SSH and in scripts.
 
-The GUI and tray are optional modules; a headless install loses no diagnostic capability.
+The GUI/tray are optional modules; a headless (CLI-only) install loses no capability.
 
 ## Key decisions (settled)
 
@@ -42,7 +44,7 @@ The GUI and tray are optional modules; a headless install loses no diagnostic ca
 | Primary distro | **Ubuntu** (Debian via apt); others best-effort later |
 | Primary GPU | **NVIDIA** first; AMD, then Intel later |
 | MVP | **Sensor core + crash logger + health report** (NVIDIA-only, CLI-first) |
-| Distribution | **`.deb`** + interactive module installer |
+| Distribution | **User-local install** (self-updating from the public repo, no root); **`.deb`** optional |
 | Scope of action | **Read-only + suggestions** (no auto-apply yet) |
 | Stress tests | **Out of scope** |
 
@@ -61,6 +63,21 @@ Full rationale and the still-open questions are in `docs/DECISIONS.md`.
 | `installer/` | Installer / `.deb` packaging (empty until Phase 4) |
 | `tests/` | Tests (stdlib `unittest`) |
 
+## Install (user-local, no root)
+
+RigDoctor installs into a private venv under `~/.local` — no root, self-updating:
+
+```bash
+./install.sh                 # from a source checkout or the self-extracting .run
+./install.sh --ref v0.0.6    # install a specific released tag (needs a token)
+./install.sh --uninstall     # remove it
+```
+
+This adds `rigdoctor` / `rigdoctor-gui` to `~/.local/bin` and a desktop entry. Each release
+also ships a one-file **`.run`** installer (download, `chmod +x`, run). Updates are gated to
+accounts on the Git server (a Personal Access Token); save one via the GUI **Setup → Update
+access** panel or `rigdoctor login`, then `rigdoctor update` (or the sidebar button).
+
 ## Run it (dev)
 
 Stdlib-only, no install needed (target is Python ≥ 3.11; tested on 3.14):
@@ -73,6 +90,23 @@ PYTHONPATH=src python3 -m rigdoctor sources       # list detected sensor sources
 PYTHONPATH=src python3 -m unittest discover -s tests
 ```
 
+### Crash-capture logger (M3)
+
+A crash-safe background logger (JSONL, `fsync` per sample, bounded by rotation) for catching
+the state right before a freeze:
+
+```bash
+rigdoctor record start          # start logging in the background
+rigdoctor record status         # is it running? latest readings, sample count
+rigdoctor record stop           # stop it
+rigdoctor record report         # post-crash summary: peaks, events, last samples
+rigdoctor record run            # run in the foreground (the systemd-ready entrypoint)
+```
+
+Logs live in `~/.local/share/rigdoctor/logs/`. It detects GPU "lost"/hang (nvidia-smi query
+timeout) and writes an event marker. Trigger modes (always-on / game-launch) and the
+`systemd --user` service arrive in Phase 4.
+
 ### Desktop GUI (M10)
 
 The GUI uses PySide6 (Qt) — the only part of RigDoctor that needs a non-stdlib dep:
@@ -85,7 +119,8 @@ rigdoctor gui             # or: rigdoctor-gui
 It opens a dark-themed window with sidebar navigation and a **live dashboard** over the
 same sensor core — circular gauges for the headline metrics plus collapsible per-subsystem
 cards (GPU/CPU/memory/storage) with temperature-colored values (icey-blue → green → red).
-The Logs / Health / Inventory sections are placeholders until M3–M5 land.
+The **Logs** and **Health** sections are full pages (recording controls + post-crash report;
+and the kernel-log / SMART / driver scan). **Inventory** is a placeholder until M5 lands.
 
 Without the GUI extra, `pip install -e .` gives just the stdlib-only CLI.
 

cliff.toml

@@ -0,0 +1,42 @@
+# git-cliff configuration — generate CHANGELOG.md from Conventional Commits (D20).
+# Run via packaging/changelog.sh.
+
+[changelog]
+header = """
+# Changelog
+
+All notable changes to RigDoctor are recorded here. Format follows
+[Keep a Changelog](https://keepachangelog.com/); versioning is SemVer-style
+(`MAJOR.MINOR.PATCH`, pre-1.0). `__version__` and `pyproject.toml` must match the git
+release tag (so the auto-updater, D18, can compare versions).
+"""
+body = """
+{% for group, commits in commits | group_by(attribute="group") %}
+## {{ group | upper_first }}
+{% for commit in commits %}\
+- {{ commit.message | upper_first }}\
+{% endfor %}
+{% endfor %}
+"""
+trim = true
+
+[git]
+conventional_commits = true
+filter_unconventional = false
+commit_parsers = [
+    { message = "^feat", group = "Added" },
+    { message = "^fix", group = "Fixed" },
+    { message = "^docs", group = "Documentation" },
+    { message = "^perf", group = "Performance" },
+    { message = "^refactor", group = "Changed" },
+    { message = "^chore\\(release\\)", skip = true },
+    { message = "^chore|^build|^ci|^style|^test", group = "Internal" },
+    { message = ".*", group = "Other" },
+]
+tag_pattern = "v[0-9]*"
+sort_commits = "oldest"
+
+[bump]
+# Pre-1.0 rules (D21): feat -> minor, fix -> patch, breaking -> minor (not major).
+features_always_bump_minor = true
+breaking_always_bump_major = false

docs/ARCHITECTURE.md

@@ -129,8 +129,9 @@ as a single callable so all three front-ends share one implementation.
    optionally **enable** the `systemd --user` logger service and choose its trigger mode (D6).
 5. **Verify** each installed module's `probe()` and print a readiness summary.
 
-Module list/bundling is final (D14). Packaging is `.deb`-first (D8); the wizard layers
-module selection on top of the package.
+Module list/bundling is final (D14). Packaging: a **user-local install is primary**
+(self-updating from the public repo, no root — D8/D18), with an **optional `.deb`** system
+package; the wizard layers module selection on top of either.
 
 ## 9. GPU vendor abstraction
 | Capability | NVIDIA (first) | AMD (later) | Intel (later) |

docs/DECISIONS.md

@@ -1,8 +1,9 @@
 # RigDoctor — Decisions & Open Questions
 
 Format: each item is **OPEN** (needs a call) or **DECIDED** (with date + rationale).
-Decisions D1–D15 were all settled on 2026-05-21; the original open questions are kept below
-with their resolutions so the reasoning is traceable. No tracked decisions are currently open.
+Decisions D1–D19 are settled (D1–D15 on 2026-05-21); the original open questions are kept
+below with their resolutions so the reasoning is traceable. No tracked decisions are
+currently open.
 
 ## Decided
 
@@ -34,9 +35,10 @@ AMD and Intel come later behind the vendor abstraction; nothing should hard-code
 way that blocks them.
 
 ### D5 — MVP scope — *DECIDED 2026-05-21*
-**M1 + M3 + M4 (the *Essential* bundle), NVIDIA-only**, CLI-first. This is the first build
-target — it captures the seed crash and explains the logs before any installer, GUI, tray,
-or multi-vendor work.
+**M1 + M3 + M4 (the *Essential* bundle), NVIDIA-only.** This was the first build target — it
+captures the seed crash and explains the logs before any installer, multi-vendor, etc. work.
+*(The MVP was built CLI-first; per D17 the GUI is now the primary interface going forward —
+the CLI keeps full parity.)*
 
 ### D6 — Crash-logger trigger model — *DECIDED 2026-05-21*
 **Let the user choose.** All three modes are supported and selectable (installer + config):
@@ -50,10 +52,13 @@ or multi-vendor work.
 generators. Users who want to reproduce load can run existing tools (gpu-burn, vkmark,
 stress-ng) themselves alongside the logger.
 
-### D8 — Distribution / packaging — *DECIDED 2026-05-21*
-**`.deb` package** as the primary distribution channel (matches the Ubuntu-first focus). The
-`.deb` declares dependencies per module group; the interactive installer (M9) handles module
-selection on top. AUR / Flatpak / COPR are possible later, not now.
+### D8 — Distribution / packaging — *DECIDED 2026-05-21; revised 2026-05-21 (see D18)*
+**Primary: a user-local install** (pipx/venv or a versioned bundle under `~/.local`, owned by
+the user) so the app can **self-update from the public Gitea releases with no root** (D18). A
+**`.deb` remains an optional** system-install channel for users who prefer it (updated via
+apt). *Why the revision:* the repo is public and we want frictionless, GUI-first self-updates,
+which a root-owned system package can't apply silently. The interactive installer (M9) layers
+module selection on top of either channel. AUR / Flatpak / COPR still later, if warranted.
 
 ### D9 — Scope of action (read-only vs apply-fixes) — *DECIDED 2026-05-21*
 **Read-only + suggestions.** RigDoctor diagnoses, monitors, and **suggests** actions in
@@ -118,10 +123,111 @@ build or maintain mappings for other package managers. A thin seam is left in th
 another package manager *could* be added later, but multi-distro support is **not** a planned
 deliverable. Revisit only if Ubuntu-only proves too narrow.
 
+### D16 — Session sharing / remote assist (M12) — *DECIDED 2026-05-21*
+Build a **session-sharing / remote-assist** capability (new module **M12**) so a user (A)
+can let a helper (B) inspect their machine. **Full ladder, built in order:**
+1. **Diagnostic bundle export** — `share export` packages inventory (M5) + recent capture
+   log (M3) + a report into one file A sends to B; B opens it in RigDoctor. One-way, no live
+   connection. Safest; build first.
+2. **Live read-only view** — a small local server serving the live dashboard + logs
+   read-only, reached over a **user-chosen tunnel** (Tailscale / cloudflared / SSH reverse
+   tunnel — *no RigDoctor-hosted relay*, to keep the no-telemetry promise). Token-gated,
+   short TTL, A approves and can kill instantly. No terminal.
+3. **Gated interactive terminal** — wrap an existing trusted tool (`tmate`/`sshx`) rather
+   than rolling our own; **read-only link by default**, read-write requires explicit
+   per-session consent. This is a deliberate, consent-gated exception to the read-only stance
+   (D9) — it's full machine access and must be treated as such.
+
+*Cross-cutting principles:* explicit per-session consent; ephemeral, revocable tokens;
+clear permission escalation (view ≠ shell); no mandatory central relay; session audit log.
+*Note:* this adds M12 on top of the "final" list from D14; the catalog is updated accordingly.
+
+### D17 — GUI-first interface emphasis — *DECIDED 2026-05-21*
+The **desktop GUI (M10) is the primary, default interface** for end users — it's the more
+user-friendly way in, and **every capability** (recording, reports, status, …) must be
+reachable from it. This **supersedes the earlier "CLI-first / terminal-first" framing**
+(updates D5 and the SPEC wording).
+- *The CLI is not removed:* it keeps **full functionality** for headless / SSH / server /
+  scripting use, and it's the engine the background daemon runs on.
+- *No change to layering (D2):* the core, CLI, and daemon stay **stdlib-only** and must run
+  without Qt. "GUI-first" is about emphasis and front-end parity, not dropping headless support.
+
+### D18 — Auto-update (M13) — *PLANNED 2026-05-21; mechanism revised 2026-05-21*
+RigDoctor should **check for a newer version on launch and self-update** (new module **M13**).
+**Mechanism (revised): user-local, no-root self-update over authenticated HTTP (token).**
+*Why revised:* the Gitea instance requires sign-in for **all** anonymous access (repo page,
+releases feed, raw, API all 303/403 anonymously), so the original "public HTTP" plan can't
+work. Updates are therefore **gated to people with an account on the Gitea server**, which is
+desirable — access control is delegated to Gitea.
+- *Auth:* each user creates a **Personal Access Token** (scope `read:repository`); RigDoctor
+  stores it at `~/.config/rigdoctor/token` (mode 0600) or reads `RIGDOCTOR_TOKEN`. Requests
+  send `Authorization: token <PAT>`. Finer access = repo visibility/collaborators on Gitea.
+- *Check:* `GET /api/v1/repos/jessey/rigdoctor/releases/latest` with the token; compare tags.
+- *Apply:* `pip install --upgrade "git+https://oauth2:<token>@…/rigdoctor.git@<tag>"` into the
+  user-local venv, then restart (incl. the daemon). No root.
+- *States surfaced:* no-token → "connect to update server"; auth error → "access denied";
+  newer → "Update to v…"; else "up-to-date".
+- *Original (now-superseded) plan was anonymous public HTTP:*
+- *Install model (D8 revised):* primary install is **user-local** (`~/.local`), so the running
+  app can replace its own files and update with **no apt, no root, no password prompt**.
+- *Check:* on launch, query the **public Gitea releases API**
+  (`/api/v1/repos/jessey/rigdoctor/releases/latest`) over HTTPS; compare to the running version.
+- *Apply:* download the new release bundle, **verify checksum/signature**, stage it
+  (e.g. `~/.local/share/rigdoctor/versions/x.y.z`), swap a symlink atomically, then restart
+  (including the `systemd --user` daemon).
+- *GUI-first (D17):* a non-intrusive "update available" prompt + one-click apply; `rigdoctor
+  update` in the CLI.
+- *Security:* HTTPS only; verify checksum/signature before swapping; never run unverified code.
+- *Privacy (no telemetry):* version-check only — no tracking; auto-check is opt-out-able.
+- *`.deb` users:* the optional `.deb` channel updates via apt instead; auto-update targets the
+  user-local install.
+- *Caveat (to confirm before building):* the Gitea instance currently **requires sign-in for
+  API calls** (`"Only signed in user is allowed to call APIs."`), so anonymous version checks
+  need the instance/repo set to allow anonymous access — or a separate public version endpoint
+  (e.g. a static file or a mirror).
+
+### D19 — Versioning & changelog — *DECIDED 2026-05-21*
+**Track a version number on every change.** SemVer-style `MAJOR.MINOR.PATCH` (pre-1.0: bump
+PATCH for ordinary changes, MINOR for larger milestones). `__version__`
+(`rigdoctor/__init__.py`) and `pyproject.toml` are the single source of truth and **must match
+the git release tag** so the auto-updater (D18) can compare versions. Every change updates
+`CHANGELOG.md` — now generated from **Conventional Commits** via git-cliff (see D20).
+*Milestone policy (pre-1.0):* **0.0.x** = early development; **0.1.0** = first complete,
+installable, self-updating release (reached 2026-05-21); **0.x.0** = each later milestone
+(AMD/Intel, unattended logger auto-start, session sharing…); **1.0.0** = broadly stable
+(multi-vendor/distro, no major caveats). PATCH (`0.x.PATCH`) for fixes/small changes. *Note:* an early placeholder `0.1.0` was corrected to
+follow the released **0.0.x** line — first release was **V0.0.1**; current is **0.0.2**.
+
+### D20 — Automated changelog & release notes — *DECIDED 2026-05-21*
+**Release notes are generated from our changes, surfaced in the auto-updater.**
+- *Release body:* CI sets each Gitea release's `body` from the matching `CHANGELOG.md`
+  section (was a hardcoded "Automated release for…"). The updater fetches the release `body`
+  and shows **"What's new"** — a dialog before applying (GUI) and in `rigdoctor update` (CLI).
+- *Generation:* adopt **Conventional Commits** (`feat:`/`fix:`/`docs:`/`chore:` …) and
+  **git-cliff** (`cliff.toml`, `packaging/changelog.sh`) to generate `CHANGELOG.md` from
+  commit history. Refines D19's "hand-write CHANGELOG" to "generate it from conventional
+  commits"; `__version__`/`pyproject.toml`/tag still the source of truth for the version.
+- *CI does not auto-commit the changelog* (avoids push loops) — it's regenerated by the dev
+  via the script when cutting a version; CI only reads the section for the release body.
+
+### D21 — Versioning rules & automation — *DECIDED 2026-05-21*
+The next version is **determined by the Conventional Commit types** since the last release
+(D20), so it can be auto-computed instead of guessed:
+- `fix:` / `perf:` → bump **PATCH**.
+- `feat:` → bump **MINOR** (pre-1.0: `0.MINOR.0`).
+- breaking (`feat!:` / `BREAKING CHANGE:`) → pre-1.0: bump **MINOR** (not major); post-1.0: MAJOR.
+- `docs:` / `chore:` / `refactor:` / `ci:` / `test:` / `style:` alone → **PATCH** (no feature release).
+- Milestone overrides by hand are allowed (e.g., jumping to `1.0.0`); see the milestone policy in D19.
+
+*Automation:* `git-cliff --bumped-version` computes the next version from history;
+`packaging/bump.sh` writes it into `__init__.py` + `pyproject.toml`. Rules live in
+`cliff.toml [bump]` (pre-1.0: `breaking_always_bump_major = false`).
+
 ## Open
 
-None currently — all tracked decisions (D1–D15) are resolved. New questions will be added
+None currently — all tracked decisions (D1–D21) are resolved. New questions will be added
 here as they arise. Remaining detail to flesh out during build: the tray's supporting-action
-set (D13 proposed list) and per-module apt package names (filled in as modules land).
+set (D13), per-module apt package names, M12's tunnel/token specifics, and M13's
+update mechanism (APT repo vs. self-installed `.deb`).
 </content>
 </invoke>

docs/MODULES.md

@@ -2,22 +2,24 @@
 
 Status: ⬜ not started · 🟦 designing · 🟨 in progress · ✅ done
 
-> Final module set (D14). **M7 (stress/repro) was dropped (D7).** M10/M11 are the GUI and
-> tray modules (D10/D11). GPU scope reads "all (NVIDIA first)" — NVIDIA is implemented first,
-> others via the vendor abstraction (D4).
+> Module set per D14, plus **M12 (session sharing, D16)** and **M13 (auto-update, D18)**.
+> **M7 (stress/repro) was dropped (D7).** M10/M11 are the GUI and tray modules (D10/D11).
+> GPU scope reads "all (NVIDIA first)" — NVIDIA first, others via the vendor abstraction (D4).
 
 | ID | Module | Bundle | Key deps | GPU scope | Priority | Status |
 |----|--------|--------|----------|-----------|----------|--------|
 | M1 | Sensor core | Essential | none (nvidia-smi, sysfs) | all (NVIDIA first) | P0 | ⬜ |
-| M3 | Crash-capture logger | Essential | none (opt: smartmontools) | all (NVIDIA first) | P0 | ⬜ |
-| M4 | Health report (log scan) | Essential | none (opt: smartmontools) | all (NVIDIA first) | P0 | ⬜ |
+| M3 | Crash-capture logger | Essential | none (opt: smartmontools) | all (NVIDIA first) | P0 | 🟨 |
+| M4 | Health report (log scan) | Essential | none (opt: smartmontools) | all (NVIDIA first) | P0 | 🟨 |
 | M2 | Live monitor (TUI) | Monitoring | none (stdlib curses) | all | P1 | ⬜ |
-| M8 | Alerting | Monitoring | libnotify (opt) | all | P2 | ⬜ |
-| M5 | System inventory | Diagnostics | none (opt: lm-sensors, dmidecode) | all | P1 | ⬜ |
+| M8 | Alerting | Monitoring | libnotify (opt) | all | P2 | 🟨 |
+| M5 | System inventory | Diagnostics | none (opt: lm-sensors, dmidecode) | all | P1 | 🟨 |
 | M6 | Gaming env checks | Diagnostics | none | all | P2 | ⬜ |
 | M10 | Desktop GUI | Desktop UI | **python3-pyside6** | all | P2 | 🟨 |
 | M11 | Tray / menu-bar applet | Desktop UI | **python3-pyside6** (+ AppIndicator on GNOME) | all | P2 | ⬜ |
-| M9 | Installer | (meta) | none | all | P1 | ⬜ |
+| M9 | Installer | (meta) | none | all | P1 | 🟨 |
+| M12 | Session sharing / remote assist | Sharing | none (Tier 3: tmate/sshx) | all | P3 | 🟨 |
+| M13 | Auto-update | (core) | none (stdlib; user-local file swap) | all | P3 | 🟨 |
 | ~~M7~~ | ~~Stress / repro~~ | — | — | — | — | ❌ dropped (D7) |
 
 ## Notes per module
@@ -26,10 +28,17 @@ Status: ⬜ not started · 🟦 designing · 🟨 in progress · ✅ done
 - **M3 Crash-capture logger** — the highest-value piece for the seed use case. `fsync` per
   sample; GPU-lost detection via query timeout; bounded rotation; `systemd --user` service
   with a **user-selectable trigger mode** (always-on / game-launch / manual — D6).
+  *Implemented (manual trigger):* JSONL log with fsync-per-sample, size-based rotation
+  (`log_max_bytes`/`log_backups`), GPU-lost/recovered event markers, atomic status file, and
+  `rigdoctor record run|start|stop|status|report`. The foreground `run` is the systemd-ready
+  entrypoint; the service unit + always-on/game-launch triggers (D6/D12) land in Phase 4.
+  Also fully driven from the GUI's Recording/Logs page (M10) via shared `core.reccontrol`.
 - **M4 Health report** — turns scattered logs into a prioritized, plain-language findings
   list with **suggested** fixes (read-only, D9). Reuses M1 for a live snapshot. Also powers
   the **guided diagnostic session** (with M3): pick a game → focused capture → scan →
-  findings (see SPEC §4).
+  findings (see SPEC §4). *Implemented:* journalctl scan (Xid/panic/OOM/MCE/AER/thermal/amdgpu),
+  SMART, NVIDIA driver-mismatch, journald-persistence + live-temp checks; `rigdoctor report`
+  (text/JSON) + GUI Health tab. GPU-firmware verification deferred.
 - **M2 Live monitor** — depends on M1; the terminal "HWMonitor for Linux" face. Stdlib-only.
 - **M5 / M6 Diagnostics** — inventory export + gaming-env checks; M6 flags risky settings and
   suggests the fix command but does not apply it (D9).
@@ -37,20 +46,49 @@ Status: ⬜ not started · 🟦 designing · 🟨 in progress · ✅ done
 - **M10 Desktop GUI** — PySide6 graphical front-end over the core engine (dashboard, log
   browser, report viewer, logger controls). Optional; adds the Qt dependency. *Bootstrapped
   early (ahead of its Phase 4 slot) at the user's request:* dark-themed window with sidebar
-  nav and a live dashboard (circular gauges + collapsible per-subsystem cards, temperature-
-  colored values); Logs/Health/Inventory are placeholders until M3–M5.
+  nav, a live dashboard (circular gauges + collapsible per-subsystem cards, temperature-
+  colored values), and a **Recording/Logs page** with full M3 controls (start/stop/status +
+  post-crash report). Health/Inventory remain placeholders until M4/M5. GUI-first per D17.
 - **M11 Tray applet** — `QSystemTrayIcon` menu-bar applet. Dropdown shows live M1 readouts
   (CPU temp, GPU temp, memory used/total, status dot) and is led by a **Run Diagnostic**
   action (the guided diagnostic session), plus Open dashboard / Start-Stop recording /
   Snapshot / Quit (D13). Optional; shares the Qt dependency with M10.
 - **M9 Installer** — interactive wizard layered on the `.deb` (D8); apt-first dependency
-  resolution; enables the logger service and trigger mode.
+  resolution; enables the logger service and trigger mode. *Implemented (first cut):* distro/
+  package-manager/GPU detection (`core/sysenv`), an optional-component catalog (`core/catalog`),
+  and dependency install via pkexec/sudo — `rigdoctor install [--check] [-y]` + GUI Setup tab.
+  The **user-local app install** is `install.sh` (private venv + `~/.local/bin` launchers +
+  desktop entry, no root; handles the `python3-venv` prerequisite) plus a self-extracting
+  **`.run`** (pure-Python self-extractor, `packaging/make_run.py`, built by CI). *Pending:*
+  config/module selection + `systemd --user`
+  service enable.
+- **M12 Session sharing / remote assist** (D16) — let a helper inspect a user's machine, in
+  an escalating ladder: (1) **diagnostic bundle export** (inventory + recent log + report,
+  one-way), (2) **live read-only view** over a user-chosen tunnel (Tailscale/cloudflared/SSH,
+  no hosted relay), (3) **gated interactive terminal** wrapping tmate/sshx (read-only by
+  default; read-write only on explicit consent — a deliberate exception to D9). Per-session
+  consent, ephemeral revocable tokens, audit log.
+- **M13 Auto-update** (D18) — *check + auth implemented:* updates are **gated to Gitea account
+  holders** via a Personal Access Token, stored **encrypted in the OS keyring** (`secret-tool`)
+  with a 0600-file fallback (`config.load_token`/`save_token`/`token_backend`). `core/updates`
+  queries the releases API with the token; CLI `login`/`logout`/`update`; GUI Setup "Update
+  access" panel + sidebar states. The no-root **self-update apply** is implemented:
+  `rigdoctor update` runs an authenticated `pip install --upgrade "rigdoctor[gui] @
+  git+https://oauth2:<token>@…@<tag>"` into the user-local venv (GUI "Update to v…" button +
+  restart prompt; token scrubbed). Installed via the user-local **`install.sh`** /
+  self-extracting **`.run`** (M9).
+  *Original plan:* On launch, check the public Gitea releases API and
+  **self-update a user-local install with no root** (download → verify checksum/signature →
+  atomic symlink swap → restart, incl. the daemon). HTTPS-only, version-check-only (no
+  telemetry), opt-out-able. Surfaced in the GUI; `rigdoctor update` in the CLI. (`.deb` users
+  update via apt instead.)
 
 ## Bundles (final — D14)
 - **Essential:** M1 + M3 + M4  *(the MVP, NVIDIA-only — D5)*
 - **Monitoring:** M2 + M8
 - **Diagnostics:** M5 + M6
 - **Desktop UI:** M10 + M11  *(adds PySide6)*
+- **Sharing:** M12  *(session sharing / remote assist — D16)*
 
 ## MVP candidate — *confirmed (D5)*
 **M1 + M3 + M4 (Essential), NVIDIA-only, CLI-first.** Gives a working tool that captures the

docs/ROADMAP.md

@@ -11,13 +11,13 @@ Ubuntu + NVIDIA first; `.deb` distribution (see `DECISIONS.md`).
 - [x] Lock the MVP scope (M1 + M3 + M4, NVIDIA-only)
 
 ## Phase 1 — MVP: capture *this* crash  (Essential bundle, NVIDIA-only, CLI)
-- [ ] M1 sensor core (NVIDIA via nvidia-smi + hwmon for CPU/RAM/NVMe), stdlib-only
-- [ ] M3 crash-capture logger (CSV, fsync per sample, GPU-lost detection, rotation,
-      `systemd --user` service)
-- [ ] Manual trigger mode first (`rigdoctor record start/stop`); other modes in Phase 4
-- [ ] M4 health report (Xid/panic/OOM/MCE/AER/thermal scan + driver-mismatch + snapshot,
-      suggested fixes only — D9)
-- [ ] `--report` post-crash summary (max temps/power, throttle events, last N samples)
+- [x] M1 sensor core (NVIDIA via nvidia-smi + hwmon for CPU/RAM/NVMe), stdlib-only
+- [x] M3 crash-capture logger (JSONL, fsync per sample, GPU-lost detection, size rotation)
+- [x] Manual trigger mode (`rigdoctor record run/start/stop/status`); `systemd --user`
+      service + other trigger modes in Phase 4 (`run` is already the service entrypoint)
+- [x] M4 health report (Xid/panic/OOM/MCE/AER/thermal scan + SMART + driver-mismatch +
+      journald-persistence + live temps, suggested fixes only — D9; GPU-firmware verify deferred)
+- [x] `record report` post-crash summary (peak temps/power per subsystem, events, last N samples)
 - **Exit criteria:** user can run it during gaming and, after a freeze/black-screen, see the
   last readings + a plausible cause.
 
@@ -39,16 +39,30 @@ Ubuntu + NVIDIA first; `.deb` distribution (see `DECISIONS.md`).
 - [ ] Logger trigger modes: always-on + game-launch (D12 — wrapper first:
       `rigdoctor wrap %command%` + global Steam compat-tool; zero-config watcher
       (Steam RunningAppID + /proc) and GameMode hook follow)
-- [ ] M9 interactive installer (GPU detection, module menu, apt dependency resolution,
-      service enable + trigger-mode pick)
+- [~] M9 interactive installer — *done:* distro/GPU detection + optional-dependency install
+      (`rigdoctor install`, GUI Setup tab); **user-local `install.sh` + self-extracting `.run`**
+      (no-root venv install, handles python3-venv prereq, CI-built). *Pending:* module-selection
+      config + `systemd --user` service enable + trigger-mode pick.
 - [ ] `.deb` packaging (D8) declaring per-bundle deps incl. python3-pyside6 for Desktop UI
 
 ## Phase 5 — Breadth (later)
 - [ ] AMD GPU support in M1 (Steam Deck / Radeon)
 - [ ] Intel GPU best-effort
+- [x] M13 auto-update (D18) — launch-time version check (GUI sidebar) + no-root self-update
+      apply (`rigdoctor update` / sidebar button → authenticated pip upgrade), token-gated.
+      Restart-after-update is manual for now.
 - [ ] (Later, separate milestone) Optional auto-apply of suggested fixes behind explicit
       consent — currently out of scope (D9)
 
+## Phase 6 — Session sharing / remote assist  (M12, D16)
+Escalating ladder, built in order:
+- [ ] Tier 1: `share export` — diagnostic bundle (inventory + recent log + report); B opens
+      it in RigDoctor. One-way, safest.
+- [x] Tier 2: live read-only view — `rigdoctor share serve` (stdlib HTTP, token-gated:
+      sensors + health + inventory). Remote = user-chosen tunnel; GUI controls still to add.
+- [x] Tier 3: host-consented interactive terminal — a real PTY shell shared over the relay
+      (own `pty`, pyte-rendered guest), off by default; host reads along + can type (sudo).
+
 > **Out of scope:** stress/repro module (D7); multi-distro support and packaging beyond
 > Ubuntu/apt + `.deb` (D15) — a thin seam is kept but not built out.
 

docs/SPEC.md

@@ -31,8 +31,9 @@ RigDoctor's crash-safe logger is designed to fix exactly that.
 - Catch and preserve the machine's state in the seconds before a hard freeze.
 - Make hard-to-investigate gaming faults debuggable: collect scattered signals, correlate
   them, and explain them.
-- Offer **three ways to run**: full **CLI / headless** (works over SSH), a **desktop GUI**,
-  and a **system-tray / top-menu-bar applet** with quick actions. (D10/D11)
+- Be **GUI-first** (D17): the **desktop GUI** is the primary interface, complemented by a
+  **system-tray / top-menu-bar applet** for quick actions — backed by a **full CLI** that
+  keeps complete functionality for headless / SSH / scripting use. (D10/D11/D17)
 - Be modular: a novice installs a one-click "monitor + capture + report" bundle; a power
   user installs everything including the GUI, tray, and diagnostics.
 - Low overhead; safe defaults; no telemetry/phone-home.
@@ -135,7 +136,18 @@ rather than adding a new one.
 Interactive wizard: detect GPU vendor (NVIDIA-first) → present module menu grouped into
 bundles with descriptions and the exact packages each needs → resolve & install (apt first)
 → write config → optionally enable the `systemd --user` logger service and pick its trigger
-mode. Delivered alongside the `.deb` (D8). Module list/bundling is final per D14.
+mode. Delivered with the user-local install (and the optional `.deb`) (D8). Module
+list/bundling is final per D14.
+
+### M12 — Session sharing / remote assist (D16)
+Lets a user (A) grant a helper (B) inspection access, as an escalating, consent-driven
+ladder: (1) **diagnostic bundle export** (inventory + recent capture log + report, one-way);
+(2) **live read-only view** of the dashboard + logs over a user-chosen tunnel
+(Tailscale/cloudflared/SSH — no RigDoctor-hosted relay); (3) **gated interactive terminal**
+wrapping an existing tool (tmate/sshx), read-only by default, read-write only on explicit
+consent. Per-session consent, ephemeral revocable tokens, permission escalation (view ≠
+shell), and a session audit log. Tier 3 is a deliberate, consent-gated exception to the
+read-only stance (D9). Built in Phase 6.
 
 ## 5. Non-functional requirements
 - **Zero hard deps for the core/CLI/daemon** — Python stdlib + tools already present. **Qt
@@ -144,8 +156,9 @@ mode. Delivered alongside the `.deb` (D8). Module list/bundling is final per D14
 - **Crash-safe logging** — flush + `fsync` per sample; bounded disk usage.
 - **Low overhead** — default ≤1 Hz sampling; negligible CPU/GPU cost. The always-on daemon
   is stdlib-only (no Qt loaded) so it stays tiny.
-- **Headless-equivalent** — every diagnostic capability is reachable from the CLI; the GUI
-  and tray are conveniences over the same engine, never the only way to do something.
+- **GUI-first, CLI-complete** (D17) — the GUI is the primary interface, but every capability
+  is *also* reachable from the CLI so RigDoctor runs fully headless (SSH/servers). Both
+  front-ends sit over the same engine; neither is the only way to do something.
 - **Privacy** — local only; inventory export is opt-in and reviewable; no telemetry.
 - **Portability** — graceful degradation when a sensor/tool is unavailable (N/A, not crash).
 

install.sh

@@ -0,0 +1,117 @@
+#!/usr/bin/env sh
+# RigDoctor user-local installer (no root). Creates a private venv, links the
+# `rigdoctor` / `rigdoctor-gui` commands into ~/.local/bin, and adds a desktop
+# entry. Installs from a bundled wheel (the .run installer) or from a source
+# checkout. Re-run to upgrade; `./install.sh --uninstall` to remove.
+set -eu
+
+APP_NAME=rigdoctor
+DATA_HOME="${XDG_DATA_HOME:-$HOME/.local/share}"
+VENV="$DATA_HOME/$APP_NAME/venv"
+BIN_DIR="$HOME/.local/bin"
+DESKTOP_DIR="$DATA_HOME/applications"
+DESKTOP_FILE="$DESKTOP_DIR/rigdoctor.desktop"
+SCRIPT_DIR=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+
+uninstall() {
+    echo "Removing RigDoctor user-local install…"
+    rm -rf "$VENV"
+    rm -f "$BIN_DIR/rigdoctor" "$BIN_DIR/rigdoctor-gui" "$DESKTOP_FILE" \
+          "$DATA_HOME/icons/hicolor/scalable/apps/rigdoctor.svg"
+    echo "Done. (Config and logs under ~/.config/rigdoctor and ~/.local/share/rigdoctor were kept.)"
+}
+
+REF=""
+while [ $# -gt 0 ]; do
+    case "$1" in
+        --uninstall) uninstall; exit 0 ;;
+        --ref) REF="${2:-}"; [ -n "$REF" ] || { echo "--ref needs a tag"; exit 1; }; shift 2 ;;
+        -h|--help) echo "Usage: install.sh [--ref <tag>] [--uninstall]"; exit 0 ;;
+        *) echo "Unknown option: $1"; exit 1 ;;
+    esac
+done
+
+PY=python3
+command -v "$PY" >/dev/null 2>&1 || { echo "python3 not found — install Python 3.11+."; exit 1; }
+"$PY" - <<'EOF' || { echo "Python 3.11+ is required."; exit 1; }
+import sys
+sys.exit(0 if sys.version_info >= (3, 11) else 1)
+EOF
+
+# venv support (ensurepip) is required; install python3-venv if it's missing.
+if ! "$PY" -c "import ensurepip" >/dev/null 2>&1; then
+    PYVER=$("$PY" -c "import sys; print(f'{sys.version_info.major}.{sys.version_info.minor}')")
+    PKGS="python3-venv python${PYVER}-venv"
+    echo "Python venv support is missing — needs: $PKGS"
+    if command -v pkexec >/dev/null 2>&1; then ESC=pkexec
+    elif command -v sudo >/dev/null 2>&1; then ESC=sudo
+    else ESC=""; fi
+    if [ -n "$ESC" ] && command -v apt-get >/dev/null 2>&1; then
+        echo "Installing $PKGS (you may be prompted for your password)…"
+        "$ESC" sh -c "apt-get update && apt-get install -y $PKGS" \
+            || { echo "Failed. Install manually: sudo apt install $PKGS"; exit 1; }
+    else
+        echo "Install it manually, then re-run: sudo apt install $PKGS"
+        exit 1
+    fi
+fi
+
+# Where to install from: a specific released tag (--ref), a bundled wheel, or source.
+WHEEL=$(ls "$SCRIPT_DIR"/rigdoctor-*.whl 2>/dev/null | head -n1 || true)
+if [ -n "$REF" ]; then
+    CONF="${XDG_CONFIG_HOME:-$HOME/.config}/rigdoctor/token"
+    TOKEN="${RIGDOCTOR_TOKEN:-$(cat "$CONF" 2>/dev/null || true)}"
+    [ -n "$TOKEN" ] || { echo "--ref needs a token (run 'rigdoctor login' or set RIGDOCTOR_TOKEN)."; exit 1; }
+    SRC="rigdoctor[gui] @ git+https://oauth2:$TOKEN@git.jesseyvanofferen.com/jessey/rigdoctor.git@$REF"
+elif [ -n "$WHEEL" ]; then
+    SRC="$WHEEL[gui]"
+elif [ -f "$SCRIPT_DIR/pyproject.toml" ]; then
+    SRC="$SCRIPT_DIR[gui]"
+else
+    echo "No bundled wheel or source found next to the installer."
+    exit 1
+fi
+
+echo "Creating venv at $VENV…"
+"$PY" -m venv "$VENV"
+"$VENV/bin/pip" install --upgrade pip >/dev/null
+echo "Installing RigDoctor (pulls in PySide6 — this can take a minute)…"
+"$VENV/bin/pip" install "$SRC"
+
+mkdir -p "$BIN_DIR"
+ln -sf "$VENV/bin/rigdoctor" "$BIN_DIR/rigdoctor"
+ln -sf "$VENV/bin/rigdoctor-gui" "$BIN_DIR/rigdoctor-gui"
+
+# Install the app icon (for the dock/launcher); fall back to a stock icon.
+ICON_NAME=utilities-system-monitor
+ICON_SRC=$("$VENV/bin/python" -c "import os, rigdoctor.gui as g; print(os.path.join(os.path.dirname(g.__file__), 'assets', 'rigdoctor.svg'))" 2>/dev/null || true)
+if [ -n "$ICON_SRC" ] && [ -f "$ICON_SRC" ]; then
+    ICON_DST="$DATA_HOME/icons/hicolor/scalable/apps/rigdoctor.svg"
+    mkdir -p "$(dirname "$ICON_DST")"
+    cp "$ICON_SRC" "$ICON_DST"
+    ICON_NAME=rigdoctor
+    command -v gtk-update-icon-cache >/dev/null 2>&1 && gtk-update-icon-cache -qtf "$DATA_HOME/icons/hicolor" 2>/dev/null || true
+fi
+
+mkdir -p "$DESKTOP_DIR"
+cat > "$DESKTOP_FILE" <<EOF
+[Desktop Entry]
+Type=Application
+Name=RigDoctor
+Comment=Hardware monitoring & crash diagnostics for Linux gamers
+Exec=$VENV/bin/rigdoctor-gui
+Icon=$ICON_NAME
+Terminal=false
+Categories=System;Monitor;Utility;
+StartupWMClass=rigdoctor
+EOF
+command -v update-desktop-database >/dev/null 2>&1 && update-desktop-database "$DESKTOP_DIR" 2>/dev/null || true
+
+echo
+echo "RigDoctor $("$VENV/bin/rigdoctor" --version 2>/dev/null | awk '{print $2}') installed."
+echo "  GUI:  rigdoctor-gui   (or find 'RigDoctor' in your app menu)"
+echo "  CLI:  rigdoctor --help"
+case ":$PATH:" in
+    *":$BIN_DIR:"*) ;;
+    *) echo "  Note: add $BIN_DIR to your PATH (a fresh login usually does this).";;
+esac

packaging/bump.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env sh
+# Auto-set the next version from Conventional Commits (git-cliff), per D21.
+# Run after committing your feat:/fix: changes; it updates __init__.py + pyproject.toml.
+# Then update CHANGELOG.md, commit as `chore(release): vX.Y.Z`, and push (CI tags + releases).
+set -eu
+
+ROOT=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
+cd "$ROOT"
+
+command -v git-cliff >/dev/null 2>&1 || { echo "git-cliff not found. Install: pip install git-cliff"; exit 1; }
+
+NEXT=$(git-cliff --bumped-version | sed 's/^v//')
+[ -n "$NEXT" ] || { echo "Could not compute the next version."; exit 1; }
+
+python3 - "$NEXT" <<'PY'
+import pathlib, re, sys
+version = sys.argv[1]
+init = pathlib.Path("src/rigdoctor/__init__.py")
+init.write_text(re.sub(r'__version__ = "[^"]+"', f'__version__ = "{version}"', init.read_text()))
+proj = pathlib.Path("pyproject.toml")
+proj.write_text(re.sub(r'(?m)^version = "[^"]+"', f'version = "{version}"', proj.read_text(), count=1))
+PY
+
+echo "Set version to $NEXT."
+echo "Next: add a '## [$NEXT]' CHANGELOG section, then commit as 'chore(release): v$NEXT'."

packaging/changelog.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env sh
+# Regenerate CHANGELOG.md from Conventional Commits using git-cliff (D20).
+# Install once:  pip install git-cliff   (ships prebuilt binaries)
+# Usage:         packaging/changelog.sh [--tag vX.Y.Z]
+set -eu
+
+ROOT=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
+cd "$ROOT"
+
+command -v git-cliff >/dev/null 2>&1 || {
+    echo "git-cliff not found. Install it: pip install git-cliff"
+    exit 1
+}
+
+if [ "${1:-}" = "--tag" ] && [ -n "${2:-}" ]; then
+    git-cliff --tag "$2" -o CHANGELOG.md
+else
+    git-cliff -o CHANGELOG.md
+fi
+echo "Wrote CHANGELOG.md"

packaging/make-run.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env sh
+# Build the self-extracting .run installer (delegates to make_run.py — no makeself).
+exec python3 "$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)/make_run.py" "$@"

packaging/make_run.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+"""Build a dependency-free self-extracting .run installer (no makeself).
+
+Produces dist/rigdoctor-<version>-installer.run: a POSIX shell stub with an appended
+tar.gz of the wheel + install.sh. Running it extracts to a temp dir and runs install.sh.
+"""
+
+from __future__ import annotations
+
+import io
+import os
+import subprocess
+import sys
+import tarfile
+import tomllib
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parent.parent
+MARKER = "__RIGDOCTOR_ARCHIVE__"
+
+STUB = f"""#!/bin/sh
+# RigDoctor self-extracting installer. Extracts the embedded archive and runs install.sh.
+set -eu
+SKIP=$(awk '/^{MARKER}$/ {{ print NR + 1; exit 0 }}' "$0")
+TMP=$(mktemp -d)
+tail -n +"$SKIP" "$0" | tar -xz -C "$TMP"
+sh "$TMP/install.sh" "$@"
+RET=$?
+rm -rf "$TMP"
+exit $RET
+{MARKER}
+"""
+
+
+def main() -> int:
+    version = tomllib.loads((ROOT / "pyproject.toml").read_text())["project"]["version"]
+    dist = ROOT / "dist"
+    dist.mkdir(exist_ok=True)
+
+    wheel = dist / f"rigdoctor-{version}-py3-none-any.whl"
+    if not wheel.exists():
+        subprocess.run([sys.executable, "-m", "build", "--wheel"], cwd=ROOT, check=True)
+    if not wheel.exists():
+        print(f"wheel not found: {wheel}", file=sys.stderr)
+        return 1
+
+    buf = io.BytesIO()
+    with tarfile.open(fileobj=buf, mode="w:gz") as tar:
+        tar.add(wheel, arcname=wheel.name)
+        tar.add(ROOT / "install.sh", arcname="install.sh")
+
+    out = dist / f"rigdoctor-{version}-installer.run"
+    with open(out, "wb") as f:
+        f.write(STUB.encode())
+        f.write(buf.getvalue())
+    os.chmod(out, 0o755)
+    print(f"Built {out}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "rigdoctor"
-version = "0.1.0"
+version = "0.7.2"
 description = "Modular hardware monitoring & crash diagnostics for Linux gamers."
 readme = "README.md"
 requires-python = ">=3.11"
@@ -13,7 +13,7 @@ requires-python = ">=3.11"
 dependencies = []
 
 [project.optional-dependencies]
-gui = ["PySide6"]
+gui = ["PySide6", "pyte"]
 
 [project.scripts]
 rigdoctor = "rigdoctor.cli:main"
@@ -21,3 +21,6 @@ rigdoctor-gui = "rigdoctor.gui.app:main"
 
 [tool.setuptools.packages.find]
 where = ["src"]
+
+[tool.setuptools.package-data]
+rigdoctor = ["gui/assets/*.svg"]

src/rigdoctor/__init__.py

@@ -1,3 +1,3 @@
 """RigDoctor — modular hardware monitoring & crash diagnostics for Linux gamers."""
 
-__version__ = "0.1.0"
+__version__ = "0.7.2"

src/rigdoctor/cli.py

@@ -4,13 +4,18 @@ from __future__ import annotations
 
 import argparse
 import json
+import os
+import signal
 import sys
+import time
+from pathlib import Path
 
-from . import __version__
+from . import __version__, config
 from .config import load_config
+from .core import reccontrol
 from .core.sampler import Sampler
 from .core.sources import available_sources
-from .render import render_snapshot
+from .render import format_headline, render_snapshot, render_summary
 
 
 def _sampler() -> Sampler:
@@ -64,14 +69,280 @@ def cmd_gui(args) -> int:
     return gui_main([sys.argv[0]])
 
 
-def cmd_record(args) -> int:
-    print("`record` (M3 crash-capture logger) is not implemented yet — next on the roadmap.")
-    return 2
+# --- M3 crash-capture logger ---------------------------------------------------
+
+def cmd_record_run(args) -> int:
+    cfg = load_config()
+    interval = args.interval or cfg["interval"]
+    log_path = Path(args.out) if args.out else config.LOG_FILE
+    config.STATE_DIR.mkdir(parents=True, exist_ok=True)
+    config.PID_FILE.write_text(str(os.getpid()))
+
+    from .core.recorder import Recorder
+
+    recorder = Recorder(
+        interval=interval,
+        log_path=log_path,
+        max_bytes=cfg["log_max_bytes"],
+        backups=cfg["log_backups"],
+        status_path=config.STATUS_FILE,
+    )
+
+    def _handle(_sig, _frame):
+        recorder.stop()
+
+    signal.signal(signal.SIGTERM, _handle)
+    signal.signal(signal.SIGINT, _handle)
+
+    print(f"Recording to {log_path} every {interval:g}s — stop with Ctrl-C or `rigdoctor record stop`.")
+    try:
+        recorder.run()
+    finally:
+        try:
+            config.PID_FILE.unlink()
+        except OSError:
+            pass
+    print(f"Stopped after {recorder.samples} samples.")
+    return 0
+
+
+def cmd_record_start(args) -> int:
+    if reccontrol.running_pid():
+        print(f"Recorder already running (pid {reccontrol.running_pid()}).")
+        return 0
+    pid = reccontrol.start_background(args.interval, args.out)
+    time.sleep(1.0)  # let it come up
+    if pid and reccontrol.pid_alive(pid):
+        print(f"Recording started in the background (pid {pid}).")
+        print(f"  log:    {args.out or config.LOG_FILE}")
+        print("  status: rigdoctor record status   ·   stop: rigdoctor record stop")
+        return 0
+    print(f"Recorder failed to start; see {config.SPAWN_LOG}")
+    return 1
+
+
+def cmd_record_stop(args) -> int:
+    pid = reccontrol.running_pid()
+    if not pid:
+        print("Recorder is not running.")
+        return 0
+    if not reccontrol.stop_background():
+        print(f"Could not stop recorder (pid {pid}).")
+        return 1
+    for _ in range(50):
+        if not reccontrol.pid_alive(pid):
+            break
+        time.sleep(0.1)
+    print(f"Recorder stopped (pid {pid}).")
+    return 0
+
+
+def cmd_record_status(args) -> int:
+    pid = reccontrol.running_pid()
+    status = reccontrol.read_status()
+    print(f"● recording (pid {pid})" if pid else "○ not recording")
+    if status:
+        print(f"  log:     {status.get('log')}")
+        print(f"  samples: {status.get('samples')}")
+        if status.get("started"):
+            print(f"  started: {time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(status['started']))}")
+        if status.get("updated"):
+            print(f"  updated: {time.strftime('%H:%M:%S', time.localtime(status['updated']))}")
+        if status.get("gpu_lost"):
+            print("  ⚠ a GPU-lost event was recorded this session")
+        if status.get("latest"):
+            print(f"  latest:  {format_headline(status['latest'])}")
+    return 0
+
+
+def cmd_record_report(args) -> int:
+    from .core.crashlog import summarize
+
+    log_path = Path(args.log) if args.log else config.LOG_FILE
+    summary = summarize(log_path, last_n=args.last)
+    print(render_summary(summary, log_path=log_path))
+    return 0
+
+
+def cmd_install(args) -> int:
+    from .core import installer, sysenv
+
+    print(f"Distro:          {sysenv.distro_name()}")
+    pm = sysenv.package_manager()
+    print(f"Package manager: {pm or 'none (only apt is supported)'}")
+    print(f"GPU:             {', '.join(sysenv.gpu_vendors()) or 'unknown'}\n")
+
+    status = installer.component_status()
+    print("Optional components:")
+    for component, present in status:
+        mark = "✓" if present else "✗"
+        print(f"  [{mark}] {component.name:<22} — {component.enables}")
+        if not present:
+            print(f"        apt: {' '.join(component.apt)}")
+
+    missing = [c for c, present in status if not present]
+    if not missing:
+        print("\nAll optional components are installed. ✔")
+        return 0
+
+    packages = installer.missing_packages(missing)
+    print(f"\nMissing packages: {' '.join(packages)}")
+    if args.check:
+        return 0
+    if pm != "apt":
+        print(f"Automatic install needs apt. Install manually:\n  sudo apt install {' '.join(packages)}")
+        return 1
+    if not args.yes:
+        try:
+            reply = input(f"\nInstall {len(packages)} package(s) now? [y/N] ").strip().lower()
+        except EOFError:
+            reply = "n"
+        if reply not in ("y", "yes"):
+            print("Aborted.")
+            return 1
+
+    print("Installing (you may be prompted for your password)…")
+    rc, out = installer.install_packages(packages)
+    print(out[-2000:])
+    if rc == 0:
+        still = [c.name for c, present in installer.component_status() if not present]
+        print("\nStill missing: " + (", ".join(still) if still else "none ✔"))
+    else:
+        print(f"\nInstall failed (exit {rc}).")
+    return rc
+
+
+def cmd_login(args) -> int:
+    from getpass import getpass
+
+    from .core import updates
+
+    token = args.token
+    if not token:
+        print(f"Create a token (scope read:repository) at: {updates.TOKEN_PAGE}")
+        try:
+            token = getpass("Paste token: ").strip()
+        except (EOFError, KeyboardInterrupt):
+            token = ""
+    if not token:
+        print("No token provided.")
+        return 1
+    config.save_token(token)
+    state, tag, _notes = updates.update_state()
+    if state == updates.AUTH:
+        print("Token saved, but the server rejected it (check scope/permissions).")
+        return 1
+    if state in (updates.UP_TO_DATE, updates.AVAILABLE):
+        print(f"Token saved and verified. Latest release: {tag}.")
+        return 0
+    print("Token saved (couldn't reach the server to verify right now).")
+    return 0
+
+
+def cmd_logout(args) -> int:
+    config.clear_token()
+    print("Update token removed.")
+    return 0
+
+
+def cmd_update(args) -> int:
+    from .core import updates
+
+    state, tag, notes = updates.update_state()
+    if state == updates.NO_TOKEN:
+        print("No update token. Run `rigdoctor login` after creating one at:")
+        print(f"  {updates.TOKEN_PAGE}")
+        return 1
+    if state == updates.AUTH:
+        print("The update server rejected your token (check scope/permissions).")
+        return 1
+    if state == updates.NETWORK:
+        print("Couldn't reach the update server.")
+        return 1
+    if state == updates.UP_TO_DATE:
+        print(f"Up to date (v{__version__}).")
+        return 0
+    # AVAILABLE
+    print(f"Update available: {tag}  (current v{__version__}).")
+    if notes:
+        print("\nWhat's new:\n" + "\n".join("  " + ln for ln in notes.splitlines()) + "\n")
+    if args.check:
+        return 0
+    print(f"Installing {tag}…")
+    rc, out = updates.apply_update(tag)
+    print(out[-2000:])
+    if rc == 0:
+        print(f"\nUpdated to {tag}. Restart RigDoctor to use the new version.")
+        return 0
+    print(f"\nUpdate failed (exit {rc}).")
+    return rc
+
+
+def cmd_uninstall(args) -> int:
+    from .core import uninstall as uninstaller
+
+    scope = "everything (app + settings, token, and logs)" if args.purge else "the app (settings/logs kept)"
+    if not args.yes:
+        try:
+            reply = input(f"Uninstall RigDoctor — remove {scope}? [y/N] ").strip().lower()
+        except EOFError:
+            reply = "n"
+        if reply not in ("y", "yes"):
+            print("Aborted.")
+            return 1
+    uninstaller.uninstall(purge=args.purge)
+    print("Uninstalling… RigDoctor will be removed momentarily.")
+    return 0
+
+
+def cmd_share_serve(args) -> int:
+    from .core import share
+
+    return share.serve(host=args.host, port=args.port)
+
+
+def cmd_collect_priv(args) -> int:
+    """Internal: emit root-only data (SMART + dmidecode) as JSON, run via pkexec at launch."""
+    from dataclasses import asdict
+
+    from .core.health import check_smart
+    from .core.inventory import _dmidecode
+
+    data = {"smart": [asdict(f) for f in check_smart()], "dmidecode": _dmidecode()}
+    print(json.dumps(data))
+    return 0
+
+
+def cmd_inventory(args) -> int:
+    from .core import inventory
+
+    sections = inventory.collect()
+    if args.json:
+        text = inventory.render_json(sections)
+    elif args.markdown:
+        text = inventory.render_markdown(sections)
+    else:
+        text = inventory.render_text(sections)
+    if args.output:
+        Path(args.output).write_text(text)
+        print(f"Wrote {args.output}")
+    else:
+        print(text)
+    return 0
 
 
 def cmd_report(args) -> int:
-    print("`report` (M4 health report) is not implemented yet — next on the roadmap.")
-    return 2
+    from dataclasses import asdict
+
+    from .core.health import run_health_checks
+    from .render import render_health
+
+    findings = run_health_checks()
+    if args.json:
+        print(json.dumps([asdict(f) for f in findings], indent=2, ensure_ascii=False))
+    else:
+        print(render_health(findings))
+    return 0
 
 
 def build_parser() -> argparse.ArgumentParser:
@@ -92,8 +363,66 @@ def build_parser() -> argparse.ArgumentParser:
 
     sub.add_parser("gui", help="launch the desktop GUI (needs PySide6)").set_defaults(func=cmd_gui)
     sub.add_parser("sources", help="list detected sensor sources").set_defaults(func=cmd_sources)
-    sub.add_parser("record", help="crash-capture logger (coming soon)").set_defaults(func=cmd_record)
-    sub.add_parser("report", help="health report (coming soon)").set_defaults(func=cmd_report)
+
+    inst = sub.add_parser("install", help="set up optional system dependencies (M9)")
+    inst.add_argument("--check", action="store_true", help="report status only; install nothing")
+    inst.add_argument("-y", "--yes", action="store_true", help="install without confirmation")
+    inst.set_defaults(func=cmd_install)
+
+    login = sub.add_parser("login", help="save a Gitea token for updates (M13)")
+    login.add_argument("--token", default=None, help="token (prompted if omitted)")
+    login.set_defaults(func=cmd_login)
+    sub.add_parser("logout", help="remove the saved update token").set_defaults(func=cmd_logout)
+
+    upd = sub.add_parser("update", help="check for / apply a newer version (M13)")
+    upd.add_argument("--check", action="store_true", help="only report, don't apply")
+    upd.set_defaults(func=cmd_update)
+
+    unin = sub.add_parser("uninstall", help="remove the user-local install")
+    unin.add_argument("--purge", action="store_true", help="also remove settings, token, and logs")
+    unin.add_argument("-y", "--yes", action="store_true", help="don't ask for confirmation")
+    unin.set_defaults(func=cmd_uninstall)
+
+    rec = sub.add_parser("record", help="crash-capture logger (M3)")
+    rec_sub = rec.add_subparsers(dest="record_cmd", required=True)
+
+    run_p = rec_sub.add_parser("run", help="run the capture loop in the foreground (systemd-friendly)")
+    run_p.add_argument("-n", "--interval", type=float, default=None, help="sampling interval (s)")
+    run_p.add_argument("-o", "--out", default=None, help="log file path")
+    run_p.set_defaults(func=cmd_record_run)
+
+    start_p = rec_sub.add_parser("start", help="start recording in the background")
+    start_p.add_argument("-n", "--interval", type=float, default=None, help="sampling interval (s)")
+    start_p.add_argument("-o", "--out", default=None, help="log file path")
+    start_p.set_defaults(func=cmd_record_start)
+
+    rec_sub.add_parser("stop", help="stop background recording").set_defaults(func=cmd_record_stop)
+    rec_sub.add_parser("status", help="show recorder status").set_defaults(func=cmd_record_status)
+
+    report_p = rec_sub.add_parser("report", help="summarize the captured log (post-crash)")
+    report_p.add_argument("--last", type=int, default=10, help="recent samples to show")
+    report_p.add_argument("--log", default=None, help="path to a capture log")
+    report_p.set_defaults(func=cmd_record_report)
+
+    rep = sub.add_parser("report", help="health report (M4): scan logs/SMART/driver for issues")
+    rep.add_argument("--json", action="store_true", help="output JSON instead of text")
+    rep.set_defaults(func=cmd_report)
+
+    cp = sub.add_parser("collect-priv", help=argparse.SUPPRESS)  # internal: run via pkexec
+    cp.set_defaults(func=cmd_collect_priv)
+
+    share_p = sub.add_parser("share", help="session sharing (M12)")
+    share_sub = share_p.add_subparsers(dest="share_cmd", required=True)
+    serve_p = share_sub.add_parser("serve", help="serve a read-only live view (token-gated)")
+    serve_p.add_argument("--host", default="127.0.0.1", help="bind address (use 0.0.0.0 + a tunnel for remote)")
+    serve_p.add_argument("--port", type=int, default=8765, help="port")
+    serve_p.set_defaults(func=cmd_share_serve)
+
+    inv = sub.add_parser("inventory", help="system inventory (M5): export hardware/OS details")
+    inv.add_argument("--json", action="store_true", help="output JSON")
+    inv.add_argument("--markdown", action="store_true", help="output Markdown (for forum/bug reports)")
+    inv.add_argument("-o", "--output", default=None, help="write to a file instead of stdout")
+    inv.set_defaults(func=cmd_inventory)
     return p
 
 

src/rigdoctor/config.py

@@ -3,6 +3,8 @@
 from __future__ import annotations
 
 import os
+import shutil
+import subprocess
 from pathlib import Path
 
 APP = "rigdoctor"
@@ -19,8 +21,128 @@ STATE_DIR = _xdg("XDG_STATE_HOME", ".local/state")
 LOG_DIR = DATA_DIR / "logs"
 CONFIG_FILE = CONFIG_DIR / "config.toml"
 
+# Crash-capture logger (M3)
+LOG_FILE = LOG_DIR / "capture.jsonl"
+STATUS_FILE = STATE_DIR / "recorder.json"
+PID_FILE = STATE_DIR / "recorder.pid"
+SPAWN_LOG = STATE_DIR / "recorder.out"
+
+# Update access token (M13) — gates updates to Gitea account holders (D18).
+# Stored in the OS keyring (Secret Service / GNOME Keyring) via `secret-tool` when
+# available — encrypted at rest, unlocked with the login session — else a 0600 file.
+TOKEN_FILE = CONFIG_DIR / "token"
+_SECRET_ATTRS = ["application", "rigdoctor", "type", "update-token"]
+
+
+def _secret_tool() -> str | None:
+    return shutil.which("secret-tool")
+
+
+def keyring_available() -> bool:
+    """True if an encrypted OS keyring (secret-tool) is usable."""
+    return _secret_tool() is not None
+
+
+def _keyring_store(token: str) -> bool:
+    tool = _secret_tool()
+    if not tool:
+        return False
+    try:
+        proc = subprocess.run(
+            [tool, "store", "--label", "RigDoctor update token", *_SECRET_ATTRS],
+            input=token, text=True, capture_output=True, timeout=20,
+        )
+        return proc.returncode == 0
+    except (subprocess.SubprocessError, OSError):
+        return False
+
+
+def _keyring_lookup() -> str | None:
+    tool = _secret_tool()
+    if not tool:
+        return None
+    try:
+        proc = subprocess.run(
+            [tool, "lookup", *_SECRET_ATTRS], text=True, capture_output=True, timeout=20
+        )
+        if proc.returncode == 0 and proc.stdout.strip():
+            return proc.stdout.strip()
+    except (subprocess.SubprocessError, OSError):
+        pass
+    return None
+
+
+def _keyring_clear() -> None:
+    tool = _secret_tool()
+    if not tool:
+        return
+    try:
+        subprocess.run([tool, "clear", *_SECRET_ATTRS], capture_output=True, timeout=20)
+    except (subprocess.SubprocessError, OSError):
+        pass
+
+
+def load_token() -> str | None:
+    """Token from $RIGDOCTOR_TOKEN, then the OS keyring, then a 0600 file."""
+    env = os.environ.get("RIGDOCTOR_TOKEN")
+    if env and env.strip():
+        return env.strip()
+    from_keyring = _keyring_lookup()
+    if from_keyring:
+        return from_keyring
+    try:
+        token = TOKEN_FILE.read_text().strip()
+        return token or None
+    except OSError:
+        return None
+
+
+def save_token(token: str) -> None:
+    """Save to the OS keyring if possible (encrypted); else a 0600 file."""
+    token = token.strip()
+    if _keyring_store(token):
+        try:  # don't leave a plaintext copy once it's in the keyring
+            TOKEN_FILE.unlink()
+        except OSError:
+            pass
+        return
+    CONFIG_DIR.mkdir(parents=True, exist_ok=True)
+    TOKEN_FILE.write_text(token + "\n")
+    try:
+        TOKEN_FILE.chmod(0o600)
+    except OSError:
+        pass
+
+
+def clear_token() -> None:
+    _keyring_clear()
+    try:
+        TOKEN_FILE.unlink()
+    except OSError:
+        pass
+
+
+def token_backend() -> str:
+    """Where the active token lives: 'env' | 'keyring' | 'file' | 'none'."""
+    env = os.environ.get("RIGDOCTOR_TOKEN")
+    if env and env.strip():
+        return "env"
+    if _keyring_lookup() is not None:
+        return "keyring"
+    if TOKEN_FILE.exists():
+        return "file"
+    return "none"
+
 DEFAULTS: dict = {
-    "interval": 1.0,  # sampling interval in seconds (default ≤1 Hz, low overhead — NFR)
+    "interval": 1.0,           # sampling interval in seconds (default ≤1 Hz — NFR)
+    "log_max_bytes": 20_000_000,  # rotate a log segment past this size
+    "log_backups": 10,            # keep this many rotated segments (bounds disk use)
+    "update_check_minutes": 30,   # re-check for updates this often while running (0 = off)
+    "elevate_on_launch": True,    # GUI asks for the password once at launch (SMART/dmidecode)
+    "alerts_enabled": True,       # desktop notifications on overheat / GPU-lost / new version
+    "gpu_temp_alert": 90.0,       # °C — alert when GPU reaches this
+    "cpu_temp_alert": 95.0,       # °C — alert when CPU reaches this
+    "relay_url": "wss://rigdoctor.jesseyvanofferen.com",  # session-sharing relay (M12)
 }
 
 
@@ -36,3 +158,27 @@ def load_config() -> dict:
     except Exception:
         pass
     return cfg
+
+
+def _toml_value(value) -> str:
+    if isinstance(value, bool):
+        return "true" if value else "false"
+    if isinstance(value, (int, float)):
+        return repr(value)
+    return '"' + str(value).replace("\\", "\\\\").replace('"', '\\"') + '"'
+
+
+def save_config(values: dict) -> None:
+    """Write a flat config.toml (stdlib has no TOML writer)."""
+    CONFIG_DIR.mkdir(parents=True, exist_ok=True)
+    lines = ["# RigDoctor config — edit in the app (Notifications) or here."]
+    lines += [f"{key} = {_toml_value(value)}" for key, value in values.items()]
+    CONFIG_FILE.write_text("\n".join(lines) + "\n")
+
+
+def update_config(**changes) -> dict:
+    """Merge changes into the current effective config and persist them."""
+    cfg = load_config()
+    cfg.update(changes)
+    save_config(cfg)
+    return cfg

src/rigdoctor/core/alerts.py

@@ -0,0 +1,91 @@
+"""Desktop alerts (M8): notify on overheat / GPU-lost / new version via notify-send.
+
+Edge-triggered: an alert fires when a condition becomes true (not every sample), and
+can fire again only after it has cleared and a cooldown has passed — so a hot GPU or a
+1-Hz sample loop doesn't spam notifications. Degrades to a no-op if notify-send is absent.
+"""
+
+from __future__ import annotations
+
+import shutil
+import subprocess
+import time
+
+from .sample import Sample
+
+APP_NAME = "RigDoctor"
+_ICON = "utilities-system-monitor"
+
+
+def available() -> bool:
+    return shutil.which("notify-send") is not None
+
+
+def notify(title: str, message: str, urgency: str = "normal") -> bool:
+    """Send a desktop notification (best-effort). urgency: low|normal|critical."""
+    if not available():
+        return False
+    try:
+        subprocess.run(
+            ["notify-send", "-a", APP_NAME, "-u", urgency, "-i", _ICON, title, message],
+            timeout=10,
+            check=False,
+        )
+        return True
+    except (subprocess.SubprocessError, OSError):
+        return False
+
+
+class AlertMonitor:
+    """Evaluate samples and raise edge-triggered desktop alerts."""
+
+    def __init__(self, gpu_temp: float = 90.0, cpu_temp: float = 95.0, cooldown: float = 300.0):
+        self.gpu_temp = gpu_temp
+        self.cpu_temp = cpu_temp
+        self.cooldown = cooldown
+        self.enabled = True
+        self._active: dict[str, bool] = {}
+        self._last: dict[str, float] = {}
+
+    def _fire(self, key: str, title: str, message: str, urgency: str = "critical") -> None:
+        if self._active.get(key):
+            return  # already alerting; wait until it clears
+        now = time.time()
+        if now - self._last.get(key, 0.0) < self.cooldown:
+            return
+        self._active[key] = True
+        self._last[key] = now
+        notify(title, message, urgency)
+
+    def _clear(self, key: str) -> None:
+        self._active[key] = False
+
+    def check(self, sample: Sample) -> None:
+        if not self.enabled:
+            return
+        gpu_t = next(
+            (r.value for r in sample.readings
+             if r.source == "gpu" and r.metric == "temp" and r.label == "" and r.value is not None),
+            None,
+        )
+        if gpu_t is not None:
+            if gpu_t >= self.gpu_temp:
+                self._fire("gpu_temp", "GPU overheating", f"GPU at {gpu_t:.0f} °C")
+            else:
+                self._clear("gpu_temp")
+
+        cpu_temps = [r.value for r in sample.readings
+                     if r.source == "cpu" and r.metric == "temp" and r.value is not None]
+        if cpu_temps:
+            cpu_t = max(cpu_temps)
+            if cpu_t >= self.cpu_temp:
+                self._fire("cpu_temp", "CPU overheating", f"CPU at {cpu_t:.0f} °C")
+            else:
+                self._clear("cpu_temp")
+
+        lost = any(r.source == "gpu" and r.metric == "status" and r.label == "query-timeout"
+                   for r in sample.readings)
+        if lost:
+            self._fire("gpu_lost", "GPU not responding", "nvidia-smi query timed out — the GPU may have dropped")
+        else:
+            self._clear("gpu_lost")

src/rigdoctor/core/catalog.py

@@ -0,0 +1,48 @@
+"""Installable component catalog (M9): optional system tools and what they enable.
+
+apt-only (D15). Core monitoring (M1/M3/M4) needs no packages — these are optional
+enrichments the installer can add. Each component is detected by a representative
+command (present == usable).
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+
+@dataclass(frozen=True)
+class Component:
+    id: str
+    name: str
+    bundle: str
+    enables: str          # capability unlocked when present
+    apt: tuple[str, ...]  # apt package name(s)
+    command: str          # command used to detect presence
+
+
+COMPONENTS: tuple[Component, ...] = (
+    Component(
+        "smartmontools", "SMART disk health", "Diagnostics",
+        "Disk health (SMART) in the health report", ("smartmontools",), "smartctl",
+    ),
+    Component(
+        "lm-sensors", "lm-sensors", "Diagnostics",
+        "Extra motherboard / voltage sensors", ("lm-sensors",), "sensors",
+    ),
+    Component(
+        "dmidecode", "dmidecode", "Diagnostics",
+        "Motherboard / BIOS / RAM details for system inventory", ("dmidecode",), "dmidecode",
+    ),
+    Component(
+        "pciutils", "pciutils", "Diagnostics",
+        "PCIe topology + GPU detection (lspci)", ("pciutils",), "lspci",
+    ),
+    Component(
+        "libnotify", "Desktop notifications", "Monitoring",
+        "Desktop alert notifications", ("libnotify-bin",), "notify-send",
+    ),
+    Component(
+        "libsecret", "Encrypted token storage", "Updates",
+        "Store the update token in the OS keyring, encrypted", ("libsecret-tools",), "secret-tool",
+    ),
+)

src/rigdoctor/core/crashlog.py

@@ -0,0 +1,177 @@
+"""Crash-capture log (M3): rotating, fsync-per-sample JSONL writer + reader + summary.
+
+On-disk format is JSON Lines, one record per line:
+  sample : {"ts": <float>, "readings": [[source, metric, value, unit, label], ...]}
+  event  : {"ts": <float>, "event": <str>, "detail": <str>}
+
+Every line is flushed and fsync'd, so the readings right before a hard lock survive.
+A torn final line (interrupted mid-write by a crash) is tolerated on read.
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import time
+from collections import deque
+from dataclasses import dataclass
+from pathlib import Path
+
+from .sample import Reading, Sample
+
+
+class CrashLogWriter:
+    """Append samples/events as JSONL, fsync per line, rotate by size."""
+
+    def __init__(self, path, max_bytes: int = 20_000_000, backups: int = 10) -> None:
+        self.path = Path(path)
+        self.max_bytes = int(max_bytes)
+        self.backups = int(backups)
+        self.path.parent.mkdir(parents=True, exist_ok=True)
+        self._fh = open(self.path, "a", encoding="utf-8")
+
+    def _write(self, obj: dict) -> None:
+        self._fh.write(json.dumps(obj, separators=(",", ":"), ensure_ascii=False))
+        self._fh.write("\n")
+        self._fh.flush()
+        os.fsync(self._fh.fileno())  # survive a hard lock
+        if self.max_bytes and self._fh.tell() >= self.max_bytes:
+            self._rotate()
+
+    def write_sample(self, sample: Sample) -> None:
+        rows = [[r.source, r.metric, r.value, r.unit, r.label] for r in sample.readings]
+        self._write({"ts": round(sample.ts, 3), "readings": rows})
+
+    def write_event(self, kind: str, detail: str = "") -> None:
+        self._write({"ts": round(time.time(), 3), "event": kind, "detail": detail})
+
+    def _rotate(self) -> None:
+        # Mirror logging.handlers.RotatingFileHandler: shift base.i -> base.i+1.
+        self._fh.close()
+        base = str(self.path)
+        for i in range(self.backups - 1, 0, -1):
+            src = Path(f"{base}.{i}")
+            dst = Path(f"{base}.{i + 1}")
+            if src.exists():
+                if dst.exists():
+                    dst.unlink()
+                src.rename(dst)
+        if self.backups > 0:
+            first = Path(f"{base}.1")
+            if first.exists():
+                first.unlink()
+            self.path.rename(first)
+        self._fh = open(self.path, "a", encoding="utf-8")
+
+    def close(self) -> None:
+        try:
+            self._fh.close()
+        except Exception:
+            pass
+
+
+def _segment_files(path) -> list[Path]:
+    """All log segments oldest→newest: base.N … base.1, base."""
+    base = Path(path)
+    numbered: list[tuple[int, Path]] = []
+    for p in base.parent.glob(base.name + ".*"):
+        suffix = p.name[len(base.name) + 1:]
+        if suffix.isdigit():
+            numbered.append((int(suffix), p))
+    numbered.sort(reverse=True)  # highest number = oldest
+    files = [p for _, p in numbered]
+    if base.exists():
+        files.append(base)
+    return files
+
+
+def iter_records(path, include_backups: bool = True):
+    """Yield parsed records oldest→newest, tolerating a torn final line."""
+    files = _segment_files(path) if include_backups else [Path(path)]
+    for f in files:
+        try:
+            with open(f, encoding="utf-8") as fh:
+                for line in fh:
+                    line = line.strip()
+                    if not line:
+                        continue
+                    try:
+                        yield json.loads(line)
+                    except ValueError:
+                        continue
+        except OSError:
+            continue
+
+
+def record_to_sample(rec: dict) -> Sample:
+    readings = [Reading(s, m, v, u, label) for s, m, v, u, label in rec.get("readings", [])]
+    return Sample(ts=rec.get("ts", 0.0), readings=readings)
+
+
+def headline(sample: Sample) -> dict:
+    """Extract the few at-a-glance values used by status/report displays."""
+
+    def find(source: str, metric: str, label: str | None = None):
+        for r in sample.readings:
+            if r.source == source and r.metric == metric and (label is None or r.label == label):
+                return r.value
+        return None
+
+    cpu_pkg = None
+    cpu_temps = []
+    for r in sample.readings:
+        if r.source == "cpu" and r.metric == "temp" and r.value is not None:
+            cpu_temps.append(r.value)
+            low = r.label.lower()
+            if cpu_pkg is None and (low.startswith("package") or "tctl" in low or "tdie" in low):
+                cpu_pkg = r.value
+    if cpu_pkg is None and cpu_temps:
+        cpu_pkg = max(cpu_temps)
+
+    return {
+        "gpu_temp": find("gpu", "temp", ""),
+        "gpu_util": find("gpu", "util"),
+        "gpu_power": find("gpu", "power"),
+        "cpu_temp": cpu_pkg,
+        "mem_pct": find("memory", "used_pct"),
+    }
+
+
+@dataclass
+class Summary:
+    start: float | None
+    end: float | None
+    samples: int
+    maxima: dict          # reading.key -> (value, unit, ts)
+    events: list          # [(ts, kind, detail), ...]
+    last: list            # [Sample, ...] most recent
+
+
+def summarize(path, last_n: int = 10) -> Summary:
+    start = end = None
+    count = 0
+    maxima: dict = {}
+    events: list = []
+    recent: deque = deque(maxlen=last_n)
+
+    for rec in iter_records(path):
+        ts = rec.get("ts")
+        if "event" in rec:
+            events.append((ts, rec.get("event", ""), rec.get("detail", "")))
+            continue
+        if "readings" not in rec:
+            continue
+        count += 1
+        if start is None:
+            start = ts
+        end = ts
+        sample = record_to_sample(rec)
+        recent.append(sample)
+        for r in sample.readings:
+            if r.value is None:
+                continue
+            current = maxima.get(r.key)
+            if current is None or r.value > current[0]:
+                maxima[r.key] = (r.value, r.unit, ts)
+
+    return Summary(start, end, count, maxima, events, list(recent))

src/rigdoctor/core/elevation.py

@@ -0,0 +1,51 @@
+"""Session privilege elevation.
+
+At GUI launch the app asks for the password once (pkexec) and collects the data that
+needs root — SMART health + dmidecode (board/BIOS/RAM) — caching it for the session so
+Health and Inventory can always show the full picture without per-action prompts.
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import shutil
+import subprocess
+import sys
+
+_privileged: dict | None = None
+
+
+def privileged() -> dict | None:
+    """Cached root-collected data ({"smart": [...], "dmidecode": {...}}), or None."""
+    return _privileged
+
+
+def set_privileged(data: dict | None) -> None:
+    global _privileged
+    _privileged = data
+
+
+def available() -> bool:
+    return shutil.which("pkexec") is not None and os.geteuid() != 0
+
+
+def _cli() -> list[str]:
+    candidate = os.path.join(os.path.dirname(sys.executable), "rigdoctor")
+    return [candidate] if os.path.exists(candidate) else [sys.executable, "-m", "rigdoctor"]
+
+
+def collect_via_pkexec(timeout: float = 120.0) -> dict | None:
+    """Run one elevated collection (single password prompt). None if unavailable/cancelled."""
+    if not available():
+        return None
+    try:
+        proc = subprocess.run(
+            ["pkexec", *_cli(), "collect-priv"],
+            capture_output=True, text=True, timeout=timeout,
+        )
+        if proc.returncode == 0 and proc.stdout.strip():
+            return json.loads(proc.stdout)
+    except (subprocess.SubprocessError, OSError, ValueError):
+        pass
+    return None

src/rigdoctor/core/health.py

@@ -0,0 +1,255 @@
+"""Health report (M4): scan kernel logs + SMART + driver/library state into a
+prioritized, plain-language findings list with suggested fixes (read-only, D9).
+
+Stdlib-only. Every check degrades gracefully — a missing tool/permission yields an
+info finding, never an exception.
+"""
+
+from __future__ import annotations
+
+import re
+import shutil
+import subprocess
+from dataclasses import dataclass
+from pathlib import Path
+
+CRITICAL = "critical"
+WARNING = "warning"
+INFO = "info"
+OK = "ok"
+_ORDER = {CRITICAL: 0, WARNING: 1, INFO: 2, OK: 3}
+
+
+@dataclass
+class Finding:
+    severity: str   # critical | warning | info | ok
+    category: str   # GPU, Kernel, Memory, Storage, Thermal, Driver, PCIe, Logs
+    title: str
+    detail: str = ""
+    suggestion: str = ""
+
+
+# --- NVIDIA Xid knowledge (the seed crash is Xid 79) --------------------------
+_XID_INFO: dict[int, tuple[str, str]] = {
+    13: (WARNING, "Graphics engine exception (often an app/driver bug or unstable overclock)"),
+    31: (WARNING, "GPU memory page fault (usually a driver or application bug)"),
+    43: (WARNING, "GPU stopped processing a task (application error)"),
+    45: (INFO, "Preemptive channel removal (often a side-effect of another error or a reboot)"),
+    48: (CRITICAL, "Double-bit ECC error — VRAM hardware fault"),
+    62: (CRITICAL, "Internal microcontroller halt (often follows instability)"),
+    79: (CRITICAL, "GPU has fallen off the bus — hardware: power delivery, PCIe link, or thermals"),
+    94: (CRITICAL, "Contained ECC error"),
+    95: (CRITICAL, "Uncontained ECC error"),
+    119: (CRITICAL, "GSP RPC timeout — GPU System Processor hang"),
+    120: (CRITICAL, "GSP error — GPU System Processor fault"),
+}
+_XID_SUGGEST: dict[int, str] = {
+    79: "Check PSU/power cables and reseat the GPU/riser; test a lower power limit "
+        "(`sudo nvidia-smi -pl <watts>`) and capture a session with `rigdoctor record`.",
+    48: "Persistent VRAM ECC errors mean failing memory — RMA the card if it recurs.",
+    119: "GSP hangs are often driver-version specific — try a different driver branch.",
+    120: "GSP errors are often driver-version specific — try a different driver branch.",
+}
+_XID_RE = re.compile(r"Xid(?:\s*\([^)]*\))?:?\s*(\d+)")
+
+
+def scan_journal_text(text: str) -> list[Finding]:
+    """Parse kernel-log text into findings (separated from IO so it's testable)."""
+    lines = text.splitlines()
+    findings: list[Finding] = []
+
+    xids: dict[int, int] = {}
+    for line in lines:
+        if "Xid" in line:
+            m = _XID_RE.search(line)
+            if m:
+                code = int(m.group(1))
+                xids[code] = xids.get(code, 0) + 1
+    for code in sorted(xids):
+        severity, desc = _XID_INFO.get(code, (WARNING, f"NVIDIA GPU error (Xid {code})"))
+        suggest = _XID_SUGGEST.get(code, "Look up this Xid code in NVIDIA's Xid error documentation.")
+        findings.append(Finding(severity, "GPU", f"NVIDIA Xid {code} ×{xids[code]}", desc, suggest))
+
+    oom = sum(1 for ln in lines if "Out of memory" in ln or "oom-kill" in ln or "oom_reaper" in ln)
+    if oom:
+        findings.append(Finding(
+            WARNING, "Memory", f"Out-of-memory kills ×{oom}",
+            "The kernel killed processes to reclaim RAM.",
+            "Close memory-heavy apps, add zram/swap, or investigate a leak.",
+        ))
+
+    if any("Kernel panic" in ln for ln in lines):
+        findings.append(Finding(
+            CRITICAL, "Kernel", "Kernel panic recorded",
+            "The kernel hit an unrecoverable error.",
+            "Note the panic message; review recent driver/kernel updates and hardware.",
+        ))
+
+    if any("mce:" in ln or "Machine check" in ln or "Hardware Error" in ln for ln in lines):
+        findings.append(Finding(
+            CRITICAL, "Hardware", "Machine Check Exception (MCE)",
+            "The CPU reported a hardware error.",
+            "Run memtest86 for RAM, check CPU temps/voltages, and review the MCE detail.",
+        ))
+
+    if any("AER:" in ln or "PCIe Bus Error" in ln or ("pcieport" in ln and "error" in ln.lower()) for ln in lines):
+        findings.append(Finding(
+            WARNING, "PCIe", "PCIe bus errors (AER)",
+            "Correctable/uncorrectable PCIe errors were logged.",
+            "Reseat the device and check risers/cabling; AER storms can precede a GPU drop.",
+        ))
+
+    low = [ln.lower() for ln in lines]
+    if any(("thermal" in ln and ("critical" in ln or "throttl" in ln)) or "temperature above threshold" in ln for ln in low):
+        findings.append(Finding(
+            WARNING, "Thermal", "Thermal events logged",
+            "The system logged thermal throttling / critical-temperature events.",
+            "Improve airflow/cooling and check fan curves; watch live temps on the dashboard.",
+        ))
+
+    if any("amdgpu" in ln and "reset" in ln for ln in low):
+        findings.append(Finding(
+            CRITICAL, "GPU", "AMD GPU reset (amdgpu)",
+            "The AMD GPU was reset after a hang.",
+            "Check power/thermals/driver; capture a session with `rigdoctor record`.",
+        ))
+
+    return findings
+
+
+def _journalctl(args: list[str]) -> str | None:
+    if shutil.which("journalctl") is None:
+        return None
+    try:
+        proc = subprocess.run(["journalctl", *args], capture_output=True, text=True, timeout=25)
+        return proc.stdout
+    except (subprocess.SubprocessError, OSError):
+        return None
+
+
+def check_journal() -> list[Finding]:
+    out = _journalctl(["-k", "--no-pager", "-o", "cat", "--since", "-7 days"])
+    if out is None:
+        return [Finding(
+            INFO, "Logs", "Couldn't read the kernel journal",
+            "journalctl is unavailable or not readable.",
+            "Ensure systemd/journald is present and your user is in the 'systemd-journal' or 'adm' group.",
+        )]
+    findings = scan_journal_text(out)
+    if not findings:
+        findings.append(Finding(
+            OK, "Logs", "No notable kernel errors (last 7 days)",
+            "No Xid, panic, OOM, MCE, PCIe AER, or thermal events found.",
+        ))
+    return findings
+
+
+def check_journal_persistence() -> list[Finding]:
+    if Path("/var/log/journal").is_dir():
+        return []
+    return [Finding(
+        WARNING, "Logs", "journald isn't persistent across reboots",
+        "Crash-boot kernel logs are discarded on reboot, so a hard freeze's evidence can vanish.",
+        "Enable persistent logging: `sudo mkdir -p /var/log/journal && sudo systemctl restart systemd-journald`",
+    )]
+
+
+def check_nvidia_driver() -> list[Finding]:
+    if shutil.which("nvidia-smi") is None:
+        return []
+    try:
+        proc = subprocess.run(["nvidia-smi"], capture_output=True, text=True, timeout=10)
+    except (subprocess.SubprocessError, OSError):
+        return []
+    if "Driver/library version mismatch" in (proc.stdout + proc.stderr):
+        return [Finding(
+            CRITICAL, "Driver", "NVIDIA driver/library version mismatch",
+            "The loaded kernel module and the userspace NVIDIA libraries differ — GPU monitoring will fail until resolved.",
+            "Reboot to load the matching module (or finish the interrupted driver update).",
+        )]
+    return []
+
+
+def _smart_devices() -> list[str]:
+    try:
+        proc = subprocess.run(["smartctl", "--scan"], capture_output=True, text=True, timeout=10)
+    except (subprocess.SubprocessError, OSError):
+        return []
+    devices = []
+    for line in proc.stdout.splitlines():
+        line = line.strip()
+        if line.startswith("/dev/"):
+            devices.append(line.split()[0])
+    return devices
+
+
+def check_smart() -> list[Finding]:
+    if shutil.which("smartctl") is None:
+        return [Finding(
+            INFO, "Storage", "SMART not checked (smartmontools missing)",
+            "Disk self-health couldn't be read.",
+            "Install it for disk health checks: `sudo apt install smartmontools`",
+        )]
+    devices = _smart_devices()
+    if not devices:
+        return [Finding(
+            INFO, "Storage", "SMART: couldn't enumerate drives",
+            "Reading SMART usually needs root.",
+            "Run: `sudo rigdoctor report`",
+        )]
+    findings: list[Finding] = []
+    for dev in devices:
+        try:
+            proc = subprocess.run(["smartctl", "-H", dev], capture_output=True, text=True, timeout=15)
+        except (subprocess.SubprocessError, OSError):
+            continue
+        combined = proc.stdout + proc.stderr
+        if "Permission denied" in combined or "requires root" in combined.lower():
+            findings.append(Finding(INFO, "Storage", f"SMART for {dev} needs root", "", "Run: `sudo rigdoctor report`"))
+        elif "PASSED" in combined:
+            findings.append(Finding(OK, "Storage", f"SMART OK: {dev}", "Overall-health self-assessment passed."))
+        elif "FAILED" in combined or "FAILING_NOW" in combined:
+            findings.append(Finding(CRITICAL, "Storage", f"SMART FAILED: {dev}", "The drive reports failing health.", "Back up now and replace the drive."))
+    return findings
+
+
+def check_live_temps() -> list[Finding]:
+    from .sampler import Sampler
+    from .sources import available_sources
+
+    sample = Sampler(available_sources()).sample()
+    hot = [
+        (r.source, r.label or r.metric, r.value)
+        for r in sample.readings
+        if r.unit == "°C" and r.value is not None and r.value >= 90
+    ]
+    if not hot:
+        return []
+    worst = max(hot, key=lambda x: x[2])
+    detail = "; ".join(f"{s} {label} {v:.0f}°C" for s, label, v in hot)
+    return [Finding(
+        WARNING, "Thermal", f"High temperature right now ({worst[2]:.0f}°C)",
+        detail, "Check cooling/airflow and reduce load.",
+    )]
+
+
+def run_health_checks() -> list[Finding]:
+    """Run all checks and return findings sorted by severity (worst first).
+
+    SMART needs root; if the session collected it via launch elevation, use that
+    instead of re-running smartctl (which would just report "needs root").
+    """
+    from . import elevation
+
+    findings: list[Finding] = []
+    findings += check_nvidia_driver()
+    findings += check_journal()
+    findings += check_journal_persistence()
+    priv = elevation.privileged()
+    if priv is not None and priv.get("smart") is not None:
+        findings += [Finding(**d) for d in priv["smart"]]
+    else:
+        findings += check_smart()
+    findings += check_live_temps()
+    findings.sort(key=lambda f: _ORDER.get(f.severity, 9))
+    return findings

src/rigdoctor/core/installer.py

@@ -0,0 +1,58 @@
+"""Optional-dependency installer (M9): figure out what's missing and install it.
+
+apt-only (D15). Installs run via pkexec/sudo so a normal user gets a single auth
+prompt; nothing is installed without an explicit confirmation by the caller.
+"""
+
+from __future__ import annotations
+
+import os
+import shlex
+import shutil
+import subprocess
+from collections.abc import Callable
+
+from . import sysenv
+from .catalog import COMPONENTS, Component
+
+
+def component_status(present: Callable[[str], bool] | None = None) -> list[tuple[Component, bool]]:
+    """Pair each catalog component with whether it's installed (command present)."""
+    present = present or sysenv.has_command
+    return [(c, present(c.command)) for c in COMPONENTS]
+
+
+def missing_packages(components: list[Component]) -> list[str]:
+    """De-duplicated apt package list for the given components, order preserved."""
+    packages: list[str] = []
+    for component in components:
+        for pkg in component.apt:
+            if pkg not in packages:
+                packages.append(pkg)
+    return packages
+
+
+def apt_install_command(packages: list[str]) -> list[str]:
+    """Build an `apt-get update && install` command, elevated if we're not root."""
+    inner = "apt-get update && apt-get install -y " + " ".join(shlex.quote(p) for p in packages)
+    cmd = ["/bin/sh", "-c", inner]
+    if os.geteuid() == 0:
+        return cmd
+    if shutil.which("pkexec"):
+        return ["pkexec", *cmd]
+    if shutil.which("sudo"):
+        return ["sudo", *cmd]
+    return cmd  # no privilege escalation available — will likely fail, surfaced to the caller
+
+
+def install_packages(packages: list[str]) -> tuple[int, str]:
+    """Install the given packages. Returns (exit_code, combined_output)."""
+    if not packages:
+        return (0, "Nothing to install.")
+    try:
+        proc = subprocess.run(
+            apt_install_command(packages), capture_output=True, text=True, timeout=900
+        )
+        return (proc.returncode, proc.stdout + proc.stderr)
+    except (subprocess.SubprocessError, OSError) as exc:
+        return (1, str(exc))

src/rigdoctor/core/inventory.py

@@ -0,0 +1,206 @@
+"""System inventory (M5): collect hardware/OS details, exportable to Markdown/JSON.
+
+Stdlib + tools already used elsewhere (nvidia-smi, lspci, lsblk, dmidecode). Every
+probe degrades gracefully; board/BIOS/RAM-module details need dmidecode as root.
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import platform
+import shutil
+import subprocess
+from dataclasses import dataclass
+from pathlib import Path
+
+from .. import __version__
+from . import sysenv
+
+
+@dataclass
+class Section:
+    title: str
+    items: list[tuple[str, str]]
+
+
+def _run(cmd: list[str], timeout: float = 12.0) -> str:
+    try:
+        proc = subprocess.run(cmd, capture_output=True, text=True, timeout=timeout)
+        if proc.returncode == 0:
+            return proc.stdout
+    except (subprocess.SubprocessError, OSError):
+        pass
+    return ""
+
+
+def _system() -> Section:
+    u = os.uname()
+    return Section("System", [
+        ("Distro", sysenv.distro_name()),
+        ("Kernel", u.release),
+        ("Architecture", u.machine),
+        ("Hostname", u.nodename),
+        ("Python", platform.python_version()),
+        ("RigDoctor", __version__),
+    ])
+
+
+def _cpu() -> Section:
+    model = "?"
+    threads = 0
+    core_ids: set[tuple[str, str]] = set()
+    phys = "0"
+    try:
+        for line in Path("/proc/cpuinfo").read_text().splitlines():
+            if line.startswith("model name") and model == "?":
+                model = line.split(":", 1)[1].strip()
+            elif line.startswith("processor"):
+                threads += 1
+            elif line.startswith("physical id"):
+                phys = line.split(":", 1)[1].strip()
+            elif line.startswith("core id"):
+                core_ids.add((phys, line.split(":", 1)[1].strip()))
+    except OSError:
+        pass
+    items = [("Model", model)]
+    if core_ids:
+        items.append(("Cores", str(len(core_ids))))
+    items.append(("Threads", str(threads or os.cpu_count() or "?")))
+    return Section("CPU", items)
+
+
+def _firmware(dmi: dict) -> Section:
+    board = dmi.get("baseboard", {})
+    bios = dmi.get("bios", {})
+    items: list[tuple[str, str]] = []
+    if board:
+        items.append(("Motherboard", f"{board.get('Manufacturer', '')} {board.get('Product Name', '')}".strip()))
+    if bios:
+        items.append(("BIOS", f"{bios.get('Vendor', '')} {bios.get('Version', '')}".strip()))
+        if bios.get("Release Date"):
+            items.append(("BIOS date", bios["Release Date"]))
+    if not items:
+        items = [("Motherboard / BIOS", "run with admin (dmidecode needs root)")]
+    return Section("Firmware", items)
+
+
+def _memory(dmi: dict) -> Section:
+    items: list[tuple[str, str]] = []
+    try:
+        for line in Path("/proc/meminfo").read_text().splitlines():
+            if line.startswith("MemTotal"):
+                items.append(("Total", f"{int(line.split()[1]) / 1024 / 1024:.1f} GB"))
+                break
+    except (OSError, ValueError, IndexError):
+        pass
+    modules = dmi.get("memory", [])
+    if modules:
+        items.append(("Modules", str(len(modules))))
+        for i, m in enumerate(modules):
+            desc = " · ".join(p for p in (m.get("Size"), m.get("Type"), m.get("Speed"), m.get("Part Number")) if p)
+            items.append((f"Slot {i}", desc))
+    elif shutil.which("dmidecode"):
+        items.append(("Modules", "run with admin for module details"))
+    return Section("Memory", items)
+
+
+def _gpu() -> Section:
+    if shutil.which("nvidia-smi"):
+        out = _run([
+            "nvidia-smi",
+            "--query-gpu=name,driver_version,vbios_version,memory.total,pcie.link.gen.max,pcie.link.width.max",
+            "--format=csv,noheader",
+        ])
+        line = out.strip().splitlines()[0] if out.strip() else ""
+        if line:
+            cols = [c.strip() for c in line.split(",")]
+            keys = ["Name", "Driver", "VBIOS", "VRAM", "PCIe gen (max)", "PCIe width (max)"]
+            return Section("GPU", list(zip(keys, cols)))
+    out = _run(["lspci"])
+    gpus = [ln.split(":", 2)[-1].strip() for ln in out.splitlines()
+            if "VGA compatible controller" in ln or "3D controller" in ln]
+    return Section("GPU", [("Device", g) for g in gpus] or [("Device", "unknown")])
+
+
+def _storage() -> Section:
+    items: list[tuple[str, str]] = []
+    # TYPE first so MODEL (which can contain spaces) is the trailing field.
+    out = _run(["lsblk", "-dn", "-o", "TYPE,NAME,SIZE,MODEL"])
+    for line in out.strip().splitlines():
+        parts = line.split(None, 3)
+        if len(parts) < 3 or parts[0] != "disk":  # skip loop/zram/rom devices
+            continue
+        name, size = parts[1], parts[2]
+        model = parts[3] if len(parts) > 3 else ""
+        items.append((name, f"{model} ({size})".strip()))
+    return Section("Storage", items or [("Disks", "unknown")])
+
+
+def _display() -> Section:
+    return Section("Display", [
+        ("Session", os.environ.get("XDG_SESSION_TYPE", "unknown")),
+        ("Desktop", os.environ.get("XDG_CURRENT_DESKTOP") or os.environ.get("DESKTOP_SESSION", "unknown")),
+    ])
+
+
+def _dmidecode() -> dict:
+    if not shutil.which("dmidecode"):
+        return {}
+    out = _run(["dmidecode", "-t", "baseboard", "-t", "bios", "-t", "memory"], timeout=15)
+    if not out.strip():
+        return {}
+    result: dict = {"baseboard": {}, "bios": {}, "memory": []}
+    for block in out.split("Handle "):
+        lines = block.splitlines()
+        if len(lines) < 2:
+            continue
+        title = lines[1].strip()
+        kv: dict[str, str] = {}
+        for ln in lines[2:]:
+            if ln.startswith("\t") and ":" in ln:
+                key, _, value = ln.strip().partition(":")
+                kv[key.strip()] = value.strip()
+        if title == "Base Board Information":
+            result["baseboard"] = kv
+        elif title == "BIOS Information":
+            result["bios"] = kv
+        elif title == "Memory Device" and kv.get("Size") and kv["Size"] != "No Module Installed":
+            result["memory"].append(kv)
+    return result
+
+
+def collect() -> list[Section]:
+    from . import elevation
+
+    priv = elevation.privileged()
+    dmi = priv["dmidecode"] if (priv and priv.get("dmidecode") is not None) else _dmidecode()
+    return [_system(), _cpu(), _firmware(dmi), _memory(dmi), _gpu(), _storage(), _display()]
+
+
+def to_dict(sections: list[Section]) -> dict:
+    return {s.title: dict(s.items) for s in sections}
+
+
+def from_dict(data: dict) -> list[Section]:
+    return [Section(title, list(items.items())) for title, items in data.items()]
+
+
+def render_markdown(sections: list[Section]) -> str:
+    out = ["# RigDoctor system inventory", ""]
+    for s in sections:
+        out.append(f"## {s.title}")
+        out += [f"- **{k}:** {v}" for k, v in s.items]
+        out.append("")
+    return "\n".join(out).strip() + "\n"
+
+
+def render_text(sections: list[Section]) -> str:
+    blocks = []
+    for s in sections:
+        blocks.append("\n".join([s.title] + [f"  {k:<18} {v}" for k, v in s.items]))
+    return "\n\n".join(blocks)
+
+
+def render_json(sections: list[Section]) -> str:
+    return json.dumps(to_dict(sections), indent=2, ensure_ascii=False)

src/rigdoctor/core/pty_session.py

@@ -0,0 +1,59 @@
+"""A pseudo-terminal running the host's shell (M12, Tier 3 — host side).
+
+Spawns the user's login shell in a real PTY so interactive programs work over a shared
+session: vim, top, tab-completion, colours, Ctrl-C, and `sudo` (which prompts inside the
+PTY — the host types that password locally, so it's never sent to the guest). Runs as the
+host's own user — never elevated. Linux-only (uses `pty`/`termios`).
+"""
+
+from __future__ import annotations
+
+import fcntl
+import os
+import pty
+import signal
+import struct
+import termios
+
+
+class PtySession:
+    def __init__(self, rows: int = 24, cols: int = 80):
+        self.pid, self.master_fd = pty.fork()
+        if self.pid == 0:  # child: become the shell
+            os.environ["TERM"] = "xterm-256color"
+            shell = os.environ.get("SHELL", "/bin/bash")
+            try:
+                os.execvp(shell, [shell])
+            finally:
+                os._exit(1)
+        os.set_blocking(self.master_fd, False)
+        self.set_size(rows, cols)
+
+    def set_size(self, rows: int, cols: int) -> None:
+        try:
+            fcntl.ioctl(self.master_fd, termios.TIOCSWINSZ, struct.pack("HHHH", rows, cols, 0, 0))
+        except OSError:
+            pass
+
+    def write(self, data: bytes) -> None:
+        try:
+            os.write(self.master_fd, data)
+        except OSError:
+            pass
+
+    def read(self, size: int = 65536) -> bytes:
+        try:
+            return os.read(self.master_fd, size)
+        except (BlockingIOError, OSError):
+            return b""
+
+    def close(self) -> None:
+        try:
+            os.close(self.master_fd)
+        except OSError:
+            pass
+        try:
+            os.kill(self.pid, signal.SIGHUP)
+            os.waitpid(self.pid, os.WNOHANG)
+        except (OSError, ChildProcessError, ProcessLookupError):
+            pass

src/rigdoctor/core/reccontrol.py

@@ -0,0 +1,71 @@
+"""Background-process control for the crash-capture recorder (shared by CLI + GUI).
+
+Both front-ends start/stop/inspect the same `systemd`-style detached recorder via the
+PID and status files, so behaviour is identical however you drive it.
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import signal
+import subprocess
+import sys
+
+from .. import config
+
+
+def pid_alive(pid: int) -> bool:
+    try:
+        os.kill(pid, 0)
+    except OSError:
+        return False
+    return True
+
+
+def running_pid() -> int | None:
+    try:
+        pid = int(config.PID_FILE.read_text().strip())
+    except (OSError, ValueError):
+        return None
+    return pid if pid_alive(pid) else None
+
+
+def read_status() -> dict | None:
+    try:
+        return json.loads(config.STATUS_FILE.read_text())
+    except (OSError, ValueError):
+        return None
+
+
+def start_background(interval: float | None = None, out: str | None = None) -> int | None:
+    """Spawn a detached `record run`. Returns the child pid, or None if already running."""
+    if running_pid():
+        return None
+    config.STATE_DIR.mkdir(parents=True, exist_ok=True)
+    cmd = [sys.executable, "-m", "rigdoctor", "record", "run"]
+    if interval:
+        cmd += ["--interval", str(interval)]
+    if out:
+        cmd += ["--out", out]
+    out_fh = open(config.SPAWN_LOG, "a")
+    proc = subprocess.Popen(
+        cmd,
+        stdout=out_fh,
+        stderr=subprocess.STDOUT,
+        stdin=subprocess.DEVNULL,
+        start_new_session=True,
+    )
+    return proc.pid
+
+
+def stop_background() -> bool:
+    """Signal the running recorder to stop. Returns False if it wasn't running."""
+    pid = running_pid()
+    if not pid:
+        return False
+    try:
+        os.kill(pid, signal.SIGTERM)
+    except OSError:
+        return False
+    return True

src/rigdoctor/core/recorder.py

@@ -0,0 +1,93 @@
+"""Crash-capture recorder (M3): the sampling loop that writes a crash-safe log.
+
+Runs in the foreground (so it works as a `systemd --user` ExecStart and under
+manual `record run`). Stop it by calling stop() — typically from a SIGTERM/SIGINT
+handler installed by the CLI.
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import threading
+import time
+from pathlib import Path
+
+from .crashlog import CrashLogWriter, headline
+from .sampler import Sampler
+from .sources import available_sources
+
+
+class Recorder:
+    def __init__(
+        self,
+        interval: float,
+        log_path,
+        max_bytes: int = 20_000_000,
+        backups: int = 10,
+        status_path=None,
+        sampler: Sampler | None = None,
+    ) -> None:
+        self.interval = interval
+        self.sampler = sampler or Sampler(available_sources())
+        self.writer = CrashLogWriter(log_path, max_bytes, backups)
+        self.log_path = Path(log_path)
+        self.status_path = Path(status_path) if status_path else None
+        self.samples = 0
+        self._stop = threading.Event()
+        self._gpu_lost = False
+        self._started = time.time()
+
+    def stop(self) -> None:
+        self._stop.set()
+
+    def run(self) -> None:
+        self.writer.write_event("session-start", f"interval={self.interval:g}s")
+        self._write_status(running=True)
+        try:
+            while not self._stop.is_set():
+                t0 = time.monotonic()
+                sample = self.sampler.sample()
+                self.writer.write_sample(sample)
+                self.samples += 1
+                self._detect_gpu_lost(sample)
+                self._write_status(running=True, sample=sample)
+                self._stop.wait(max(0.0, self.interval - (time.monotonic() - t0)))
+        finally:
+            self.writer.write_event("session-stop", f"samples={self.samples}")
+            self.writer.close()
+            self._write_status(running=False)
+
+    def _detect_gpu_lost(self, sample) -> None:
+        lost = any(
+            r.source == "gpu" and r.metric == "status" and r.label == "query-timeout"
+            for r in sample.readings
+        )
+        if lost and not self._gpu_lost:
+            self._gpu_lost = True
+            self.writer.write_event("gpu-lost", "nvidia-smi query timed out — GPU may be hung/lost")
+        elif not lost and self._gpu_lost:
+            self._gpu_lost = False
+            self.writer.write_event("gpu-recovered", "GPU responding again")
+
+    def _write_status(self, running: bool, sample=None) -> None:
+        if self.status_path is None:
+            return
+        data = {
+            "running": running,
+            "pid": os.getpid(),
+            "log": str(self.log_path),
+            "started": self._started,
+            "samples": self.samples,
+            "updated": time.time(),
+            "gpu_lost": self._gpu_lost,
+        }
+        if sample is not None:
+            data["latest"] = headline(sample)
+        try:
+            self.status_path.parent.mkdir(parents=True, exist_ok=True)
+            tmp = self.status_path.with_suffix(self.status_path.suffix + ".tmp")
+            tmp.write_text(json.dumps(data))
+            tmp.replace(self.status_path)  # atomic
+        except OSError:
+            pass

src/rigdoctor/core/share.py

@@ -0,0 +1,194 @@
+"""Session sharing (M12, Tier 2): a read-only live view over a local HTTP server.
+
+Serves the live sensor snapshot + health report + inventory, **read-only**, gated by a
+random share token. Bind to localhost for local testing, or to all interfaces behind a
+user-chosen tunnel (Tailscale / cloudflared / SSH) for remote help. No actions, no terminal.
+"""
+
+from __future__ import annotations
+
+import json
+import secrets
+from dataclasses import asdict
+from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
+from urllib.parse import parse_qs, urlparse
+
+from .sampler import Sampler
+from .sources import available_sources
+
+_PAGE = """<!doctype html>
+<html><head><meta charset="utf-8"><title>RigDoctor — shared</title>
+<style>
+ body{background:#101216;color:#e6e8eb;font-family:system-ui,sans-serif;margin:0;padding:24px}
+ h1{font-size:20px;margin:0 0 4px} h2{font-size:14px;color:#8b929c;margin:18px 0 6px}
+ .card{background:#1b1f26;border:1px solid #2a2f39;border-radius:12px;padding:16px;margin:14px 0}
+ table{width:100%;border-collapse:collapse} td{padding:3px 0;font-size:14px}
+ td.v{text-align:right;font-weight:600} .muted{color:#8b929c}
+ .critical{color:#f87171} .warning{color:#fb923c} .ok{color:#4ade80} .info{color:#8b929c}
+ .badge{display:inline-block;background:#38bdf8;color:#06222e;border-radius:6px;padding:1px 8px;font-size:12px;font-weight:700}
+</style></head><body>
+ <h1>RigDoctor <span class="badge">read-only share</span></h1>
+ <p class="muted">A live view shared by the machine's owner. You can look, not change anything.</p>
+ <div class="card"><div id="live">loading…</div></div>
+ <div class="card"><h2 style="margin-top:0">Health</h2><div id="health">loading…</div></div>
+ <div class="card"><h2 style="margin-top:0">Inventory</h2><div id="inv">loading…</div></div>
+<script>
+ const T=new URLSearchParams(location.search).get('t');
+ const j=async p=>(await fetch(p+'?t='+encodeURIComponent(T))).json();
+ const fmt=(v,u)=>v==null?'N/A':(u==='\\u00b0C'?(+v).toFixed(1)+' °C':(u?v+' '+u:v));
+ async function live(){try{const d=await j('/api/snapshot');let h='';
+  for(const[g,items]of Object.entries(d.groups)){h+='<h2>'+g.toUpperCase()+'</h2><table>';
+   for(const it of items)h+='<tr><td class="muted">'+it.name+'</td><td class="v">'+fmt(it.value,it.unit)+'</td></tr>';
+   h+='</table>';}document.getElementById('live').innerHTML=h;}catch(e){}}
+ async function once(){try{const r=await j('/api/report');
+   document.getElementById('health').innerHTML=r.map(f=>'<div><span class="'+f.severity+'">['+f.severity.toUpperCase()+']</span> '+f.category+': '+f.title+'</div>').join('')||'no findings';}catch(e){}
+  try{const inv=await j('/api/inventory');let h='';
+   for(const[s,kv]of Object.entries(inv)){h+='<h2>'+s+'</h2><table>';
+    for(const[k,v]of Object.entries(kv))h+='<tr><td class="muted">'+k+'</td><td class="v">'+v+'</td></tr>';
+    h+='</table>';}document.getElementById('inv').innerHTML=h;}catch(e){}}
+ live();once();setInterval(live,2000);
+</script></body></html>"""
+
+
+def _snapshot(sampler: Sampler) -> dict:
+    sample = sampler.sample()
+    groups: dict[str, list] = {}
+    for r in sample.readings:
+        if r.metric == "name":
+            item = {"name": "device", "value": r.label, "unit": ""}
+        else:
+            item = {"name": (r.label + " " + r.metric).strip() if r.label else r.metric,
+                    "value": r.value, "unit": r.unit}
+        groups.setdefault(r.source, []).append(item)
+    return {"ts": sample.ts, "groups": groups}
+
+
+def _report() -> list:
+    from .health import run_health_checks
+    return [asdict(f) for f in run_health_checks()]
+
+
+def _inventory() -> dict:
+    from .inventory import collect, to_dict
+    return to_dict(collect())
+
+
+# --- Relay (M12) frames: a host streams these; a guest renders them. -----------------
+
+def host_full_frame(sampler: Sampler) -> str:
+    """Initial frame: live snapshot + health report + inventory."""
+    return json.dumps({"type": "full", "snapshot": _snapshot(sampler),
+                       "report": _report(), "inventory": _inventory()})
+
+
+def host_snapshot_frame(sampler: Sampler) -> str:
+    """Recurring frame: just the live snapshot."""
+    return json.dumps({"type": "snapshot", "snapshot": _snapshot(sampler)})
+
+
+def _fmt(value, unit: str) -> str:
+    if value is None:
+        return "N/A"
+    if unit == "°C":
+        try:
+            return f"{float(value):.1f} °C"
+        except (TypeError, ValueError):
+            return str(value)
+    return f"{value} {unit}".strip()
+
+
+def guest_html(snapshot: dict | None, report: list | None, inventory: dict | None) -> str:
+    """Render a received frame as read-only dark HTML for the guest's view."""
+    import html as _html
+
+    def esc(x) -> str:
+        return _html.escape(str(x))
+
+    out = ['<div style="font-family:sans-serif;color:#e6e8eb">']
+    if snapshot:
+        for group, items in snapshot.get("groups", {}).items():
+            out.append(f'<h3 style="color:#8b929c">{esc(group).upper()}</h3><table width="100%">')
+            for it in items:
+                out.append(f'<tr><td style="color:#8b929c">{esc(it.get("name"))}</td>'
+                           f'<td align="right"><b>{esc(_fmt(it.get("value"), it.get("unit", "")))}</b></td></tr>')
+            out.append("</table>")
+    if report:
+        out.append('<h3 style="color:#8b929c">HEALTH</h3>')
+        colors = {"critical": "#f87171", "warning": "#fb923c", "ok": "#4ade80"}
+        for f in report:
+            sev = f.get("severity", "info")
+            out.append(f'<div><span style="color:{colors.get(sev, "#8b929c")}">[{esc(sev).upper()}]</span> '
+                       f'{esc(f.get("category"))}: {esc(f.get("title"))}</div>')
+    if inventory:
+        out.append('<h3 style="color:#8b929c">INVENTORY</h3>')
+        for section, kv in inventory.items():
+            out.append(f'<h4 style="margin:6px 0;color:#8b929c">{esc(section)}</h4><table width="100%">')
+            for k, v in kv.items():
+                out.append(f'<tr><td style="color:#8b929c">{esc(k)}</td><td align="right"><b>{esc(v)}</b></td></tr>')
+            out.append("</table>")
+    out.append("</div>")
+    return "".join(out)
+
+
+class _Handler(BaseHTTPRequestHandler):
+    def log_message(self, *args):  # quiet
+        pass
+
+    def _authed(self, query: dict) -> bool:
+        return secrets.compare_digest(query.get("t", [""])[0], self.server.token)
+
+    def _send(self, code: int, ctype: str, body: bytes) -> None:
+        self.send_response(code)
+        self.send_header("Content-Type", ctype)
+        self.send_header("Content-Length", str(len(body)))
+        self.end_headers()
+        self.wfile.write(body)
+
+    def do_GET(self) -> None:  # noqa: N802
+        parsed = urlparse(self.path)
+        if not self._authed(parse_qs(parsed.query)):
+            self._send(403, "text/plain", b"Forbidden: missing or invalid share token")
+            return
+        if parsed.path == "/":
+            self._send(200, "text/html; charset=utf-8", _PAGE.encode())
+        elif parsed.path == "/api/snapshot":
+            self._send(200, "application/json", json.dumps(_snapshot(self.server.sampler)).encode())
+        elif parsed.path == "/api/report":
+            self._send(200, "application/json", json.dumps(_report()).encode())
+        elif parsed.path == "/api/inventory":
+            self._send(200, "application/json", json.dumps(_inventory()).encode())
+        else:
+            self._send(404, "text/plain", b"Not found")
+
+
+class _Server(ThreadingHTTPServer):
+    daemon_threads = True
+
+    def __init__(self, addr, token: str):
+        super().__init__(addr, _Handler)
+        self.token = token
+        self.sampler = Sampler(available_sources())
+
+
+def make_server(host: str = "127.0.0.1", port: int = 0, token: str | None = None) -> tuple[_Server, str]:
+    token = token or secrets.token_urlsafe(16)
+    return _Server((host, port), token), token
+
+
+def serve(host: str = "127.0.0.1", port: int = 8765) -> int:
+    srv, token = make_server(host, port)
+    url = f"http://{host}:{srv.server_address[1]}/?t={token}"
+    print(
+        f"Sharing a read-only live view at:\n  {url}\n\n"
+        "Anyone with this URL (and network access to this host) can VIEW your sensors,\n"
+        "health report, and inventory — read-only. For remote help, expose it via a tunnel\n"
+        "(Tailscale / cloudflared / `ssh -R`). Press Ctrl-C to stop sharing.",
+        flush=True,
+    )
+    try:
+        srv.serve_forever()
+    except KeyboardInterrupt:
+        print("\nStopped sharing.")
+    finally:
+        srv.shutdown()
+    return 0

src/rigdoctor/core/sysenv.py

@@ -0,0 +1,49 @@
+"""Environment detection for the installer (M9)."""
+
+from __future__ import annotations
+
+import shutil
+import subprocess
+
+
+def package_manager() -> str | None:
+    """Only apt is supported (D15); return 'apt' if present, else None."""
+    if shutil.which("apt-get") or shutil.which("apt"):
+        return "apt"
+    return None
+
+
+def has_command(cmd: str) -> bool:
+    return shutil.which(cmd) is not None
+
+
+def distro_name() -> str:
+    try:
+        data: dict[str, str] = {}
+        with open("/etc/os-release") as f:
+            for line in f:
+                key, _, value = line.partition("=")
+                data[key.strip()] = value.strip().strip('"')
+        return data.get("PRETTY_NAME") or data.get("NAME") or "Linux"
+    except OSError:
+        return "Linux"
+
+
+def gpu_vendors() -> list[str]:
+    vendors: list[str] = []
+    if shutil.which("nvidia-smi"):
+        vendors.append("NVIDIA")
+    out = ""
+    if shutil.which("lspci"):
+        try:
+            out = subprocess.run(["lspci"], capture_output=True, text=True, timeout=10).stdout
+        except (subprocess.SubprocessError, OSError):
+            out = ""
+    low = out.lower()
+    if "nvidia" in low and "NVIDIA" not in vendors:
+        vendors.append("NVIDIA")
+    if ("amd/ati" in low or "advanced micro devices" in low or "radeon" in low) and "AMD" not in vendors:
+        vendors.append("AMD")
+    if "intel" in low and any(k in low for k in ("vga", "display", "graphics")) and "Intel" not in vendors:
+        vendors.append("Intel")
+    return vendors

src/rigdoctor/core/uninstall.py

@@ -0,0 +1,42 @@
+"""Uninstall the user-local RigDoctor install (app files; optionally all data).
+
+Mirrors `install.sh --uninstall`. The removal runs in a detached shell so it can
+delete the venv the current process is running from once we exit.
+"""
+
+from __future__ import annotations
+
+import shlex
+import subprocess
+from pathlib import Path
+
+from .. import config
+from . import reccontrol
+
+
+def targets(purge: bool = False) -> list[Path]:
+    """Paths removed by an uninstall. With purge, also config/state/logs."""
+    home = Path.home()
+    share = config.DATA_DIR.parent  # ~/.local/share
+    items = [
+        config.DATA_DIR / "venv",
+        home / ".local" / "bin" / "rigdoctor",
+        home / ".local" / "bin" / "rigdoctor-gui",
+        share / "applications" / "rigdoctor.desktop",
+        share / "icons" / "hicolor" / "scalable" / "apps" / "rigdoctor.svg",
+    ]
+    if purge:
+        items += [config.CONFIG_DIR, config.STATE_DIR, config.DATA_DIR]
+    return items
+
+
+def uninstall(purge: bool = False) -> None:
+    """Stop the recorder, clear the token if purging, and remove the install."""
+    reccontrol.stop_background()
+    if purge:
+        config.clear_token()  # removes keyring entry + any file fallback
+    paths = " ".join(shlex.quote(str(p)) for p in targets(purge))
+    subprocess.Popen(
+        ["/bin/sh", "-c", f"sleep 1; rm -rf {paths}"],
+        start_new_session=True,
+    )

src/rigdoctor/core/updates.py

@@ -0,0 +1,119 @@
+"""Update check (M13): ask the Gitea releases API for the latest version + notes.
+
+Stdlib-only (urllib). The Gitea instance requires sign-in, so updates are gated to
+account holders via a Personal Access Token (D18): set $RIGDOCTOR_TOKEN or save one
+with `rigdoctor login`. Returns the latest tag, its release notes (body), and a clear
+state for the UI; `apply_update` performs the no-root self-update.
+"""
+
+from __future__ import annotations
+
+import json
+import subprocess
+import sys
+import urllib.error
+import urllib.request
+
+from .. import __version__
+from ..config import load_token
+
+GITEA_BASE = "https://git.jesseyvanofferen.com"
+REPO = "jessey/rigdoctor"
+LATEST_API = f"{GITEA_BASE}/api/v1/repos/{REPO}/releases/latest"
+RELEASES_PAGE = f"{GITEA_BASE}/{REPO}/releases"
+TOKEN_PAGE = f"{GITEA_BASE}/user/settings/applications"
+
+# Update states
+NO_TOKEN = "no-token"
+AUTH = "auth"
+NETWORK = "network"
+UP_TO_DATE = "up-to-date"
+AVAILABLE = "available"
+
+
+def _parse(version: str) -> tuple[int, ...]:
+    return tuple(int(p) for p in version.lstrip("vV").split(".") if p.isdigit())
+
+
+def is_newer(latest: str, current: str = __version__) -> bool:
+    try:
+        return _parse(latest) > _parse(current)
+    except (ValueError, AttributeError):
+        return False
+
+
+def fetch_latest(timeout: float = 5.0) -> tuple[str | None, str, str | None]:
+    """Return (tag, notes, error). error is NO_TOKEN/AUTH/NETWORK, or None on success."""
+    token = load_token()
+    if not token:
+        return (None, "", NO_TOKEN)
+    req = urllib.request.Request(
+        LATEST_API,
+        headers={"Accept": "application/json", "Authorization": f"token {token}"},
+    )
+    try:
+        with urllib.request.urlopen(req, timeout=timeout) as resp:  # noqa: S310 (https)
+            data = json.load(resp)
+        return (data.get("tag_name") or None, (data.get("body") or "").strip(), None)
+    except urllib.error.HTTPError as exc:
+        return (None, "", AUTH if exc.code in (401, 403) else NETWORK)
+    except Exception:
+        return (None, "", NETWORK)
+
+
+def check_latest(timeout: float = 5.0) -> str | None:
+    """Convenience: latest tag or None (ignores notes/error)."""
+    tag, _notes, _error = fetch_latest(timeout)
+    return tag
+
+
+def update_state(timeout: float = 5.0) -> tuple[str, str | None, str]:
+    """Return (state, tag, notes). state in NO_TOKEN/AUTH/NETWORK/UP_TO_DATE/AVAILABLE."""
+    tag, notes, error = fetch_latest(timeout)
+    if error:
+        return (error, None, "")
+    if tag and is_newer(tag):
+        return (AVAILABLE, tag, notes)
+    return (UP_TO_DATE, tag, notes)
+
+
+def list_releases(limit: int = 15, timeout: float = 6.0) -> tuple[list[tuple[str, str, str]], str | None]:
+    """Return ([(tag, date, notes), …], error) for the in-app changelog."""
+    token = load_token()
+    if not token:
+        return ([], NO_TOKEN)
+    req = urllib.request.Request(
+        f"{GITEA_BASE}/api/v1/repos/{REPO}/releases?limit={limit}",
+        headers={"Accept": "application/json", "Authorization": f"token {token}"},
+    )
+    try:
+        with urllib.request.urlopen(req, timeout=timeout) as resp:  # noqa: S310 (https)
+            data = json.load(resp)
+        return ([
+            (r.get("tag_name") or "?", (r.get("published_at") or "")[:10], (r.get("body") or "").strip())
+            for r in data
+        ], None)
+    except urllib.error.HTTPError as exc:
+        return ([], AUTH if exc.code in (401, 403) else NETWORK)
+    except Exception:
+        return ([], NETWORK)
+
+
+def apply_update(tag: str) -> tuple[int, str]:
+    """Self-update the current (user-local) install to `tag` via authenticated pip.
+
+    Installs `rigdoctor[gui] @ git+https://oauth2:<token>@…/rigdoctor.git@<tag>` into
+    the running environment. Returns (exit_code, output) with the token scrubbed.
+    """
+    token = load_token()
+    if not token:
+        return (1, "No update token configured. Run `rigdoctor login`.")
+    host = GITEA_BASE.split("://", 1)[1]
+    ref = f"rigdoctor[gui] @ git+https://oauth2:{token}@{host}/{REPO}.git@{tag}"
+    cmd = [sys.executable, "-m", "pip", "install", "--upgrade", ref]
+    try:
+        proc = subprocess.run(cmd, capture_output=True, text=True, timeout=1800)
+        out = (proc.stdout + proc.stderr).replace(token, "***")
+        return (proc.returncode, out)
+    except (subprocess.SubprocessError, OSError) as exc:
+        return (1, str(exc).replace(token, "***"))

src/rigdoctor/gui/app.py

@@ -3,18 +3,28 @@
 from __future__ import annotations
 
 import sys
+from pathlib import Path
 
+from PySide6.QtGui import QIcon
 from PySide6.QtWidgets import QApplication
 
 from ..config import load_config
+from . import desktop
 from .main_window import MainWindow
 from .theme import STYLESHEET
 
+ICON = Path(__file__).parent / "assets" / "rigdoctor.svg"
+
 
 def main(argv: list[str] | None = None) -> int:
+    desktop.ensure()  # self-register icon + .desktop so updates show it without re-installing
     app = QApplication(argv if argv is not None else sys.argv)
     app.setApplicationName("RigDoctor")
     app.setApplicationDisplayName("RigDoctor")
+    # Match the installed rigdoctor.desktop so the dock/launcher shows our icon (Wayland app-id).
+    app.setDesktopFileName("rigdoctor")
+    if ICON.exists():
+        app.setWindowIcon(QIcon(str(ICON)))
     app.setStyle("Fusion")
     app.setStyleSheet(STYLESHEET)
 

src/rigdoctor/gui/assets/check.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <path d="M3.5 8.5 L6.5 11.5 L12.5 4.5" fill="none" stroke="#06222e"
+        stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

src/rigdoctor/gui/assets/rigdoctor.svg

@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="256" height="256" viewBox="0 0 256 256">
+  <rect x="8" y="8" width="240" height="240" rx="52" fill="#15181e"/>
+  <circle cx="128" cy="128" r="84" fill="none" stroke="#2a2f39" stroke-width="14"/>
+  <path d="M128 44 a84 84 0 1 1 -59.4 24.6" fill="none" stroke="#38bdf8"
+        stroke-width="14" stroke-linecap="round"/>
+  <path d="M60 132 H100 L116 96 L140 168 L156 132 H196" fill="none" stroke="#e6e8eb"
+        stroke-width="14" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

src/rigdoctor/gui/desktop.py

@@ -0,0 +1,51 @@
+"""Best-effort desktop integration: install our icon + .desktop so the dock shows it.
+
+Runs at GUI launch (idempotent), so a self-update + relaunch refreshes the icon without
+re-running install.sh. No-op for non-installed (dev) runs where the launcher is absent.
+"""
+
+from __future__ import annotations
+
+import shutil
+import sys
+from pathlib import Path
+
+from .. import config
+
+_ICON_SRC = Path(__file__).parent / "assets" / "rigdoctor.svg"
+
+_DESKTOP = """[Desktop Entry]
+Type=Application
+Name=RigDoctor
+Comment=Hardware monitoring & crash diagnostics for Linux gamers
+Exec={exec}
+Icon=rigdoctor
+Terminal=false
+Categories=System;Monitor;Utility;
+StartupWMClass=rigdoctor
+"""
+
+
+def ensure() -> None:
+    share = config.DATA_DIR.parent  # ~/.local/share
+
+    try:
+        if _ICON_SRC.exists():
+            icon_dst = share / "icons" / "hicolor" / "scalable" / "apps" / "rigdoctor.svg"
+            icon_dst.parent.mkdir(parents=True, exist_ok=True)
+            if not icon_dst.exists() or icon_dst.read_bytes() != _ICON_SRC.read_bytes():
+                shutil.copyfile(_ICON_SRC, icon_dst)
+    except OSError:
+        pass
+
+    gui_exec = Path(sys.executable).with_name("rigdoctor-gui")
+    if not gui_exec.exists():  # dev / not a normal install — don't fabricate a .desktop
+        return
+    try:
+        desktop = share / "applications" / "rigdoctor.desktop"
+        content = _DESKTOP.format(exec=gui_exec)
+        desktop.parent.mkdir(parents=True, exist_ok=True)
+        if not desktop.exists() or desktop.read_text() != content:
+            desktop.write_text(content)
+    except OSError:
+        pass

src/rigdoctor/gui/health_page.py

@@ -0,0 +1,129 @@
+"""Health page (M4 in the GUI): runs the health checks and shows findings as cards."""
+
+from __future__ import annotations
+
+import threading
+import time
+
+from PySide6.QtCore import Qt, QTimer, Signal
+from PySide6.QtWidgets import (
+    QFrame,
+    QHBoxLayout,
+    QLabel,
+    QPushButton,
+    QScrollArea,
+    QVBoxLayout,
+    QWidget,
+)
+
+from .theme import ACCENT, CRIT, GOOD, MUTED, WARN
+
+_SEV = {
+    "critical": ("CRITICAL", CRIT),
+    "warning": ("WARNING", WARN),
+    "info": ("INFO", MUTED),
+    "ok": ("OK", GOOD),
+}
+
+
+def _finding_widget(finding) -> QFrame:
+    label, color = _SEV.get(finding.severity, ("?", MUTED))
+    card = QFrame()
+    card.setObjectName("Card")
+    v = QVBoxLayout(card)
+    v.setContentsMargins(16, 12, 16, 12)
+    v.setSpacing(4)
+
+    head = QLabel(f"{label}  ·  {finding.category}: {finding.title}")
+    head.setStyleSheet(f"color: {color}; font-weight: 700; background: transparent;")
+    head.setWordWrap(True)
+    v.addWidget(head)
+
+    if finding.detail:
+        detail = QLabel(finding.detail)
+        detail.setObjectName("Muted")
+        detail.setWordWrap(True)
+        v.addWidget(detail)
+    if finding.suggestion:
+        suggestion = QLabel(f"→ {finding.suggestion}")
+        suggestion.setStyleSheet(f"color: {ACCENT}; background: transparent;")
+        suggestion.setWordWrap(True)
+        v.addWidget(suggestion)
+    return card
+
+
+class HealthPage(QWidget):
+    _result = Signal(object)  # list[Finding]
+
+    def __init__(self) -> None:
+        super().__init__()
+        self.setObjectName("Page")
+        self._result.connect(self._render_findings)
+
+        root = QVBoxLayout(self)
+        root.setContentsMargins(20, 18, 20, 18)
+        root.setSpacing(16)
+
+        header = QHBoxLayout()
+        title = QLabel("Health")
+        title.setObjectName("PageTitle")
+        header.addWidget(title)
+        header.addStretch(1)
+        self._status = QLabel("")
+        self._status.setObjectName("Muted")
+        header.addWidget(self._status)
+        self._run_btn = QPushButton("Run health report")
+        self._run_btn.setObjectName("PrimaryButton")
+        self._run_btn.clicked.connect(self._run)
+        header.addWidget(self._run_btn)
+        root.addLayout(header)
+
+        scroll = QScrollArea()
+        scroll.setWidgetResizable(True)
+        scroll.setFrameShape(QFrame.Shape.NoFrame)
+        scroll.setStyleSheet("background: transparent;")
+        self._container = QWidget()
+        self._list = QVBoxLayout(self._container)
+        self._list.setContentsMargins(0, 0, 0, 0)
+        self._list.setSpacing(10)
+        self._list.setAlignment(Qt.AlignmentFlag.AlignTop)
+        scroll.setWidget(self._container)
+        root.addWidget(scroll, 1)
+
+        QTimer.singleShot(300, self._run)  # auto-run shortly after the window opens
+
+    def _run(self) -> None:
+        self._run_btn.setEnabled(False)
+        self._status.setText("Scanning logs, SMART, and driver…")
+        threading.Thread(target=self._work, daemon=True).start()
+
+    def _work(self) -> None:
+        from ..core.health import run_health_checks
+
+        try:
+            findings = run_health_checks()
+        except Exception:
+            findings = []
+        self._result.emit(findings)
+
+    def _render_findings(self, findings) -> None:
+        self._run_btn.setEnabled(True)
+        if findings is None:  # collection failed — keep current results
+            self._status.setText("check failed")
+            return
+
+        while self._list.count():
+            item = self._list.takeAt(0)
+            w = item.widget()
+            if w is not None:
+                w.deleteLater()
+
+        crit = sum(1 for f in findings if f.severity == "critical")
+        warn = sum(1 for f in findings if f.severity == "warning")
+        self._status.setText(
+            f"{crit} critical · {warn} warning · {len(findings)} checks  ·  "
+            f"{time.strftime('%H:%M:%S')}"
+        )
+        for finding in findings:
+            self._list.addWidget(_finding_widget(finding))
+        self._list.addStretch(1)

src/rigdoctor/gui/main_window.py

@@ -2,36 +2,54 @@
 
 from __future__ import annotations
 
-from PySide6.QtCore import Qt
+import os
+import sys
+import threading
+
+from PySide6.QtCore import Qt, QProcess, QTimer, Signal
+from PySide6.QtGui import QTextDocument
 from PySide6.QtWidgets import (
+    QApplication,
     QButtonGroup,
+    QDialog,
     QFrame,
     QHBoxLayout,
     QLabel,
     QMainWindow,
+    QMessageBox,
     QPushButton,
     QStackedWidget,
+    QTextEdit,
     QVBoxLayout,
     QWidget,
 )
 
+from .. import __version__
+from ..config import load_config
+from ..core import alerts, elevation, updates
 from .dashboard import Dashboard
-from .theme import ACCENT, MUTED
+from .health_page import HealthPage
+from .notifications_page import NotificationsPage
+from .recorder_page import RecorderPage
+from .setup_page import SetupPage
+from .share_page import SharePage
+from .theme import ACCENT, GOOD, MUTED
 from .worker import SamplerWorker
 
-_NAV_ITEMS = ["Dashboard", "Logs", "Health", "Inventory"]
-_PLACEHOLDERS = {
-    "Logs": "Captured crash logs will appear here once the logger (M3) lands.",
-    "Health": "The health report (M4) — log scan + plain-language findings — lands here.",
-    "Inventory": "System inventory (M5) — CPU/GPU/board/RAM/drivers — lands here.",
-}
+_NAV_ITEMS = ["Dashboard", "Logs", "Health", "Setup", "Notifications", "Share"]
 
 
 class MainWindow(QMainWindow):
+    _update_checked = Signal(object)  # (state, tag, notes)
+    _update_applied = Signal(int)     # pip exit code
+    _changelog_ready = Signal(object)  # ([(tag, date, notes)], error)
+    _elevated = Signal()              # privileged data collected at launch
+
     def __init__(self, interval: float = 1.0) -> None:
         super().__init__()
         self.setWindowTitle("RigDoctor")
         self.resize(1000, 680)
+        cfg = load_config()
 
         central = QWidget()
         self.setCentralWidget(central)
@@ -46,9 +64,18 @@ class MainWindow(QMainWindow):
         content_layout.setContentsMargins(0, 0, 0, 0)
         self._stack = QStackedWidget()
         self.dashboard = Dashboard()
-        self._stack.addWidget(self.dashboard)
-        for name in _NAV_ITEMS[1:]:
-            self._stack.addWidget(self._placeholder_page(name, _PLACEHOLDERS[name]))
+        self.recorder_page = RecorderPage()
+        self.health_page = HealthPage()
+        self.setup_page = SetupPage()
+        self.notifications_page = NotificationsPage()
+        self.notifications_page.changed.connect(self._apply_alert_settings)
+        self.share_page = SharePage()
+        self._stack.addWidget(self.dashboard)            # 0 Dashboard
+        self._stack.addWidget(self.recorder_page)        # 1 Logs
+        self._stack.addWidget(self.health_page)          # 2 Health
+        self._stack.addWidget(self.setup_page)           # 3 Setup
+        self._stack.addWidget(self.notifications_page)   # 4 Notifications
+        self._stack.addWidget(self.share_page)           # 5 Share
         content_layout.addWidget(self._stack)
 
         layout.addWidget(self._build_sidebar())
@@ -56,8 +83,40 @@ class MainWindow(QMainWindow):
 
         self._worker = SamplerWorker(interval=interval)
         self._worker.sampled.connect(self.dashboard.update_sample)
+        # Desktop alerts (M8): overheat / GPU-lost from the sample stream, new-version below.
+        # Configurable on the Notifications page; gated by AlertMonitor.enabled.
+        self._notified_update_tag = None
+        self._alert_monitor = alerts.AlertMonitor(
+            gpu_temp=float(cfg.get("gpu_temp_alert", 90.0)),
+            cpu_temp=float(cfg.get("cpu_temp_alert", 95.0)),
+        )
+        self._alert_monitor.enabled = bool(cfg.get("alerts_enabled", True))
+        self._worker.sampled.connect(self._alert_monitor.check)
         self._worker.start()
 
+        # Ask for the password once at launch and collect root-only data (SMART +
+        # dmidecode); Health/Inventory then always show the full picture (config:
+        # elevate_on_launch). Falls back silently to non-root if cancelled/unavailable.
+        if cfg.get("elevate_on_launch", True) and elevation.available():
+            self._elevated.connect(self._on_elevated)
+            threading.Thread(target=self._collect_privileged, daemon=True).start()
+
+        # Update check (M13): once at launch, then periodically so a newly published
+        # release is detected without restarting (interval from config; 0 disables).
+        self._latest_tag = None
+        self._latest_notes = ""
+        self._applied = False
+        self._update_checked.connect(self._show_update_state)
+        self._update_applied.connect(self._on_update_applied)
+        self._changelog_ready.connect(self._on_changelog)
+        self._start_update_check()
+        minutes = float(cfg.get("update_check_minutes", 30) or 0)
+        if minutes > 0:
+            self._update_timer = QTimer(self)
+            self._update_timer.setInterval(int(minutes * 60_000))
+            self._update_timer.timeout.connect(self._start_update_check)
+            self._update_timer.start()
+
     def _build_sidebar(self) -> QFrame:
         bar = QFrame()
         bar.setObjectName("Sidebar")
@@ -89,31 +148,163 @@ class MainWindow(QMainWindow):
         v.addStretch(1)
         live = QLabel(f'<span style="color:{ACCENT};">●</span> <span style="color:{MUTED};">Live</span>')
         v.addWidget(live)
+        version = QLabel(f"v{__version__}")
+        version.setObjectName("Muted")
+        v.addWidget(version)
+        changelog_btn = QPushButton("Changelog")
+        changelog_btn.setObjectName("LinkButton")
+        changelog_btn.setCursor(Qt.CursorShape.PointingHandCursor)
+        changelog_btn.clicked.connect(self._show_changelog)
+        v.addWidget(changelog_btn)
+        check_btn = QPushButton("Check for updates")
+        check_btn.setObjectName("LinkButton")
+        check_btn.setCursor(Qt.CursorShape.PointingHandCursor)
+        check_btn.clicked.connect(self._manual_check)
+        v.addWidget(check_btn)
+
+        # Update state (filled in by the background check).
+        self._update_label = QLabel("checking for updates…")
+        self._update_label.setObjectName("Muted")
+        v.addWidget(self._update_label)
+        self._update_btn = QPushButton()
+        self._update_btn.setObjectName("PrimaryButton")
+        self._update_btn.setCursor(Qt.CursorShape.PointingHandCursor)
+        self._update_btn.clicked.connect(self._apply_update)
+        self._update_btn.setVisible(False)
+        v.addWidget(self._update_btn)
+        self._restart_btn = QPushButton("Restart now")
+        self._restart_btn.setObjectName("PrimaryButton")
+        self._restart_btn.setCursor(Qt.CursorShape.PointingHandCursor)
+        self._restart_btn.clicked.connect(self._restart)
+        self._restart_btn.setVisible(False)
+        v.addWidget(self._restart_btn)
         return bar
 
-    def _placeholder_page(self, title: str, description: str) -> QWidget:
-        page = QWidget()
-        page.setObjectName("Page")
-        v = QVBoxLayout(page)
-        v.setContentsMargins(20, 18, 20, 18)
-        v.setSpacing(16)
-        head = QLabel(title)
-        head.setObjectName("PageTitle")
-        v.addWidget(head)
+    def _restart(self) -> None:
+        gui = os.path.join(os.path.dirname(sys.executable), "rigdoctor-gui")
+        if os.path.exists(gui):
+            QProcess.startDetached(gui)
+        else:  # dev / not installed next to python
+            QProcess.startDetached(sys.executable, sys.argv)
+        QApplication.instance().quit()
 
-        card = QFrame()
-        card.setObjectName("Card")
-        cv = QVBoxLayout(card)
-        cv.setContentsMargins(24, 48, 24, 48)
-        msg = QLabel(description)
-        msg.setObjectName("Muted")
-        msg.setWordWrap(True)
-        msg.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        cv.addWidget(msg)
-        v.addWidget(card)
-        v.addStretch(1)
-        return page
+    def _apply_update(self) -> None:
+        if not self._latest_tag:
+            return
+        box = QMessageBox(self)
+        box.setWindowTitle(f"Update to {self._latest_tag}")
+        box.setText(f"Update RigDoctor to {self._latest_tag}?")
+        notes_doc = QTextDocument()
+        notes_doc.setMarkdown(self._latest_notes or "_(no release notes)_")
+        box.setInformativeText(notes_doc.toHtml())  # render Markdown as rich text (#1)
+        box.setStandardButtons(QMessageBox.StandardButton.Ok | QMessageBox.StandardButton.Cancel)
+        box.button(QMessageBox.StandardButton.Ok).setText("Update")
+        if box.exec() != QMessageBox.StandardButton.Ok:
+            return
+        self._update_btn.setEnabled(False)
+        self._update_label.setText("updating…")
+        tag = self._latest_tag
+        threading.Thread(target=lambda: self._update_applied.emit(updates.apply_update(tag)[0]), daemon=True).start()
+
+    def _on_update_applied(self, rc: int) -> None:
+        if rc == 0:
+            self._applied = True
+            self._update_label.setText("update installed")
+            self._update_btn.setVisible(False)
+            self._restart_btn.setVisible(True)
+            if hasattr(self, "_update_timer"):
+                self._update_timer.stop()
+        else:
+            self._update_label.setText("update failed")
+            self._update_btn.setEnabled(True)
+
+    def _collect_privileged(self) -> None:
+        data = elevation.collect_via_pkexec()
+        if data is not None:
+            elevation.set_privileged(data)
+            self._elevated.emit()
+
+    def _on_elevated(self) -> None:
+        # Re-run Health now that root-only SMART data is available. (dmidecode is still
+        # collected and used by the relay guest view + the CLI `rigdoctor inventory`.)
+        self.health_page._run()
+
+    def _apply_alert_settings(self) -> None:
+        cfg = load_config()
+        self._alert_monitor.enabled = bool(cfg.get("alerts_enabled", True))
+        self._alert_monitor.gpu_temp = float(cfg.get("gpu_temp_alert", 90.0))
+        self._alert_monitor.cpu_temp = float(cfg.get("cpu_temp_alert", 95.0))
+
+    def _manual_check(self) -> None:
+        if self._applied:
+            return
+        self._update_label.setText("checking for updates…")
+        self._start_update_check()
+
+    def _start_update_check(self) -> None:
+        threading.Thread(target=self._check_updates, daemon=True).start()
+
+    def _show_changelog(self) -> None:
+        dialog = QDialog(self)
+        dialog.setWindowTitle("RigDoctor — Changelog")
+        dialog.resize(560, 540)
+        layout = QVBoxLayout(dialog)
+        view = QTextEdit()
+        view.setObjectName("Report")
+        view.setReadOnly(True)
+        view.setPlainText("Loading…")
+        layout.addWidget(view)
+        self._changelog_view = view
+        dialog.show()
+        threading.Thread(target=self._fetch_changelog, daemon=True).start()
+
+    def _fetch_changelog(self) -> None:
+        self._changelog_ready.emit(updates.list_releases())
+
+    def _on_changelog(self, result) -> None:
+        view = getattr(self, "_changelog_view", None)
+        if view is None:
+            return
+        releases, error = result
+        if error == updates.NO_TOKEN:
+            view.setPlainText("Add an update token (Setup → Update access) to load the changelog.")
+            return
+        if error or not releases:
+            view.setPlainText("Couldn't load the changelog from the update server.")
+            return
+        blocks = []
+        for tag, date, notes in releases:
+            title = f"## {tag}" + (f" — {date}" if date else "")
+            blocks.append(f"{title}\n\n{notes or '_(no notes)_'}")
+        view.setMarkdown("\n\n".join(blocks))  # render Markdown instead of raw text (#1)
+
+    def _check_updates(self) -> None:
+        self._update_checked.emit(updates.update_state())
+
+    def _show_update_state(self, result) -> None:
+        if self._applied:  # an update was applied this session; awaiting restart
+            return
+        state, tag, notes = result
+        self._latest_tag = tag
+        self._latest_notes = notes
+        self._update_btn.setVisible(False)
+        if state == updates.NO_TOKEN:
+            self._update_label.setText("connect to update server")
+        elif state == updates.AUTH:
+            self._update_label.setText("update access denied")
+        elif state == updates.NETWORK:
+            self._update_label.setText("update check unavailable")
+        elif state == updates.AVAILABLE:
+            self._update_label.setText(f'<span style="color:{GOOD};">{tag} available</span>')
+            self._update_btn.setText(f"Update to {tag}")
+            self._update_btn.setVisible(True)
+            if self._alert_monitor.enabled and tag != self._notified_update_tag:
+                self._notified_update_tag = tag  # once per version, not every poll
+                alerts.notify("Update available", f"RigDoctor {tag} is available — open RigDoctor to update.")
+        else:  # UP_TO_DATE
+            self._update_label.setText("up-to-date")
 
     def closeEvent(self, event) -> None:  # noqa: N802 (Qt override)
         self._worker.stop()
+        self.share_page.shutdown()
         super().closeEvent(event)

src/rigdoctor/gui/notifications_page.py

@@ -0,0 +1,108 @@
+"""Notifications page (M8 config): user-configurable alert settings."""
+
+from __future__ import annotations
+
+from PySide6.QtCore import Qt, Signal
+from PySide6.QtWidgets import (
+    QCheckBox,
+    QDoubleSpinBox,
+    QFrame,
+    QGridLayout,
+    QHBoxLayout,
+    QLabel,
+    QPushButton,
+    QVBoxLayout,
+    QWidget,
+)
+
+from ..config import load_config, update_config
+from ..core import alerts
+
+
+class NotificationsPage(QWidget):
+    changed = Signal()  # settings saved — main window re-applies them live
+
+    def __init__(self) -> None:
+        super().__init__()
+        self.setObjectName("Page")
+        root = QVBoxLayout(self)
+        root.setContentsMargins(20, 18, 20, 18)
+        root.setSpacing(16)
+
+        title = QLabel("Notifications")
+        title.setObjectName("PageTitle")
+        root.addWidget(title)
+
+        card = QFrame()
+        card.setObjectName("Card")
+        v = QVBoxLayout(card)
+        v.setContentsMargins(16, 14, 16, 14)
+        v.setSpacing(10)
+        head = QLabel("Alerts")
+        head.setStyleSheet("font-weight: 700; background: transparent;")
+        v.addWidget(head)
+
+        self._enabled = QCheckBox("Enable desktop notifications")
+        v.addWidget(self._enabled)
+
+        grid = QGridLayout()
+        grid.setHorizontalSpacing(12)
+        grid.setColumnStretch(2, 1)
+        self._gpu = self._spin()
+        self._cpu = self._spin()
+        grid.addWidget(QLabel("GPU temperature alert"), 0, 0)
+        grid.addWidget(self._gpu, 0, 1)
+        grid.addWidget(QLabel("CPU temperature alert"), 1, 0)
+        grid.addWidget(self._cpu, 1, 1)
+        v.addLayout(grid)
+
+        note = QLabel("GPU-lost and new-version alerts are included whenever notifications are enabled.")
+        note.setObjectName("Muted")
+        note.setWordWrap(True)
+        v.addWidget(note)
+
+        buttons = QHBoxLayout()
+        save = QPushButton("Save")
+        save.setObjectName("PrimaryButton")
+        save.clicked.connect(self._save)
+        test = QPushButton("Send test")
+        test.clicked.connect(self._test)
+        buttons.addWidget(save)
+        buttons.addWidget(test)
+        buttons.addStretch(1)
+        v.addLayout(buttons)
+        self._status = QLabel("")
+        self._status.setObjectName("Muted")
+        v.addWidget(self._status)
+
+        root.addWidget(card)
+        root.addStretch(1)
+        self._load()
+
+    @staticmethod
+    def _spin() -> QDoubleSpinBox:
+        spin = QDoubleSpinBox()
+        spin.setRange(40, 110)
+        spin.setDecimals(0)
+        spin.setSingleStep(1)
+        spin.setSuffix(" °C")
+        return spin
+
+    def _load(self) -> None:
+        cfg = load_config()
+        self._enabled.setChecked(bool(cfg.get("alerts_enabled", True)))
+        self._gpu.setValue(float(cfg.get("gpu_temp_alert", 90.0)))
+        self._cpu.setValue(float(cfg.get("cpu_temp_alert", 95.0)))
+
+    def _save(self) -> None:
+        update_config(
+            alerts_enabled=self._enabled.isChecked(),
+            gpu_temp_alert=self._gpu.value(),
+            cpu_temp_alert=self._cpu.value(),
+        )
+        self.changed.emit()
+        self._status.setText("Saved.")
+
+    def _test(self) -> None:
+        ok = alerts.notify("RigDoctor", "Test notification — alerts are working.")
+        self._status.setText("Test notification sent." if ok else "notify-send not found — install libnotify-bin (Setup).")

src/rigdoctor/gui/recorder_page.py

@@ -0,0 +1,185 @@
+"""Recording & Logs page (M3 in the GUI): start/stop/status + post-crash report.
+
+Drives the same background recorder as the CLI via core.reccontrol, so the GUI and
+`rigdoctor record …` are interchangeable.
+"""
+
+from __future__ import annotations
+
+import time
+
+from PySide6.QtCore import Qt, QTimer, QUrl
+from PySide6.QtGui import QDesktopServices, QFont
+from PySide6.QtWidgets import (
+    QDoubleSpinBox,
+    QFrame,
+    QHBoxLayout,
+    QLabel,
+    QPushButton,
+    QTextEdit,
+    QVBoxLayout,
+    QWidget,
+)
+
+from .. import config
+from ..core import reccontrol
+from ..core.crashlog import summarize
+from ..render import format_headline, render_summary
+from .theme import GOOD, MUTED, WARN
+
+
+def _panel(title: str) -> tuple[QFrame, QVBoxLayout]:
+    frame = QFrame()
+    frame.setObjectName("Card")
+    layout = QVBoxLayout(frame)
+    layout.setContentsMargins(16, 14, 16, 14)
+    layout.setSpacing(10)
+    label = QLabel(title)
+    label.setStyleSheet("font-weight: 700; background: transparent;")
+    layout.addWidget(label)
+    return frame, layout
+
+
+def _fmt_time(value, fmt="%Y-%m-%d %H:%M:%S") -> str:
+    return time.strftime(fmt, time.localtime(value)) if value else "—"
+
+
+class RecorderPage(QWidget):
+    def __init__(self) -> None:
+        super().__init__()
+        self.setObjectName("Page")
+        root = QVBoxLayout(self)
+        root.setContentsMargins(20, 18, 20, 18)
+        root.setSpacing(16)
+
+        title = QLabel("Recording")
+        title.setObjectName("PageTitle")
+        root.addWidget(title)
+
+        # --- Status + controls -------------------------------------------------
+        status_card, status_layout = _panel("Status")
+
+        self._state = QLabel("○ Not recording")
+        self._state.setStyleSheet(f"color: {MUTED}; font-weight: 700; background: transparent;")
+        status_layout.addWidget(self._state)
+
+        self._info = QLabel("")
+        self._info.setObjectName("Muted")
+        status_layout.addWidget(self._info)
+
+        self._latest = QLabel("")
+        status_layout.addWidget(self._latest)
+
+        self._warn = QLabel("")
+        self._warn.setStyleSheet(f"color: {WARN}; font-weight: 600; background: transparent;")
+        self._warn.setVisible(False)
+        status_layout.addWidget(self._warn)
+
+        controls = QHBoxLayout()
+        controls.setSpacing(8)
+        controls.addWidget(QLabel("Interval (s)"))
+        self._interval = QDoubleSpinBox()
+        self._interval.setRange(0.1, 10.0)
+        self._interval.setSingleStep(0.1)
+        self._interval.setValue(float(config.DEFAULTS["interval"]))
+        controls.addWidget(self._interval)
+        self._start_btn = QPushButton("Start recording")
+        self._start_btn.setObjectName("PrimaryButton")
+        self._start_btn.clicked.connect(self._on_start)
+        self._stop_btn = QPushButton("Stop")
+        self._stop_btn.clicked.connect(self._on_stop)
+        controls.addWidget(self._start_btn)
+        controls.addWidget(self._stop_btn)
+        controls.addStretch(1)
+        folder_btn = QPushButton("Open log folder")
+        folder_btn.clicked.connect(self._open_folder)
+        controls.addWidget(folder_btn)
+        status_layout.addLayout(controls)
+        root.addWidget(status_card)
+
+        # --- Report ------------------------------------------------------------
+        report_card = QFrame()
+        report_card.setObjectName("Card")
+        report_layout = QVBoxLayout(report_card)
+        report_layout.setContentsMargins(16, 14, 16, 14)
+        report_layout.setSpacing(10)
+        header = QHBoxLayout()
+        report_title = QLabel("Post-crash report")
+        report_title.setStyleSheet("font-weight: 700; background: transparent;")
+        header.addWidget(report_title)
+        header.addStretch(1)
+        refresh_btn = QPushButton("Refresh")
+        refresh_btn.clicked.connect(self._load_report)
+        header.addWidget(refresh_btn)
+        report_layout.addLayout(header)
+
+        self._report = QTextEdit()
+        self._report.setObjectName("Report")
+        self._report.setReadOnly(True)
+        self._report.setFont(QFont("monospace", 10))
+        self._report.setLineWrapMode(QTextEdit.LineWrapMode.NoWrap)
+        report_layout.addWidget(self._report)
+        root.addWidget(report_card, 1)
+
+        # Poll recorder status once a second (reflects CLI-driven sessions too).
+        self._timer = QTimer(self)
+        self._timer.setInterval(1000)
+        self._timer.timeout.connect(self._refresh_status)
+        self._timer.start()
+        self._refresh_status()
+        self._load_report()
+
+    # --- actions ---------------------------------------------------------------
+    def _on_start(self) -> None:
+        self._start_btn.setEnabled(False)
+        reccontrol.start_background(interval=self._interval.value())
+        QTimer.singleShot(600, self._refresh_status)
+
+    def _on_stop(self) -> None:
+        self._stop_btn.setEnabled(False)
+        reccontrol.stop_background()
+        QTimer.singleShot(600, self._refresh_status)
+        QTimer.singleShot(900, self._load_report)
+
+    def _open_folder(self) -> None:
+        config.LOG_DIR.mkdir(parents=True, exist_ok=True)
+        QDesktopServices.openUrl(QUrl.fromLocalFile(str(config.LOG_DIR)))
+
+    # --- refresh ---------------------------------------------------------------
+    def _refresh_status(self) -> None:
+        pid = reccontrol.running_pid()
+        status = reccontrol.read_status()
+        running = pid is not None
+
+        if running:
+            self._state.setText(f"● Recording  (pid {pid})")
+            self._state.setStyleSheet(f"color: {GOOD}; font-weight: 700; background: transparent;")
+        else:
+            self._state.setText("○ Not recording")
+            self._state.setStyleSheet(f"color: {MUTED}; font-weight: 700; background: transparent;")
+        self._start_btn.setEnabled(not running)
+        self._stop_btn.setEnabled(running)
+        self._interval.setEnabled(not running)
+
+        if status:
+            self._info.setText(
+                f"Samples: {status.get('samples', 0)}    "
+                f"Started: {_fmt_time(status.get('started'))}    "
+                f"Updated: {_fmt_time(status.get('updated'), '%H:%M:%S')}\n"
+                f"Log: {status.get('log', config.LOG_FILE)}"
+            )
+            latest = status.get("latest")
+            self._latest.setText(format_headline(latest) if latest else "")
+            if status.get("gpu_lost"):
+                self._warn.setText("⚠ A GPU-lost event was recorded this session")
+                self._warn.setVisible(True)
+            else:
+                self._warn.setVisible(False)
+        else:
+            self._info.setText("No recording yet. Press “Start recording”.")
+            self._latest.setText("")
+            self._warn.setVisible(False)
+
+    def _load_report(self) -> None:
+        summary = summarize(config.LOG_FILE, last_n=10)
+        self._report.setPlainText(render_summary(summary, log_path=config.LOG_FILE))

src/rigdoctor/gui/setup_page.py

@@ -0,0 +1,239 @@
+"""Setup page (M9 in the GUI): show environment + optional components, install missing."""
+
+from __future__ import annotations
+
+import threading
+
+from PySide6.QtCore import Qt, QUrl, Signal
+from PySide6.QtGui import QDesktopServices
+from PySide6.QtWidgets import (
+    QApplication,
+    QFrame,
+    QHBoxLayout,
+    QLabel,
+    QLineEdit,
+    QMessageBox,
+    QPushButton,
+    QSizePolicy,
+    QTextEdit,
+    QVBoxLayout,
+    QWidget,
+)
+
+from .. import config
+from ..core import installer, sysenv, uninstall, updates
+from .theme import GOOD, MUTED, WARN
+
+
+def _panel(title: str) -> tuple[QFrame, QVBoxLayout]:
+    frame = QFrame()
+    frame.setObjectName("Card")
+    frame.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Maximum)
+    layout = QVBoxLayout(frame)
+    layout.setContentsMargins(16, 14, 16, 14)
+    layout.setSpacing(8)
+    label = QLabel(title)
+    label.setStyleSheet("font-weight: 700; background: transparent;")
+    layout.addWidget(label)
+    return frame, layout
+
+
+_BACKEND_DESC = {
+    "env": "token from $RIGDOCTOR_TOKEN",
+    "keyring": "token stored in the OS keyring (encrypted)",
+    "file": "token stored in a 0600 file — install libsecret-tools to encrypt it",
+    "none": "no token saved",
+}
+
+
+class SetupPage(QWidget):
+    _installed = Signal(int, str)
+    _upd_state = Signal(object)
+
+    def __init__(self) -> None:
+        super().__init__()
+        self.setObjectName("Page")
+        self._installed.connect(self._on_installed)
+        self._upd_state.connect(self._on_upd_state)
+
+        root = QVBoxLayout(self)
+        root.setContentsMargins(20, 18, 20, 18)
+        root.setSpacing(16)
+
+        title = QLabel("Setup")
+        title.setObjectName("PageTitle")
+        root.addWidget(title)
+
+        env_card, env_layout = _panel("Environment")
+        self._env = QLabel("")
+        self._env.setObjectName("Muted")
+        env_layout.addWidget(self._env)
+        root.addWidget(env_card)
+
+        comp_card, comp_layout = _panel("Optional components")
+        self._components = QVBoxLayout()
+        self._components.setSpacing(6)
+        comp_layout.addLayout(self._components)
+        controls = QHBoxLayout()
+        self._install_btn = QPushButton("Install missing")
+        self._install_btn.setObjectName("PrimaryButton")
+        self._install_btn.clicked.connect(self._install)
+        self._refresh_btn = QPushButton("Re-check")
+        self._refresh_btn.clicked.connect(self._refresh)
+        controls.addWidget(self._install_btn)
+        controls.addWidget(self._refresh_btn)
+        controls.addStretch(1)
+        comp_layout.addLayout(controls)
+        root.addWidget(comp_card)
+
+        # Account access (M13/M12): one Gitea token gates updates and session sharing.
+        upd_card, upd_layout = _panel("Account access")
+        hint = QLabel("A Gitea access token unlocks updates and session sharing. "
+                      "Create it with scopes <b>read:user</b> and <b>read:repository</b>.")
+        hint.setObjectName("Muted")
+        hint.setWordWrap(True)
+        upd_layout.addWidget(hint)
+        self._upd_status = QLabel("")
+        self._upd_status.setObjectName("Muted")
+        self._upd_status.setWordWrap(True)
+        upd_layout.addWidget(self._upd_status)
+        token_row = QHBoxLayout()
+        self._token_input = QLineEdit()
+        self._token_input.setEchoMode(QLineEdit.EchoMode.Password)
+        self._token_input.setPlaceholderText("Paste a Gitea token (read:user + read:repository)")
+        save_btn = QPushButton("Save token")
+        save_btn.setObjectName("PrimaryButton")
+        save_btn.clicked.connect(self._save_token)
+        get_btn = QPushButton("Get a token")
+        get_btn.clicked.connect(lambda: QDesktopServices.openUrl(QUrl(updates.TOKEN_PAGE)))
+        token_row.addWidget(self._token_input, 1)
+        token_row.addWidget(save_btn)
+        token_row.addWidget(get_btn)
+        upd_layout.addLayout(token_row)
+        root.addWidget(upd_card)
+
+        self._output = QTextEdit()
+        self._output.setObjectName("Report")
+        self._output.setReadOnly(True)
+        self._output.setMinimumHeight(180)
+        self._output.setVisible(False)
+        root.addWidget(self._output)
+        root.addStretch(1)
+
+        danger = QHBoxLayout()
+        danger.addStretch(1)
+        uninstall_btn = QPushButton("Uninstall RigDoctor")
+        uninstall_btn.setObjectName("DangerButton")
+        uninstall_btn.clicked.connect(self._uninstall)
+        danger.addWidget(uninstall_btn)
+        root.addLayout(danger)
+
+        self._refresh()
+        self._refresh_update_status()
+
+    def _uninstall(self) -> None:
+        box = QMessageBox(self)
+        box.setIcon(QMessageBox.Icon.Warning)
+        box.setWindowTitle("Uninstall RigDoctor")
+        box.setText("Uninstall RigDoctor?")
+        box.setInformativeText(
+            "This removes the app. Choose “Remove all” to also delete your settings, "
+            "update token, and captured logs."
+        )
+        remove_all = box.addButton("Remove all", QMessageBox.ButtonRole.DestructiveRole)
+        app_only = box.addButton("Uninstall", QMessageBox.ButtonRole.AcceptRole)
+        box.addButton("Cancel", QMessageBox.ButtonRole.RejectRole)
+        box.exec()
+        clicked = box.clickedButton()
+        if clicked is remove_all:
+            purge = True
+        elif clicked is app_only:
+            purge = False
+        else:
+            return
+        uninstall.uninstall(purge=purge)
+        QMessageBox.information(self, "RigDoctor", "Uninstalling… RigDoctor will close now.")
+        QApplication.instance().quit()
+
+    def _refresh(self) -> None:
+        self._env.setText(
+            f"Distro: {sysenv.distro_name()}    "
+            f"Package manager: {sysenv.package_manager() or 'none (apt required)'}    "
+            f"GPU: {', '.join(sysenv.gpu_vendors()) or 'unknown'}"
+        )
+        while self._components.count():
+            item = self._components.takeAt(0)
+            w = item.widget()
+            if w is not None:
+                w.deleteLater()
+
+        status = installer.component_status()
+        for component, present in status:
+            mark = "✓" if present else "✗"
+            color = GOOD if present else MUTED
+            row = QLabel(f"<span style='color:{color}'>[{mark}]</span>  "
+                         f"<b>{component.name}</b> — {component.enables}")
+            row.setTextFormat(Qt.TextFormat.RichText)
+            row.setWordWrap(True)
+            self._components.addWidget(row)
+
+        self._missing = [c for c, present in status if not present]
+        self._install_btn.setEnabled(bool(self._missing) and sysenv.package_manager() == "apt")
+        if not self._missing:
+            self._install_btn.setText("All installed ✔")
+
+    def _install(self) -> None:
+        packages = installer.missing_packages(self._missing)
+        if not packages:
+            return
+        self._install_btn.setEnabled(False)
+        self._install_btn.setText("Installing… (may prompt for password)")
+        self._output.setVisible(True)
+        self._output.setPlainText(f"Installing: {' '.join(packages)}\n")
+        threading.Thread(target=self._work, args=(packages,), daemon=True).start()
+
+    def _work(self, packages: list[str]) -> None:
+        rc, out = installer.install_packages(packages)
+        self._installed.emit(rc, out)
+
+    def _on_installed(self, rc: int, out: str) -> None:
+        self._output.setPlainText(out[-4000:])
+        self._install_btn.setText("Install missing")
+        self._refresh()
+        # If libsecret-tools was just installed, move a file token into the keyring.
+        if config.token_backend() == "file" and config.keyring_available():
+            token = config.load_token()
+            if token:
+                config.save_token(token)
+        self._refresh_update_status()
+
+    # --- update access (token) ------------------------------------------------
+    def _save_token(self) -> None:
+        token = self._token_input.text().strip()
+        if not token:
+            return
+        config.save_token(token)
+        self._token_input.clear()
+        self._refresh_update_status()
+
+    def _refresh_update_status(self) -> None:
+        self._upd_status.setText(f"{_BACKEND_DESC[config.token_backend()]} · checking…")
+        threading.Thread(target=self._check_update, daemon=True).start()
+
+    def _check_update(self) -> None:
+        self._upd_state.emit((config.token_backend(), updates.update_state()))
+
+    def _on_upd_state(self, result) -> None:
+        backend, (state, tag, _notes) = result
+        msg = {
+            updates.NO_TOKEN: "paste a token below to enable updates",
+            updates.AUTH: "token rejected — check its scope/permissions",
+            updates.NETWORK: "couldn't reach the update server",
+            updates.UP_TO_DATE: f"up to date ({tag})" if tag else "up to date",
+            updates.AVAILABLE: f"update available: {tag}",
+        }[state]
+        color = GOOD if state == updates.AVAILABLE else (WARN if state == updates.AUTH else MUTED)
+        self._upd_status.setText(
+            f"<span style='color:{MUTED}'>{_BACKEND_DESC[backend]}</span> · "
+            f"<span style='color:{color}'>{msg}</span>"
+        )

src/rigdoctor/gui/share_page.py

@@ -0,0 +1,348 @@
+"""Share page (M12): host or join a shared session over the relay.
+
+Guest sees the host's live sensors + health + inventory (read-only). If the host enables it,
+a full **PTY terminal** is shared: the guest types and the commands run on the host (as the
+host's user), the host reads along, and the host can type too — e.g. a sudo password, which
+stays local and is never sent to the guest.
+"""
+
+from __future__ import annotations
+
+import base64
+import json
+
+from PySide6.QtCore import Qt, QSocketNotifier, QTimer, QUrl
+from PySide6.QtWebSockets import QWebSocket
+from PySide6.QtWidgets import (
+    QCheckBox,
+    QFrame,
+    QHBoxLayout,
+    QLabel,
+    QLineEdit,
+    QPushButton,
+    QTextEdit,
+    QVBoxLayout,
+    QWidget,
+)
+
+from ..config import load_config, load_token
+from ..core import share
+from ..core.pty_session import PtySession
+from ..core.sampler import Sampler
+from ..core.sources import available_sources
+from .terminal_widget import TerminalView
+
+
+def _relay_url() -> str:
+    return load_config().get("relay_url", "wss://rigdoctor.jesseyvanofferen.com").rstrip("/")
+
+
+def _b64(data: bytes) -> str:
+    return base64.b64encode(data).decode("ascii")
+
+
+def _card(title: str) -> tuple[QFrame, QVBoxLayout]:
+    card = QFrame()
+    card.setObjectName("Card")
+    v = QVBoxLayout(card)
+    v.setContentsMargins(16, 14, 16, 14)
+    v.setSpacing(10)
+    head = QLabel(title)
+    head.setStyleSheet("font-weight: 700; background: transparent;")
+    v.addWidget(head)
+    return card, v
+
+
+class SharePage(QWidget):
+    def __init__(self) -> None:
+        super().__init__()
+        self.setObjectName("Page")
+        self._sampler = Sampler(available_sources())
+        self._host_ws: QWebSocket | None = None
+        self._guest_ws: QWebSocket | None = None
+        self._pty: PtySession | None = None
+        self._pty_notifier: QSocketNotifier | None = None
+        self._last_report = None
+        self._last_inv = None
+        self._timer = QTimer(self)
+        self._timer.setInterval(2000)
+        self._timer.timeout.connect(self._stream)
+
+        root = QVBoxLayout(self)
+        root.setContentsMargins(20, 18, 20, 18)
+        root.setSpacing(14)
+        title = QLabel("Share")
+        title.setObjectName("PageTitle")
+        root.addWidget(title)
+        root.addWidget(self._build_host())
+        root.addWidget(self._build_guest(), 1)
+
+    # ------------------------------------------------------------------ host
+    def _build_host(self) -> QFrame:
+        card, v = _card("Start a shared session")
+        self._host_status = QLabel("Let someone with an account view your machine, read-only.")
+        self._host_status.setObjectName("Muted")
+        self._host_status.setWordWrap(True)
+        v.addWidget(self._host_status)
+
+        row = QHBoxLayout()
+        self._start_btn = QPushButton("Start shared session")
+        self._start_btn.setObjectName("PrimaryButton")
+        self._start_btn.clicked.connect(self._start_host)
+        self._stop_btn = QPushButton("Stop")
+        self._stop_btn.setEnabled(False)
+        self._stop_btn.clicked.connect(self._stop_host)
+        self._code_label = QLabel("")
+        self._code_label.setStyleSheet("font-weight:700; font-size:18px; color:#38bdf8; background:transparent;")
+        self._code_label.setTextInteractionFlags(Qt.TextInteractionFlag.TextSelectableByMouse)
+        row.addWidget(self._start_btn)
+        row.addWidget(self._stop_btn)
+        row.addSpacing(12)
+        row.addWidget(self._code_label)
+        row.addStretch(1)
+        v.addLayout(row)
+
+        self._allow_term = QCheckBox("Allow remote terminal — the guest runs commands as your user (you read along; you can type too, e.g. a sudo password)")
+        self._allow_term.setStyleSheet("color:#fb923c; background:transparent;")
+        self._allow_term.toggled.connect(self._toggle_terminal)
+        v.addWidget(self._allow_term)
+
+        self._host_term = TerminalView()
+        self._host_term.keys.connect(lambda b: self._pty.write(b) if self._pty else None)
+        self._host_term.resized.connect(lambda r, c: self._pty.set_size(r, c) if self._pty else None)
+        self._host_term.setVisible(False)
+        v.addWidget(self._host_term)
+        return card
+
+    def _start_host(self) -> None:
+        if not load_token():
+            self._host_status.setText("Set a Gitea access token in Setup → Account access first.")
+            return
+        self._host_status.setText("Connecting to the relay…")
+        self._start_btn.setEnabled(False)
+        self._host_ws = QWebSocket()
+        self._host_ws.connected.connect(lambda: self._host_ws.sendTextMessage(json.dumps({"token": load_token()})))
+        self._host_ws.textMessageReceived.connect(self._host_msg)
+        self._host_ws.disconnected.connect(self._host_closed)
+        self._host_ws.errorOccurred.connect(lambda *_: self._host_status.setText(f"Relay error: {self._host_ws.errorString()}"))
+        self._host_ws.open(QUrl(_relay_url() + "/ws/host"))
+
+    def _host_msg(self, text: str) -> None:
+        try:
+            data = json.loads(text)
+        except ValueError:
+            return
+        if data.get("error"):
+            self._host_status.setText(f"Rejected: {data['error']}")
+            return
+        if "code" in data:  # relay handshake
+            self._code_label.setText(data["code"])
+            self._host_status.setText(f"Sharing as {data.get('user', '?')} — give this code to whoever should view your machine.")
+            self._stop_btn.setEnabled(True)
+            self._host_ws.sendTextMessage(share.host_full_frame(self._sampler))
+            self._send_terminal_state()
+            if self._allow_term.isChecked():
+                self._start_pty()
+            self._timer.start()
+            return
+        kind = data.get("type")  # frames forwarded from a guest
+        if kind == "req_full":
+            # A guest just joined — send a full frame AND the current terminal state, so a
+            # guest that joins *after* the host enabled the terminal still gets access.
+            self._host_ws.sendTextMessage(share.host_full_frame(self._sampler))
+            self._send_terminal_state()
+        elif kind == "pty_in" and self._pty:
+            self._pty.write(base64.b64decode(data["data"]))
+        elif kind == "pty_resize" and self._pty:
+            self._pty.set_size(int(data["rows"]), int(data["cols"]))
+
+    def _toggle_terminal(self, on: bool) -> None:
+        if on and self._host_ws and self._code_label.text():
+            self._start_pty()
+        elif not on:
+            self._stop_pty()
+        self._send_terminal_state()
+
+    def _send_terminal_state(self) -> None:
+        if self._host_ws and self._code_label.text():
+            self._host_ws.sendTextMessage(json.dumps({"type": "terminal", "enabled": self._allow_term.isChecked()}))
+
+    def _start_pty(self) -> None:
+        if self._pty:
+            return
+        rows, cols = self._host_term.grid()
+        self._pty = PtySession(rows=rows, cols=cols)
+        self._pty_notifier = QSocketNotifier(self._pty.master_fd, QSocketNotifier.Type.Read, self)
+        self._pty_notifier.activated.connect(self._on_pty_output)
+        self._host_term.reset()
+        self._host_term.setVisible(True)
+
+    def _on_pty_output(self) -> None:
+        if not self._pty:
+            return
+        data = self._pty.read()
+        if not data:  # shell exited / EOF
+            self._stop_pty()
+            self._send_terminal_state()
+            self._allow_term.setChecked(False)
+            return
+        self._host_term.feed(data)
+        if self._host_ws:
+            self._host_ws.sendTextMessage(json.dumps({"type": "pty", "data": _b64(data)}))
+
+    def _stop_pty(self) -> None:
+        if self._pty_notifier:
+            self._pty_notifier.setEnabled(False)
+            self._pty_notifier = None
+        if self._pty:
+            self._pty.close()
+            self._pty = None
+        self._host_term.setVisible(False)
+
+    def _stream(self) -> None:
+        if self._host_ws:
+            self._host_ws.sendTextMessage(share.host_snapshot_frame(self._sampler))
+
+    def _stop_host(self) -> None:
+        self._timer.stop()
+        self._stop_pty()
+        if self._host_ws:
+            self._host_ws.close()
+            self._host_ws = None
+        self._code_label.setText("")
+        self._stop_btn.setEnabled(False)
+        self._start_btn.setEnabled(True)
+        self._host_status.setText("Stopped sharing.")
+
+    def _host_closed(self) -> None:
+        self._timer.stop()
+        self._stop_pty()
+        self._start_btn.setEnabled(True)
+        self._stop_btn.setEnabled(False)
+        if self._code_label.text():
+            self._code_label.setText("")
+            self._host_status.setText("Disconnected from the relay.")
+
+    # ----------------------------------------------------------------- guest
+    def _build_guest(self) -> QFrame:
+        card, v = _card("Join a shared session")
+        row = QHBoxLayout()
+        self._code_input = QLineEdit()
+        self._code_input.setPlaceholderText("Enter share code")
+        self._code_input.setMaxLength(6)
+        self._code_input.setFixedWidth(160)
+        self._join_btn = QPushButton("Join")
+        self._join_btn.setObjectName("PrimaryButton")
+        self._join_btn.clicked.connect(self._join)
+        self._leave_btn = QPushButton("Leave")
+        self._leave_btn.setEnabled(False)
+        self._leave_btn.clicked.connect(self._leave)
+        row.addWidget(self._code_input)
+        row.addWidget(self._join_btn)
+        row.addWidget(self._leave_btn)
+        row.addStretch(1)
+        v.addLayout(row)
+        self._guest_status = QLabel("")
+        self._guest_status.setObjectName("Muted")
+        v.addWidget(self._guest_status)
+
+        self._view = QTextEdit()
+        self._view.setObjectName("Report")
+        self._view.setReadOnly(True)
+        self._view.setVisible(False)
+        self._view.setMinimumHeight(200)
+        v.addWidget(self._view)
+
+        self._term_label = QLabel("")
+        self._term_label.setObjectName("Muted")
+        self._term_label.setVisible(False)
+        v.addWidget(self._term_label)
+        self._guest_term = TerminalView()
+        self._guest_term.keys.connect(self._guest_key)
+        self._guest_term.resized.connect(self._guest_resize)
+        self._guest_term.setVisible(False)
+        v.addWidget(self._guest_term)
+        return card
+
+    def _join(self) -> None:
+        code = self._code_input.text().strip().upper()
+        if not load_token():
+            self._guest_status.setText("Set a Gitea access token in Setup → Account access first.")
+            return
+        if not code:
+            self._guest_status.setText("Enter a share code.")
+            return
+        self._guest_status.setText("Connecting…")
+        self._join_btn.setEnabled(False)
+        self._guest_ws = QWebSocket()
+        self._guest_ws.connected.connect(lambda: self._guest_ws.sendTextMessage(json.dumps({"token": load_token()})))
+        self._guest_ws.textMessageReceived.connect(self._guest_msg)
+        self._guest_ws.disconnected.connect(self._guest_closed)
+        self._guest_ws.errorOccurred.connect(lambda *_: self._guest_status.setText(f"Relay error: {self._guest_ws.errorString()}"))
+        self._guest_ws.open(QUrl(_relay_url() + "/ws/guest/" + code))
+
+    def _guest_msg(self, text: str) -> None:
+        try:
+            data = json.loads(text)
+        except ValueError:
+            return
+        if data.get("error"):
+            self._guest_status.setText(data["error"])
+            return
+        if "joined" in data:
+            self._guest_status.setText(f"Viewing {data.get('host', '?')}'s machine — read-only.")
+            self._leave_btn.setEnabled(True)
+            self._view.setVisible(True)
+            self._guest_ws.sendTextMessage(json.dumps({"type": "req_full"}))
+            return
+        kind = data.get("type")
+        if kind in ("full", "snapshot"):
+            if kind == "full":
+                self._last_report = data.get("report")
+                self._last_inv = data.get("inventory")
+            self._view.setHtml(share.guest_html(data.get("snapshot"), self._last_report, self._last_inv))
+        elif kind == "terminal":
+            self._set_terminal_visible(bool(data.get("enabled")))
+        elif kind == "pty":
+            self._guest_term.feed(base64.b64decode(data["data"]))
+
+    def _set_terminal_visible(self, enabled: bool) -> None:
+        self._term_label.setVisible(True)
+        self._term_label.setText("Terminal enabled by host — your keystrokes run on their machine. Click here and type."
+                                 if enabled else "Terminal not enabled by the host.")
+        self._guest_term.setVisible(enabled)
+        if enabled:
+            self._guest_term.reset()
+            self._guest_resize(*self._guest_term.grid())
+            self._guest_term.setFocus()
+
+    def _guest_key(self, data: bytes) -> None:
+        if self._guest_ws:
+            self._guest_ws.sendTextMessage(json.dumps({"type": "pty_in", "data": _b64(data)}))
+
+    def _guest_resize(self, rows: int, cols: int) -> None:
+        if self._guest_ws:
+            self._guest_ws.sendTextMessage(json.dumps({"type": "pty_resize", "rows": rows, "cols": cols}))
+
+    def _leave(self) -> None:
+        if self._guest_ws:
+            self._guest_ws.close()
+            self._guest_ws = None
+        for w in (self._view, self._term_label, self._guest_term):
+            w.setVisible(False)
+        self._leave_btn.setEnabled(False)
+        self._join_btn.setEnabled(True)
+        self._guest_status.setText("Left the session.")
+
+    def _guest_closed(self) -> None:
+        self._join_btn.setEnabled(True)
+        self._leave_btn.setEnabled(False)
+        if self._view.isVisible():
+            self._guest_status.setText("Session ended (host disconnected).")
+
+    def shutdown(self) -> None:
+        self._timer.stop()
+        self._stop_pty()
+        for ws in (self._host_ws, self._guest_ws):
+            if ws:
+                ws.close()

src/rigdoctor/gui/terminal_widget.py

@@ -0,0 +1,89 @@
+"""A minimal terminal view: renders PTY output via pyte and emits keystrokes (M12, Tier 3).
+
+Used by both sides of a shared session — the host (mirrors its local PTY, can also type, e.g.
+a sudo password) and the guest (renders the streamed PTY, sends keystrokes). Monochrome for
+now; cursor addressing / layout (vim, top) work via pyte.
+"""
+
+from __future__ import annotations
+
+import pyte
+from PySide6.QtCore import Qt, Signal
+from PySide6.QtGui import QFontDatabase, QFontMetrics, QTextCursor
+from PySide6.QtWidgets import QPlainTextEdit
+
+
+class TerminalView(QPlainTextEdit):
+    keys = Signal(bytes)        # user keystrokes -> bytes for the PTY
+    resized = Signal(int, int)  # rows, cols
+
+    def __init__(self, rows: int = 24, cols: int = 80):
+        super().__init__()
+        self.setLineWrapMode(QPlainTextEdit.LineWrapMode.NoWrap)
+        self.setFont(QFontDatabase.systemFont(QFontDatabase.SystemFont.FixedFont))
+        self.setUndoRedoEnabled(False)
+        self.setMinimumHeight(260)
+        self._rows, self._cols = rows, cols
+        self._screen = pyte.Screen(cols, rows)
+        self._stream = pyte.ByteStream(self._screen)
+
+    def grid(self) -> tuple[int, int]:
+        return self._rows, self._cols
+
+    def feed(self, data: bytes) -> None:
+        self._stream.feed(data)
+        self._render()
+
+    def reset(self) -> None:
+        self._screen.reset()
+        self._render()
+
+    def _render(self) -> None:
+        self.setPlainText("\n".join(self._screen.display))
+        # Place the caret at the terminal's actual cursor (row, col) and keep it in view.
+        cursor = self.textCursor()
+        cursor.movePosition(QTextCursor.MoveOperation.Start)
+        cursor.movePosition(QTextCursor.MoveOperation.Down, QTextCursor.MoveMode.MoveAnchor, self._screen.cursor.y)
+        cursor.movePosition(QTextCursor.MoveOperation.Right, QTextCursor.MoveMode.MoveAnchor, self._screen.cursor.x)
+        self.setTextCursor(cursor)
+        self.ensureCursorVisible()
+
+    def resizeEvent(self, event):  # noqa: N802 (Qt override)
+        super().resizeEvent(event)
+        fm = QFontMetrics(self.font())
+        cw = max(1, fm.horizontalAdvance("M"))
+        ch = max(1, fm.height())
+        cols = max(20, self.viewport().width() // cw)
+        rows = max(6, self.viewport().height() // ch)
+        if (rows, cols) != (self._rows, self._cols):
+            self._rows, self._cols = rows, cols
+            self._screen.resize(rows, cols)
+            self._render()
+            self.resized.emit(rows, cols)
+
+    def keyPressEvent(self, event):  # noqa: N802 (Qt override)
+        data = self._translate(event)
+        if data:
+            self.keys.emit(data)
+        event.accept()  # display comes from PTY output, not local editing
+
+    @staticmethod
+    def _translate(event) -> bytes:
+        key = event.key()
+        mod = event.modifiers()
+        k = Qt.Key
+        if mod & Qt.KeyboardModifier.ControlModifier and k.Key_A.value <= key <= k.Key_Z.value:
+            return bytes([key - k.Key_A.value + 1])  # Ctrl-A..Ctrl-Z
+        special = {
+            k.Key_Return.value: b"\r", k.Key_Enter.value: b"\r",
+            k.Key_Backspace.value: b"\x7f", k.Key_Tab.value: b"\t",
+            k.Key_Escape.value: b"\x1b",
+            k.Key_Up.value: b"\x1b[A", k.Key_Down.value: b"\x1b[B",
+            k.Key_Right.value: b"\x1b[C", k.Key_Left.value: b"\x1b[D",
+            k.Key_Home.value: b"\x1b[H", k.Key_End.value: b"\x1b[F",
+            k.Key_Delete.value: b"\x1b[3~", k.Key_PageUp.value: b"\x1b[5~", k.Key_PageDown.value: b"\x1b[6~",
+        }
+        if key in special:
+            return special[key]
+        text = event.text()
+        return text.encode("utf-8") if text else b""

src/rigdoctor/gui/theme.py

@@ -2,6 +2,10 @@
 
 from __future__ import annotations
 
+from pathlib import Path
+
+_CHECK = (Path(__file__).parent / "assets" / "check.svg").as_posix()
+
 # Palette (dark)
 BG = "#101216"
 SIDEBAR = "#15181e"
@@ -10,6 +14,7 @@ CARD_BORDER = "#2a2f39"
 TRACK = "#2a2f39"
 TEXT = "#e6e8eb"
 MUTED = "#8b929c"
+INPUT_BG = "#0d0f13"  # form-control background (must stay dark — see contrast rule)
 
 ACCENT = "#38bdf8"
 COLD = "#7dd3fc"  # icey-blue
@@ -88,4 +93,61 @@ QScrollBar::handle:vertical {{ background: {CARD_BORDER}; border-radius: 5px; mi
 QScrollBar::handle:vertical:hover {{ background: #3a414d; }}
 QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical {{ height: 0; }}
 QScrollBar::add-page:vertical, QScrollBar::sub-page:vertical {{ background: transparent; }}
+
+QPushButton {{
+    background: #262b34; color: {TEXT}; border: 1px solid {CARD_BORDER};
+    border-radius: 8px; padding: 7px 14px;
+}}
+QPushButton:hover {{ background: #2f3540; }}
+QPushButton:disabled {{ color: #5b626c; background: #1c2026; border-color: #23272f; }}
+QPushButton#PrimaryButton {{ background: {ACCENT}; color: #06222e; border: none; font-weight: 700; }}
+QPushButton#PrimaryButton:hover {{ background: #5cc8fb; }}
+QPushButton#PrimaryButton:disabled {{ background: #27424f; color: #5f7c8a; }}
+
+QDoubleSpinBox, QSpinBox {{
+    background: #262b34; color: {TEXT}; border: 1px solid {CARD_BORDER};
+    border-radius: 6px; padding: 4px 6px;
+}}
+
+QTextEdit#Report {{
+    background: #0d0f13; color: #cfd3da; border: 1px solid {CARD_BORDER}; border-radius: 8px;
+}}
+
+QPushButton#DangerButton {{
+    background: transparent; color: {CRIT}; border: 1px solid {CRIT};
+    border-radius: 8px; padding: 7px 14px;
+}}
+QPushButton#DangerButton:hover {{ background: {CRIT}; color: #1a0d0d; }}
+
+QPushButton#LinkButton {{
+    background: transparent; border: none; color: {MUTED};
+    text-align: left; padding: 0; text-decoration: underline;
+}}
+QPushButton#LinkButton:hover {{ color: {TEXT}; }}
+
+QCheckBox {{ spacing: 8px; background: transparent; }}
+QCheckBox::indicator {{
+    width: 17px; height: 17px; border-radius: 4px;
+    border: 1px solid {MUTED}; background: #262b34;
+}}
+QCheckBox::indicator:hover {{ border-color: {ACCENT}; }}
+QCheckBox::indicator:checked {{
+    background: {ACCENT}; border-color: {ACCENT}; image: url("{_CHECK}");
+}}
+
+/* Dialogs (update prompt, changelog) — match the dark theme so text is readable. */
+QDialog {{ background: {BG}; }}
+QMessageBox {{ background: {CARD}; }}
+QDialog QLabel, QMessageBox QLabel {{ color: {TEXT}; background: transparent; }}
+
+/* Form controls: keep dark bg + light text (Fusion defaults to light-on-light here). */
+QLineEdit, QPlainTextEdit, QAbstractSpinBox, QComboBox {{
+    background: {INPUT_BG}; color: {TEXT};
+    border: 1px solid {CARD_BORDER}; border-radius: 6px; padding: 5px 8px;
+    selection-background-color: {ACCENT}; selection-color: #06222e;
+}}
+QLineEdit:focus, QPlainTextEdit:focus, QAbstractSpinBox:focus, QComboBox:focus {{
+    border: 1px solid {ACCENT};
+}}
+QLineEdit:disabled, QPlainTextEdit:disabled, QAbstractSpinBox:disabled {{ color: {MUTED}; }}
 """

src/rigdoctor/render.py

@@ -2,21 +2,29 @@
 
 from __future__ import annotations
 
+import time
+
+from .core.crashlog import Summary, headline
 from .core.sample import Reading, Sample
 
 _GROUP_ORDER = ["gpu", "cpu", "memory", "storage"]
 _GROUP_TITLES = {"gpu": "GPU", "cpu": "CPU", "memory": "Memory", "storage": "Storage"}
 
 
+def format_raw(value: float | None, unit: str) -> str:
+    """Format a value + unit for display."""
+    if value is None:
+        return "N/A"
+    if unit == "°C":
+        return f"{value:.1f} °C"
+    if unit:
+        return f"{value:g} {unit}"
+    return f"{value:g}"
+
+
 def format_value(r: Reading) -> str:
     """Format a reading's value + unit for display (shared by CLI and GUI)."""
-    if r.value is None:
-        return "N/A"
-    if r.unit == "°C":
-        return f"{r.value:.1f} °C"
-    if r.unit:
-        return f"{r.value:g} {r.unit}"
-    return f"{r.value:g}"
+    return format_raw(r.value, r.unit)
 
 
 def metric_label(r: Reading) -> str:
@@ -41,3 +49,110 @@ def render_snapshot(sample: Sample) -> str:
         lines = [title] + [_fmt(r) for r in groups[key]]
         blocks.append("\n".join(lines))
     return "\n\n".join(blocks)
+
+
+def format_headline(h: dict) -> str:
+    """One-line headline summary from a headline() dict."""
+
+    def g(value, unit):
+        return format_raw(value, unit) if value is not None else "—"
+
+    return (
+        f"GPU {g(h.get('gpu_temp'), '°C')} {g(h.get('gpu_util'), '%')} {g(h.get('gpu_power'), 'W')}"
+        f"  ·  CPU {g(h.get('cpu_temp'), '°C')}  ·  MEM {g(h.get('mem_pct'), '%')}"
+    )
+
+
+def _fmt_duration(seconds: float) -> str:
+    seconds = int(seconds)
+    h, rem = divmod(seconds, 3600)
+    m, s = divmod(rem, 60)
+    if h:
+        return f"{h}h {m}m {s}s"
+    if m:
+        return f"{m}m {s}s"
+    return f"{s}s"
+
+
+# Metrics worth surfacing as session peaks (by metric name within reading.key).
+_PEAK_METRICS = ("temp", "power", "util", "mem_util", "fan", "used_pct")
+_SOURCE_ORDER = {"gpu": 0, "cpu": 1, "memory": 2, "storage": 3}
+
+
+def _aggregate_peaks(maxima: dict) -> list[tuple[str, str, float, str, float, str]]:
+    """Collapse per-label maxima to the single worst value per (source, metric).
+
+    Returns rows of (source, metric, value, unit, ts, label) in display order.
+    """
+    agg: dict[tuple[str, str], tuple[float, str, float, str]] = {}
+    for key, (value, unit, ts) in maxima.items():
+        parts = key.split(".")
+        if len(parts) < 2 or parts[1] not in _PEAK_METRICS:
+            continue
+        source, metric = parts[0], parts[1]
+        label = ".".join(parts[2:])
+        current = agg.get((source, metric))
+        if current is None or value > current[0]:
+            agg[(source, metric)] = (value, unit, ts, label)
+    rows = [(s, m, v, u, ts, lbl) for (s, m), (v, u, ts, lbl) in agg.items()]
+    rows.sort(key=lambda r: (_SOURCE_ORDER.get(r[0], 9), r[1]))
+    return rows
+
+
+_SEV_LABEL = {"critical": "CRITICAL", "warning": "WARNING", "info": "INFO", "ok": "OK"}
+
+
+def render_health(findings: list) -> str:
+    if not findings:
+        return "Health report: no findings."
+    crit = sum(1 for f in findings if f.severity == "critical")
+    warn = sum(1 for f in findings if f.severity == "warning")
+    lines = ["Health report", "", f"  {crit} critical · {warn} warning · {len(findings)} checks", ""]
+    for f in findings:
+        lines.append(f"[{_SEV_LABEL.get(f.severity, '?')}] {f.category}: {f.title}")
+        if f.detail:
+            lines.append(f"    {f.detail}")
+        if f.suggestion:
+            lines.append(f"    → {f.suggestion}")
+        lines.append("")
+    return "\n".join(lines).rstrip()
+
+
+def render_summary(summary: Summary, log_path=None) -> str:
+    if summary.samples == 0 and not summary.events:
+        where = f" ({log_path})" if log_path else ""
+        return f"No capture data found{where}. Start one with: rigdoctor record start"
+
+    lines: list[str] = ["Crash-capture report", ""]
+    if summary.start and summary.end:
+        start = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(summary.start))
+        end = time.strftime("%H:%M:%S", time.localtime(summary.end))
+        lines.append(f"  Window   : {start}  →  {end}  ({_fmt_duration(summary.end - summary.start)})")
+    lines.append(f"  Samples  : {summary.samples}")
+    if log_path:
+        lines.append(f"  Log      : {log_path}")
+
+    if summary.events:
+        lines += ["", "Events"]
+        for ts, kind, detail in summary.events:
+            stamp = time.strftime("%H:%M:%S", time.localtime(ts)) if ts else "--:--:--"
+            mark = " ⚠" if "lost" in kind else "  "
+            suffix = f" — {detail}" if detail else ""
+            lines.append(f" {mark} {stamp}  {kind}{suffix}")
+
+    peaks = _aggregate_peaks(summary.maxima)
+    if peaks:
+        lines += ["", "Peaks (session maximum)"]
+        for source, metric, value, unit, ts, label in peaks:
+            stamp = time.strftime("%H:%M:%S", time.localtime(ts)) if ts else ""
+            detail = f"  ({label})" if label else ""
+            name = f"{source} {metric}"
+            lines.append(f"  {name:<16} {format_raw(value, unit):>10}   at {stamp}{detail}")
+
+    if summary.last:
+        lines += ["", f"Last {len(summary.last)} samples (most recent last)"]
+        for sample in summary.last:
+            stamp = time.strftime("%H:%M:%S", time.localtime(sample.ts)) if sample.ts else "--:--:--"
+            lines.append(f"  {stamp}  {format_headline(headline(sample))}")
+
+    return "\n".join(lines)

tests/test_alerts.py

@@ -0,0 +1,38 @@
+"""Tests for the M8 alert monitor (edge-triggered; notify mocked)."""
+
+import unittest
+from unittest import mock
+
+from rigdoctor.core import alerts
+from rigdoctor.core.sample import Reading, Sample
+
+
+def _gpu(temp):
+    return Sample(readings=[Reading("gpu", "temp", temp, "°C")])
+
+
+class AlertTests(unittest.TestCase):
+    @mock.patch.object(alerts, "notify")
+    def test_edge_triggered_no_repeat(self, m):
+        mon = alerts.AlertMonitor(gpu_temp=90.0, cooldown=0.0)
+        mon.check(_gpu(95))   # fires
+        mon.check(_gpu(96))   # still hot — no repeat while active
+        self.assertEqual(m.call_count, 1)
+        mon.check(_gpu(50))   # clears
+        mon.check(_gpu(95))   # hot again — fires
+        self.assertEqual(m.call_count, 2)
+
+    @mock.patch.object(alerts, "notify")
+    def test_no_alert_below_threshold(self, m):
+        alerts.AlertMonitor(gpu_temp=90.0).check(_gpu(70))
+        m.assert_not_called()
+
+    @mock.patch.object(alerts, "notify")
+    def test_gpu_lost(self, m):
+        mon = alerts.AlertMonitor()
+        mon.check(Sample(readings=[Reading("gpu", "status", None, "", "query-timeout")]))
+        m.assert_called_once()
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_config.py

@@ -0,0 +1,32 @@
+"""Tests for config save/load (flat TOML writer)."""
+
+import tempfile
+import unittest
+from pathlib import Path
+from unittest import mock
+
+from rigdoctor import config
+
+
+class ConfigTests(unittest.TestCase):
+    def test_save_load_round_trip(self):
+        with tempfile.TemporaryDirectory() as d:
+            cf = Path(d) / "config.toml"
+            with mock.patch.object(config, "CONFIG_FILE", cf), mock.patch.object(config, "CONFIG_DIR", Path(d)):
+                config.save_config({"alerts_enabled": False, "gpu_temp_alert": 88.0, "update_check_minutes": 5})
+                loaded = config.load_config()
+                self.assertIs(loaded["alerts_enabled"], False)
+                self.assertEqual(loaded["gpu_temp_alert"], 88.0)
+                self.assertEqual(loaded["update_check_minutes"], 5)
+
+    def test_update_config_merges_and_keeps_defaults(self):
+        with tempfile.TemporaryDirectory() as d:
+            cf = Path(d) / "config.toml"
+            with mock.patch.object(config, "CONFIG_FILE", cf), mock.patch.object(config, "CONFIG_DIR", Path(d)):
+                config.update_config(cpu_temp_alert=70.0)
+                self.assertEqual(config.load_config()["cpu_temp_alert"], 70.0)
+                self.assertEqual(config.load_config()["gpu_temp_alert"], 90.0)  # default preserved
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_crashlog.py

@@ -0,0 +1,103 @@
+"""Tests for the M3 crash-capture log: writer, rotation, reader, summary, recorder."""
+
+import tempfile
+import threading
+import time
+import unittest
+from pathlib import Path
+
+from rigdoctor.core.crashlog import CrashLogWriter, iter_records, summarize
+from rigdoctor.core.recorder import Recorder
+from rigdoctor.core.sample import Reading, Sample
+from rigdoctor.core.sampler import Sampler
+from rigdoctor.core.sources.base import Source
+
+
+class _FakeSource(Source):
+    name = "gpu"
+
+    def __init__(self, temp=50.0):
+        self._temp = temp
+
+    def probe(self):
+        return True
+
+    def read(self):
+        return [
+            Reading("gpu", "name", None, "", "Fake GPU"),
+            Reading("gpu", "temp", self._temp, "°C"),
+            Reading("gpu", "power", 100.0, "W"),
+        ]
+
+
+class CrashLogTests(unittest.TestCase):
+    def test_write_and_read_roundtrip(self):
+        with tempfile.TemporaryDirectory() as d:
+            path = Path(d) / "capture.jsonl"
+            w = CrashLogWriter(path)
+            w.write_event("session-start")
+            w.write_sample(Sample(ts=1.0, readings=[Reading("gpu", "temp", 60.0, "°C")]))
+            w.write_event("gpu-lost", "timeout")
+            w.close()
+
+            records = list(iter_records(path))
+            self.assertEqual(records[0]["event"], "session-start")
+            self.assertEqual(records[1]["readings"][0], ["gpu", "temp", 60.0, "°C", ""])
+            self.assertEqual(records[2]["event"], "gpu-lost")
+
+    def test_rotation_bounds_segments(self):
+        with tempfile.TemporaryDirectory() as d:
+            path = Path(d) / "capture.jsonl"
+            w = CrashLogWriter(path, max_bytes=200, backups=2)
+            for i in range(200):
+                w.write_sample(Sample(ts=float(i), readings=[Reading("gpu", "temp", float(i), "°C")]))
+            w.close()
+            # base + at most `backups` rotated segments
+            segments = list(Path(d).glob("capture.jsonl*"))
+            self.assertLessEqual(len(segments), 3)
+            self.assertTrue((Path(d) / "capture.jsonl").exists())
+            # rotation must not lose readability across segments
+            samples = [r for r in iter_records(path) if "readings" in r]
+            self.assertGreater(len(samples), 0)
+
+    def test_summary_tracks_peaks_and_events(self):
+        with tempfile.TemporaryDirectory() as d:
+            path = Path(d) / "capture.jsonl"
+            w = CrashLogWriter(path)
+            w.write_sample(Sample(ts=1.0, readings=[Reading("gpu", "temp", 60.0, "°C")]))
+            w.write_sample(Sample(ts=2.0, readings=[Reading("gpu", "temp", 81.0, "°C")]))
+            w.write_event("gpu-lost", "timeout")
+            w.close()
+
+            s = summarize(path)
+            self.assertEqual(s.samples, 2)
+            self.assertEqual(s.maxima["gpu.temp"][0], 81.0)
+            self.assertEqual(s.events[0][1], "gpu-lost")
+            self.assertEqual(len(s.last), 2)
+
+    def test_recorder_writes_samples_and_stops(self):
+        with tempfile.TemporaryDirectory() as d:
+            path = Path(d) / "capture.jsonl"
+            status = Path(d) / "status.json"
+            rec = Recorder(
+                interval=0.02,
+                log_path=path,
+                status_path=status,
+                sampler=Sampler([_FakeSource()]),
+            )
+            t = threading.Thread(target=rec.run)
+            t.start()
+            time.sleep(0.2)
+            rec.stop()
+            t.join(timeout=2)
+
+            self.assertFalse(t.is_alive())
+            self.assertGreater(rec.samples, 0)
+            self.assertTrue(status.exists())
+            kinds = [r.get("event") for r in iter_records(path) if "event" in r]
+            self.assertIn("session-start", kinds)
+            self.assertIn("session-stop", kinds)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_health.py

@@ -0,0 +1,46 @@
+"""Tests for the M4 health report's log scanner (synthetic input)."""
+
+import unittest
+
+from rigdoctor.core.health import CRITICAL, WARNING, run_health_checks, scan_journal_text
+
+
+class HealthScanTests(unittest.TestCase):
+    def test_xid_79_is_critical(self):
+        text = "NVRM: Xid (PCI:0000:01:00): 79, pid=1234, GPU has fallen off the bus."
+        findings = scan_journal_text(text)
+        gpu = [f for f in findings if f.category == "GPU"]
+        self.assertEqual(len(gpu), 1)
+        self.assertIn("79", gpu[0].title)
+        self.assertEqual(gpu[0].severity, CRITICAL)
+
+    def test_xid_count_aggregates(self):
+        text = "\n".join(["NVRM: Xid (PCI:0000:01:00): 79, foo"] * 3)
+        gpu = [f for f in scan_journal_text(text) if f.category == "GPU"][0]
+        self.assertIn("×3", gpu.title)
+
+    def test_oom_and_panic_detected(self):
+        text = "Out of memory: Killed process 999 (game)\nKernel panic - not syncing: x"
+        cats = {f.category for f in scan_journal_text(text)}
+        self.assertIn("Memory", cats)
+        self.assertIn("Kernel", cats)
+
+    def test_mce_critical(self):
+        findings = scan_journal_text("mce: [Hardware Error]: Machine check events logged")
+        self.assertTrue(any(f.severity == CRITICAL and f.category == "Hardware" for f in findings))
+
+    def test_clean_text_yields_no_findings(self):
+        self.assertEqual(scan_journal_text("usb 1-1: new high-speed USB device\nbluetooth: ok"), [])
+
+    def test_run_health_checks_returns_findings(self):
+        # Runs against the real system; just assert it returns a sorted list of Findings.
+        findings = run_health_checks()
+        self.assertIsInstance(findings, list)
+        severities = [f.severity for f in findings]
+        order = {"critical": 0, "warning": 1, "info": 2, "ok": 3}
+        ranks = [order.get(s, 9) for s in severities]
+        self.assertEqual(ranks, sorted(ranks))
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_installer.py

@@ -0,0 +1,46 @@
+"""Tests for the M9 installer logic and the M13 version comparison."""
+
+import unittest
+
+from rigdoctor.core import installer
+from rigdoctor.core.catalog import Component
+from rigdoctor.core.updates import is_newer
+
+
+class InstallerTests(unittest.TestCase):
+    def test_component_status_uses_presence(self):
+        status = installer.component_status(present=lambda cmd: cmd == "smartctl")
+        by_id = {c.id: ok for c, ok in status}
+        self.assertTrue(by_id["smartmontools"])
+        self.assertFalse(by_id["dmidecode"])
+
+    def test_missing_packages_dedup_preserves_order(self):
+        comps = [
+            Component("a", "A", "B", "x", ("p1", "p2"), "c1"),
+            Component("b", "B", "B", "y", ("p2", "p3"), "c2"),
+        ]
+        self.assertEqual(installer.missing_packages(comps), ["p1", "p2", "p3"])
+
+    def test_apt_command_includes_packages(self):
+        joined = " ".join(installer.apt_install_command(["smartmontools", "dmidecode"]))
+        self.assertIn("smartmontools", joined)
+        self.assertIn("dmidecode", joined)
+        self.assertIn("apt-get install", joined)
+
+    def test_install_nothing_is_noop(self):
+        rc, _ = installer.install_packages([])
+        self.assertEqual(rc, 0)
+
+
+class UpdateTests(unittest.TestCase):
+    def test_is_newer(self):
+        self.assertTrue(is_newer("v0.0.5", "0.0.4"))
+        self.assertFalse(is_newer("v0.0.4", "0.0.4"))
+        self.assertFalse(is_newer("v0.0.3", "0.0.4"))
+
+    def test_is_newer_handles_garbage(self):
+        self.assertFalse(is_newer("not-a-version", "0.0.4"))
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_inventory.py

@@ -0,0 +1,30 @@
+"""Tests for the M5 system inventory (render + dict round-trip; collect on real system)."""
+
+import unittest
+
+from rigdoctor.core import inventory
+from rigdoctor.core.inventory import Section
+
+
+class InventoryTests(unittest.TestCase):
+    def test_collect_returns_sections(self):
+        sections = inventory.collect()
+        self.assertTrue(sections)
+        titles = {s.title for s in sections}
+        self.assertIn("System", titles)
+        self.assertIn("CPU", titles)
+
+    def test_dict_round_trip(self):
+        sections = [Section("System", [("Kernel", "7.0.0"), ("Distro", "Ubuntu")])]
+        restored = inventory.from_dict(inventory.to_dict(sections))
+        self.assertEqual(restored[0].title, "System")
+        self.assertEqual(restored[0].items, [("Kernel", "7.0.0"), ("Distro", "Ubuntu")])
+
+    def test_render_markdown(self):
+        md = inventory.render_markdown([Section("CPU", [("Model", "Test CPU")])])
+        self.assertIn("## CPU", md)
+        self.assertIn("- **Model:** Test CPU", md)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_pty_session.py

@@ -0,0 +1,27 @@
+"""Tests for the host PTY session (M12 Tier 3)."""
+
+import time
+import unittest
+
+from rigdoctor.core.pty_session import PtySession
+
+
+class PtySessionTests(unittest.TestCase):
+    def test_runs_command_and_reads_output(self):
+        pty = PtySession(rows=24, cols=80)
+        try:
+            time.sleep(0.4)
+            pty.read()  # drain the shell prompt
+            pty.write(b"echo PTY_MARKER_42\n")
+            deadline = time.time() + 3
+            buf = ""
+            while time.time() < deadline and "PTY_MARKER_42" not in buf:
+                time.sleep(0.1)
+                buf += pty.read().decode(errors="replace")
+            self.assertIn("PTY_MARKER_42", buf)
+        finally:
+            pty.close()
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_relay_frames.py

@@ -0,0 +1,38 @@
+"""Tests for M12 relay frames + guest HTML rendering (host/guest data shapes)."""
+
+import json
+import unittest
+
+from rigdoctor.core import share
+from rigdoctor.core.sampler import Sampler
+from rigdoctor.core.sources import available_sources
+
+
+class RelayFrameTests(unittest.TestCase):
+    def setUp(self):
+        self.sampler = Sampler(available_sources())
+
+    def test_full_frame_shape(self):
+        frame = json.loads(share.host_full_frame(self.sampler))
+        self.assertEqual(frame["type"], "full")
+        self.assertIn("groups", frame["snapshot"])
+        self.assertIsInstance(frame["report"], list)
+        self.assertIsInstance(frame["inventory"], dict)
+
+    def test_snapshot_frame_shape(self):
+        frame = json.loads(share.host_snapshot_frame(self.sampler))
+        self.assertEqual(frame["type"], "snapshot")
+        self.assertIn("groups", frame["snapshot"])
+
+    def test_guest_html_renders(self):
+        snap = {"groups": {"gpu": [{"name": "temp", "value": 51.0, "unit": "°C"}]}}
+        report = [{"severity": "ok", "category": "Logs", "title": "No errors"}]
+        inv = {"System": {"Kernel": "7.0.0"}}
+        html = share.guest_html(snap, report, inv)
+        self.assertIn("51.0 °C", html)
+        self.assertIn("No errors", html)
+        self.assertIn("Kernel", html)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_share.py

@@ -0,0 +1,46 @@
+"""Tests for M12 Tier 2 share server: token gating + endpoints."""
+
+import json
+import threading
+import unittest
+import urllib.error
+import urllib.request
+
+from rigdoctor.core import share
+
+
+class ShareServerTests(unittest.TestCase):
+    def setUp(self):
+        self.srv, self.token = share.make_server("127.0.0.1", 0)
+        self.port = self.srv.server_address[1]
+        self.thread = threading.Thread(target=self.srv.serve_forever, daemon=True)
+        self.thread.start()
+
+    def tearDown(self):
+        self.srv.shutdown()
+
+    def _url(self, path, token=None):
+        q = f"?t={token}" if token else ""
+        return f"http://127.0.0.1:{self.port}{path}{q}"
+
+    def test_requires_token(self):
+        with self.assertRaises(urllib.error.HTTPError) as cm:
+            urllib.request.urlopen(self._url("/api/snapshot"), timeout=10)
+        self.assertEqual(cm.exception.code, 403)
+
+    def test_bad_token_rejected(self):
+        with self.assertRaises(urllib.error.HTTPError) as cm:
+            urllib.request.urlopen(self._url("/api/snapshot", "wrong"), timeout=10)
+        self.assertEqual(cm.exception.code, 403)
+
+    def test_snapshot_with_token(self):
+        data = json.load(urllib.request.urlopen(self._url("/api/snapshot", self.token), timeout=10))
+        self.assertIn("groups", data)
+
+    def test_page_served(self):
+        body = urllib.request.urlopen(self._url("/", self.token), timeout=10).read()
+        self.assertIn(b"read-only share", body)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_token.py

@@ -0,0 +1,36 @@
+"""Tests for update-token storage (file fallback + env override), keyring mocked out."""
+
+import os
+import tempfile
+import unittest
+from pathlib import Path
+from unittest import mock
+
+from rigdoctor import config
+
+
+class TokenStorageTests(unittest.TestCase):
+    def test_file_fallback_roundtrip(self):
+        with tempfile.TemporaryDirectory() as d:
+            token_file = Path(d) / "token"
+            with mock.patch.object(config, "_secret_tool", return_value=None), \
+                 mock.patch.object(config, "TOKEN_FILE", token_file), \
+                 mock.patch.dict(os.environ, {}, clear=True):
+                self.assertIsNone(config.load_token())
+                config.save_token("abc123")
+                self.assertEqual(config.load_token(), "abc123")
+                self.assertEqual(config.token_backend(), "file")
+                self.assertEqual(token_file.stat().st_mode & 0o777, 0o600)
+                config.clear_token()
+                self.assertIsNone(config.load_token())
+                self.assertEqual(config.token_backend(), "none")
+
+    def test_env_override_wins(self):
+        with mock.patch.object(config, "_secret_tool", return_value=None), \
+             mock.patch.dict(os.environ, {"RIGDOCTOR_TOKEN": "envtok"}, clear=True):
+            self.assertEqual(config.load_token(), "envtok")
+            self.assertEqual(config.token_backend(), "env")
+
+
+if __name__ == "__main__":
+    unittest.main()