Merge pull request 'fix(games): let the GUI Add-game dialog link a launcher & log folder' (#47) from feat/gpu-stress-and-drive-health into main

Reviewed-on: #47

CHANGELOG.md

@@ -5,6 +5,100 @@ All notable changes to RigDoctor are recorded here. Format follows
 (`MAJOR.MINOR.PATCH`, pre-1.0). `__version__` and `pyproject.toml` must match the git
 release tag (so the auto-updater, D18, can compare versions).
 
+## [0.43.0] - 2026-05-29
+### Added
+- **GPU stress test + close thermal monitoring** (`rigdoctor stress`, and a "Stress test…" button
+  on System Health). Runs a GPU load and samples sensors at a high rate (default 0.5 s), then
+  reports per-metric min/avg/**peak**, how long the core spent above each temperature threshold,
+  power vs the limit, throttling (decoded from the NVML clocks-event bitmask), and any GPU **fault**
+  (Xid / VA-space freeze / a query-timeout hang) that hit during the window — the on-demand way to
+  reproduce load-correlated crashes. The load comes from an explicit `--command` (a game or a tool
+  like gpu-burn), an auto-detected loader (gpu-burn/vkmark/glmark2/vkcube), or **monitor-only** when
+  none is found (you launch the game; it tracks temps while you play).
+- **Drive health & wear in the health report.** A new `core/drives.py` parses the full
+  `smartctl --json` for every drive into prioritized findings: the SMART verdict, a derived
+  **life-left %** (NVMe `percentage_used` or the SATA wear-leveling attribute), **power-on hours**,
+  data written (TBW), temperature, and the early-failure predictors (reallocated / pending /
+  offline-uncorrectable sectors, NVMe media errors, low available spare). Replaces the old
+  pass/fail-only SMART check; flows through the same elevated path (GUI launch / `sudo rigdoctor
+  report`), degrading to per-drive "needs root" notes unprivileged.
+
+### Fixed
+- **GUI "Add game…" can now link a launcher.** The dialog only asked for a name, so a custom
+  game (e.g. SPT) couldn't be given its launch command or log folder from the app — those were
+  CLI-only, leaving it unlaunchable from the GUI. It's now a proper form: name + an optional
+  launch command/script (with a **Browse…** file picker) + an optional log folder (auto-detected
+  from the script's folder when left blank).
+
+## [0.42.0] - 2026-05-29
+### Added
+- **Detect hard freezes that log no Xid.** The kernel-log scanner caught Xid codes, OOM, panic,
+  MCE, PCIe AER, thermal events, and amdgpu resets — but a crash that logs *no* Xid slipped
+  through. It now flags the NVIDIA open-kernel-module **VA-space mapping fault** (`gpu_vaspace.c`
+  / `dmaAllocMapping` assertions, NVKMS GEM-allocation failures) — a driver-internal error that
+  can storm for minutes and end in a freeze without the GPU ever "falling off the bus" (distinct
+  from Xid 79). A new `check_nvidia_module()` notes when the open module (`nvidia-*-open`) is
+  loaded — the context behind these faults — and a new `ai_knowledge` entry lets the assistant
+  tell the no-Xid freeze apart from the Xid 79 hardware drop.
+- **Add games no launcher reports (e.g. SPT).** A user-authored custom-games list
+  (`core/customgames.py`) shows alongside Steam/Lutris/Heroic in `rigdoctor games` and the GUI
+  ("Add game…"), for standalone mod launchers (Single-Player Tarkov), itch.io downloads, or any
+  hand-installed game. Each entry can carry a launch command and a log directory:
+  `rigdoctor games add "SPT" --command .../tarkov.sh` (a sibling `logs/` is auto-detected),
+  `rigdoctor games play "SPT"` launches it under the crash-capture wrapper (tagged with the real
+  name, not the script's), and the diagnostic now tails the game's *own* logs — SPT's
+  server/launcher logs — alongside the kernel log so the analysis sees what the game logged
+  before the freeze.
+
+## [0.41.0] - 2026-05-25
+### Added
+- **Import a crash dump (`.dmp`) and explain it with AI.** The **Games** page gains an
+  "Import crash dump…" button (shown once an AI provider is configured) that opens a Windows
+  minidump — the kind a Proton/Wine game writes when it hard-crashes — parses it, and hands the
+  result to the opt-in AI assistant (D24; cloud sends still ask first). A new stdlib
+  `core/minidump.py` reads the `MDMP` streams with `struct` (no new deps): the exception / crash
+  reason (e.g. access violation `0xC0000005`), the **faulting module** (which DLL the crash
+  address lands in — `nvwgf2umx.dll`, `d3d11.dll`, an anticheat, the game's own `.exe`…), OS/CPU,
+  and the loaded-module list. If `minidump_stackwalk` (Breakpad) or `minidump-stackwalk`
+  (rust-minidump) is on PATH, its fuller report is appended best-effort. The model is told the
+  dump came from a Windows process under Proton, so fixes stay Linux/Proton-side (Proton version,
+  DXVK/VKD3D, driver, launch options) — never Windows admin/registry steps. New `ai_knowledge`
+  facts cover the common exception codes and faulting-module signatures. CLI parity:
+  `rigdoctor ai dump <file>`.
+
+## [0.40.0] - 2026-05-22
+### Added
+- **RAM speed / XMP-EXPO check.** Inventory now shows each module's configured speed and, when it's
+  below the rated speed, the rating (e.g. `4800 MT/s (rated 5600)`); **System Health** flags it
+  ("RAM at 4800 MT/s (rated 5600 MT/s)") with the fix — enable XMP/EXPO in BIOS. With the profile
+  off, dmidecode only reports the JEDEC base, so the rated speed is read from both dmidecode and
+  the part number (matched against known DDR5 speed grades, so no false positives). Needs dmidecode
+  (root / launch elevation). Completes the "underperforming hardware" trio with PCIe gen + refresh.
+
+## [0.39.0] - 2026-05-22
+### Added
+- **Displays in the Inventory.** A new `core/displays.py` lists each connected monitor with its
+  resolution and current/max refresh — e.g. `DP-1 · Samsung LC34G55T → 3440x1440 @ 165 Hz`. Reads
+  GNOME's Mutter `DisplayConfig` over D-Bus (works on X11 *and* Wayland), falling back to `xrandr`
+  on other X11 desktops.
+- **System Health flags monitors below their max refresh.** If a monitor supports a higher refresh
+  at its current resolution (e.g. a 165 Hz panel set to 60 Hz — an easily-missed gaming setting),
+  Health reports it with the fix (raise it in Display settings). Max is computed at the *current*
+  resolution, so it never suggests dropping resolution.
+
+## [0.38.0] - 2026-05-22
+### Added
+- **PCIe link in the Inventory.** Each NVMe drive now shows its negotiated PCIe link next to the
+  model — e.g. `Samsung SSD 980 PRO 1TB (931.5G) · PCIe Gen4 x4` — read from sysfs
+  (`current/max_link_speed` + width). If a drive negotiates below its capability (a slower M.2
+  slot, lane-sharing, or a downtrain) it's flagged: `PCIe Gen3 x4 (capable of Gen4 x4)`. So you
+  can confirm a Gen4 SSD is actually in a Gen4 slot. (SATA disks show no PCIe link.)
+- **System Health flags downtrained NVMe links.** A new check warns when an NVMe drive negotiates
+  fewer PCIe lanes than it supports (almost always motherboard **lane-sharing** — a GPU/second
+  card or another M.2 stealing lanes) and notes speed-only reductions as info (a slower slot or
+  idle ASPM). The GPU is deliberately excluded — NVIDIA drops its PCIe gen/width at idle, so a
+  snapshot would false-alarm.
+
 ## [0.37.1] - 2026-05-22
 ### Fixed
 - **`rigdoctor update` now uses the right method for how RigDoctor was installed.** It detects

README.md

@@ -24,11 +24,22 @@ freeze are usually lost. RigDoctor pulls it together and keeps the evidence.
 - **Proactive alerts** — desktop notifications on overheating and critical kernel events
   (GPU-lost, Xid, out-of-memory, disk I/O).
 - **AI explanations** *(optional, opt-in)* — explain a diagnostic in plain language with a
-  **local model (Ollama)** or **Claude**. Never automatic; only when you press the button.
+  **local model (Ollama)** or **Claude**, or **import a Windows crash dump (`.dmp`)** from a
+  Proton game and have it parsed and analysed. Never automatic; only when you press the button.
 - **Shareable reports** — zip a diagnostic (logs, inventory, AI transcript) to hand to someone,
   or share a live **terminal session** for remote help.
 - **Self-updating** — `apt upgrade`, or the in-app updater.
 
+## Screenshots
+
+| Dashboard | Inventory |
+|---|---|
+| ![Dashboard — live sensors](assets/screenshots/dashboard.png) | ![Inventory — hardware/OS](assets/screenshots/inventory.png) |
+
+**Share** — a read-only or interactive terminal session over the relay, for remote help:
+
+![Share — shared terminal session](assets/screenshots/share.png)
+
 ## Install
 
 ### Debian / Ubuntu — `.deb`
@@ -41,30 +52,20 @@ apt pulls the GUI dependencies (PySide6, pyte) automatically:
 sudo apt install ./rigdoctor_*_all.deb        # CLI only: add --no-install-recommends
 ```
 
-**Or add the apt repository** for `apt install` + automatic updates. The registry is public and
+**Or add the apt repository** for `apt install` + automatic updates (the registry is public and
-GPG-signed — no token needed; just add the signing key and a deb822 source:
+GPG-signed — no token needed):
 
 ```bash
-# signing key → dearmored into the keyring
+sudo curl https://git.jesseyvanofferen.com/api/packages/jessey/debian/repository.key -o /etc/apt/keyrings/gitea-jessey.asc
-sudo install -d -m 0755 /etc/apt/keyrings
+echo "deb [arch=all signed-by=/etc/apt/keyrings/gitea-jessey.asc] https://git.jesseyvanofferen.com/api/packages/jessey/debian stable main" | sudo tee /etc/apt/sources.list.d/gitea.list
-curl -fsSL https://git.jesseyvanofferen.com/api/packages/jessey/debian/repository.key \
+sudo apt update
-  | sudo gpg --dearmor -o /etc/apt/keyrings/gitea-jessey.gpg
+sudo apt install rigdoctor
-
-# the source (modern deb822 format, GPG-verified, all-arch)
-sudo tee /etc/apt/sources.list.d/rigdoctor.sources >/dev/null <<'EOF'
-Types: deb
-URIs: https://git.jesseyvanofferen.com/api/packages/jessey/debian
-Suites: stable
-Components: main
-Architectures: all
-Signed-By: /etc/apt/keyrings/gitea-jessey.gpg
-EOF
-
-sudo apt update && sudo apt install rigdoctor
 ```
 
 Then `sudo apt upgrade` keeps it current.
 
+Then `sudo apt upgrade` keeps it current.
+
 ### Any distro — self-extracting `.run` (no root)
 
 Download **`rigdoctor-<version>-installer.run`** from the releases page and run it. It installs

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "rigdoctor"
-version = "0.37.1"
+version = "0.43.0"
 description = "Modular hardware monitoring & crash diagnostics for Linux gamers."
 readme = "README.md"
 requires-python = ">=3.11"

src/rigdoctor/__init__.py

@@ -1,3 +1,3 @@
 """RigDoctor — modular hardware monitoring & crash diagnostics for Linux gamers."""
 
-__version__ = "0.37.1"
+__version__ = "0.43.0"

src/rigdoctor/cli.py

@@ -298,10 +298,10 @@ 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 import drives
     from .core.inventory import _dmidecode
 
-    data = {"smart": [asdict(f) for f in check_smart()], "dmidecode": _dmidecode()}
+    data = {"drives": [asdict(d) for d in drives.collect()], "dmidecode": _dmidecode()}
     print(json.dumps(data))
     return 0
 
@@ -466,6 +466,20 @@ def cmd_ai(args) -> int:
         print(msg)
         return 0 if ok else 1
 
+    if sub == "dump":
+        # Parse a Windows .dmp minidump (e.g. from a Proton game crash) and explain it.
+        from .core import minidump
+
+        report = minidump.parse(args.file)
+        if not report.ok:
+            print(f"Couldn't analyze the dump — {report.error}")
+            return 1
+        print(minidump.to_text(report))
+        print(f"\nAsking {ai.provider_label()} to explain {os.path.basename(args.file)}…\n")
+        ok, msg = ai.explain(minidump.to_ai_text(report))
+        print(msg)
+        return 0 if ok else 1
+
     # explain: gather the current health findings and ask the provider to explain them.
     from .core import health
 
@@ -511,13 +525,13 @@ def cmd_gameenv(args) -> int:
 def cmd_games(args) -> int:
     from dataclasses import asdict
 
-    from .core import launchers, steam
+    from .core import customgames, launchers, steam
 
     selected = steam.selected_library_paths()
     result = steam.rescan() if selected else None
     steam_games = result.games if result else []
     extra = launchers.scan()  # non-Steam (Lutris/Heroic)
-    all_games = list(steam_games) + list(extra)
+    all_games = list(steam_games) + list(extra) + customgames.scan()  # + user-added (SPT etc.)
 
     if args.json:
         print(json.dumps({
@@ -582,6 +596,91 @@ def cmd_games_libraries(args) -> int:
     return 0
 
 
+def cmd_games_add(args) -> int:
+    from .core import customgames
+
+    if customgames.add(args.name, command=args.command, logdir=args.logdir):
+        print(f"Added '{args.name}' to your games (custom). It'll show in `rigdoctor games` "
+              "and the diagnostic game picker.")
+        entry = customgames.get(args.name) or {}
+        if entry.get("command"):
+            print(f"  launch:  {entry['command']}   (run with: rigdoctor games play \"{args.name}\")")
+        if entry.get("logdir"):
+            print(f"  logs:    {entry['logdir']}   (included in crash diagnostics)")
+        return 0
+    print(f"'{args.name}' is blank or already in your custom games.")
+    return 1
+
+
+def cmd_games_play(args) -> int:
+    from .core import customgames, wrap
+
+    command = customgames.command(args.name)
+    if command is None:
+        if customgames.get(args.name) is None:
+            print(f"'{args.name}' isn't in your custom games. Add it: "
+                  f"rigdoctor games add \"{args.name}\" --command <launch script>")
+        else:
+            print(f"'{args.name}' has no launch command. Set one: "
+                  f"rigdoctor games remove \"{args.name}\" && rigdoctor games add \"{args.name}\" "
+                  "--command <launch script>")
+        return 1
+    print(f"Launching '{args.name}' with crash-capture… (capture stops cleanly on exit; "
+          "a hard freeze is flagged next time you open RigDoctor)")
+    return wrap.run(command, game=args.name)
+
+
+def cmd_games_remove(args) -> int:
+    from .core import customgames
+
+    if customgames.remove(args.name):
+        print(f"Removed '{args.name}' from your custom games.")
+        return 0
+    print(f"'{args.name}' isn't in your custom games. Current: {', '.join(customgames.names()) or '(none)'}")
+    return 1
+
+
+def cmd_stress(args) -> int:
+    import shlex as _shlex
+
+    from .core import stress
+    from .render import format_raw, render_stress
+
+    command = _shlex.split(args.command) if args.command else None
+    if not args.json:
+        loaders = stress.available_loaders()
+        if command:
+            print(f"Stressing with: {' '.join(command)}")
+        elif loaders:
+            print(f"Stressing with auto-detected loader: {loaders[0]}")
+        else:
+            print("No GPU load tool found and no --command given — MONITOR-ONLY mode.")
+            print(f"  Launch the game/app now; I'll closely track temps for up to {int(args.duration)}s.")
+        print(f"  Sampling every {args.interval:g}s. Press Ctrl-C to stop early.\n")
+
+    def _tick(sample, elapsed) -> None:
+        by = {r.key: r for r in sample.readings}
+        bits = [f"{elapsed:5.0f}s"]
+        for key, tag in (("gpu.temp", "core"), ("gpu.power", "pwr"),
+                         ("gpu.util", "util"), ("gpu.clock.core", "clk")):
+            r = by.get(key)
+            if r is not None and r.value is not None:
+                bits.append(f"{tag} {format_raw(r.value, r.unit)}")
+        print("  " + "   ".join(bits) + "        ", end="\r", flush=True)
+
+    result = stress.run(duration=args.duration, interval=args.interval, command=command,
+                        on_tick=None if args.json else _tick)
+    if not args.json:
+        print()  # end the live line
+
+    if args.json:
+        from dataclasses import asdict
+        print(json.dumps(asdict(result), indent=2, ensure_ascii=False))
+    else:
+        print(render_stress(result))
+    return 0 if result.severity in ("ok", "info") else 1
+
+
 def build_parser() -> argparse.ArgumentParser:
     p = argparse.ArgumentParser(
         prog="rigdoctor",
@@ -599,6 +698,14 @@ def build_parser() -> argparse.ArgumentParser:
     mp.add_argument("--plain", action="store_true", help="plain redraw instead of the curses UI")
     mp.set_defaults(func=cmd_monitor)
 
+    st = sub.add_parser("stress", help="GPU stress + close thermal monitoring (repro load crashes)")
+    st.add_argument("-d", "--duration", type=float, default=120.0, help="run for this many seconds (default 120)")
+    st.add_argument("-n", "--interval", type=float, default=0.5, help="sampling interval in seconds (default 0.5)")
+    st.add_argument("--command", default=None,
+                    help="load generator to run (e.g. a game or 'gpu-burn 60'); omit to auto-detect or monitor-only")
+    st.add_argument("--json", action="store_true", help="output JSON")
+    st.set_defaults(func=cmd_stress)
+
     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)
 
@@ -667,6 +774,20 @@ def build_parser() -> argparse.ArgumentParser:
     lib_p.add_argument("--json", action="store_true", help="output JSON")
     lib_p.set_defaults(func=cmd_games_libraries)
 
+    add_p = games_sub.add_parser("add", help="add a game no launcher reports (e.g. SPT)")
+    add_p.add_argument("name", help="game name, e.g. \"SPT\"")
+    add_p.add_argument("--command", default=None,
+                       help="launch command/script (e.g. the path to tarkov.sh) — enables `games play`")
+    add_p.add_argument("--logdir", default=None,
+                       help="the game's own log directory (auto-detected as <command dir>/logs if present)")
+    add_p.set_defaults(func=cmd_games_add)
+    play_p = games_sub.add_parser("play", help="launch a custom game with crash-capture (e.g. SPT)")
+    play_p.add_argument("name", help="game name to launch")
+    play_p.set_defaults(func=cmd_games_play)
+    rm_p = games_sub.add_parser("remove", help="remove a previously added custom game")
+    rm_p.add_argument("name", help="game name to remove")
+    rm_p.set_defaults(func=cmd_games_remove)
+
     env_p = sub.add_parser("gameenv", help="gaming environment checks (M6): flag stability/perf settings")
     env_p.add_argument("--json", action="store_true", help="output JSON instead of text")
     env_p.set_defaults(func=cmd_gameenv)
@@ -707,6 +828,9 @@ def build_parser() -> argparse.ArgumentParser:
     ai_sub.add_parser("status", help="show the configured provider (contacts nothing)").set_defaults(func=cmd_ai)
     ai_sub.add_parser("test", help="send a tiny probe to verify connectivity").set_defaults(func=cmd_ai)
     ai_sub.add_parser("explain", help="explain the current health findings with AI").set_defaults(func=cmd_ai)
+    dump_p = ai_sub.add_parser("dump", help="parse a Windows .dmp crash dump and explain it with AI")
+    dump_p.add_argument("file", help="path to the .dmp minidump (e.g. from a Proton game crash)")
+    dump_p.set_defaults(func=cmd_ai)
     ai_p.set_defaults(func=cmd_ai, ai_cmd=None)
 
     bundle_p = sub.add_parser("bundle", help="zip the latest stored diagnostic into a report bundle (M15)")

src/rigdoctor/config.py

@@ -36,6 +36,9 @@ SPAWN_LOG = STATE_DIR / "recorder.out"
 # Gaming environment / game detection (M6) — cached Steam game scan (mutable state,
 # not config: refreshed by the background scan on every launch).
 GAMES_FILE = STATE_DIR / "games.json"
+# User-added games that no launcher reports (e.g. SPT/standalone mod launchers). Authored
+# by the user (not a refreshable cache), so it lives in DATA_DIR and persists across scans.
+CUSTOM_GAMES_FILE = DATA_DIR / "custom-games.json"
 
 # Logging & reports (opt-in via `logging_enabled`). App log: rotating file of app events.
 # Each diagnostic is stored under DIAGNOSTICS_DIR/<id>/; "Report" zips one into REPORTS_DIR.

src/rigdoctor/core/ai_knowledge.py

@@ -30,6 +30,14 @@ ENTRIES: list[tuple[tuple[str, ...], str]] = [
     (("xid 8", "xid 62", "xid 63", "xid 64"),
      "These Xid codes commonly indicate VRAM/ECC or memory-training problems — suspect failing "
      "VRAM or an unstable memory overclock."),
+    (("va-space mapping", "gpu_vaspace", "dmaallocmapping", "nvkms memory for gem",
+      "open kernel module", "nvidia open"),
+     "NVIDIA open-kernel-module VA-space mapping errors (gpu_vaspace.c / dmaAllocMapping / "
+     "'Failed to allocate NVKMS memory for GEM object') are a driver-internal fault on the open "
+     "module (nvidia-*-open). They can storm for minutes and end in a HARD FREEZE with NO Xid "
+     "logged — so the GPU never 'falls off the bus', and this is distinct from the Xid 79 "
+     "hardware drop. Fix path: switch from the open to the proprietary NVIDIA kernel module and "
+     "update to the latest driver branch."),
     (("smart 197", "current_pending_sector", "pending sector"),
      "SMART 197 (Current Pending Sector) > 0 = sectors the drive can't read and is waiting to "
      "reallocate — early sign of a failing disk. Back up now and run an extended self-test."),
@@ -76,6 +84,35 @@ ENTRIES: list[tuple[tuple[str, ...], str]] = [
     (("fork without exec", "skipping destruction"),
      "BENIGN: 'pid X != Y, skipping destruction (fork without exec?)' is routine Steam/Proton "
      "process bookkeeping, not an error."),
+    # --- crash-dump (.dmp) reasoning -------------------------------------------------
+    (("access violation", "0xc0000005", "0xc0000006"),
+     "Windows exception 0xC0000005 (access violation) = the game read/wrote/executed memory it "
+     "wasn't allowed to. A write/read to a low address (near 0x0) is a null-pointer dereference, "
+     "usually a game or graphics-driver bug; under Proton it's often a DXVK/VKD3D or Proton-version "
+     "issue. Identify the faulting MODULE to localize the fault."),
+    (("stack overflow", "0xc00000fd"),
+     "Windows exception 0xC00000FD (stack overflow) = unbounded recursion or a huge stack "
+     "allocation in the crashing module — almost always a software bug in that module."),
+    (("0xc0000409", "stack buffer overrun", "fast fail"),
+     "Windows 0xC0000409 (stack buffer overrun / __fastfail) = a security check tripped on memory "
+     "corruption; frequently anticheat or a DRM/overlay injecting into the game. Suspect overlays "
+     "(Steam/Discord/MSI Afterburner-equivalents) and anticheat compatibility under Proton."),
+    (("0xc0000374", "heap corruption"),
+     "Windows 0xC0000374 (heap corruption) = something scribbled over heap memory earlier; the "
+     "crash point is a symptom, not the cause. Often a mod, an injected overlay, or unstable RAM."),
+    (("nvwgf2umx", "nvoglv", "nvd3dum", "nvldumd"),
+     "A faulting NVIDIA user-mode driver DLL (nvwgf2umx/nvoglv/nvd3dum) means the crash happened "
+     "inside the GPU driver under Proton. On Linux this points at the NVIDIA driver + the "
+     "DXVK/VKD3D translation layer: try a different driver branch or Proton/Proton-GE version, "
+     "clear the DXVK shader cache, and revert any GPU overclock/undervolt."),
+    (("easyanticheat", "eac", "battleye", "beclient", "anticheat"),
+     "A faulting anticheat module (EasyAntiCheat/BattlEye) under Proton is usually a compatibility "
+     "problem: confirm the title's anticheat has Proton/Linux support enabled and try the Proton "
+     "version the community recommends for it (often Proton-GE or a specific Valve build)."),
+    (("d3d11.dll", "d3d12.dll", "dxgi.dll", "d3d9.dll", "dxvk", "vkd3d"),
+     "A crash in a Direct3D/DXGI module under Proton runs through DXVK (D3D9/10/11) or VKD3D-Proton "
+     "(D3D12). Try a known-good Proton version, update/override DXVK-VKD3D, clear the shader cache, "
+     "and check the GPU driver — these are the usual fixes for D3D faults on Linux."),
 ]
 
 

src/rigdoctor/core/customgames.py

@@ -0,0 +1,113 @@
+"""User-added games (M6): a manual list for titles no launcher reports.
+
+Some games never show up in a Steam/Lutris/Heroic scan — standalone mod launchers like
+**SPT** (Single-Player Tarkov), itch.io downloads, or any hand-installed executable. This
+module keeps a small user-authored list so those still appear in the game list and can be
+picked for a focused diagnostic, in the same `steam.Game` shape as every other source.
+
+Each entry is a name plus two optionals: a **launch command** (so `rigdoctor games play`
+can start it under the auto-capture wrapper) and a **log directory** (so a crash diagnostic
+can read the game's own logs — e.g. SPT's `logs/tarkov-latest.log`). Stored as JSON in
+`config.CUSTOM_GAMES_FILE`; stdlib only; every reader degrades to [] on a missing/bad file.
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import shlex
+
+from .. import config
+from .steam import Game
+
+LAUNCHER = "custom"
+
+
+def _load() -> list[dict]:
+    try:
+        data = json.loads(config.CUSTOM_GAMES_FILE.read_text())
+    except (OSError, ValueError):
+        return []
+    games = data.get("games") if isinstance(data, dict) else None
+    return [g for g in games if isinstance(g, dict) and g.get("name")] if isinstance(games, list) else []
+
+
+def _save(games: list[dict]) -> None:
+    config.CUSTOM_GAMES_FILE.parent.mkdir(parents=True, exist_ok=True)
+    config.CUSTOM_GAMES_FILE.write_text(json.dumps({"games": games}, indent=2, ensure_ascii=False) + "\n")
+
+
+def names() -> list[str]:
+    """Just the stored names (insertion order preserved)."""
+    return [str(g["name"]) for g in _load()]
+
+
+def get(name: str) -> dict | None:
+    """The stored entry (name + optional command/logdir) for a game, case-insensitive."""
+    name = (name or "").strip().lower()
+    return next((g for g in _load() if str(g["name"]).lower() == name), None)
+
+
+def add(name: str, command: str | None = None, logdir: str | None = None) -> bool:
+    """Add a game by name, with an optional launch command and log directory.
+
+    Returns False if the name is blank or already present (case-insensitive). When a command
+    is given but no logdir, a sibling `logs/` dir is inferred if it exists (covers SPT's layout).
+    """
+    name = (name or "").strip()
+    if not name:
+        return False
+    if get(name):
+        return False
+    entry: dict = {"name": name}
+    command = (command or "").strip()
+    if command:
+        entry["command"] = command
+        if not logdir:
+            sibling = os.path.join(os.path.dirname(_argv0(command)), "logs")
+            if os.path.isdir(sibling):
+                logdir = sibling
+    logdir = (logdir or "").strip()
+    if logdir:
+        entry["logdir"] = os.path.expanduser(logdir)
+    games = _load()
+    games.append(entry)
+    _save(games)
+    return True
+
+
+def remove(name: str) -> bool:
+    """Remove a game by name (case-insensitive). Returns True if one was removed."""
+    name = (name or "").strip().lower()
+    games = _load()
+    kept = [g for g in games if str(g["name"]).lower() != name]
+    if len(kept) == len(games):
+        return False
+    _save(kept)
+    return True
+
+
+def _argv0(command: str) -> str:
+    parts = shlex.split(command)
+    return parts[0] if parts else command
+
+
+def command(name: str) -> list[str] | None:
+    """The launch argv for a game (shlex-split), or None if it has no command."""
+    entry = get(name)
+    cmd = (entry or {}).get("command")
+    return shlex.split(cmd) if cmd else None
+
+
+def log_dir(name: str) -> str | None:
+    """The game's own log directory, or None if it isn't set / doesn't exist."""
+    entry = get(name)
+    path = (entry or {}).get("logdir")
+    return path if path and os.path.isdir(path) else None
+
+
+def scan() -> list[Game]:
+    """User-added games as `Game` objects (launcher='custom'), sorted by name."""
+    out = [Game(appid="", name=str(g["name"]), library="", installdir="", launcher=LAUNCHER)
+           for g in _load()]
+    return sorted(out, key=lambda g: g.name.lower())

src/rigdoctor/core/diagstore.py

@@ -75,7 +75,7 @@ def store(result, capture_path=None, since: float | None = None) -> Path | None:
     _write(target / "report.txt", "\n".join(report))
 
     try:
-        logs = gamelogs.collect(since=since)
+        logs = gamelogs.collect(since=since, game=getattr(result, "game", None))
         if logs:
             _write(target / "gamelogs.txt", logs)
     except OSError:

src/rigdoctor/core/displays.py

@@ -0,0 +1,148 @@
+"""Connected displays (M5): resolution + current/max refresh per monitor.
+
+GNOME exposes the authoritative data over D-Bus (Mutter `DisplayConfig.GetCurrentState`),
+which works on both X11 and Wayland — read via `busctl --json`. Plain X11 desktops fall back
+to `xrandr`. Other Wayland compositors (sway/KDE) aren't covered yet and degrade to empty.
+Stdlib only; every probe fails soft. Max refresh is computed at the *current* resolution, so
+"can go faster" never suggests dropping resolution.
+"""
+
+from __future__ import annotations
+
+import json
+import re
+import shutil
+import subprocess
+from dataclasses import dataclass
+
+# A few common PNP monitor-vendor IDs → friendly names (best-effort; unknown codes pass through).
+_PNP = {
+    "SAM": "Samsung", "DEL": "Dell", "GSM": "LG", "LGD": "LG", "AUS": "ASUS", "ACR": "Acer",
+    "BNQ": "BenQ", "MSI": "MSI", "AOC": "AOC", "VSC": "ViewSonic", "HWP": "HP", "HPN": "HP",
+    "PHL": "Philips", "GBT": "Gigabyte", "APP": "Apple", "DGC": "Dell",
+}
+
+
+@dataclass
+class Monitor:
+    connector: str          # e.g. "DP-1"
+    name: str               # e.g. "Samsung LC34G55T" ("" if unknown, e.g. xrandr)
+    width: int
+    height: int
+    refresh: float          # current Hz
+    max_refresh: float      # max Hz available at the current resolution
+
+    @property
+    def can_go_faster(self) -> bool:
+        """True if a meaningfully higher refresh is available at the current resolution."""
+        return self.max_refresh - self.refresh > 1.0
+
+    def label(self) -> str:
+        return f"{self.connector} · {self.name}".rstrip(" ·") if self.name else self.connector
+
+
+def _run(cmd: list[str], timeout: float = 8.0) -> 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 _parse_mutter(out: str) -> list[Monitor]:
+    """Parse `busctl --json` output of Mutter DisplayConfig.GetCurrentState.
+
+    data = [serial, monitors, logical_monitors, props]; each monitor is
+    [[connector, vendor, product, serial], [modes], props]; each mode is
+    [id, width, height, refresh, scale, [scales], {props}] where props may hold is-current.
+    """
+    try:
+        data = json.loads(out)["data"]
+        raw_monitors = data[1]
+    except (json.JSONDecodeError, KeyError, IndexError, TypeError):
+        return []
+    monitors: list[Monitor] = []
+    for mon in raw_monitors:
+        try:
+            connector, vendor, product = mon[0][0], mon[0][1], mon[0][2]
+            modes = mon[1]
+        except (IndexError, TypeError):
+            continue
+        current = None
+        for m in modes:
+            props = m[6] if len(m) > 6 and isinstance(m[6], dict) else {}
+            if (props.get("is-current") or {}).get("data"):
+                current = m
+                break
+        if current is None:
+            continue
+        w, h, r = int(current[1]), int(current[2]), float(current[3])
+        max_r = max((float(m[3]) for m in modes if int(m[1]) == w and int(m[2]) == h), default=r)
+        name = f"{_PNP.get(vendor, vendor)} {product}".strip()
+        monitors.append(Monitor(connector, name, w, h, r, max_r))
+    return monitors
+
+
+def _parse_xrandr(out: str) -> list[Monitor]:
+    """Parse `xrandr --query`: an output line with the active WxH+x+y, then indented mode lines
+    whose rates carry `*` for the current one."""
+    monitors: list[Monitor] = []
+    out_re = re.compile(r"^(\S+) connected.*?(\d+)x(\d+)\+\d+\+\d+")
+    mode_re = re.compile(r"^\s+(\d+)x(\d+)\s+(.+)$")
+    name = ""
+    cw = ch = 0
+    cur_r = max_r = 0.0
+
+    def flush() -> None:
+        if name and cw and cur_r:
+            monitors.append(Monitor(name, "", cw, ch, cur_r, max_r or cur_r))
+
+    for line in out.splitlines():
+        mo = out_re.match(line)
+        if mo:
+            flush()
+            name, cw, ch = mo.group(1), int(mo.group(2)), int(mo.group(3))
+            cur_r = max_r = 0.0
+            continue
+        mm = mode_re.match(line)
+        if mm and name and int(mm.group(1)) == cw and int(mm.group(2)) == ch:
+            for tok in mm.group(3).split():
+                try:
+                    rate = float(tok.rstrip("*+"))
+                except ValueError:
+                    continue
+                max_r = max(max_r, rate)
+                if "*" in tok:
+                    cur_r = rate
+    flush()
+    return monitors
+
+
+def _mutter() -> list[Monitor]:
+    exe = shutil.which("busctl")
+    if not exe:
+        return []
+    out = _run([exe, "--user", "--json=short", "call", "org.gnome.Mutter.DisplayConfig",
+                "/org/gnome/Mutter/DisplayConfig", "org.gnome.Mutter.DisplayConfig",
+                "GetCurrentState"])
+    return _parse_mutter(out) if out.strip() else []
+
+
+def _xrandr() -> list[Monitor]:
+    if not shutil.which("xrandr"):
+        return []
+    return _parse_xrandr(_run(["xrandr", "--query"]))
+
+
+def collect() -> list[Monitor]:
+    """Connected monitors, via the first backend that returns any (Mutter, then xrandr)."""
+    for backend in (_mutter, _xrandr):
+        try:
+            monitors = backend()
+        except Exception:
+            monitors = []
+        if monitors:
+            return monitors
+    return []

src/rigdoctor/core/drives.py

@@ -0,0 +1,229 @@
+"""Drive health & wear (M-drives): per-disk SMART stats parsed from smartctl JSON.
+
+Unlike a GPU, storage exposes a real health/wear story, so this reads it in full: the overall
+SMART verdict, a derived **life-left %** (NVMe ``percentage_used`` or the SATA wear-leveling
+attribute), **power-on hours** (the drive's runtime), data written (TBW), temperature, and the
+early-failure predictors (reallocated / pending / offline-uncorrectable sectors, NVMe media
+errors, available spare). Turned into prioritized health findings.
+
+smartctl needs root, so collection runs through the same elevated path as the other root-only
+checks (``rigdoctor collect-priv`` via pkexec at GUI launch, or ``sudo rigdoctor report``).
+Parsing is JSON-based (smartctl ``--json``), which is stable across drive types. Stdlib only;
+degrades gracefully — no smartctl, no root, or an unparseable device yields an info finding.
+"""
+
+from __future__ import annotations
+
+import json
+import shutil
+import subprocess
+from dataclasses import dataclass
+
+from .health import CRITICAL, INFO, OK, WARNING, Finding
+
+# NVMe writes are counted in 512-KB "data units"; 1 unit = 1000 * 512 bytes.
+_NVME_UNIT_BYTES = 512_000
+_LBA_BYTES = 512  # SATA Total_LBAs_Written counts 512-byte sectors
+
+
+@dataclass
+class DriveHealth:
+    device: str
+    model: str = ""
+    kind: str = ""                  # "nvme" | "sata" | "scsi"
+    passed: bool | None = None      # SMART overall verdict; None if unknown / needs root
+    needs_root: bool = False
+    health_pct: int | None = None   # derived life-left %
+    percent_used: int | None = None # NVMe wear used %
+    power_on_hours: int | None = None
+    temp_c: int | None = None
+    data_written_tb: float | None = None
+    reallocated: int | None = None  # SATA reallocated sectors (id 5)
+    pending: int | None = None      # SATA current-pending sectors (id 197)
+    offline_uncorrectable: int | None = None  # SATA id 198
+    available_spare: int | None = None        # NVMe %
+    available_spare_threshold: int | None = None
+    media_errors: int | None = None           # NVMe
+
+
+# --- collection (root) ----------------------------------------------------------------
+
+def _scan_devices() -> list[str]:
+    try:
+        proc = subprocess.run(["smartctl", "--scan"], capture_output=True, text=True, timeout=10)
+    except (subprocess.SubprocessError, OSError):
+        return []
+    return [ln.split()[0] for ln in proc.stdout.splitlines() if ln.strip().startswith("/dev/")]
+
+
+def _smartctl_json(device: str) -> dict | None:
+    try:
+        proc = subprocess.run(
+            ["smartctl", "--json=c", "-H", "-A", "-i", device],
+            capture_output=True, text=True, timeout=20,
+        )
+    except (subprocess.SubprocessError, OSError):
+        return None
+    try:
+        return json.loads(proc.stdout)
+    except (ValueError, TypeError):
+        return None
+
+
+def _ata_attr(data: dict, attr_id: int) -> int | None:
+    for row in data.get("ata_smart_attributes", {}).get("table", []):
+        if row.get("id") == attr_id:
+            raw = row.get("raw", {})
+            return raw.get("value")
+    return None
+
+
+def _ata_norm_value(data: dict, attr_id: int) -> int | None:
+    """The normalized 'value' (100→0 life indicator) for an ATA attribute."""
+    for row in data.get("ata_smart_attributes", {}).get("table", []):
+        if row.get("id") == attr_id:
+            return row.get("value")
+    return None
+
+
+def parse(device: str, data: dict | None) -> DriveHealth:
+    """Build a DriveHealth from smartctl JSON (pure-ish; no IO of its own)."""
+    d = DriveHealth(device=device)
+    if not data:
+        d.needs_root = True
+        return d
+
+    d.model = data.get("model_name") or data.get("scsi_model_name") or ""
+    proto = (data.get("device", {}).get("protocol") or "").lower()
+    d.kind = "nvme" if "nvme" in proto else ("sata" if "ata" in proto else (proto or ""))
+
+    status = data.get("smart_status")
+    if isinstance(status, dict) and "passed" in status:
+        d.passed = bool(status["passed"])
+    else:
+        # No verdict and a non-zero exit usually means we couldn't open the device (needs root).
+        if data.get("smartctl", {}).get("exit_status", 0) and not status:
+            d.needs_root = True
+
+    temp = data.get("temperature", {}).get("current")
+    d.temp_c = int(temp) if isinstance(temp, (int, float)) else None
+    poh = data.get("power_on_time", {}).get("hours")
+    d.power_on_hours = int(poh) if isinstance(poh, (int, float)) else None
+
+    if d.kind == "nvme":
+        log = data.get("nvme_smart_health_information_log", {})
+        d.percent_used = log.get("percentage_used")
+        d.available_spare = log.get("available_spare")
+        d.available_spare_threshold = log.get("available_spare_threshold")
+        d.media_errors = log.get("media_errors")
+        if d.temp_c is None and isinstance(log.get("temperature"), (int, float)):
+            d.temp_c = int(log["temperature"])
+        units = log.get("data_units_written")
+        if isinstance(units, (int, float)):
+            d.data_written_tb = round(units * _NVME_UNIT_BYTES / 1e12, 2)
+        if isinstance(d.percent_used, (int, float)):
+            d.health_pct = max(0, 100 - int(d.percent_used))
+    else:  # SATA / ATA
+        d.reallocated = _ata_attr(data, 5)
+        d.pending = _ata_attr(data, 197)
+        d.offline_uncorrectable = _ata_attr(data, 198)
+        lbas = _ata_attr(data, 241)  # Total_LBAs_Written
+        if isinstance(lbas, (int, float)) and lbas > 0:
+            d.data_written_tb = round(lbas * _LBA_BYTES / 1e12, 2)
+        wear = _ata_norm_value(data, 177)  # Wear_Leveling_Count (Samsung): normalized = life left
+        if wear is None:
+            wear = _ata_norm_value(data, 231)  # SSD_Life_Left on some drives
+        if isinstance(wear, int):
+            d.health_pct = wear
+    return d
+
+
+def collect() -> list[DriveHealth]:
+    """Per-drive health for every SMART-capable device (needs root for real data)."""
+    if shutil.which("smartctl") is None:
+        return []
+    return [parse(dev, _smartctl_json(dev)) for dev in _scan_devices()]
+
+
+def from_dicts(rows: list[dict]) -> list[DriveHealth]:
+    """Rebuild DriveHealth objects from the privileged collector's JSON."""
+    out: list[DriveHealth] = []
+    for r in rows:
+        if isinstance(r, dict) and r.get("device"):
+            fields = {k: r.get(k) for k in DriveHealth.__dataclass_fields__}
+            out.append(DriveHealth(**fields))
+    return out
+
+
+# --- findings -------------------------------------------------------------------------
+
+def _stats_line(d: DriveHealth) -> str:
+    parts: list[str] = []
+    if d.health_pct is not None:
+        parts.append(f"{d.health_pct}% life left")
+    elif d.percent_used is not None:
+        parts.append(f"{d.percent_used}% used")
+    if d.power_on_hours is not None:
+        parts.append(f"{d.power_on_hours:,} h powered on")
+    if d.data_written_tb is not None:
+        parts.append(f"{d.data_written_tb:g} TB written")
+    if d.temp_c is not None:
+        parts.append(f"{d.temp_c}°C")
+    if d.available_spare is not None:
+        parts.append(f"spare {d.available_spare}%")
+    return " · ".join(parts)
+
+
+def to_findings(drives: list[DriveHealth]) -> list[Finding]:
+    if not drives:
+        if shutil.which("smartctl") is None:
+            return [Finding(INFO, "Storage", "SMART not checked (smartmontools missing)",
+                            "Disk self-health couldn't be read.",
+                            "Install it: `sudo apt install smartmontools`")]
+        return []
+    findings: list[Finding] = []
+    for d in drives:
+        name = d.model or d.device
+        if d.needs_root:
+            findings.append(Finding(INFO, "Storage", f"{name}: SMART needs root",
+                                    "Reading drive health requires elevated access.",
+                                    "Run: `sudo rigdoctor report` (or launch the GUI, which asks once)."))
+            continue
+
+        stats = _stats_line(d)
+        # Severity from the failure predictors, worst first.
+        bad = []
+        if d.passed is False:
+            bad.append("SMART overall self-assessment FAILED")
+        for label, val in (("reallocated sectors", d.reallocated),
+                           ("pending sectors", d.pending),
+                           ("offline-uncorrectable sectors", d.offline_uncorrectable),
+                           ("NVMe media errors", d.media_errors)):
+            if isinstance(val, int) and val > 0:
+                bad.append(f"{val} {label}")
+        spare_low = (isinstance(d.available_spare, int) and isinstance(d.available_spare_threshold, int)
+                     and d.available_spare < d.available_spare_threshold)
+        worn = isinstance(d.percent_used, int) and d.percent_used >= 90
+        hot = isinstance(d.temp_c, int) and d.temp_c >= 70
+
+        if d.passed is False or bad:
+            findings.append(Finding(
+                CRITICAL, "Storage", f"{name}: failing ({stats})" if stats else f"{name}: failing",
+                "; ".join(bad) + ".",
+                "Back up this drive now and plan to replace it."))
+        elif spare_low or worn:
+            findings.append(Finding(
+                WARNING, "Storage", f"{name}: worn ({stats})",
+                ("Available spare below the drive's threshold." if spare_low else
+                 f"NVMe wear at {d.percent_used}% used — near end of rated life."),
+                "Back up important data and budget for a replacement."))
+        elif hot:
+            findings.append(Finding(
+                WARNING, "Storage", f"{name}: hot ({stats})",
+                f"Drive temperature is {d.temp_c}°C.",
+                "Improve case/M.2 airflow; sustained heat shortens SSD life."))
+        else:
+            findings.append(Finding(
+                OK, "Storage", f"{name}: healthy" + (f" ({stats})" if stats else ""),
+                "SMART self-assessment passed." if d.passed else ""))
+    return findings

src/rigdoctor/core/gamelogs.py

@@ -81,15 +81,48 @@ def available() -> bool:
     return bool(_proton_logs() or _steam_console())
 
 
-def collect(since: float | None = None, max_bytes: int = 8000) -> str:
+def _custom_game_logs(game: str, since: float | None, max_bytes: int) -> list[str]:
-    """Recent Proton + Steam log tails as one labelled text block ('' if none).
+    """Tail the recent ``*.log`` files in a custom game's own log dir (e.g. SPT's
+    ``logs/tarkov-latest.log`` + ``server-latest.log``), newest first, freshness-scoped by mtime.
+
+    Custom-game logs use their own timestamp formats, so we scope by file mtime (like the Proton
+    log) rather than the ``[YYYY-MM-DD …]`` line filter used for the Steam console.
+    """
+    from . import customgames
+
+    directory = customgames.log_dir(game)
+    if not directory:
+        return []
+    try:
+        files = [p for p in Path(directory).glob("*.log") if p.is_file()]
+    except OSError:
+        return []
+    files.sort(key=_mtime, reverse=True)
+    sections: list[str] = []
+    for log in files[:4]:  # a session touches a handful (tarkov/server/launcher latest)
+        if since is not None and _mtime(log) < since:
+            continue
+        tail = _tail(log, max_bytes).strip()
+        if tail:
+            sections.append(f"--- {game} log ({log.name}) ---\n{tail}")
+    return sections
+
+
+def collect(since: float | None = None, max_bytes: int = 8000, game: str | None = None) -> str:
+    """Recent Proton + Steam (+ custom-game) log tails as one labelled text block ('' if none).
 
     With ``since`` (epoch), scope to that session: skip a Proton log not written during/after
     the session (a stale per-app log from an earlier game), and keep only Steam-console lines
     timestamped at/after ``since`` — so we don't feed the model an unrelated past session.
+
+    ``game`` (the diagnostic's focused title) pulls in that custom game's own logs if it has a
+    registered log dir — e.g. SPT's server/launcher logs, which Steam/Proton never see.
     """
     sections: list[str] = []
 
+    if game:
+        sections += _custom_game_logs(game, since, max_bytes)
+
     protons = _proton_logs()
     if protons:
         log = protons[0]

src/rigdoctor/core/health.py

@@ -116,6 +116,31 @@ def scan_journal_text(text: str) -> list[Finding]:
             "Check power/thermals/driver; capture a session with `rigdoctor record`.",
         ))
 
+    # NVIDIA open-kernel-module VA-space mapping faults: a driver-internal failure that can
+    # storm for minutes and end in a HARD FREEZE with NO Xid logged — the GPU never "falls off
+    # the bus", so the Xid scan above misses it entirely. These code paths live in the open
+    # kernel module (nvidia-*-open); the proprietary module doesn't hit them.
+    nvrm_va = [
+        ln for ln in lines
+        if "gpu_vaspace.c" in ln
+        or "_gvaspaceMappingInsert" in ln
+        or "dmaAllocMapping" in ln
+        or "NVKMS memory for GEM object" in ln
+    ]
+    if nvrm_va:
+        findings.append(Finding(
+            WARNING, "GPU", f"NVIDIA driver VA-space mapping errors ×{len(nvrm_va)}",
+            "The NVIDIA kernel module repeatedly failed to update the GPU's virtual address "
+            "space (gpu_vaspace / dmaAllocMapping assertions, NVKMS GEM-allocation failures). "
+            "This is a driver-internal fault that can recur for minutes and end in a hard freeze "
+            "with NO Xid logged — distinct from an Xid 79 hardware drop. These code paths are "
+            "specific to the open kernel module (nvidia-*-open).",
+            "If you're on the open module, switch to the proprietary NVIDIA driver "
+            "(install `nvidia-driver-###` instead of the `…-open` variant) and update to the "
+            "latest branch, then reboot. Capture a session with `rigdoctor record` to confirm "
+            "the errors precede the freeze.",
+        ))
+
     return findings
 
 
@@ -188,47 +213,66 @@ def check_nvidia_driver() -> list[Finding]:
     return []
 
 
-def _smart_devices() -> list[str]:
+def _read_text(path: str) -> str | None:
     try:
-        proc = subprocess.run(["smartctl", "--scan"], capture_output=True, text=True, timeout=10)
+        return Path(path).read_text()
+    except OSError:
+        return None
+
+
+def _nvidia_module_is_open() -> bool | None:
+    """Whether the *loaded* NVIDIA kernel module is the open-source flavor.
+
+    True = open (nvidia-*-open), False = proprietary, None = can't tell / no NVIDIA module.
+    /proc is authoritative for the loaded module and needs no external tool; modinfo's filename
+    (…/nvidia-###-open/nvidia.ko) is the fallback.
+    """
+    proc = _read_text("/proc/driver/nvidia/version")
+    if proc:
+        low = proc.lower()
+        if "open kernel module" in low:
+            return True
+        if "kernel module" in low:  # proprietary banner: "NVIDIA UNIX … Kernel Module …"
+            return False
+    if shutil.which("modinfo"):
+        try:
+            out = subprocess.run(["modinfo", "nvidia"], capture_output=True, text=True, timeout=10).stdout
         except (subprocess.SubprocessError, OSError):
+            out = ""
+        for line in out.splitlines():
+            if line.startswith("filename:"):
+                return "-open" in line
+    return None
+
+
+def check_nvidia_module() -> list[Finding]:
+    """Note when the open-source NVIDIA kernel module is loaded — the context behind the no-Xid
+    VA-space freeze signature, which lives in the open module's code paths (suggestion-only)."""
+    if _nvidia_module_is_open() is not True:
         return []
-    devices = []
+    return [Finding(
-    for line in proc.stdout.splitlines():
+        INFO, "Driver", "NVIDIA open kernel module in use",
-        line = line.strip()
+        "The loaded NVIDIA driver is the open-source kernel module (nvidia-*-open). It's fine for "
-        if line.startswith("/dev/"):
+        "most setups, but on some GeForce cards it hits driver-internal faults (VA-space mapping "
-            devices.append(line.split()[0])
+        "errors, hard freezes with no Xid) that the proprietary module doesn't.",
-    return devices
+        "If you get unexplained hard freezes with no Xid in the logs, try the proprietary NVIDIA "
+        "driver (`nvidia-driver-###` rather than the `…-open` variant) on the latest branch.",
+    )]
 
 
-def check_smart() -> list[Finding]:
+def check_drives() -> list[Finding]:
-    if shutil.which("smartctl") is None:
+    """Per-drive SMART health + wear/runtime stats (see core/drives.py).
-        return [Finding(
+
-            INFO, "Storage", "SMART not checked (smartmontools missing)",
+    Uses the session's elevated collection when present (GUI launch / pkexec), else reads
-            "Disk self-health couldn't be read.",
+    smartctl directly — which only returns real data as root, so the unprivileged case yields
-            "Install it for disk health checks: `sudo apt install smartmontools`",
+    'needs root' info findings pointing at `sudo rigdoctor report`.
-        )]
+    """
-    devices = _smart_devices()
+    from . import drives, elevation
-    if not devices:
+
-        return [Finding(
+    priv = elevation.privileged()
-            INFO, "Storage", "SMART: couldn't enumerate drives",
+    if priv is not None and priv.get("drives") is not None:
-            "Reading SMART usually needs root.",
+        return drives.to_findings(drives.from_dicts(priv["drives"]))
-            "Run: `sudo rigdoctor report`",
+    return drives.to_findings(drives.collect())
-        )]
-    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]:
@@ -251,27 +295,97 @@ def check_live_temps() -> list[Finding]:
     )]
 
 
+def check_pcie_links() -> list[Finding]:
+    """Flag NVMe drives linked below their PCIe capability — a slower slot or, most often,
+    motherboard lane-sharing where a GPU/second card or another M.2 steals lanes from the slot.
+
+    Width reductions are reliable (reported as warnings); speed-only reductions are info (they can
+    also be normal link power management at idle). The GPU is intentionally not checked here:
+    NVIDIA drops its PCIe gen *and* width at idle, so a point-in-time snapshot is misleading.
+    """
+    from . import inventory
+
+    findings: list[Finding] = []
+    for name, dev in inventory.nvme_controllers():
+        cur_g, cur_w, max_g, max_w = inventory.read_link(dev)
+        if not cur_g or not max_g:
+            continue
+        if max_w and cur_w and cur_w != max_w:  # fewer lanes → almost always lane-sharing
+            findings.append(Finding(
+                WARNING, "PCIe", f"{name} linked at x{cur_w} (supports x{max_w})",
+                f"{name} negotiated PCIe Gen{cur_g} x{cur_w}, but the drive supports "
+                f"Gen{max_g} x{max_w}. Fewer lanes is usually motherboard lane-sharing — a GPU or a "
+                "second card in a PCIe slot, or another populated M.2, can steal lanes from this slot.",
+                "Check your board manual's lane-sharing table; move the drive to a full-x4 "
+                "(often CPU-attached) M.2 slot."))
+        elif cur_g < max_g:  # full width but a lower generation → slower slot or idle ASPM
+            findings.append(Finding(
+                INFO, "PCIe", f"{name} linked at Gen{cur_g} (supports Gen{max_g})",
+                f"{name} negotiated PCIe Gen{cur_g} but supports Gen{max_g}. This can be a slower "
+                "(chipset or older) M.2 slot, or normal link power management (ASPM) at idle.",
+                "If you expect full speed, check the slot and the BIOS PCIe/ASPM settings."))
+    return findings
+
+
+def check_displays() -> list[Finding]:
+    """Flag monitors running below their max refresh rate at the current resolution — e.g. a
+    165 Hz panel set to 60 Hz, a common and easily-missed gaming setting (read-only suggestion)."""
+    from . import displays
+
+    findings: list[Finding] = []
+    for m in displays.collect():
+        if m.can_go_faster:
+            findings.append(Finding(
+                INFO, "Display",
+                f"{m.connector} at {round(m.refresh)} Hz (supports {round(m.max_refresh)} Hz)",
+                f"{m.name or m.connector} is running at {round(m.refresh)} Hz at "
+                f"{m.width}x{m.height}, but supports {round(m.max_refresh)} Hz at that resolution.",
+                "Raise the refresh rate in your desktop's Display settings (GNOME: Settings → Displays)."))
+    return findings
+
+
+def check_memory_speed() -> list[Finding]:
+    """Flag RAM running below its rated speed — i.e. the XMP (Intel) / EXPO (AMD) profile isn't
+    enabled, leaving memory bandwidth on the table. Needs dmidecode (root); silent without it."""
+    from . import elevation, inventory
+
+    priv = elevation.privileged()
+    dmi = priv["dmidecode"] if (priv and priv.get("dmidecode")) else inventory._dmidecode()
+    worst: tuple[int, int] | None = None  # (configured, rated) with the biggest gap
+    for m in dmi.get("memory", []):
+        configured, rated = inventory.module_speed(m)
+        if configured and rated and configured < rated:
+            if worst is None or (rated - configured) > (worst[1] - worst[0]):
+                worst = (configured, rated)
+    if worst is None:
+        return []
+    configured, rated = worst
+    return [Finding(
+        INFO, "Memory", f"RAM at {configured} MT/s (rated {rated} MT/s)",
+        f"Memory is running at {configured} MT/s but the modules are rated {rated} MT/s — the "
+        "XMP/EXPO profile isn't enabled, so you're leaving memory bandwidth on the table.",
+        "Enable XMP (Intel) or EXPO (AMD) in your BIOS/UEFI to run at the rated speed.")]
+
+
 def run_health_checks(include_journal: bool = True) -> 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
+    Drive SMART and RAM speed need root; if the session collected them via launch elevation,
-    instead of re-running smartctl (which would just report "needs root").
+    those checks use the cached data instead of re-running (which would just report "needs root").
 
     `include_journal=False` skips the 7-day kernel-journal scan — used by the crash
     analysis, which scans the previous (crashed) boot specifically instead.
     """
-    from . import elevation
-
     findings: list[Finding] = []
     findings += check_nvidia_driver()
+    findings += check_nvidia_module()
     if include_journal:
         findings += check_journal()
     findings += check_journal_persistence()
-    priv = elevation.privileged()
+    findings += check_drives()
-    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 += check_pcie_links()
+    findings += check_displays()
+    findings += check_memory_speed()  # uses elevation data if present, else dmidecode (root)
     findings.sort(key=lambda f: _ORDER.get(f.severity, 9))
     return findings

src/rigdoctor/core/inventory.py

@@ -9,6 +9,7 @@ from __future__ import annotations
 import json
 import os
 import platform
+import re
 import shutil
 import subprocess
 from dataclasses import dataclass
@@ -85,6 +86,35 @@ def _firmware(dmi: dict) -> Section:
     return Section("Firmware", items)
 
 
+# Common DDR5 XMP/EXPO speed grades (MT/s) — used to read a kit's rated speed from its part
+# number, since with XMP/EXPO off dmidecode only reports the JEDEC base (e.g. 4800).
+_DDR_SPEEDS = {4800, 5200, 5600, 6000, 6200, 6400, 6600, 6800, 7000, 7200, 7600, 8000, 8200, 8400}
+
+
+def _mts(value: str) -> int | None:
+    """Parse a dmidecode speed like '4800 MT/s' (or 'MHz') to its integer MT/s."""
+    m = re.match(r"\s*(\d+)", value or "")
+    return int(m.group(1)) if m else None
+
+
+def _rated_from_part(part: str) -> int | None:
+    """The highest known DDR speed-grade appearing as a 4-digit token in a part number."""
+    grades = [int(n) for n in re.findall(r"(?<!\d)(\d{4})(?!\d)", part or "") if int(n) in _DDR_SPEEDS]
+    return max(grades) if grades else None
+
+
+def module_speed(m: dict) -> tuple[int | None, int | None]:
+    """(configured, rated) MT/s for a dmidecode Memory Device.
+
+    Configured = what it's actually running at; rated = the highest of dmidecode's reported max
+    and the part-number speed-grade (so an unapplied XMP/EXPO profile is still detected).
+    """
+    configured = _mts(m.get("Configured Memory Speed") or m.get("Configured Clock Speed") or m.get("Speed", ""))
+    candidates = [s for s in (_mts(m.get("Speed", "")), _rated_from_part(m.get("Part Number", ""))) if s]
+    rated = max(candidates) if candidates else None
+    return configured, rated
+
+
 def _memory(dmi: dict) -> Section:
     items: list[tuple[str, str]] = []
     try:
@@ -98,8 +128,12 @@ def _memory(dmi: dict) -> Section:
     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)
+            configured, rated = module_speed(m)
-            items.append((f"Slot {i}", desc))
+            speed = f"{configured} MT/s" if configured else m.get("Speed", "")
+            if rated and configured and rated > configured:  # XMP/EXPO not applied
+                speed += f" (rated {rated})"
+            parts = (m.get("Size"), m.get("Type"), speed, m.get("Part Number"))
+            items.append((f"Slot {i}", " · ".join(p for p in parts if p)))
     elif shutil.which("dmidecode"):
         items.append(("Modules", "run with admin for module details"))
     return Section("Memory", items)
@@ -123,6 +157,64 @@ def _gpu() -> Section:
     return Section("GPU", [("Device", g) for g in gpus] or [("Device", "unknown")])
 
 
+# PCIe link speed (GT/s) → generation.
+_PCIE_GEN = {"2.5": 1, "5": 2, "5.0": 2, "8": 3, "8.0": 3, "16": 4, "16.0": 4, "32": 5, "32.0": 5}
+
+
+def _gen(speed: str) -> int | None:
+    """Map a sysfs link speed like '16.0 GT/s PCIe' to its PCIe generation (4)."""
+    tok = speed.strip().split()[0] if speed.strip() else ""
+    return _PCIE_GEN.get(tok)
+
+
+def read_link(dev: Path) -> tuple[int | None, str, int | None, str]:
+    """Negotiated/max PCIe link for a PCI device dir: (cur_gen, cur_width, max_gen, max_width).
+
+    Widths are the raw sysfs strings (e.g. '4'); gens are ints (4) or None when unreadable.
+    """
+    def rd(name: str) -> str:
+        try:
+            return (dev / name).read_text().strip()
+        except OSError:
+            return ""
+
+    return (_gen(rd("current_link_speed")), rd("current_link_width"),
+            _gen(rd("max_link_speed")), rd("max_link_width"))
+
+
+def _link_desc(dev: Path) -> str:
+    """Describe a PCI device's negotiated PCIe link, noting if it's below its max.
+
+    e.g. 'PCIe Gen4 x4', or 'PCIe Gen3 x4 (capable of Gen4 x4)' when downtrained / in a
+    slower slot.
+    """
+    cur_g, cur_w, max_g, max_w = read_link(dev)
+    if not cur_g or not cur_w:
+        return ""
+    desc = f"PCIe Gen{cur_g} x{cur_w}"
+    if max_g and (cur_g < max_g or (max_w and cur_w != max_w)):
+        desc += f" (capable of Gen{max_g} x{max_w})"
+    return desc
+
+
+def nvme_controllers() -> list[tuple[str, Path]]:
+    """Each NVMe controller as (name, pci-device-dir), e.g. ('nvme0', /sys/.../device)."""
+    base = Path("/sys/class/nvme")
+    try:
+        entries = [p for p in base.iterdir() if re.fullmatch(r"nvme\d+", p.name)]
+    except OSError:
+        return []
+    return sorted((p.name, p / "device") for p in entries)
+
+
+def _nvme_link(block_name: str) -> str:
+    """PCIe link for an NVMe block device (nvme0n1 → controller nvme0); '' for non-NVMe."""
+    m = re.match(r"(nvme\d+)", block_name)
+    if not m:
+        return ""
+    return _link_desc(Path("/sys/class/nvme") / m.group(1) / "device")
+
+
 def _storage() -> Section:
     items: list[tuple[str, str]] = []
     # TYPE first so MODEL (which can contain spaces) is the trailing field.
@@ -133,15 +225,27 @@ def _storage() -> Section:
             continue
         name, size = parts[1], parts[2]
         model = parts[3] if len(parts) > 3 else ""
-        items.append((name, f"{model} ({size})".strip()))
+        desc = f"{model} ({size})".strip()
+        link = _nvme_link(name)  # NVMe PCIe gen/width (e.g. Gen4 x4), flags downtrains
+        if link:
+            desc += f" · {link}"
+        items.append((name, desc))
     return Section("Storage", items or [("Disks", "unknown")])
 
 
 def _display() -> Section:
-    return Section("Display", [
+    from . import displays
+
+    items = [
         ("Session", os.environ.get("XDG_SESSION_TYPE", "unknown")),
         ("Desktop", os.environ.get("XDG_CURRENT_DESKTOP") or os.environ.get("DESKTOP_SESSION", "unknown")),
-    ])
+    ]
+    for m in displays.collect():
+        val = f"{m.width}x{m.height} @ {round(m.refresh)} Hz"
+        if m.can_go_faster:
+            val += f" (supports {round(m.max_refresh)} Hz)"
+        items.append((m.label(), val))
+    return Section("Display", items)
 
 
 def _dmidecode() -> dict:

src/rigdoctor/core/minidump.py

@@ -0,0 +1,314 @@
+"""Parse a Windows crash dump (``.dmp`` minidump) into text the AI can reason over (M14).
+
+Linux gamers get these from Windows games running under **Proton/Wine**: the game's
+crash handler (Crashpad/Breakpad, Unreal/Unity, or Wine itself) writes a binary minidump
+when the title hard-crashes. The file is binary, so we can't hand it to a model directly —
+we parse the documented ``MDMP`` streams with stdlib :mod:`struct` (no pip deps, per the
+core rule) and pull out the parts that actually diagnose a crash:
+
+  * the **exception / crash reason** (e.g. access violation 0xC0000005),
+  * the **faulting module** (which DLL the crash address lands in — ``nvwgf2umx.dll``,
+    ``d3d11.dll``, an anticheat, the game's own .exe…),
+  * **OS / CPU** info, and the **loaded module list**.
+
+If ``minidump_stackwalk`` (Breakpad) or ``minidump-stackwalk`` (rust-minidump) is on PATH,
+its fuller report is appended best-effort; we never depend on it.
+
+The result feeds the existing opt-in AI flow (:mod:`ai`) exactly like the sensor findings do.
+"""
+
+from __future__ import annotations
+
+import shutil
+import struct
+import subprocess
+import time
+from dataclasses import dataclass, field
+from pathlib import Path
+
+from .health import CRITICAL, INFO, Finding
+
+# --- MDMP on-disk layout (all little-endian, packed) --------------------------------
+_SIGNATURE = b"MDMP"
+_HEADER = struct.Struct("<4sIIIIIQ")          # sig, ver, n_streams, dir_rva, csum, time, flags
+_DIRECTORY = struct.Struct("<III")            # stream_type, data_size, data_rva
+_SYSINFO = struct.Struct("<HHHBBIIIII")       # arch, lvl, rev, n_cpu, prod, maj, min, build, plat, csd
+_MODULE_STRIDE = 108                           # sizeof(MINIDUMP_MODULE)
+
+# Stream types we read (MINIDUMP_STREAM_TYPE).
+_MODULE_LIST = 4
+_EXCEPTION = 6
+_SYSTEM_INFO = 7
+_COMMENT_A = 10
+_COMMENT_W = 11
+
+_ARCH = {0: "x86", 5: "ARM", 6: "IA-64", 9: "x86-64", 12: "ARM64", 0xFFFF: "unknown"}
+_PLATFORM = {0x8201: "Linux", 0x8202: "Solaris", 0x8203: "macOS", 0x8204: "iOS",
+             0x8205: "Android", 0x8207: "NaCl"}
+
+# Common Windows exception (NTSTATUS) codes — what the model needs named, not raw hex.
+_EXCEPTION_NAMES = {
+    0x80000003: "Breakpoint",
+    0x80000004: "Single step",
+    0xC0000005: "Access violation",
+    0xC0000006: "In-page error",
+    0xC000001D: "Illegal instruction",
+    0xC0000025: "Noncontinuable exception",
+    0xC000008C: "Array bounds exceeded",
+    0xC000008E: "Float divide by zero",
+    0xC0000090: "Float invalid operation",
+    0xC0000094: "Integer divide by zero",
+    0xC0000095: "Integer overflow",
+    0xC0000096: "Privileged instruction",
+    0xC00000FD: "Stack overflow",
+    0xC0000135: "DLL not found",
+    0xC0000142: "DLL initialization failed",
+    0xC0000374: "Heap corruption",
+    0xC0000409: "Stack buffer overrun / fast fail",
+    0xC000041D: "Fatal user-callback exception",
+    0xE06D7363: "C++ exception (MSVC)",
+}
+_ACCESS = {0: "reading", 1: "writing", 8: "executing"}  # AV ExceptionInformation[0]
+
+_STACKWALK_BINS = ("minidump_stackwalk", "minidump-stackwalk")
+_MODULES_SHOWN = 80  # cap the module list so the AI prompt stays bounded
+
+
+@dataclass
+class Module:
+    name: str   # basename only
+    base: int
+    size: int
+
+
+@dataclass
+class MinidumpReport:
+    path: str
+    ok: bool = False
+    error: str = ""
+    crash_reason: str = ""
+    exception_code: int | None = None
+    exception_address: int | None = None
+    faulting_module: str | None = None
+    crashing_thread: int | None = None
+    os_name: str = ""
+    cpu_arch: str = ""
+    cpu_count: int = 0
+    timestamp: int | None = None
+    modules: list[Module] = field(default_factory=list)
+    comment: str = ""
+    stackwalk: str = ""
+
+
+def parse(path, *, run_stackwalk: bool = True) -> MinidumpReport:
+    """Parse a ``.dmp`` file. Never raises — a bad/unsupported file returns ``ok=False``."""
+    report = MinidumpReport(path=str(path))
+    try:
+        data = Path(path).read_bytes()
+    except OSError as exc:
+        report.error = f"can't read the file: {exc}"
+        return report
+    if len(data) < _HEADER.size or data[:4] != _SIGNATURE:
+        report.error = "not a Windows minidump (missing the 'MDMP' signature)."
+        return report
+    try:
+        _sig, _ver, n_streams, dir_rva, _csum, ts, _flags = _HEADER.unpack_from(data, 0)
+        report.timestamp = ts or None
+        streams = _streams(data, dir_rva, n_streams)
+        _read_system_info(data, streams.get(_SYSTEM_INFO), report)
+        report.modules = _read_modules(data, streams.get(_MODULE_LIST))
+        _read_exception(data, streams.get(_EXCEPTION), report)
+        report.comment = _read_comment(data, streams)
+    except (struct.error, ValueError, IndexError) as exc:
+        report.error = f"the minidump looks corrupt or unsupported: {exc}"
+        return report
+    if report.exception_address is not None:
+        report.faulting_module = _module_at(report.modules, report.exception_address)
+    report.ok = True
+    if run_stackwalk:
+        report.stackwalk = stackwalk(path)
+    return report
+
+
+def _streams(data: bytes, dir_rva: int, n: int) -> dict[int, tuple[int, int]]:
+    """Map stream_type -> (data_size, data_rva). First occurrence of each type wins."""
+    out: dict[int, tuple[int, int]] = {}
+    for i in range(n):
+        off = dir_rva + i * _DIRECTORY.size
+        if off + _DIRECTORY.size > len(data):
+            break
+        stype, size, rva = _DIRECTORY.unpack_from(data, off)
+        out.setdefault(stype, (size, rva))
+    return out
+
+
+def _read_system_info(data: bytes, loc, report: MinidumpReport) -> None:
+    if not loc:
+        return
+    _size, rva = loc
+    arch, _lvl, _rev, n_cpu, _prod, major, minor, build, platform, _csd = \
+        _SYSINFO.unpack_from(data, rva)
+    report.cpu_arch = _ARCH.get(arch, f"arch 0x{arch:x}")
+    report.cpu_count = n_cpu
+    if platform == 2:  # VER_PLATFORM_WIN32_NT
+        report.os_name = f"Windows {major}.{minor}.{build}"
+    elif platform in _PLATFORM:
+        ver = f" {major}.{minor}.{build}" if (major or minor or build) else ""
+        report.os_name = _PLATFORM[platform] + ver
+    else:
+        report.os_name = f"platform 0x{platform:x} {major}.{minor}.{build}"
+
+
+def _read_modules(data: bytes, loc) -> list[Module]:
+    if not loc:
+        return []
+    _size, rva = loc
+    (count,) = struct.unpack_from("<I", data, rva)
+    base_off = rva + 4
+    modules: list[Module] = []
+    for i in range(count):
+        rec = base_off + i * _MODULE_STRIDE
+        if rec + _MODULE_STRIDE > len(data):
+            break
+        base, = struct.unpack_from("<Q", data, rec)
+        size, = struct.unpack_from("<I", data, rec + 8)
+        name_rva, = struct.unpack_from("<I", data, rec + 20)
+        modules.append(Module(_read_mdstring(data, name_rva), base, size))
+    return modules
+
+
+def _read_exception(data: bytes, loc, report: MinidumpReport) -> None:
+    if not loc:
+        return
+    _size, rva = loc
+    thread_id, = struct.unpack_from("<I", data, rva)            # MINIDUMP_EXCEPTION_STREAM
+    code, = struct.unpack_from("<I", data, rva + 8)             # ExceptionRecord.ExceptionCode
+    address, = struct.unpack_from("<Q", data, rva + 24)         # ExceptionRecord.ExceptionAddress
+    n_params, = struct.unpack_from("<I", data, rva + 32)
+    report.crashing_thread = thread_id
+    report.exception_code = code
+    report.exception_address = address
+    report.crash_reason = _describe_exception(data, rva, code, n_params)
+
+
+def _describe_exception(data: bytes, rva: int, code: int, n_params: int) -> str:
+    name = _EXCEPTION_NAMES.get(code, "Unknown exception")
+    reason = f"{name} (0x{code:08X})"
+    if code in (0xC0000005, 0xC0000006) and n_params >= 2:
+        op = struct.unpack_from("<Q", data, rva + 40)[0]       # ExceptionInformation[0]
+        addr = struct.unpack_from("<Q", data, rva + 48)[0]     # ExceptionInformation[1]
+        reason += f" {_ACCESS.get(op, 'accessing')} 0x{addr:X}"
+    return reason
+
+
+def _read_mdstring(data: bytes, rva: int) -> str:
+    """A MINIDUMP_STRING (u32 byte-length + UTF-16LE), returned as a basename."""
+    if not rva or rva + 4 > len(data):
+        return ""
+    length, = struct.unpack_from("<I", data, rva)
+    start = rva + 4
+    raw = data[start:start + length]
+    text = raw.decode("utf-16-le", "replace").strip("\x00")
+    return text.replace("\\", "/").rsplit("/", 1)[-1] or text
+
+
+def _read_comment(data: bytes, streams: dict[int, tuple[int, int]]) -> str:
+    if _COMMENT_W in streams:
+        size, rva = streams[_COMMENT_W]
+        return data[rva:rva + size].decode("utf-16-le", "replace").strip("\x00").strip()
+    if _COMMENT_A in streams:
+        size, rva = streams[_COMMENT_A]
+        return data[rva:rva + size].decode("utf-8", "replace").strip("\x00").strip()
+    return ""
+
+
+def _module_at(modules: list[Module], address: int) -> str | None:
+    for m in modules:
+        if m.base <= address < m.base + m.size:
+            return m.name
+    return None
+
+
+def stackwalk(path, timeout: float = 25.0, max_chars: int = 12000) -> str:
+    """Best-effort fuller report from an external stackwalker, or '' if none is installed."""
+    exe = next((shutil.which(name) for name in _STACKWALK_BINS if shutil.which(name)), None)
+    if not exe:
+        return ""
+    try:
+        proc = subprocess.run(
+            [exe, str(path)], capture_output=True, text=True, timeout=timeout, check=False)
+    except (OSError, subprocess.SubprocessError):
+        return ""
+    return (proc.stdout or "").strip()[:max_chars]
+
+
+# --- rendering ----------------------------------------------------------------------
+
+def to_text(report: MinidumpReport) -> str:
+    """Human-readable structured summary (also shown in the GUI)."""
+    name = Path(report.path).name
+    lines = [f"Crash dump: {name}"]
+    if report.crash_reason:
+        lines.append(f"Crash reason: {report.crash_reason}")
+    if report.faulting_module:
+        lines.append(f"Faulting module: {report.faulting_module}")
+    elif report.exception_address is not None:
+        lines.append(f"Faulting address: 0x{report.exception_address:X} (no module matched)")
+    if report.crashing_thread is not None:
+        lines.append(f"Crashing thread: {report.crashing_thread}")
+    if report.os_name:
+        lines.append(f"OS: {report.os_name}")
+    if report.cpu_arch:
+        cpus = f" ({report.cpu_count} logical)" if report.cpu_count else ""
+        lines.append(f"CPU: {report.cpu_arch}{cpus}")
+    if report.timestamp:
+        lines.append("Captured: " + time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(report.timestamp)))
+    if report.modules:
+        shown = report.modules[:_MODULES_SHOWN]
+        more = len(report.modules) - len(shown)
+        lines.append(f"\nLoaded modules ({len(report.modules)}):")
+        lines += [f"- {m.name}" for m in shown if m.name]
+        if more > 0:
+            lines.append(f"- (+{more} more)")
+    if report.comment:
+        lines.append(f"\nDump comment:\n{report.comment[:1000]}")
+    return "\n".join(lines)
+
+
+def to_ai_text(report: MinidumpReport) -> str:
+    """The block sent to the model: Proton/Linux framing + summary + stackwalk."""
+    framing = (
+        "These findings come from a Windows crash minidump (.dmp) produced by a game running "
+        "under Proton/Wine on Linux. The faulting modules are Windows DLLs inside the Proton "
+        "prefix, so the crash is a Windows-process fault but the fixes are Linux/Proton-side "
+        "(Proton version, DXVK/VKD3D, GPU driver, launch options, shader cache) — never Windows "
+        "admin/registry steps."
+    )
+    parts = [framing, "", to_text(report)]
+    if report.stackwalk:
+        parts.append("\nminidump_stackwalk output:\n" + report.stackwalk)
+    return "\n".join(parts)
+
+
+def to_findings(report: MinidumpReport) -> list[Finding]:
+    """Render the dump as Finding cards for the GUI (mirrors the health report)."""
+    findings: list[Finding] = []
+    detail_bits = []
+    if report.faulting_module:
+        detail_bits.append(f"in {report.faulting_module}")
+    if report.exception_address is not None:
+        detail_bits.append(f"at 0x{report.exception_address:X}")
+    detail = (report.crash_reason or "Crash recorded")
+    if detail_bits:
+        detail += " " + " ".join(detail_bits) + "."
+    findings.append(Finding(
+        CRITICAL, "Crash dump",
+        f"Crash in {report.faulting_module}" if report.faulting_module else "Crash recorded",
+        detail,
+        "Use “Explain with AI” for likely causes and Proton-side fixes.",
+    ))
+    env_bits = [b for b in (report.os_name, report.cpu_arch and f"{report.cpu_arch} CPU") if b]
+    if env_bits:
+        findings.append(Finding(
+            INFO, "Crash dump", "Dump environment", " · ".join(env_bits)))
+    return findings

src/rigdoctor/core/stress.py

@@ -0,0 +1,322 @@
+"""GPU stress + close thermal monitoring — the repro tool for load-correlated crashes.
+
+Run a GPU load and sample sensors at a high rate, then report peak/sustained temperatures,
+how long the GPU spent above each temperature threshold, power headroom vs the limit, whether
+it throttled, and any GPU fault (Xid / VA-space / a query timeout) that hit during the window.
+This is the on-demand way to reproduce the "only under load / only certain games" freezes
+instead of waiting for a game to trigger them.
+
+The load comes from, in order: an explicit ``command`` (your game, or a loader like gpu-burn),
+an auto-detected loader on PATH (gpu-burn / vkmark / glmark2 / vkcube), or **monitor-only** when
+none is found — then you generate the load yourself (launch the game) while this closely tracks
+temps for the duration.
+
+Stdlib only. Degrades gracefully: no nvidia-smi → no GPU stats; a loader that won't start →
+monitor-only with a note; missing journal access → no fault scan, just the telemetry.
+"""
+
+from __future__ import annotations
+
+import shutil
+import subprocess
+import time
+from collections.abc import Callable
+from dataclasses import dataclass, field
+
+from . import health
+from .sample import Sample
+from .sampler import Sampler
+from .sources import available_sources
+
+# Default temperature dwell thresholds (°C). 83 is Ampere's typical thermal-throttle point;
+# 90+ is hot; sustained 95+ on the core (or 100+ on GDDR6 memory) is a cooling problem.
+DEFAULT_THRESHOLDS = (80, 85, 90, 95)
+
+# Known GPU load generators, best (heaviest / most deterministic) first. argv builder takes the
+# remaining duration so a self-terminating loader (gpu-burn) bounds itself; the windowed
+# benchmarks loop until we kill them. None are required — detection is best-effort.
+_LOADERS: list[tuple[str, Callable[[float], list[str]]]] = [
+    ("gpu-burn", lambda secs: ["gpu-burn", str(max(1, int(secs)))]),
+    ("vkmark", lambda _s: ["vkmark", "--run-forever"]),
+    ("glmark2", lambda _s: ["glmark2", "--run-forever"]),
+    ("vkcube", lambda _s: ["vkcube"]),
+]
+
+# NVML clocks-event bits that mean the clocks are being *held back* (a throttle), decoded from
+# the active-reasons bitmask so we don't depend on per-field name differences across drivers.
+_THROTTLE_BITS = {
+    0x008: "HW slowdown",
+    0x020: "SW thermal slowdown",
+    0x040: "HW thermal slowdown",
+    0x080: "HW power-brake slowdown",
+}
+_POWERCAP_BIT = 0x004  # hitting the power limit — expected under load, reported separately
+
+
+@dataclass
+class MetricStat:
+    key: str          # e.g. "gpu.temp", "gpu.power", "gpu.clock.core"
+    label: str        # human label for the report
+    unit: str
+    min: float
+    avg: float
+    max: float
+    samples: int
+
+
+@dataclass
+class _Tick:
+    dt: float                    # seconds this tick represents (for dwell-time weighting)
+    values: dict[str, float]     # reading key -> value across all sources (Nones dropped)
+    throttle: list[str]          # active throttle reasons this tick
+    power_capped: bool
+    lost: bool                   # query timeout / no GPU response this tick
+
+
+@dataclass
+class StressResult:
+    load: str                       # "command: …" | "auto: gpu-burn" | "monitor-only"
+    duration: float                 # seconds actually monitored
+    samples: int
+    interval: float
+    stats: list[MetricStat] = field(default_factory=list)
+    peak_temp: float | None = None
+    peak_mem_temp: float | None = None
+    avg_temp: float | None = None
+    time_above: dict[int, float] = field(default_factory=dict)  # threshold °C -> seconds at/above
+    max_power: float | None = None
+    power_limit: float | None = None
+    power_capped: bool = False
+    throttled: bool = False
+    throttle_reasons: list[str] = field(default_factory=list)
+    gpu_lost: bool = False
+    faults: list[str] = field(default_factory=list)             # Xid/VA-space titles in the window
+    aborted: bool = False                                        # Ctrl-C or the load exited early
+    severity: str = health.OK
+    verdict: str = ""
+
+
+# --- load resolution ------------------------------------------------------------------
+
+def available_loaders() -> list[str]:
+    """Known GPU load tools found on PATH (heaviest first)."""
+    return [name for name, _ in _LOADERS if shutil.which(name)]
+
+
+def _start_load(command: list[str] | None, duration: float) -> tuple[subprocess.Popen | None, str]:
+    """Start the load process and return (proc, description). proc is None for monitor-only."""
+    if command:
+        try:
+            proc = subprocess.Popen(command, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+            return proc, "command: " + " ".join(command)
+        except (OSError, ValueError) as exc:
+            return None, f"monitor-only (command failed to start: {exc})"
+    for name, build in _LOADERS:
+        if shutil.which(name):
+            try:
+                proc = subprocess.Popen(build(duration), stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+                return proc, f"auto: {name}"
+            except (OSError, ValueError):
+                continue
+    return None, "monitor-only"
+
+
+def _stop_load(proc: subprocess.Popen | None) -> None:
+    if proc is None or proc.poll() is not None:
+        return
+    proc.terminate()
+    try:
+        proc.wait(timeout=5)
+    except subprocess.TimeoutExpired:
+        proc.kill()
+
+
+# --- throttle / fault probes ----------------------------------------------------------
+
+def _throttle_state() -> tuple[list[str], bool]:
+    """(active throttle reasons, power-capped) decoded from the clocks-event bitmask."""
+    if shutil.which("nvidia-smi") is None:
+        return [], False
+    raw = ""
+    for field_name in ("clocks_event_reasons.active", "clocks_throttle_reasons.active"):
+        try:
+            proc = subprocess.run(
+                ["nvidia-smi", f"--query-gpu={field_name}", "--format=csv,noheader"],
+                capture_output=True, text=True, timeout=5,
+            )
+        except (subprocess.SubprocessError, OSError):
+            continue
+        raw = proc.stdout.strip().splitlines()[0].strip() if proc.stdout.strip() else ""
+        if raw and raw.lower() not in ("n/a", "not supported", "[n/a]"):
+            break
+    try:
+        bits = int(raw, 16)
+    except ValueError:
+        return [], False
+    reasons = [name for bit, name in _THROTTLE_BITS.items() if bits & bit]
+    return reasons, bool(bits & _POWERCAP_BIT)
+
+
+def _faults_since(start_ts: float) -> list[str]:
+    """Titles of GPU/PCIe/hardware faults logged to the kernel journal since the run began."""
+    out = health._journalctl(["-k", "--no-pager", "-o", "cat", "--since", f"@{int(start_ts)}"])
+    if not out:
+        return []
+    return [f.title for f in health.scan_journal_text(out)
+            if f.category in ("GPU", "PCIe", "Hardware", "Kernel")]
+
+
+def _tick_values(sample: Sample) -> tuple[dict[str, float], bool]:
+    """Reading key -> value across all sources (Nones dropped), plus whether the GPU
+    failed to respond (an nvidia-smi query timeout — a hang/lost signal)."""
+    values: dict[str, float] = {}
+    lost = False
+    for r in sample.readings:
+        if r.source == "gpu" and r.metric == "status" and r.label == "query-timeout":
+            lost = True
+        if r.value is not None:
+            values[r.key] = r.value
+    return values, lost
+
+
+# --- pure analysis (unit-testable, no IO) ---------------------------------------------
+
+_REPORT_KEYS = {
+    "gpu.temp": ("GPU core temp", "°C"),
+    "gpu.temp.memory": ("GPU memory temp", "°C"),
+    "gpu.power": ("GPU power", "W"),
+    "gpu.util": ("GPU utilization", "%"),
+    "gpu.mem_util": ("VRAM controller util", "%"),
+    "gpu.clock.core": ("Core clock", "MHz"),
+    "gpu.clock.memory": ("Memory clock", "MHz"),
+    "gpu.fan": ("Fan", "%"),
+    "gpu.mem_used": ("VRAM used", "MiB"),
+    "cpu.temp": ("CPU temp", "°C"),
+}
+
+
+def summarize(ticks: list[_Tick], *, load: str, interval: float, faults: list[str],
+              thresholds=DEFAULT_THRESHOLDS) -> StressResult:
+    """Build a StressResult from collected ticks — pure, so it's tested with synthetic input."""
+    duration = sum(t.dt for t in ticks)
+    result = StressResult(load=load, duration=round(duration, 1), samples=len(ticks),
+                          interval=interval, faults=faults)
+
+    series: dict[str, list[float]] = {}
+    throttle_seen: set[str] = set()
+    time_above = {th: 0.0 for th in thresholds}
+    for t in ticks:
+        for key, value in t.values.items():
+            series.setdefault(key, []).append(value)
+        throttle_seen.update(t.throttle)
+        if t.power_capped:
+            result.power_capped = True
+        if t.lost:
+            result.gpu_lost = True
+        core = t.values.get("gpu.temp")
+        if core is not None:
+            for th in thresholds:
+                if core >= th:
+                    time_above[th] += t.dt
+
+    for key, (label, unit) in _REPORT_KEYS.items():
+        vals = series.get(key)
+        if not vals:
+            continue
+        stat = MetricStat(key, label, unit, round(min(vals), 1),
+                          round(sum(vals) / len(vals), 1), round(max(vals), 1), len(vals))
+        result.stats.append(stat)
+        if key == "gpu.temp":
+            result.peak_temp, result.avg_temp = stat.max, stat.avg
+        elif key == "gpu.temp.memory":
+            result.peak_mem_temp = stat.max
+        elif key == "gpu.power":
+            result.max_power = stat.max
+
+    # power_limit isn't a reported metric (it's ~constant); pull it from the raw series.
+    if "gpu.power_limit" in series:
+        result.power_limit = max(series["gpu.power_limit"])
+
+    result.throttle_reasons = sorted(throttle_seen)
+    result.throttled = bool(throttle_seen)
+    result.time_above = {th: round(secs, 1) for th, secs in time_above.items() if secs > 0}
+
+    _verdict(result)
+    return result
+
+
+def _verdict(r: StressResult) -> None:
+    """Set severity + a plain-language conclusion from the gathered signals."""
+    peak = f"{r.peak_temp:.0f}°C" if r.peak_temp is not None else "?"
+    if r.gpu_lost or any(t for t in r.faults):
+        r.severity = health.CRITICAL
+        cause = "; ".join(r.faults) if r.faults else "the GPU stopped responding (query timeout)"
+        r.verdict = (f"GPU fault during the stress run: {cause}. This reproduces the crash under "
+                     f"load — capture/keep these logs. Peak core temp {peak}.")
+        return
+    if r.throttled:
+        r.severity = health.WARNING
+        r.verdict = (f"Thermal/HW throttling detected ({', '.join(r.throttle_reasons)}) — the GPU "
+                     f"held clocks back to stay safe. Peak core temp {peak}. Improve cooling/airflow.")
+        return
+    if r.peak_temp is not None and r.peak_temp >= 90:
+        r.severity = health.WARNING
+        r.verdict = (f"No fault, but the core peaked at {peak} — hot. Watch GDDR6/VRM cooling; "
+                     "sustained high temps shorten the card's life and precede instability.")
+        return
+    if r.peak_temp is None:
+        r.severity = health.INFO
+        r.verdict = "No GPU telemetry was captured (nvidia-smi unavailable?)."
+        return
+    capped = " (power-limited — hitting the cap, which is normal)" if r.power_capped else ""
+    r.verdict = f"Stable: peaked at {peak} with no faults or throttling{capped}."
+
+
+# --- the run loop (IO) ----------------------------------------------------------------
+
+def run(duration: float = 120.0, interval: float = 0.5, command: list[str] | None = None,
+        thresholds=DEFAULT_THRESHOLDS, on_tick: Callable[[Sample, float], None] | None = None,
+        should_stop: Callable[[], bool] | None = None) -> StressResult:
+    """Drive a GPU load for ``duration`` seconds, sampling every ``interval``, and report.
+
+    Stops early on Ctrl-C, if a GPU query times out (likely hang), if the load process exits, or
+    when ``should_stop()`` returns True (the GUI's Stop button). ``on_tick(sample, elapsed)`` is
+    called each tick for live display.
+    """
+    sampler = Sampler(available_sources())
+    proc, load_desc = _start_load(command, duration)
+    start = time.monotonic()
+    start_ts = time.time()
+    ticks: list[_Tick] = []
+    last = start
+    aborted = False
+    try:
+        while True:
+            sample = sampler.sample()
+            now = time.monotonic()
+            dt = now - last
+            last = now
+            values, lost = _tick_values(sample)
+            reasons, capped = _throttle_state()
+            ticks.append(_Tick(dt=dt, values=values, throttle=reasons, power_capped=capped, lost=lost))
+            if on_tick is not None:
+                on_tick(sample, now - start)
+            if lost:  # GPU stopped responding — stop now, it may be hung/lost
+                break
+            if should_stop is not None and should_stop():  # GUI Stop button
+                aborted = True
+                break
+            if proc is not None and proc.poll() is not None:  # the load finished/exited
+                break
+            if (now - start) >= duration:
+                break
+            time.sleep(max(0.0, interval - (time.monotonic() - now)))
+    except KeyboardInterrupt:
+        aborted = True
+    finally:
+        _stop_load(proc)
+
+    faults = _faults_since(start_ts)
+    result = summarize(ticks, load=load_desc, interval=interval, faults=faults, thresholds=thresholds)
+    result.aborted = aborted or (proc is not None and command is not None and result.duration < duration - interval)
+    return result

src/rigdoctor/core/wrap.py

@@ -40,16 +40,20 @@ def launch_option() -> str:
     return f"{quoted} wrap %command%"
 
 
-def run(command: list[str]) -> int:
+def run(command: list[str], game: str | None = None) -> int:
     """Start a focused capture (unless one's already running), run the game, then stop it.
-    Returns the game's exit code so Steam sees the right status."""
+    Returns the game's exit code so Steam sees the right status.
+
+    `game` overrides name detection — used by `games play` for a custom game (e.g. SPT), where
+    there's no SteamAppId and the bare script name (tarkov.sh) wouldn't tag the capture usefully.
+    """
     from . import diagnostic, reccontrol
 
     if not command:
         print("usage: rigdoctor wrap %command%  (set as a Steam launch option)", file=sys.stderr)
         return 2
 
-    game = game_name_from_env() or os.path.basename(command[0])
+    game = game or game_name_from_env() or os.path.basename(command[0])
     started = False
     if not reccontrol.running_pid():  # don't disturb an existing capture
         started = diagnostic.start(game=game) is not None

src/rigdoctor/gui/diagnostic_dialog.py

@@ -143,7 +143,7 @@ class DiagnosticDialog(QDialog):
         lines.append("\nCapture summary:\n" + render_summary(summary))
 
         since = (summary.start - 60) if summary.start else None
-        logs = gamelogs.collect(since=since)  # scoped to this session
+        logs = gamelogs.collect(since=since, game=result.game)  # scoped to this session
         if logs:
             lines.append("\nGame/Proton/Steam logs for this session:\n" + logs)
         sys_logs = syslogs.collect(since=since)  # kernel log + crashed-process records

src/rigdoctor/gui/games_page.py

@@ -16,6 +16,7 @@ from PySide6.QtWidgets import (
     QApplication,
     QCheckBox,
     QDialog,
+    QFileDialog,
     QFrame,
     QHBoxLayout,
     QLabel,
@@ -29,6 +30,7 @@ from PySide6.QtWidgets import (
 
 from ..config import load_config, update_config
 from .diagnostic_dialog import DiagnosticDialog
+from .minidump_dialog import MinidumpDialog
 from .theme import ACCENT, GOOD, MUTED, WARN
 
 
@@ -79,6 +81,7 @@ class GamesPage(QWidget):
     _scanned = Signal(object)          # steam.ScanResult
     new_count_changed = Signal(int)    # newly-installed game count (for the nav badge)
     _diag_done = Signal(object)        # DiagnosticResult — focused capture analyzed
+    _dump_parsed = Signal(object)      # minidump.MinidumpReport — imported .dmp (or None)
 
     def __init__(self) -> None:
         super().__init__()
@@ -86,6 +89,7 @@ class GamesPage(QWidget):
         self._libraries_ready.connect(self._render_libraries)
         self._scanned.connect(self._render_games)
         self._diag_done.connect(self._on_diag_done)
+        self._dump_parsed.connect(self._on_dump_parsed)
         self._busy = False
         self._new_appids: set[str] = set()
         self._extra_games: list = []  # non-Steam (Lutris/Heroic), appended after a scan
@@ -103,9 +107,18 @@ class GamesPage(QWidget):
         self._status = QLabel("")
         self._status.setObjectName("Muted")
         header.addWidget(self._status)
+        # Import a Windows crash dump (.dmp) from a Proton game and analyze it with AI.
+        # Shown only when an AI provider is configured (AI analysis is the point).
+        self._import_btn = QPushButton("Import crash dump…")
+        self._import_btn.clicked.connect(self._import_dump)
+        header.addWidget(self._import_btn)
         self._autocap_btn = QPushButton("Auto-capture…")
         self._autocap_btn.clicked.connect(self._show_autocapture)
         header.addWidget(self._autocap_btn)
+        # Add a game no launcher reports (e.g. SPT / standalone mod launchers).
+        self._add_btn = QPushButton("Add game…")
+        self._add_btn.clicked.connect(self._add_custom_game)
+        header.addWidget(self._add_btn)
         self._rescan_btn = QPushButton("Rescan")
         self._rescan_btn.setObjectName("PrimaryButton")
         self._rescan_btn.clicked.connect(self.refresh)
@@ -192,6 +205,7 @@ class GamesPage(QWidget):
         self._load_cached()                       # instant display from the last scan
         QTimer.singleShot(400, self.refresh)      # then rescan in the background on launch
         self._check_crash()                       # surface an interrupted (crashed) diagnostic
+        self._refresh_import_btn()                # show Import only if AI is configured
 
     # --- loading ----------------------------------------------------------------------
 
@@ -225,7 +239,9 @@ class GamesPage(QWidget):
             ]
             self._libraries_ready.emit(libs)
             try:
-                self._extra_games = launchers.scan()  # Lutris / Heroic (non-Steam)
+                from ..core import customgames
+                # non-Steam: Lutris/Heroic + user-added games (SPT etc.)
+                self._extra_games = list(launchers.scan()) + customgames.scan()
             except Exception:
                 self._extra_games = []
             self._scanned.emit(steam.rescan())
@@ -413,6 +429,83 @@ class GamesPage(QWidget):
         reccontrol.stop_background()
         self._banner.hide()
 
+    def _add_custom_game(self) -> None:
+        """Manually add a game no launcher reports (e.g. SPT): name + an optional launch
+        command/script (so it can be launched under crash-capture) and log folder."""
+        from ..core import customgames
+
+        dlg = QDialog(self)
+        dlg.setWindowTitle("Add game")
+        dlg.setMinimumWidth(560)
+        v = QVBoxLayout(dlg)
+        v.setContentsMargins(20, 18, 20, 16)
+        v.setSpacing(10)
+
+        intro = QLabel(
+            "Add a game no launcher reports — a standalone mod launcher like SPT, an itch.io "
+            "download, or any hand-installed game.")
+        intro.setWordWrap(True)
+        v.addWidget(intro)
+
+        name_edit = QLineEdit()
+        name_edit.setPlaceholderText("SPT")
+        v.addWidget(QLabel("Game name"))
+        v.addWidget(name_edit)
+
+        cmd_edit = QLineEdit()
+        cmd_edit.setPlaceholderText("e.g. /run/media/.../Escape-From-Tarkov/tarkov.sh")
+        cmd_row = QHBoxLayout()
+        cmd_row.addWidget(cmd_edit, 1)
+        cmd_browse = QPushButton("Browse…")
+        cmd_row.addWidget(cmd_browse, 0)
+        v.addWidget(QLabel("Launch command / script (optional — enables launch + auto-capture)"))
+        v.addLayout(cmd_row)
+
+        log_edit = QLineEdit()
+        log_edit.setPlaceholderText("auto-detected from the script's folder (its logs/ subfolder)")
+        log_row = QHBoxLayout()
+        log_row.addWidget(log_edit, 1)
+        log_browse = QPushButton("Browse…")
+        log_row.addWidget(log_browse, 0)
+        v.addWidget(QLabel("Log folder (optional — read into crash diagnostics)"))
+        v.addLayout(log_row)
+
+        def _pick_command() -> None:
+            path, _ = QFileDialog.getOpenFileName(dlg, "Select the launch script/executable")
+            if path:
+                cmd_edit.setText(path)
+
+        def _pick_logdir() -> None:
+            path = QFileDialog.getExistingDirectory(dlg, "Select the game's log folder")
+            if path:
+                log_edit.setText(path)
+
+        cmd_browse.clicked.connect(_pick_command)
+        log_browse.clicked.connect(_pick_logdir)
+
+        buttons = QHBoxLayout()
+        buttons.addStretch(1)
+        cancel = QPushButton("Cancel")
+        cancel.clicked.connect(dlg.reject)
+        buttons.addWidget(cancel)
+        add = QPushButton("Add")
+        add.setObjectName("PrimaryButton")
+        add.setDefault(True)
+        add.clicked.connect(dlg.accept)
+        buttons.addWidget(add)
+        v.addLayout(buttons)
+
+        if dlg.exec() != QDialog.DialogCode.Accepted:
+            return
+        name = name_edit.text().strip()
+        if not name:
+            return
+        if customgames.add(name, command=cmd_edit.text().strip() or None,
+                           logdir=log_edit.text().strip() or None):
+            self.refresh()
+        else:
+            QMessageBox.information(self, "Add game", f"'{name}' is already in your games.")
+
     def _show_autocapture(self) -> None:
         from ..core import wrap
 
@@ -450,6 +543,49 @@ class GamesPage(QWidget):
         v.addLayout(buttons)
         dlg.exec()
 
+    # --- import a crash dump (.dmp) ---------------------------------------------------
+
+    def _refresh_import_btn(self) -> None:
+        from ..core import ai
+
+        self._import_btn.setVisible(ai.is_configured())
+
+    def _import_dump(self) -> None:
+        from ..core import ai
+
+        if not ai.is_configured():
+            QMessageBox.information(
+                self, "RigDoctor",
+                "Set up an AI provider first (Settings → AI assistant) to analyze a crash dump.")
+            return
+        path, _ = QFileDialog.getOpenFileName(
+            self, "Import crash dump", os.path.expanduser("~"),
+            "Crash dumps (*.dmp);;All files (*)")
+        if not path:
+            return
+        self._import_btn.setEnabled(False)
+        self._status.setText("Parsing crash dump…")
+        threading.Thread(target=self._work_import, args=(path,), daemon=True).start()
+
+    def _work_import(self, path: str) -> None:
+        from ..core import minidump
+
+        try:
+            report = minidump.parse(path)  # parses + runs minidump_stackwalk if installed
+        except Exception:
+            report = None
+        self._dump_parsed.emit(report)
+
+    def _on_dump_parsed(self, report) -> None:
+        self._import_btn.setEnabled(True)
+        self._status.setText("")
+        if report is None or not report.ok:
+            detail = report.error if report is not None else "Couldn't read the file."
+            QMessageBox.warning(
+                self, "Import crash dump", f"Couldn't analyze the dump — {detail}")
+            return
+        MinidumpDialog(report, self).exec()
+
     # --- hard-crash recovery ----------------------------------------------------------
 
     def _check_crash(self) -> None:
@@ -498,6 +634,7 @@ class GamesPage(QWidget):
         # Viewing the list acknowledges the new games: clear the sidebar badge. The NEW
         # tags stay on the rows for this session so the user can still spot them.
         super().showEvent(event)
+        self._refresh_import_btn()  # AI may have been configured since this page was built
         if self._new_appids:
             from ..core import steam
 

src/rigdoctor/gui/health_page.py

@@ -39,6 +39,9 @@ class HealthPage(QWidget):
         self._status = QLabel("")
         self._status.setObjectName("Muted")
         header.addWidget(self._status)
+        self._stress_btn = QPushButton("Stress test…")
+        self._stress_btn.clicked.connect(self._open_stress)
+        header.addWidget(self._stress_btn)
         self._run_btn = QPushButton("Run health report")
         self._run_btn.setObjectName("PrimaryButton")
         self._run_btn.clicked.connect(self._run)
@@ -59,6 +62,11 @@ class HealthPage(QWidget):
 
         QTimer.singleShot(300, self._run)  # auto-run shortly after the window opens
 
+    def _open_stress(self) -> None:
+        from .stress_dialog import StressDialog
+
+        StressDialog(self).exec()
+
     def _run(self) -> None:
         self._run_btn.setEnabled(False)
         self._status.setText("Scanning logs, SMART, and driver…")

src/rigdoctor/gui/minidump_dialog.py

@@ -0,0 +1,182 @@
+"""Results view for an imported crash dump (.dmp, M14): parsed summary + AI explanation.
+
+Mirrors :class:`DiagnosticDialog` — the same opt-in, streamed "Explain with AI" flow (D24),
+applied to a Windows minidump parsed by :mod:`core.minidump` instead of a sensor capture.
+"""
+
+from __future__ import annotations
+
+import threading
+from pathlib import Path
+
+from PySide6.QtCore import Qt, Signal
+from PySide6.QtGui import QFont, QTextCursor
+from PySide6.QtWidgets import (
+    QDialog,
+    QFrame,
+    QHBoxLayout,
+    QLabel,
+    QMessageBox,
+    QPushButton,
+    QScrollArea,
+    QTextEdit,
+    QVBoxLayout,
+    QWidget,
+)
+
+from ..core import minidump
+from .widgets import finding_card
+
+
+class MinidumpDialog(QDialog):
+    _chunk = Signal(str)         # streamed token delta (worker thread -> GUI)
+    _explained = Signal(object)  # (ok, full_text) when the AI stream finishes
+
+    def __init__(self, report: minidump.MinidumpReport, parent=None) -> None:
+        super().__init__(parent)
+        self._report = report
+        self._stream_view = None
+        self._stream_status = None
+        self._chunk.connect(self._on_chunk)
+        self._explained.connect(self._on_explained)
+        name = Path(report.path).name
+        self.setWindowTitle(f"Crash dump — {name}")
+        self.resize(660, 680)
+
+        root = QVBoxLayout(self)
+        root.setContentsMargins(20, 18, 20, 16)
+        root.setSpacing(14)
+
+        title = QLabel(f"Crash dump — {name}")
+        title.setObjectName("PageTitle")
+        root.addWidget(title)
+
+        scroll = QScrollArea()
+        scroll.setWidgetResizable(True)
+        scroll.setFrameShape(QFrame.Shape.NoFrame)
+        scroll.setStyleSheet("background: transparent;")
+        body = QWidget()
+        col = QVBoxLayout(body)
+        col.setContentsMargins(0, 0, 0, 0)
+        col.setSpacing(10)
+        col.setAlignment(Qt.AlignmentFlag.AlignTop)
+
+        # Parsed summary (crash reason / faulting module / OS / CPU / modules) — monospace.
+        summary_head = QLabel("Dump summary")
+        summary_head.setStyleSheet("font-weight: 700; background: transparent;")
+        col.addWidget(summary_head)
+        summary = QLabel(minidump.to_text(report))
+        summary.setObjectName("Report")
+        summary.setFont(QFont("monospace"))
+        summary.setTextInteractionFlags(Qt.TextInteractionFlag.TextSelectableByMouse)
+        summary.setWordWrap(False)
+        summary.setStyleSheet(
+            "background: #0d0f13; color: #cfd3da; border: 1px solid #2a2f39; "
+            "border-radius: 8px; padding: 10px;"
+        )
+        col.addWidget(summary)
+
+        findings = minidump.to_findings(report)
+        find_head = QLabel(f"Findings ({len(findings)})")
+        find_head.setStyleSheet("font-weight: 700; background: transparent;")
+        col.addWidget(find_head)
+        for finding in findings:
+            col.addWidget(finding_card(finding))
+
+        if report.stackwalk:  # only when an external stackwalker was available
+            sw_head = QLabel("minidump_stackwalk output")
+            sw_head.setStyleSheet("font-weight: 700; background: transparent;")
+            col.addWidget(sw_head)
+            sw = QTextEdit()
+            sw.setObjectName("Report")
+            sw.setReadOnly(True)
+            sw.setFont(QFont("monospace"))
+            sw.setPlainText(report.stackwalk)
+            sw.setMinimumHeight(160)
+            col.addWidget(sw)
+
+        scroll.setWidget(body)
+        root.addWidget(scroll, 1)
+
+        buttons = QHBoxLayout()
+        self._explain_btn = QPushButton("Explain with AI")
+        self._explain_btn.clicked.connect(self._explain_with_ai)
+        from ..core import ai
+        self._explain_btn.setVisible(ai.is_configured())  # opt-in only; hidden if not set up
+        buttons.addWidget(self._explain_btn)
+        buttons.addStretch(1)
+        close = QPushButton("Close")
+        close.setObjectName("PrimaryButton")
+        close.clicked.connect(self.accept)
+        buttons.addWidget(close)
+        root.addLayout(buttons)
+
+    # --- AI explanation (M14, D24) — streamed; runs only on this button press ----------
+    def _explain_with_ai(self) -> None:
+        from ..core import ai
+
+        if not ai.is_local():  # cloud provider → explicit consent before sending data
+            confirm = QMessageBox.question(
+                self, "Send to AI provider",
+                f"This sends the parsed crash dump to {ai.provider_label()}.\n\nContinue?",
+                QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
+                QMessageBox.StandardButton.No,
+            )
+            if confirm != QMessageBox.StandardButton.Yes:
+                return
+        self._explain_btn.setEnabled(False)
+        dialog = self._open_stream_dialog()
+        threading.Thread(target=self._work_explain, daemon=True).start()
+        dialog.exec()  # streaming fills the view live via signals during this nested loop
+        self._stream_view = self._stream_status = None
+        self._explain_btn.setEnabled(True)
+
+    def _work_explain(self) -> None:
+        from ..core import ai
+
+        text = minidump.to_ai_text(self._report)
+        ok, reply = ai.explain_stream(text, on_chunk=lambda d: self._chunk.emit(d))
+        self._explained.emit((ok, reply))
+
+    def _on_chunk(self, delta: str) -> None:
+        if self._stream_view is None:
+            return
+        self._stream_view.moveCursor(QTextCursor.MoveOperation.End)
+        self._stream_view.insertPlainText(delta)  # live plain text as tokens arrive
+        self._stream_view.ensureCursorVisible()
+
+    def _on_explained(self, result) -> None:
+        ok, text = result
+        if self._stream_view is not None:
+            if ok:
+                self._stream_view.setMarkdown(text)  # re-render the finished answer as Markdown
+            else:
+                self._stream_view.setPlainText(f"AI explanation failed:\n\n{text}")
+        if self._stream_status is not None:
+            self._stream_status.setText(
+                "AI-generated suggestions — verify before acting, especially anything that changes "
+                "settings or data." if ok else "The request failed.")
+
+    def _open_stream_dialog(self) -> QDialog:
+        """A live dialog the AI streams into; finalized to rendered Markdown when done."""
+        from ..core import ai
+
+        dlg = QDialog(self)
+        dlg.setWindowTitle(f"AI explanation — {ai.provider_label()}")
+        dlg.resize(620, 520)
+        lay = QVBoxLayout(dlg)
+        view = QTextEdit()
+        view.setObjectName("Report")
+        view.setReadOnly(True)
+        lay.addWidget(view)
+        status = QLabel("Streaming from the model…")
+        status.setObjectName("Muted")
+        status.setWordWrap(True)
+        lay.addWidget(status)
+        close = QPushButton("Close")
+        close.setObjectName("PrimaryButton")
+        close.clicked.connect(dlg.accept)
+        lay.addWidget(close, alignment=Qt.AlignmentFlag.AlignRight)
+        self._stream_view = view
+        self._stream_status = status
+        return dlg

src/rigdoctor/gui/stress_dialog.py

@@ -0,0 +1,157 @@
+"""GPU stress + thermal-monitor dialog (GUI front-end for core/stress.py).
+
+Runs the stress monitor in a background thread, streams a live one-line readout, and shows the
+rendered result (telemetry stats + verdict) when it finishes. A Stop button ends the run early
+via a cooperative flag; closing the dialog mid-run stops it too.
+"""
+
+from __future__ import annotations
+
+import threading
+
+from PySide6.QtCore import Qt, Signal
+from PySide6.QtGui import QFont
+from PySide6.QtWidgets import (
+    QDialog,
+    QHBoxLayout,
+    QLabel,
+    QLineEdit,
+    QPushButton,
+    QSpinBox,
+    QTextEdit,
+    QVBoxLayout,
+)
+
+
+class StressDialog(QDialog):
+    _tick = Signal(str)      # live one-line readout (worker thread -> GUI)
+    _done = Signal(object)   # stress.StressResult when the run finishes
+
+    def __init__(self, parent=None) -> None:
+        super().__init__(parent)
+        self._stop = threading.Event()
+        self._running = False
+        self._tick.connect(self._on_tick)
+        self._done.connect(self._on_done)
+        self.setWindowTitle("GPU stress + thermal monitor")
+        self.resize(640, 460)
+
+        root = QVBoxLayout(self)
+        root.setContentsMargins(20, 18, 20, 16)
+        root.setSpacing(12)
+
+        intro = QLabel(
+            "Run a GPU load and closely watch temps. Reports peak/sustained temps, time spent "
+            "hot, throttling, and any GPU fault (Xid / driver freeze) during the run.")
+        intro.setWordWrap(True)
+        root.addWidget(intro)
+
+        from ..core import stress
+        loaders = stress.available_loaders()
+        self._mode = QLabel(
+            f"Load tool detected: {loaders[0]} — it'll drive the load." if loaders else
+            "No GPU load tool installed → MONITOR-ONLY: start this, then launch your game; "
+            "it tracks temps while you play. (Or give a command below.)")
+        self._mode.setObjectName("Muted")
+        self._mode.setWordWrap(True)
+        root.addWidget(self._mode)
+
+        form = QHBoxLayout()
+        form.addWidget(QLabel("Duration (s):"))
+        self._duration = QSpinBox()
+        self._duration.setRange(5, 3600)
+        self._duration.setValue(120)
+        form.addWidget(self._duration)
+        form.addSpacing(12)
+        form.addWidget(QLabel("Command (optional):"))
+        self._command = QLineEdit()
+        self._command.setPlaceholderText("e.g. /…/tarkov.sh  or  gpu-burn 60")
+        form.addWidget(self._command, 1)
+        root.addLayout(form)
+
+        self._live = QLabel("—")
+        self._live.setFont(QFont("monospace"))
+        self._live.setStyleSheet("background: #0d0f13; color: #cfd3da; border: 1px solid #2a2f39; "
+                                 "border-radius: 8px; padding: 8px;")
+        root.addWidget(self._live)
+
+        self._report = QTextEdit()
+        self._report.setReadOnly(True)
+        self._report.setFont(QFont("monospace"))
+        self._report.setVisible(False)
+        root.addWidget(self._report, 1)
+
+        buttons = QHBoxLayout()
+        buttons.addStretch(1)
+        self._stop_btn = QPushButton("Stop")
+        self._stop_btn.setEnabled(False)
+        self._stop_btn.clicked.connect(self._on_stop)
+        buttons.addWidget(self._stop_btn)
+        self._start_btn = QPushButton("Start")
+        self._start_btn.setObjectName("PrimaryButton")
+        self._start_btn.clicked.connect(self._on_start)
+        buttons.addWidget(self._start_btn)
+        root.addLayout(buttons)
+
+    def _on_start(self) -> None:
+        if self._running:
+            return
+        self._running = True
+        self._stop.clear()
+        self._start_btn.setEnabled(False)
+        self._stop_btn.setEnabled(True)
+        self._report.setVisible(False)
+        self._live.setText("starting…")
+        duration = float(self._duration.value())
+        command_text = self._command.text().strip()
+        threading.Thread(target=self._work, args=(duration, command_text), daemon=True).start()
+
+    def _work(self, duration: float, command_text: str) -> None:
+        import shlex
+
+        from ..core import stress
+
+        command = shlex.split(command_text) if command_text else None
+
+        def _tick(sample, elapsed) -> None:
+            by = {r.key: r for r in sample.readings}
+            from ..render import format_raw
+            bits = [f"{elapsed:5.0f}s"]
+            for key, tag in (("gpu.temp", "core"), ("gpu.power", "pwr"),
+                             ("gpu.util", "util"), ("gpu.clock.core", "clk"),
+                             ("gpu.temp.memory", "vram")):
+                r = by.get(key)
+                if r is not None and r.value is not None:
+                    bits.append(f"{tag} {format_raw(r.value, r.unit)}")
+            self._tick.emit("   ".join(bits))
+
+        try:
+            result = stress.run(duration=duration, interval=0.5, command=command,
+                                on_tick=_tick, should_stop=self._stop.is_set)
+        except Exception as exc:  # never let a worker crash take down the dialog
+            result = exc
+        self._done.emit(result)
+
+    def _on_tick(self, text: str) -> None:
+        self._live.setText(text)
+
+    def _on_done(self, result) -> None:
+        from ..render import render_stress
+
+        self._running = False
+        self._start_btn.setEnabled(True)
+        self._stop_btn.setEnabled(False)
+        if isinstance(result, Exception):
+            self._report.setPlainText(f"Stress run failed: {result}")
+        else:
+            self._report.setPlainText(render_stress(result))
+        self._report.setVisible(True)
+
+    def _on_stop(self) -> None:
+        self._stop.set()
+        self._stop_btn.setEnabled(False)
+        self._live.setText("stopping…")
+
+    def closeEvent(self, event) -> None:  # stop the run if the dialog is closed mid-flight
+        self._stop.set()
+        super().closeEvent(event)

src/rigdoctor/render.py

@@ -118,6 +118,32 @@ def render_health(findings: list, title: str = "Health report") -> str:
     return "\n".join(lines).rstrip()
 
 
+def render_stress(result) -> str:
+    """Render a stress.StressResult: telemetry stats, temp dwell time, and the verdict."""
+    lines = ["GPU stress + thermal monitor", ""]
+    lines.append(f"  Load     : {result.load}")
+    lines.append(f"  Duration : {_fmt_duration(result.duration)}  ·  {result.samples} samples "
+                 f"@ {result.interval:g}s" + ("  (stopped early)" if result.aborted else ""))
+    if result.stats:
+        lines += ["", f"  {'Metric':<22}{'min':>12}{'avg':>12}{'max':>12}"]
+        for s in result.stats:
+            u = s.unit
+            lines.append(f"  {s.label:<22}{format_raw(s.min, u):>12}{format_raw(s.avg, u):>12}"
+                         f"{format_raw(s.max, u):>12}")
+    if result.time_above:
+        spans = "  ".join(f"≥{th}°C: {_fmt_duration(secs)}" for th, secs in sorted(result.time_above.items()))
+        lines += ["", f"  Time at temp (core):  {spans}"]
+    if result.max_power is not None and result.power_limit:
+        cap = "  — hit the power cap" if result.power_capped else ""
+        lines.append(f"  Power peak: {result.max_power:.0f} W of {result.power_limit:.0f} W limit{cap}")
+    if result.throttle_reasons:
+        lines.append(f"  Throttling: {', '.join(result.throttle_reasons)}")
+    if result.faults:
+        lines.append(f"  Faults   : {'; '.join(result.faults)}")
+    lines += ["", f"[{_SEV_LABEL.get(result.severity, '?')}] {result.verdict}"]
+    return "\n".join(lines)
+
+
 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 ""

tests/test_customgames.py

@@ -0,0 +1,85 @@
+"""Tests for user-added games (M6): add/remove/scan of titles no launcher reports (e.g. SPT)."""
+
+import tempfile
+import unittest
+from pathlib import Path
+from unittest import mock
+
+from rigdoctor.core import customgames
+
+
+class CustomGamesTests(unittest.TestCase):
+    def setUp(self):
+        self._tmp = tempfile.TemporaryDirectory()
+        self._file = Path(self._tmp.name) / "custom-games.json"
+        self._patch = mock.patch.object(customgames.config, "CUSTOM_GAMES_FILE", self._file)
+        self._patch.start()
+
+    def tearDown(self):
+        self._patch.stop()
+        self._tmp.cleanup()
+
+    def test_missing_file_scans_empty(self):
+        self.assertEqual(customgames.scan(), [])
+        self.assertEqual(customgames.names(), [])
+
+    def test_add_then_scan_returns_game(self):
+        self.assertTrue(customgames.add("SPT"))
+        games = customgames.scan()
+        self.assertEqual(len(games), 1)
+        self.assertEqual(games[0].name, "SPT")
+        self.assertEqual(games[0].launcher, "custom")
+        self.assertTrue(self._file.exists())  # persisted
+
+    def test_add_is_idempotent_case_insensitive(self):
+        self.assertTrue(customgames.add("SPT"))
+        self.assertFalse(customgames.add("spt"))   # already present
+        self.assertFalse(customgames.add("   "))    # blank
+        self.assertEqual(customgames.names(), ["SPT"])
+
+    def test_remove(self):
+        customgames.add("SPT")
+        customgames.add("Minecraft")
+        self.assertTrue(customgames.remove("spt"))  # case-insensitive
+        self.assertEqual(customgames.names(), ["Minecraft"])
+        self.assertFalse(customgames.remove("nope"))
+
+    def test_scan_sorted_by_name(self):
+        for n in ("Zomboid", "Apex", "SPT"):
+            customgames.add(n)
+        self.assertEqual([g.name for g in customgames.scan()], ["Apex", "SPT", "Zomboid"])
+
+    def test_command_and_logdir_stored_and_resolved(self):
+        logs = Path(self._tmp.name) / "logs"
+        logs.mkdir()
+        sh = Path(self._tmp.name) / "tarkov.sh"
+        sh.write_text("#!/bin/sh\n")
+        self.assertTrue(customgames.add("SPT", command=str(sh), logdir=str(logs)))
+        self.assertEqual(customgames.command("SPT"), [str(sh)])
+        self.assertEqual(customgames.log_dir("SPT"), str(logs))
+
+    def test_logdir_inferred_from_sibling_logs(self):
+        # A command with a sibling logs/ dir (SPT's layout) → logdir auto-detected.
+        sh = Path(self._tmp.name) / "tarkov.sh"
+        sh.write_text("#!/bin/sh\n")
+        (Path(self._tmp.name) / "logs").mkdir()
+        self.assertTrue(customgames.add("SPT", command=str(sh)))
+        self.assertEqual(customgames.log_dir("SPT"), str(Path(self._tmp.name) / "logs"))
+
+    def test_no_command_resolves_to_none(self):
+        customgames.add("SPT")
+        self.assertIsNone(customgames.command("SPT"))
+        self.assertIsNone(customgames.command("missing"))
+        self.assertIsNone(customgames.log_dir("SPT"))
+
+    def test_corrupt_file_degrades_to_empty(self):
+        self._file.parent.mkdir(parents=True, exist_ok=True)
+        self._file.write_text("{not json")
+        self.assertEqual(customgames.scan(), [])
+        # and a subsequent add still works (overwrites the garbage)
+        self.assertTrue(customgames.add("SPT"))
+        self.assertEqual(customgames.names(), ["SPT"])
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_displays.py

@@ -0,0 +1,67 @@
+"""Tests for display detection (Mutter D-Bus JSON + xrandr parsers)."""
+
+import unittest
+
+from rigdoctor.core import displays
+
+# Minimal Mutter GetCurrentState (busctl --json) shape: current mode is 60 Hz, panel max 165 Hz.
+_MUTTER_60 = (
+    '{"type":"x","data":[1,[[["DP-1","SAM","LC34G55T","S"],['
+    '["3440x1440@60",3440,1440,60.0,1.0,[1.0],{"is-current":{"type":"b","data":true}}],'
+    '["3440x1440@165",3440,1440,165.0,1.0,[1.0],{"is-preferred":{"type":"b","data":true}}]'
+    '],{}]],[],{}]}'
+)
+_MUTTER_MAX = (
+    '{"type":"x","data":[1,[[["DP-1","SAM","LC34G55T","S"],['
+    '["3440x1440@165",3440,1440,165.0,1.0,[1.0],{"is-current":{"type":"b","data":true}}],'
+    '["3440x1440@60",3440,1440,60.0,1.0,[1.0],{}]'
+    '],{}]],[],{}]}'
+)
+
+_XRANDR_60 = """Screen 0: minimum 8 x 8, current 3440 x 1440, maximum 16384 x 16384
+DP-1 connected primary 3440x1440+0+0 (normal left inverted right x axis y axis) 800mm x 335mm
+   3440x1440     60.00*+  165.00   100.00
+   2560x1440    165.00    60.00
+HDMI-1 disconnected (normal left inverted right x axis y axis)
+"""
+
+
+class MutterParseTests(unittest.TestCase):
+    def test_parses_and_flags_higher_refresh(self):
+        mons = displays._parse_mutter(_MUTTER_60)
+        self.assertEqual(len(mons), 1)
+        m = mons[0]
+        self.assertEqual(m.connector, "DP-1")
+        self.assertEqual(m.name, "Samsung LC34G55T")  # PNP code SAM mapped
+        self.assertEqual((m.width, m.height), (3440, 1440))
+        self.assertEqual(round(m.refresh), 60)
+        self.assertEqual(round(m.max_refresh), 165)
+        self.assertTrue(m.can_go_faster)
+
+    def test_at_max_is_not_flagged(self):
+        m = displays._parse_mutter(_MUTTER_MAX)[0]
+        self.assertEqual(round(m.refresh), 165)
+        self.assertFalse(m.can_go_faster)
+
+    def test_garbage_returns_empty(self):
+        self.assertEqual(displays._parse_mutter("not json"), [])
+        self.assertEqual(displays._parse_mutter("{}"), [])
+
+
+class XrandrParseTests(unittest.TestCase):
+    def test_current_and_max_refresh(self):
+        mons = displays._parse_xrandr(_XRANDR_60)
+        self.assertEqual(len(mons), 1)  # disconnected output ignored
+        m = mons[0]
+        self.assertEqual(m.connector, "DP-1")
+        self.assertEqual((m.width, m.height), (3440, 1440))
+        self.assertEqual(round(m.refresh), 60)
+        self.assertEqual(round(m.max_refresh), 165)
+        self.assertTrue(m.can_go_faster)
+
+    def test_empty_returns_empty(self):
+        self.assertEqual(displays._parse_xrandr(""), [])
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_drives.py

@@ -0,0 +1,99 @@
+"""Tests for drive health parsing & findings (synthetic smartctl JSON)."""
+
+import unittest
+from dataclasses import asdict
+
+from rigdoctor.core import drives
+from rigdoctor.core.health import CRITICAL, INFO, OK, WARNING
+
+_NVME_OK = {
+    "model_name": "Samsung SSD 980 PRO 1TB",
+    "device": {"protocol": "NVMe"},
+    "smart_status": {"passed": True},
+    "temperature": {"current": 41},
+    "power_on_time": {"hours": 1234},
+    "nvme_smart_health_information_log": {
+        "percentage_used": 3, "available_spare": 100, "available_spare_threshold": 10,
+        "media_errors": 0, "data_units_written": 200_000_000,  # ~102 TB
+    },
+}
+
+_NVME_WORN = {
+    "model_name": "Worn NVMe",
+    "device": {"protocol": "NVMe"},
+    "smart_status": {"passed": True},
+    "nvme_smart_health_information_log": {"percentage_used": 96, "available_spare": 100,
+                                          "available_spare_threshold": 10},
+}
+
+_SATA_FAILING = {
+    "model_name": "Samsung SSD 870 QVO 1TB",
+    "device": {"protocol": "ATA"},
+    "smart_status": {"passed": False},
+    "temperature": {"current": 35},
+    "power_on_time": {"hours": 5000},
+    "ata_smart_attributes": {"table": [
+        {"id": 5, "name": "Reallocated_Sector_Ct", "value": 80, "raw": {"value": 12}},
+        {"id": 177, "name": "Wear_Leveling_Count", "value": 88, "raw": {"value": 300}},
+        {"id": 241, "name": "Total_LBAs_Written", "value": 99, "raw": {"value": 2_000_000_000}},
+    ]},
+}
+
+
+class ParseTests(unittest.TestCase):
+    def test_nvme_parse(self):
+        d = drives.parse("/dev/nvme0", _NVME_OK)
+        self.assertEqual(d.kind, "nvme")
+        self.assertTrue(d.passed)
+        self.assertEqual(d.percent_used, 3)
+        self.assertEqual(d.health_pct, 97)          # 100 - percentage_used
+        self.assertEqual(d.power_on_hours, 1234)
+        self.assertEqual(d.temp_c, 41)
+        self.assertAlmostEqual(d.data_written_tb, 102.4, places=1)
+
+    def test_sata_parse(self):
+        d = drives.parse("/dev/sda", _SATA_FAILING)
+        self.assertEqual(d.kind, "sata")
+        self.assertFalse(d.passed)
+        self.assertEqual(d.reallocated, 12)         # raw value
+        self.assertEqual(d.health_pct, 88)          # normalized wear-leveling value
+        self.assertAlmostEqual(d.data_written_tb, 1.02, places=1)
+
+    def test_needs_root_when_no_data(self):
+        d = drives.parse("/dev/sda", None)
+        self.assertTrue(d.needs_root)
+
+    def test_roundtrip_through_dicts(self):
+        d = drives.parse("/dev/nvme0", _NVME_OK)
+        back = drives.from_dicts([asdict(d)])
+        self.assertEqual(len(back), 1)
+        self.assertEqual(back[0].model, d.model)
+        self.assertEqual(back[0].health_pct, d.health_pct)
+
+
+class FindingTests(unittest.TestCase):
+    def test_healthy_nvme_is_ok_with_stats(self):
+        f = drives.to_findings([drives.parse("/dev/nvme0", _NVME_OK)])[0]
+        self.assertEqual(f.severity, OK)
+        self.assertIn("97% life left", f.title)
+        self.assertIn("1,234 h", f.title)
+
+    def test_failing_sata_is_critical(self):
+        f = drives.to_findings([drives.parse("/dev/sda", _SATA_FAILING)])[0]
+        self.assertEqual(f.severity, CRITICAL)
+        self.assertIn("FAILED", f.detail)
+        self.assertIn("reallocated sectors", f.detail)
+
+    def test_worn_nvme_is_warning(self):
+        f = drives.to_findings([drives.parse("/dev/nvme1", _NVME_WORN)])[0]
+        self.assertEqual(f.severity, WARNING)
+        self.assertIn("worn", f.title)
+
+    def test_needs_root_is_info(self):
+        f = drives.to_findings([drives.parse("/dev/sda", None)])[0]
+        self.assertEqual(f.severity, INFO)
+        self.assertIn("needs root", f.title)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_gamelogs.py

@@ -47,6 +47,36 @@ class CollectTests(unittest.TestCase):
             self.assertEqual(gamelogs.collect(), "")
 
 
+class CustomGameLogTests(unittest.TestCase):
+    def test_collect_includes_custom_game_logs(self):
+        tmp = Path(tempfile.mkdtemp())
+        (tmp / "tarkov-latest.log").write_text(">>> Tarkov gone. clean exit")
+        (tmp / "server-latest.log").write_text("SPT server error: mod failed to load")
+        with mock.patch.object(gamelogs, "_proton_logs", return_value=[]), \
+             mock.patch.object(gamelogs, "_steam_console", return_value=None), \
+             mock.patch("rigdoctor.core.customgames.log_dir", return_value=str(tmp)):
+            out = gamelogs.collect(game="SPT")
+        self.assertIn("SPT log", out)
+        self.assertIn("server-latest.log", out)
+        self.assertIn("mod failed to load", out)
+
+    def test_custom_logs_skipped_when_stale(self):
+        tmp = Path(tempfile.mkdtemp())
+        old = tmp / "tarkov-latest.log"
+        old.write_text("an earlier session")
+        old_mtime = time.time() - 3600
+        os.utime(old, (old_mtime, old_mtime))
+        with mock.patch.object(gamelogs, "_proton_logs", return_value=[]), \
+             mock.patch.object(gamelogs, "_steam_console", return_value=None), \
+             mock.patch("rigdoctor.core.customgames.log_dir", return_value=str(tmp)):
+            self.assertEqual(gamelogs.collect(since=time.time() - 60, game="SPT"), "")
+
+    def test_no_game_means_no_custom_logs(self):
+        with mock.patch.object(gamelogs, "_proton_logs", return_value=[]), \
+             mock.patch.object(gamelogs, "_steam_console", return_value=None):
+            self.assertEqual(gamelogs.collect(), "")  # game=None → custom lookup skipped
+
+
 class SinceScopingTests(unittest.TestCase):
     def test_since_filter_keeps_window_only(self):
         text = (

tests/test_health.py

@@ -1,8 +1,28 @@
 """Tests for the M4 health report's log scanner (synthetic input)."""
 
 import unittest
+from pathlib import Path
+from unittest import mock
 
-from rigdoctor.core.health import CRITICAL, WARNING, run_health_checks, scan_journal_text
+from rigdoctor.core import displays, health
+from rigdoctor.core.health import (
+    CRITICAL,
+    INFO,
+    WARNING,
+    check_displays,
+    check_memory_speed,
+    check_nvidia_module,
+    check_pcie_links,
+    run_health_checks,
+    scan_journal_text,
+)
+
+# A real no-Xid freeze: the open-module VA-space storm captured on 2026-05-29.
+_VASPACE_LOG = """\
+NVRM: nvCheckFailedNoLog: Check failed: 0 == (pMapNode->gpuMask & gpuMask) @ gpu_vaspace.c:4547
+NVRM: dmaAllocMapping_GM107: can't update VA space for mapping @vaddr=0x4be00000
+[drm:nv_drm_gem_alloc_nvkms_memory_ioctl [nvidia_drm]] *ERROR* Failed to allocate NVKMS memory for GEM object
+"""
 
 
 class HealthScanTests(unittest.TestCase):
@@ -32,6 +52,28 @@ class HealthScanTests(unittest.TestCase):
     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_vaspace_freeze_detected_without_any_xid(self):
+        findings = scan_journal_text(_VASPACE_LOG)
+        gpu = [f for f in findings if f.category == "GPU"]
+        self.assertEqual(len(gpu), 1)
+        self.assertEqual(gpu[0].severity, WARNING)
+        self.assertIn("VA-space", gpu[0].title)
+        # It must NOT be misreported as an Xid finding (the log has no Xid at all).
+        self.assertNotIn("Xid", gpu[0].title)
+        self.assertIn("open kernel module", gpu[0].detail.lower())
+
+    def test_open_module_finding_when_open_loaded(self):
+        with mock.patch("rigdoctor.core.health._nvidia_module_is_open", return_value=True):
+            findings = check_nvidia_module()
+        self.assertEqual(len(findings), 1)
+        self.assertEqual(findings[0].severity, INFO)
+        self.assertEqual(findings[0].category, "Driver")
+
+    def test_no_module_finding_when_proprietary_or_absent(self):
+        for state in (False, None):
+            with mock.patch("rigdoctor.core.health._nvidia_module_is_open", return_value=state):
+                self.assertEqual(check_nvidia_module(), [])
+
     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()
@@ -42,5 +84,70 @@ class HealthScanTests(unittest.TestCase):
         self.assertEqual(ranks, sorted(ranks))
 
 
+class PcieLinkCheckTests(unittest.TestCase):
+    def _with_link(self, cur_g, cur_w, max_g, max_w):
+        # one fake NVMe controller returning the given link tuple
+        return (mock.patch("rigdoctor.core.inventory.nvme_controllers",
+                           return_value=[("nvme0", Path("/x"))]),
+                mock.patch("rigdoctor.core.inventory.read_link",
+                           return_value=(cur_g, cur_w, max_g, max_w)))
+
+    def test_reduced_width_is_a_warning_about_lane_sharing(self):
+        ctrls, link = self._with_link(4, "2", 4, "4")  # Gen4 x2 but supports x4
+        with ctrls, link:
+            findings = check_pcie_links()
+        self.assertEqual(len(findings), 1)
+        self.assertEqual(findings[0].severity, WARNING)
+        self.assertIn("lane-sharing", findings[0].detail)
+
+    def test_reduced_speed_only_is_info(self):
+        ctrls, link = self._with_link(3, "4", 4, "4")  # Gen3 x4 but supports Gen4
+        with ctrls, link:
+            findings = check_pcie_links()
+        self.assertEqual(len(findings), 1)
+        self.assertEqual(findings[0].severity, INFO)
+
+    def test_full_speed_no_finding(self):
+        ctrls, link = self._with_link(4, "4", 4, "4")
+        with ctrls, link:
+            self.assertEqual(check_pcie_links(), [])
+
+
+class DisplayCheckTests(unittest.TestCase):
+    def test_lower_than_max_refresh_is_flagged(self):
+        mon = displays.Monitor("DP-1", "Samsung LC34G55T", 3440, 1440, 60.0, 165.0)
+        with mock.patch("rigdoctor.core.displays.collect", return_value=[mon]):
+            findings = check_displays()
+        self.assertEqual(len(findings), 1)
+        self.assertEqual(findings[0].severity, INFO)
+        self.assertIn("165", findings[0].title)
+
+    def test_at_max_refresh_no_finding(self):
+        mon = displays.Monitor("DP-1", "Samsung LC34G55T", 3440, 1440, 165.0, 165.0)
+        with mock.patch("rigdoctor.core.displays.collect", return_value=[mon]):
+            self.assertEqual(check_displays(), [])
+
+
+class MemorySpeedCheckTests(unittest.TestCase):
+    def _dmi(self, configured, part):
+        return {"memory": [{"Configured Memory Speed": configured, "Speed": configured,
+                            "Part Number": part}]}
+
+    def test_flags_unapplied_expo(self):
+        dmi = self._dmi("4800 MT/s", "CMK32GX5M2B5600Z36")
+        with mock.patch("rigdoctor.core.elevation.privileged", return_value=None), \
+             mock.patch("rigdoctor.core.inventory._dmidecode", return_value=dmi):
+            findings = check_memory_speed()
+        self.assertEqual(len(findings), 1)
+        self.assertEqual(findings[0].severity, INFO)
+        self.assertIn("5600", findings[0].title)
+
+    def test_no_flag_at_rated(self):
+        dmi = self._dmi("5600 MT/s", "CMK32GX5M2B5600Z36")
+        with mock.patch("rigdoctor.core.elevation.privileged", return_value=None), \
+             mock.patch("rigdoctor.core.inventory._dmidecode", return_value=dmi):
+            self.assertEqual(check_memory_speed(), [])
+
+
 if __name__ == "__main__":
     unittest.main()

tests/test_inventory.py

@@ -1,6 +1,8 @@
 """Tests for the M5 system inventory (render + dict round-trip; collect on real system)."""
 
+import tempfile
 import unittest
+from pathlib import Path
 
 from rigdoctor.core import inventory
 from rigdoctor.core.inventory import Section
@@ -26,5 +28,49 @@ class InventoryTests(unittest.TestCase):
         self.assertIn("- **Model:** Test CPU", md)
 
 
+class PcieLinkTests(unittest.TestCase):
+    def test_gen_mapping(self):
+        self.assertEqual(inventory._gen("16.0 GT/s PCIe"), 4)
+        self.assertEqual(inventory._gen("8.0 GT/s PCIe"), 3)
+        self.assertIsNone(inventory._gen(""))
+
+    def _fake_dev(self, cur_s, cur_w, max_s, max_w) -> Path:
+        d = Path(tempfile.mkdtemp())
+        (d / "current_link_speed").write_text(cur_s)
+        (d / "current_link_width").write_text(cur_w)
+        (d / "max_link_speed").write_text(max_s)
+        (d / "max_link_width").write_text(max_w)
+        return d
+
+    def test_link_at_full_speed(self):
+        dev = self._fake_dev("16.0 GT/s PCIe", "4", "16.0 GT/s PCIe", "4")
+        self.assertEqual(inventory._link_desc(dev), "PCIe Gen4 x4")
+
+    def test_link_downtrained_flags_capability(self):
+        dev = self._fake_dev("8.0 GT/s PCIe", "4", "16.0 GT/s PCIe", "4")
+        self.assertEqual(inventory._link_desc(dev), "PCIe Gen3 x4 (capable of Gen4 x4)")
+
+    def test_non_nvme_has_no_link(self):
+        self.assertEqual(inventory._nvme_link("sda"), "")
+
+
+class MemorySpeedTests(unittest.TestCase):
+    def test_rated_speed_from_part_number(self):
+        self.assertEqual(inventory._rated_from_part("CMK32GX5M2B5600Z36"), 5600)
+        self.assertEqual(inventory._rated_from_part("F5-6000J3038F16G"), 6000)
+        self.assertIsNone(inventory._rated_from_part("NoSpeedHere"))
+
+    def test_detects_unapplied_expo(self):
+        # XMP/EXPO off: dmidecode only sees JEDEC 4800; the 5600 is in the part number.
+        m = {"Configured Memory Speed": "4800 MT/s", "Speed": "4800 MT/s",
+             "Part Number": "CMK32GX5M2B5600Z36"}
+        self.assertEqual(inventory.module_speed(m), (4800, 5600))
+
+    def test_at_rated_speed(self):
+        m = {"Configured Memory Speed": "5600 MT/s", "Speed": "5600 MT/s",
+             "Part Number": "CMK32GX5M2B5600Z36"}
+        self.assertEqual(inventory.module_speed(m), (5600, 5600))
+
+
 if __name__ == "__main__":
     unittest.main()

tests/test_minidump.py

@@ -0,0 +1,163 @@
+"""Tests for the .dmp minidump parser (M14) — builds a synthetic MDMP, no external tools."""
+
+import struct
+import tempfile
+import unittest
+from pathlib import Path
+from unittest import mock
+
+from rigdoctor.core import minidump
+
+
+def _synthetic_dump() -> bytes:
+    """A minimal but valid MDMP: header + SystemInfo + Exception + 2-module ModuleList.
+
+    Layout (absolute file offsets): header@0, directory@32, SystemInfo@68, Exception@96,
+    ModuleList@264, name strings@484. Module0 spans the exception address, so it's faulting.
+    """
+    buf = bytearray(600)
+    struct.pack_into("<4sIIIIIQ", buf, 0, b"MDMP", 0xA793, 3, 32, 0, 1_700_000_000, 0)
+    struct.pack_into("<III", buf, 32, 7, 28, 68)     # SystemInfoStream
+    struct.pack_into("<III", buf, 44, 6, 168, 96)    # ExceptionStream
+    struct.pack_into("<III", buf, 56, 4, 220, 264)   # ModuleListStream
+
+    # SystemInfo: x86-64, 16 CPUs, Windows 10.0.19041 (PlatformId 2 = Win32 NT).
+    struct.pack_into("<HHHBBIIIII", buf, 68, 9, 0, 0, 16, 1, 10, 0, 19041, 2, 0)
+
+    # Exception: access violation (write) at 0x140001234.
+    struct.pack_into("<I", buf, 96, 4321)            # ThreadId
+    struct.pack_into("<I", buf, 96 + 8, 0xC0000005)  # ExceptionCode
+    struct.pack_into("<Q", buf, 96 + 24, 0x140001234)  # ExceptionAddress
+    struct.pack_into("<I", buf, 96 + 32, 2)          # NumberParameters
+    struct.pack_into("<Q", buf, 96 + 40, 1)          # info[0] = write
+    struct.pack_into("<Q", buf, 96 + 48, 0x0)        # info[1] = faulting address
+
+    # ModuleList: 2 modules.
+    struct.pack_into("<I", buf, 264, 2)
+    m0, m1 = 268, 268 + minidump._MODULE_STRIDE
+    struct.pack_into("<Q", buf, m0, 0x140000000)     # base
+    struct.pack_into("<I", buf, m0 + 8, 0x100000)    # size (spans the exception address)
+    struct.pack_into("<I", buf, m0 + 20, 484)        # name RVA
+    struct.pack_into("<Q", buf, m1, 0x180000000)
+    struct.pack_into("<I", buf, m1 + 8, 0x080000)
+    struct.pack_into("<I", buf, m1 + 20, 522)
+
+    name0 = "C:\\Games\\game.exe".encode("utf-16-le")
+    struct.pack_into("<I", buf, 484, len(name0))
+    buf[488:488 + len(name0)] = name0
+    name1 = "nvwgf2umx.dll".encode("utf-16-le")
+    struct.pack_into("<I", buf, 522, len(name1))
+    buf[526:526 + len(name1)] = name1
+    return bytes(buf)
+
+
+class ParseTests(unittest.TestCase):
+    def setUp(self):
+        self._tmp = tempfile.NamedTemporaryFile(suffix=".dmp", delete=False)
+        self._tmp.write(_synthetic_dump())
+        self._tmp.close()
+        self.path = self._tmp.name
+
+    def tearDown(self):
+        Path(self.path).unlink(missing_ok=True)
+
+    def _parse(self):
+        return minidump.parse(self.path, run_stackwalk=False)
+
+    def test_parses_exception_and_faulting_module(self):
+        r = self._parse()
+        self.assertTrue(r.ok, r.error)
+        self.assertEqual(r.exception_code, 0xC0000005)
+        self.assertIn("Access violation", r.crash_reason)
+        self.assertIn("writing 0x0", r.crash_reason)
+        self.assertEqual(r.faulting_module, "game.exe")  # basename, address inside module0
+        self.assertEqual(r.crashing_thread, 4321)
+
+    def test_parses_system_info_and_modules(self):
+        r = self._parse()
+        self.assertEqual(r.os_name, "Windows 10.0.19041")
+        self.assertEqual(r.cpu_arch, "x86-64")
+        self.assertEqual(r.cpu_count, 16)
+        self.assertEqual([m.name for m in r.modules], ["game.exe", "nvwgf2umx.dll"])
+
+    def test_to_text_and_ai_text(self):
+        r = self._parse()
+        text = minidump.to_text(r)
+        self.assertIn("game.exe", text)
+        self.assertIn("nvwgf2umx.dll", text)
+        self.assertIn("Access violation", text)
+        ai_text = minidump.to_ai_text(r)
+        self.assertIn("Proton", ai_text)       # Linux/Proton framing for the model
+        self.assertIn("Crash reason", ai_text)
+
+    def test_to_findings(self):
+        findings = minidump.to_findings(self._parse())
+        self.assertEqual(findings[0].severity, minidump.CRITICAL)
+        self.assertIn("game.exe", findings[0].title)
+
+    def test_run_stackwalk_false_skips_external_tool(self):
+        self.assertEqual(self._parse().stackwalk, "")
+
+
+class RobustnessTests(unittest.TestCase):
+    def test_non_minidump_file(self):
+        with tempfile.NamedTemporaryFile(suffix=".dmp", delete=False) as fh:
+            fh.write(b"not a dump at all")
+            path = fh.name
+        try:
+            r = minidump.parse(path, run_stackwalk=False)
+        finally:
+            Path(path).unlink(missing_ok=True)
+        self.assertFalse(r.ok)
+        self.assertIn("signature", r.error)
+
+    def test_missing_file(self):
+        r = minidump.parse("/nonexistent/does-not-exist.dmp", run_stackwalk=False)
+        self.assertFalse(r.ok)
+        self.assertIn("can't read", r.error)
+
+    def test_stackwalk_absent_returns_empty(self):
+        with mock.patch.object(minidump.shutil, "which", return_value=None):
+            self.assertEqual(minidump.stackwalk("/whatever.dmp"), "")
+
+
+class CliDumpTests(unittest.TestCase):
+    """`rigdoctor ai dump <file>` parses then explains via the configured provider."""
+
+    def _args(self, **over):
+        import argparse
+        base = {"ai_cmd": "dump", "file": ""}
+        base.update(over)
+        return argparse.Namespace(**base)
+
+    def test_dump_parses_and_explains(self):
+        from rigdoctor.core import ai
+
+        with tempfile.NamedTemporaryFile(suffix=".dmp", delete=False) as fh:
+            fh.write(_synthetic_dump())
+            path = fh.name
+        try:
+            with mock.patch.object(ai, "is_configured", return_value=True), \
+                 mock.patch.object(ai, "provider_label", return_value="Claude (test)"), \
+                 mock.patch.object(minidump, "stackwalk", return_value=""), \
+                 mock.patch.object(ai, "explain", return_value=(True, "Likely DXVK.")) as explain:
+                from rigdoctor import cli
+                rc = cli.cmd_ai(self._args(file=path))
+        finally:
+            Path(path).unlink(missing_ok=True)
+        self.assertEqual(rc, 0)
+        sent = explain.call_args[0][0]
+        self.assertIn("Proton", sent)         # the Linux/Proton framing reached the model
+        self.assertIn("game.exe", sent)
+
+    def test_dump_bad_file_returns_error(self):
+        from rigdoctor.core import ai
+
+        with mock.patch.object(ai, "is_configured", return_value=True):
+            from rigdoctor import cli
+            rc = cli.cmd_ai(self._args(file="/nope/missing.dmp"))
+        self.assertEqual(rc, 1)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_stress.py

@@ -0,0 +1,77 @@
+"""Tests for the GPU stress + thermal-monitor analysis (synthetic ticks, no real GPU)."""
+
+import unittest
+
+from rigdoctor.core import stress
+from rigdoctor.core.health import CRITICAL, OK, WARNING
+
+
+def _tick(temp=None, power=None, throttle=(), capped=False, lost=False, dt=1.0, **extra):
+    values = {}
+    if temp is not None:
+        values["gpu.temp"] = temp
+    if power is not None:
+        values["gpu.power"] = power
+    values.update(extra)
+    return stress._Tick(dt=dt, values=values, throttle=list(throttle), power_capped=capped, lost=lost)
+
+
+class SummarizeTests(unittest.TestCase):
+    def test_stable_run_is_ok(self):
+        ticks = [_tick(temp=t, power=200, **{"gpu.power_limit": 280}) for t in (60, 65, 70, 72)]
+        r = stress.summarize(ticks, load="monitor-only", interval=1.0, faults=[])
+        self.assertEqual(r.severity, OK)
+        self.assertEqual(r.peak_temp, 72)
+        self.assertEqual(r.max_power, 200)
+        self.assertEqual(r.power_limit, 280)
+        self.assertFalse(r.throttled)
+        self.assertIn("Stable", r.verdict)
+
+    def test_dwell_time_above_thresholds(self):
+        # 3 ticks of 2s each at 82/86/92 °C → ≥80 for all 6s, ≥85 for 4s, ≥90 for 2s.
+        ticks = [_tick(temp=82, dt=2.0), _tick(temp=86, dt=2.0), _tick(temp=92, dt=2.0)]
+        r = stress.summarize(ticks, load="x", interval=2.0, faults=[])
+        self.assertEqual(r.time_above[80], 6.0)
+        self.assertEqual(r.time_above[85], 4.0)
+        self.assertEqual(r.time_above[90], 2.0)
+        self.assertNotIn(95, r.time_above)  # never reached → omitted
+
+    def test_throttling_is_a_warning(self):
+        ticks = [_tick(temp=88, throttle=["HW thermal slowdown"])]
+        r = stress.summarize(ticks, load="x", interval=1.0, faults=[])
+        self.assertEqual(r.severity, WARNING)
+        self.assertTrue(r.throttled)
+        self.assertIn("HW thermal slowdown", r.throttle_reasons)
+
+    def test_high_temp_without_throttle_is_a_warning(self):
+        r = stress.summarize([_tick(temp=93)], load="x", interval=1.0, faults=[])
+        self.assertEqual(r.severity, WARNING)
+        self.assertIn("hot", r.verdict.lower())
+
+    def test_gpu_lost_is_critical(self):
+        ticks = [_tick(temp=70), _tick(lost=True)]
+        r = stress.summarize(ticks, load="x", interval=1.0, faults=[])
+        self.assertEqual(r.severity, CRITICAL)
+        self.assertTrue(r.gpu_lost)
+
+    def test_journal_fault_is_critical(self):
+        r = stress.summarize([_tick(temp=70)], load="x", interval=1.0,
+                             faults=["NVIDIA Xid 79 ×1"])
+        self.assertEqual(r.severity, CRITICAL)
+        self.assertIn("Xid 79", r.verdict)
+
+    def test_no_telemetry_is_info(self):
+        r = stress.summarize([_tick()], load="monitor-only", interval=1.0, faults=[])
+        self.assertEqual(r.severity, "info")
+        self.assertIsNone(r.peak_temp)
+
+
+class ThrottleDecodeTests(unittest.TestCase):
+    def test_throttle_bits_map_to_reasons(self):
+        # the constants used by _throttle_state decode the NVML active-reasons bitmask
+        self.assertIn("HW thermal slowdown", stress._THROTTLE_BITS.values())
+        self.assertIn("SW thermal slowdown", stress._THROTTLE_BITS.values())
+
+
+if __name__ == "__main__":
+    unittest.main()