Document real 100-second Steam clip export (#154)

Co-authored-by: SAPHID <saphid@users.noreply.github.com>

docs/evidence/clip-long-2026-10-24.json

@@ -0,0 +1,29 @@
+{
+  "date_utc": "2026-10-24",
+  "version": "v0.4.17",
+  "steam_os_version": "0.5.6",
+  "steam_os_build": "20261015.6141207",
+  "result": "PASS: the real Steam-saved clip exported beyond 60 seconds",
+  "method": "Steam manual recording of a reserved test title, then Frame Control's production frame_clips.export_clip path; no packaged GUI button click",
+  "source": {
+    "kind": "saved Steam clip",
+    "duration_seconds": 100.801,
+    "chunks": 68,
+    "gaps": 0
+  },
+  "export": {
+    "format": "MP4",
+    "bytes": 1377849,
+    "sha256": "82ef31f65e6933d122bc326d664beb2eb2e3ba6969f26c0032552e80fbe8d823",
+    "duration_seconds_ffprobe": 100.833335,
+    "video": "H.264, 1920x1080, 6049 frames",
+    "audio": "AAC, 48000 Hz, stereo",
+    "full_ffmpeg_decode": "passed without errors"
+  },
+  "cleanup": "Restored Steam recording mode to its prior off setting; stopped and removed only the reserved title and its processes; no recording or running Steam apps remained; Game Mode active, battery 100%, shared test lock released",
+  "limits": [
+    "This exercised the production export code path, not a packaged GUI Export click.",
+    "Visible gameplay quality, perceptual audio/video sync, trims and longer recordings were not checked.",
+    "The newly saved Steam source clip was retained; no user recording was deleted."
+  ]
+}

docs/recording.md

@@ -170,14 +170,26 @@ The temporary server stopped, the shared device lock was released, and the
 headset remained in Game Mode at 99% battery. See
 [`docs/evidence/clip-gui-export-2026-10-24.json`](evidence/clip-gui-export-2026-10-24.json)
 for the narrow proof. This did not exercise the packaged desktop installer.
+
+On 2026-10-24, the exact v0.4.17 tag exported a second real Steam-saved clip
+through `frame_clips.export_clip`, the same production path used by **Export**.
+Steam listed the clip at **100.801 seconds**, with 68 chunks and no gaps. The
+copied MP4 was **100.833 seconds** by `ffprobe` and decoded completely with
+`ffmpeg`; it was not cut at 60 seconds. The test restored Steam's recording
+mode, removed its reserved title and processes, and left Game Mode active at
+100% battery. See [the long-clip evidence](evidence/clip-long-2026-10-24.json).
+This did not click **Export** in the packaged desktop app or verify visible
+gameplay quality or perceptual audio/video sync.
+
 Remaining checks include:
 
 - Perceptual audio/video sync and audible content. Frame Control's separate
   **Record** path stamps camera and audio inputs with the wall clock because
   they otherwise count from different clocks.
-- Long saved clips, trims starting partway through a Steam recording, and the
-  packaged desktop app's **Export** button. One real saved clip's directory
-  layout was checked; the parser remains deliberately loose for other layouts.
+- Clips longer than the 100-second test, trims starting partway through a Steam
+  recording, and the packaged desktop app's **Export** button. Two real saved
+  clips' directory layouts were checked; the parser remains deliberately loose
+  for other layouts.
 - How much x264 at 1080p30 costs the Frame while a game is running.
 - Automatic copying: that 30 seconds without a write is a safe sign Steam has
   finished saving a clip, and how a once-a-minute listing feels on the Frame.