# Editing notes: cursor-recenter python-file-v2 Claude CLI native preview

Collection was already complete. This edit reuses `recording.mp4`. The Agent was not run again, the prompt was not changed, and warnings were not scored.

Skill files read: `skills/arena-edit-recording/SKILL.md`, the presentation section of `docs/dsh-batch.md`, and `docs/report-contract.md`.

Inspection used ffprobe decoded timestamps, a scaled RGB red-pixel scan (R>200, G<70, B<70) only to narrow the search, and ffmpeg JPEG stills with `-ss` after `-i`. pytesseract was not used.

This trial's public reply is **Failed / stopped**. The saved script raised `OSError: [WinError 0]` during the edge tour. The visible target effect still occurred: the red pointer marker and center bullseye moved through the declared edge tour on attempt 1. This edit does not invent a successful lock or restore.

```mermaid
flowchart LR
  O[Opening 5 s: paste and Enter] --> E[Effect 10 s: red marker tour]
  E --> R[Response 5 s: failed public reply]
```

## Source

- Recording: `recording.mp4`
- Container duration: 182.500 seconds
- Picture: 3840x2160
- 1387 decoded frames. `best_effort_timestamp_time` runs from 0.000 through 182.375
- 1321 intervals are 0.125 seconds. 58 intervals are 0.250 seconds. Six intervals are 0.375 seconds: 53.500→53.875, 54.125→54.500, 54.750→55.125, 55.875→56.250, 56.500→56.875, 151.250→151.625. One interval is 0.500 seconds: 55.125→55.625
- SHA-256: `b8c29d657c45d02b68c5d92b2040e9651ca9e1f3a5007a17f8de5af704045730`
- Maximized Claude CLI in Windows Terminal. Full-frame desktop capture 3840x2160
- `confirmations.json` is `[]`. Approval policy is auto. There is no numbered approval
- `claude-transcript-observation.json`: `powershellUsed` true, `bashUsed` false, `gitBashStartupFailure` false
- Public reply: Failed / stopped. Two PowerShell runs of `python .\cursor-recenter.py`, both exit 1, in-script `[WinError 0]` during the tour

Native events and the transcript were used only to narrow the search. Offsets below are decoded source frames.

## Observed onset

The target effect is the visible red pointer marker (160 px, COLORREF `0x0000FF`) and the center bullseye (360 px), with the pointer on the marker as it tours the primary-screen edges. A tool-success line is not this effect. Git Bash `NtCreateDirectoryObject` / `STATUS_ACCESS_DENIED` / `0xC0000022` is not this effect. This session did not use Bash.

The first visible red marker and bullseye frame is source **46.625 s**. The marker is at the top-left inset. The pointer sits on the marker. The bullseye is at the primary center. The command is PowerShell-route `$ python .\cursor-recenter.py`.

Adjacent decoded frames (`-ss` after `-i`):

- **45.625 s**: `$ python .\cursor-recenter.py` running. `Gusting… (30s)`. No red. No approval panel
- **46.250 s**: still no red. Command shows `(7s)`. `Gusting… (31s)`
- **46.375 s**: last clean frame before onset. Pointer near the footer. No red
- **46.625 s**: first red marker (top-left inset) and center bullseye. This is the onset. 46.500 is missing on the 0.125 s grid
- **47.000 s**: marker has moved right along the top edge
- **48.125 s**: marker further along the top edge
- **50.000 s**: marker on the right edge
- **52.000 s** and **52.500 s**: marker on the bottom edge. 52.500 is the last red frame of attempt 1
- **52.750 s**: overlays gone. Command log shows `(6s · 334 lines)`
- **53.250 s**: command finished. `Gusting… (38s · thinking)`

Attempt 1 PowerShell start in the transcript is 15:32:30Z (about source 40 s). Attempt 2 is 15:32:54Z (about source 64 s) and is a later repeat, not the first onset.

A 320x180 red scan of constant-8 fps frames first hit near 46.6 s. That scan does not replace the 46.625 decoded onset.

## Selection

No crop. Full frames. Original speed.

Exact `startSeconds`:

| Stage | Start (s) | Duration (s) | Source range (s) | Basis |
| --- | ---: | ---: | --- | --- |
| opening | 12.000 | 5 | 12.000–17.000 | Unsent paste, then Enter, then short `Flowing…` |
| effect | 45.625 | 10 | 45.625–55.625 | 1.000 s before first red, then the attempt-1 edge tour |
| response | 150.625 | 5 | 150.625–155.625 | First decoded frame of the completed public reply |

Opening. **9.500 s** is the empty Claude composer. **9.625 s** is the first `[Pasted text #1 +22 lines]` frame. That paste stays through **15.250 s**. **15.375 s** is the first submitted frame: composer clear, later paragraphs of the request visible, footer `Flowing…`. Paste onset to Enter is 5.750 s, so one 5 s window cannot include both the first paste frame and the Enter frame. This window starts at **12.000 s**, while the paste is still unsent, and includes Enter at 15.375 s plus `Flowing…` through 17.000 s. The workspace trust dialog is visible at 0.000 s through about 7 s, and is gone by 8.000 s. It is not in this window. The `python .\cursor-recenter.py` line sits above the post-submit view. Full text is in `prompt.txt`.

Effect. Recipe start is 45.625, one second before 46.625. **45.625** through **46.375** still have `$ python .\cursor-recenter.py` running and no approval dialog. The 1.000 s lead-in was not shortened. Onset at 46.625 is inside the segment (output 6.000). Later frames in this 10 s window show the marker on the top, right, and bottom edges. Last red is 52.500 (output 11.875). From 52.750 through 55.625 the overlays are gone and the CLI is thinking after attempt 1.

Response. At **150.500 s** the footer is still `Gusting… (2m 15s)` with `esc to interrupt`. The visible text is tool narration (`Remove-Item` of `run2.log`), not the formatted public reply. At **150.625 s** the turn is complete: `Sautéed for 2m 15s · done 23:34`, an empty composer, and `auto mode on` without the interrupt hint. Visible text matches `agent-output.txt` and `final-screen.png` (Failed / stopped, two attempts, `[WinError 0]`). That completed view holds through 155.625 s and through the raw recording end at 182.375 s.

## Omitted effect and closure

The 10 s effect window includes the 1 s clean lead-in, the onset, the attempt-1 edge tour (top, right, bottom), and about 2.875 s after the overlays close. It does not include:

- Remaining left-edge travel, if any, after 52.500. The script failed near the start of the left edge (`SetCursorPos(180, 1935)`)
- The 17 s center-lock and corner-release phase. That phase did not run
- Attempt 2 red overlays, about source 69 s through 83 s. That is a later repeat of the same tour, not the first onset
- Window destroy after attempt 2, later tool narration, and the completed reply, which belong to the response stage

No lead-in was shortened. No numbered approval panel is in the selected ranges. `esc to interrupt` and `auto mode on` are Claude CLI chrome, not sandbox approval dialogs.

## Timing uncertainty

The usual capture interval is 0.125 s. The red marker can have painted between 46.375 and 46.625 (a 0.250 s gap; 46.500 is missing). Paste can have appeared between 9.500 and 9.625. Enter can have occurred between 15.250 and 15.375. The last red frame can have ended between 52.500 and 52.750. The `Sautéed for` footer can have appeared between 150.500 and 150.625.

Inside the selected windows: 14.500→14.750 sits during unsent paste; 14.750 is still paste, and Enter is at 15.375. 46.375→46.625 is the onset gap; the first decoded red frame is 46.625 and is inside the effect segment. 52.500→52.750 contains overlay teardown after the tour. 55.125→55.625 (0.500 s) is the exclusive end of the effect window, after the overlays are already gone. 150.875→151.125 and 151.250→151.625 sit after the completed footer is already visible. None of those gaps hides paste, Enter, red onset, or the completed reply. Output stage boundaries fall on 5.000 s and 15.000 s after 8 fps wall-clock normalization.

## Approval stills

`confirmations.json` is empty. There is no numbered approval and no approval screenshot to return.

`startup-1.png` and `startup-confirmations.json` record the workspace trust dialog before the prompt. That dialog is visible at source 0.000 s and is outside this edit. It is not a numbered trial approval.

## Checks

- Export command: from the repository root, `PYTHONPATH=src`, `.\.venv\Scripts\python.exe -m arena dsh-preview --run-dir <run> --moments native-preview-moments.json --ffmpeg <ffmpeg> --output-name native-preview.mp4`. No crop. Not `--full-timeline`
- Stills, 1920x1080, `-ss` after `-i`: `native-effect.png` at source 46.625 (first red marker and bullseye, `$ python .\cursor-recenter.py`, `Gusting… (31s)`); `native-final.png` at source 150.625 (first completed reply)
- Output duration: 20.000 s. Picture: 1920x1080. Decoded frames: 160. Timestamps: 0.000 through 19.875, every 0.125 s, with no gaps
- Stage boundaries in the output are 5.000 and 15.000
- Output 0.000 shows `[Pasted text #1 +22 lines]`. Output 3.375 is the Enter frame (`Flowing…`, expanded request). Output 4.875 still shows that submitted command
- Output 5.000 and 5.875 are `$ python .\cursor-recenter.py` running, no red, no panel. **Output 6.000 first red marker and bullseye**. Output 10.000: marker on the right edge, bullseye centered. Output 11.875: last red, marker on the bottom edge. Output 14.875: overlays gone, `Gusting… (40s · thinking)`
- Output 15.000 and 19.875 show the completed public reply (`Sautéed for 2m 15s · done 23:34`, empty composer, `auto mode on`, Failed / stopped)
- No sandbox approval panel appears in the inspected source ranges or in the output
- Source SHA-256 after export matches the hash above. `recording.mp4` was not replaced
- Provenance source path is `recording.mp4`. Output SHA-256: `d5c8707d255ed9ec7bd164fa16acdaabc4c16b401dc8de2224d77272dc298416`
- No full-timeline preview. The red marker and bullseye are visible on screen, so a 20-second compressed timeline was not exported

## Missing evidence

There is no numbered approval capture. `confirmations.json` is empty, which matches the recording.

The paste chip does not show the command text. After Enter, the visible thread shows the later paragraphs of the request. The `python .\cursor-recenter.py` line sits above this view. Full request and reply text are in `prompt.txt` and `agent-output.txt`.