Verification

Use the lowest verification level that proves the requested result:

Level	Required evidence
L0	Static checks such as the focused verification script, npx tsc --noEmit, tests, and build.
L1	A real Agent run against the editor at localhost:5199, followed by structural and rendered evidence.
L2	The packaged desktop app completing the user scenario, including human visual review where automation is insufficient.

Runtime behavior changes require L0 + L1. Release and desktop-only changes also require L2 when the packaged app is the behavior under test.

Prefer two signals:

1. read_project for structure: assets, tracks, items, frame placement, timeline duration.
2. A visual capture path for rendered evidence at exact frames.

Use view_timeline_frames for composed timeline proof. This verifies the edited OpenChatCut timeline: trims, layers, captions, effects, markers, placeholders, crops, transitions, and layout.

For raw source-asset frame inspection, choose the cheapest path based on where the bytes live:

• The agent in this build has no local filesystem access; all source bytes live in the project media store (/media/uploads/). Use view_asset_frames with the project asset id, the server takes an ffmpeg contact-sheet fast path automatically, so it is already the cheapest source-frame route.
• view_timeline_frames renders the composed timeline (the editor-truth check); view_asset_frames samples raw source frames. Pick by what you are verifying.
• There is no separate get_contact_sheet tool in this build, the contact sheet is what view_asset_frames / view_timeline_frames already return.

Use local/remote source-frame artifacts only for source understanding, moment selection, and rough trim decisions, not as edited output or timeline proof.