[ColinGPT9]

Step 4 of the editor suite, stacked on #231. Covers the creator description from #174 and the music and sound library from #155.

What's new

• About this creator. A box on the Creators page where you describe a creator in your own words (up to 600 characters). When it is filled in, the AI reads it as background when it picks clips and writes titles, descriptions and hashtags. It adds no score of its own.
• Free music. The clip editor's Effects tab has a Free music button: 8 tracks in four moods, each with a preview. Picking one puts it under the clip, with the same Vol and Duck under voice controls as your own file.
• A bundled sound library. 8 music tracks and 56 sound effects, 9.2 MB, all CC0 1.0 (free to use, also in monetised videos). The sound effects ship now; placing them on a clip comes with the new editor.
• Remote rendering. A clip with a free track can render on a render PC, because that PC has the same file.

What stays the same

• With the box empty, every prompt the app sends is byte-identical to before. A test records the prompts and compares them.
• A clip with your own music file, or with no music, renders exactly as before. No existing snapshot changed and the golden renders are identical.

How it works

• creators.description is a new column; POST /creators/{id}/description saves it. Control characters are removed and curly brackets cannot fill a prompt template.
• assets/library/manifest.json lists every file with its sha256, licence, author and source. video/audio_library.py returns a file only when its sha256 matches.
• GET /assets/library and GET /assets/library/{file} serve only files named in the manifest.
• edit.music may be {"library": "<id>", "volume", "duck"}. An unknown id or a damaged file renders the clip without music and writes a plain line in the job log.
• The remote-render protocol number goes from 2 to 3, so a render PC on an older app is asked to update.

Checks

• QC and an adversarial review of the licences (each source page read), the prompts, the audio in rendered clips, remote rendering and the routes: one serious finding in the first round, fixed; none afterwards.
• Black-box scenarios: five of six passed. The sixth (free music) works end to end, but see the first known limit.
• Performance: nothing more than 2.8% slower.
• UX and accessibility: passed after one fix round.
• The last small findings were fixed by hand and were not re-reviewed by an independent agent.

Known limits

• On a clip with talking all the way through, a free track is hard to hear at the default volume (40, with Duck under voice on). Raising Vol or turning ducking off makes it audible.
• With the queue stopped, Apply shows "Applying edits" and does not say it is waiting for the queue to start.
• Escape inside the open music list closes the whole editor.
• A creator note is text a person wrote, so the AI reads whatever it says; it is labelled as background, not instructions.

Not for merging yet: waiting for the owner's click-through.

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated
clips-kitty-web	Ready	Preview	Nov 12, 2026 7:20pm UTC

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