Core Idea

Use this skill as a music-video creative workspace. The app is the human editing surface; the skill is the creative producer: it reasons, drafts, validates, exports, and fulfills the AI-generation requests the app can only queue. The app reads and writes a Busabase workspace — one Folder, four Bases (project/settings/cast/shots) — plus Busabase Drive Assets for every uploaded or generated MP3/image/video.

An MV here is pure picture — no voiceover, no dialogue, no on-screen lyrics. The job is simple: take an existing MP3 and give it visuals. The final video is the storyboard shots played in order over the song. (For voiced/dialogue drama, use kelly-drama instead — that is its job.)

The app has exactly four areas: 概括 (Concept), Song, 角色 (Cast), 分镜 (Storyboard). Keep it that simple — don't reintroduce song sections, timeline tiling, or large per-shot production sheets.

Default to the AirApp for ongoing creative work — give the user the clickable AirApp URL, or run pnpm --dir content/kelly-mv-app dev for a local preview. Use chat-only mode only when the user explicitly asks for "chat only", "no UI", "纯聊天", or similar.

Default Flow

Open the AirApp (or pnpm --dir content/kelly-mv-app dev for local preview, which asks you to connect Busabase and select a Space — never an API key).
On first run the workspace is empty; provision it from the app's setup screen, then seed the bundled starter (a 静夜思 sample MV) with node scripts/create_sample_project.mjs --apply, or start from scratch.
Use the app, following the sidebar 下一步 (next step):
- 概括 (Concept): one-line summary of what the MV is and its tonality, a one-line visual look, and aspect ratio. That's it.
- Song: upload an MP3. Duration is read automatically. Optional title/artist. Nothing else.
- 角色 (Cast): the people on screen. Stable id, role, three-view visual notes, wardrobe, anchors, forbidden drift, and a character reference card image. Generate reference cards before storyboard work when consistency matters. No voice profiles (pure-visual MV). Same model as kelly-drama.
- 分镜 (Storyboard): an ordered list of shots. Each shot has a 画面描述 (scene description), on-screen characters, a duration, and an image + a video. Image and video can each be AI-generated (image-to-image from the character cards; draft video via local LTX) or uploaded by the user.
Clicking a "Generate" button in the app only writes a request onto the character/shot record (reference_card_status / image_status / video_status = requested) — the browser cannot hold the image-API key or spawn the local LTX process. After the user asks, fulfill pending requests with node scripts/execute_generation_requests.mjs --apply (dry run without --apply).
After edits, run node scripts/validate_shot_readiness.mjs (each shot has a title, description, and sane duration; warns on cast missing reference cards) before generating.
Export a readable concept + shotlist with node scripts/export_story_bible.mjs for handoff.

Creative Operating Rules

Pure visual. Never add dialogue audio, narration TTS, or burned-in subtitles/lyrics. The only audio is the song itself.
Keep it simple. The shot is just a scene description + characters + duration + image + video. Do not add camera-spec sheets, song-section taxonomies, lyric timelines, or strict timeline-coverage rules.
Pace to the music. Cut shot lengths to the song — quick moments run short (4–6s), establishing/hero/montage runs longer (8–12s). A single AI-generated shot must be 4, 5, 6, 8, 10, or 12 seconds and never exceed 12s. (Uploaded clips can be any length.)
Two ways to fill a shot. Each shot's image and video can be generated or uploaded — both append as non-destructive candidates and the user picks the active one. Respect what the user wants; don't overwrite an uploaded asset by regenerating.
Character consistency via real image-to-image. Storyboard image generation feeds the existing character reference-card images to the image /images/edits endpoint as actual input pixels, not just text. If a character lacks a generated reference card, that shot falls back to text-to-image and the likeness drifts — generate the card first.
Generate in dependency order: song uploaded → concept written → cast reference cards → storyboard images → draft shot videos. The shot's description is the image prompt; an optional negative_prompt and video_prompt refine generation.
Photoreal MV look (when realism is the target): request cinematic music-video stills, real lensing, filmic grain; forbid on-screen lyrics/captions/watermarks/UI, readable fake text, plastic skin, and malformed hands.

Song Generation (future capability)

Selecting/importing an existing song is the supported path today. Creating the song itself — including singing in the user's cloned voice — is wired as a documented stub: scripts/generate_song_draft.mjs spawns scripts/gen_song.py, mirroring the local-draft / cloud-prod split used for video. gen_song.py stays Python deliberately (the local backends worth recommending are Python-ecosystem ML models with no Node equivalent); generate_song_draft.mjs is the trusted wrapper that uploads whatever it produces to Busabase.

Recommended local backends (Apple Silicon, no cloud):

SongGeneration v2 (Tencent) — native MLX weights mlx-community/SongGeneration-v2-large. Best fit for "本地 MLX 最好"; same family path as the local TTS/audio stack. Primary recommendation.
ACE-Step 1.5 — strongest local model, runs on Mac, <4GB, full vocals + instruments, supports audio-prompt timbre cloning and lyric editing → the path for "用我 clone 的声音创歌" (pass a reference clip as the timbre prompt).
YuE / DiffRhythm — full-length song-from-lyrics alternates; heavier.

Caveat: cloning a singing voice needs a singing reference clip; a spoken sample clones timbre but not vocal performance well. To enable generation, install a backend into a local venv, implement the inference call in scripts/gen_song.py, then run scripts/generate_song_draft.mjs --apply.

Busabase Resources

One Folder (kelly-mv), four Bases, declared in content/kelly-mv-app/app/js/config.js and the generated template sidecars under content/:

project: single-row MV project meta — song title/artist/asset-id/duration/source and the concept (treatment_summary/treatment_look/treatment_aspect_ratio).
settings: one row (record-id: "config") with the image-generation backend (base URL/model/size — the API key itself is an env var, never stored) and the song/video generation backend names.
cast: on-screen characters — visual notes, wardrobe, anchors/forbidden-drift (JSON arrays), and the reference-card's status/prompt/asset id.
shots: ordered storyboard shots (position field carries the order) — description/negative-prompt/video-prompt/duration/on-screen characters (JSON array of cast ids), and the image/video asset id + status + JSON-encoded candidate list.

Binary media (uploaded MP3, character reference images, shot images/videos) are Busabase Drive Assets, not Base fields — uploaded from the browser via busabase-sdk's real assets client (createUploadUrl → PUT bytes → confirm), with only the returned asset id stored on the owning record. See references/ui-schema.md for the full field <-> asset mapping and a known limitation of the standalone OSS CLI's asset-upload route.

Resources provision lazily through an idempotent Busabase ChangeRequest the first time the app runs in a Space. A soft-delete deleted text field ("true"/"false") backs the app's Delete buttons on cast/shots — there is no destructive record delete in the write surface.

When To Read References

Read references/mv-workflow.md when designing or improving an MV concept, cast library, shot breakdown, or image/video prompt workflow.
Read references/ui-schema.md when editing the app, generating/validating project data, or working with the Busabase field shapes or Drive Assets.

Useful Commands

pnpm --dir skills/kelly-mv/content/kelly-mv-app dev
node skills/kelly-mv/scripts/create_sample_project.mjs --apply
node skills/kelly-mv/scripts/validate_shot_readiness.mjs
node skills/kelly-mv/scripts/export_story_bible.mjs
node skills/kelly-mv/scripts/execute_generation_requests.mjs --apply
node skills/kelly-mv/scripts/generate_song_draft.mjs --apply

Run validate_shot_readiness.mjs (optionally --strict) before an image/video generation pass. Every trusted script here connects with its own credentials (BUSABASE_BASE_URL / BUSABASE_API_KEY / BUSABASE_SPACE_ID), never the AirApp's ambient session, and defaults to a dry run wherever it writes or generates.

Execution reports

Re-read the active Busabase workspace immediately before fulfilling any pending generation request. scripts/execute_generation_requests.mjs records each concrete operation, target, status, and error directly on the owning cast/shots record (*_status = generated/blocked) — there is no separate execution-report file.

kelly-mv

Kelly MV

App UI Screenshots