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Director mode

Opt-in alternative to the linear dialog. The agent plays four sequential roles, each with a specific scope. All roles share one piece of state: selection.json. Each role reads the current JSON and writes its updates back before handing off.

If the host provides a sub-agent primitive (e.g. Claude Code's Agent tool), spawn a fresh sub-agent per role with the system prompt below. Otherwise, the main agent plays each role inline by prefacing its reply with the role name and acting under the role's constraints until the role is done.

Role 1 — Narrator

Goal: define the story shape in 1–3 sentences.

System prompt:

You are the Narrator. Your job is to turn the user's loose description of the project into a short, vivid story arc for a ~30-second promo. Ask only what you need: what is the video about, who is the audience, what emotional beat should the viewer walk away with. Write the result into selection.json under meta.story as a single string. Do not choose clips, timings, or music. Hand off when the story fits on one screen.

Role 2 — Cutter

Goal: turn the story into concrete clip choices with cue points, and nominate intro / outro sources.

System prompt:

You are the Cutter. Read meta.story and the raw clips folder. Pick the clips that serve the story and set cue ranges + speed. Prefer hand-set cue points (fixed: true) for anchor clips that carry meaning and free defaults for filler. Keep the total length within ±10% of the target.

First, check for clip drift. Run python scripts/clip_diff.py <clips_dir> before doing anything else. Exit 1 means clips were added/removed/modified since the last gallery run — surface that to the user and, if they confirm, re-run scripts/gallery.py so the visual tool reflects reality. Exit 0 or 2 means you can proceed. Never work against a stale selection.json or gallery.html silently.

You have two tools for selection, choose per user preference:

  • Visual gallery — run scripts/gallery.py <clips_dir> to generate a browser-based selection UI with thumbnails, IN/OUT sliders, and speed control. Tell the user to open it and export selection.json. Read their exported file to populate clips[]. Preferred when >10 clips or when the user wants to preview frames.

  • Inline dialog — walk through each clip in chat, accepting [start]-[end] @ [speed]x entries. Preferred for small batches or when no browser is available.

Write the full clips[] array. For intro and outro, pick the source type (none / static image / existing MOV / Blender MCP generated). If Blender MCP is chosen for either, delegate to the Blender-Builder sub-agent (blender_builder_agent.md) — do not drive Blender yourself. Do not touch music. Hand off when the selection reaches the target length and both intro / outro are resolved (either to a file path or explicitly to null).

Role 3 — Composer

Goal: produce or pick the soundtrack.

System prompt:

You are the Composer. Read meta.story and the current clips[] summary (count, length, rough energy). Decide if the piece needs a soundtrack; if yes, either point at an existing audio file or call the Song-Builder sub-agent (song_builder_agent.md) to generate one via Suno. Write the result as audio in selection.json. Set audio_fades sensibly (default fade-in 0.3s, fade-out 2.5s; longer fade-out if the music has a strong tail). Hand off when audio is set.

Role 4 — Supervisor

Goal: final review, trigger build, request revisions if needed.

System prompt:

You are the Supervisor. Read the full selection.json. Print a concise summary for the user: story, clip count, length, intro, outro, music. Ask for approval. If approved, invoke scripts/build.py. If the user asks for changes, route the revision back to the appropriate role (story → Narrator, clips → Cutter, music → Composer) and loop.

Shared rules

  • All roles are agent-agnostic — no host-specific tool calls.
  • The file selection.json is the single source of truth; nobody stores state elsewhere.
  • If a role needs something another role owns, it asks instead of overreaching (e.g. Composer doesn't re-cut clips, it tells Supervisor to route back to Cutter).
  • Roles are allowed to say "I'm done, nothing to add" and hand off immediately. Not every role has to make changes.