Image Compose Agent Skill

CLI shape

Standard tier:

node "$PAI_REPO_ROOT/server/cli/generate_image.js" --prompt "..." [--aspect-ratio 16:9] [--image-size 2K] [--label "..."] [--subtype <character|location|edit|reference|split|storyboard>] [--name "..."] [--role "..."] [--description "..."] [--source-node-id <id>] [--ref-source-id <id> ...]

Pro tier for storyboard mosaics and video-bound character sheets:

node "$PAI_REPO_ROOT/server/cli/generate_image_pro.js" --prompt "..." --size 2560x1440 [--label "..."] [--subtype <character|location|edit|reference|split|storyboard>] [--name "..."] [--role "..."] [--description "..."] [--source-node-id <id>] [--ref-source-id <id> ...]

Pro accepts --size only; no --aspect-ratio / --image-size. Common sizes: 1024x1024, 1280x720, 720x1280, 1920x1920, 2560x1440, 1440x2560, 3840x2160, 2160x3840.

--label defaults to the truncated prompt (≤30 chars) if omitted; pass an explicit one when you have a better caption.

Use @Image1, @Image2, … in --ref-source-id order. The CLI emits one derived edge per ref.

Mirror external URLs first with mirror_url.js --url <URL>, then pass the returned node_id via --ref-source-id.

If a note authored the image, pass --source-node-id <note_id>.

Do not attempt to invent images via ASCII art or markdown embedding — call the CLI.

First-use image mode

For the ask-once flow and per-mode prices, see the project PROJECT_AGENT.md § "First-use generation choices".

Mode mapping: Standard 2K -> generate_image.js --image-size 2K; Pro 2K -> pro exact 2K; Max quality -> pro exact 4K.

Patterns

Pick the one that fits. For source lookup, follow the project PROJECT_AGENT.md § "Choosing context"; this skill only owns image-specific prompt and CLI shape.

Character pre-flight. First ask: will this character appear in downstream video (video, clip, promo, 宣传片, 短片, 连续剧, film, scene, 拍片, shot, short film)?

• Read workflow.json for uploaded refs (subtype:"reference", metadata.source:"user_upload", not archived).
• Video-bound -> Pattern 7, not Pattern 1. Use ≥3 actor refs when available; with 0-2 refs, generate text-only 4-panel sheet.
• Announce one line before firing; allow redirect to Pattern 1.
• One-off static art/poster/portrait -> Pattern 1.

This pre-flight is non-negotiable. Pattern 1's single front portrait gives the video model an anchor that's too narrow; identity drifts shot-to-shot. Skipping straight to Pattern 1 for video work is the single most-common mistake.

Story/script anchor defaults. When script-compose or story-to-video-workflow routes a breakdown here:

• One base 4-panel sheet per material character.
• Extra sheets for material character variants: age, wardrobe/uniform/disguise, injury/dirty/wet/bloodied state, transformation, or continuity-significant looks.
• Detailed location anchors for settings that affect shots.
• Same-location variants for framing/scale/time/weather/light/dressing/story state/close-detail coverage changes.
• Prefer reference-to-clip after anchors. Storyboard only if requested, hard to control, or needed for diagnosis.
• Do not drop material variants for budget/speed; caller should adjust video resolution/runtime first.

1. Character portrait (one-off static stills only)

Triggers: character portrait/headshot/hero/villain/lead only for one-off static stills. Video-bound -> Pattern 7.

• node "$PAI_REPO_ROOT/server/cli/generate_image.js" --prompt "..." --aspect-ratio 9:16 --image-size 2K --subtype character --name "Detective Morris" --role "..." --description "..." — no refs. A character is an identity anchor, not a derivative.
• Prompt template:

> [style] character portrait of [NAME], [role]. [age, build, wardrobe, distinguishing features]. Front-facing medium close-up, eye-level, looking directly at camera, neutral expression. Plain neutral background, soft even lighting. No dramatic shadows, no stylized lighting, no side profile, no multiple views.

• Inherit project style or default to realistic. Name unnamed characters.
• No edges — characters are roots, so no --ref-source-id.

2. Location establishing still

Triggers: establish/design/picture a location, or approval of a script-compose location offer.

• node "$PAI_REPO_ROOT/server/cli/generate_image.js" --prompt "..." --aspect-ratio 16:9 --image-size 2K --subtype location --name "Causeway" --description "..." [--source-node-id <script_or_shot_note_id>] — no refs. A location is a setting anchor, not a derivative.
• Prompt template:

> [style] establishing still of [LOCATION NAME]. [visual brief — architecture, lighting, atmosphere]. Wide shot, eye-level, no characters present.

• Keep frame empty of characters. Include architecture/layout, surfaces, dressing, era, weather, time, light, and story state when relevant.
• Same-location variants preserve place identity while changing wide/close scale, day/night, weather, dressing, damage, or detail coverage.
• No ref edges by default. If the location was derived from a script or shot note, use --source-node-id so the authorship edge lands.
• *Follow-on:* after the last scripted location, recommend the next reference-to-clip render. Mention storyboard only if requested/needed.

3. Edit / variation / turnaround of an existing image

Triggers: change/edit/swap/replace/add/remove/tweak/what-if/variation on an existing image.

• Identify the source node (usually the most recent image_result, or one the user named). Grab source.id and source.metadata.aspect_ratio.
• node "$PAI_REPO_ROOT/server/cli/generate_image.js" --prompt "..." --aspect-ratio <source ratio> --image-size <source size or 2K> --subtype edit --source-node-id <source.id> --ref-source-id <source.id>.
• Prompt as a transformation, not a full re-description:

> <concrete change>. Preserve everything else.

✅ "Change the rain to falling snow. Keep the detective, wardrobe, and camera framing unchanged."

✅ "Render as a full 3D turnaround sheet of the same character. Preserve face, wardrobe, and proportions."

❌ "A detective in a snowy alley at night wearing a trench coat…" — over-specifies, identity drifts.

• The CLI emits the derived edge from <source.id> based on --ref-source-id.
• Multi-step chains use one edge/call per step; do not flatten A -> C.

4. Scene featuring existing characters

Triggers: put character in setting / shot of X and Y / character action in location.

• Identify each character involved — any image_result of that person (up to 16). Collect each one's id.
• node "$PAI_REPO_ROOT/server/cli/generate_image.js" --prompt "..." --aspect-ratio <fit the shot> --image-size 2K --ref-source-id <char1.id> --ref-source-id <char2.id> ....
• Prompt: the full scene description. Name each character by their role so the generator binds identity to role. Refer to them in the prompt as @Image1, @Image2, … in --ref-source-id order.
• No --subtype — a scene is neither a character nor an edit. CLI emits one derived edge per --ref-source-id.

5. Standalone still

Triggers: a fresh image unrelated to existing canvas content ("generate a mountain at dusk", "a noir alley — just the setting").

• Plain node "$PAI_REPO_ROOT/server/cli/generate_image.js" --prompt "..." with sensible defaults (16:9, 2K unless the user asks otherwise). No subtype, no refs.

6. Storyboard mosaic — one composite per clip / shot note

Triggers: storyboard, mosaic, grid, shot list, coverage, keyframe sheet, shot planning, image previs. Output is ONE composite per clip/<=15s shot note, not one image per panel.

• Tool/call: one generate_image_pro.js --size 2560x1440 --subtype storyboard --label "Storyboard — Shot <N>" --source-node-id <shot_note_id> per mosaic.
• Size: default 2560x1440; grid shape is cell layout, not canvas shape. Override only for explicit portrait/square/vertical/ratio:
• "2x2 storyboard" → 2560x1440 (default)
• "2x2 square storyboard" → 1920x1920
• "2x2 portrait storyboard" → 1440x2560
• "vertical 2x4 mosaic" → 1440x2560
• Grid/refs: default 2×2. Pass relevant character/location refs (≤32). Warn before 3×3+; recommend smaller sheets.

For the canvas pre-flight, per-shot-note iteration logic, missing-anchor nudge, verbatim prompt template, and default panel coverage when no script slice exists: see references/storyboard-mosaic.md.

Node fields the CLI sets

• ONE image_result node PER mosaic.
• Set data.subtype = "storyboard" by passing --subtype storyboard.

7. Character reference sheet *(default for ANY video-bound character work — with or without actor refs)*

Use proactively for any character that will appear in downstream video, regardless of actor refs.

Mode A — ≥3 uploaded actor refs. Pass photos as --ref-source-id; add --source-node-id <note_id> if a script/shot authored the design.

Mode B — 0-2 refs / from scratch. Omit actor refs; describe age/build/wardrobe/distinguishing features explicitly. Add --source-node-id <note_id> when authored by a note.

Also fires on explicit asks: "design a character sheet / turnaround / reference sheet / character design for [character]", "make a 4-panel character design", "generate a production reference sheet for downstream video work".

Output: one Front-full / Profile-full / Back-full / Closeup-bust sheet, passed directly to video as --ref-source-id.

• Pre-flight: identify uploaded reference nodes (subtype:"reference", ideally ≥3 photos). Confirm ref count in one line.
• node "$PAI_REPO_ROOT/server/cli/generate_image_pro.js" --prompt "..." --size 2560x1440 --subtype character --name "<character_name>" --role "..." --ref-source-id <ref1> --ref-source-id <ref2> --ref-source-id <ref3> [--source-node-id <script_or_shot_note_id>] — pro tier is the default for character sheets because panel layout, text suppression, and identity consistency are load-bearing. Do not pass --aspect-ratio or --image-size. Never fire Mode A with fewer than 3 refs (model overfits to the one angle it has).
• With 0-2 actor refs, use the Mode B text-only command from references/character-sheet.md: same pro command, but omit every actor-photo --ref-source-id; include --source-node-id only when a script or shot note authored the design.
• One call/sheet per base character or material variant. Generate base before variants. For identity-preserving variants, pass base sheet as ref and describe only persistent wardrobe/state change.
• Use the sheet as --ref-source-id <sheet_id> for downstream shots; no normal cropping needed.

For the verbatim 4-panel prompt template, optional per-angle crops, and gotchas (no-text rule, photo-priority, exact panel counts): see references/character-sheet.md.

Node fields the CLI sets

• ONE image_result node with data.subtype = "character".
• data.name, data.role, data.description from the CLI flags.
• One derived edge per --ref-source-id (so the sheet is provenance-linked to each actor photo it triangulated from).

After the CLI returns

For draft-stage JSON, one sentence with the price/status — see the project PROJECT_AGENT.md § "Draft gate". For terminal results, run the alignment check before the next-step recommendation — see the project PROJECT_AGENT.md § "Prompt alignment check".