Game Cg Director

Game CG Director

Build one validated directing envelope per generated clip. For 3AGameFactory, write it directly as a Harness task row; for standalone use, return the envelope file. Never call a video-generation API or write generated media.

Establish caller context

Require the caller to provide:

• an approved game plan, CG requirement, or standalone CG intent;
• the clip purpose: opening, cutscene, ultimate, or promo;
• one intended output clip per requested task, with acceptance criteria;
• optional material paths and the declared role of each material;
• the selected model (h3 or seedance), or permission to use the default;
• optional duration, aspect ratio, seed, and stable task_id.

When 3AGameFactory invokes this Skill as a child capability, also require the selected game_id and use its standard authoring workspace:

test_data/test_samples/<game_id>/cg_video/
├── requirement.txt
├── ref_images/                 # optional source material
├── ref_videos/                 # optional source material
├── ref_audio/                  # optional source material
└── cg_tasks.jsonl              # written directly by this Skill

Do not choose the generated-artifact directory here. The parent Skill and <REPO_PATH>/pipeline/common/paths.py own run_id and final output paths.

For a multi-clip sequence, create and validate one envelope per independently generated clip. Keep task IDs unique and preserve continuity anchors between envelopes. Do not represent several independently generated clips as one task.

Establish input evidence

1. Inventory intent, settings, material paths, and each declared material role before choosing a mode. Preserve supplied paths and roles verbatim.
2. Inspect accessible materials. Use only observed facts or explicit user descriptions, and keep those sources distinct in working context.
3. Treat inaccessible material as opaque: preserve its path, never infer content from names or story context, and ask for one short description only when the requested motion or endpoint depends on an unknown fact.
4. For T2VA or content not fixed by a reference, add only compatible concrete detail needed for scene coherence, composition, continuity, timing, or sound; never present it as a reference fact.
5. Do not claim opaque media was inspected or add an evidence record to the output JSON.

Route the request

1. Select exactly one scene: opening, cutscene, ultimate, or promo. Infer it from the requested purpose; ask only if the intent is ambiguous.
2. Select exactly one mode and use its JSON value:
   • no media input: T2VA → text_to_video;
   • one image explicitly used as the first frame: I2VA → first_frame_to_video;
   • two images explicitly used as first and last frames: FL2VA → first_last_frame_to_video;
   • one or more materials used as references rather than endpoints: Ref2VA → reference_to_video;
   • never select or mention the excluded last-frame-only mode.
3. Use the requested model, normalized to lowercase; otherwise use h3. Read <REPO_PATH>/models/<model>.md. If the profile does not exist, stop instead of inventing one.

Read only the selected guidance

Treat the model profile as output dialect and the selected scene template as the game-CG task layer. Read these files in order:

1. common/principles.md
2. common/camera.md
3. common/sound.md
4. common/style-mapping.md only when the request contains a style term
5. exactly one modes/<mode>.md: t2va, i2va, fl2va, or ref2va
6. exactly one templates/<scene>.md
7. <REPO_PATH>/models/<model>.md

Do not preload sibling modes or scenes. Write prompt prose in English. Preserve user-supplied dialogue, lyrics, and visible scene text verbatim and format them according to the model profile.

Direct before writing

Make a compact private scene plan; never add it to the JSON or prompt. Record only what the request needs:

1. continuity anchors: recurring subjects, required count, distinguishing appearance or reference role, and carried state;
2. stage map: relative positions, entrances or boundaries, facing, goal or target, and the main line of action;
3. performance beats: start → preparation → action → reaction or result → end;
4. shot purpose: new information, camera side and direction, dominant movement, and ending composition;
5. sound progression: established sources, dialogue timing, audible peak, and music change when applicable.

Fit indispensable beats inside the available duration before adding decorative beats. Preserve recurring identities and counts, causal order, spatial direction, readable performance, and the requested endpoint.

Resolve settings

• Preserve a supplied aspect_ratio; otherwise use 16:9 and record aspect_ratio:16:9 in meta.defaults_applied.
• Preserve duration within model limits. Cap or raise it to a model limit when necessary and record the adjustment in meta.defaults_applied.
• If duration is absent, use opening=10, cutscene=12, ultimate=6, or promo=10, then apply the model limit and record the final default.
• When the model is absent, record model:h3 in meta.defaults_applied.
• Preserve a supplied task_id; otherwise create a short stable ID from the subject, scene, mode, and a numeric suffix.
• Preserve a supplied integer seed; otherwise omit it.

Build and hand off each task

Follow schemas/output.schema.json. Keep the envelope compact:

• Put the complete prompt prose directly in prompt.
• Keep model, mode, scene, material paths, and meta at the top level.
• Add first_frame_path for I2VA and both endpoint paths for FL2VA.
• For Ref2VA, add only applicable reference path arrays.
• Never place metadata, Skill names, provider names, or vendor names in prompt.
• Do not add game_id or run_id before envelope validation. The schema intentionally validates directing fields independently of Harness identity.

For an 3AGameFactory child call:

1. Build the envelope without game_id or run_id.
2. Write it to a unique temporary JSON file outside the repository and run the bundled validator on that file.
3. After validation passes, add only the selected game_id and write the full object as one compact line directly to <REPO_PATH>/test_data/test_samples/<game_id>/cg_video/cg_tasks.jsonl.
4. Preserve row order and unrelated tasks. Reject a duplicate task_id unless the caller explicitly requested a revision; then replace that row in place.
5. Remove the temporary validation file. Never create a persistent director/ workspace directory.

For standalone use, write to the caller's requested path. If no path is requested, write game-cg-<scene>-<mode>-<task_id>.json in the current working directory.

Validate until it passes

Validate each envelope before adding game_id or writing an 3AGameFactory task row. For standalone use, validate the written envelope. Run:

python3 <skill-directory>/scripts/validate_output.py <envelope-json-path>

Validation is mandatory. If it fails, change only the reported violations and rerun the same command until it exits with code 0. Never call an LLM from the validator and never substitute visual inspection for validation.

Hand off to the parent Skill

For 3AGameFactory, return the cg_tasks.jsonl path, ordered task IDs, and validation status. The parent ../SKILL.md selects backend and aspect-ratio runner options and invokes the generation pipeline. For standalone use, return the ordered envelope paths and validation status.

Do not choose an output run_id, invoke a model, spend cloud credits, or claim that a generated video exists.