Agent-Skills.md

Agent Skills: Video Router

Create short, explainer, or recorded-demo videos through the OMA video CLI. Use for scripts, narration, assets, composition, and video delivery.

UncategorizedID: first-fluke/fullstack-starter/oma-video

Repository

first-fluke/fullstack-starter
first-flukeLicense: MIT
22334

Install this agent skill to your local

pnpm dlx add-skill https://github.com/first-fluke/fullstack-starter/tree/HEAD/.agents/skills/oma-video

Skill Files

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.agents/skills/oma-video/SKILL.md

Skill Metadata

Name
oma-video
Description
"Create short, explainer, or recorded-demo videos through the OMA video CLI. Use for scripts, narration, assets, composition, and video delivery."

Video Router

Scheduling

When to use

Use this skill for a short/reel, README or code explainer, or demo walkthrough.

| Request | Mode | Default aspect | Required source | |---|---|---|---| | Short, reel, social clip | shorts | 9:16 | Topic or brief | | README, code, data explanation | explainer | 16:9 | Topic or source path | | Demo or walkthrough | demo | 16:9 | Human recording via --capture |

When NOT to use

Use oma-image for a still image, oma-slide for a deck, oma-voice for audio only, and oma-explanation for an interactive HTML explainer. Editing an existing finished video and live streaming are out of scope.

Structural Flow

Inputs are a brief plus optional mode, aspect, locale, captions, visual, voice, music, duration, compositor, capture path, and seed. Outputs live in .agents/results/videos/<timestamp>-<shortid>-<mode>/:

  • script.json, timing.json, and render-spec.json form the deterministic asset bus.
  • Captions and acquired audio/visual assets are recorded in manifest.json with hashes, providers, cost, warnings, and exit code.
  • A successful real render contains <mode>-<slug>.mp4, an encoded video stream, and a positive ffprobe duration.

OMA_VIDEO_MOCK=1 is a test harness only. It can create deterministic text placeholders with an .mp4 name; those files are never a user deliverable. A missing Remotion/MPT toolchain, an un-authored composition, a render error, or an invalid video fails with diagnostics and leaves the script/render spec for recovery.

Decide and confirm

Infer mode when clear: short/reel -> shorts; README/code/data/explain -> explainer; demo/walkthrough/capture -> demo. For a one-line request, state the inferred mode, aspect, duration, visual strategy, captions, locale, and voice/music before invoking. Do not make the user complete a questionnaire when those defaults are clear.

Ask only when it changes the result: an ambiguous mode/source, a required demo recording, or a cost confirmation. Respect an explicit mode, aspect, duration, captions, or voice verbatim.

For a demo, a human records the screen and controls login. --source web --url provides context only; it never automates login or starts a recorder. Without --capture, return guided capture instructions and stop.

Logical Operations

Guardrails

  1. Keep output and capture paths inside $PWD unless external output is explicitly allowed. Validate capture formats and copy external assets into the run directory. Mask URL query/hash tokens in logs and manifests.
  2. Provider configuration is key-optional: use the configured chain. Paid providers require their environment key and the cost guardrail. Local fallbacks may replace voice, visuals, captions, or music; record coverage in warnings. A compositor failure is never a fallback video.
  3. Confirm estimated spend at or above cost.guardrail_usd or --max-usd unless --yes or OMA_VIDEO_YES=1 authorizes it.
  4. Respect limits.max_duration_sec (180) and limits.max_scenes (40). Cancel subprocess work on SIGINT/SIGTERM.
  5. Keep run directories. Never auto-prune a user’s video artifacts.
  6. --dry-run writes only planning artifacts and does no provider render. It does not prove an MP4 exists.

Canonical command path

# Plan or create the asset bus. Supply --script whenever an agent authored it.
oma video generate "Jeju coffee" --mode shorts --aspect 9:16 \
  --captions tiktok --script ./script.json --output json

# Deterministic planning only; no real render or provider work.
oma video generate "explain this project" --mode explainer --seed 42 --dry-run

# Human-recorded demo input.
oma video generate "feature walkthrough" --mode demo --capture <absolute-path>.mp4

# Scaffold the per-run Remotion project, author src/Root.tsx as instructed,
# then render and validate the encoded output.
oma video compose <runDir> --output json
oma video render <runDir> --output json

# Diagnose required toolchains without changing a run.
oma video doctor
oma video provider list

oma video generate --output json returns {exitCode, runDir, manifestPath, scriptPath, renderSpecPath, warnings, error}. Read video and asset paths from the manifest; the JSON envelope has no outputs field.

Failure and recovery

  • Missing Remotion composition: oma video compose <runDir> prepares the project and authoring contract. Author <runDir>/remotion/src/Root.tsx using the generated AUTHORING.md, then invoke oma video render <runDir>. The command typechecks, renders, and ffprobes the output. Fix a reported composition or toolchain failure and re-run; return a failure report when it cannot render.

  • Missing MPT toolchain: --compositor mpt requires the installed checkout, its virtual environment, and ffmpeg. Use oma video doctor --install-mpt when setup is authorized and available. MPT setup failures, driver failures, and non-video output fail with the diagnostic; they do not write a placeholder MP4.

Success means all asset schemas and manifest hashes validate and a real MP4 passes video-stream and duration validation. A partial success may use a key-free visual, timing, caption, or music fallback, but it still requires that real video validation.

References

Conditional resources

Load only what the task needs:

  • resources/execution-protocol.md for the full ordered pipeline, failure mapping, and JSON reporting rules.
  • resources/vendor-matrix.md before changing providers, keys, cost, or fallback order.
  • resources/script-schema.md when authoring or validating --script input.
  • resources/prompt-tips.md when turning a brief into scene prompts.
  • resources/remotion-authoring/README.md and the selected mode guide before writing Root.tsx.
  • resources/checklist.md before handing a real video to a user.

Verification

For CLI/runtime changes, add a regression test for the affected success and failure paths. At minimum run the focused Vitest files, for example:

cd cli
bunx vitest run commands/video/providers/compositor.test.ts \
  commands/video/orchestrator.test.ts
bunx biome check commands/video/providers/compositor.ts \
  commands/video/providers/compositor.test.ts

Do not run a live render merely to test documentation or a mock-only branch.