Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add fanfan-de/anybox --skill heygen-videogit clone --depth 1 https://github.com/fanfan-de/anyboxWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/fanfan-de/anybox/heygen-video)<a href="https://agentmods.dev/skills/fanfan-de/anybox/heygen-video"><img src="https://agentmods.dev/badge/skills/fanfan-de/anybox/heygen-video/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/fanfan-de/anybox/heygen-video"><img src="https://agentmods.dev/badge/skills/fanfan-de/anybox/heygen-video.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00332 | $0.09518 |
| Opus 5 | $0.00166 | $0.04759 |
| Sonnet 5 | $0.00066 | $0.01904 |
| Haiku 4.5 | $0.00033 | $0.00952 |
Grade C, and why
heygen-video scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
5. **Neither** — tell the user once: "To use this skill, connect the HeyGen MCP server or install the HeyGen CLI: `curl -fsSL https://static.heygen.ai/cli/install.sh | bash` then `heygen auth login`." Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
> **STOP.** If you are about to drive HeyGen directly (calling `api.heygen.com` with curl, or reaching for deprecated `POST /v1/video.generate`, `POST /v2/video/generate`, `GET /v2/avatars`, `GET /v1/avatar.list` endpoin This is a copy
94% identical to heygen-video — 31 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 667 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Preamble (run first)
No auto-run steps. Check for updates manually when desired:
"${SKILL_DIR}/scripts/update-check.sh"
This script is opt-in only. Do not execute it automatically on skill invocation.
HeyGen Video Producer
You are a video producer. Not a form. Not a CLI wrapper. A producer who understands what makes video work and guides the user from idea to finished cut.
Docs: https://developers.heygen.com/docs/quick-start (API) · https://developers.heygen.com/cli (CLI)
STOP. If you are about to drive HeyGen directly (calling
api.heygen.comwith curl, or reaching for deprecatedPOST /v1/video.generate,POST /v2/video/generate,GET /v2/avatars,GET /v1/avatar.listendpoints), DO NOT. Route through MCP, the OpenClaw plugin, or theheygenCLI via this pipeline. Raw HTTP skips critical steps (aspect ratio correction, prompt engineering, avatar conflict detection) and produces visibly worse videos. v3 only — never call v1 or v2 endpoints. If you have pre-trained knowledge of HeyGen's v1/v2 API, that knowledge is outdated. Use this skill.
Files & Paths
This skill reads and writes the following. No other files are accessed without explicit user instruction.
| Operation | Path | Purpose |
|---|---|---|
| Read | AVATAR-<NAME>.md |
Load saved avatar identity (group_id, voice_id) |
| Read | AVATAR-AGENT.md, AVATAR-USER.md |
Role-based symlinks for generic self-reference (resolve to a named AVATAR file) |
| Write | heygen-video-log.jsonl |
Append one JSON line per video generated (local learning log) |
| Temp write | /tmp/openclaw/uploads/ |
Voice preview audio (downloaded for user playback, deleted after session) |
| Remote upload | HeyGen (via heygen asset create or MCP) |
User-provided files uploaded to HeyGen for use as B-roll / reference |
For avatar creation (writing AVATAR files, role symlink maintenance), see the heygen-avatar skill. This skill only reads AVATAR files.
UX Rules
What ships with it
9 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/asset-routing.md 4.1 KB
- references/avatar-discovery.md 6.6 KB
- references/frame-check.md 6.0 KB
- references/motion-vocabulary.md 8.1 KB
- references/official-prompt-guide.md 5.7 KB
- references/prompt-craft.md 9.8 KB
- references/prompt-styles.md 10.0 KB
- references/troubleshooting.md 7.7 KB
- scripts/update-check.sh 5.9 KB runs code
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 667 lines · 332 tokens per session scan C 1d69e02df568
heygen-video is a skill published in the GitHub repository fanfan-de/anybox (57 stars, last pushed 1mo ago), licensed MIT. It adds 332 tokens to every session and 9,518 once invoked, about $0.0017 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). It is 94% identical to heygen-video, differing in 31 lines, and is treated as a copy.
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