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-avatargit 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-avatar)<a href="https://agentmods.dev/skills/fanfan-de/anybox/heygen-avatar"><img src="https://agentmods.dev/badge/skills/fanfan-de/anybox/heygen-avatar/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-avatar"><img src="https://agentmods.dev/badge/skills/fanfan-de/anybox/heygen-avatar.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 | $0.00293 | $0.06423 |
| Opus 5 | $0.00147 | $0.03211 |
| Sonnet 5 | $0.00059 | $0.01285 |
| Haiku 4.5 | $0.00029 | $0.00642 |
Grade C, and why
heygen-avatar 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.
**Neither available:** Only if MCP is unavailable AND the CLI doesn't work, 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/instal Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
**Neither available:** Only if MCP is unavailable AND the CLI doesn't work, 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/instal This is a copy
100% identical to heygen-avatar — 19 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 — 454 lines — stays where its author put it; the contents beside it link to each section on GitHub.
HeyGen Avatar Designer
Create and manage HeyGen avatars for anyone: the agent, the user, or named characters. Handles identity extraction, avatar generation, voice selection, and saves everything to AVATAR-<NAME>.md for consistent reuse.
Files & Paths
This skill reads and writes the following. No other files are accessed without explicit user instruction.
| Operation | Path | Purpose |
|---|---|---|
| Read | SOUL.md, IDENTITY.md |
Extract identity details when creating an avatar for the agent |
| Read | AVATAR-<NAME>.md |
Load existing avatar identity (for variant looks, voice updates) |
| Write | AVATAR-<NAME>.md |
Save new avatar identity after creation |
| Write | AVATAR-AGENT.md, AVATAR-USER.md (symlinks) |
Role aliases, see Phase 5 |
| 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 photos uploaded to HeyGen for digital-twin creation |
Assets are only uploaded to HeyGen when the user explicitly provides them.
Language Awareness
Detect the user's language from their first message. Store as user_language (e.g., en, ja, es, ko, zh, fr, de, pt).
- Communicate with the user in their language. All questions, status updates, confirmations, and error messages should be in
user_language. - Voice design prompts and selection respect
user_language. When designing or selecting a voice, specify the target language so the voice library returns matches that speak it. - Technical directives stay in English — enum values (
Young Adult,Realistic,landscape, etc.) are API-level and not translated.
UX Rules
- Be concise. No avatar IDs, group IDs, or raw API payloads in chat. Report the result (avatar created, ready to use) not the plumbing.
- No internal jargon. Never mention internal phase names ("Phase 0", "Phase 5 Symlink Maintenance") to the user. The user sees natural conversation: "Setting up your avatar\u2026" not "Running Phase 2 avatar creation."
- One or two questions per phase. Don't batch-ask. Walk phases in order, ask the smallest set of questions needed to proceed.
- Read workspace files before asking.
SOUL.md,IDENTITY.md,AVATAR-*.mdat the workspace root contain identity. Check them first. Only ask the user for what's genuinely missing. - Don't narrate skill internals. Never say "let me read the workflow," "checking the reference files," "loading the avatar discovery guide." Read silently. The user sees questions and results, not internal navigation.
- Don't announce what you're about to do. Skip meta-commentary like "Creating the avatar now." Just do the work. If a step takes time, the next thing the user hears should be the result (or a checkpoint question).
- Never narrate transport choice. MCP vs CLI is internal. Pick the transport silently and never mention it. If both are unavailable, ask the user to configure one without explaining why.
What ships with it
3 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.
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 · 454 lines · 293 tokens per session scan C d178e852c931
heygen-avatar is a skill published in the GitHub repository fanfan-de/anybox (57 stars, last pushed 1mo ago), licensed MIT. It adds 293 tokens to every session and 6,423 once invoked, about $0.0015 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 100% identical to heygen-avatar, differing in 19 lines, and is treated as a copy.
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