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 OpenCoven/coven --skill heygen-avatargit clone --depth 1 https://github.com/OpenCoven/covenWrote 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/opencoven/coven/heygen-avatar)<a href="https://agentmods.dev/skills/opencoven/coven/heygen-avatar"><img src="https://agentmods.dev/badge/skills/opencoven/coven/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/opencoven/coven/heygen-avatar"><img src="https://agentmods.dev/badge/skills/opencoven/coven/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 | $0.04563 |
| Opus 5 | $0.00147 | $0.02282 |
| Sonnet 5 | $0.00059 | $0.00913 |
| Haiku 4.5 | $0.00029 | $0.00456 |
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 10d 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
89% identical to heygen-avatar — 158 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 — 325 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.
Start Here (Critical)
Default target = the agent. The primary use of this skill is giving the agent a face + voice so it can present videos. Route to "user" only on explicit "my avatar" / "me" / "my photo" language. When in doubt, make the agent's avatar.
Do NOT batch-ask questions. No "give me a photo, voice preference, duration, target platform, tone, key message" all at once. Walk phases in order. Each phase asks at most one or two things at a time.
For agent avatars: read SOUL.md and IDENTITY.md first, then go straight to prompt-based creation. Do NOT ask the user for a photo or appearance details first. The agent's identity lives in those workspace files. Only ask the user for traits that are genuinely missing.
Prompt-based is the default creation path. Photo is opt-in, only relevant when the user explicitly wants a real-person digital twin of themselves. Agents and named characters almost always use prompt-based creation.
Before You Start (environment detection)
Try to read SOUL.md from the workspace root.
- Found → OpenClaw environment. Skip this entire section and go straight to Phase 0. Workspace-native identity (SOUL.md, IDENTITY.md) will drive agent onboarding.
- Not found → Claude Code environment, no workspace identity files. Still go to Phase 0 next — do NOT skip ahead to listing user avatars or asking the user for a photo.
⚠️ AVATAR file caveat: Ignore any AVATAR-*.md files found in the workspace that belong to a different person or agent (e.g., AVATAR-Eve.md when creating an avatar for Claude). Only use an AVATAR file if its name matches the subject you're creating for right now.
⚠️ Do NOT fetch HeyGen avatars yet. That's a Phase 0 sub-step (only after target detection). Fetching before Phase 0 causes the agent to frame the conversation around "your existing avatars" when the default should be creating one for the agent itself.
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.
- 10d ago First seen · 325 lines · 293 tokens per session scan C ab0dd798fc29
heygen-avatar is a skill published in the GitHub repository OpenCoven/coven (47 stars, last pushed 2d ago), licensed MIT. It adds 293 tokens to every session and 4,563 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 89% identical to heygen-avatar, differing in 158 lines, and is treated as a copy.
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