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 agentmods add skills/opencoven/coven/heygennpx skills add OpenCoven/coven --skill heygengit 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)<a href="https://agentmods.dev/skills/opencoven/coven/heygen"><img src="https://agentmods.dev/badge/skills/opencoven/coven/heygen.svg" alt="Measured on agentmods" 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 | $0.00000 | $0.00916 |
| Opus 5 | $0.00000 | $0.00458 |
| Sonnet 5 | $0.00000 | $0.00183 |
| Haiku 4.5 | $0.00000 | $0.00092 |
Grade C, and why
heygen 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 6d 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.
- `heygen` CLI — install: `curl -fsSL https://static.heygen.ai/cli/install.sh | bash`. Verify: `heygen auth status`. Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- `heygen` CLI — install: `curl -fsSL https://static.heygen.ai/cli/install.sh | bash`. Verify: `heygen auth status`. How it starts
The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.
HeyGen Video Agent — NanoClaw Container Skill
When to Use
Use this skill when the user wants to create a video with an AI avatar presenter. Triggers: "make a video", "create a video message", "record a video", "avatar video", "talking head video", "video pitch", "video update".
NOT for: image generation, audio-only TTS, video translation, or cinematic b-roll.
Required Environment
HEYGEN_API_KEY— Get from https://app.heygen.com/settings?nav=APIheygenCLI — install:curl -fsSL https://static.heygen.ai/cli/install.sh | bash. Verify:heygen auth status.
Steps
Step 1: Discover Available Avatars
heygen avatar list --ownership public --limit 5 | jq '.data[] | {group_id, avatar_name}'
Pick an avatar_id. If the user has a specific avatar, use that ID. To see looks for a group: heygen avatar looks list --group-id <group_id>.
Step 2: Find a Voice
heygen voice list --limit 10 | jq '.data.voices[] | {voice_id, display_name, language}'
Pick a voice_id matching the desired language and tone.
Step 3: Write the Script
Write a spoken-word script for the avatar. Rules:
- Write for speech, not text. Short sentences. Natural pauses.
- 150 words per minute is the target pace.
- 30 seconds = ~75 words. 60 seconds = ~150 words.
- No stage directions. No markdown. Just what the avatar says.
Step 4: Generate the Video
heygen video-agent create \
--prompt "YOUR SCRIPT HERE" \
--avatar-id "AVATAR_ID_HERE" \
--voice-id "VOICE_ID_HERE" \
--orientation landscape \
--wait --timeout 10m
With --wait, the CLI blocks until the video completes and emits the final status object. Without --wait, submission returns immediately — save the session_id from stdout for manual polling.
--timeout 10m is sized for short videos (≤60s). Bump to --timeout 45m for videos >60s or when targeting 2+ minute output — Video Agent generation routinely takes 20-45m for longer clips.
Step 5: Poll for Completion (only without --wait)
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.
- 6d ago First seen · 100 lines · 0 tokens per session scan C 880f6b458e5a
heygen is a skill published in the GitHub repository OpenCoven/coven (46 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 916 tokens. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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