ESP-Claw is an AI agent framework that runs on Espressif IoT chips and lets people define device behavior through conversation. It handles local sensing, decision-making, and execution for connected devices, with support for event-driven actions, structured memory, and MCP communication.
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 espressif/esp-claw --skill skills_lab_downloadergit clone --depth 1 https://github.com/espressif/esp-clawWrote 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/espressif/esp-claw/skills_lab_downloader)<a href="https://agentmods.dev/skills/espressif/esp-claw/skills_lab_downloader"><img src="https://agentmods.dev/badge/skills/espressif/esp-claw/skills_lab_downloader/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/espressif/esp-claw/skills_lab_downloader"><img src="https://agentmods.dev/badge/skills/espressif/esp-claw/skills_lab_downloader.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Excessive Agency · line 32 Skill grants unrestricted tool access without appropriate constraints. An agent with unfettered tool access can perform arbitrary actions including file modification, network requests, and code execution.Fix: Restrict tool access to only the tools required for the skill's stated purpose. Use an explicit allowlist rather than granting blanket access.
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 | $0.00038 | $0.01147 |
| Opus 5 | $0.00019 | $0.00574 |
| Sonnet 5 | $0.00008 | $0.00229 |
| Haiku 4.5 | $0.00004 | $0.00115 |
Grade A, and why
skills_lab_downloader scanned grade A with 0 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 11d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skills Lab Downloader
Use this skill when the user wants to install a skill from the ESP-Claw's Skill hub at skills-lab.esp-claw.com.
When to use
- The user wants to download or install a skill from the ESP-Claw's Skill hub.
- The user already knows the exact skill name, or needs a reminder that installation requires the exact skill name instead of the visible title.
Hard rules
- Installation requires the exact skill name, not the skill title.
- A valid skill name contains only
A-Z,a-z,0-9,_, or-. - Before downloading, make sure
cap_http_requestis enabled and available. If it is unavailable, stop and tell the user to enable HTTP request first. - Use
{CUR_SKILL_DIR}/scripts/download_skill.luafor hub download requests. Do not manually recreate the HTTP flow outside this script. - First fetch
_metadata.jsonand return it to yourself as a raw JSON string. Treat that string as the source of truth for install decisions. - If metadata fetch returns a 404 result, tell the user the skill does not exist and stop.
- If metadata fetch fails with an allowlist error such as
HTTP allowlist is emptyorhost 'skills-lab.esp-claw.com' is not in allowlist, tell the user to add*.esp-claw.comto the Web Console allowlist and stop. - Before installation, inspect
metadata.peripherals. If it is non-empty, activateboard_hardware_infoand compare every listed peripheral against the current board device inventory. - If one or more required peripherals are unavailable, do not install by default. Tell the user which peripherals are missing and stop unless the user explicitly asks to force install.
- Only after compatibility is confirmed, or the user explicitly approves force install, run the install step.
- After the install script succeeds, registration is optional: call
register_skillonly when the user or workflow needs the skill to be available toactivate_skillimmediately. - If
register_skillis called and succeeds, tell the user the skill has been installed and registered. If it is skipped, tell the user the skill has been installed and will become available after the next registry reload or device restart. - Do not ask Lua to parse
_metadata.json. The model must read the JSON string, make the install decision, and pass the file lists to Lua as structured args.
What ships with it
1 file 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.
- 11d ago First seen · 96 lines · 38 tokens per session scan A 1e29bad840d8
skills_lab_downloader is a skill published in the GitHub repository espressif/esp-claw (2,104 stars, last pushed 2d ago), licensed Apache-2.0. It adds 38 tokens to every session and 1,147 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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