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 holon-run/uxc --skill feishu-openapi-skillgit clone --depth 1 https://github.com/holon-run/uxcWrote 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/holon-run/uxc/feishu-openapi-skill)<a href="https://agentmods.dev/skills/holon-run/uxc/feishu-openapi-skill"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/feishu-openapi-skill/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/holon-run/uxc/feishu-openapi-skill"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/feishu-openapi-skill.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 Data Exfiltration · line 103 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
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 | $0.00036 | $0.02425 |
| Opus 5.5 | $0.00014 | $0.00970 |
| Sonnet 5.5 | $0.00007 | $0.00485 |
| Haiku 4.5 | $0.00004 | $0.00243 |
Grade A, and why
feishu-openapi-skill scanned grade A with 1 finding 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 1mo 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -sS https://open.feishu.cn/open-apis/auth/v3/tenant_access_token/internal \ How it starts
The opening of the file, as written. The whole thing — 243 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Feishu / Lark IM Skill
Use this skill to run Feishu or Lark IM operations through uxc + OpenAPI.
Reuse the uxc skill for shared execution, auth, and error-handling guidance.
Prerequisites
uxcis installed and available inPATH.- Network access to
https://open.feishu.cn/open-apisorhttps://open.larksuite.com/open-apis. - Access to the curated OpenAPI schema URL:
https://raw.githubusercontent.com/holon-run/uxc/main/skills/feishu-openapi-skill/references/feishu-im.openapi.json
- A Feishu or Lark app with bot capability enabled.
- A Feishu or Lark app
app_id+app_secret, or a currenttenant_access_tokenif you are using the manual fallback path.
Scope
This skill covers an IM-focused request/response surface:
- bot identity lookup
- chat lookup
- chat member lookup
- image and file upload for IM sends
- message send and reply
- selected message history reads
- basic user lookup through contact APIs
This skill does not cover:
- docs, bitable, approval, or non-IM product families
- the full Feishu or Lark Open Platform surface
Subscribe Status
Feishu and Lark expose event-delivery models beyond plain request/response APIs, including long-connection event delivery in the platform ecosystem.
Current uxc subscribe status:
- request/response IM operations are validated
- inbound message intake is validated through the built-in
feishu-long-connectiontransport - live validation confirmed real
im.message.receive_v1events delivered into the subscribe sink for ap2pbot chat
Important runtime notes:
feishu-long-connectionis a provider-aware transport insideuxc subscribe; it is not a plain raw WebSocket stream- the runtime opens a temporary WebSocket URL from
/callback/ws/endpoint - frames are protobuf binary messages, not text JSON
- the runtime sends required event acknowledgements and ping control frames automatically
Endpoint Choice
This schema works against either Feishu or Lark Open Platform base URLs:
What ships with it
6 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.
- 1mo ago First seen · 243 lines · 36 tokens per session scan A b10323fff633
feishu-openapi-skill is a skill published in the GitHub repository holon-run/uxc (119 stars, last pushed 1mo ago), licensed MIT. It adds 36 tokens to every session and 2,425 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (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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