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 instructions/is908/claude-lark-plugin/claude-mdgit clone --depth 1 https://github.com/IS908/claude-lark-pluginWrote 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/instructions/is908/claude-lark-plugin/claude-md)<a href="https://agentmods.dev/instructions/is908/claude-lark-plugin/claude-md"><img src="https://agentmods.dev/badge/instructions/is908/claude-lark-plugin/claude-md.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 | $0.04085 | $0.04085 |
| Opus 5 | $0.02042 | $0.02042 |
| Sonnet 5 | $0.00817 | $0.00817 |
| Haiku 4.5 | $0.00409 | $0.00409 |
Grade A, and why
claude-lark-plugin CLAUDE.md 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 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.
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 — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
Claude Lark Plugin is an MCP (Model Context Protocol) channel plugin that connects Claude Code to Feishu/Lark via WebSocket. It receives messages from Feishu users, enriches them with memory context, and forwards them to Claude Code. Responses flow back through the Feishu IM API.
Commands
npm start # Run with tsx (development)
npm run build # Compile TypeScript to dist/
npm run typecheck # Type-check without emitting
bash scripts/start.sh # Production launcher (loads lark-cli skills)
npm start -- --dry-run # Validate config and module loading without connecting
Architecture
src/index.ts – Entry point: wires MCP server, LarkChannel, memory, and buffer together
src/config.ts – Loads config from ~/.claude/channels/lark/.env (dotenv)
src/channel.ts – LarkChannel: Feishu WebSocket client, message parsing, memory enrichment pipeline
src/tools.ts – Registers 14 MCP tools: reply, edit_message, react, download_attachment, save_memory, save_skill, create_job, list_jobs, update_job, delete_job, what_do_you_know, forget_memory, reply_doc_comment, create_doc_comment
src/audit-log.ts – Append-only audit log for sensitive tool invocations
src/feishu-card.ts – Card builder: markdown optimization, Schema 2.0 card assembly
src/job-store.ts – Job CRUD: read/write JSON files, sanitizeJobId, expandScheduleAlias
src/scheduler.ts – JobScheduler: periodic scan (60s), trigger execution, crash recovery
src/queue.ts – Per-thread sequential message queue
src/memory/
file.ts – MemoryStore: local markdown files under ~/.claude/channels/lark/memories/ (Episodes, tiered Profiles public.md/private.md, Skills)
buffer.ts – In-memory ring buffer with auto-flush on inactivity
distiller.ts – Builds flush prompts to distill buffer into episodic memory; parseTieredProfile with L1 safety net
src/privacy-rules.ts – L1 hardcoded regex + keyword rules; L2 user-rules file (privacy-rules.md) read/append
src/enrichment-dedup.ts – EnrichmentDedup: content-hash dedup of memory_context blocks on hot threads (#189); renderEnrichmentParts assembly
src/session-health.ts – SessionHealthMonitor: idle+threshold-gated owner nudge to /compact (#190); reads Stop-hook-written session-stats sidecar
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 · 106 lines · 4,085 tokens per session scan A c5dcb0b744e0
claude-lark-plugin CLAUDE.md is an instructions file published in the GitHub repository IS908/claude-lark-plugin (7 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 4,085 tokens to every session, about $0.0204 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 2026-08-31.
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