Borrowing it
Nothing to install: this file belongs to hanzili/comet-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/hanzili/comet-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/hanzili/comet-mcpWrote 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/hanzili/comet-mcp/claude-md)<a href="https://agentmods.dev/instructions/hanzili/comet-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/hanzili/comet-mcp/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 | $0.00530 | $0.00530 |
| Opus 5 | $0.00265 | $0.00265 |
| Sonnet 5 | $0.00106 | $0.00106 |
| Haiku 4.5 | $0.00053 | $0.00053 |
Grade A, and why
comet-mcp 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 8d 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 — 52 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
What This Is
MCP server connecting Claude Code to Perplexity's Comet browser via Chrome DevTools Protocol (CDP).
Architecture
Claude Code → MCP Server (index.ts) → CometAI (comet-ai.ts) → CDP Client (cdp-client.ts) → Comet Browser
6 Tools
comet_connect- Start/connect to Comet browsercomet_ask- Send prompt, wait for response (15s default, use poll for longer)comet_poll- Check status of long-running taskscomet_stop- Stop current taskcomet_screenshot- Capture current pagecomet_mode- Switch Perplexity modes (search/research/labs/learn)
Key Implementation Details
Response extraction (comet-ai.ts:getAgentStatus):
- Takes LAST prose element (not longest) - conversation threads show newest last
- Filters out UI text (Library, Discover, etc.) and questions (ends with ?)
Follow-up detection (index.ts):
- Captures old prose count/text before sending
- Waits for NEW response (different text or more elements)
Prompt normalization:
- Strips bullet points, collapses newlines to spaces
Build & Test
npm run build
pgrep -f "node.*comet-mcp" | xargs kill # Restart MCP
Manual testing only (integration code, external DOM dependency).
Test Cases
- Quick queries - Simple questions (math, facts) should return within 15s
- Non-blocking - Short timeout returns "in progress", use poll to get result
- Follow-up - Second question in same chat detects NEW response correctly
- Agentic task - "Take control of browser and go to X" triggers browsing
- newChat after agentic -
newChat: trueresets CDP state after browser control - Mode switching -
comet_modechanges search/research/labs/learn
Known Edge Cases
- Prompt not submitted: If response shows 0 steps + COMPLETED, prompt may not have been submitted. Retry or use newChat.
- Stale poll response: If poll returns unrelated response, the previous prompt failed. Send again.
- Research mode: Takes longer than search mode, may need multiple polls.
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.
- 8d ago First seen · 52 lines · 530 tokens per session scan A 5a9a3635d05d
comet-mcp CLAUDE.md is an instructions file published in the GitHub repository hanzili/comet-mcp (178 stars, last pushed 7mo ago), licensed MIT. It adds 530 tokens to every session, about $0.0027 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.
Other instructions, from other repositories
agent-compass pr-workflow.instructions.md
Instructions for me-cedric/agent-compass: For PR creation, default base branch is develop. Assign the PR to yourself with --assignee @me. If reviewers are not specified, ask for at least one and list likely repo contributors. Use only labels that exist in gh label list.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).