Borrowing it
Nothing to install: this file belongs to jleechanorg/mcp_agent_mail_archived. 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/jleechanorg/mcp_agent_mail_archived/main/CLAUDE.mdgit clone --depth 1 https://github.com/jleechanorg/mcp_agent_mail_archivedWrote 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/jleechanorg/mcp_agent_mail_archived/claude-md)<a href="https://agentmods.dev/instructions/jleechanorg/mcp_agent_mail_archived/claude-md"><img src="https://agentmods.dev/badge/instructions/jleechanorg/mcp_agent_mail_archived/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 | $0.01004 | $0.01004 |
| Opus 5 | $0.00502 | $0.00502 |
| Sonnet 5 | $0.00201 | $0.00201 |
| Haiku 4.5 | $0.00100 | $0.00100 |
Grade A, and why
mcp_agent_mail_archived 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 — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Code Agent Notes
Claude Code (or Claude Desktop) must assume the MCP Agent Mail server is already running in the background before it connects. Always start/refresh the server with a background bash -lc call so you capture the PID and tee logs to a safe location.
Running from PyPI Package (Recommended)
Use the published PyPI package for production use:
bash -lc "cd /Users/jleechan/mcp_agent_mail && ./scripts/run_server_pypi.sh >/tmp/mcp_agent_mail_server.log 2>&1 & echo \$!"
This installs mcp_mail from PyPI in an isolated environment and runs the server.
Running from Local Source (Development)
For development with local code changes:
bash -lc "cd /Users/jleechan/mcp_agent_mail && ./scripts/run_server_with_token.sh >/tmp/mcp_agent_mail_server.log 2>&1 & echo \$!"
Running from Local Build (Testing)
For testing locally built packages before publishing to PyPI:
bash -lc "cd /Users/jleechan/mcp_agent_mail && ./scripts/run_server_local_build.sh >/tmp/mcp_agent_mail_server.log 2>&1 & echo \$!"
This script:
- Uses the wheel file from
dist/(built withuv build) - Installs in an isolated temporary virtual environment
- Uses Python 3.11-3.13 (avoiding Python 3.14 RC due to Pydantic compatibility issues)
- Runs the server from the locally built package
General Notes
- Keep the printed PID handy; stop the service with
kill <PID>when you are done. - Tail
/tmp/mcp_agent_mail_server.logif Claude reports connection errors. - Launch Claude Code/Claude Desktop after the command above succeeds so it can reuse the existing HTTP MCP endpoint at
http://127.0.0.1:8765/mcp/.
With the server running, Claude agents can call ensure_project, register_agent, fetch_inbox, and the other MCP tools without additional setup.
PR Responsibility Model
When working on pull requests, understand that PRs own all regressions versus origin/main, regardless of which commit in the PR introduced them.
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 · 93 lines · 1,004 tokens per session scan A 6106ef03e373
mcp_agent_mail_archived CLAUDE.md is an instructions file published in the GitHub repository jleechanorg/mcp_agent_mail_archived (1 stars, last pushed 6mo ago), licensed MIT. It adds 1,004 tokens to every session, about $0.0050 per session on Opus 5. A static security scan graded it A with 0 findings. It comes from a forked repository.
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