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/basementstudio/xmcp/claude-mdgit clone --depth 1 https://github.com/basementstudio/xmcpWrote 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/basementstudio/xmcp/claude-md)<a href="https://agentmods.dev/instructions/basementstudio/xmcp/claude-md"><img src="https://agentmods.dev/badge/instructions/basementstudio/xmcp/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 | $0.00141 | $0.00141 |
| Opus 5 | $0.00071 | $0.00071 |
| Sonnet 5 | $0.00028 | $0.00028 |
| Haiku 4.5 | $0.00014 | $0.00014 |
Grade A, and why
xmcp 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 4d 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.
What it actually says
xmcp Claude guidance
Read the shared agent guidance before editing:
@AGENTS.md @packages/AGENTS.md @examples/AGENTS.md @apps/website/AGENTS.md
Before touching runtime transports or tool extras, apply the stateless HTTP
rules in AGENTS.md and packages/AGENTS.md: do not recover metadata from
hidden per-client server state unless the task explicitly adds an opt-in
stateful transport.
Run /review-rules on your diff before handing work back. The local Stop hook
may also run .claude/hooks/valerules-check.sh to catch formatting, excess
logging, and fixed-ms timers.
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.
- 4d ago First seen · 18 lines · 141 tokens per session scan A 216d84fc8da0
xmcp CLAUDE.md is an instructions file published in the GitHub repository basementstudio/xmcp (1,325 stars, last pushed today), licensed MIT. It adds 141 tokens to every session, about $0.0007 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
eve AGENTS.md
AGENTS.md instructions for vercel/eve, covering agents.md, about eve, repository layout, git workflow and commands.
open-mercato AGENTS.md
AGENTS.md instructions for open-mercato/open-mercato, covering agents guidelines, always, ask first, never and validation commands.
dawnai AGENTS.md
AGENTS.md instructions for cacheplane/dawnai, covering agents.md, what this is (and isn't), workspace map, definition of done and conventions.
crust AGENTS.md
AGENTS.md instructions for chenxin-yan/crust, covering tests, documentation, changesets, agent skills and issue tracker.
frontmcp CLAUDE.md
Claude Code instructions for agentfront/frontmcp, covering skills and tools, documentation site layout, frontmcp monorepo - development guide, repository structure and primary libraries (scoped under @frontmcp/).
keryx CLAUDE.md
Instructions for actionhero/keryx, covering claude.md, project overview, monorepo structure, development environment and environment setup.