Borrowing it
Nothing to install: this file belongs to mxcoppell/mmdp. 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/mxcoppell/mmdp/main/CLAUDE.mdgit clone --depth 1 https://github.com/mxcoppell/mmdpWrote 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/mxcoppell/mmdp/claude-md)<a href="https://agentmods.dev/instructions/mxcoppell/mmdp/claude-md"><img src="https://agentmods.dev/badge/instructions/mxcoppell/mmdp/claude-md/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/instructions/mxcoppell/mmdp/claude-md"><img src="https://agentmods.dev/badge/instructions/mxcoppell/mmdp/claude-md.svg" alt="Reviewed on agentmods" width="80" 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 | $0.01301 | $0.01301 |
| Opus 5.5 | $0.00520 | $0.00520 |
| Sonnet 5.5 | $0.00260 | $0.00260 |
| Haiku 4.5 | $0.00130 | $0.00130 |
Grade A, and why
mmdp 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 2mo 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 — 141 lines — stays where its author put it; the contents beside it link to each section on GitHub.
mmdp
Lightweight CLI to preview Mermaid diagrams in a native frameless window (macOS only).
For LLM Agents
To display a mermaid diagram, pipe it to stdin. The CLI opens a native frameless window and exits immediately (exit code 0).
echo "graph TD; A-->B-->C" | mmdp
On success, the CLI prints Previewing <name> to stdout so agents can
confirm the window opened. If a file is already open, it prints
Previewing <name> (reused) and activates the existing window (no duplicate).
This is the recommended way for agents to show diagrams. The window stays open after the CLI exits.
You can also preview an existing file (this starts a server with live reload):
mmdp diagram.mmd
Quick Usage
# Fire-and-forget preview (stdin — CLI exits immediately)
echo "graph LR; A-->B" | mmdp
# Live preview with file watching
mmdp diagram.mmd
# Multiple files — each gets its own window
mmdp flow.mmd sequence.mmd arch.md
# Extracts ```mermaid blocks from markdown
mmdp README.md
Flags
| Flag | Default | Description |
|---|---|---|
-p, --port PORT |
auto | Server port |
-t, --theme THEME |
system | dark, light, or system |
-w, --no-watch |
false | Disable file watching |
--poll INTERVAL |
- | Stat-based polling (e.g. 500ms) |
--verbose |
false | Show informational messages on stderr |
-v, --version |
- | Print version |
-h, --help |
- | Print help |
Exit Codes
0— success1— argument error (bad flags, missing file)2— runtime error (port in use, read failure)
Output Format
Stdout (agent-consumable confirmation):
Previewing flowchart.mmd # new window opened
Previewing flowchart.mmd (reused) # existing window activated
Previewing stdin # stdin input
Stderr (structured diagnostics, --verbose for info messages):
mmdp: listening on http://127.0.0.1:52341 (flow.mmd) # --verbose only
mmdp: shutting down
mmdp: error: <message> # exit code 1 or 2
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.
- 2mo ago First seen · 141 lines · 1,301 tokens per session scan A 44bd3d9e8a25
mmdp CLAUDE.md is an instructions file published in the GitHub repository mxcoppell/mmdp (2 stars, last pushed 7mo ago), licensed MIT. It adds 1,301 tokens to every session, about $0.0052 per session on Opus 5.5. 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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