Borrowing it
Nothing to install: this file belongs to Adancurusul/serial-mcp-server. 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/Adancurusul/serial-mcp-server/main/CLAUDE.mdgit clone --depth 1 https://github.com/Adancurusul/serial-mcp-serverWrote 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/adancurusul/serial-mcp-server/claude-md)<a href="https://agentmods.dev/instructions/adancurusul/serial-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/adancurusul/serial-mcp-server/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/adancurusul/serial-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/adancurusul/serial-mcp-server/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 | $0.00687 | $0.00687 |
| Opus 5.5 | $0.00275 | $0.00275 |
| Sonnet 5.5 | $0.00137 | $0.00137 |
| Haiku 4.5 | $0.00069 | $0.00069 |
Grade A, and why
serial-mcp-server 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 1mo 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 — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This repository provides a Rust MCP stdio server and one-shot CLI for serial port communication.
Development Rules
- Keep
mainreleasable. - Prefer small, reviewable changes with matching tests and documentation.
- Preserve CLI stdout for command data and JSON output. Send diagnostics to stderr.
- Do not claim hardware validation unless a command was run against a real connected device and produced evidence.
- Keep generated build output such as
target/out of commits.
Quality Gates
cargo fmt --all -- --check
cargo clippy --locked --all-targets --all-features -- -D warnings
cargo test --locked --all-targets --all-features
cargo doc --locked --all-features --no-deps
Build And Run
cargo build --release
cargo run --locked -- --help
cargo run --locked -- serve --help
cargo run --locked -- list-ports --json
MCP server mode:
cargo run --locked -- serve
No-subcommand startup remains compatible with old MCP stdio configurations, but new docs and client configs should use serve.
Config commands:
cargo run --locked -- generate-config
cargo run --locked -- validate-config --config path/to/config.toml
cargo run --locked -- show-config --config path/to/config.toml
CLI Surface
The CLI is the preferred automation surface for scripts, CI, and skills:
serial-mcp-server list-ports --json
serial-mcp-server probe --port <port> --baud 115200 --json
serial-mcp-server write --port <port> --baud 115200 --data H --read --timeout-ms 1000 --json
serial-mcp-server read --port <port> --baud 115200 --timeout-ms 1000 --json
serial-mcp-server set-control-lines --port <port> --rts high --dtr low --json
stdout is data only. Diagnostics and logs go to stderr or a configured log file.
Architecture
serial-mcp-server is a Rust MCP stdio server and one-shot CLI for serial port communication.
src/main.rs: argument parsing, logging setup, command dispatch, MCP server startup.src/config.rs: clap arguments, subcommands, TOML config, validation.src/cli.rs: one-shot CLI command execution.src/tools/serial_handler.rs: MCP tool handler and six MCP tools.src/serial/**: serial connection wrapper, connection manager, port listing.src/session/**: session abstractions used by supporting APIs and tests.skills/serial-debug/**: Codex and Claude Code compatible skill, CLI-first with MCP optional.
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.
- 1mo ago First seen · 89 lines · 687 tokens per session scan A d97ac709a82d
serial-mcp-server CLAUDE.md is an instructions file published in the GitHub repository Adancurusul/serial-mcp-server (95 stars, last pushed 3mo ago), licensed MIT. It adds 687 tokens to every session, about $0.0027 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 2026-08-30.
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