agentmods.dev

linux-mcp-server AGENTS.md

Project-specific instructions for a read-only MCP server that diagnoses Linux systems. They cover its tools, project layout, testing, code rules, and security requirements.

In plain words
What is it for?
Working on tools that inspect Linux logs, networks, processes, services, storage, and system information, then running the required checks.
Why use it?
They give a coding agent the repository knowledge and safety rules needed to change or add diagnostic tools correctly.

Instructions file for CodexOpenCode

0 4mo ago A scan 471 tokens fork Apache-2.0
View the source file r0x0d/linux-mcp-server
Install

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.

agentmods
npx agentmods add instructions/r0x0d/linux-mcp-server/agents-md
Clone the repo
git clone --depth 1 https://github.com/r0x0d/linux-mcp-server

Made for: Codex, OpenCode.

Per session 471 This file is loaded in full into every session.
When invoked 471 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin fork From a forked repository.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00471 $0.00471
Opus 5 $0.00235 $0.00235
Sonnet 5 $0.00094 $0.00094
Haiku 4.5 $0.00047 $0.00047

Measured 2d ago against content hash b09bb51d9826, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

linux-mcp-server AGENTS.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 2d 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.

AGENTS.md · 55 lines

What it actually says

Linux MCP Server

Read-only MCP server for Linux system diagnostics.

Commands

uv sync                      # Install dependencies
uv run pytest                # Run tests
uv run ruff check src tests  # Lint
uv run pyright               # Type check
make verify                  # All checks (required before commit)

Project Layout

  • src/linux_mcp_server/tools/ - MCP tools (logs, network, processes, services, storage, system_info)
  • src/linux_mcp_server/commands.py - Command definitions
  • src/linux_mcp_server/formatters.py / parsers.py - Output formatting and parsing
  • tests/ - Mirrors src structure

Rules

Code: PEP 8, type hints required, async/await for I/O, 120 char max, prefer Pydantic over dataclasses

Testing:

  • Run make verify before committing
  • Use parameterized tests and fixtures (shared fixtures go in conftest.py)
  • Use autospec=True when patching; spec=<object> with MagicMock
  • 100% patch coverage for new code

Security (Critical):

  • All tools must be read-only with readOnlyHint=True
  • Validate all input, use allowlists for file paths, sanitize shell params

Adding Tools

  1. Create tool in src/linux_mcp_server/tools/ using @mcp.tool(), @log_tool_call, @disallow_local_execution_in_containers decorators
  2. Register command in commands.py
  3. Write tests in tests/tools/

See src/linux_mcp_server/tools/processes.py for reference.

Commits & PRs

Use Conventional Commits: <type>(<scope>): <subject>

Types: feat, fix, docs, test, refactor, perf, chore

PRs must be small and focused - one logical change per PR. Split large changes into incremental PRs.

Docs

Full details: docs/contributing.md | Architecture: docs/architecture.md | API: docs/api/

Changes

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.

  1. 2d ago First seen · 55 lines · 471 tokens per session scan A b09bb51d9826

Subscribe to this mod's changes

linux-mcp-server AGENTS.md is an instructions file published in the GitHub repository r0x0d/linux-mcp-server (0 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 471 tokens to every session, about $0.0024 per session on Opus 5. A static security scan graded it A with 0 findings. It comes from a forked repository.

Debugging
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