Borrowing it
Nothing to install: this file belongs to sushiHex/hardline-mcp. 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/sushiHex/hardline-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/sushiHex/hardline-mcpWrote 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/sushihex/hardline-mcp/agents-md)<a href="https://agentmods.dev/instructions/sushihex/hardline-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/sushihex/hardline-mcp/agents-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/sushihex/hardline-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/sushihex/hardline-mcp/agents-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 | $0.00670 | $0.00670 |
| Opus 5.5 | $0.00268 | $0.00268 |
| Sonnet 5.5 | $0.00134 | $0.00134 |
| Haiku 4.5 | $0.00067 | $0.00067 |
Grade A, and why
hardline-mcp 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 16d 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 — 41 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Repository Guidelines
Project Structure & Module Organization
hardline_mcp/contains the Python package:server.pywires MCP tools;mailbox.pyhandles SQLite messaging;adapters.pyinvokes agent CLIs;jobs.py,sessions.py, andprocid.pymanage dispatches and process identity.tests/contains unit, headless MCP integration, and optional live-agent tests; shared fixtures live inconftest.py.docs/architecture.mdexplains design decisions. ReadCLAUDE.mdfor development gotchas andREADME.mdfor configuration.TODO.mdtracks open work.pyproject.tomldefines packaging and dependencies;.github/workflows/ci.ymldefines CI. Build artifacts belong in ignoreddist/.
Build, Test, and Development Commands
Use Python 3.10+ in a virtual environment.
python -m pip install -e ".[dev]": install editable source, pytest and pytest-xdist.python -m pytest -q -rs -n auto: run the default suite in parallel and report skip reasons, matching CI.python -m pytest tests/test_mailbox.py -q: run a focused test module.python -m pip wheel --no-deps . -w dist: build a wheel using Hatchling.hardline-mcp: start the stdio MCP server; it waits for client input.
CI tests Python 3.10 and 3.14 on Ubuntu, Windows and macOS, runs the mutation catalog, and runs the live sandbox tests on Linux and macOS.
Coding Style & Naming Conventions
Follow existing Python style: four-space indentation, type annotations, descriptive docstrings, snake_case functions/modules, PascalCase classes, and UPPER_SNAKE_CASE constants. Keep MCP imports in server.py; offload blocking tool work through AnyIO worker threads. Specify subprocess text encodings for Windows compatibility. No formatter or linter is configured in project metadata or CI.
Testing Guidelines
Use pytest, with @pytest.mark.anyio for async tests. Name files test_*.py and functions test_<behavior>. Use tmp_path databases and monkeypatch; wait for background deliveries before fixture teardown.
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.
- 16d ago Changed · +29 tokens per session 7274ea60da7c
- 1mo ago First seen · 41 lines · 641 tokens per session scan A 31ae3058e353
hardline-mcp AGENTS.md is an instructions file published in the GitHub repository sushiHex/hardline-mcp (1 stars, last pushed 2d ago), licensed MIT. It adds 670 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 2026-09-10.
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