Borrowing it
Nothing to install: this file belongs to elanthus/agentic-preflight. 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/elanthus/agentic-preflight/main/AGENTS.mdgit clone --depth 1 https://github.com/elanthus/agentic-preflightWrote 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/elanthus/agentic-preflight/agents-md)<a href="https://agentmods.dev/instructions/elanthus/agentic-preflight/agents-md"><img src="https://agentmods.dev/badge/instructions/elanthus/agentic-preflight/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/elanthus/agentic-preflight/agents-md"><img src="https://agentmods.dev/badge/instructions/elanthus/agentic-preflight/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 | $0.00807 | $0.00807 |
| Opus 5.5 | $0.00323 | $0.00323 |
| Sonnet 5.5 | $0.00161 | $0.00161 |
| Haiku 4.5 | $0.00081 | $0.00081 |
Grade A, and why
agentic-preflight 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.
How it starts
The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Contributor guidance
This file describes how to work in the Agentic Preflight repository. Human contributors should also read CONTRIBUTING.md.
Setup
Install uv and Git 2.38 or newer, then install the development environment:
uv sync --group dev
Checks
Run all four before reporting a change as done:
uv run ruff check .
uv run ruff format --check .
uv run mypy
uv run pytest -q
The test suite creates temporary Git repositories, so it needs a working git binary and
can take a few minutes.
Approval readiness
See docs/maintainers/approval-readiness.md.
Layout
agentic_preflight/: the package. Top-level modules hold configuration (config.py), the state machine (machine.py), the run store (store.py), Git helpers (gitx.py), context grounding (grounding.py), the pre-push hook (hook.py), and the CLI (cli.pyplus thecli_*.pycommand families).agentic_preflight/runs/: run lifecycle application code, includingstart.py, review, stages, merge-back, and the publish gate.agentic_preflight/stages/: the docs, lint, and test stage implementations and change scope detection.- There is no templates directory.
agentic_preflight/initcmd.pywrites the starter configuration and the pre-push hook;agentic_preflight/stages/docs.pyholds the documentation surface and CI-configuration path rules. tests/: pytest suite.tests/driver.pyandtests/conftest.pyhold shared fixtures.evals/: the regression eval runner and its cases; seeevals/README.md.docs/: user and design documentation, including ADRs underdocs/adr/.tools/: release tooling such astools/changelog.py, which assembles changelog fragments.scripts/: CI helper scripts such asscripts/smoke-wheel.sh.skill/: the agent skill (SKILL.md) and its reference files underskill/reference/.
Docs that change with code
Update documentation in the same commit as the code it describes:
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.
- 2d ago Changed · -28 lines · -417 tokens per session scan C → A 924ed17fbd0f
- 7d ago Changed · +6 lines · +112 tokens per session 50e89a2764a0
- 8d ago Changed · +9 tokens per session d98e17e41a61
- 9d ago Changed · +7 lines · +107 tokens per session 228ad8d9b162
- 16d ago Changed · -1 lines · -12 tokens per session fc4e29c65802
- 18d ago Changed · +8 lines · +144 tokens per session 9b6f97489795
- 19d ago Changed · +17 lines · +192 tokens per session scan A → C 20cf4aa75818
- 21d ago Changed · +5 lines · +120 tokens per session 0867a3e5ff66
- 1mo ago Changed · +45 lines · +411 tokens per session 7429a3460aac
- 2mo ago First seen · 13 lines · 141 tokens per session scan A b9f8f9924db5
agentic-preflight AGENTS.md is an instructions file published in the GitHub repository elanthus/agentic-preflight (2 stars, last pushed yesterday), licensed Apache-2.0. It adds 807 tokens to every session, about $0.0032 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.