Borrowing it
Nothing to install: this file belongs to codervisor/leanspec. 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/codervisor/leanspec/main/AGENTS.mdgit clone --depth 1 https://github.com/codervisor/leanspecWrote 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/codervisor/leanspec/agents-md)<a href="https://agentmods.dev/instructions/codervisor/leanspec/agents-md"><img src="https://agentmods.dev/badge/instructions/codervisor/leanspec/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/codervisor/leanspec/agents-md"><img src="https://agentmods.dev/badge/instructions/codervisor/leanspec/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 | $0.00984 | $0.00984 |
| Opus 5.5 | $0.00394 | $0.00394 |
| Sonnet 5.5 | $0.00197 | $0.00197 |
| Haiku 4.5 | $0.00098 | $0.00098 |
Grade A, and why
leanspec 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 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 — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AI Agent Instructions
Project: LeanSpec
Lightweight spec methodology for AI-powered development.
Skills
This project uses the Agent Skills framework for domain-specific guidance. Read the appropriate skill when working on related tasks.
Spec-driven development (GitHub-issue specs)
Lean-spec dogfoods its own SDD methodology with GitHub issues as the canonical spec medium. The specs/ directory is a frozen historical snapshot — new specs are GitHub issues on codervisor/leanspec. A pre-commit hook and CI job (freeze-specs) block additions/modifications under specs/; see specs/FROZEN.md.
-
leanspec-dev-process - End-to-end SDD loop (spec → branch → PR → merge)
- Location: .agents/skills/leanspec-dev-process/SKILL.md
- Use when: Starting non-trivial work, deciding spec-vs-trivial, picking branch name
- Key: No PR without a spec issue or
triviallabel
-
issue-spec - Create lean-spec style GitHub issue specs
- Location: .agents/skills/issue-spec/SKILL.md
- Use when: Asked to "spec this" or planning work that needs alignment
- Key: Body under ~2000 tokens; Overview / Design / Plan / Test / Provider impact / Alignment / Notes
-
leanspec-pre-push - Pre-push checks (sync main, typecheck, clippy, spec-link)
- Location: .agents/skills/leanspec-pre-push/SKILL.md
- Use when: About to
git push, hitting merge conflicts, "ready to push" - Key: CI tests a merge preview, not the branch alone — always sync main first
-
leanspec-pr-lifecycle - Manage PR post-push (CI triage, review, label flips, merge)
- Location: .agents/skills/leanspec-pr-lifecycle/SKILL.md
- Use when: CI is failing, review comments arrive, PR needs label flip, merge follow-through
- Key: Use
mcp__github__*for issue/PR mutation; neverghCLI for that
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 · 62 lines · 984 tokens per session scan A da59cedc9490
leanspec AGENTS.md is an instructions file published in the GitHub repository codervisor/leanspec (300 stars, last pushed 5mo ago), licensed MIT. It adds 984 tokens to every session, about $0.0039 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.
leanspec AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| leanspec AGENTS.mdcodervisor/leanspec | Instructions file | 300 | 5mo ago | MIT | A | 984 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |