Borrowing it
Nothing to install: this file belongs to rigortype/rigor. 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/rigortype/rigor/master/AGENTS.mdgit clone --depth 1 https://github.com/rigortype/rigorWrote 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/rigortype/rigor/agents-md)<a href="https://agentmods.dev/instructions/rigortype/rigor/agents-md"><img src="https://agentmods.dev/badge/instructions/rigortype/rigor/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/rigortype/rigor/agents-md"><img src="https://agentmods.dev/badge/instructions/rigortype/rigor/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 | $0.02076 | $0.02076 |
| Opus 5.5 | $0.00830 | $0.00830 |
| Sonnet 5.5 | $0.00415 | $0.00415 |
| Haiku 4.5 | $0.00208 | $0.00208 |
Grade A, and why
rigor 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 11d 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 — 154 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Agent contract for Rigor. Project-authored docs are written in English; vendored and submodule docs are upstream material and stay upstream.
Operating rules
Read the pointer that matches the task; a typo fix does not require a repository tour. For a change request, finish at the observable outcome requested, including its matching validation and handoff, rather than stopping at the first plausible edit.
Development Environment
Run every development command through the Nix Flake:
nix develop --command <cmd>
Nix must have the nix-command and flakes experimental features enabled, once per machine. The
Determinate Systems installer enables both; otherwise add this line to ~/.config/nix/nix.conf
(on NixOS or nix-darwin, set nix.settings.experimental-features instead):
extra-experimental-features = nix-command flakes
Where that is not set, insert --extra-experimental-features 'nix-command flakes' after nix. Use an
interactive nix develop shell when useful. The Flake owns Ruby 4.0.5 and the vendored
vendor/bundle; make setup is the first-time setup. For isolated work, read
rigor-worktree. CI is the exception: it installs Ruby
with ruby/setup-ruby and runs the targets make verify chains, plus further acceptance gates. Shell
traps that fail silently (zsh, grep -q under pipefail) are in
measurement.md § "Shell commands that answer wrong silently".
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.
- 11d ago First seen · 154 lines · 2,076 tokens per session scan A d0b748d0a880
rigor AGENTS.md is an instructions file published in the GitHub repository rigortype/rigor (107 stars, last pushed today), licensed MPL-2.0. It adds 2,076 tokens to every session, about $0.0083 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 2026-10-26.
rigor AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| rigor AGENTS.mdrigortype/rigor | Instructions file | 107 | today | MPL-2.0 | A | 2,076 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | 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 | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |