Borrowing it
Nothing to install: this file belongs to toverux/cantrips. 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/toverux/cantrips/main/AGENTS.mdgit clone --depth 1 https://github.com/toverux/cantripsWrote 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/toverux/cantrips/agents-md)<a href="https://agentmods.dev/instructions/toverux/cantrips/agents-md"><img src="https://agentmods.dev/badge/instructions/toverux/cantrips/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/toverux/cantrips/agents-md"><img src="https://agentmods.dev/badge/instructions/toverux/cantrips/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 | $0.04142 | $0.04142 |
| Opus 5.5 | $0.01657 | $0.01657 |
| Sonnet 5.5 | $0.00828 | $0.00828 |
| Haiku 4.5 | $0.00414 | $0.00414 |
Grade A, and why
cantrips 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 yesterday.
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 — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Project overview
cantrips is a multi-harness (Claude Code + Codex) plugin of curated agent skills: the core engineering loop (/grilling → /spec → /tickets → /implement + /tdd → /simplify → /review-gate → /commit → /compound) plus its supporting skills.
A feature's spec and tickets are disposable working material under a gitignored .scratch/, deleted once the feature closes (docs/agents/cantrips-loop.md); what survives is the skills, git history, the decision records in docs/adr/, and the deferred ideas in IDEAS.md.
The repository is the plugin: the manifests, the skills tree, and the catalog files that publish it all sit at the root, and an install copies the whole checkout.
Everything else here (docs/, this file) therefore rides along into an install; keep it small and keep nothing secret in it.
There is no build
This repository is content, not code: no dependencies, no package manager, no build, no lint step, and no tests but those of the scripts skills ship, such as skills/review-gate/scripts/findings.test.ts over the script /review-gate reports through.
mise run test runs every such file under node --test with node 22.18 or later on PATH and nothing else installed.
Nothing needs installing to work on it, and nothing gates an edit: the tests are there to run when you touch a script, never a step an edit must pass.
The one mechanical convention is .editorconfig (LF, UTF-8, two-space indent, trailing newline, 100-column guide).
What tooling exists is convenience: mise.toml wraps the scripts in scripts/, mise run dev:sync-install mirroring the working tree over the local installs (Claude Code and Codex CLI) so unreleased edits are usable from other projects, and mise run dev:fork-diff reporting how far a fork has drifted from its upstream without ever asserting — it defines no expected state and exits zero whatever it finds.
Consequently the invariants below are honored by hand. Nothing fails when one drifts, so check them yourself whenever you touch the files they cover.
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.
- yesterday Changed · +1 lines · +67 tokens per session 8ab111a6167e
- 4d ago Changed · +6 lines · +324 tokens per session 59116068c899
- 10d ago Changed · +10 tokens per session ae0c2a0f8c2e
- 14d ago Changed · +1 lines · +22 tokens per session 5475aeb5f345
- 18d ago Changed · +6 lines · +435 tokens per session c388e23e73d0
- 1mo ago Changed · +4 lines · +181 tokens per session 10de77d3d36c
- 1mo ago Changed · +3 lines · +149 tokens per session 73cfb5101e5c
- 1mo ago First seen · 119 lines · 2,954 tokens per session scan A ed3591796bfa
cantrips AGENTS.md is an instructions file published in the GitHub repository toverux/cantrips (3 stars, last pushed yesterday), licensed MIT. It adds 4,142 tokens to every session, about $0.0166 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).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.