Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/jeffreytse/grimoire-core/agents-mdgit clone --depth 1 https://github.com/jeffreytse/grimoire-coreWrote 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/jeffreytse/grimoire-core/agents-md)<a href="https://agentmods.dev/instructions/jeffreytse/grimoire-core/agents-md"><img src="https://agentmods.dev/badge/instructions/jeffreytse/grimoire-core/agents-md.svg" alt="Measured on agentmods" 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 | $0.00805 | $0.00805 |
| Opus 5 | $0.00402 | $0.00402 |
| Sonnet 5 | $0.00161 | $0.00161 |
| Haiku 4.5 | $0.00081 | $0.00081 |
Grade A, and why
grimoire-core 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 4d 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.
Copies of this mod
2 near-identical copies found in the catalogue:
- grimoire-core GEMINI.md — 100% identical, 1 lines differ
- grimoire-core CLAUDE.md — 86% identical, 16 lines differ
How it starts
The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.
grimoire
Multi-domain skill collection for AI assistants. Skills work across Claude Code, Codex, Copilot, Gemini CLI, OpenCode, and more.
Skill Path Convention
All skill paths follow this pattern:
<domain>/<subdomain>/skills/<skill-name>/SKILL.md
If a task matches a skill, invoke it. Never implement directly when a skill applies.
Domains
| Domain | Sub-domains |
|---|---|
meta |
(flat — no sub-domains) |
engineering |
development, frontend, architecture, testing, reliability, devops, cloud, networking, security, data, ai, hardware, mobile, performance, project-management, product, documentation |
business |
strategy, operations, leadership, entrepreneurship, hr |
science |
biology, physics, chemistry, mathematics, earth-science, astronomy |
health |
fitness, nutrition, mental-health, sleep, medicine |
writing |
creative, technical, copywriting, academic, journalism |
design |
ui-ux, graphic, branding, motion, product |
marketing |
seo, content, social-media, paid-ads, growth, analytics |
finance |
personal-finance, investing, accounting, real-estate, corporate |
law |
contracts, ip, employment, privacy, corporate |
film |
cinematography, directing, editing, screenwriting, production |
music |
composition, production, mixing, theory, performance |
art |
drawing, painting, digital-art, illustration, color-theory |
sports |
training, coaching, nutrition, tactics, recovery |
psychology |
cognitive, behavioral, social, clinical, positive |
language |
learning, linguistics, translation, communication |
education |
curriculum, teaching, e-learning, assessment, learning-science |
cooking |
techniques, baking, flavor, nutrition, world-cuisine |
travel |
planning, budgeting, cultural, adventure |
home |
renovation, interior-design, gardening, organization, smart-home |
parenting |
infant, toddler, school-age, teen |
automotive |
maintenance, troubleshooting, buying, modifications, ev |
pets |
dogs, cats, training, nutrition, health |
fashion |
styling, wardrobe, design, sustainability, accessories |
environment |
sustainability, ecology, climate, energy, policy |
photography |
composition, lighting, editing, genres |
productivity |
time-management, habits, focus, goals, tools |
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.
- 4d ago First seen · 98 lines · 805 tokens per session scan A 8e94e2496dff
grimoire-core AGENTS.md is an instructions file published in the GitHub repository jeffreytse/grimoire-core (4 stars, last pushed 16d ago), licensed MIT. It adds 805 tokens to every session, about $0.0040 per session on Opus 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
Alex_Skill_Mall falsifiability-deadlines.instructions.md
Every new or edited brain artefact (instruction / skill / prompt / agent) must declare a specific falsification deadline — a literal date, an observable event, or count+time bound — not 'after N passes' or 'when conditions warrant'.
Alex_Skill_Mall lint-discipline.instructions.md
Fix lint always — if I edited a file, I own its lint state on exit, even for pre-existing findings.
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).
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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.