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/gemini-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/gemini-md)<a href="https://agentmods.dev/instructions/jeffreytse/grimoire-core/gemini-md"><img src="https://agentmods.dev/badge/instructions/jeffreytse/grimoire-core/gemini-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 5.1 | $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 GEMINI.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 5d 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.
This is a copy
100% identical to grimoire-core AGENTS.md — 1 line differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 99 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.
- 5d ago First seen · 99 lines · 805 tokens per session scan A 6972c3bf3514
grimoire-core GEMINI.md is an instructions file published in the GitHub repository jeffreytse/grimoire-core (4 stars, last pushed 17d 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. It is 100% identical to grimoire-core AGENTS.md, differing in 1 line, and is treated as a copy.
Other instructions, from other repositories
Alex_Skill_Mall severity-tagged-commits.instructions.md
Every commit touching brain artefacts (instructions / skills / prompts / agents / config / docs/ledgers / HANDOFF) must carry a severity tag in the commit subject: [typo | clarification | behaviour | constitutional]. [behaviour] and [constitutional] require an ACT pass before commit.
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 terminal-command-safety.instructions.md
Prevent terminal command failures from shell metacharacter interpretation, output capture issues, and hanging commands.
Alex_Skill_Mall copilot-instructions.md
Copilot instructions for fabioc-aloha/Alex_Skill_Mall, covering alex plugin mall: identity, mission, what the mall is, duty stack and cardinal rules.
Alex_Skill_Mall act-pass.instructions.md
Run the 7-step ACT pass on medium and high stakes work — Materiality first, then Hypothesise, Alternatives, Disconfirmers, Audit-priors, Severity, Commit.
Alex_Skill_Mall mall-maintenance-rules.instructions.md
Always-on routing for Mall maintenance work — fires the right Mall skill at the right moment. Distinguishes Mall-owned automation from out-of-scope editorial work.