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 skills add grimoire-rs/grimoire --skill ai-config-authoringgit clone --depth 1 https://github.com/grimoire-rs/grimoireWrote 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/skills/grimoire-rs/grimoire/ai-config-authoring)<a href="https://agentmods.dev/skills/grimoire-rs/grimoire/ai-config-authoring"><img src="https://agentmods.dev/badge/skills/grimoire-rs/grimoire/ai-config-authoring/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/skills/grimoire-rs/grimoire/ai-config-authoring"><img src="https://agentmods.dev/badge/skills/grimoire-rs/grimoire/ai-config-authoring.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00077 | $0.01765 |
| Opus 5.5 | $0.00031 | $0.00706 |
| Sonnet 5.5 | $0.00015 | $0.00353 |
| Haiku 4.5 | $0.00008 | $0.00177 |
Grade A, and why
ai-config-authoring 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 2d 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 — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AI Config Authoring
Core Principle: Context Is a Budget
Every always-loaded line competes with the user's actual task for model attention, and attention degrades as volume grows — bloated config makes agents ignore the instructions that matter. Pay the always-on price only for content needed every session; defer everything else behind on-demand loading (progressive disclosure). For each line, apply the deletion test: would removing it cause mistakes? If not, cut it.
Budget Table
| Artifact | Budget | Cost is paid |
|---|---|---|
| Always-on instruction file | < 200 lines | Every session, every turn |
| Glob-scoped rule | < 200 lines each | Only while matching files are in play |
| Skill metadata (name + description) | ~100 tokens per skill | Every session, all skills |
| Skill body (SKILL.md) | < 500 lines / < 5k tokens | Only when the skill triggers |
| Skill bundled files | Effectively unlimited | Only when read or executed |
| Subagent | Isolated window | Separate budget; only its summary returns |
| Hook | Zero context | Never — scripts run outside the context |
The Artifact-Type Landscape
The first matching row picks the type. Full comparison — vendor support, failure modes, migration paths — in references/choosing-types.md.
| The content is... | Use |
|---|---|
| Mechanical, must happen 100% of the time, no judgment | Hook |
| Identity, commands, conventions relevant to every task | Always-on instruction file |
| A standard that applies while editing certain files | Glob-scoped rule |
| An occasional procedure or piece of domain knowledge | Skill |
| A side-effectful workflow to run only on explicit request | Manual-only skill |
| Context-heavy research, parallel work, separate privileges | Subagent |
| Something that must port across clients | Skill — the only type every client hosts |
| Logic a machine can run rather than prose to read | Hook, or a script inside a skill |
Every row above is packageable — grim distributes skills, rules, subagents, MCP registrations, and now hooks as artifact kinds. That changes distribution, never portability: a hook still needs a lifecycle surface in the client to be written at all, so it reaches a narrow set (four clients today) where a skill reaches all of them. Details in references/choosing-types.md.
What ships with it
8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 2d ago Changed · +5 lines fe845f7c5038
- 21d ago Changed · +7 lines 75bf7b563aed
- 28d ago Changed c13809c54826
- 1mo ago First seen · 128 lines · 77 tokens per session scan A 929fd5fe1472
ai-config-authoring is a skill published in the GitHub repository grimoire-rs/grimoire (14 stars, last pushed today), licensed Apache-2.0. It adds 77 tokens to every session and 1,765 once invoked, about $0.0003 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.
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