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/foxhound87/mobx-formkit/agents-mdgit clone --depth 1 https://github.com/foxhound87/mobx-formkitWhat 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 | $0.07668 | $0.07668 |
| Opus 5 | $0.03834 | $0.03834 |
| Sonnet 5 | $0.01534 | $0.01534 |
| Haiku 4.5 | $0.00767 | $0.00767 |
Grade A, and why
mobx-formkit 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 3d 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 — 762 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Guide for AI Agents
A concise guide for LLMs working with MobX Formkit — the reactive MobX form state management library.
1. Project Identity
| Field | Value |
|---|---|
| Package | mobx-formkit |
| NPM | npmjs.com/package/mobx-formkit |
| GitHub | github.com/foxhound87/mobx-formkit |
| Docs | foxhound87.github.io/mobx-formkit |
| Version | 7.x (current: 7.1.0) |
| Size | ~8KB gzip (tree-shakeable) |
| License | MIT |
| Dependencies | MobX 5, 6 & 7 (peer: `^5.15.0 |
2. Philosophy
MobX Formkit is built on three core principles:
-
Reactive by default — Every field is a MobX observable. Form state (value, error, dirty, touched, etc.) is reactive. Your UI updates automatically with
observer()— no manualsetState, no change handlers to write. -
Composable by design — Fields nest infinitely (objects, arrays, arrays of arrays). Forms compose via
composer()for wizards and multi-step flows.ArrayMappreserves insertion order for dynamic lists. -
Plugin-driven validation — 8 validation drivers (DVR, VJF, AJV, YUP, JOI, ZOD, VALIBOT, VINEJS) share a uniform lifecycle. Swap or combine them without changing field definitions.
The result: you define your form structure declaratively, and reactivity, validation, change tracking, and UI bindings are automatic.
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.
- 3d ago First seen · 762 lines · 7,668 tokens per session scan A e775dcd013eb
mobx-formkit AGENTS.md is an instructions file published in the GitHub repository foxhound87/mobx-formkit (1,097 stars, last pushed 15d ago), licensed MIT. It adds 7,668 tokens to every session, about $0.0383 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 2026-08-30.
Other instructions, from other repositories
instructor CLAUDE.md
Claude Code instructions for 567-labs/instructor, covering claude.md, instructor development guide, commands, installation & setup and code style guidelines.
formkit CLAUDE.md
Instructions for formkit/formkit, covering formkit, architecture, packages, core (framework-agnostic) and vue integration.
react-seed AGENTS.md
Instructions for guokaigdg/react-seed, covering agents.md, 目录, 1. 项目概览, 2. 技术栈 and 3. 目录结构.
jsonschema CLAUDE.md
Instructions for kaptinlin/jsonschema, covering jsonschema, commands, agent operating rules, agent workflow and architecture.
klaudiush CLAUDE.md
Instructions for smykla-skalski/klaudiush, covering claude.md, project overview, commands, completion (shell completion scripts) and doctor (diagnose setup and configuration).
klaudiush copilot-instructions.md
Instructions for smykla-skalski/klaudiush, covering github copilot instructions, project overview, commands, build and development build (no signoff validation).