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/webjsdev/webjs/agents-mdgit clone --depth 1 https://github.com/webjsdev/webjsWhat 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 | $0.28819 | $0.28819 |
| Opus 5 | $0.14410 | $0.14410 |
| Sonnet 5 | $0.05764 | $0.05764 |
| Haiku 4.5 | $0.02882 | $0.02882 |
Grade A, and why
webjs 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 — 691 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md for WebJs
This file is the contract for AI agents (and humans) editing a WebJs app. It describes file conventions, the public API, invariants to preserve, and recipes for common tasks. Keep it in sync whenever behaviour changes.
Detail docs, loaded when relevant. They don't auto-load. This file stays lean on purpose; anything marked "see the skill" has the full reference there.
The full reference is the skill at .agents/skills/webjs/SKILL.md, which routes
to these references/:
| Reference | Topic |
|---|---|
references/routing-and-pages.md |
Pages, layouts, dynamic routes, route handlers, metadata, redirects, 404s |
references/components.md |
Writing components: what a component owns, reactive props, signals, lifecycle, light vs shadow DOM, inherited members not to shadow |
references/data-and-actions.md |
Server actions, mutations, queries, validation, the ActionResult envelope, Drizzle surface, where server-derived types live |
references/auth-and-sessions.md |
Sessions, login flows, route protection, forbidden() / unauthorized() |
references/styling.md |
Tailwind, light-DOM tag-prefix rule, tokens, fixed headers, no-reflow layout |
references/client-router-and-streaming.md |
Client router, prefetch, frames, view transitions, Suspense streaming |
references/optimistic-ui.md |
Optimistic UI for a user-facing mutation |
references/typescript.md |
TypeScript at runtime, erasable syntax, full-stack types, the derive-the-type rule (never unknown / any) |
references/testing.md |
Unit, browser, e2e tests, the handle() harness, Bun parity |
references/built-ins.md |
Auth, caching, env vars, rate limit, file storage, the webjs config block |
references/runtime.md |
Node vs Bun, running the app, deploying, runtime-specific differences |
references/service-worker.md |
Offline support, an asset cache, the opt-in service worker |
references/module-structure.md |
Module size (target 800, ceiling around 1000), SOLID / DRY / KISS as judgment, and the procedure for barrelling a large module into a directory |
references/muscle-memory-gotchas.md |
READ FIRST when writing components or routes. Next.js / Lit patterns that break WebJs, with the webjs-shaped fix for each |
Repo-root framework-dev.md covers monorepo dev (only when editing WebJs
itself): commands, repo-health git config, changelog flow, dev error overlay.
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 First seen · 691 lines · 28,819 tokens per session scan A 842afc75d6f3
webjs AGENTS.md is an instructions file published in the GitHub repository webjsdev/webjs (109 stars, last pushed 10d ago), licensed MIT. It adds 28,819 tokens to every session, about $0.1441 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
bun AGENTS.md
AGENTS.md instructions for oven-sh/bun, a project described as: Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one.
bun CLAUDE.md
Claude Code instructions for oven-sh/bun, covering building and running bun, build commands, changes that don't require a build, testing and running tests.
bread CLAUDE.md
Instructions for tjakoen/bread, covering claude.md — start here, what this is, start here (reading order), this repo is the stack's control plane — run it and non-negotiables (see conventions for the full rules).
pag-extract AGENTS.md
Instructions for Steffen025/pag-extract, covering instructions for ai agents, where your instructions live, what this repository is, the task users will ask you for and how to do it.
pag-extract copilot-instructions.md
Instructions for Steffen025/pag-extract, covering github copilot — instructions for this repository and copilot-specific notes.
pag-extract CLAUDE.md
Instructions for Steffen025/pag-extract: The instructions for this repository live in AGENTS.md. Read that file.