Borrowing it
Nothing to install: this file belongs to webjsdev/webjs. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/webjsdev/webjs/main/AGENTS.mdgit clone --depth 1 https://github.com/webjsdev/webjsWrote 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/webjsdev/webjs/agents-md)<a href="https://agentmods.dev/instructions/webjsdev/webjs/agents-md"><img src="https://agentmods.dev/badge/instructions/webjsdev/webjs/agents-md/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/instructions/webjsdev/webjs/agents-md"><img src="https://agentmods.dev/badge/instructions/webjsdev/webjs/agents-md.svg" alt="Reviewed on agentmods" width="80" 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 | $0.31725 | $0.31725 |
| Opus 5.5 | $0.12690 | $0.12690 |
| Sonnet 5.5 | $0.06345 | $0.06345 |
| Haiku 4.5 | $0.03173 | $0.03173 |
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 12d 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 — 702 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.
- 12d ago Changed · +50 tokens per session 07e6072e7c3a
- 13d ago Changed · +5 lines · +1,011 tokens per session a91216bd4d10
- 14d ago Changed · +5 lines · +910 tokens per session 12ca9a8d506d
- 27d ago Changed · +24 tokens per session 711ef2a1ca56
- 1mo ago Changed · +37 tokens per session 5e9eaed6a7eb
- 1mo ago Changed · +1 lines · +874 tokens per session eaec7ec24205
- 1mo ago 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 (27 stars, last pushed 13d ago), licensed MIT. It adds 31,725 tokens to every session, about $0.1269 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 2026-08-30.
Other instructions, from other repositories
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).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
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