Borrowing it
Nothing to install: this file belongs to codecast-sh/codecast. 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/codecast-sh/codecast/main/AGENTS.mdgit clone --depth 1 https://github.com/codecast-sh/codecastWrote 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/codecast-sh/codecast/agents-md)<a href="https://agentmods.dev/instructions/codecast-sh/codecast/agents-md"><img src="https://agentmods.dev/badge/instructions/codecast-sh/codecast/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/codecast-sh/codecast/agents-md"><img src="https://agentmods.dev/badge/instructions/codecast-sh/codecast/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 | $0.07369 | $0.07369 |
| Opus 5.5 | $0.02948 | $0.02948 |
| Sonnet 5.5 | $0.01474 | $0.01474 |
| Haiku 4.5 | $0.00737 | $0.00737 |
Grade A, and why
codecast 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 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.
How it starts
The opening of the file, as written. The whole thing — 235 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Codecast
Working directory
Work directly in the main checkout. Other sessions may have uncommitted work in the tree — scan git status/git diff before editing shared files and never revert changes you didn't make.
Vendored platform packages
platform/packages/ is a GENERATED mirror of the shared @platform/* packages whose canonical home is ~/src/platform. Never edit it by hand: change the canonical copy, then run scripts/vendor-platform.sh to refresh the mirror (--check reports drift). The script also purges bun's node_modules/.bun/@platform+* copies and packages/web/node_modules/.vite and reinstalls, because bun keeps serving the stale copy and vite the stale module graph otherwise. A running dev server restarts itself when that cache disappears (plugins/depsCacheGuard.ts); never delete the cache under a live server without that plugin, or every dep it has not served yet answers 504 "Outdated Optimize Dep". The mirror exists because Railway, the CLI release workflow and the desktop build all run from a fresh clone, so every @platform dep must point inside the checkout (file:../../platform/packages/<name>), never at ~/src/platform. The package set is derived from the workspace package.json files, so adopting a new platform package is one dep line plus a rerun. A real vendor run also rewrites platform/package.json, the mirror's own workspace root generated from the canonical repo's root, platform/tsconfig.base.json, the base every mirrored tsconfig extends, and platform/vendor-manifest.txt, a content hash per mirrored package and of those root files; commit them with the mirror. CI cannot run --check, because a runner has no ~/src/platform, so the test-platform job runs --check-manifest instead: it re-hashes the mirror against that manifest and re-reads the dep lines the mirror was generated from, which catches a hand-edited mirror, a package adopted without a rerun, and a dep pointing outside the checkout. The same job runs scripts/vendor-platform.sh --test: it installs the mirror once as that workspace, the way the canonical repo installs, so a package's @platform peer resolves to its mirrored sibling rather than npm and the shared test tooling sits at the root; then it runs every mirrored package's own bun test and names each red one. The repo's own lockfile never sees the mirror's workspace.
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 Changed · +4 lines · +70 tokens per session 2eed7cb8c0a2
- 7d ago Changed · +24 lines · +604 tokens per session 7b00ddb43932
- 11d ago Changed · +17 tokens per session cd252deac5c5
- 14d ago Changed · -24 lines · -266 tokens per session 02517725a142
- 20d ago Changed · +4 tokens per session 6d6fe2732b38
- 21d ago Changed · +69 tokens per session b165852f41fe
- 23d ago Changed · +1 lines · +22 tokens per session 343f89e8fc3f
- 24d ago Changed · +1 lines · +26 tokens per session f2a09cf4c807
- 25d ago Changed · +48 lines · +933 tokens per session a8e4e5b6cbc0
- 1mo ago First seen · 181 lines · 5,890 tokens per session scan A 7167728ff63b
codecast AGENTS.md is an instructions file published in the GitHub repository codecast-sh/codecast (41 stars, last pushed today), licensed MIT. It adds 7,369 tokens to every session, about $0.0295 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 2026-09-07.
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.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.