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/ihildy/opencode-synced/agents-mdgit clone --depth 1 https://github.com/iHildy/opencode-syncedWhat 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 | $0.00758 | $0.00758 |
| Opus 5 | $0.00379 | $0.00379 |
| Sonnet 5 | $0.00152 | $0.00152 |
| Haiku 4.5 | $0.00076 | $0.00076 |
Grade A, and why
opencode-synced 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 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 — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Build & Test Commands
- Build:
mise run buildorbun build ./src/index.ts --outdir dist --target bun - Test:
mise run testorbun test - Single Test:
bun test BackgroundTask.test.ts(use file glob pattern) - Watch Mode:
bun test --watch - Lint:
mise run lintorbun run lint(biome) - Fix Lint:
mise run lint:fixorbun run lint:fix(biome --write) - Format:
mise run formatorbun run format(biome format --write) - Check (Lint + Format):
bun run check(biome check --write)
PR & Commit Guidelines
- Conventional Commits: Use conventional commit messages (e.g.,
fix:,feat:,chore:,docs:,refactor:,test:,revert:). - PR Titles: PR titles MUST follow conventional commit format (e.g.,
fix: descriptive title). This is enforced by GitHub checks. - Workflow: Run
bun run checkandbun run testbefore creating a PR.
Code Style Guidelines
Imports & Module System
- Use ES6
import/exportsyntax (module: "ESNext", type: "module") - Group imports: external libraries first, then internal modules
- Use explicit file extensions (
.js) for internal imports
Formatting (Biome)
- Single quotes (
quoteStyle: 'single') - Line width: 100 characters
- Tab width: 2 spaces (indentStyle: 'space')
- Trailing commas: ES5 (no trailing commas in function parameters)
- Semicolons: enabled
TypeScript & Naming
- NeverNesters: avoid deeply nested structures. Always exit early.
- Strict mode: enforced (
"strict": true) - Classes: PascalCase (e.g.,
BackgroundTask,BackgroundTaskManager) - Methods/properties: camelCase
- Status strings: use union types (e.g.,
'pending' | 'running' | 'completed' | 'failed' | 'cancelled') - Explicit types: prefer explicit type annotations over inference
- Return types: optional (not required but recommended for public methods)
Error Handling
- Check error type before accessing error properties:
error instanceof Error ? error.toString() : String(error) - Log errors with
[ERROR]prefix for consistency - Always provide error context when recording output
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 First seen · 73 lines · 758 tokens per session scan A e1707a1993ae
opencode-synced AGENTS.md is an instructions file published in the GitHub repository iHildy/opencode-synced (149 stars, last pushed 2d ago), licensed MIT. It adds 758 tokens to every session, about $0.0038 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
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
buildNext
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
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, applying the notice (cutover) and fallback chain (never fail the build).
spec-kit AGENTS.md
Instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
langchain 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.