Borrowing it
Nothing to install: this file belongs to vincentkoc/tokenjuice. 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/vincentkoc/tokenjuice/main/AGENTS.mdgit clone --depth 1 https://github.com/vincentkoc/tokenjuiceWrote 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/vincentkoc/tokenjuice/agents-md)<a href="https://agentmods.dev/instructions/vincentkoc/tokenjuice/agents-md"><img src="https://agentmods.dev/badge/instructions/vincentkoc/tokenjuice/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/vincentkoc/tokenjuice/agents-md"><img src="https://agentmods.dev/badge/instructions/vincentkoc/tokenjuice/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 | $0.01548 | $0.01548 |
| Opus 5.5 | $0.00619 | $0.00619 |
| Sonnet 5.5 | $0.00310 | $0.00310 |
| Haiku 4.5 | $0.00155 | $0.00155 |
Grade A, and why
tokenjuice 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 — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Repository Guidelines
Project Structure & Module Organization
tokenjuice is a TypeScript CLI/library. Main source lives in src/:
src/cli/contains the CLI entrypoint.src/core/contains shared reducers, rule loading, and other host-agnostic logic.src/hosts/contains host-specific integrations (codex/,claude-code/,cursor/,pi/,opencode/,openclaw/) plus shared hook helpers undershared/.src/rules/contains built-in JSON rules and fixtures.
Tests live in test/ and mirror the source layout (test/core/, test/hosts/, test/hosts/shared/). Supporting docs live in docs/, packaging files in packaging/, and utility scripts in scripts/. dist/, release/, and src/core/builtin-rules.generated.ts are generated outputs; do not hand-edit them.
Build, Test, and Development Commands
pnpm installinstalls dependencies.pnpm testruns the full Vitest suite and regenerates built-in rules first.pnpm typecheckruns TypeScript without emitting files.pnpm buildrebuildsdist/, Pi runtime output, and packaged rules.pnpm verifyis the pre-handoff gate: lint, circular-dep check (madge), typecheck, and the full Vitest suite.pnpm release:localruns the local release pipeline: tests, build, tarball, checksums, and Homebrew formula.pnpm exec vitest run test/hosts/codex.test.tsruns a focused test file during iteration.
For a quick smoke check after building, run node dist/cli/main.js --version.
Coding Style & Naming Conventions
Use TypeScript with ESM imports and explicit .js import suffixes in source files. Match the existing style:
- 2-space indentation
- named exports over default exports for library modules
- small, focused helpers in
src/core/ - descriptive test names using
describe/it
Keep generated files out of manual edits. If you change built-in rule data, rely on the existing scripts and test/build flows to regenerate derived output.
Host integrations
Every post-tool host adapter (codex, pi, opencode, openclaw) routes through the shared primitive compactBashResult in src/core/integrations/compact-bash-result.ts. New host behavior belongs in src/core/, not in an adapter. Pre-tool rewriters (claude-code, codebuddy, cursor, vscode-copilot) funnel commands through tokenjuice wrap and shared helpers in src/hosts/shared/pre-tool-wrap.ts. When adding or changing a host, see docs/integration-playbook.md for the install/doctor/uninstall checklist register the host in the CLI handler maps (src/cli/install-commands.ts, src/cli/uninstall-commands.ts, src/cli/doctor-commands.ts), update the supported-host lists in src/cli/main.ts, and add it to the transcript test in test/cli/host-commands.test.ts.
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 Changed · +88 tokens per session 53d1c90b5d52
- 1mo ago Changed · +63 tokens per session d32370556b8e
- 2mo ago First seen · 83 lines · 1,397 tokens per session scan A 357f4884a92f
tokenjuice AGENTS.md is an instructions file published in the GitHub repository vincentkoc/tokenjuice (527 stars, last pushed yesterday), licensed MIT. It adds 1,548 tokens to every session, about $0.0062 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.
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).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.