Gajae Code is an external coding-agent harness that works inside repositories or worktrees and guides an agent through planning, review, approval, and code changes. It is for developers who want to use an existing coding-plan subscription while controlling agent work from a terminal, phone, or bot. The catalogue entries provide extensions such as skills, agents, commands, plugins, and MCP integrations for the harness.
Borrowing it
Nothing to install: this file belongs to Yeachan-Heo/gajae-code. 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/Yeachan-Heo/gajae-code/main/AGENTS.mdgit clone --depth 1 https://github.com/Yeachan-Heo/gajae-codeWrote 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/yeachan-heo/gajae-code/agents-md)<a href="https://agentmods.dev/instructions/yeachan-heo/gajae-code/agents-md"><img src="https://agentmods.dev/badge/instructions/yeachan-heo/gajae-code/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/yeachan-heo/gajae-code/agents-md"><img src="https://agentmods.dev/badge/instructions/yeachan-heo/gajae-code/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 | $0.03146 | $0.03146 |
| Opus 5.5 | $0.01258 | $0.01258 |
| Sonnet 5.5 | $0.00629 | $0.00629 |
| Haiku 4.5 | $0.00315 | $0.00315 |
Grade A, and why
gajae-code AGENTS.md scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
| Spawn simple commands | Bun Shell (`$\`cmd\``) | `child_process` | How it starts
The opening of the file, as written. The whole thing — 207 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Gajae-Code Agent Contract
Gajae-Code (gjc) is a Bun-workspace TypeScript monorepo with Rust natives. This file is the repo-local operating contract: architecture map, dev utilities, and the rules that are not derivable from docs/. For deep dives, start at docs/ (per-topic) and docs/tools/ (per-tool runtime docs).
Architecture
Runtime is Bun (bun@<pinned in package.json>); everything runs from source via bun, and release binaries are compiled with packages/coding-agent/scripts/build-binary.ts.
Dependency direction (roughly bottom-up):
utils ─┬─▶ ai ─────┬─▶ agent ─▶ coding-agent (gjc CLI, primary product surface)
├─▶ tui ────┘ │
└─▶ natives (napi-rs ◀── crates/pi-natives)
└─▶ stats (dashboard), sdk surfaces
| Workspace | Role |
|---|---|
packages/coding-agent |
Main gjc CLI. Entry: src/cli.ts. Subsystems live in src/ (tools, tui, session, sdk, workflow, hooks, lsp, daemon, …). Unless stated otherwise, work targets this package. |
packages/agent |
Agent runtime: tool calling, state, orchestration. |
packages/ai |
Multi-provider LLM client with streaming. src/models.json is generated — never edit; regenerate via bun run generate-models. |
packages/tui |
Terminal UI library with differential rendering. |
packages/natives + packages/natives-<platform> |
napi-rs bindings over crates/pi-natives (text/image/grep/shell/pty). See docs/natives-*.md. |
packages/stats |
Local observability dashboard (gjc stats). |
packages/utils |
Shared utilities (@gajae-code/pi-utils): logger, isCompiledBinary, path/string helpers. |
packages/*-benchmark |
Edit / orchestration-token benchmarks; not shipped. |
crates/ |
Rust: pi-natives, pi-shell/brush-* (vendored shell), pi-ast, pi-iso, git-daemon, gjc-sdk. Driven via bun scripts/run-rs-task.ts. |
When the user says "agent" or asks why the agent behaves a certain way, they mean the coding-agent CLI implementation, not the assistant editing the repo.
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.
- 6d ago Changed · +2 lines · +92 tokens per session f0e00b7c9bd8
- 12d ago Changed · +1 lines · +32 tokens per session ea45f477bf21
- 28d ago Changed · +1 lines · -226 tokens per session cfe25bb5e161
- 1mo ago Changed · +1 lines · +107 tokens per session f0800117e0de
- 1mo ago Changed · +12 lines · +523 tokens per session a77204aacd78
- 1mo ago Changed · +3 tokens per session e378ac0ea95c
- 2mo ago First seen · 190 lines · 2,615 tokens per session scan A 3806eed07036
gajae-code AGENTS.md is an instructions file published in the GitHub repository Yeachan-Heo/gajae-code (3,033 stars, last pushed today), licensed MIT. It adds 3,146 tokens to every session, about $0.0126 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). 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.