oh-my-opencode-slim is a plugin that coordinates multiple specialized AI agents inside OpenCode, assigning codebase exploration, documentation research, architecture review, design, and implementation to different agents. It is for developers who want agent teams to divide and reconcile software-development work while mixing models from different providers. The catalogue entries are the plugin’s bundled agents, skills, and instruction.
Borrowing it
Nothing to install: this file belongs to alvinunreal/oh-my-opencode-slim. 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/alvinunreal/oh-my-opencode-slim/master/AGENTS.mdgit clone --depth 1 https://github.com/alvinunreal/oh-my-opencode-slimWrote 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/alvinunreal/oh-my-opencode-slim/agents-md)<a href="https://agentmods.dev/instructions/alvinunreal/oh-my-opencode-slim/agents-md"><img src="https://agentmods.dev/badge/instructions/alvinunreal/oh-my-opencode-slim/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/alvinunreal/oh-my-opencode-slim/agents-md"><img src="https://agentmods.dev/badge/instructions/alvinunreal/oh-my-opencode-slim/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 | $0.02713 | $0.02713 |
| Opus 5.5 | $0.01085 | $0.01085 |
| Sonnet 5.5 | $0.00543 | $0.00543 |
| Haiku 4.5 | $0.00271 | $0.00271 |
Grade A, and why
oh-my-opencode-slim 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 — 228 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Coding Guidelines
This document provides guidelines for AI agents operating in this repository.
Project Overview
oh-my-opencode-slim - A lightweight agent orchestration plugin for OpenCode, a slimmed-down fork of oh-my-opencode. Built with TypeScript, Bun, and Biome.
Design Constraints
oh-my-opencode-slim is a lightweight harness. Every change is reviewed against:
- Lightweight first — adopt the smallest implementation that meets the requirement; no speculative abstraction, redundant configuration, or unnecessary indirection.
- No duplicate design — when OpenCode v2 already owns a mechanism, reuse or observe it instead of building a parallel plugin-side state machine. Check the pinned host source under
.slim/clonedeps/repos/opencode/before adding plugin-side machinery. - One source of truth for tool instructions — tool usage lives in tool descriptions; never restate it in agent prompts. When prompt prose and a tool description overlap, deleting the prose is the preferred change.
- Model-facing bytes are a budget — prompts and tool descriptions are paid on every request, in every preset. Removal is the preferred change; an addition must state the behavior it buys, verified by rendering and counting, and must serve the cheapest supported preset, not just the dev default.
Commands
| Command | Description |
|---|---|
bun run build |
Build TypeScript to dist/ (both index.ts and cli/index.ts) |
bun run typecheck |
Run TypeScript type checking without emitting |
bun test |
Run all tests with Bun |
bun run lint |
Run Biome linter on entire codebase |
bun run format |
Format entire codebase with Biome |
bun run check |
Run Biome check with auto-fix (lint + format + organize imports) |
bun run check:ci |
Run Biome check without auto-fix (CI mode) |
bun run dev |
Build and run with OpenCode |
Running a single test: Use Bun's test filtering with the -t flag:
bun test -t "test-name-pattern"
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 Changed · +9 lines · +222 tokens per session 64a9d29d4e59
- 7d ago Changed · +16 tokens per session 672afc3df482
- 10d ago Changed · -1 tokens per session 25dbb2eb85fb
- 14d ago Changed · +13 lines · +157 tokens per session b558361485c3
- 24d ago Changed · +2 lines · +36 tokens per session f1fd0303523e
- 1mo ago Changed · +66 tokens per session 5b6f30e3f936
- 2mo ago First seen · 204 lines · 2,217 tokens per session scan A b8c41ed8e328
oh-my-opencode-slim AGENTS.md is an instructions file published in the GitHub repository alvinunreal/oh-my-opencode-slim (9,839 stars, last pushed 3d ago), licensed MIT. It adds 2,713 tokens to every session, about $0.0109 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.