Borrowing it
Nothing to install: this file belongs to wesammustafa/opencode-primer. 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/wesammustafa/opencode-primer/main/AGENTS.mdgit clone --depth 1 https://github.com/wesammustafa/opencode-primerWrote 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/wesammustafa/opencode-primer/agents-md)<a href="https://agentmods.dev/instructions/wesammustafa/opencode-primer/agents-md"><img src="https://agentmods.dev/badge/instructions/wesammustafa/opencode-primer/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/wesammustafa/opencode-primer/agents-md"><img src="https://agentmods.dev/badge/instructions/wesammustafa/opencode-primer/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 | $0.01646 | $0.01646 |
| Opus 5.5 | $0.00658 | $0.00658 |
| Sonnet 5.5 | $0.00329 | $0.00329 |
| Haiku 4.5 | $0.00165 | $0.00165 |
Grade A, and why
opencode-primer 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 1mo 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 — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Project instructions for OpenCode. Read every session.
What this repo is
A practical, opinionated guide to using OpenCode — README, supporting docs, drop-in agent prompts, MCP walkthroughs, and a worked example of a fully-configured .opencode/ directory. It's a documentation repository, not application code.
Repo layout
.
├── README.md # Main guide (the centerpiece)
├── AGENTS.md # This file
├── CONTRIBUTING.md # How to contribute
├── SECURITY.md · CODE_OF_CONDUCT.md
├── LICENSE # MIT
├── opencode.json · tui.json # Example configs with safe defaults
├── docs/
│ ├── quickstart.md # 5-minute getting-started
│ ├── zen.md # Zen model gateway details
│ ├── tui.md # TUI mastery
│ ├── agents.md # Custom agent deep dive
│ ├── commands.md # Custom slash commands
│ ├── skills.md # Agent skills
│ ├── plugins.md # Plugin/hook system
│ ├── mcp.md # MCP integration
│ ├── workflows.md # Real-world recipes
│ ├── migration.md # Migration from Claude Code / Cursor
│ └── reference/
│ ├── cli.md # All CLI commands
│ ├── slash-commands.md # All TUI slash commands
│ ├── permissions.md # Permission model
│ ├── changelog.md # OpenCode releases
│ ├── faq.md # FAQ + troubleshooting
│ └── further-reading.md # External resources
├── .opencode/
│ ├── agents/ # Example custom agents
│ ├── commands/ # Example custom commands
│ ├── plugins/ # Example plugins (audit log, secret blocker)
│ └── skills/ # Example agent skills
├── .github/ # CI (lint-docs.yml), issue/PR templates
├── mcp-servers/ # MCP server walkthroughs
├── specialized-agents/ # Drop-in specialist prompts
│ ├── system-prompts/ # System prompts (7 roles)
│ └── descriptions/ # Role descriptions
└── Images/ # Banner, diagrams, screenshots
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.
- 1mo ago First seen · 131 lines · 1,646 tokens per session scan A 45b9d91cdc27
opencode-primer AGENTS.md is an instructions file published in the GitHub repository wesammustafa/opencode-primer (403 stars, last pushed 3mo ago), licensed MIT. It adds 1,646 tokens to every session, about $0.0066 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).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.