Goose is an open-source AI agent that runs on a computer as a desktop app, command-line tool, or API and can perform tasks beyond code completion. Developers and other users employ it for coding, research, writing, automation, and data analysis with different language-model providers and extensions. The catalogue add-ons define parts of its agent workflow and behavior.
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/aaif-goose/goose/copilot-instructionsgit clone --depth 1 https://github.com/aaif-goose/gooseWrote 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/aaif-goose/goose/copilot-instructions)<a href="https://agentmods.dev/instructions/aaif-goose/goose/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/aaif-goose/goose/copilot-instructions.svg" alt="Measured on agentmods" 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 | $0.01077 | $0.01077 |
| Opus 5 | $0.00539 | $0.00539 |
| Sonnet 5 | $0.00215 | $0.00215 |
| Haiku 4.5 | $0.00108 | $0.00108 |
Grade A, and why
goose copilot-instructions.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 5d 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 — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GitHub Copilot Code Review Instructions
Review Philosophy
- Only comment when you have HIGH CONFIDENCE (>80%) that an issue exists
- Be concise: one sentence per comment when possible
- Focus on actionable feedback, not observations
- When reviewing text, only comment on clarity issues if the text is genuinely confusing or could lead to errors. "Could be clearer" is not the same as "is confusing" - stay silent unless HIGH confidence it will cause problems
Priority Areas (Review These)
Security & Safety
- Unsafe code blocks without justification
- Command injection risks (shell commands, user input)
- Path traversal vulnerabilities
- Credential exposure or hardcoded secrets
- Missing input validation on external data
- Improper error handling that could leak sensitive info
Correctness Issues
- Logic errors that could cause panics or incorrect behavior
- Race conditions in async code
- Resource leaks (files, connections, memory)
- Off-by-one errors or boundary conditions
- Incorrect error propagation (using
unwrap()inappropriately) - Optional types that don't need to be optional
- Booleans that should default to false but are set as optional
- Error context that doesn't add useful information (e.g.,
.context("Failed to do X")when error already says it failed) - Overly defensive code that adds unnecessary checks
- Unnecessary comments that just restate what the code already shows (remove them)
Architecture & Patterns
- Code that violates existing patterns in the codebase
- Missing error handling (should use
anyhow::Result) - Async/await misuse or blocking operations in async contexts
- Improper trait implementations
No Doc Updates with Code Changes
- PRs with code changes shouldn't update
/documentation- docs deploy on merge, code on release. Useunlisted: trueor remove/hide docs.
Project-Specific Context
- This is a Rust project using cargo workspaces
- Core crates:
goose(agent logic and ACP server),goose-cli(CLI),goose-mcp(MCP servers) - Error handling: Use
anyhow::Result, notunwrap()in production code - Async runtime: tokio
- MCP protocol implementations require extra scrutiny
- Naming convention: In
documentation/docsanddocumentation/blog, always refer to the project as "goose" (lowercase), never "Goose" (even at the start of sentences)
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.
- 5d ago First seen · 102 lines · 1,077 tokens per session scan A dc8ca0a52b54
goose copilot-instructions.md is an instructions file published in the GitHub repository aaif-goose/goose (53,916 stars, last pushed today), licensed Apache-2.0. It adds 1,077 tokens to every session, about $0.0054 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
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Guidelines for creating high-quality Agent Skills for GitHub Copilot.
intelligent-terminal rust-localization.instructions.md
Instructions for microsoft/intelligent-terminal, covering localization instructions for rust wta (yaml locale files), file structure, file format, the en-us.yml source file and non-translatable token rules.
intelligent-terminal localization.instructions.md
Instructions for microsoft/intelligent-terminal, covering localization instructions for .resw resource files, components with localized resources, locale categories, authoritative locale list (from terminalapp) and adding or updating localized strings.
intelligent-terminal instructions.instructions.md
Guidelines for creating high-quality custom instruction files for GitHub Copilot.
intelligent-terminal rust.instructions.md
Concise Rust coding conventions for this repository.
cc-multi-cli-plugin AGENTS.md
Instructions for greenpolo/cc-multi-cli-plugin, covering agents.md, what this is, the golden rule, the request chain and build & test.