mini-swe-agent: Instructions file for GitHub Copilot

.github/copilot-instructions.md

mini-swe-agent copilot-instructions.md is an instructions file for GitHub Copilot from SWE-agent/mini-swe-agent. It costs 378 tokens per session, scanned A, original, MIT.

Python coding and testing instructions for SWE-agent and mini-swe-agent projects, covering style, project structure, and pytest practices.

In plain words
What is it for?
Use them when writing or reviewing Python 3.10+ code, adding typed functions, building Typer interfaces, handling files with pathlib, and creating pytest tests.
Why use it?
They give the coding agent consistent conventions, reducing unnecessary code and keeping changes compatible with the repository’s expectations.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is SWE-agent/mini-swe-agent's own configuration. It tells GitHub Copilot how to work on mini-swe-agent itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mini-swe-agent configures →

About the project

mini-swe-agent is a small AI software-engineering agent that works on GitHub issues or tasks from the command line by operating in a software environment. It is designed for coding-agent research and for developers who want a simple agent that can use different language models and execution environments. The catalogue entries provide instructions and agents for using or extending it.

SWE-agent/mini-swe-agent · 8,922 stars · on GitHub · mini-swe-agent.com

Reuse

Borrowing it

Nothing to install: this file belongs to SWE-agent/mini-swe-agent. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/SWE-agent/mini-swe-agent/main/.github/copilot-instructions.md
Clone the repo
git clone --depth 1 https://github.com/SWE-agent/mini-swe-agent

Made for: GitHub Copilot.

Wrote 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.

agentmods badge for mini-swe-agent copilot-instructions.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/swe-agent/mini-swe-agent/copilot-instructions/github.svg)](https://agentmods.dev/instructions/swe-agent/mini-swe-agent/copilot-instructions)
Your own site
<a href="https://agentmods.dev/instructions/swe-agent/mini-swe-agent/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/swe-agent/mini-swe-agent/copilot-instructions/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.

agentmods 80×15 button for mini-swe-agent copilot-instructions.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/swe-agent/mini-swe-agent/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/swe-agent/mini-swe-agent/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 378 This file is loaded in full into every session.
When invoked 378 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00378 $0.00378
Opus 5.5 $0.00151 $0.00151
Sonnet 5.5 $0.00076 $0.00076
Haiku 4.5 $0.00038 $0.00038

Measured 2mo ago against content hash 6a868fc1a4fd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mini-swe-agent 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 2mo 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.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

.github/copilot-instructions.md · 37 lines

What it actually says

Style guide

  1. Target python 3.10 or higher
  2. Use python with type annotations. Use list instead of List.
  3. Use pathlib instead of os.path. Use Path.read_text() over with ...open() constructs.
  4. Use typer to add interfaces
  5. Keep code comments to a minimum and only highlight particularly logically challenging things
  6. Do not append to the README unless specifically requested
  7. Use jinja for formatting templates
  8. Use dataclass for keeping track config
  9. Do not catch exceptions unless explicitly told to.
  10. Write concise, short, minimal code.
  11. Not every exception has to be caught. Exceptions are a good way to show problems to a user.
  12. This repository rewards minimal code. Try to be as concise as possible.
  13. Do NOT warn about print messages in tests, print statements in tests are OK!

Test style

  1. Use pytest, not unittest.
  2. Do not mock/patch anything that you're not explicitly asked to do
  3. Avoid writing trivial tests. Every test should test for at least one, preferably multiple points of failure
  4. Avoid splitting up code in multiple lines like this: a=func()\n assert a=b. Instead, just do assert func() == b
  5. The first argument to pytest.mark.parametrize should be a tuple (not a string! not a list!), the second argument must be a list (not a tuple!).
  6. Do NOT warn about print messages in tests, print statements in tests are OK!

Here's an example for rule 4:

# bad
result = func()
assert result == b

# good
assert func() == b
Changes

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.

  1. 2mo ago First seen · 37 lines · 378 tokens per session scan A 6a868fc1a4fd

Subscribe to this mod's changes

mini-swe-agent copilot-instructions.md is an instructions file published in the GitHub repository SWE-agent/mini-swe-agent (8,922 stars, last pushed 2d ago), licensed MIT. It adds 378 tokens to every session, about $0.0015 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.

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