What is git-mcp-server AGENTS.md?

Repository instructions for developing git-mcp-server, a local service that gives an AI agent 29 Git tools for working with code repositories.

Use them when changing, testing, packaging, or validating the git-mcp-server project.

They document the project's tests, linting, architecture rules, path checks, and precautions for destructive Git actions.

How jesspig/git-mcp-server configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to jesspig/git-mcp-server. 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/jesspig/git-mcp-server/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/jesspig/git-mcp-server

Made for: Codex, OpenCode.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/jesspig/git-mcp-server/agents-md/github.svg)](https://agentmods.dev/instructions/jesspig/git-mcp-server/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/jesspig/git-mcp-server/agents-md"><img src="https://agentmods.dev/badge/instructions/jesspig/git-mcp-server/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/jesspig/git-mcp-server/agents-md"><img src="https://agentmods.dev/badge/instructions/jesspig/git-mcp-server/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,480 This file is loaded in full into every session.

When invoked 1,480 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.

Model	Per session	Once invoked
Fable 5.1	$0.01480	$0.01480
Opus 5.5	$0.00592	$0.00592
Sonnet 5.5	$0.00296	$0.00296
Haiku 4.5	$0.00148	$0.00148

Measured 2mo ago against content hash bcb7c7609ee6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

git-mcp-server 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 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.

AGENTS.md · 66 lines

How it starts

The opening of the file, as written. The whole thing — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

项目定位

本地 Git MCP 服务器（stdio 传输）：29 个 git 工具经 GitPython 暴露为 MCP 工具，返回文本结果。不发布 PyPI，入口 [project.scripts] git-mcp-server = "main:main"。工具清单见 schemas.TOOL_MODELS（用户已确认工具范围，勿增减）。

开发命令

全量测试：uv run pytest tests -q（164 个，约 2.5 分钟）
单模块：uv run pytest tests/test_branch.py -q
lint：uv run ruff check .（零告警为验收标准）
启动验证：uvx --from . git-mcp-server（.opencode/opencode.json 已以此方式自举接入本仓库）

架构关键点（易踩坑）

非包结构：所有模块为顶层 .py（setuptools py-modules）。新增 .py 必须同步 pyproject.toml 的 py-modules 列表，否则打包丢失
注册表驱动：schemas.py 的 TOOL_MODELS 是工具权威清单，server.py 用 getattr(tools, name) 分发。新增/改名工具必须同步 3 处：TOOL_MODELS + tools.py 聚合 re-export + server.py 顶部 READONLY_TOOLS/DESTRUCTIVE_TOOLS 注解集合
docstring 第一段 = MCP 工具描述：server.py _tool_description 取 doc.strip().split("\n\n")[0]。工具 docstring 第一段必须自包含：摘要 + Best for: + Returns: + 提示，段内用换行不用空行；空行后的 Args 等不进 MCP 描述
路径校验分流（server.py call_tool）：git_init/git_clone 走 validate_target_path（目标可不存在）；git_worktree（add/remove 且带 worktree_path）额外走 validate_target_path(worktree_path)；其余含 repo_path 的工具走 validate_repo_path（要求存在）。GIT_MCP_ALLOWED_DIRS 未设置时回退服务器工作目录为隐式沙箱
repo_path 默认：所有工具 repo_path/local_path 默认 "."（服务器工作目录），agent 可省略
破坏性工具 preview 两阶段：git_reset/git_checkout（force）/git_clean 支持 preview（或 dry_run）先行查看影响，confirmed=True 才执行；preview 优先于 confirmed（预览不执行、不要求 confirmed）
错误约定：工具抛 ValueError（消息英文，四要素：事实·位置·期望）；server 层统一转 is_error：ValueError/ValidationError 原样文本、GitError/OSError 加 Git operation failed: 前缀、兜底 Unexpected error: ...。禁止让未捕获异常击穿连接
空目录校验：git_init/git_clone/git_worktree 统一走 security.prepare_dir(path_str, what, create)（create=True 时自动 mkdir，False 时缺失即通过）
detached HEAD：repo.head.ref 在 detached 时抛 TypeError，须用 repo.head.is_detached 判断（git_branch 已示范）

破坏性确认（confirmed 参数）

8 个工具带 confirmed 参数，未传 True 时抛 ValueError：

工具	条件
git_clean	必需（`dry_run=True` 预览可免；无 `force` 参数）
git_reset	必需
git_branch	delete 时
git_tag	delete 时
git_stash	drop 时
git_worktree	remove 时
git_push	force=True 时
git_checkout	force=True 时

Read the full file on GitHub · 66 lines

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.

2mo ago First seen · 66 lines · 1,480 tokens per session scan A bcb7c7609ee6

Subscribe to this mod's changes

git-mcp-server AGENTS.md is an instructions file published in the GitHub repository jesspig/git-mcp-server (0 stars, last pushed 3mo ago), licensed MIT. It adds 1,480 tokens to every session, about $0.0059 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 2026-08-31.

Git and workflow

git-mcp-server AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
git-mcp-server AGENTS.mdjesspig/git-mcp-server	Instructions file	0	3mo ago	MIT	A	1,480	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

git-mcp-server: Instructions file for Codex