spec-kit: Instructions file for Claude Code

AGENTS.md

spec-kit AGENTS.md is an instructions file for Claude Code, Codex, OpenCode from doggy8088/spec-kit. It costs 4,094 tokens per session, scanned A, original, MIT.

Project instructions for GitHub Spec Kit and Specify, tools for specification-driven development—a method where the software plan is written clearly before implementation. They explain how to add support for AI coding assistants and keep their project files and commands consistent.

In plain words
What is it for?
Use them when maintaining Specify CLI, adding an AI coding tool, or working with generated agent-specific command files, folders, formats, and argument conventions.
Why use it?
They give contributors a shared process for changing Specify and adding new supported agents, including required version updates and changelog entries.

Instructions file for Claude CodeCodexOpenCode

Written for Claude Code and Codex and OpenCode: $ARGUMENTS substitution, but also the file is AGENTS.md. Also seen: reads .claude/ paths; mentions Claude Code; mentions AGENTS.md.

This is doggy8088/spec-kit's own configuration. It tells Claude Code, Codex and OpenCode how to work on spec-kit 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 spec-kit configures →

Reuse

Borrowing it

Nothing to install: this file belongs to doggy8088/spec-kit. 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/doggy8088/spec-kit/zh-tw/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/doggy8088/spec-kit

Made for: Claude Code, 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.

agentmods badge for spec-kit AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/doggy8088/spec-kit/agents-md/github.svg)](https://agentmods.dev/instructions/doggy8088/spec-kit/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/doggy8088/spec-kit/agents-md"><img src="https://agentmods.dev/badge/instructions/doggy8088/spec-kit/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.

agentmods 80×15 button for spec-kit AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/doggy8088/spec-kit/agents-md"><img src="https://agentmods.dev/badge/instructions/doggy8088/spec-kit/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 4,094 This file is loaded in full into every session.
When invoked 4,094 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 $0.04094 $0.04094
Opus 5.5 $0.01638 $0.01638
Sonnet 5.5 $0.00819 $0.00819
Haiku 4.5 $0.00409 $0.00409

Measured 1mo ago against content hash 2fbe8dbd73b3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

spec-kit 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.

AGENTS.md · 395 lines

How it starts

The opening of the file, as written. The whole thing — 395 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

關於 Spec Kit 與 Specify

GitHub Spec Kit 是一套完整的工具包,用於實踐 Spec-Driven Development(SDD,規格驅動開發)方法論——這是一種強調在實作前先建立明確規格的開發流程。此工具包包含範本、腳本與工作流程,協助開發團隊以結構化方式進行軟體建置。

Specify CLI 是用於專案初始化的命令列介面(Command Line Interface),可透過 Spec Kit 框架快速建立專案。它會設定必要的目錄結構、範本,以及 AI agent 整合,全面支援 Spec-Driven Development 的工作流程。

此工具包支援多種 AI 程式設計輔助工具(AI coding assistants),讓團隊能依偏好選擇工具,同時維持一致的專案結構與開發實踐。


一般實務

  • 任何對 __init__.py 的 Specify CLI 變更,都必須在 pyproject.toml 進行版本號提升,並於 CHANGELOG.md 新增相關紀錄。

新增 AI Agent 支援

本節說明如何為 Specify CLI 新增對新 AI agent/輔助工具的支援。整合新 AI 工具進 Spec-Driven Development 工作流程時,請參考本指南。

概覽

Specify 能支援多個 AI agent,於專案初始化時會產生 agent 專屬的指令檔案及目錄結構。每個 agent 皆有其專屬慣例,包括:

  • 指令檔案格式(Markdown、TOML 等)
  • 目錄結構(.claude/commands/、.windsurf/workflows/ 等)
  • 指令呼叫模式(斜線指令、CLI 工具等)
  • 參數傳遞慣例($ARGUMENTS、{{args}} 等)

目前支援的 Agent

Agent 目錄 格式 CLI 工具 說明
Claude Code .claude/commands/ Markdown claude Anthropic 的 Claude Code CLI
Gemini CLI .gemini/commands/ TOML gemini Google 的 Gemini CLI
GitHub Copilot .github/prompts/ Markdown 無(IDE 為主) GitHub Copilot(VS Code)
Cursor .cursor/commands/ Markdown cursor-agent Cursor CLI
Qwen Code .qwen/commands/ TOML qwen 阿里巴巴 Qwen Code CLI
opencode .opencode/command/ Markdown opencode opencode CLI
Codex CLI .codex/commands/ Markdown codex Codex CLI
Windsurf .windsurf/workflows/ Markdown 無(IDE 為主) Windsurf IDE 工作流程
Kilo Code .kilocode/rules/ Markdown 無(IDE 為主) Kilo Code IDE
Auggie CLI .augment/rules/ Markdown auggie Auggie CLI
Roo Code .roo/rules/ Markdown 無(IDE 為主) Roo Code IDE
CodeBuddy CLI .codebuddy/commands/ Markdown codebuddy CodeBuddy CLI
Amazon Q Developer CLI .amazonq/prompts/ Markdown q Amazon Q Developer CLI
Amp .agents/commands/ Markdown amp Amp CLI

Read the full file on GitHub · 395 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.

  1. 1mo ago First seen · 395 lines · 4,094 tokens per session scan A 2fbe8dbd73b3

Subscribe to this mod's changes

spec-kit AGENTS.md is an instructions file published in the GitHub repository doggy8088/spec-kit (292 stars, last pushed 12mo ago), licensed MIT. It adds 4,094 tokens to every session, about $0.0164 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.

Related

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).

microsoft/vscode · 9,715 tokens

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.

vercel/next.js · 7,581 tokens

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).

microsoft/vscode · 5,262 tokens

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.

langchain-ai/langchain · 4,680 tokens

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).

microsoft/vscode · 2,731 tokens

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.

deepseek-ai/deepseek-harness · 4,261 tokens