Claude Code Changelog

Fetch and explain Claude Code version changes from the official changelog.

Workflow

First, determine the query type and choose the appropriate data source:

For Single Version Queries (GitHub Release Page)

1. Fetch the release page: https://github.com/anthropics/claude-code/releases/tag/v[X.Y.Z]
2. Extract the release date from the page:
   • Look for text pattern: released this [datetime] (e.g., "ashwin-ant released this 09 Jan 23:32")
   • If relative time shown (e.g., "2 days ago"), convert to absolute date
   • If 404 error, the version may not have a formal Release (common for early versions)
3. Extract the release notes content from the main content area (formatted with bullet points)

For Version Range / Multiple Versions (CHANGELOG.md)

1. Fetch the changelog: https://raw.githubusercontent.com/anthropics/claude-code/main/CHANGELOG.md
2. Extract relevant version sections:
   • Specific version: Find the ## [X.Y.Z] section
   • Latest version: Use the first version section
   • Version range: Extract all versions in range
3. For each version, optionally fetch the release date from GitHub Releases if needed:
   • Use https://github.com/anthropics/claude-code/releases/tag/v[X.Y.Z]
   • Handle 404 gracefully (early versions may not have Releases)

Common Steps (Apply to Both Data Sources)

1. Categorize and explain changes:

   Category	Prefix	Explanation Focus
   New Features	"Added"	What capability this enables, use cases
   Bug Fixes	"Fixed"	What issue was resolved, impact
   Improvements	"Improved"	Performance/UX benefits
   Changes	"Changed"	Behavior differences, migration notes
   Breaking Changes	"Breaking change:"	Required actions, compatibility
   Security	Security-related	Vulnerability details, urgency
   Platform-Specific	[Windows], [VSCode], [SDK]	Platform relevance

2. Provide educational context:

   • Explain technical terms (MCP, hooks, etc.)
   • Highlight important changes users should know
   • Note any required actions or migrations

Response Format

Structure the explanation as:

## Claude Code [version] 更新说明 (发布于 [date])

### 新功能
- **功能名称**: 详细解释这个功能做什么、为什么有用

### Bug 修复
- **修复内容**: 解释修复了什么问题

### 改进
- **改进内容**: 解释改进带来的好处

### 重要提示
- 任何需要用户注意的破坏性变更或迁移事项

Examples

User: "Claude Code 2.1.3 有什么更新？"

Action: Determine query type (single version) → Fetch GitHub Release page https://github.com/anthropics/claude-code/releases/tag/v2.1.3 → Extract date from "released this..." text → Extract release notes → Categorize and explain in Chinese

User: "最新版本的 Claude Code 有什么新功能？"

Action: Determine query type (latest) → Fetch GitHub Release page /latest → Extract date and content → Focus on "Added" items with detailed explanations

User: "2.0 之后和 plan mode 有关的更新有哪些？"

Action: Determine query type (version range) → Fetch CHANGELOG.md → Extract sections for versions 2.0.x → Filter for "plan" related changes → Optionally fetch release dates for key versions → Summarize across versions