Claude Code v1.0.128

What: A complete plugin distribution and installation infrastructure that enables discovering and installing plugins from centralized marketplaces.

How to use:

# Enable a plugin from a marketplace
# Use the format: plugin-name@marketplace-name
claude settings --set enabledPlugins.formatter@official=true

Details:

• Marketplace manifests (marketplace.json) define available plugins with metadata
• Multiple marketplace sources supported: URL, GitHub repos, Git URLs, NPM packages, and local files
• Plugin sources: npm packages, GitHub repositories, git URLs, local directories
• Plugin ID format: plugin@marketplace (e.g., code-formatter@official-plugins)
• Marketplaces cached in ~/.config/claude-code/plugins/marketplaces/
• Plugin installations cached in ~/.config/claude-code/plugins/cache/
• Strict mode (default) requires plugin.json manifest in plugin folder
• Non-strict mode uses marketplace entry as manifest if plugin.json is missing
• Supports plugin versioning, categories, tags, and rich metadata
• Evidence: ba4() marketplace loader at line 377017, la4() plugin cacher at line 377152, aa4() plugin loader at line 377392, marketplace schemas at lines 376680-376846

What: Added support for tracking when Claude Code is invoked through the Claude Agent SDK, enabling better analytics and contextual identity.

How it works: When the CLAUDE_AGENT_SDK_VERSION environment variable is set, it's automatically included in telemetry and user agent strings.

Details:

• User agent string enhanced from claude-cli/1.0.128 (external, <entrypoint>) to claude-cli/1.0.128 (external, <entrypoint>, agent-sdk/<version>) when SDK is used
• New agentSdkVersion field in telemetry data (line 440142)
• Enables Anthropic to distinguish direct CLI usage from SDK-mediated usage
• Evidence: IM() user agent function at line 368228, telemetry field at lines 140142-440144

What: Claude Code now uses different identity strings based on operational context (interactive CLI vs non-interactive SDK usage).

Details:

• Interactive CLI mode: "You are Claude Code, Anthropic's official CLI for Claude."
• SDK with custom system prompt: "You are Claude Code, Anthropic's official CLI for Claude, running within the Claude Agent SDK."
• SDK without custom prompt: "You are a Claude agent, built on Anthropic's Claude Agent SDK."
• Vertex AI provider always uses the standard CLI identity
• Enables context-aware behavior based on how Claude Code is being used
• Evidence: Identity selection function A$1() at line 366028, identity strings at lines 366024-366027

What: Unlocked the file checkpointing ("Rewind") feature that allows reverting file changes to previous snapshots.

Details:

• Feature existed in previous versions but was hardcoded to disabled
• Now activatable via the tengu_use_file_checkpoints feature flag
• UI toggle added in settings: "Checkpointing (Rewind)" (line 400220)
• Can be disabled via CLAUDE_CODE_DISABLE_FILE_CHECKPOINTING environment variable
• Tracks file modifications and creates snapshots at message boundaries
• Enables rewinding files to previous states during conversations
• Disabled in headless mode
• Still behind a feature flag for gradual rollout
• Evidence: Activation function u7() at line 380874, UI controls at lines 400220-400237

What: Replaced simple single-notification system with a sophisticated priority-based queue.

Details:

• Four priority levels: immediate (0), high (1), medium (2), low (3)
• Notifications queued and displayed based on priority sorting
• "Immediate" priority can interrupt currently displayed notifications
• State structure: { current: notification | null, queue: notification[] }
• Notifications support rich content via jsx property for React components
• Unique key property for deduplication
• Visual theming via color property
• Default 8000ms timeout (configurable via timeoutMs)
• Evidence: Priority queue function Qz() at line 363067, priority sorting F19() at line 363140, priority mapping at line 363139

What: Refactored credential storage from factory functions to singleton objects with memoized read operations.

Details:

• Keychain storage (Hy1) and plaintext storage (pZ1) now singleton objects
• Read operations memoized to avoid redundant file/keychain access
• Storage path computation cached via jV0() helper
• Explicit cache invalidation after update() or delete() ensures correctness
• Improved performance through reduced object allocation and I/O operations
• No user-visible changes to behavior
• Evidence: Keychain singleton at line 378779, plaintext singleton at line 378823, path memoization at line 378818

What: Extended plugin manifest schema with richer metadata and flexible configuration options.

Details:

• Support for homepage, repository, license, and keywords fields
• Plugin name validation enforces kebab-case (no spaces allowed)
• Author information with name, email, and URL
• Marketplace entries support categories and tags for discoverability
• Additional hooks via manifest: inline hook definitions or paths to hook files
• Additional commands/agents via manifest file references
• MCP server configurations can be specified in plugin manifests
• Semantic versioning support following semver.org specification
• Evidence: Plugin manifest schema at lines 376570-376602, hooks schema at line 376603, commands schema at line 376631

• Refactored notification system architecture from component-local to global state management
• Renamed minified function names as part of routine obfuscation (e.g., BM() → IM(), m7() → u7())
• Updated URL reference from https://claude.ai/code to https://claude.com/claude-code (line 385020)
• Added synchronized rendering control via ANSI escape sequences: Mt1 (start) and Ot1 (end) at lines 357199-357200
• Enhanced plugin loading with support for multiple command/agent paths via commandsPaths and agentsPaths arrays
• Added helper functions for git operations, npm package installation, and directory copying
• Improved error handling with specific error types like cC for invalid schemas

~/.config/claude-code/plugins/
├── known_marketplaces.json       # Registry of configured marketplaces
├── marketplaces/                 # Cached marketplace manifests
│   └── <marketplace-name>/
│       └── marketplace.json
└── cache/                        # Installed plugin files
    └── <plugin-name>/
        ├── .claude-plugin/
        │   └── plugin.json
        ├── commands/
        ├── agents/
        └── hooks/

{
  "name": "Official Plugins",
  "owner": { "name": "Anthropic", "email": "[email protected]" },
  "plugins": [
    {
      "id": "formatter",
      "name": "Code Formatter",
      "source": { "source": "npm", "package": "@anthropic/formatter-plugin" },
      "category": "development",
      "tags": ["formatting", "code-quality"]
    }
  ]
}

None - all changes are backward compatible or additive.