Claude Code v2.0.42

What: LSP servers can now send requests back to Claude Code and receive responses, enabling full bidirectional communication required by the LSP protocol.

How it works: The LSP client now supports onRequest() to handle incoming requests from language servers, complementing the existing onNotification() for one-way messages. This enables proper LSP protocol compliance.

Details:

• Added onRequest() method to LSP client wrapper at y$Q() at line 283672
• Implemented request handler queueing system (variable X = [] at line 283555) for handlers registered before connection establishment
• Exposed onRequest in high-level LSP server API at x$Q() at line 283868
• Immediately utilized to handle workspace/configuration requests at line 286293, returning null for all configuration items (safe default)
• Evidence: y$Q() at line 283547-283803 (new LSP client), x$Q() at line 283893 (exposed API)

Why it matters: Many LSP servers (TypeScript, Python, etc.) require clients to respond to workspace/configuration requests during initialization. Without this, some language servers may fail to initialize properly or operate with reduced functionality.

What: Background tasks now verify that the Claude GitHub app is installed on the repository before allowing execution.

How to use: When initiating background tasks in a GitHub repository, Claude Code automatically checks if the Claude app is installed. If not, you'll receive a clear error message with installation link.

Details:

• New validation function KT2() at line 426828 checks app installation via API endpoint /api/oauth/organizations/{orgId}/code/repos/{owner}/{repo}
• GitHub repository detection function Fb() at line 426624 extracts owner/repo from git remote URL
• Added fourth validation check to background task prerequisites (alongside login, remote environment, and git repo checks) in TT2() at line 427717
• New error type github_app_not_installed with user-friendly message and installation link at line 427972
• Evidence: KT2() at line 426828, TT2() at line 427717, Fb() at line 426624

Why it matters: Ensures background tasks have proper GitHub integration permissions before execution, preventing mysterious failures when app permissions are missing.

What: GitHub CLI authentication detection now uses JSON output parsing for more reliable credential extraction.

How it works: The gh auth status command is now called with --active --json hosts flags, parsing structured JSON instead of text output. This improves reliability across different gh CLI versions and configurations.

Details:

• New function Xi5() at line 426046 uses gh auth status --active --json hosts for structured output
• Parses JSON response to extract hosts object and active account login
• Handles multiple GitHub hosts (github.com, Enterprise instances) by iterating through host entries
• Replaces old shell parsing approach that used sh -c "gh auth status 2>&1 | head -n 1" and regex matching
• Evidence: Xi5() at line 426046-426076

Why it matters: More robust GitHub authentication detection prevents false negatives and works consistently across different GitHub CLI versions and Enterprise configurations.

What: Added function to retrieve git user email from git configuration.

How to use: Automatically detects git config user.email value when linking VCS accounts.

Details:

• New function Wi5() at line 426065 executes git config --get user.email
• Integrated with VCS account linking in QT2() at line 426023, now includes git_user_email field
• Used to associate git commits with Claude Code user accounts
• Evidence: Wi5() at line 426065, QT2() at line 426023

What: LSP servers now receive proper workspace root information during initialization instead of null values.

Details:

• Changed rootPath from null to actual workspace folder path in LSP initialize request at x$Q() at line 283755
• Changed rootUri from null to file:// URI of workspace folder at line 283756
• Improves backward compatibility with LSP servers that rely on deprecated rootPath/rootUri fields
• Evidence: x$Q() at line 283750-283756

Why it matters: Some language servers use the deprecated rootPath and rootUri fields for workspace detection. Providing actual values instead of null improves compatibility with older LSP implementations.

What: Plugin enable/disable operations now properly propagate errors to callers.

Details:

• Function sQ0() at line 489317 now captures and throws errors from B2() settings update
• Added error destructuring: let { error: Z } = B2("userSettings", { enabledPlugins: G })
• Throws error if settings update fails: if (Z) throw Z;
• Evidence: sQ0() at line 489317-489323

Why it matters: Previously, settings update failures could be silently ignored. Now callers can properly handle and report errors when plugin state changes fail.

What: Function-type hooks are now filtered out when serializing plugin hooks.

Details:

• Function Er2() at line 472146 adds .filter((Q) => Q.type !== "function") to hook serialization
• Prevents function-type hooks from being included in serialized plugin configurations
• Evidence: Er2() at line 472146-472151

Why it matters: Function-type hooks cannot be serialized to JSON, so filtering them prevents serialization errors.

What: Hook execution now handles multiple hook types including callback and function types.

Details:

• Updated vz() function at line 472202 to handle four hook types: command, prompt, callback, and function
• Function PBI() at line 473700 executes function-type hooks with proper timeout and abort signal handling
• Callback hook execution in jBI() at line 473754 simplified with cleaner abort handling
• Evidence: vz() at line 472202, PBI() at line 473700, jBI() at line 473754

What: Go-to-definition results are now normalized to handle both Location and LocationLink formats.

Details:

• New helper functions Ih2() at line 441143 and Qh2() at line 441140 detect and convert LocationLink format
• Function ds5() at line 441543 normalizes LocationLink to Location format
• Updated Yh2() at line 441146 to handle mixed result arrays with both formats
• Evidence: Ih2() at line 441143, Qh2() at line 441140, ds5() at line 441543, Yh2() at line 441146

Why it matters: LSP spec allows servers to return either Location or LocationLink for definitions. Normalization ensures consistent handling regardless of format.

What: Hook matching now considers both matcher name and hook event when finding applicable hooks.

Details:

• Function Hr2() at line 472167 updated to match hooks by matcher name first, then by hook criteria
• Supports empty matcher string for wildcard matching
• Returns full hook entry (not just onMatch callback) for more context
• Evidence: Hr2() at line 472167-472185

What: Added helper functions for looking up MCP server configurations and resources by normalized names.

Details:

• Function Te2() at line 495603 retrieves MCP server config by name with fallback to normalized name
• Function Pe2() at line 495609 retrieves MCP resources by name with normalized name fallback
• Handles case-insensitive lookups via normalizedNames mapping
• Evidence: Te2() at line 495603, Pe2() at line 495609

What: Added claude_code_container_id to telemetry payload when running in containerized environments.

Details:

• Function Wp2() at line 450308 now includes claudeCodeContainerId in telemetry
• Mapped to claude_code_container_id field at line 450398
• Sourced from CLAUDE_CODE_CONTAINER_ID environment variable
• Evidence: Wp2() at line 450398-450399

What: Simplified plugin bash command execution by removing plugin root directory injection.

Details:

• Function cc() at line 432214 no longer wraps commands with An5() to inject CLAUDE_PLUGIN_ROOT
• Commands now execute directly without environment variable manipulation
• Evidence: cc() at line 432214-432236

What: Improved abort signal handling in callback hooks to prevent unhandled promise rejections.

Details:

• Function jBI() at line 473754 simplified to let errors propagate naturally
• Removed try-catch block that was catching and converting abort errors
• Abort signals now handled by upstream code
• Evidence: jBI() at line 473754-473794

• Consolidated node:process imports: Added cwd as Xy0 at line 77734
• Consolidated node:stream imports: Added Readable as Hs9 at line 87712
• Split node:child_process imports: Added execSync as $UQ, spawn as eR6 at line 279661
• Reorganized node:path imports: Changed to posix as O9I, win32 as VQ0 at line 482076
• Added specific imports: join as K19, basename as w8I from path at line 489603
• Added PassThrough as p8I from stream at line 490866
• Added homedir as G6I from node:os at line 492712

Multiple variables renamed due to code minification:

• Ev0 → OUB (TodoWrite tool description)
• JLQ → y$Q (LSP client wrapper)
• cl5 → Xi5 (GitHub auth detection)
• An5 → (removed, plugin env wrapper)
• Pi2 → Er2 (plugin hook serializer)
• Dt → vz (hook type extractor)
• FLQ → x$Q (LSP server manager)
• WT2 → QT2 (VCS account linker)
• aQ0 → sQ0 (plugin enabler)
• _T2 → TT2 (background task validator)
• $BI → jBI (callback hook executor)
• Qh2 → Yh2 (definition result formatter)
• Various function identifiers changed due to obfuscation