# Claude Code v2.0.50 > Claude Code v2.0.50, released 21 Nov 2025 (2025-11-21). 12 entries read out of the shipped bundle. Unofficial, and not affiliated with Anthropic. Web version: https://changelogs.core-directive.com/v/2.0.50 This release introduces cross-project conversation resume, a new MCP CLI endpoint for external tool integration, mandatory source citations for web search results, and human-friendly session naming using memorable word combinations like "fluffy-bouncing-bunny". ## Changes ### Cross-Project Conversation Resume **What:** View and resume conversations from any project directory, not just the current one. **How to use:** `# Use /resume command and toggle "Show all projects" claude > /resume # Press the toggle key to switch between current project and all projects` **Details:** - When enabled, scans `~/.claude/projects/` for all project directories - Shows project path in conversation list for cross-project items - For conversations from different directories, copies the resume command to clipboard - Provides clear instructions: `cd /path/to/project && claude --resume ` - **Evidence**: `FZ1()` at line 487757, `VZ1()` at line 504532 in v2.0.50 ### MCP CLI Endpoint **What:** HTTP REST API server for external tools to interact with Claude Code's MCP servers programmatically. **How to use:** `# Enable the endpoint (enabled by default when Claude Code is running) # External tools can make requests to localhost with bearer token auth # Example: List available MCP servers curl -X POST http://127.0.0.1:/mcp \ -H "Authorization: Bearer " \ -H "Content-Type: application/json" \ -d '{"command": "servers"}' # Example: Call an MCP tool curl -X POST http://127.0.0.1:/mcp \ -H "Authorization: Bearer " \ -d '{"command": "call", "params": {"server": "myserver", "tool": "mytool", "args": {}}}'` **Details:** - Supports commands: `servers`, `tools`, `info`, `call`, `grep`, `resources`, `read` - Bearer token authentication with 32-byte random secret - Localhost-only binding for security - Endpoint info stored in `~/.claude/.endpoint` - Can be disabled via `ENABLE_MCP_CLI_ENDPOINT=false` environment variable - **Evidence**: `class hX0` at line 515880 in v2.0.50 ### Friendly Session Slug Names **What:** Plan files now use memorable, human-readable names instead of UUIDs. **How to use:** `# Session plans are now named with friendly slugs like: # ~/.claude/plans/fluffy-bouncing-bunny.md # ~/.claude/plans/golden-dancing-butterfly.md` **Details:** - 146 adjectives × 112 verbs × 300 nouns = 4.9 million unique combinations - Word categories include nature terms, animals, and whimsical objects - Names like "sparkly-juggling-penguin" or "cozy-dreaming-unicorn" - **Evidence**: `$A2()` at line 300930, word arrays at lines 300938-301497 in v2.0.50 ### Code Change Indicator **What:** Real-time display of file modifications during a conversation showing files changed and lines added/removed. **Details:** - Shows: `2 files +15 -8` format with color-coded counts - Green for additions, red for deletions - Tracks changes from tool use results - Updates as files are modified during the session - **Evidence**: `Fo2()` component at line 451329 in v2.0.50 ### JSON Schema Support in SDK Initialization **What:** Pass JSON schemas at SDK initialization time for automatic structured output validation. **How to use:** `# Python SDK example from claude_code import ClaudeCode client = ClaudeCode() response = client.run( prompt="Generate user data", json_schema={ "type": "object", "properties": { "name": {"type": "string"}, "age": {"type": "integer"} }, "required": ["name", "age"] } )` **Details:** - Schema is validated using Ajv validator - Automatically creates a StructuredOutput validation tool - Validates all outputs against the schema throughout the session - Works via both SDK initialization and CLI `--json-schema` flag - **Evidence**: `$D0()` at line 2327, `$G1()` at line 470974 in v2.0.50 ### WebSearch Tool Now Requires Source Citations **What:** Claude must now include a "Sources:" section with hyperlinked references when using web search. **Details:** - Mandatory "Sources:" section at end of responses using web search - Links formatted as markdown hyperlinks: `[Title](URL)` - Returns now include "links as markdown hyperlinks" in results - **Evidence**: `k9B` variable at line 187201 in v2.0.50, adds "CRITICAL REQUIREMENT" section ### Enhanced LSP Client Robustness **What:** Significant improvements to Language Server Protocol client reliability and error handling. **Details:** - New spawn event handling ensures process fully started before using stdio - Added stdin error handler for write failures - Added connection-level error and close handlers - New cleanup flag prevents spurious errors during intentional shutdown - Enhanced listener cleanup removes stdin/stderr handlers on stop - Trace setup now has error handling - **Evidence**: `w02()` function at line 304885 in v2.0.50 ### Session Memory Template Enhancement **What:** Added "Key results" section to session memory template for capturing concrete outputs. **Details:** - New section between "Learnings" and "Worklog" - Purpose: Store specific answers, tables, or documents user requested - Template prompt: "_If the user asked a specific output such as an answer to a question, a table, or other document, repeat the exact result here_" - **Evidence**: `hP3` template at line 508626 in v2.0.50 ### Remote Session Persistence Retry Logic **What:** Added retry mechanism for remote session log persistence. **Details:** - Retries failed persistence attempts with exponential backoff - Base delay of 1 second, max 8 seconds between attempts - Better error messages including entry UUID in conflict errors - **Evidence**: `JS5()` function at line 393547 in v2.0.50 ### IDE Name Resolution Enhancement **What:** Improved detection and display of IDE names from various formats. **Details:** - Better handling of lowercase and trimmed IDE identifiers - Fallback lookup for IDE display names - Handles space-separated IDE names (uses first word) - **Evidence**: `CE()` function at line 318709 in v2.0.50 ### Large MCP Tool Result Handling **What:** Improved handling of oversized MCP tool results with structured output support. **Details:** - Detects when results exceed maximum token limits - Saves large outputs to temporary files - Reports output format (plain text, JSON, JSON array with schema) - Provides clear instructions for reading chunked content - **Evidence**: `HZ5()` function at line 333257 in v2.0.50 ### Startup Performance Telemetry **What:** Added detailed startup performance tracking for diagnostics. **Details:** - Tracks import time, init time, settings load time, and total startup time - Reports checkpoint counts and timing intervals - Sampled at 0.1% of sessions for telemetry - **Evidence**: `wT3()` function at line 506078, `UT3` timings at line 506093 in v2.0.50