Claude Code v2.1.17

Released Jan 22, 2026 (7 months ago).

"References this build" means the issue body mentions running 2.1.17 (from the bug-report template). It reflects report volume, not a proven defect count — an issue may mention a version without being caused by it. First-party data from the anthropics/claude-code tracker.

Top issues reported on v2.1.17

Ranked by community engagement (reactions and comments).

• Claude.ai MCP servers auto-injected into Claude Code without opt-in — causes OOM crashes on resource-constrained systems
  Resolved 💬 39 👍 142 #20412
• Claude in Chrome browser extension not connecting to Claude Code CLI
  Open 💬 51 👍 41 #20298
• [BUG] Native Claude Code not using system certs on MacOS
  Resolved 💬 13 👍 25 #20194
• [BUG] API Error: 500
  Resolved 💬 15 👍 20 #20177
• [Bug] Claude Code hangs unresponsively on macOS M1, requires terminal force-close
  Open 💬 10 👍 15 #20380
• [BUG] Claude leaves behind locked panels in VSCode
  Resolved 💬 13 👍 14 #20324
• [BUG] TUI rendering corrupted in neovim's built-in terminal (macOS)
  Resolved 💬 11 👍 8 #20436
• Feature: Add tasksDirectory setting (like plansDirectory)
  Resolved 💬 5 👍 10 #20425
• Orphaned subagent process leaks memory when parent terminal session terminated
  Resolved 💬 15 👍 6 #20369
• [BUG] /context command output renders twice
  Resolved 💬 8 👍 8 #20391
• [Bug] Claude in Chrome fails when Claude Desktop native messaging host config exists (macOS)
  Resolved 💬 11 👍 7 #20316
• [BUG] Extremely slow thinking/response time on WSL2 - works fine on native Linux
  Resolved 💬 9 👍 6 #22855
• [BUG] Claude Code v2.1.17 exits immediately on WSL1 - regression from working state
  Resolved 💬 8 👍 5 #20351
• [BUG] Critical: WSL2 delay regression now unbearable — Pro Max Plan user, unresolved since January 2026
  Resolved 💬 10 👍 4 #41649
• [Bug] ZlibError decompression spam with litellm integration in native build
  Resolved 💬 10 👍 4 #20199
• Bundled Bun 1.3.5 crashes on Windows with integer overflow
  Open 💬 9 👍 4 #20322
• [Bug] Claude Desktop native messaging host intercepts Chrome extension connection, blocking Claude Code integration
  Resolved 💬 8 👍 4 #20341
• [BUG] Got API Error 500
  Resolved 💬 8 👍 4 #20179
• [Bug] Claude Opus 4.5 ignores instructions, significant degradation since Jan 14
  Resolved 💬 10 👍 3 #20330
• ToolSearch:optimistic polling loop causes 100% CPU usage
  Resolved 💬 10 👍 3 #20329
• [BUG] PostToolUse hook for ExitPlanMode does not fire when you clear context
  Resolved 💬 3 👍 5 #20397
• [BUG] Verified Evidence: Claude Code Delivers 10% of Requested Thinking Budget While Charging Full Price
  Resolved 💬 12 👍 2 #20350
• [Bug] Up arrow key navigates command history instead of moving cursor in multi-line prompts
  Resolved 💬 5 👍 4 #20328
• Agent gets stuck in 'working' state with 0 tokens after completing turn
  Resolved 💬 3 👍 4 #20430
• [BUG] Terminal viewport jitter / aggressive auto-scrolling during task execution
  Resolved 💬 5 👍 3 #20427
• [Bug] Anthropic API Error: Internal Server Error (500)
  Resolved 💬 5 👍 3 #20185
• [BUG] Both VS Code extension and CLI crash with Bun v1.3.5 "integer does not fit in destination type" on Windows 11 - v2.1.19 still affected
  Resolved 💬 4 👍 3 #20674
• [BUG] Memory leak: 17GB RSS from accumulated "Tool not found" errors
  Resolved 💬 4 👍 3 #20450
• [BUG] Session files grow unboundedly, causing OOM crash on startup ("Aborted (core dumped)")
  Resolved 💬 7 👍 2 #20367
• [Bug] Chrome Extension Connection Not Detected Despite Active Connection
  Resolved 💬 4 👍 3 #20318

Changelog