Claude Code v2.1.237

Released Aug 20, 2026 (10 days ago).

"References this build" means the issue body mentions running 2.1.237 (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 v2.1.237

Ranked by community engagement (reactions and comments).

• [BUG] 2.1.237 tagged `latest` with its linux-x64, win32-x64 and linux-x64-musl native packages never published - installs land on a dead 500-byte stub
  Open 💬 8 👍 6 #88103
• [Bug] Anthropic API Error: Reasoning extraction safeguard false positive on consecutive tool calls
  Open 💬 4 👍 3 #88175
• 2.1.242+ segfault is glibc-2.44-only: bisected 2.35→2.44, glibc 2.44's __newlocale refactor added an unconditional free(NULL); simulating a NULL guard boots 2.1.243 cleanly
  Open 💬 0 👍 4 #89420
• [FEATURE] Desktop: allow multiple simultaneous spellchecker languages
  Open 💬 0 👍 4 #88502
• [BUG] Pointless timeout prevents updates over slow internet connections
  Open 💬 1 👍 3 #89262
• [BUG] Double Ctrl+L no longer runs /clear: the double-press gate was removed in 2.1.238, leaving no key path to clear the conversation
  Open 💬 1 👍 3 #88540
• [BUG] Custom output styles cannot set `turnReminder`, so they steer weaker than built-ins by construction
  Open 💬 1 👍 3 #88189
• Worktree creation writes an ABSOLUTE core.hooksPath into config.worktree, so worktrees run the MAIN checkout's hooks
  Open 💬 5 👍 1 #88747
• [BUG] Default totalTokensReminder (padded-countdown) shows a number unrelated to context usage — model told the user "plenty left" moments before dying at the 1M context limit
  Open 💬 2 👍 2 #88211
• [BUG] Desktop app creates duplicate project directories for UNC cwd (trailing-separator normalization), causing daily chat-history loss
  Open 💬 6 #89283
• Subagents receive a CLAUDE.md/memory snapshot from parent session start, not spawn — undocumented, no way to refresh
  Open 💬 5 #88886
• [BUG]
  Open 💬 4 #89691
• [BUG] Desktop app corrupted after silent "stealth update" — recurring "app is corrupt, needs repair" errors
  Resolved 💬 4 #88673
• [BUG] Resuming a fork forfeits its prompt cache: deterministic miss after any tool loop, fork 5m vs parent 1h TTL, full-context rewrites while the prefix is live
  Open 💬 4 #88444
• [Bug] Profile bio field incorrectly triggers safety filters
  Resolved 💬 1 👍 1 #88227
• Background sessions: resume-by-id fails, four sessions share one name, version pins, and there is no documented way out
  Open 💬 4 #88193
• [DOCS] Cowork monitoring docs state events are "metadata only" by default; first-party orgs receive full prompts, responses and tool arguments
  Open 💬 0 👍 1 #89594
• Windows Desktop app: "+New > Local" session spawns via SSH into WSL instead of native Windows, so the browser pane never appears
  Open 💬 0 👍 1 #89527
• /compact silently fails to apply on very large conversations: summary generated, boundary never written, context unchanged
  Open 💬 3 #89040
• Cross-session `send_message` has no working return path — sender's `local_<uuid>` id is unreachable from the `ListAgents`/`SendMessage` namespace
  Open 💬 3 #88970
• Windows: all desktop sessions unreachable when a shared Remote Control host dies; false "Claude.ai login expired" while credentials are valid
  Open 💬 0 👍 1 #88875
• Archive/delete of Claude Code sessions is per-client — desktop's archive flag is invisible to the VS Code extension
  Open 💬 0 👍 1 #88476
• [BUG] Waking an idle agent fork (`subagent_type: "fork"`) forfeits its inherited prompt cache on every wake — `messages_changed`, `cache_read` pinned to a fixed boundary, not TTL
  Resolved 💬 3 #88412
• Weekly quota pool: one −14% step between windows, then partial rebound (Max 20x) — earlier −43.5% figure retracted
  Open 💬 3 #88352
• [Bug] Anthropic API Error: Reasoning Extraction Safety Filter Triggered on Legitimate Code
  Open 💬 3 #88264
• [BUG] Org-plugin "Installed by Default" plugins missing from a fresh Claude Code on the web session — related to #63028?
  Open 💬 0 👍 1 #88248
• [Bug] Claude Code generated untested service version causing failed deployment and wasted session tokens
  Open 💬 2 #90321
• change_directory cannot re-mount a session's original root directory after the session has moved away from it
  Open 💬 2 #90205
• Background auto-updater lacks a post-install effectiveness check — five identical same-version reinstalls in 109 min when the running copy isn't the prefix install
  Open 💬 2 #89560
• [BUG] Desktop GUI session delete removes only the registry entry — plaintext transcript remains on disk (indefinitely if `cleanupPeriodDays` is raised)
  Open 💬 2 #89547

Changelog