Claude Code v2.1.177

Released Jun 13, 2026 (2 months ago).

"References this build" means the issue body mentions running 2.1.177 (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 v2.1.177

Ranked by community engagement (reactions and comments).

• [Bug] [URGENT] Claude Opus 4.8/5.0 reasoning degradation, speed and performance regression
  Open 💬 37 👍 35 #68780
• Custom model via ANTHROPIC_BASE_URL: no way to declare a context window >200k (status line & auto-compaction assume 200k)
  Resolved 💬 13 👍 7 #68522
• [Bug] Anthropic API Error: 500 Internal Server Error
  Resolved 💬 2 👍 9 #70333
• [BUG] Thinking block summaries truncated mid-sentence (showThinkingSummaries: true)
  Open 💬 8 👍 6 #84780
• Enabling a plugin writes all its transitive dependency plugins into the consumer's settings.json enabledPlugins
  Resolved 💬 1 👍 8 #68416
• Persistent "Fable 5 unavailable" banner has no dismiss and is redundant with the disabled selector entry
  Resolved 💬 3 👍 7 #68578
• [Bug] Anthropic API Error: 500 Internal Server Error
  Resolved 💬 1 👍 6 #70339
• [BUG] Max 5x plan incorrectly downgraded to Free after Max 20x refund (Fable 5 government removal, June 13 2026)
  Open 💬 9 👍 3 #68251
• [Bug] Claude Code CLI performance severely degraded - extremely slow execution
  Resolved 💬 5 👍 4 #68424
• [Bug] Significant latency increase in API response times
  Resolved 💬 3 👍 4 #70275
• [FEATURE] Opus 4.8 (1M context) model option disappeared from the model picker
  Resolved 💬 6 👍 3 #69109
• [Bug] Inline renderer corrupts terminal scrollback with interleaved overwrites
  Resolved 💬 3 👍 4 #68755
• [BUG] JetBrains reworked terminal duplicate mouse events: links open twice (clicks not de-duplicated like scroll)
  Open 💬 6 👍 3 #68568
• Unable to install any connector in claude desktop
  Resolved 💬 7 👍 2 #68649
• [BUG] claude-opus-4-8 fabricates user messages inside thinking blocks and replies to them (~26 min self-conversation; session restart does not help, only model rollback does)
  Resolved 💬 4 👍 3 #68213
• Desktop app: offer to resume interrupted runs after a relaunch/update (macOS "reopen windows" style)
  Resolved 💬 2 👍 3 #69456
• [BUG] Auto-mode safety classifier reports model "temporarily unavailable," blocking all Bash/WebSearch while normal generation works fine
  Resolved 💬 2 👍 3 #68437
• [BUG] Model fabricates subsequent user/system turns inside one assistant message, then acts on its own fabrication
  Open 💬 5 👍 2 #68367
• [Bug] Anthropic API Error: Unable to connect to API (ECONNRESET)
  Open 💬 1 👍 3 #69242
• [BUG] Cowork local-agent-mode sessions missing from Recents despite intact data on disk (Windows)
  Open 💬 6 👍 1 #69663
• [BUG] Weekly usage limit draining 10x faster than normal after June 19 reset
  Resolved 💬 3 👍 2 #69608
• Workflow fan-out inherits a premium-tier default with no per-agent cost ceiling, causing ~$1k in auto-purchased charges
  Open 💬 9 #68285
• [BUG] ExitWorktree (remove) reports success but orphans the worktree (dir + admin entry + branch); intermittently corrupts parent repo core.bare
  Open 💬 5 👍 1 #69802
• [BUG] Multiple background agents completing simultaneously overflow main context — API returns empty response
  Resolved 💬 8 #68582
• [BUG] Voice transcription via mobile app fails for longer Inputs
  Resolved 💬 2 👍 2 #68519
• [BUG] `CLAUDE_CODE_OAUTH_TOKEN` is shadowed by a stale `~/.claude/.credentials.json` (precedence reversed in 2.1.x) → `/login`
  Resolved 💬 2 👍 2 #68241
• [Bug] CSS changes reverted during Angular app migration with multiple file rewrites
  Resolved 💬 7 #74274
• [Bug] Anthropic API Error: HTTP 500 Internal Server Error
  Resolved 💬 1 👍 2 #70347
• [BUG] Clickable file links in chat panel no longer open files in editor (regression in v2.1.178+)
  Resolved 💬 1 👍 2 #69240
• [BUG]
  Resolved 💬 4 👍 1 #68565