Claude Code v2.1.158

Released May 30, 2026 (3 months ago).

"References this build" means the issue body mentions running 2.1.158 (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 v2.1.158

Ranked by community engagement (reactions and comments).

• Recurring error: "The model's tool call could not be parsed (retry also failed)" interrupts sessions
  Resolved 💬 75 👍 116 #63875
• [BUG] Bash tool calls emitted as raw <invoke> text instead of executing
  Open 💬 25 👍 48 #63870
• [Bug] Parallel tool calls hang on Bash execution errors
  Resolved 💬 6 👍 20 #63881
• [BUG] Auto mode blocks all Bash actions with endless retries when Opus 4.8 classifier is temporarily unavailable
  Resolved 💬 15 👍 16 #63873
• [MODEL] Opus 4.8 starts hallucinating results before parallel tasks finish
  Open 💬 8 👍 14 #63884
• [BUG] Automatic parallel-tool-call cancellation is indistinguishable from a user interrupt
  Resolved 💬 12 👍 9 #64047
• [BUG] Tool-call results empty in live UI then flush late/out-of-order (Bash, Read, MCP, advisor) — macOS, Opus 4.8, parallel batches
  Resolved 💬 8 👍 9 #63966
• [Bug] Stray token "count" injected before tool calls causes parse failure in Claude Code
  Open 💬 1 👍 11 #64314
• [Bug] Tool-use block markup intermittently corrupted with stray token prefix
  Open 💬 1 👍 11 #63879
• Prompt cache fully re-created after turns with many parallel tool calls (cache_read collapses to system+tools floor) — ~74% of cache writes wasted on Opus 4.8 / v2.1.15x
  Open 💬 11 👍 6 #63930
• [BUG] Enterprise-managed marketplaces in project enabledPlugins are orphaned on first run; only install after a restart
  Resolved 💬 5 👍 6 #64497
• Claude Code VS Code extension forces 1M context on Pro plan - Windows
  Resolved 💬 9 👍 4 #64349
• [BUG] Opus 4.8 medium effort spends 46k output tokens on hidden thinking for a simple coding turn
  Resolved 💬 9 👍 4 #64153
• [BUG] Notion MCP connector (both project .mcp.json and claude.ai OAuth connector) triggers 400 input_schema oneOf/allOf/anyOf error in interactive main loop
  Open 💬 1 👍 6 #84056
• Regression (since 2026-05-29): intermittent "tool call was malformed and could not be parsed" — tool_use block absent on a stop_reason=tool_use turn
  Resolved 💬 7 👍 4 #64235
• Context hit 1M token limit with no auto-compaction and no recovery path
  Resolved 💬 4 👍 5 #64037
• [Bug] Usage credits required for 1M context on Max 5x plan — standard model selected, Cowork + Claude Code
  Resolved 💬 6 👍 4 #64970
• [BUG] Repeated Bash tool-call loop during git workflow consumed session limit
  Resolved 💬 3 👍 5 #63863
• [BUG] typescript-lsp pushes stale diagnostics on 2.1.158 (post-#17979) in TS project-references/composite workspaces
  Resolved 💬 2 👍 5 #64239
• [Bug] Claude 4.8 model stuck in infinite loop executing spurious bash commands
  Resolved 💬 4 👍 4 #64279
• [MODEL] Claude confabulated a prompt-injection payload in a file before the file-read result returned
  Resolved 💬 4 👍 4 #64048
• [Bug] Claude Opus 4.8 emits malformed tool calls with parsing errors
  Resolved 💬 3 👍 4 #64097
• Harness silently executes duplicated parallel tool_use blocks: subagent fan-out runs N× the intended count (6 → 24)
  Resolved 💬 15 #64080
• [BUG] Desktop file viewer blocks files in permissions.additionalDirectories ("This file is outside the working directory") — regression
  Resolved 💬 2 👍 4 #72423
• [BUG] Windows + Git Bash: tengu_cobalt_ridge experiment silently force-enables the PowerShell tool & "Shell: PowerShell", causing wrong-shell retries (token waste)
  Resolved 💬 2 👍 4 #64253
• Server-side tool (server_tool_use) emitted but no result returned; response reports stop_reason: end_turn
  Resolved 💬 2 👍 4 #64229
• [BUG] Agent View (Linux): mouse wheel sends arrow keys instead of scrolling attached session — works on macOS, fails on all Linux terminals
  Open 💬 4 👍 3 #64214
• [Bug] Opus 4.8 responses not displayed after tool use — quota consumed with no output
  Resolved 💬 4 👍 3 #64129
• Stray "court" token emitted immediately before tool-use <invoke> tag corrupts the tool call (Opus 4.8, Claude Code 2.1.158)
  Resolved 💬 3 👍 3 #64700
• [Bug] Parallel tool calls cancel all siblings on single error, which appears to cause model confusion
  Resolved 💬 3 👍 3 #64247

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