Version 2.1.7

Set a custom color for the prompt bar during your current session.

/color cyan

• Available colors are configurable per session
• Color is persisted in the session file and can be used to visually distinguish multiple concurrent Claude Code sessions
• Sets the standaloneAgentContext.color property

VQ9 at line 466161 (color command handler, contains "Set the prompt bar color for this session")

Claude Code can now speculatively execute tool calls while waiting for user input, using isolated git clones to avoid affecting your working directory.

• Creates temporary speculation-clones/speculation-{id} directories for isolated execution
• Uses git clone --shared --no-checkout for fast, lightweight cloning
• Tracks time saved and tools executed via tengu_speculation telemetry
• Changes from accepted speculations are copied back to the main worktree
• Read operations outside git root are allowed; writes outside git root are blocked
• Speculation aborts cleanly on user input or errors
• Displays time saved indicator (e.g., ▶▶ 5s) when speculation completes

g19() at line 460815 (speculation entry point, contains "speculation-clones")

Pro users who hadn't set a model preference are automatically migrated to Opus 4.5, with a notification displayed.

• Only triggers for first-party auth users
• Shows "Model updated to Opus 4.5" notification on next session start
• Migration only occurs once, tracked via opusProMigrationComplete state

ww9() at line 539875 (migration logic), Xq9() at line 533528 (notification display, contains "Model updated to Opus 4.5")

Added a new claude-in-chrome skill that enables browser automation tools via the Skill tool.

• Provides comprehensive guidance for browser automation including GIF recording, console log debugging, and dialog handling
• Controlled by tengu_chrome_auto_enable feature flag
• Must invoke skill before using mcp__claude-in-chrome__* tools
• Includes instructions for tab context management and session startup

TI9() at line 516042 (skill registration, contains "claude-in-chrome")

Compaction now includes retry logic when streaming responses fail.

• Controlled by tengu_compact_streaming_retry feature flag
• Retries up to 3 times with exponential backoff
• Improved error message: "Compaction interrupted · This may be due to network issues — please try again."
• Logs retry attempts and final failure for diagnostics

H97() at line 449946 (compaction handler, contains "tengu_compact_streaming_retry")

Better crash and shutdown diagnostics through telemetry.

• Now logs shutdown_signal events for SIGINT/SIGTERM
• Captures uncaught_exception with error name and truncated message
• Captures unhandled_rejection for promise rejections
• All error messages are truncated to 2000 characters

yJ at line 317867 (signal handlers, contains "shutdown_signal", "uncaught_exception")

Keybindings configuration now includes JSON schema and documentation references.

• New $schema field pointing to https://code.claude.com/docs/schemas/keybindings.json
• New $docs field linking to https://code.claude.com/docs/s/claude-code-keybindings
• Reserved (non-rebindable) keys are now filtered from generated config

R29() at line 473546 (keybindings generator, contains "$schema")

Logs discovered tools found in message history when resuming sessions.

• Scans tool_result blocks in user messages for tool names
• Logs count of discovered tools for debugging dynamic tool loading behavior

_Z0() at line 279909 (tool discovery, contains "Dynamic tool loading")

Plugins can now force a specific output style for the session.

• Plugins can set forceForPlugin: true on their output style
• If multiple plugins force styles, a warning is logged and the first is used
• Takes precedence over user-configured output style

sY9() at line 508208 (output style selection, contains "forceForPlugin")

Filters out orphaned assistant thinking blocks that don't have associated content.

• Removes assistant messages that contain only thinking/redacted_thinking blocks
• Logs filtered messages via tengu_filtered_orphaned_thinking_message telemetry
• Prevents display issues from incomplete responses

Su2() at line 510058 (filtering logic, contains "tengu_filtered_orphaned_thinking")

System context is now prefetched more intelligently based on trust status.

• In non-interactive sessions, prefetch runs immediately
• In interactive sessions, only prefetches if trust has been established
• Logs prefetch status via prefetch_system_context_* telemetry events

tR7() at line 543352 (prefetch logic, contains "prefetch_system_context")

Worktree snapshotting now detects in-progress git operations and provides clearer errors.

• Detects cherry-pick, rebase, merge, revert, am, and bisect operations
• Throws descriptive error: "Cannot snapshot worktree: in-progress {operation} operation detected"
• Also detects uninitialized repositories and prompts for initial commit

a77() at line 458650 (conflict detection, contains "cherry-picking", "rebasing")

File path resolution now follows symlink chains more thoroughly.

• Follows up to 40 levels of symlinks (protection against infinite loops)
• Skips special file types (FIFO, socket, character/block devices)
• Returns all paths in the symlink chain for better tracking

pAA() at line 2374 (symlink resolution, contains "isSymbolicLink")

• Fixed "File has been unexpectedly modified" error message to be more actionable (ZRA at line 170468)
• Improved request size error messaging for non-interactive mode (hs8() at line 278885, contains "Request too large")

Feature-flagged

Optional enhanced telemetry collection for debugging and analytics.

• Controlled by CLAUDE_CODE_ENHANCED_TELEMETRY_BETA or ENABLE_ENHANCED_TELEMETRY_BETA env var
• Also gated by enhanced_telemetry_beta feature flag (defaults to false)

uI0 at line 303463 (feature definition, contains "enhanced_telemetry_beta")