Version 2.1.33

New dedicated tools for managing agent teams, replacing the previous operation-based approach.

• TeamCreate: Creates a new team for coordinating multiple agents. Requires team_name and optional description parameters.
• TeamDelete: Removes team and task directories when swarm work is complete. Fails if the team still has active members - teammates must be terminated first.
• Error messages now reference TeamDelete instead of the generic "cleanup operation" for ending teams.

Tool definitions (search for "TeamCreate", "TeamDelete")

New hook types for agent team workflows that allow custom scripts to run at key points.

• TeammateIdle: Fires when a teammate is about to go idle. Input is JSON with teammate_name and team_name. Exit code 2 prevents idle (teammate continues working).
• TaskCompleted: Fires when a task is being marked as completed. Input is JSON with task_id, task_subject, task_description, teammate_name, and team_name. Exit code 2 prevents task completion.

Hook definitions (search for "When a teammate is about to go idle", "When a task is being marked as completed")

Automatic fallback when the streaming API endpoint returns a 404 error.

• When the streaming endpoint returns HTTP 404, Claude Code now automatically falls back to non-streaming mode
• Logs a warning: "Streaming endpoint returned 404, falling back to non-streaming mode"
• Telemetry tracks these events with error: "404_stream_creation"

Fallback logic (search for "Streaming endpoint returned 404", "404_stream_creation")

The tengu_amber_flint feature flag now defaults to true, enabling agent teams for users who set CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1.

• Previously, the feature flag defaulted to false, requiring both the env var AND server-side enablement
• Now users only need to set CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1 to use agent teams
• The system prompt note about agent teams "not available on this plan" is now conditionally hidden when teams are enabled

Feature flag change from !1 (false) to !0 (true) (search for "tengu_amber_flint")

Plan mode instructions have been completely rewritten for a more collaborative "pair-planning" experience.

• New framing: "You are pair-planning with the user"
• Introduces "The Loop" pattern: Explore → Update plan file → Ask user → repeat
• New "First Turn" guidance: Start with a quick scan, write a skeleton plan, ask initial questions
• "Asking Good Questions" section: Never ask what you could find by reading code; batch related questions; focus on things only the user can answer
• Simplified tool references: "to read code" instead of verbose tool lists

New workflow text (search for "pair-planning with the user", "First Turn")

Login-related error messages are now unified to "Not logged in · Run /login".

• Previously showed "Invalid API key · Run /login" or "Missing API key · Run /login"
• Now shows a single consistent message: "Not logged in · Run /login"

Error message strings (search for "Not logged in · Run /login")

The Opus 4.6 promotional message now includes the command to enable extra usage.

• Previous: "Opus 4.6 is here · $50 free extra usage"
• New: "Opus 4.6 is here · $50 free extra usage · /extra-usage to enable"

Promo message (search for "/extra-usage to enable")

The --session-id flag now strictly requires a valid UUID format.

• Previous: Accepted "UUID or tagged ID" (--session-id <id>)
• New: Only accepts valid UUIDs (--session-id <uuid>)
• Error message updated: "Must be a valid UUID" (removed "or tagged ID")

CLI option description (search for "--session-id <uuid>")

The Ctrl+T shortcut text now says "toggle tasks" instead of "show todos".

UI text (search for "to toggle tasks")

New descriptive status messages for teammate state changes.

• Completed: Teammate "name" completed their task.
• Stopped: Teammate "name" was stopped.
• Idle: Teammate "name" is idle and ready for new work.

Status message templates (search for "completed their task", "is idle and ready for new work")

New warning messages when enabled plugins have issues.

• Plugin "X" is enabled but not found in any known marketplace
• Plugin "X" is enabled but you chose not to install it

Plugin validation (search for "is enabled but not found in any known marketplace")

New debug logging for WebSocket errors and cancel operations.

• [SessionsWebSocket] WebSocket error - WebSocket connection errors
• [onCancel] focusedInputDialog=X streamMode=Y - Cancel operation context
• [teleportToRemote] Git source: / No repository detected - Remote session setup
• [useDeferredValue] Messages deferred by N - UI performance tracking

Debug log strings (search for "[SessionsWebSocket]", "[onCancel]")

Team-spawned agents now inherit CLAUDE_CONFIG_DIR environment variable.

Environment setup code (search for "CLAUDE_CONFIG_DIR=")

• Fixed typo in Edit tool description: "occurences" → "occurrences" (search for "Replace all occurrences")
• Improved error handling for API requests with new "Error in API request:" log format