Claude Code 2.1.178

• [new] Added remote isolation mode when spawning agents, allowing long-running tasks to execute in a remote cloud environment as a background task.
• [new] Introduced remote_launched status for agent tasks, including associated task ID, session URL, description, prompt, and output file details.
• [changed] Marked team_name as deprecated when spawning agents; the session now uses a single implicit team.

Models & prompts

• Refined guidance around agent spawning to emphasize handling multi-part tasks inline unless the user explicitly requests a subagent.
• Updated plan mode instructions to reinforce read-only behavior except for the plan file.
• Adjusted focus mode descriptions to clarify that only the final text message is shown to the user and that intermediate tool activity is hidden.
• Added details on the DesignSync tool for reading and writing claude.ai/design projects, with guidance on handling authorization errors via /design-login or /login.

Under the hood

• Added several new environment variables for coordinator tools, design OAuth, memory resync behavior, fable bridge timeouts, and todo reminder configuration.
• Introduced new feature gates related to remote agent launches, async tool cleanup, design OAuth flows, edit tool staleness, fallback sweeps, and memory store intervals.
• Added a /v1/design backend route.

Upgrade notes

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