Analyzed: March 31, 2026 leak snapshot

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Activation

src/coordinator/coordinatorMode.ts enables coordinator mode only when both conditions are true:
  • the build includes COORDINATOR_MODE
  • CLAUDE_CODE_COORDINATOR_MODE is truthy

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What changes in this mode

Coordinator mode changes both:
  • the system prompt
  • the tool context communicated to the model
The dedicated prompt in getCoordinatorSystemPrompt() tells the assistant to act as an orchestrator that delegates research, implementation, and verification to workers.

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Worker tool context

getCoordinatorUserContext() computes a worker capability summary and injects it into context. In simple mode, workers are described as having a minimal set such as Bash, Read, and Edit. Outside simple mode, the function uses ASYNC_AGENT_ALLOWED_TOOLS, removes internal worker-only tools, and can also mention MCP servers.

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Session resumption

matchSessionMode() ensures that resumed sessions re-enter or exit coordinator mode to match the stored session state. It does this by mutating CLAUDE_CODE_COORDINATOR_MODE at resume time when necessary. That is a concrete implementation detail, not just UI state.

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Scratchpad support

If the scratchpad gate is enabled and a scratchpad directory is available, the worker context tells the coordinator that workers can use that directory for durable cross-worker knowledge.