HarnessInstructionContext
Parameters and properties
Section titled “Parameters and properties”sandboxRequiredSandboxLeaseBorrowed sandbox of the turn, for example to read project guidance before the first request.signalRequiredAbortSignalTurn cancellation signal; honor it in asynchronous resolvers.modelRequiredAgentModelNormalized model of the agent running the turn.mcpOptionalHarnessMcpContext | undefinedAccess to the MCP servers started for this turn, present when the harness declares mcpServers. Skill instruction resolvers do not receive it.