Distillation

Date: Sep 15, 2026

• 🟡 (18:06) User supplied additional source context from the session-runner test harness. Visible technical artifacts included imports for SessionInput, SessionRunner, Tool, SessionTable, Project, and Location; constants executionID = "test-execution" and otherSessionID = SessionV2.ID.make("ses_runner_other"); mutable test controls toolExecutionsStarted, systemRemoved, and streamGate; models including compactModel; the tool node echoNode = makeLocationNode({ name: "test/session-runner-tools", layer: echo, deps: [ToolRegistry.node] }); application-node setup via AppNodeBuilder.build; and execution-row setup using expires_at: Date.now() + 60_000 and assistant_message_id: null.