library/processes/shared/scene-context-builder overview

Assemble a "scene context" string for a subagent working on one task inside a multi-task plan. Answers four questions the subagent needs every time: where am I in the plan, who is running concurrently, what's next that I must NOT implement, and what did prior tasks already build. Extracted from the `buildSceneContext` helper in joe-habu/superbabysitter/process/subagent-tdd-loop.js (lines 69-144). Usage: ```js import { buildSceneContext } from '@a5c-ai/babysitter-library/processes/shared'; const scene = buildSceneContext({ task: plan.tasks[i], taskIndex: i, allTasks: plan.tasks, buildManifest, batchContext: null, // or { peerTasks, upcomingBatches, currentBatchIndex } in parallel mode }); ```