docs(conductor): Add context and origins block to new phase 2 specs

conductor/tracks/tiered_context_scoping_hitl_approval/spec.md

@@ -10,4 +10,16 @@ Provide the user with absolute visual control over what the AI sees at every lev
 
 ## Constraints
 -   Must adhere to the project's security and transparency mandates.
--   The interceptor must be reliable and not cause the main event loop to hang indefinitely.
+-   The interceptor must be reliable and not cause the main event loop to hang indefinitely.
+
+## Context & Origins
+This track was born from the "Human Verification" phase of the initial MMA Orchestrator prototype (`mma_orchestrator_integration_20260226`). We realized that while the backend API plumbing for the hierarchical MMA tiers (Tiers 1-4) was technically functional, the product lacked the necessary state management, UX visualization, and human-in-the-loop security gates to be usable. 
+
+**Key Takeaways from the Prototype Phase:**
+- The Tier 2 (Tech Lead) needs its own track-scoped discussion history, rather than polluting the global project history.
+- Tasks within a track require a DAG (Directed Acyclic Graph) engine to manage complex dependencies and blocking states.
+- The GUI must visualize this DAG and stream the output of individual workers directly to their associated tasks.
+- We must enforce tiered context subsetting so that Tier 3/4 workers don't receive the massive global context blob, and we need a pre-spawn approval modal so the user can intercept, review, and modify worker prompts/contexts before they execute.
+
+**Instructions for the Implementing Agent:**
+As you execute this track, ensure you maintain alignment with the other Phase 2 tracks. If you learn something that impacts the dependent tracks, please append a similar "Context Summary" to their `spec.md` files before concluding your run.