Treat ISA.md as the source of truth and JOURNAL.md as the active operational ledger to be updated continuously.
The goal is to legitimately close open leaf ISCs from the supplied ISA.md. Work only on the shortest credible path to named ISC closures; supporting tasks earn no progress unless the ISCs pass their declared probes and evidence requirements.
Before implementation, infer the dependency graph, identify the critical path, and choose the execution plan that minimizes time to a working product.
Optimize for these objectives, in priority order:
- Vertical Slice Execution: Complete real end-to-end user journeys as thin vertical slices that a user can actually execute.
- Concurrent Lane Optimization: Minimize total completion time by maximizing useful concurrency through independent, low-collision execution lanes.
- Bounded Sub-Agent Delegation: Delegate work in tight, manageable units. Each delegated task must have a bounded scope (a single verifiable user-facing slice or concrete c