subagent-driven-development

# Subagent-Driven Development Use fresh context to reduce author bias, while keeping the plan and evidence as the shared contract. ## Before dispatch - Confirm the design and implementation plan are approved. - Create or select an isolated workspace when concurrent edits need it. - Split the plan into tasks with disjoint ownership and explicit interfaces. - Define the focused test and review gate for each task. - Prepare a compact handoff packet from [handoff-packet.md](references/handoff-packet.md). Include verified facts and portable anchors, not a full conversation dump or the expected solution. ## Per-task cycle 1. Give the implementer the handoff packet, repository rules, and only the context needed for the task. Ask it to edit the files directly and report evidence. 2. Inspect the implementation diff and run the focused test yourself. 3. Give a fresh reviewer the task contract, diff, and test output—not the implementer's private reasoning or your expected answer. 4. Validate every finding against the real code path. 5. Fix in scope, rerun proof, and only then dispatch the next task. If a task reveals a design contradiction, stop and return to `solution-design`/`implementation-planning`; do not make the subagent silently redesign the system. Keep unrelated agents independent and close them when finished. ## Integration The coordinator owns final interfaces, conflict resolution, broader tests, and the completion claim. Agent success is an input, never...