Task Cycle — Burn Down the Ready Backlog

Drive ready `todo` tasks to `done`. Reads the dependency-respecting ready-set from the tasks.sh helper, claims each task (todo -> in progress), and delegates implementation to a task-worker subagent (strict TDD, verify, commit) — dispatched on the model tier the task's `complexity` frontmatter maps to (project-overridable via the .workflow-overrides/model-map file), with one escalation retry at the next tier up when a worker fails. With one worker it works in-place sequentially; with more it implements in parallel git worktrees and delegates sequential merge-back to the integrator subagent (bounce-on-conflict). The orchestrator owns every status write. Takes [<limit>|all]…