[matchalatteguy]

What changes

Turns the subprocess dispatcher into a parallel, bounded local command queue. SQLite stores individual attempts, ownership, outcomes, exit codes, log paths, retry budgets, and retry due times. Finite JSON batch manifests can be loaded idempotently and resumed after fixing a failed command.

Adds cancellation, explicit retries with bounded backoff, conservative abandoned-attempt recovery, capped stdout/stderr logs, a repository-check and repair example, schema migration, and practical installation and operations guides.

Verification

• Actual parallel execution and atomic capacity claims.
• Cancellation, timeout, crash recovery, and owned process-group cleanup.
• Retry budgets, due times, attempt history, and batch identity conflicts.
• Binary and large output without blocking or unbounded log retention.
• Real repair-and-resume example from an installed wheel outside the checkout.
• Hosted Python and platform checks.

Scope and limits

The dispatcher stays alive while its commands run. Retries are explicit, and a crashed dispatcher may require operator inspection and recovery. This is a local queue with no distributed leases or exactly-once guarantee. On Python builds without waitid(WNOWAIT), successful commands must not leave background children running.