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Rerun

POST 
/runs/:run_id/rerun

Re-execute a run by creating a new Run record.

Creates a fresh Run with the same dataset_version_id, run_config, and pipeline as the original. A hosted rerun is enqueued for the pipeline worker; an external rerun gets a fresh upload token instead, same split as POST /runs. The original run record is unchanged.

Checkpoint/resume in the pipeline executor handles skipping already-completed steps.

Returns 422 if the original pipeline is not one a caller may create directly, if its dataset version is no longer golden (no longer the version this dataset's metrics score), or if a locked test-plan's config no longer matches what was originally recorded. A 500 can surface if the run's own project record no longer exists.

Requires workspace_editor or workspace_admin (or platform admin).

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