Changes: Preserve incomplete work and blocker metadata for S00-020. This checkpoint does not mark implementation accepted.
Validation: Session ended with status blocked.
Blocker: Previous runner session was interrupted before submit/escalate; processes stopped. User now explicitly requests resuming development. Preserve partial artifacts, verify them in a fresh bounded remediation, and return original to a new executor only after independent review.
Task: S00-020
Agent: auto-ci-cd-5a18c8aa1b42
Role: ci-cd
Action: claim
Status: blocked
Task title: Restore access to the pinned Linux XMPP experiment toolchain
