0.21.2 - 2026-09-23

• Backup Push Reliability: Advances the exact State Flow pin to 0.18.1. Backup replication permits one in-flight push per repository; overlapping attempts are skipped until a later accepted turn, while session shutdown waits for the active process to close. Canonical state acceptance remains independent of Git replication.
• Failure Diagnostics: Push failures warn once per streak and retain redacted Git detail in the local diagnostic log even when general logging is off; a successful push resets warning suppression. If logging fails, the warning includes the available detail instead.
• Prompt-Prefix Evidence: The State Flow v3 synthetic benchmark now measures serialized per-inference context and within-run shared prefixes, including isolated resume probes. It does not change model projection or claim provider cache gains.