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Changelog

New Features

  • Postgres Sandbox Checkpoint Store: Added PostgresCheckpointStore for storing sandbox checkpoints directly in PostgreSQL, allowing multi-replica deployments to restore sessions without S3 or shared filesystems. Checkpoints are chunked, written transactionally, deduplicated by SHA-256 and verified on read. It is opt-in; existing checkpoint defaults are unchanged. (#11186)
  • Framework Managers as Routine Executors: Company Routines can now use the internal Product Manager or OS Manager as executors through declarations, the Routine API and human-chat configuration. Reserved manager IDs resolve only from the owning AgentOS and cannot be replaced by saved or user-defined components. Includes an optional weekly Product Manager review. (#11193)
  • Sandbox Checkpoint Retention: Sandboxes now retain the three newest checkpoints per session by default. Configure retain_checkpoints=None to preserve every checkpoint. Unpublished or superseded checkpoints are retired and deleted after the run outcome is safely stored. (#11187)

Improvements

  • Sandbox Session Cleanup: Deleting a sandbox-backed session now removes its warm computer and associated checkpoint objects after the database transaction commits. Single, bulk and user-scoped session deletion are supported without affecting sessions the caller does not own. (#11187)
  • OS Manager Specialist Visibility: Platform Builder and Platform Manager now appear as members of OS Manager in /teams and /teams/os-manager-internal. They remain excluded from the reusable application registry, top-level agent discovery and standalone agent routes. (#11198)
  • Claude Defaults to Sonnet 5.5: Claude() now defaults to claude-sonnet-5-5, replacing the deprecated claude-sonnet-4-5-20250929 before its retirement. Non-default temperature, top_p and top_k values are dropped with a warning for newer Claude models that reject those sampling parameters. This behavior applies across Anthropic, Bedrock, Foundry and Vertex providers. (#11212)

Behavior Changes

  • Checkpoint Retention: Only the three newest sandbox checkpoints are retained by default. Opening a checkpoint for an older run can now raise CheckpointObjectNotFound. Set retain_checkpoints=None to restore the previous unlimited-retention behavior. (#11187)
  • Durable Sandbox Startup Validation: AgentOS now fails at startup when a durable-queue sandbox uses the host-local default checkpoint store. Configure a checkpoint store shared by every replica, such as PostgresCheckpointStore or S3CheckpointStore. Previously this invalid configuration failed only on the first submission. (#11187)

Bug Fixes

  • Missing Sandbox Checkpoints: A committed checkpoint missing from storage now ends the turn with a clear, non-retryable error, retires the newly created computer and releases the session. Previously the run remained RUNNING, exhausted queue retries and blocked later turns on the session. (#11187)
  • Company Routine Execution: Denied status writes and failed Studio runner delegation now correctly fail the Routine. Stale archived catalog entries no longer collide with owned reserved managers. (#11193)

What's Changed

New Contributors

Full Changelog: https://github.com/agno-agi/agno/compare/v3.1.7...v3.1.8

Source: README.md, updated 2026-10-21