[THardy98]

Summary

• Update the API subtree from the agreed sticky-activity branch.
• Add opt-in session workers, per-activity workflow-sticky routing, and shared workflow/activity polling coordination.
• Add separately committed experimental stable sticky queue names and single-workflow polling controls.

Review plan

Draft for CI and scope review. Python will be reviewed first, followed by the Core changes. No further Core changes are planned before that review.

Validation

• Core unit suite: 545 passed, 2 ignored.
• Workspace lint passed.
• Full test lint was blocked locally by nested Cargo configuration conflicts.
• Client tests: 189 passed; one failed because of the local UNIX socket path length.
• Live-server affinity, retry routing, and server rate-limit behavior have not been validated.

Open in Delta

[THardy98]

API prerequisite extracted to #1679. This draft now targets dev/sticky-activity-api, so Files changed shows only the general activity-session support and experimental affinity controls. No source changes or history rewrites were made; Python’s Core pin remains unchanged. After #1679 lands, retarget this draft to main.

[THardy98]

Superseded by #1687, stacked on the behavior-preserving extraction #1686. The replacement starts with the revised session API import and will grow in small reviewed steps. This branch is retained so existing Python Core pins remain available.