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npub1zurdm6fx3kksz8f8d8y4js3mvjyu3rshlpqejr8wa8hta5tsqqeshmes7w
f442707444
Reduce the ongoing cost of the top-level-sessions experiment by collapsing its scattered maintenance surfaces without changing behavior: - pool: replace eager session_owners reconciliation (5 lifecycle call sites + retains in return_agent / invalidate_channel_sessions / model-switch paths) with a single lazy prune_session_owners() at the one read site in try_claim. Future slot-lifecycle paths can no longer forget the purge; the invariant converges at one choke point. - queue: extract pop_cancelled() / dispatch_cancelled() helpers so the three copy-pasted cancelled-batch blocks in flush_next become one-liners. - session key: drop the top_level_sessions bool param and dead thread-tag fallback from conversation_session_key; remove the redundant PromptContext.top_level_sessions field. The key is now purely data-driven from batch.conversation_root, which is only populated at queue-push when the experiment is enabled. Net -59 lines. cargo test -p buzz-acp: 530 passed; clippy and fmt clean. Disabled-mode paths degenerate identically (root=None everywhere). Co-authored-by: npub1zurdm6fx3kksz8f8d8y4js3mvjyu3rshlpqejr8wa8hta5tsqqeshmes7w <1706dde9268dad011d2769c959423b6489c88e17f841990ceee9eebed1700033@sprout-oss.stage.blox.sqprod.co> Signed-off-by: npub1zurdm6fx3kksz8f8d8y4js3mvjyu3rshlpqejr8wa8hta5tsqqeshmes7w <1706dde9268dad011d2769c959423b6489c88e17f841990ceee9eebed1700033@sprout-oss.stage.blox.sqprod.co>