{"repo":"NousResearch/hermes-agent","public_id":"115493","display_label":"undo/retry broken after turns with no assistant reply","summary":"A bug where /undo and /retry become permanently unavailable after a turn that receives no assistant reply. Multiple fix attempts address rewind logic interacting with history state and in-memory merges.","subsystem":null,"counts":{"members":4,"open_issues":0,"open_issues_distinct":0,"open_prs":0,"closed_issues":1,"merged_prs":1,"attempt_prs":2},"landed_fix":{"status":"merged_to_main","basis":"structural","pr":116975,"merged_at":"2026-09-20T19:12:27+00:00"},"resolution":{"state":"resolved","by":"pr-116975"},"freshness":{"state":"verified","last_verified_at":"2026-09-20T19:12:27+00:00","is_stale":false},"grouping":{"backbone":"STRUCTURAL_SPANNING","link_density":0.6666666666666666},"fix_edges":[{"issue_number":115493,"pr_number":116975,"tier":"verified","basis":"closing_ref","confidence":0.95,"recoverable_from_timeline":true,"pr_merged_at":"2026-09-20T19:12:27+00:00"}],"members":[{"kind":"issue","number":115493,"title":"[Bug]: /undo and /retry are dead for the rest of a session after a turn ends with no assistant reply (\"session history changed before the rewind could be persisted\")","url":null,"state":"closed"},{"kind":"pr","number":115503,"title":"fix(state): rewind sees through an in-memory user-merge before the history guard","url":null,"state":"closed","close_reason":{"refs":[{"kind":"pr","value":"#115511","number":115511}],"category":"superseded_by_pr","implication":"superseded"},"merged":false},{"kind":"pr","number":115511,"title":"fix(state): align rewind with repaired alternation on unanswered turns (#115493)","url":null,"state":"closed","close_reason":{"refs":[{"kind":"commit","value":"ad01b93b2644","number":0},{"kind":"pr","value":"#116975","number":116975},{"kind":"pr","value":"#115493","number":115493},{"kind":"pr","value":"#115511","number":115511}],"category":"implemented_elsewhere","implication":"superseded"},"merged":false},{"kind":"pr","number":116975,"title":"fix(state): /undo and /retry work again after a turn that got no reply (#115493, salvage #115511)","url":null,"state":"merged","close_reason":{"category":"merged"},"merged":true,"is_fix_pr":true,"fix_tier":"verified","files_changed":["hermes_state_rewind.py","tests/gateway/test_undo_rewind_session.py","tests/hermes_state/test_rewind_surfaces_invariant.py"]}],"trust":{"default_tier":"verified","includes_suggested":false}}