fix(agent): invalidate flush-scan cursor at the defrag marker-pop sibling site

The micro-compaction defrag pass (_defrag_rolling_summary) rewrites the newest MICRO marker's content and pops _DB_PERSISTED_MARKER from the LIVE dict in place — the same in-place pop class finalize_turn's fill site was fixed for in #75170. Without invalidation the bounded flush-scan cursor identity-skips the rewritten marker row and the defragged rolling summary never reaches state.db (resume rehydrates a stale summary). The compressor holds no agent reference, so the pop site raises _flush_scan_cursor_invalidated and the finalize_turn micro-compaction block consumes it, setting agent._db_flush_scan_prefix = None. The module-scope pop sites (context_compressor.py:175/224) operate on fresh copies — identity-breaking by construction — and need no flag. Follow-up to #75170 (fix-the-class sweep of _DB_PERSISTED_MARKER in-place pops).
2026-07-31 21:53:53 -07:00
parent 2aaeee2ee5
commit d5463e5f6d
3 changed files with 86 additions and 0 deletions
@@ -384,6 +384,18 @@ def finalize_turn(
                ):
                    _before = len(messages)
                    _compacted = _compressor._micro_compact(messages)
+                    # Micro-compaction defrag rewrites the newest MICRO
+                    # marker's content and pops _db_persisted from the live
+                    # dict in place — the sibling of the pop site above. The
+                    # compressor has no agent reference, so it raises a flag
+                    # for us to invalidate the bounded flush-scan cursor;
+                    # otherwise the rewritten marker row is identity-skipped
+                    # and the stale summary persists to state.db.
+                    if getattr(
+                        _compressor, "_flush_scan_cursor_invalidated", False
+                    ):
+                        _compressor._flush_scan_cursor_invalidated = False
+                        agent._db_flush_scan_prefix = None
                    if isinstance(_compacted, list) and _compacted:
                        messages[:] = _compacted
                    _after = len(messages)