Handle repetitive Semantic Consolidator output loops

docs/architecture.md

@@ -375,6 +375,22 @@ extraction results into `meeting_protocol.md` for technical validation. The
 planned architecture separates Canonical Meeting Knowledge from the final Output
 Views documented in `output-views.md`.
 
+## Semantic Consolidator failure handling
+
+Semantic Consolidator V0 preserves every raw model response before parsing.
+Its normal path accepts parseable grouping JSON and leaves duplicate source-ID
+and missing-source-ID correction to the existing deterministic coverage
+repair.
+
+An invalid or truncated response is not retried by default. One controlled
+retry is allowed only when deterministic inspection finds at least three
+consecutive complete groups with an identical structural signature:
+`canonical_text`, ordered `source_item_ids` and `merge_reason`. The retry keeps
+the same model, temperature, context window and generation limit and adds only
+an instruction not to emit an identical group more than once. Both attempts
+and the detected repetition metadata are preserved. If the retry also fails,
+the stage fails normally; it does not make another LLM call.
+
 ---
 
 # Next Milestone