Document conversation capture and continuation contracts

docs/consumers/pkg-promptkit.md

@@ -697,6 +697,10 @@ its opaque rendered-prompt hash before invoking `RunPrepared`.
 
 ### Capture And Continue A Conversation
 
+The [request GoDoc](../../types.go), [exchange GoDoc](../../exchange.go), and
+[prepared-execution GoDoc](../../prepared_execution.go) own the exact capture,
+continuation, inspection, and lifetime contracts.
+
 Capture records the messages actually executed and the final assistant content.
 An exchange is an immutable in-process capability; `Details()` returns detached,
 encodable history that may contain sensitive content. Ordinary result encoding

docs/roadmap/remediation.md

@@ -43,7 +43,11 @@ group members on each incremental update.
 
 ## 1. Complete The Public Exchange Capture And Continuation Contract
 
-**Priority:** P2. **Status:** Open. **Plan stage:** 13.
+**Priority:** P2. **Status:** Complete. **Plan stage:** 13.
+
+**Completion:** Expanded the public request, exchange, details, and prepared-handle
+GoDoc and linked the consumer walkthrough to those owners. Checked comments
+against capture, preparation, and repair behavior; local links and diff verified.
 
 **Locations:** [request fields](../../types.go),
 [exchange declarations and accessor](../../exchange.go), and