fix: preserve interaction replies across chat recovery

src/sessions/interaction-delivery-reconciliation.ts

@@ -0,0 +1,30 @@
+import type { InteractionRequest } from "../chat/interaction-request-contract.js";
+import type { OpencodeRuntimeAdapter } from "../runtime/opencode.js";
+import type { SessionWorkspaceContext } from "../runtime/conversationWorkspace.js";
+import { InteractionRequestError, type InteractionRequestStore } from "./interaction-request-store.js";
+
+export async function reconcileInteractionDelivery(
+  context: SessionWorkspaceContext,
+  record: InteractionRequest,
+  store: InteractionRequestStore,
+  runtime?: Pick<OpencodeRuntimeAdapter, "agentMessageState" | "readInteractionResult">,
+  running = false
+): Promise<InteractionRequest> {
+  if (running || !runtime || !record.delivery || !["answered", "skipped"].includes(record.status)
+    || ["delivered", "cancelled"].includes(record.delivery.status)) return record;
+  try {
+    if (await runtime.agentMessageState(context.sessionId, record.delivery.native_message_id) !== "delivered") return record;
+    // Receipt recovery requires completed output, not merely a consumed input or partial text.
+    if (!(await runtime.readInteractionResult(context.sessionId, record.delivery.native_message_id)).trim()) return record;
+  } catch { return record; }
+  try {
+    return await store.updateDelivery(context, record.interaction_id, {
+      expected_revision: record.delivery.revision, status: "delivered", response_id: record.delivery.response_id
+    });
+  } catch (error) {
+    if (error instanceof InteractionRequestError && ["revision_conflict", "delivery_resolved"].includes(error.code)) {
+      return await store.get(context, record.interaction_id) ?? record;
+    }
+    throw error;
+  }
+}