core: prevent duplicate user messages in ACP clients (#22468)

2026-04-14 11:37:33 -05:00
parent a8f9f6b705
commit b1312a3181
2 changed files with 46 additions and 0 deletions
--- a/packages/opencode/src/acp/agent.ts
+++ b/packages/opencode/src/acp/agent.ts
@@ -453,6 +453,12 @@ export namespace ACP {
                return
            }
          }
+          
+          // ACP clients already know the prompt they just submitted, so replaying
+          // live user parts duplicates the message. We still replay user history in
+          // loadSession() and forkSession() via processMessage().
+          if (part.type !== "text" && part.type !== "file") return
+
          return
        }