Fix Codex tool-use transcript completion

packages/adapters/codex-local/src/ui/parse-stdout.test.ts

@@ -0,0 +1,83 @@
+import { describe, expect, it } from "vitest";
+import { parseCodexStdoutLine } from "./parse-stdout.js";
+
+describe("parseCodexStdoutLine", () => {
+  it("marks completed tool_use items as resolved tool results", () => {
+    const started = parseCodexStdoutLine(JSON.stringify({
+      type: "item.started",
+      item: {
+        id: "tool-1",
+        type: "tool_use",
+        name: "search",
+        input: { query: "paperclip" },
+      },
+    }), "2026-04-08T12:00:00.000Z");
+
+    const completed = parseCodexStdoutLine(JSON.stringify({
+      type: "item.completed",
+      item: {
+        id: "tool-1",
+        type: "tool_use",
+        name: "search",
+        status: "completed",
+      },
+    }), "2026-04-08T12:00:01.000Z");
+
+    expect(started).toEqual([{
+      kind: "tool_call",
+      ts: "2026-04-08T12:00:00.000Z",
+      name: "search",
+      toolUseId: "tool-1",
+      input: { query: "paperclip" },
+    }]);
+    expect(completed).toEqual([{
+      kind: "tool_result",
+      ts: "2026-04-08T12:00:01.000Z",
+      toolUseId: "tool-1",
+      content: "search completed",
+      isError: false,
+    }]);
+  });
+
+  it("keeps explicit tool_result payloads authoritative after tool_use completion", () => {
+    const completed = parseCodexStdoutLine(JSON.stringify({
+      type: "item.completed",
+      item: {
+        id: "tool-2",
+        type: "tool_result",
+        tool_use_id: "tool-1",
+        content: "final payload",
+        status: "completed",
+      },
+    }), "2026-04-08T12:00:02.000Z");
+
+    expect(completed).toEqual([{
+      kind: "tool_result",
+      ts: "2026-04-08T12:00:02.000Z",
+      toolUseId: "tool-1",
+      content: "final payload",
+      isError: false,
+    }]);
+  });
+
+  it("marks failed completed tool_use items as error results", () => {
+    const completed = parseCodexStdoutLine(JSON.stringify({
+      type: "item.completed",
+      item: {
+        id: "tool-3",
+        type: "tool_use",
+        name: "write_file",
+        status: "error",
+        error: { message: "permission denied" },
+      },
+    }), "2026-04-08T12:00:03.000Z");
+
+    expect(completed).toEqual([{
+      kind: "tool_result",
+      ts: "2026-04-08T12:00:03.000Z",
+      toolUseId: "tool-3",
+      content: "permission denied",
+      isError: true,
+    }]);
+  });
+});

packages/adapters/codex-local/src/ui/parse-stdout.ts

@@ -118,6 +118,52 @@ function parseFileChangeItem(item: Record<string, unknown>, ts: string): Transcr
   return [{ kind: "system", ts, text: `file changes: ${preview}${more}` }];
 }
 
+function parseToolUseItem(
+  item: Record<string, unknown>,
+  ts: string,
+  phase: "started" | "completed",
+): TranscriptEntry[] {
+  const name = asString(item.name, "unknown");
+  const toolUseId = asString(item.id, name || "tool_use");
+
+  if (phase === "started") {
+    return [{
+      kind: "tool_call",
+      ts,
+      name,
+      toolUseId,
+      input: item.input ?? {},
+    }];
+  }
+
+  const status = asString(item.status);
+  const isError =
+    item.is_error === true ||
+    status === "failed" ||
+    status === "errored" ||
+    status === "error" ||
+    status === "cancelled";
+  const rawContent =
+    item.content ??
+    item.output ??
+    item.result ??
+    item.error ??
+    item.message;
+  const content =
+    asString(rawContent) ||
+    errorText(rawContent) ||
+    stringifyUnknown(rawContent) ||
+    `${name} ${isError ? "failed" : "completed"}`;
+
+  return [{
+    kind: "tool_result",
+    ts,
+    toolUseId,
+    content,
+    isError,
+  }];
+}
+
 function parseCodexItem(
   item: Record<string, unknown>,
   ts: string,
@@ -146,13 +192,7 @@ function parseCodexItem(
   }
 
   if (itemType === "tool_use") {
-    return [{
+    return parseToolUseItem(item, ts, phase);
-      kind: "tool_call",
-      ts,
-      name: asString(item.name, "unknown"),
-      toolUseId: asString(item.id),
-      input: item.input ?? {},
-    }];
   }
 
   if (itemType === "tool_result" && phase === "completed") {

ui/src/lib/issue-chat-messages.test.ts

@@ -130,6 +130,43 @@ describe("buildAssistantPartsFromTranscript", () => {
     ]);
   });
 
+  it("treats a completed tool-only segment as resolved once a tool_result arrives", () => {
+    const result = buildAssistantPartsFromTranscript([
+      { kind: "thinking", ts: "2026-04-06T12:00:00.000Z", text: "Checking the task." },
+      {
+        kind: "tool_call",
+        ts: "2026-04-06T12:00:01.000Z",
+        name: "search",
+        toolUseId: "tool-1",
+        input: { query: "paperclip" },
+      },
+      {
+        kind: "tool_result",
+        ts: "2026-04-06T12:00:02.000Z",
+        toolUseId: "tool-1",
+        content: "search completed",
+        isError: false,
+      },
+      { kind: "assistant", ts: "2026-04-06T12:00:03.000Z", text: "Found the relevant code." },
+    ]);
+
+    expect(result.parts).toMatchObject([
+      { type: "reasoning", text: "Checking the task." },
+      {
+        type: "tool-call",
+        toolCallId: "tool-1",
+        toolName: "search",
+        result: "search completed",
+        isError: false,
+      },
+      { type: "text", text: "Found the relevant code." },
+    ]);
+    expect(result.segments).toEqual([{
+      startMs: new Date("2026-04-06T12:00:00.000Z").getTime(),
+      endMs: new Date("2026-04-06T12:00:02.000Z").getTime(),
+    }]);
+  });
+
   it("keeps run errors while suppressing init and system transcript noise", () => {
     const result = buildAssistantPartsFromTranscript([
       {