feat: reuse executor sessions within Codex tasks

src/workflow-executor.test.ts

@@ -162,6 +162,31 @@ touch '${sessionFile}.meta'
     expect(result.sessionHandle?.kind).toBe("reasonix");
   });
 
+  it("resume sends a complete continued plan for task-level reuse", async () => {
+    const argsFile = path.join(tmpDir, "args.txt");
+    const fakeBin = writeFakeCli(tmpDir, { argsFile });
+    const sessionFile = path.join(tmpDir, "session.jsonl");
+    fs.writeFileSync(sessionFile, "{}\n");
+
+    const adapter = createExecutorAdapter("reasonix");
+    await adapter.resume({
+      repoRoot: tmpDir,
+      plan: makeValidPlan(),
+      acceptedFindings: "",
+      purpose: "task_plan",
+      handle: { kind: "reasonix", sessionFilePath: sessionFile },
+      runDir: tmpDir,
+      cycleIndex: 1,
+      config: { binary: fakeBin },
+    });
+
+    const capturedArgs = fs.readFileSync(argsFile, "utf8");
+    expect(capturedArgs).toContain("# Continued Task Plan: Test plan");
+    expect(capturedArgs).toContain("Do something.");
+    expect(capturedArgs).toContain("Tests pass");
+    expect(capturedArgs).not.toContain("# Fix Request");
+  });
+
   it("reports failure when binary exits with non-zero", async () => {
     const fakeBin = writeFakeCli(tmpDir, { exitCode: 1 });