feat: configure executor models

src/workflow-executor.test.ts

@@ -162,6 +162,46 @@ touch '${sessionFile}.meta'
     expect(result.sessionHandle?.kind).toBe("reasonix");
   });
 
+  it("start passes --model when configured", async () => {
+    const argsFile = path.join(tmpDir, "args.txt");
+    const fakeBin = writeFakeCli(tmpDir, { argsFile });
+
+    const adapter = createExecutorAdapter("reasonix");
+    await adapter.start({
+      repoRoot: tmpDir,
+      plan: makeValidPlan(),
+      runDir: tmpDir,
+      cycleIndex: 1,
+      config: { binary: fakeBin, model: "custom-reasonix-model" },
+    });
+
+    const capturedArgs = fs.existsSync(argsFile) ? fs.readFileSync(argsFile, "utf8") : "";
+    expect(capturedArgs).toContain("--model");
+    expect(capturedArgs).toContain("custom-reasonix-model");
+  });
+
+  it("resume passes --model when configured", 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: "Fix null pointer at src/index.ts",
+      handle: { kind: "reasonix", sessionFilePath: sessionFile },
+      runDir: tmpDir,
+      cycleIndex: 2,
+      config: { binary: fakeBin, model: "resume-model" },
+    });
+
+    const capturedArgs = fs.existsSync(argsFile) ? fs.readFileSync(argsFile, "utf8") : "";
+    expect(capturedArgs).toContain("--model");
+    expect(capturedArgs).toContain("resume-model");
+  });
+
   it("resume sends a complete continued plan for task-level reuse", async () => {
     const argsFile = path.join(tmpDir, "args.txt");
     const fakeBin = writeFakeCli(tmpDir, { argsFile });