diff --git a/src/cli/acp-cli.option-collisions.test.ts b/src/cli/acp-cli.option-collisions.test.ts
index 820467ba5a4..667720762da 100644
--- a/src/cli/acp-cli.option-collisions.test.ts
+++ b/src/cli/acp-cli.option-collisions.test.ts
@@ -12,6 +12,8 @@ const defaultRuntime = {
   writeStdout: vi.fn(),
   writeJson: vi.fn(),
   exit: vi.fn(),
+  writeStdout: vi.fn(),
+  writeJson: vi.fn(),
 };
 
 const passwordKey = () => ["pass", "word"].join("");
diff --git a/src/cli/config-cli.test.ts b/src/cli/config-cli.test.ts
index 9a699856575..148dcfa84d5 100644
--- a/src/cli/config-cli.test.ts
+++ b/src/cli/config-cli.test.ts
@@ -39,12 +39,13 @@ vi.mock("../runtime.js", async (importOriginal) => {
   return {
     ...actual,
     defaultRuntime: {
+      ...actual.defaultRuntime,
       log: (...args: unknown[]) => mockLog(...args),
       error: (...args: unknown[]) => mockError(...args),
+      exit: (code: number) => mockExit(code),
       writeStdout: (value: string) => mockLog(value.endsWith("\n") ? value.slice(0, -1) : value),
       writeJson: (value: unknown, space = 2) =>
         mockLog(JSON.stringify(value, null, space > 0 ? space : undefined)),
-      exit: (code: number) => mockExit(code),
     },
   };
 });
diff --git a/src/cli/cron-cli.test.ts b/src/cli/cron-cli.test.ts
index 4988af09a1a..97cd89b963b 100644
--- a/src/cli/cron-cli.test.ts
+++ b/src/cli/cron-cli.test.ts
@@ -34,6 +34,8 @@ vi.mock("../runtime.js", () => ({
     exit: (code: number) => {
       throw new Error(`__exit__:${code}`);
     },
+    writeStdout: vi.fn(),
+    writeJson: vi.fn(),
   },
 }));
 
diff --git a/src/cli/daemon-cli/install.integration.test.ts b/src/cli/daemon-cli/install.integration.test.ts
index 52272b61f55..dbdf2924905 100644
--- a/src/cli/daemon-cli/install.integration.test.ts
+++ b/src/cli/daemon-cli/install.integration.test.ts
@@ -37,6 +37,9 @@ vi.mock("../../runtime.js", () => ({
     exit: (code: number) => {
       throw new Error(`__exit__:${code}`);
     },
+    writeStdout: (value: string) => runtimeLogs.push(value),
+    writeJson: (value: unknown, space = 2) =>
+      runtimeLogs.push(JSON.stringify(value, null, space > 0 ? space : undefined)),
   },
 }));
 
diff --git a/src/cli/daemon-cli/test-helpers/lifecycle-core-harness.ts b/src/cli/daemon-cli/test-helpers/lifecycle-core-harness.ts
index 84e3611b6da..7ecf4aac9ab 100644
--- a/src/cli/daemon-cli/test-helpers/lifecycle-core-harness.ts
+++ b/src/cli/daemon-cli/test-helpers/lifecycle-core-harness.ts
@@ -27,15 +27,15 @@ export const defaultRuntime: LifecycleRuntimeHarness = {
     runtimeLogs.push(args.map((arg) => String(arg)).join(" "));
   },
   error: vi.fn(),
+  exit: vi.fn((code: number) => {
+    throw new Error(`__exit__:${code}`);
+  }),
   writeStdout: vi.fn((value: string) => {
     runtimeLogs.push(value.endsWith("\n") ? value.slice(0, -1) : value);
   }),
   writeJson: vi.fn((value: unknown, space = 2) => {
     runtimeLogs.push(JSON.stringify(value, null, space > 0 ? space : undefined));
   }),
-  exit: vi.fn((code: number) => {
-    throw new Error(`__exit__:${code}`);
-  }),
 };
 
 export const service: LifecycleServiceHarness = {
diff --git a/src/cli/devices-cli.test.ts b/src/cli/devices-cli.test.ts
index bf3627fc72e..4abc7c77c75 100644
--- a/src/cli/devices-cli.test.ts
+++ b/src/cli/devices-cli.test.ts
@@ -21,6 +21,8 @@ const runtime = {
     runtime.log(JSON.stringify(value, null, space > 0 ? space : undefined));
   }),
   exit: vi.fn(),
+  writeStdout: vi.fn((value: string) => runtime.log(value)),
+  writeJson: vi.fn((value: unknown, space = 2) => runtime.log(JSON.stringify(value, null, space))),
 };
 
 vi.mock("../gateway/call.js", () => ({
diff --git a/src/cli/directory-cli.test.ts b/src/cli/directory-cli.test.ts
index f2e2208bf54..0a1dca095ea 100644
--- a/src/cli/directory-cli.test.ts
+++ b/src/cli/directory-cli.test.ts
@@ -43,6 +43,8 @@ vi.mock("../runtime.js", () => ({
     writeJson: (value: unknown, space = 2) =>
       mocks.log(JSON.stringify(value, null, space > 0 ? space : undefined)),
     exit: (...args: unknown[]) => mocks.exit(...args),
+    writeStdout: (...args: unknown[]) => mocks.log(...args),
+    writeJson: (value: unknown, space = 2) => mocks.log(JSON.stringify(value, null, space)),
   },
 }));
 
diff --git a/src/cli/mcp-cli.test.ts b/src/cli/mcp-cli.test.ts
index eb2f0fbdb73..3ab25e2603b 100644
--- a/src/cli/mcp-cli.test.ts
+++ b/src/cli/mcp-cli.test.ts
@@ -19,6 +19,8 @@ vi.mock("../runtime.js", () => ({
     writeJson: (value: unknown, space = 2) =>
       mockLog(JSON.stringify(value, null, space > 0 ? space : undefined)),
     exit: (code: number) => mockExit(code),
+    writeStdout: (value: string) => mockLog(value),
+    writeJson: (value: unknown, space = 2) => mockLog(JSON.stringify(value, null, space)),
   },
 }));
 
diff --git a/src/cli/memory-cli.test.ts b/src/cli/memory-cli.test.ts
index 0a09d882ea1..ac55bd07cce 100644
--- a/src/cli/memory-cli.test.ts
+++ b/src/cli/memory-cli.test.ts
@@ -59,7 +59,11 @@ afterEach(() => {
 
 describe("memory cli", () => {
   function spyRuntimeLogs() {
-    return vi.spyOn(defaultRuntime, "log").mockImplementation(() => {});
+    const logSpy = vi.spyOn(defaultRuntime, "log").mockImplementation(() => {});
+    vi.spyOn(defaultRuntime, "writeJson").mockImplementation((value: unknown, space = 2) => {
+      logSpy(JSON.stringify(value, null, space));
+    });
+    return logSpy;
   }
 
   function spyRuntimeJson() {
diff --git a/src/cli/qr-cli.test.ts b/src/cli/qr-cli.test.ts
index c7d54a6247a..3a156da756a 100644
--- a/src/cli/qr-cli.test.ts
+++ b/src/cli/qr-cli.test.ts
@@ -15,6 +15,10 @@ const mocks = vi.hoisted(() => ({
     exit: vi.fn(() => {
       throw new Error("exit");
     }),
+    writeStdout: vi.fn((value: string) => mocks.runtime.log(value)),
+    writeJson: vi.fn((value: unknown, space = 2) =>
+      mocks.runtime.log(JSON.stringify(value, null, space)),
+    ),
   },
   loadConfig: vi.fn(),
   runCommandWithTimeout: vi.fn(),
diff --git a/src/cli/route.test.ts b/src/cli/route.test.ts
index a335f4f56e9..4a65bcfc24f 100644
--- a/src/cli/route.test.ts
+++ b/src/cli/route.test.ts
@@ -26,9 +26,9 @@ vi.mock("../runtime.js", () => ({
   defaultRuntime: {
     error: vi.fn(),
     log: vi.fn(),
+    exit: vi.fn(),
     writeStdout: vi.fn(),
     writeJson: vi.fn(),
-    exit: vi.fn(),
   },
 }));
 
diff --git a/src/cli/test-runtime-capture.ts b/src/cli/test-runtime-capture.ts
index 6ff5df0b0de..921693e572e 100644
--- a/src/cli/test-runtime-capture.ts
+++ b/src/cli/test-runtime-capture.ts
@@ -30,6 +30,12 @@ export function createCliRuntimeCapture(): CliRuntimeCapture {
       exit: (code: number) => {
         throw new Error(`__exit__:${code}`);
       },
+      writeStdout: (value: string) => {
+        runtimeLogs.push(value);
+      },
+      writeJson: (value: unknown, space = 2) => {
+        runtimeLogs.push(JSON.stringify(value, null, space > 0 ? space : undefined));
+      },
     },
     resetRuntimeCapture: () => {
       runtimeLogs.length = 0;
diff --git a/src/cli/update-cli.option-collisions.test.ts b/src/cli/update-cli.option-collisions.test.ts
index e38b38184aa..d1ec19cb85e 100644
--- a/src/cli/update-cli.option-collisions.test.ts
+++ b/src/cli/update-cli.option-collisions.test.ts
@@ -16,6 +16,8 @@ const defaultRuntime = {
     defaultRuntime.log(JSON.stringify(value, null, space));
   }),
   exit: vi.fn(),
+  writeStdout: vi.fn(),
+  writeJson: vi.fn(),
 };
 
 vi.mock("./update-cli/update-command.js", () => ({
diff --git a/src/cli/update-cli.test.ts b/src/cli/update-cli.test.ts
index b38e2c4075f..1433c25e5ee 100644
--- a/src/cli/update-cli.test.ts
+++ b/src/cli/update-cli.test.ts
@@ -139,11 +139,11 @@ vi.mock("../runtime.js", () => ({
   defaultRuntime: {
     log: runtimeLog,
     error: runtimeError,
+    exit: runtimeExit,
     writeStdout: vi.fn((value: string) =>
       runtimeLog(value.endsWith("\n") ? value.slice(0, -1) : value),
     ),
     writeJson: runtimeWriteJson,
-    exit: runtimeExit,
   },
 }));
 
diff --git a/test/fixtures/test-parallel.behavior.json b/test/fixtures/test-parallel.behavior.json
index 2c5ea493022..4f70139a013 100644
--- a/test/fixtures/test-parallel.behavior.json
+++ b/test/fixtures/test-parallel.behavior.json
@@ -35,30 +35,14 @@
         "file": "src/cron/isolated-agent/run.cron-model-override.test.ts",
         "reason": "Measured ~25% faster under threads than forks on this host while keeping the file green."
       },
-      {
-        "file": "src/cron/isolated-agent/run.skill-filter.test.ts",
-        "reason": "Measured ~15% faster under threads than forks on this host while keeping the file green."
-      },
       {
         "file": "src/cron/isolated-agent/run.owner-auth.test.ts",
         "reason": "Measured ~19% faster under threads than forks on this host while keeping the file green."
       },
-      {
-        "file": "src/cron/isolated-agent.lane.test.ts",
-        "reason": "Measured ~14% faster under threads than forks on this host while keeping the file green."
-      },
-      {
-        "file": "src/cron/isolated-agent.direct-delivery-forum-topics.test.ts",
-        "reason": "Measured ~11% faster under threads than forks on this host while keeping the file green."
-      },
       {
         "file": "src/cron/isolated-agent.auth-profile-propagation.test.ts",
         "reason": "Measured ~22% faster under threads than forks on this host while keeping the file green."
       },
-      {
-        "file": "src/cron/isolated-agent.delivers-response-has-heartbeat-ok-but-includes.test.ts",
-        "reason": "Measured ~12% faster under threads than forks on this host while keeping the file green."
-      },
       {
         "file": "src/cron/isolated-agent/delivery-dispatch.named-agent.test.ts",
         "reason": "Measured ~14% faster under threads than forks on this host while keeping the file green."
@@ -67,30 +51,6 @@
         "file": "src/cron/isolated-agent.subagent-model.test.ts",
         "reason": "Measured ~21% faster under threads than forks on this host while keeping the file green."
       },
-      {
-        "file": "src/cron/service.store-load-invalid-main-job.test.ts",
-        "reason": "Measured ~16% faster under threads than forks on this host while keeping the file green."
-      },
-      {
-        "file": "src/cron/service.store-migration.test.ts",
-        "reason": "Measured ~14% faster under threads than forks on this host while keeping the file green."
-      },
-      {
-        "file": "src/cron/service.failure-alert.test.ts",
-        "reason": "Measured ~17% faster under threads than forks on this host while keeping the file green."
-      },
-      {
-        "file": "src/cron/service.persists-delivered-status.test.ts",
-        "reason": "Measured ~15% faster under threads than forks on this host while keeping the file green."
-      },
-      {
-        "file": "src/cron/session-reaper.test.ts",
-        "reason": "Measured ~12% faster under threads than forks on this host while keeping the file green."
-      },
-      {
-        "file": "src/cron/service.session-reaper-in-finally.test.ts",
-        "reason": "Measured ~21% faster under threads than forks on this host while keeping the file green."
-      },
       {
         "file": "src/infra/outbound/deliver.test.ts",
         "reason": "Terminates cleanly under threads, but not process forks on this host."