diff --git a/tools/ai-cli-dispatch/src/cli.ts b/tools/ai-cli-dispatch/src/cli.ts
index 328e714..080692e 100644
--- a/tools/ai-cli-dispatch/src/cli.ts
+++ b/tools/ai-cli-dispatch/src/cli.ts
@@ -1,7 +1,14 @@
 import minimist from "minimist";
 import { detectClients as realDetectClients } from "./detect.js";
 import { executePrompt as realExecutePrompt } from "./execute.js";
-import { startJob as realStartJob } from "./jobs.js";
+import {
+  startJob as realStartJob,
+  getJob as realGetJob,
+  getJobResult as realGetJobResult,
+  cancelJob as realCancelJob,
+  listJobs as realListJobs,
+  cleanupJobs as realCleanupJobs,
+} from "./jobs.js";
 import { resolveClient as realResolveClient } from "./dispatch.js";
 import { resolveConfig as realResolveConfig } from "./config.js";
 import { CLIENT_NAMES } from "./constants.js";
@@ -11,6 +18,7 @@ import {
   type ExecResult,
   type DebugInfo,
   type Job,
+  type JobStatus,
   ClientNotFoundError,
 } from "./types.js";
 
@@ -33,6 +41,29 @@ export interface CliDeps {
   resolveConfig?: () => { paths: Partial<Record<ClientName, string>>; defaultClient?: ClientName; timeout?: number };
   stdoutWrite?: (chunk: string) => void;
   stderrWrite?: (chunk: string) => void;
+  getJob?: (jobId: string) => Job;
+  getJobResult?: (jobId: string) => ExecResult;
+  cancelJob?: (jobId: string) => void;
+  listJobs?: (options?: { filter?: JobStatus }) => Job[];
+  cleanupJobs?: (options?: { maxAgeMs?: number }) => void;
+}
+
+function parseMaxAge(value: string): number | null {
+  const match = value.match(/^(\d+(?:\.\d+)?)\s*([hmsd]?)$/i);
+  if (!match) return null;
+  const num = parseFloat(match[1]);
+  if (!Number.isFinite(num) || num < 0) return null;
+  const unit = match[2].toLowerCase();
+  const multipliers: Record<string, number> = {
+    s: 1000,
+    m: 60 * 1000,
+    h: 60 * 60 * 1000,
+    d: 24 * 60 * 60 * 1000,
+    "": 60 * 60 * 1000,
+  };
+  const multiplier = multipliers[unit];
+  if (multiplier === undefined) return null;
+  return num * multiplier;
 }
 
 function printHelp(): void {
@@ -58,13 +89,18 @@ export async function main(
   const resolveConfig = deps.resolveConfig ?? realResolveConfig;
   const stdoutWrite = deps.stdoutWrite ?? ((c: string) => process.stdout.write(c));
   const stderrWrite = deps.stderrWrite ?? ((c: string) => process.stderr.write(c));
+  const getJob = deps.getJob ?? realGetJob;
+  const getJobResult = deps.getJobResult ?? realGetJobResult;
+  const cancelJob = deps.cancelJob ?? realCancelJob;
+  const listJobs = deps.listJobs ?? realListJobs;
+  const cleanupJobs = deps.cleanupJobs ?? realCleanupJobs;
 
   const rawArgs = argv.slice(2);
   const parseArgs =
     rawArgs[0]?.includes("cli.ts") ? rawArgs.slice(1) : rawArgs;
 
   const args = minimist(parseArgs, {
-    string: ["client", "prompt", "timeout"],
+    string: ["client", "prompt", "timeout", "max-age"],
     boolean: ["json", "text", "help", "debug", "sync"],
     alias: { h: "help" },
   });
@@ -265,6 +301,227 @@ export async function main(
     }
   }
 
+  if (command === "start") {
+    const client = args.client as ClientName | undefined;
+    const prompt = args.prompt as string | undefined;
+
+    if (!client || !CLIENT_NAMES.includes(client)) {
+      const message = !client
+        ? "--client is required"
+        : `Unknown client: ${client}`;
+      if (jsonMode) {
+        console.error(JSON.stringify({ error: message }, null, 2));
+      } else {
+        console.error(`Error: ${message}`);
+      }
+      return 1;
+    }
+
+    if (!prompt) {
+      const message = "--prompt is required";
+      if (jsonMode) {
+        console.error(JSON.stringify({ error: message }, null, 2));
+      } else {
+        console.error(`Error: ${message}`);
+      }
+      return 1;
+    }
+
+    const config = resolveConfig();
+    const parsedTimeout =
+      typeof args.timeout === "string" ? Number(args.timeout) : undefined;
+    const timeoutMs =
+      Number.isFinite(parsedTimeout) ? parsedTimeout : config.timeout;
+
+    try {
+      const job = await startJob(client, prompt, {
+        timeoutMs,
+        debug,
+        onDebug: debug ? (info) => stderrWrite(JSON.stringify(info) + "\n") : undefined,
+      });
+      if (jsonMode) {
+        console.log(JSON.stringify({ jobId: job.id, client: job.client, status: job.status }, null, 2));
+      } else {
+        console.log(`Job ${job.id} started (${job.client}): ${job.status}`);
+      }
+      return 0;
+    } catch (err) {
+      const message = err instanceof Error ? err.message : String(err);
+      if (jsonMode) {
+        console.error(JSON.stringify({ error: message }, null, 2));
+      } else {
+        console.error(message);
+      }
+      return 1;
+    }
+  }
+
+  if (command === "status") {
+    const jobId = args._[1];
+    if (!jobId) {
+      const message = "job-id is required";
+      if (jsonMode) {
+        console.error(JSON.stringify({ error: message }, null, 2));
+      } else {
+        console.error(`Error: ${message}`);
+      }
+      return 1;
+    }
+
+    try {
+      const job = getJob(jobId);
+      if (jsonMode) {
+        console.log(JSON.stringify(job, null, 2));
+      } else {
+        console.log(`Job ${jobId}: ${job.status}`);
+      }
+      return 0;
+    } catch (err) {
+      const message = err instanceof Error ? err.message : String(err);
+      if (jsonMode) {
+        console.error(JSON.stringify({ error: message }, null, 2));
+      } else {
+        console.error(message);
+      }
+      return 1;
+    }
+  }
+
+  if (command === "results") {
+    const jobId = args._[1];
+    if (!jobId) {
+      const message = "job-id is required";
+      if (jsonMode) {
+        console.error(JSON.stringify({ error: message }, null, 2));
+      } else {
+        console.error(`Error: ${message}`);
+      }
+      return 1;
+    }
+
+    try {
+      const result = getJobResult(jobId);
+      if (jsonMode) {
+        console.log(JSON.stringify(result, null, 2));
+      } else {
+        if (result.stdout) stdoutWrite(result.stdout);
+        if (result.stderr) stderrWrite(result.stderr);
+      }
+      return 0;
+    } catch (err) {
+      const message = err instanceof Error ? err.message : String(err);
+      if (jsonMode) {
+        console.error(JSON.stringify({ error: message }, null, 2));
+      } else {
+        console.error(message);
+      }
+      return 1;
+    }
+  }
+
+  if (command === "cancel") {
+    const jobId = args._[1];
+    if (!jobId) {
+      const message = "job-id is required";
+      if (jsonMode) {
+        console.error(JSON.stringify({ error: message }, null, 2));
+      } else {
+        console.error(`Error: ${message}`);
+      }
+      return 1;
+    }
+
+    try {
+      const job = getJob(jobId);
+      if (job.status !== "running") {
+        const message = `Job is not running (status: ${job.status})`;
+        if (jsonMode) {
+          console.error(JSON.stringify({ error: message }, null, 2));
+        } else {
+          console.error(`Error: ${message}`);
+        }
+        return 1;
+      }
+      cancelJob(jobId);
+      if (jsonMode) {
+        console.log(JSON.stringify({ jobId, cancelled: true }, null, 2));
+      } else {
+        console.log(`Job ${jobId} cancelled`);
+      }
+      return 0;
+    } catch (err) {
+      const message = err instanceof Error ? err.message : String(err);
+      if (jsonMode) {
+        console.error(JSON.stringify({ error: message }, null, 2));
+      } else {
+        console.error(message);
+      }
+      return 1;
+    }
+  }
+
+  if (command === "list-jobs") {
+    try {
+      const filter = args.status as JobStatus | undefined;
+      const jobs = listJobs({ filter });
+      if (jsonMode) {
+        console.log(JSON.stringify(jobs, null, 2));
+      } else {
+        for (const job of jobs) {
+          console.log(`${job.id} (${job.client}): ${job.status}`);
+        }
+      }
+      return 0;
+    } catch (err) {
+      const message = err instanceof Error ? err.message : String(err);
+      if (jsonMode) {
+        console.error(JSON.stringify({ error: message }, null, 2));
+      } else {
+        console.error(message);
+      }
+      return 1;
+    }
+  }
+
+  if (command === "cleanup-jobs") {
+    const maxAgeRaw = args["max-age"] as string | undefined;
+    let maxAgeMs: number | undefined;
+    if (maxAgeRaw !== undefined) {
+      const parsed = parseMaxAge(maxAgeRaw);
+      if (parsed === null) {
+        const message = "Invalid --max-age format. Use: <number>[h|m|s|d], e.g. 24h";
+        if (jsonMode) {
+          console.error(JSON.stringify({ error: message }, null, 2));
+        } else {
+          console.error(`Error: ${message}`);
+        }
+        return 1;
+      }
+      maxAgeMs = parsed;
+    }
+
+    try {
+      const jobsBefore = listJobs();
+      cleanupJobs({ maxAgeMs });
+      const jobsAfter = listJobs();
+      const count = jobsBefore.length - jobsAfter.length;
+      if (jsonMode) {
+        console.log(JSON.stringify({ count }, null, 2));
+      } else {
+        console.log(`Cleaned ${count} jobs`);
+      }
+      return 0;
+    } catch (err) {
+      const message = err instanceof Error ? err.message : String(err);
+      if (jsonMode) {
+        console.error(JSON.stringify({ error: message }, null, 2));
+      } else {
+        console.error(message);
+      }
+      return 1;
+    }
+  }
+
   const message = `Unknown command: ${command}`;
   if (jsonMode) {
     console.error(JSON.stringify({ error: message }, null, 2));
diff --git a/tools/ai-cli-dispatch/tests/cli.test.ts b/tools/ai-cli-dispatch/tests/cli.test.ts
index 4c9ec39..69e2286 100644
--- a/tools/ai-cli-dispatch/tests/cli.test.ts
+++ b/tools/ai-cli-dispatch/tests/cli.test.ts
@@ -888,4 +888,544 @@ describe("main", () => {
       out.restore();
     }
   });
+
+  // Job lifecycle subcommands (S-302)
+
+  it("start starts job and returns job ID JSON", async () => {
+    const out = captureOutput();
+    try {
+      const started: { client: ClientName; prompt: string; options?: any }[] = [];
+      const code = await main(
+        ["node", "cli.ts", "start", "--client", "codex", "--prompt", "hello"],
+        {
+          detectClients: () => mockClients,
+          startJob: async (client, prompt, options) => {
+            started.push({ client, prompt, options });
+            return { id: "job-start-1", client, prompt, status: "running", startedAt: new Date().toISOString() };
+          },
+        }
+      );
+      assert.strictEqual(code, 0);
+      assert.strictEqual(started.length, 1);
+      assert.strictEqual(started[0].client, "codex");
+      assert.strictEqual(started[0].prompt, "hello");
+      const parsed = JSON.parse(out.logs[0]);
+      assert.strictEqual(parsed.jobId, "job-start-1");
+      assert.strictEqual(parsed.client, "codex");
+      assert.strictEqual(parsed.status, "running");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("start returns 1 when client is missing", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "start", "--prompt", "hello"], {
+        detectClients: () => mockClients,
+      });
+      assert.strictEqual(code, 1);
+      const parsed = JSON.parse(out.errors[0]);
+      assert.ok(parsed.error.includes("client"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("start returns 1 when prompt is missing", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "start", "--client", "codex"], {
+        detectClients: () => mockClients,
+      });
+      assert.strictEqual(code, 1);
+      const parsed = JSON.parse(out.errors[0]);
+      assert.ok(parsed.error.includes("prompt"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("status <job-id> returns running job JSON", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "status", "job-123"],
+        {
+          detectClients: () => mockClients,
+          getJob: (jobId) => ({
+            id: jobId,
+            client: "codex",
+            prompt: "hello",
+            status: "running",
+            startedAt: "2024-01-01T00:00:00Z",
+          } as any),
+        }
+      );
+      assert.strictEqual(code, 0);
+      const parsed = JSON.parse(out.logs[0]);
+      assert.strictEqual(parsed.id, "job-123");
+      assert.strictEqual(parsed.status, "running");
+      assert.strictEqual(parsed.client, "codex");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("status <job-id> returns completed job JSON", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "status", "job-456"],
+        {
+          detectClients: () => mockClients,
+          getJob: (jobId) => ({
+            id: jobId,
+            client: "claude",
+            prompt: "write tests",
+            status: "completed",
+            startedAt: "2024-01-01T00:00:00Z",
+            completedAt: "2024-01-01T00:01:00Z",
+            result: { stdout: "ok", stderr: "", exitCode: 0, client: "claude", durationMs: 100 },
+          } as any),
+        }
+      );
+      assert.strictEqual(code, 0);
+      const parsed = JSON.parse(out.logs[0]);
+      assert.strictEqual(parsed.status, "completed");
+      assert.strictEqual(parsed.result.exitCode, 0);
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("status returns 1 and prints error JSON for nonexistent job", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "status", "missing-job"],
+        {
+          detectClients: () => mockClients,
+          getJob: () => {
+            throw new Error('Job "missing-job" not found.');
+          },
+        }
+      );
+      assert.strictEqual(code, 1);
+      const parsed = JSON.parse(out.errors[0]);
+      assert.ok(parsed.error.includes("not found"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("status returns 1 when job-id is missing", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "status"], {
+        detectClients: () => mockClients,
+      });
+      assert.strictEqual(code, 1);
+      const parsed = JSON.parse(out.errors[0]);
+      assert.ok(parsed.error.includes("job-id"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("status prints text output with --text", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "status", "job-123", "--text"],
+        {
+          detectClients: () => mockClients,
+          getJob: (jobId) => ({
+            id: jobId,
+            client: "codex",
+            prompt: "hello",
+            status: "running",
+            startedAt: "2024-01-01T00:00:00Z",
+          } as any),
+        }
+      );
+      assert.strictEqual(code, 0);
+      assert.ok(out.logs[0].includes("running"));
+      assert.ok(out.logs[0].includes("job-123"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("results <job-id> returns ExecResult JSON for completed job", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "results", "job-789"],
+        {
+          detectClients: () => mockClients,
+          getJobResult: () => ({
+            stdout: "output",
+            stderr: "",
+            exitCode: 0,
+            client: "codex",
+            durationMs: 42,
+          }),
+        }
+      );
+      assert.strictEqual(code, 0);
+      const parsed = JSON.parse(out.logs[0]);
+      assert.strictEqual(parsed.stdout, "output");
+      assert.strictEqual(parsed.exitCode, 0);
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("results returns 1 and prints error JSON for still-running job", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "results", "job-running"],
+        {
+          detectClients: () => mockClients,
+          getJobResult: () => {
+            throw new Error('Job "job-running" result is not available (status: running).');
+          },
+        }
+      );
+      assert.strictEqual(code, 1);
+      const parsed = JSON.parse(out.errors[0]);
+      assert.ok(parsed.error.includes("not available"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("results returns 1 and prints error JSON for nonexistent job", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "results", "missing-job"],
+        {
+          detectClients: () => mockClients,
+          getJobResult: () => {
+            throw new Error('Job "missing-job" not found.');
+          },
+        }
+      );
+      assert.strictEqual(code, 1);
+      const parsed = JSON.parse(out.errors[0]);
+      assert.ok(parsed.error.includes("not found"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("results returns 1 when job-id is missing", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "results"], {
+        detectClients: () => mockClients,
+      });
+      assert.strictEqual(code, 1);
+      const parsed = JSON.parse(out.errors[0]);
+      assert.ok(parsed.error.includes("job-id"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("results prints text output with --text", async () => {
+    const out = captureOutput();
+    const stdoutChunks: string[] = [];
+    try {
+      const code = await main(
+        ["node", "cli.ts", "results", "job-789", "--text"],
+        {
+          detectClients: () => mockClients,
+          getJobResult: () => ({
+            stdout: "hello-out",
+            stderr: "hello-err",
+            exitCode: 0,
+            client: "codex",
+            durationMs: 42,
+          }),
+          stdoutWrite: (chunk) => stdoutChunks.push(chunk),
+        }
+      );
+      assert.strictEqual(code, 0);
+      assert.strictEqual(stdoutChunks.join(""), "hello-out");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("cancel <job-id> returns cancelled confirmation for running job", async () => {
+    const out = captureOutput();
+    try {
+      let cancelledJobId: string | undefined;
+      const code = await main(
+        ["node", "cli.ts", "cancel", "job-abc"],
+        {
+          detectClients: () => mockClients,
+          getJob: (jobId) => ({
+            id: jobId,
+            client: "codex",
+            prompt: "hello",
+            status: "running",
+            startedAt: "2024-01-01T00:00:00Z",
+          } as any),
+          cancelJob: (jobId) => {
+            cancelledJobId = jobId;
+          },
+        }
+      );
+      assert.strictEqual(code, 0);
+      assert.strictEqual(cancelledJobId, "job-abc");
+      const parsed = JSON.parse(out.logs[0]);
+      assert.strictEqual(parsed.jobId, "job-abc");
+      assert.strictEqual(parsed.cancelled, true);
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("cancel returns 1 and prints error JSON for completed job", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "cancel", "job-done"],
+        {
+          detectClients: () => mockClients,
+          getJob: (jobId) => ({
+            id: jobId,
+            client: "codex",
+            prompt: "hello",
+            status: "completed",
+            startedAt: "2024-01-01T00:00:00Z",
+            completedAt: "2024-01-01T00:01:00Z",
+          } as any),
+        }
+      );
+      assert.strictEqual(code, 1);
+      const parsed = JSON.parse(out.errors[0]);
+      assert.ok(parsed.error.includes("running"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("cancel returns 1 and prints error JSON for nonexistent job", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "cancel", "missing-job"],
+        {
+          detectClients: () => mockClients,
+          getJob: () => {
+            throw new Error('Job "missing-job" not found.');
+          },
+        }
+      );
+      assert.strictEqual(code, 1);
+      const parsed = JSON.parse(out.errors[0]);
+      assert.ok(parsed.error.includes("not found"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("cancel returns 1 when job-id is missing", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "cancel"], {
+        detectClients: () => mockClients,
+      });
+      assert.strictEqual(code, 1);
+      const parsed = JSON.parse(out.errors[0]);
+      assert.ok(parsed.error.includes("job-id"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("cancel prints text output with --text", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "cancel", "job-abc", "--text"],
+        {
+          detectClients: () => mockClients,
+          getJob: (jobId) => ({
+            id: jobId,
+            client: "codex",
+            prompt: "hello",
+            status: "running",
+            startedAt: "2024-01-01T00:00:00Z",
+          } as any),
+          cancelJob: () => {},
+        }
+      );
+      assert.strictEqual(code, 0);
+      assert.ok(out.logs[0].includes("cancelled"));
+      assert.ok(out.logs[0].includes("job-abc"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("list-jobs returns array of all jobs", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "list-jobs"],
+        {
+          detectClients: () => mockClients,
+          listJobs: () => [
+            { id: "job-1", client: "codex", prompt: "p1", status: "running", startedAt: "2024-01-01T00:00:00Z" },
+            { id: "job-2", client: "claude", prompt: "p2", status: "completed", startedAt: "2024-01-01T00:01:00Z" },
+          ] as any[],
+        }
+      );
+      assert.strictEqual(code, 0);
+      const parsed = JSON.parse(out.logs[0]);
+      assert.strictEqual(parsed.length, 2);
+      assert.strictEqual(parsed[0].id, "job-1");
+      assert.strictEqual(parsed[1].id, "job-2");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("list-jobs filters by --status", async () => {
+    const out = captureOutput();
+    try {
+      let receivedFilter: string | undefined;
+      const code = await main(
+        ["node", "cli.ts", "list-jobs", "--status", "running"],
+        {
+          detectClients: () => mockClients,
+          listJobs: (options) => {
+            receivedFilter = options?.filter;
+            return [
+              { id: "job-1", client: "codex", prompt: "p1", status: "running", startedAt: "2024-01-01T00:00:00Z" },
+            ] as any[];
+          },
+        }
+      );
+      assert.strictEqual(code, 0);
+      assert.strictEqual(receivedFilter, "running");
+      const parsed = JSON.parse(out.logs[0]);
+      assert.strictEqual(parsed.length, 1);
+      assert.strictEqual(parsed[0].status, "running");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("list-jobs prints text output with --text", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "list-jobs", "--text"],
+        {
+          detectClients: () => mockClients,
+          listJobs: () => [
+            { id: "job-1", client: "codex", prompt: "p1", status: "running", startedAt: "2024-01-01T00:00:00Z" },
+          ] as any[],
+        }
+      );
+      assert.strictEqual(code, 0);
+      assert.ok(out.logs[0].includes("job-1"));
+      assert.ok(out.logs[0].includes("codex"));
+      assert.ok(out.logs[0].includes("running"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("cleanup-jobs returns count of cleaned jobs", async () => {
+    const out = captureOutput();
+    try {
+      let callCount = 0;
+      const jobs = [
+        { id: "job-1", client: "codex", prompt: "p1", status: "completed", startedAt: "2024-01-01T00:00:00Z" },
+        { id: "job-2", client: "claude", prompt: "p2", status: "completed", startedAt: "2024-01-01T00:01:00Z" },
+      ];
+      const code = await main(
+        ["node", "cli.ts", "cleanup-jobs"],
+        {
+          detectClients: () => mockClients,
+          listJobs: () => {
+            callCount++;
+            return callCount === 1 ? jobs : [];
+          },
+          cleanupJobs: () => {},
+        }
+      );
+      assert.strictEqual(code, 0);
+      const parsed = JSON.parse(out.logs[0]);
+      assert.strictEqual(parsed.count, 2);
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("cleanup-jobs with --max-age parses hours", async () => {
+    const out = captureOutput();
+    try {
+      let receivedMaxAgeMs: number | undefined;
+      const code = await main(
+        ["node", "cli.ts", "cleanup-jobs", "--max-age", "12h"],
+        {
+          detectClients: () => mockClients,
+          listJobs: () => [],
+          cleanupJobs: (options) => {
+            receivedMaxAgeMs = options?.maxAgeMs;
+          },
+        }
+      );
+      assert.strictEqual(code, 0);
+      assert.strictEqual(receivedMaxAgeMs, 12 * 60 * 60 * 1000);
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("cleanup-jobs returns 1 for invalid --max-age format", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "cleanup-jobs", "--max-age", "abc"],
+        {
+          detectClients: () => mockClients,
+        }
+      );
+      assert.strictEqual(code, 1);
+      const parsed = JSON.parse(out.errors[0]);
+      assert.ok(parsed.error.includes("max-age"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("cleanup-jobs prints text output with --text", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "cleanup-jobs", "--text"],
+        {
+          detectClients: () => mockClients,
+          listJobs: () => [],
+          cleanupJobs: () => {},
+        }
+      );
+      assert.strictEqual(code, 0);
+      assert.ok(out.logs[0].includes("Cleaned"));
+      assert.ok(out.logs[0].includes("0"));
+    } finally {
+      out.restore();
+    }
+  });
 });