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+# Managed Local Embeddings Release Smoke Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use
+> superpowers:subagent-driven-development (recommended) or
+> superpowers:executing-plans to implement this plan task-by-task. Steps use
+> checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Add an opt-in release smoke that proves the public `@kaelio/ktx`
+package can install `local-embeddings`, start the managed daemon, compute a real
+local embedding, and persist the managed embedding marker through setup.
+
+**Architecture:** Keep the default `artifacts:verify` path lightweight. Add a
+separate Node smoke script with an explicit opt-in gate, source-level tests, and
+a package script that a release job can run only when large Python and model
+downloads are acceptable.
+
+**Tech Stack:** Node 22 ESM scripts, `node:test`, pnpm, uv, KTX managed Python
+runtime assets, FastAPI embedding endpoint, sentence-transformers.
+
+---
+
+## Existing status
+
+This plan is based on
+`docs/superpowers/specs/2026-05-11-npm-managed-python-runtime-design.md`.
+
+The following plans are based on that spec and are already implemented in this
+worktree:
+
+- `docs/superpowers/plans/2026-05-11-bundled-python-runtime-wheel.md`
+- `docs/superpowers/plans/2026-05-11-managed-python-runtime-installer.md`
+- `docs/superpowers/plans/2026-05-11-managed-python-runtime-command-integration.md`
+- `docs/superpowers/plans/2026-05-11-managed-python-runtime-daemon-lifecycle.md`
+- `docs/superpowers/plans/2026-05-11-managed-local-embeddings-runtime.md`
+- `docs/superpowers/plans/2026-05-11-public-kaelio-ktx-npm-package.md`
+- `docs/superpowers/plans/2026-05-11-managed-python-runtime-release-smoke.md`
+
+Implementation evidence found before writing this plan includes:
+
+- `scripts/build-python-runtime-wheel.mjs` and matching tests.
+- `packages/cli/src/managed-python-runtime.ts`, `runtime.ts`, and
+  `commands/runtime-commands.ts`.
+- `packages/cli/src/managed-python-command.ts` and `ktx sl query` runtime
+  install policy flags.
+- `packages/cli/src/managed-python-daemon.ts` and `ktx runtime start` /
+  `ktx runtime stop`.
+- `packages/cli/src/managed-local-embeddings.ts`,
+  `packages/context/src/llm/local-config.ts`, and setup embedding wiring.
+- `scripts/build-public-npm-package.mjs`, `release-policy.json` listing
+  `@kaelio/ktx`, and public-package smoke command construction.
+- `scripts/package-artifacts.mjs` installed CLI smoke that isolates
+  `KTX_RUNTIME_ROOT`, lazily installs the core runtime, runs `ktx sl query`,
+  checks runtime status and doctor output, and starts, reuses, and stops the
+  core daemon.
+
+The remaining spec gap is the release-check item that permits local embeddings
+coverage in a separate job or opt-in check. The default release artifact smoke
+must not download `sentence-transformers`, `torch`, or the
+`all-MiniLM-L6-v2` model.
+
+## File structure
+
+- Create `scripts/local-embeddings-runtime-smoke.mjs`: an opt-in smoke script
+  that consumes the built public npm tarball, installs it in a temporary pnpm
+  project, isolates all runtime and model caches, installs the
+  `local-embeddings` feature, starts the managed daemon, computes one real
+  embedding, runs setup with local embeddings, verifies the managed config
+  marker, and stops the daemon.
+- Create `scripts/local-embeddings-runtime-smoke.test.mjs`: fast source-level
+  tests for opt-in gating, public tarball selection, cache isolation, command
+  construction, daemon URL parsing, embedding response validation, and package
+  script registration.
+- Modify `package.json`: add `release:local-embeddings-smoke` without adding
+  it to default `check`, `test`, `artifacts:verify`, or release readiness.
+
+### Task 1: Add failing local embeddings smoke tests
+
+**Files:**
+
+- Create: `scripts/local-embeddings-runtime-smoke.test.mjs`
+- Test: `scripts/local-embeddings-runtime-smoke.test.mjs`
+
+- [ ] **Step 1: Write the failing test file**
+
+Create `scripts/local-embeddings-runtime-smoke.test.mjs` with this content:
+
+```javascript
+import assert from 'node:assert/strict';
+import { readFile } from 'node:fs/promises';
+import { describe, it } from 'node:test';
+
+import {
+  buildLocalEmbeddingsSmokeEnv,
+  localEmbeddingsSmokeCommands,
+  localEmbeddingsSmokeOptIn,
+  parseDaemonBaseUrl,
+  publicKtxTarballName,
+  validateEmbeddingResponse,
+} from './local-embeddings-runtime-smoke.mjs';
+
+describe('localEmbeddingsSmokeOptIn', () => {
+  it('skips unless the smoke is explicitly enabled', () => {
+    assert.deepEqual(localEmbeddingsSmokeOptIn({}, []), {
+      run: false,
+      message: 'Set KTX_RUN_LOCAL_EMBEDDINGS_SMOKE=1 or pass --force to run the local embeddings smoke.',
+    });
+  });
+
+  it('runs when the environment opt-in is set', () => {
+    assert.deepEqual(localEmbeddingsSmokeOptIn({ KTX_RUN_LOCAL_EMBEDDINGS_SMOKE: '1' }, []), {
+      run: true,
+    });
+  });
+
+  it('runs when --force is present', () => {
+    assert.deepEqual(localEmbeddingsSmokeOptIn({}, ['--force']), {
+      run: true,
+    });
+  });
+});
+
+describe('publicKtxTarballName', () => {
+  it('selects the public @kaelio/ktx tarball name', () => {
+    assert.equal(
+      publicKtxTarballName(['kaelio-ktx-0.0.0-private.tgz', 'ignore-me.tgz']),
+      'kaelio-ktx-0.0.0-private.tgz',
+    );
+  });
+
+  it('fails when the public package tarball is missing', () => {
+    assert.throws(
+      () => publicKtxTarballName(['ktx-cli-0.0.0-private.tgz']),
+      /Expected exactly one @kaelio\/ktx tarball/,
+    );
+  });
+
+  it('fails when multiple public package tarballs are present', () => {
+    assert.throws(
+      () => publicKtxTarballName(['kaelio-ktx-0.1.0.tgz', 'kaelio-ktx-0.2.0.tgz']),
+      /Expected exactly one @kaelio\/ktx tarball/,
+    );
+  });
+});
+
+describe('buildLocalEmbeddingsSmokeEnv', () => {
+  it('isolates the runtime root and model caches inside the smoke root', () => {
+    const env = buildLocalEmbeddingsSmokeEnv('/tmp/ktx-local-embedding-smoke', {
+      PATH: '/usr/bin',
+    });
+
+    assert.equal(env.PATH, '/usr/bin');
+    assert.equal(env.KTX_RUN_LOCAL_EMBEDDINGS_SMOKE, '1');
+    assert.equal(env.KTX_RUNTIME_ROOT, '/tmp/ktx-local-embedding-smoke/managed-runtime');
+    assert.equal(env.HF_HOME, '/tmp/ktx-local-embedding-smoke/hf-home');
+    assert.equal(env.TRANSFORMERS_CACHE, '/tmp/ktx-local-embedding-smoke/transformers-cache');
+    assert.equal(env.SENTENCE_TRANSFORMERS_HOME, '/tmp/ktx-local-embedding-smoke/sentence-transformers-home');
+    assert.equal(env.TORCH_HOME, '/tmp/ktx-local-embedding-smoke/torch-home');
+  });
+});
+
+describe('localEmbeddingsSmokeCommands', () => {
+  it('describes the installed-package commands needed for the smoke', () => {
+    const commands = localEmbeddingsSmokeCommands({
+      projectDir: '/tmp/ktx-local-embedding-smoke/project',
+    });
+
+    assert.deepEqual(commands.map((command) => command.label), [
+      'ktx public package version',
+      'ktx runtime status missing',
+      'ktx runtime install local embeddings',
+      'ktx runtime status local embeddings ready',
+      'ktx runtime start local embeddings',
+      'ktx setup local embeddings',
+      'ktx runtime stop local embeddings',
+    ]);
+    assert.deepEqual(commands[2], {
+      label: 'ktx runtime install local embeddings',
+      command: 'pnpm',
+      args: ['exec', 'ktx', 'runtime', 'install', '--feature', 'local-embeddings', '--yes'],
+      timeoutMs: 1_200_000,
+    });
+    assert.deepEqual(commands[4], {
+      label: 'ktx runtime start local embeddings',
+      command: 'pnpm',
+      args: ['exec', 'ktx', 'runtime', 'start', '--feature', 'local-embeddings'],
+      timeoutMs: 300_000,
+    });
+    assert.deepEqual(commands[5].args, [
+      'exec',
+      'ktx',
+      'setup',
+      '--project-dir',
+      '/tmp/ktx-local-embedding-smoke/project',
+      '--new',
+      '--no-input',
+      '--yes',
+      '--skip-llm',
+      '--embedding-backend',
+      'sentence-transformers',
+      '--skip-databases',
+      '--skip-sources',
+      '--skip-agents',
+    ]);
+  });
+});
+
+describe('parseDaemonBaseUrl', () => {
+  it('extracts the daemon URL from runtime start output', () => {
+    assert.equal(
+      parseDaemonBaseUrl('Started KTX Python daemon\nurl: http://127.0.0.1:61234\nfeatures: local-embeddings\n'),
+      'http://127.0.0.1:61234',
+    );
+  });
+
+  it('rejects output without a daemon URL', () => {
+    assert.throws(() => parseDaemonBaseUrl('Started KTX Python daemon\n'), /Daemon URL was not printed/);
+  });
+});
+
+describe('validateEmbeddingResponse', () => {
+  it('accepts a finite embedding vector with the expected dimensions', () => {
+    validateEmbeddingResponse({ embedding: [0.1, -0.2, 0.3] }, 3);
+  });
+
+  it('rejects a vector with the wrong dimensions', () => {
+    assert.throws(
+      () => validateEmbeddingResponse({ embedding: [0.1, 0.2] }, 3),
+      /Expected embedding dimension 3, got 2/,
+    );
+  });
+
+  it('rejects non-finite embedding values', () => {
+    assert.throws(
+      () => validateEmbeddingResponse({ embedding: [0.1, Number.NaN, 0.3] }, 3),
+      /Embedding value at index 1 is not a finite number/,
+    );
+  });
+});
+
+describe('package script', () => {
+  it('registers the opt-in local embeddings smoke command', async () => {
+    const packageJson = JSON.parse(await readFile(new URL('../package.json', import.meta.url), 'utf8'));
+
+    assert.equal(
+      packageJson.scripts['release:local-embeddings-smoke'],
+      'node scripts/local-embeddings-runtime-smoke.mjs --require-opt-in',
+    );
+  });
+});
+```
+
+- [ ] **Step 2: Run the failing test**
+
+Run:
+
+```bash
+node --test scripts/local-embeddings-runtime-smoke.test.mjs
+```
+
+Expected: FAIL with an import error for
+`./local-embeddings-runtime-smoke.mjs`.
+
+- [ ] **Step 3: Commit the failing tests**
+
+Run:
+
+```bash
+git add scripts/local-embeddings-runtime-smoke.test.mjs
+git commit -m "test: specify local embeddings release smoke"
+```
+
+### Task 2: Implement the opt-in smoke script
+
+**Files:**
+
+- Create: `scripts/local-embeddings-runtime-smoke.mjs`
+- Test: `scripts/local-embeddings-runtime-smoke.test.mjs`
+
+- [ ] **Step 1: Create the smoke script**
+
+Create `scripts/local-embeddings-runtime-smoke.mjs` with this content:
+
+```javascript
+import { execFile } from 'node:child_process';
+import { mkdir, mkdtemp, readFile, readdir, rm, writeFile } from 'node:fs/promises';
+import { tmpdir } from 'node:os';
+import { dirname, join, resolve } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { promisify } from 'node:util';
+
+const execFileAsync = promisify(execFile);
+const SCRIPT_DIR = dirname(fileURLToPath(import.meta.url));
+const DEFAULT_ROOT_DIR = resolve(SCRIPT_DIR, '..');
+const PUBLIC_NPM_ARTIFACT_DIR = join('dist', 'artifacts', 'npm');
+const OPT_IN_MESSAGE =
+  'Set KTX_RUN_LOCAL_EMBEDDINGS_SMOKE=1 or pass --force to run the local embeddings smoke.';
+
+export function localEmbeddingsSmokeOptIn(env = process.env, args = process.argv.slice(2)) {
+  if (env.KTX_RUN_LOCAL_EMBEDDINGS_SMOKE === '1' || args.includes('--force')) {
+    return { run: true };
+  }
+  return { run: false, message: OPT_IN_MESSAGE };
+}
+
+export function publicKtxTarballName(files) {
+  const matches = files.filter((file) => /^kaelio-ktx-.+\.tgz$/.test(file)).sort();
+  if (matches.length !== 1) {
+    throw new Error(
+      `Expected exactly one @kaelio/ktx tarball in ${PUBLIC_NPM_ARTIFACT_DIR}, found ${matches.length}: ${
+        matches.join(', ') || 'none'
+      }. Run pnpm run artifacts:build first.`,
+    );
+  }
+  return matches[0];
+}
+
+export async function selectPublicKtxTarball(rootDir = DEFAULT_ROOT_DIR) {
+  const npmArtifactDir = join(rootDir, PUBLIC_NPM_ARTIFACT_DIR);
+  const files = await readdir(npmArtifactDir);
+  return join(npmArtifactDir, publicKtxTarballName(files));
+}
+
+export function buildLocalEmbeddingsSmokeEnv(root, baseEnv = process.env) {
+  return {
+    ...baseEnv,
+    KTX_RUN_LOCAL_EMBEDDINGS_SMOKE: '1',
+    KTX_RUNTIME_ROOT: join(root, 'managed-runtime'),
+    HF_HOME: join(root, 'hf-home'),
+    TRANSFORMERS_CACHE: join(root, 'transformers-cache'),
+    SENTENCE_TRANSFORMERS_HOME: join(root, 'sentence-transformers-home'),
+    TORCH_HOME: join(root, 'torch-home'),
+  };
+}
+
+export function localEmbeddingsSmokeCommands(input) {
+  return [
+    {
+      label: 'ktx public package version',
+      command: 'pnpm',
+      args: ['exec', 'ktx', '--version'],
+      timeoutMs: 60_000,
+    },
+    {
+      label: 'ktx runtime status missing',
+      command: 'pnpm',
+      args: ['exec', 'ktx', 'runtime', 'status', '--json'],
+      timeoutMs: 60_000,
+    },
+    {
+      label: 'ktx runtime install local embeddings',
+      command: 'pnpm',
+      args: ['exec', 'ktx', 'runtime', 'install', '--feature', 'local-embeddings', '--yes'],
+      timeoutMs: 1_200_000,
+    },
+    {
+      label: 'ktx runtime status local embeddings ready',
+      command: 'pnpm',
+      args: ['exec', 'ktx', 'runtime', 'status', '--json'],
+      timeoutMs: 60_000,
+    },
+    {
+      label: 'ktx runtime start local embeddings',
+      command: 'pnpm',
+      args: ['exec', 'ktx', 'runtime', 'start', '--feature', 'local-embeddings'],
+      timeoutMs: 300_000,
+    },
+    {
+      label: 'ktx setup local embeddings',
+      command: 'pnpm',
+      args: [
+        'exec',
+        'ktx',
+        'setup',
+        '--project-dir',
+        input.projectDir,
+        '--new',
+        '--no-input',
+        '--yes',
+        '--skip-llm',
+        '--embedding-backend',
+        'sentence-transformers',
+        '--skip-databases',
+        '--skip-sources',
+        '--skip-agents',
+      ],
+      timeoutMs: 900_000,
+    },
+    {
+      label: 'ktx runtime stop local embeddings',
+      command: 'pnpm',
+      args: ['exec', 'ktx', 'runtime', 'stop'],
+      timeoutMs: 60_000,
+    },
+  ];
+}
+
+export function parseDaemonBaseUrl(stdout) {
+  const match = stdout.match(/^url: (http:\/\/127\.0\.0\.1:\d+)$/m);
+  if (!match) {
+    throw new Error(`Daemon URL was not printed by runtime start:\n${stdout}`);
+  }
+  return match[1];
+}
+
+export function validateEmbeddingResponse(raw, expectedDimensions) {
+  if (!raw || typeof raw !== 'object' || Array.isArray(raw)) {
+    throw new Error('Embedding response must be a JSON object');
+  }
+  const embedding = raw.embedding;
+  if (!Array.isArray(embedding)) {
+    throw new Error('Embedding response must include an embedding array');
+  }
+  if (embedding.length !== expectedDimensions) {
+    throw new Error(`Expected embedding dimension ${expectedDimensions}, got ${embedding.length}`);
+  }
+  for (const [index, value] of embedding.entries()) {
+    if (typeof value !== 'number' || !Number.isFinite(value)) {
+      throw new Error(`Embedding value at index ${index} is not a finite number`);
+    }
+  }
+}
+
+async function run(command, args, options = {}) {
+  process.stdout.write(`$ ${command} ${args.join(' ')}\n`);
+  try {
+    const result = await execFileAsync(command, args, {
+      cwd: options.cwd,
+      env: { ...process.env, ...options.env },
+      encoding: 'utf8',
+      maxBuffer: 1024 * 1024 * 20,
+      timeout: options.timeoutMs ?? 120_000,
+    });
+    if (result.stdout) {
+      process.stdout.write(result.stdout);
+    }
+    if (result.stderr) {
+      process.stderr.write(result.stderr);
+    }
+    return { code: 0, stdout: result.stdout, stderr: result.stderr };
+  } catch (error) {
+    const stdout = typeof error.stdout === 'string' ? error.stdout : '';
+    const stderr = typeof error.stderr === 'string' ? error.stderr : error.message;
+    if (stdout) {
+      process.stdout.write(stdout);
+    }
+    if (stderr) {
+      process.stderr.write(stderr);
+    }
+    return {
+      code: typeof error.code === 'number' ? error.code : 1,
+      stdout,
+      stderr,
+    };
+  }
+}
+
+function requireSuccess(label, result, options = {}) {
+  if (result.code !== 0) {
+    throw new Error(`${label} failed with code ${result.code}\nstdout:\n${result.stdout}\nstderr:\n${result.stderr}`);
+  }
+  if (options.stderrPattern && !options.stderrPattern.test(result.stderr)) {
+    throw new Error(`${label} stderr did not match ${options.stderrPattern}\nstderr:\n${result.stderr}`);
+  }
+}
+
+function parseJsonStdout(label, result) {
+  requireSuccess(label, result);
+  try {
+    return JSON.parse(result.stdout);
+  } catch (error) {
+    throw new Error(`${label} did not write JSON stdout: ${error.message}\nstdout:\n${result.stdout}`);
+  }
+}
+
+function requireOutput(label, result, pattern) {
+  if (!pattern.test(result.stdout)) {
+    throw new Error(`${label} stdout did not match ${pattern}\nstdout:\n${result.stdout}`);
+  }
+}
+
+async function postJson(baseUrl, path, payload, timeoutMs) {
+  const response = await fetch(new URL(path, baseUrl), {
+    method: 'POST',
+    headers: {
+      accept: 'application/json',
+      'content-type': 'application/json',
+    },
+    body: JSON.stringify(payload),
+    signal: AbortSignal.timeout(timeoutMs),
+  });
+  const text = await response.text();
+  if (!response.ok) {
+    throw new Error(`POST ${path} failed with ${response.status}: ${text}`);
+  }
+  try {
+    return JSON.parse(text);
+  } catch (error) {
+    throw new Error(`POST ${path} returned non-JSON response: ${error.message}\n${text}`);
+  }
+}
+
+async function writeSmokePackage(projectDir, tarballPath) {
+  await mkdir(projectDir, { recursive: true });
+  await writeFile(
+    join(projectDir, 'package.json'),
+    `${JSON.stringify(
+      {
+        name: 'ktx-local-embeddings-runtime-smoke',
+        version: '0.0.0',
+        private: true,
+        type: 'module',
+        dependencies: {
+          '@kaelio/ktx': `file:${tarballPath}`,
+        },
+      },
+      null,
+      2,
+    )}\n`,
+  );
+}
+
+export async function runLocalEmbeddingsRuntimeSmoke(options = {}) {
+  const rootDir = options.rootDir ?? DEFAULT_ROOT_DIR;
+  const tarballPath = options.tarballPath ?? (await selectPublicKtxTarball(rootDir));
+  const root = await mkdtemp(join(tmpdir(), 'ktx-local-embeddings-smoke-'));
+  const keepTemp = options.keepTemp ?? process.env.KTX_KEEP_LOCAL_EMBEDDINGS_SMOKE === '1';
+  const installDir = join(root, 'installed-package');
+  const projectDir = join(root, 'project');
+  const smokeEnv = buildLocalEmbeddingsSmokeEnv(root);
+  const commands = localEmbeddingsSmokeCommands({ projectDir });
+  let daemonStarted = false;
+
+  try {
+    await writeSmokePackage(installDir, tarballPath);
+    requireSuccess(
+      'pnpm install public package',
+      await run('pnpm', ['install', '--ignore-scripts=false'], {
+        cwd: installDir,
+        env: smokeEnv,
+        timeoutMs: 300_000,
+      }),
+    );
+
+    const version = await run(commands[0].command, commands[0].args, {
+      cwd: installDir,
+      env: smokeEnv,
+      timeoutMs: commands[0].timeoutMs,
+    });
+    requireSuccess(commands[0].label, version);
+    requireOutput(commands[0].label, version, /@kaelio\/ktx 0\.0\.0-private/);
+
+    const missingStatus = parseJsonStdout(
+      commands[1].label,
+      await run(commands[1].command, commands[1].args, {
+        cwd: installDir,
+        env: smokeEnv,
+        timeoutMs: commands[1].timeoutMs,
+      }),
+    );
+    if (missingStatus.kind !== 'missing') {
+      throw new Error(`Expected missing runtime before install, got ${JSON.stringify(missingStatus)}`);
+    }
+
+    const install = await run(commands[2].command, commands[2].args, {
+      cwd: installDir,
+      env: smokeEnv,
+      timeoutMs: commands[2].timeoutMs,
+    });
+    requireSuccess(commands[2].label, install);
+    requireOutput(commands[2].label, install, /Installed KTX Python runtime/);
+    requireOutput(commands[2].label, install, /features: core, local-embeddings/);
+
+    const readyStatus = parseJsonStdout(
+      commands[3].label,
+      await run(commands[3].command, commands[3].args, {
+        cwd: installDir,
+        env: smokeEnv,
+        timeoutMs: commands[3].timeoutMs,
+      }),
+    );
+    if (readyStatus.kind !== 'ready') {
+      throw new Error(`Expected ready runtime after install, got ${JSON.stringify(readyStatus)}`);
+    }
+    if (!readyStatus.manifest?.features?.includes('local-embeddings')) {
+      throw new Error(`Runtime manifest did not include local-embeddings: ${JSON.stringify(readyStatus.manifest)}`);
+    }
+
+    const start = await run(commands[4].command, commands[4].args, {
+      cwd: installDir,
+      env: smokeEnv,
+      timeoutMs: commands[4].timeoutMs,
+    });
+    requireSuccess(commands[4].label, start);
+    daemonStarted = true;
+    const baseUrl = parseDaemonBaseUrl(start.stdout);
+
+    const embeddingResponse = await postJson(
+      baseUrl,
+      '/embeddings/compute',
+      { text: 'KTX local embeddings release smoke' },
+      900_000,
+    );
+    validateEmbeddingResponse(embeddingResponse, 384);
+    process.stdout.write('KTX local embeddings daemon computed a 384-dimensional embedding\n');
+
+    const setup = await run(commands[5].command, commands[5].args, {
+      cwd: installDir,
+      env: smokeEnv,
+      timeoutMs: commands[5].timeoutMs,
+    });
+    requireSuccess(commands[5].label, setup);
+    requireOutput(commands[5].label, setup, /Embeddings ready: yes \(all-MiniLM-L6-v2\)/);
+
+    const config = await readFile(join(projectDir, 'ktx.yaml'), 'utf8');
+    if (!config.includes('base_url: managed:local-embeddings')) {
+      throw new Error(`ktx.yaml did not contain managed local embeddings marker:\n${config}`);
+    }
+    process.stdout.write('KTX setup persisted managed local embeddings marker\n');
+
+    const stop = await run(commands[6].command, commands[6].args, {
+      cwd: installDir,
+      env: smokeEnv,
+      timeoutMs: commands[6].timeoutMs,
+    });
+    requireSuccess(commands[6].label, stop);
+    daemonStarted = false;
+    requireOutput(commands[6].label, stop, /Stopped KTX Python daemon/);
+
+    process.stdout.write('KTX local embeddings runtime smoke verified\n');
+  } finally {
+    if (daemonStarted) {
+      await run('pnpm', ['exec', 'ktx', 'runtime', 'stop'], {
+        cwd: installDir,
+        env: smokeEnv,
+        timeoutMs: 60_000,
+      });
+    }
+    if (!keepTemp) {
+      await rm(root, { recursive: true, force: true });
+    } else {
+      process.stdout.write(`Kept local embeddings smoke root: ${root}\n`);
+    }
+  }
+}
+
+async function main() {
+  const args = process.argv.slice(2);
+  const optIn = localEmbeddingsSmokeOptIn(process.env, args);
+  if (!optIn.run) {
+    process.stdout.write(`Skipping KTX local embeddings runtime smoke. ${optIn.message}\n`);
+    if (args.includes('--require-opt-in')) {
+      process.exitCode = 1;
+    }
+    return;
+  }
+
+  await runLocalEmbeddingsRuntimeSmoke();
+}
+
+if (process.argv[1] && fileURLToPath(import.meta.url) === resolve(process.argv[1])) {
+  main().catch((error) => {
+    process.stderr.write(`${error instanceof Error ? error.stack ?? error.message : String(error)}\n`);
+    process.exitCode = 1;
+  });
+}
+```
+
+- [ ] **Step 2: Run the smoke test**
+
+Run:
+
+```bash
+node --test scripts/local-embeddings-runtime-smoke.test.mjs
+```
+
+Expected: FAIL only in the package script test because
+`release:local-embeddings-smoke` is not registered yet.
+
+- [ ] **Step 3: Commit the smoke script**
+
+Run:
+
+```bash
+git add scripts/local-embeddings-runtime-smoke.mjs
+git commit -m "feat: add local embeddings runtime smoke"
+```
+
+### Task 3: Register the opt-in package script
+
+**Files:**
+
+- Modify: `package.json`
+- Test: `scripts/local-embeddings-runtime-smoke.test.mjs`
+
+- [ ] **Step 1: Add the package script**
+
+In `package.json`, add this script immediately after
+`"release:published-smoke"`:
+
+```json
+"release:local-embeddings-smoke": "node scripts/local-embeddings-runtime-smoke.mjs --require-opt-in",
+```
+
+The surrounding `scripts` section must contain this sequence after the edit:
+
+```json
+"release:published-smoke": "node scripts/published-package-smoke.mjs --require-config",
+"release:local-embeddings-smoke": "node scripts/local-embeddings-runtime-smoke.mjs --require-opt-in",
+"release:readiness": "node scripts/release-readiness.mjs",
+```
+
+- [ ] **Step 2: Run the focused test**
+
+Run:
+
+```bash
+node --test scripts/local-embeddings-runtime-smoke.test.mjs
+```
+
+Expected: PASS.
+
+- [ ] **Step 3: Verify the script stays opt-in**
+
+Run:
+
+```bash
+pnpm run release:local-embeddings-smoke
+```
+
+Expected: FAIL with:
+
+```text
+Skipping KTX local embeddings runtime smoke. Set KTX_RUN_LOCAL_EMBEDDINGS_SMOKE=1 or pass --force to run the local embeddings smoke.
+```
+
+The command must exit non-zero because `--require-opt-in` is present. This
+protects local and CI runs from downloading large dependencies by accident.
+
+- [ ] **Step 4: Commit the package script**
+
+Run:
+
+```bash
+git add package.json
+git commit -m "chore: register local embeddings smoke"
+```
+
+### Task 4: Verify the opt-in smoke path
+
+**Files:**
+
+- Verify: `scripts/local-embeddings-runtime-smoke.mjs`
+- Verify: `scripts/local-embeddings-runtime-smoke.test.mjs`
+- Verify: `package.json`
+
+- [ ] **Step 1: Run fast script tests**
+
+Run:
+
+```bash
+node --test scripts/local-embeddings-runtime-smoke.test.mjs scripts/package-artifacts.test.mjs
+```
+
+Expected: PASS. Existing package artifact tests must still prove that the
+default npm artifact smoke does not prepare an external Python environment or
+run local embeddings downloads.
+
+- [ ] **Step 2: Build release artifacts for the smoke**
+
+Run:
+
+```bash
+pnpm run artifacts:build
+```
+
+Expected: PASS and `dist/artifacts/npm/` contains exactly one
+`kaelio-ktx-*.tgz` tarball.
+
+- [ ] **Step 3: Run the opt-in local embeddings smoke**
+
+Run this only in an environment where downloading `sentence-transformers`,
+`torch`, and `all-MiniLM-L6-v2` is acceptable:
+
+```bash
+KTX_RUN_LOCAL_EMBEDDINGS_SMOKE=1 pnpm run release:local-embeddings-smoke
+```
+
+Expected: PASS with output containing:
+
+```text
+KTX local embeddings daemon computed a 384-dimensional embedding
+KTX setup persisted managed local embeddings marker
+KTX local embeddings runtime smoke verified
+```
+
+- [ ] **Step 4: Run release readiness**
+
+Run:
+
+```bash
+pnpm run release:readiness
+```
+
+Expected: PASS. The readiness report must not require
+`release:local-embeddings-smoke`; that smoke remains a separately triggered
+release job.
+
+- [ ] **Step 5: Run pre-commit for changed files when configured**
+
+Run:
+
+```bash
+uv run pre-commit run --files scripts/local-embeddings-runtime-smoke.mjs scripts/local-embeddings-runtime-smoke.test.mjs package.json
+```
+
+Expected: PASS. If pre-commit is unavailable in the environment, record the
+tooling failure and keep the previous verification output.
+
+- [ ] **Step 6: Commit verification fixes if needed**
+
+If verification required edits, run:
+
+```bash
+git add scripts/local-embeddings-runtime-smoke.mjs scripts/local-embeddings-runtime-smoke.test.mjs package.json
+git commit -m "fix: verify local embeddings smoke"
+```
+
+Skip this commit when no files changed after the previous commits.
+
+## Acceptance criteria
+
+- `node --test scripts/local-embeddings-runtime-smoke.test.mjs` passes.
+- `pnpm run release:local-embeddings-smoke` fails fast without the opt-in
+  environment variable and prints the exact opt-in guidance.
+- `KTX_RUN_LOCAL_EMBEDDINGS_SMOKE=1 pnpm run release:local-embeddings-smoke`
+  installs the public `@kaelio/ktx` tarball into a clean project, isolates
+  `KTX_RUNTIME_ROOT` and model caches, installs `local-embeddings`, starts the
+  managed daemon, computes a 384-dimensional embedding through
+  `/embeddings/compute`, runs setup with `--embedding-backend
+  sentence-transformers`, verifies `base_url: managed:local-embeddings` in
+  `ktx.yaml`, and stops the daemon.
+- The default `pnpm run artifacts:verify`, `pnpm run release:readiness`, and
+  `pnpm run check` paths do not run the local embeddings smoke.
+
+## Self-review
+
+- Spec coverage: this plan covers the remaining release-check item for local
+  embeddings in a separate job or opt-in check. Earlier implemented plans cover
+  the bundled wheel, managed runtime installer, `sl query` command integration,
+  daemon lifecycle, managed local embeddings runtime behavior, public npm
+  package assembly, and default core runtime release smoke.
+- Placeholder scan: no steps contain placeholder implementation language.
+- Type consistency: runtime feature names are consistently `core` and
+  `local-embeddings`; the public npm package name is `@kaelio/ktx`; the opt-in
+  environment variable is `KTX_RUN_LOCAL_EMBEDDINGS_SMOKE`; the managed local
+  embedding marker remains `managed:local-embeddings`.