diff --git a/README.md b/README.md
index e48af2c..7cc9b8c 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ if (homeKey === undefined) throw new Error('MIAKAPP_HOME_KEY is required');
 const coordinator = createCoordinator({
   name: 'home-assistant',
   accessTokenProvider: createHomeKeyAccessTokenProvider({
-    exchangeEndpoint: 'https://control.miakapp.com/v1/access-tokens:exchange',
+    exchangeEndpoint: 'https://api.miakapp.com/v1/access-tokens:exchange',
     homeKey,
   }),
 });
diff --git a/packages/cli/README.md b/packages/cli/README.md
index b551e91..114c6ce 100644
--- a/packages/cli/README.md
+++ b/packages/cli/README.md
@@ -40,8 +40,7 @@ build a whole-house application with nothing but this package and Bun:
 Prerequisites: Node.js ≥ 22.9 for the CLI, Bun ≥ 1.2.23 for `bun run build`
 (TypeScript, from `bun install`, only for `typecheck`). The starter accepts
 `--artifact` (a plain relative `.js` path), `--release`, `--home`,
-`--control-plane` and `--context`; it cannot be combined with
-`--kind component`.
+`--control-plane` and `--context`.
 
 It never overwrites anything: every target is checked first, and if any one
 exists the command fails with exit 2 and writes nothing. Without `--starter`,
@@ -89,8 +88,7 @@ coordinator:
 ```
 
 `app` declares only `state_read` and `call`; events, media and reserved
-`miakapp.*` calls are unavailable. Use `miakapp init --kind component` for the
-semantic component ABI instead. Choose exactly one of `app` and `component`.
+`miakapp.*` calls are unavailable.
 
 `requires` is the closed RFC 0002 capability object. Lists are de-duplicated and
 sorted before they are bound into an upload capability, so the value the CLI
@@ -237,7 +235,7 @@ miakapp pair --code "$CODE"               # allowed, but lands in shell history
 
 | Option | Default |
 | --- | --- |
-| `--issuer <https url>` | `https://control.miakapp.com` |
+| `--issuer <https url>` | `https://api.miakapp.com` |
 | `--label <label>` | `miakapp-cli@<host name>`, shown in the owner's key list |
 | `--name <context>` | the paired home ID (`-2`, `-3`… if taken) |
 
@@ -341,6 +339,5 @@ talks to is deployed; publishing it to npm is a deliberate, separate step.
 
 Run `miakapp help` or append `--help` / `-h` to any command, including
 `miakapp pair --help`. Help never prompts for a code or executes the command.
-`miakapp init` defaults to a whole-house app at `dist/app.js`; add
-`--starter app` for the buildable starter, or use `--kind component` for a
-semantic component at `dist/component.js`.
+`miakapp init` writes a whole-house app at `dist/app.js`; add
+`--starter app` for the buildable starter.
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 56ff42d..b9f246b 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@miakapp/cli",
-  "version": "4.0.0-alpha.15",
+  "version": "4.0.0",
   "description": "Agent-first Miakapp command line: check, build, publish, activate and roll back home interfaces",
   "type": "module",
   "engines": {
diff --git a/packages/cli/src/main.ts b/packages/cli/src/main.ts
index 0241946..f902c4e 100644
--- a/packages/cli/src/main.ts
+++ b/packages/cli/src/main.ts
@@ -182,7 +182,7 @@ pair options
 publish options
   --expected-generation <n>   Generation the pointer holds (default: read live)
   --generation <n>            Generation to publish (default: expected + 1)
-  --release <name>            Override app.release or component.release from ${PROJECT_FILE}
+  --release <name>            Override app.release from ${PROJECT_FILE}
 
 activate / rollback options
   --sha256 <digest>           Finalized artifact digest (required)
@@ -203,9 +203,7 @@ agent-pack options
 init options
   --home <homeId>             Home ID (default: from the selected context)
   --control-plane <https url> Control-plane issuer (default: from the context)
-  --kind <app|component>      Interface kind (default: app)
-  --artifact <path>           Built artifact path (default: dist/app.js for app,
-                              dist/component.js for component)
+  --artifact <path>           Built artifact path (default: dist/app.js)
   --release <name>            Initial release name (default: 0.1.0)
   --starter app               Also write a self-contained app to edit: app/main.ts,
                               the app/miakapp.ts bridge, package.json (build and
@@ -239,7 +237,7 @@ export const COMMAND_OPTIONS: Record<string, readonly string[]> = {
   docs: [],
   pair: ['code', 'issuer', 'label', 'name'],
   context: [],
-  init: ['home', 'control-plane', 'artifact', 'release', 'context', 'kind', 'starter'],
+  init: ['home', 'control-plane', 'artifact', 'release', 'context', 'starter'],
   'agent-pack': ['dir'],
   discover: ['flows'],
   check: [],
@@ -625,10 +623,8 @@ function projectTemplate(fields: {
   controlPlane: string;
   artifact: string;
   release: string;
-  kind: 'app' | 'component';
 }): string {
-  if (fields.kind === 'app') {
-    return `schema: ${PROJECT_SCHEMA}
+  return `schema: ${PROJECT_SCHEMA}
 home: ${fields.home}
 control_plane: ${fields.controlPlane}
 
@@ -642,21 +638,6 @@ app:
   requires:
     state_read: []
     call: []
-`;
-  }
-  return `schema: ${PROJECT_SCHEMA}
-home: ${fields.home}
-control_plane: ${fields.controlPlane}
-
-component:
-  artifact: ${fields.artifact}
-  release: ${fields.release}
-  requires:
-    state_read: []
-    event_subscribe: []
-    event_publish: []
-    call: []
-    presentation: []
 `;
 }
 
@@ -672,14 +653,7 @@ async function runInit(host: CliHost, invocation: Invocation): Promise<CommandRe
   if (starter !== undefined && !isStarter(starter)) {
     throw usageError(`--starter must be ${STARTERS.join(' or ')}, received ${starter}`);
   }
-  const kind = invocation.options.get('kind') ?? 'app';
-  if (kind !== 'app' && kind !== 'component') {
-    throw usageError('--kind must be app (whole-house application, default) or component');
-  }
-  if (starter !== undefined && kind !== 'app') {
-    throw usageError('--starter app writes a whole-house application; it cannot be combined with --kind component');
-  }
-  const artifact = invocation.options.get('artifact') ?? (kind === 'app' ? 'dist/app.js' : 'dist/component.js');
+  const artifact = invocation.options.get('artifact') ?? 'dist/app.js';
   if (starter !== undefined) validateStarterArtifact(artifact);
 
   // Every collision is found before anything is written: a refused init leaves
@@ -703,7 +677,6 @@ async function runInit(host: CliHost, invocation: Invocation): Promise<CommandRe
     controlPlane: target.controlPlane,
     artifact,
     release,
-    kind,
   });
   // Parsed before it is written, so init can never emit a file check rejects.
   parseProject(root, source);
@@ -748,7 +721,6 @@ async function runInit(host: CliHost, invocation: Invocation): Promise<CommandRe
     json: {
       project: path,
       schema: PROJECT_SCHEMA,
-      kind,
       home_id: target.home,
       control_plane: target.controlPlane,
       context: target.context ?? null,
diff --git a/packages/cli/src/mcp.ts b/packages/cli/src/mcp.ts
index 9be92cf..55eefa7 100644
--- a/packages/cli/src/mcp.ts
+++ b/packages/cli/src/mcp.ts
@@ -185,7 +185,7 @@ export const TOOLS: readonly ToolDefinition[] = [
         name: 'issuer',
         type: 'string',
         required: false,
-        description: 'Control plane to redeem at. Defaults to https://control.miakapp.com.',
+        description: 'Control plane to redeem at. Defaults to https://api.miakapp.com.',
       },
       {
         name: 'label',
@@ -330,7 +330,7 @@ export const TOOLS: readonly ToolDefinition[] = [
     description:
       'Write miakapp.yaml in the project directory. Refuses to overwrite an existing one, so it '
       + 'is safe to call when unsure. home and control_plane default to the selected or current '
-      + 'context, so after miakapp_pair no identifier needs typing. kind defaults to app: a '
+      + 'context, so after miakapp_pair no identifier needs typing. It declares a '
       + 'whole-house application you draw yourself (any DOM, CSS, framework) bundled as one IIFE. '
       + 'Declares no requirements: grant them one at a time, as the interface earns them. With '
       + 'starter "app" it also writes a self-contained app to edit (app/main.ts, the app/miakapp.ts '
@@ -339,19 +339,12 @@ export const TOOLS: readonly ToolDefinition[] = [
       + 'shows only what the home shares and invents nothing: inventory the house and adapt it '
       + 'before publishing.',
     args: [
-      {
-        name: 'kind',
-        type: 'string',
-        required: false,
-        description: 'app (whole-house application, default) or component (semantic tree).',
-      },
       {
         name: 'starter',
         type: 'string',
         required: false,
         description:
-          'app: also write the buildable app starter. Omit to write miakapp.yaml only. Not '
-          + 'combinable with kind component.',
+          'app: also write the buildable app starter. Omit to write miakapp.yaml only.',
       },
       {
         name: 'home',
@@ -369,7 +362,7 @@ export const TOOLS: readonly ToolDefinition[] = [
         name: 'artifact',
         type: 'string',
         required: false,
-        description: 'Built artifact path. Defaults to dist/app.js (app) or dist/component.js.',
+        description: 'Built artifact path. Defaults to dist/app.js.',
       },
       {
         name: 'release',
@@ -443,7 +436,7 @@ export const TOOLS: readonly ToolDefinition[] = [
         name: 'release',
         type: 'string',
         required: false,
-        description: 'Release name for this publication. Defaults to component.release.',
+        description: 'Release name for this publication. Defaults to app.release.',
       },
       PROJECT_ARGUMENT,
       CONTEXT_ARGUMENT,
diff --git a/packages/cli/src/pairing.ts b/packages/cli/src/pairing.ts
index 8a104ad..2584780 100644
--- a/packages/cli/src/pairing.ts
+++ b/packages/cli/src/pairing.ts
@@ -31,7 +31,7 @@ import { boundedString, exactRecord, parseJson } from './internal/json.js';
 import { isHomeId } from './internal/names.js';
 
 export const PAIRING_PATH = '/v1/pairing/redeem';
-export const DEFAULT_ISSUER = 'https://control.miakapp.com';
+export const DEFAULT_ISSUER = 'https://api.miakapp.com';
 export const PAIRING_PAGE = 'https://miakapp.com/pair';
 
 const HOME_KEY = /^mhk1_([A-Za-z0-9_-]{22})_([A-Za-z0-9_-]{43})$/;
diff --git a/packages/cli/src/project.ts b/packages/cli/src/project.ts
index 0a04fc8..7d90934 100644
--- a/packages/cli/src/project.ts
+++ b/packages/cli/src/project.ts
@@ -3,7 +3,6 @@ import { projectError } from './errors.js';
 import { canonicalHttpsUrl } from './internal/http.js';
 import {
   APP_ABI,
-  COMPONENT_ABI,
   isHomeId,
   isRelease,
   type ReleaseAbi,
@@ -98,16 +97,18 @@ export function parseProject(root: string, source: string): Project {
   const issuer = canonicalHttpsUrl(document.control_plane, 'control_plane');
   if (issuer.endsWith('/')) throw projectError('control_plane must not have a trailing slash');
 
-  const hasApp = document.app !== undefined && document.app !== null;
-  const hasComponent = document.component !== undefined && document.component !== null;
-  if (hasApp === hasComponent) {
+  if (document.component !== undefined && document.component !== null) {
     throw projectError(
-      `${PROJECT_FILE} must declare exactly one of app (a whole-house application) or component`,
-      'Use app: for a resident interface you draw yourself; component: for a semantic tree.',
+      `${PROJECT_FILE} declares component:, which Miakapp no longer displays`,
+      'Rename the section to app: and build a whole-house application (miakapp docs start).',
     );
   }
-  const section = hasApp ? 'app' : 'component';
-  const abi: ReleaseAbi = hasApp ? APP_ABI : COMPONENT_ABI;
+  if (document.app === undefined || document.app === null) {
+    throw projectError(`${PROJECT_FILE} must declare app: (a whole-house application)`);
+  }
+  const hasApp = true;
+  const section = 'app';
+  const abi: ReleaseAbi = APP_ABI;
   const component = mapping(document[section], section);
   exactKeys(component, ['artifact', 'release', 'requires'], section);
   if (!isRelease(component.release)) {
diff --git a/packages/cli/src/version.ts b/packages/cli/src/version.ts
index 9f459bb..49563fd 100644
--- a/packages/cli/src/version.ts
+++ b/packages/cli/src/version.ts
@@ -12,4 +12,4 @@
  */
 export const PACKAGE_NAME = '@miakapp/cli';
 
-export const CLI_VERSION = '4.0.0-alpha.15';
+export const CLI_VERSION = '4.0.0';
diff --git a/packages/cli/test/main.test.ts b/packages/cli/test/main.test.ts
index fc3e87e..736291e 100644
--- a/packages/cli/test/main.test.ts
+++ b/packages/cli/test/main.test.ts
@@ -57,8 +57,8 @@ describe('offline commands', () => {
           ...host,
           readSecret: async () => { secretReads += 1; throw new Error('secret prompt used'); },
         })).toBe(EXIT_CODE.success);
-        expect(host.json()['usage']).toContain('--kind <app|component>');
-        expect(host.json()['usage']).toContain('default: dist/app.js for app');
+        expect(host.json()['usage']).not.toContain('--kind');
+        expect(host.json()['usage']).toContain('default: dist/app.js)');
         expect(host.stderr()).toBe('');
         expect(secretReads).toBe(0);
         expect(files.entries.size).toBe(0);
@@ -168,7 +168,7 @@ describe('offline commands', () => {
 
   test('a missing artifact is an artifact failure', async () => {
     const files = standardProject();
-    files.entries.delete(`${PROJECT_ROOT}/dist/component.js`);
+    files.entries.delete(`${PROJECT_ROOT}/dist/app.js`);
     const host = testHost({ files });
     expect(await run(['check'], host)).toBe(EXIT_CODE.artifact);
   });
@@ -205,21 +205,6 @@ describe('offline commands', () => {
     expect(JSON.parse(second.stdout()).abi).toBe('miakapp.app/1');
   });
 
-  test('init --kind component keeps the semantic component shape', async () => {
-    const files = new MemoryFiles();
-    const host = testHost({ files });
-    expect(await run([
-      'init',
-      '--kind', 'component',
-      '--home', HOME_ID,
-      '--control-plane', 'https://control.example.test/api',
-    ], host)).toBe(EXIT_CODE.success);
-    files.entries.set(`${PROJECT_ROOT}/dist/component.js`, new TextEncoder().encode(ARTIFACT_SOURCE));
-    const second = testHost({ files });
-    expect(await run(['check', '--json'], second)).toBe(EXIT_CODE.success);
-    expect(JSON.parse(second.stdout()).abi).toBe('miakapp.component/1');
-  });
-
   test('init never overwrites an existing project file', async () => {
     const host = testHost({ files: standardProject() });
     const code = await run([
diff --git a/packages/cli/test/starter.test.ts b/packages/cli/test/starter.test.ts
index 1905758..aa90da4 100644
--- a/packages/cli/test/starter.test.ts
+++ b/packages/cli/test/starter.test.ts
@@ -56,7 +56,7 @@ describe('init --starter app', () => {
     const { code, host } = await initStarter();
     expect(code).toBe(EXIT_CODE.success);
     expect(await listing(directory)).toEqual([...STARTER_FILES, 'miakapp.yaml'].sort());
-    expect(host.json()).toMatchObject({ kind: 'app', starter: 'app', artifact: 'dist/app.js', release: '0.1.0' });
+    expect(host.json()).toMatchObject({ starter: 'app', artifact: 'dist/app.js', release: '0.1.0' });
 
     const manifest = await readFile(join(directory, 'miakapp.yaml'), 'utf8');
     expect(manifest).toContain('home: demo-home\ncontrol_plane: https://control.example.test\n');
@@ -140,7 +140,6 @@ describe('init --starter app', () => {
 
   for (const [label, argv] of [
     ['an unknown starter', ['--starter', 'component']],
-    ['a component kind', ['--starter', 'app', '--kind', 'component']],
     ['an artifact needing shell quoting', ['--starter', 'app', '--artifact', 'dist/my app.js']],
     ['an artifact outside the project', ['--starter', 'app', '--artifact', '../app.js']],
     ['an artifact that is a starter file', ['--starter', 'app', '--artifact', 'app/main.ts']],
diff --git a/packages/cli/test/support/host.ts b/packages/cli/test/support/host.ts
index 6480ba4..7e97a3c 100644
--- a/packages/cli/test/support/host.ts
+++ b/packages/cli/test/support/host.ts
@@ -9,17 +9,14 @@ export const PROJECT_YAML = `schema: miakapp.project/1
 home: test-home
 control_plane: https://control.example.test/api
 
-component:
-  artifact: dist/component.js
+app:
+  artifact: dist/app.js
   release: 2026-09-13.1
   requires:
     state_read:
       - climate.living_room.temperature
-    event_subscribe: []
-    event_publish: []
     call:
       - lighting.set
-    presentation: []
 `;
 
 export class MemoryFiles implements FileSystem {
@@ -113,6 +110,6 @@ export function testHost(options: {
 export function standardProject(artifact = ARTIFACT_SOURCE): MemoryFiles {
   return new MemoryFiles({
     [`${PROJECT_ROOT}/miakapp.yaml`]: PROJECT_YAML,
-    [`${PROJECT_ROOT}/dist/component.js`]: artifact,
+    [`${PROJECT_ROOT}/dist/app.js`]: artifact,
   });
 }