Merge branch 'codex/invariant-package-registration-gate' into codex/package-invariant-checks

# Conflicts:
#	.agents/notes/implemented/architecture/2026-07-19-package-invariant-runtime-contracts.i18n.yaml
#	.agents/notes/implemented/architecture/2026-07-19-package-invariant-runtime-contracts.md
#	.agents/notes/implemented/architecture/2026-07-19-package-invariant-runtime-contracts.zh.md
#	.agents/notes/implemented/architecture/2026-07-19-package-owned-invariant-service.i18n.yaml
#	docs/rfc/INDEX.md
#	packages/AGENTS.md

packages/ui/tui/tests/headless-terminal.ts

@@ -286,7 +286,7 @@ export class HeadlessTerminal implements Terminal {
     return violations
   }
 
-  /** Serialize terminal cells and metadata into a stable, reviewable golden. */
+  /** Serialize terminal cells and metadata into a stable, reviewable expected output. */
   async snapshot(options: TerminalSnapshotOptions = {}): Promise<string> {
     await this.flush()
     const buffer = this.emulator.buffer.active

packages/ui/tui/tests/tui.snapshot.ts

@@ -53,7 +53,7 @@ async function checkpoint(
   observedCheckpoints.add(name)
   expect(terminal.themeViolations(), `${name} must remain theme-agnostic`).toEqual([])
   const snapshot = await terminal.snapshot(options)
-  const path = join(SNAPSHOTS_DIR, `${name}.golden.txt`)
+  const path = join(SNAPSHOTS_DIR, `${name}.expected.txt`)
   if (REFRESHING) {
     await mkdir(SNAPSHOTS_DIR, { recursive: true })
     await writeFile(path, snapshot)
@@ -497,7 +497,7 @@ describe('TUI terminal-state snapshots', () => {
 afterAll(async () => {
   expect([...observedCheckpoints].sort()).toEqual([...CHECKPOINTS].sort())
   const files = (await readdir(SNAPSHOTS_DIR))
-    .filter(file => file.endsWith('.golden.txt'))
+    .filter(file => file.endsWith('.expected.txt'))
     .sort()
-  expect(files).toEqual(CHECKPOINTS.map(name => `${name}.golden.txt`).sort())
+  expect(files).toEqual(CHECKPOINTS.map(name => `${name}.expected.txt`).sort())
 })