# IPZ PageHeader lifecycle

- **ID:** IPZ-PAGEHEADER-LIFECYCLE-2026-08-15
- **Status:** IDLE
- **Task:** Delivery 5 PageHeader lifecycle slice
- **Source request:** Assess PageHeader from current `origin/master` and implement the smallest complete Delivery 5 lifecycle convergence. Work directly, preserve its public API, markup identity, accessibility, and callers; do not land.

## Outcome and acceptance criteria

Classify PageHeader correctly. If it is stateless, document correct ownership and add focused integration evidence. If it owns state, expose idempotent `mount()`, `update(next)`, and `destroy()` with cleanup and remount coverage. Keep public exports, markup, accessibility, caller behavior, and DOM identity unchanged. Update only truthful inventory/report records. Pass focused tests, complete admin tests and lint, production build, inventory/gate, and the dependency-ready factory gate. Make one terse local commit without landing.

## Preserved WIP and constraints

- Start from fetched `origin/master` (`06aa5cc6868a3b8572e6fd2c1a8b5defec28f383`) in this isolated worktree; preserve all unrelated work.
- Do not alter unrelated components or pages.
- Read landed lifecycle components and the Delivery 5 contract before editing.
- No delegation, skills, or external models.

## Execution steps

1. Read the Delivery 5 contract, inventory, PageHeader source/callers, and landed lifecycle references/tests.
2. Classify ownership and make the smallest compliant source/test change.
3. Regenerate required inventory/report and production assets only when source changes require them.
4. Run every requested gate and resolve all output.
5. Update this receipt and registry, commit locally with a terse message, and do not land.

## Current receipt

PageHeader is a stateless composition adapter: it delegates all DOM creation to stateless `AppFrameHeader`, retains no state, registers no resources, and has no lifecycle ownership. The layer registry already truthfully records `stateful: false`, `stateOwner: none`, and `lifecycleStatus: stateless`; the generated inventory remains consistent. Focused integration evidence verifies the exported API, existing markup/classes, heading and action nodes, absent lifecycle methods, and caller-owned insertion/removal, plus the settings variant. The focused test passed (2 tests). Full admin tests passed (50 files, 666 tests); their expected error-path logger output is pre-existing test evidence, not a test warning. Admin lint and production build passed. Inventory check, changed-file UI gate, and architecture tests passed. The first factory run exposed missing worktree-local admin dependencies; after `npm ci` installed them, `COMPOSER_PROCESS_TIMEOUT=1200 bash tools/factory-gate.sh all` passed, including syntax, PHP tests, PHPCS baseline, PHPStan, admin lint/build, and UI architecture verification. The local commit is retained and is not landed. No generated report or production asset changed because PageHeader source and its recorded classification were already correct.

## Next executable action

The verified local commit is ready for review or landing by a later explicitly authorized task; do not land it.