---
phase: 3
slug: page-metadata-pagination
status: draft
nyquist_compliant: true
wave_0_complete: false
created: 2026-05-22
---

# Phase 3 — Validation Strategy

> Per-phase validation contract for page metadata and paginator-semantic work.

---

## Test Infrastructure

| Property | Value |
|----------|-------|
| **Framework** | shell assertions + Xcode build smoke + demo EPUB diagnostics |
| **Config file** | none — repo still has no dedicated XCTest target for this phase |
| **Quick run command** | `test -f .planning/phases/03-page-metadata-pagination/03-RESEARCH.md && test -f .planning/phases/03-page-metadata-pagination/03-PATTERNS.md` |
| **Full suite command** | `xcodebuild -workspace ReadViewDemo/ReadViewDemo.xcworkspace -scheme ReadViewDemo -destination 'platform=iOS Simulator,name=iPhone 17' build` |
| **Estimated runtime** | ~60-90 seconds |

## Sampling Rate

- **After every task commit:** Run the task’s `rg` assertions against touched rendering/pagination files.
- **After every wave:** Run the `ReadViewDemo` simulator build smoke.
- **Before `$gsd-verify-work`:** Demo sample EPUB diagnostics must still pass, and Phase 3 plans/summaries must exist.
- **Max feedback latency:** 90 seconds

## Per-Task Verification Map

| Task ID | Plan | Wave | Requirement | Secure Behavior | Test Type | Automated Command | Status |
|---------|------|------|-------------|-----------------|-----------|-------------------|--------|
| 03-01-01 | 01 | 1 | REND-03 | Page/chapter models expose richer metadata without dropping offset continuity | source | `rg -n "metadata|attachment|block|pageStartOffset|pageEndOffset|fragmentOffsets" Sources/RDReaderView/EPUBTextRendering Sources/RDReaderView/EPUBCore` | ⬜ pending |
| 03-02-01 | 02 | 2 | REND-04 | Paginator no longer relies on pure visible-range slicing and introduces layouter/frame semantics | source | `rg -n "Layouter|LayoutFrame|pageBreak|avoid|attachment|CTTypesetter|CTFramesetter" Sources/RDReaderView/EPUBTextRendering` | ⬜ pending |
| 03-03-01 | 03 | 3 | REND-03, REND-04 | Sample EPUBs and page diagnostics prove large blocks/images keep offset-compatible pagination | smoke/source | `rg -n "diagnostic|metadata|page break|attachment|image|block" Sources/RDReaderView ReadViewDemo/ReadViewDemo` | ⬜ pending |

## Wave 0 Requirements

- [ ] `ReadViewDemo/ReadViewDemo.xcworkspace` and `ReadViewDemo` scheme still build before close-out.
- [ ] Validation continues to use `ReadViewDemo/ReadViewDemo/book/` as the regression corpus.
- [ ] No plan may remove `pageStartOffset`, `pageEndOffset`, or fragment offset compatibility.

## Manual-Only Verifications

| Behavior | Requirement | Why Manual | Test Instructions |
|----------|-------------|------------|-------------------|
| Large blocks and images break at better boundaries | REND-04 | Visual edge quality still needs a human read-through | Open a sample EPUB with images and long paragraphs; confirm boundaries are improved versus old slicing. |
| Highlight/search navigation still lands on the correct page after repagination | REND-03, REND-04 | Requires end-to-end interaction with existing reader flow | Use the demo reader to navigate to saved ranges or search matches after pagination changes. |

## Validation Sign-Off

- [ ] All tasks have automated verification commands
- [ ] Sampling continuity: no 3 consecutive tasks without automated verify
- [ ] Wave 0 covers offset-compatibility invariants
- [ ] No watch-mode flags
- [ ] Feedback latency < 90s
- [ ] `nyquist_compliant: true` set in frontmatter

**Approval:** pending