docs: queue section and pagination units

docs/execution/briefs/implement-plan-20a.md

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+# Implement plan 20A: compact hidden-section recovery
+
+Read approved plan 20 from local planning checkout only when HEAD equals
+`a2557b2ad40e06e1e63eb655f286e6a78fe6bf0d`; otherwise use
+`git show a2557b2ad40e06e1e63eb655f286e6a78fe6bf0d:plans/20-section-restoration.md`. Read current `AGENTS.md`, RTK,
+issue/domain guidance, relevant ADRs, and applicable brainstorming/TDD/frontend skills. Plan supplies approved UX direction;
+do not pause for routine product choices. Run root Intent inventory and load matching local skill before edits. Do not spawn
+subagents, touch ledger, mutate issues, merge, push, or create PR.
+
+Start clean from refreshed `origin/main`, rename branch `codex/issue-2921-hidden-section-recovery`, revalidate live issues
+2921/3378/3265 and open PRs, and run exact plan drift check. This unit implements 20A for verified issue 2921. Reporter
+forensics for 3378/3265 stay open. Do not claim missing/deleted content recovery or implement Layout placement in this unit.
+
+Strict TDD, exact scope:
+
+- First add failing pure tests for known printable section inventory: built-ins, summary, real custom sections; hidden and
+  placement locations independent; duplicate/later-page/sidebar locations; unknown IDs excluded; picture/basics/UI-only
+  custom container excluded; no mutation. Implement proposed `getSectionAvailability` in `@reactive-resume/resume` with an
+  explicit export. Include validated placement operation only if required by plan's shared helper contract, but do not expose
+  20B UI or auto-place anything.
+- Add failing DOM tests then compact Hidden sections UI. Keep Picture/Basics normal. Remove full editor panels only for hidden
+  printable sections. List built-in, summary, and individual custom sections by effective localized title. Show changes only
+  existing hidden flag through `useUpdateResumeData`; retain content, item order, and all saved layout IDs.
+- Preserve custom-section editor container behavior when only some custom children are hidden. Hidden-but-unplaced Show must
+  not choose placement. Sidebar icon navigation must focus/open recovery entry. Controls need accessible names, keyboard
+  behavior, locked-state disablement, and undo semantics.
+- Use named props types and existing UI primitives. New strings through Lingui workflow. No schema, PDF, importer, reset,
+  deletion, title-default, or layout-placement semantics changes.
+- Add authenticated synthetic E2E: hide built-in/summary/custom, save/reload, compact entries present, PDF text absent; Show,
+  same layout reference/output returns; undo/redo and locked state. Do not use reporter data.
+
+Record initial RED and final GREEN. Run resume/web focused tests including existing visibility/menu/navigation regressions,
+affected typechecks, boundaries, full build, and focused E2E against dedicated disposable DB. Use narrow non-writing Biome;
+disclose/inspect any write-capable `pnpm check`. Run diff/scope checks. Commit locally; no push/PR before independent review.
+
+Write `.orchestration/plan-20a-implementation.md`: live/drift state, facts vs uncertainty, RED/GREEN evidence, exact commit
+and files, tests/results, skipped gates, risks, issue-specific coverage, PR `not created`. Final response at most ten lines.

docs/execution/briefs/implement-plan-23a.md

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+# Implement plan 23A: authored-page versus overflow guidance
+
+Read approved plan 23 from local planning checkout only when HEAD equals
+`a2557b2ad40e06e1e63eb655f286e6a78fe6bf0d`; otherwise use
+`git show a2557b2ad40e06e1e63eb655f286e6a78fe6bf0d:plans/23-pagination-controls.md`. Read current `AGENTS.md`, RTK,
+issue/domain guidance, ADRs, and applicable brainstorming/TDD/frontend skills. Plan and Q10 supply approved direction; do not
+pause for routine wording/layout choices. Run root Intent inventory and load matching local skill before edits. Do not spawn
+subagents, touch ledger, mutate issues, merge, push, or create PR.
+
+Start clean from refreshed `origin/main`, rename branch `codex/issue-3090-authored-page-guidance`, revalidate issues 3090 and
+3350 plus open PRs, and run plan drift check. This is only 23A/Q10 guidance for issue 3090. Do not add item keep-together,
+widow/orphan controls, renderer-generated page records, schema changes, or claim issue 3350 fixed.
+
+TDD and bounded implementation:
+
+- Add failing Layout UI test with one authored page and multiple physical-render-page evidence/stub. Guidance must identify
+  authored pages versus automatic PDF overflow, name existing `Move to` → `New Page` and full-width controls accurately, and
+  make clear physical overflow pages are not separately saved/editable.
+- Add concise, accessible guidance at owning Layout pages surface using existing UI primitives and Lingui strings. Link or
+  focus existing controls only if current component contracts support it without new state. Preserve existing warning and
+  avoid duplicative copy.
+- Prove rendering guidance does not mutate `metadata.layout.pages`, add page records, change section assignment, or alter PDF
+  behavior. Cover keyboard/accessibility and locked state where relevant.
+- Extend synthetic Azurill case: automatic overflow retains all content; manually authored second full-width page remains an
+  independent saved layout choice. Do not promise independent styling of physical overflow.
+
+Record initial RED then GREEN. Run focused Layout/page tests, relevant PDF pagination regression if touched by test harness,
+web typecheck, boundaries, full build, focused E2E if existing infrastructure can observe guidance without private data,
+Lingui extraction/catalog checks, narrow non-writing Biome, `git diff --check`, and scope review. Commit locally; no push/PR
+before independent review.
+
+Write `.orchestration/plan-23a-implementation.md`: live/drift state, facts vs uncertainty, RED/GREEN, exact commit/files,
+tests/results, skipped gates, risks, partial issue coverage, PR `not created`. Final response at most ten lines.