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+# P6 — SEO + Errors + Cache + Карта полетов Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use `superpowers:subagent-driven-development` (recommended) or `superpowers:executing-plans`.
+
+**Goal:** Bring §4.1.18 (caching), §4.1.19 (microdata — JSON-LD + OpenGraph), §4.1.20 (robots.txt + canonicals), §4.1.21 (404/500 error pages), §4.1.24 (Карта полетов / Flight Map) of TZ РИ-07-2538С into compliance. This is the **final** P-plan.
+
+**Architecture:** SEO + error infrastructure exists from phase-1 (`src/ui/seo/SeoHead.tsx`, `src/shared/seo/*`, `src/routes/error/[code]/*`). Flight Map exists from phase-1 with initial P1/P2 adjustments. P6 is primarily an audit pass + gap-fill.
+
+**Tech Stack:** TypeScript, React 18, schema-dts for JSON-LD typing, Modern.js SSR.
+
+**Parent spec:** `docs/superpowers/specs/2026-04-21-online-board-schedule-tz-redesign-design.md`.
+
+**Target rule count:** §4.1.18 ≥3, §4.1.19 ≥15, §4.1.20 ≥5, §4.1.21 ≥8, §4.1.24 ≥40.
+
+---
+
+## File Structure
+
+### Files to create
+- `src/shared/seo/jsonLdBuilders.ts` + test — pure JSON-LD builders for each page type (start, search results, flight details).
+- `src/routes/robots.txt/page.tsx` (or server route handler for `/robots.txt`) — emit the TZ-prescribed robots rules.
+- Any missing Flight Map helpers or tests.
+
+### Files to modify
+- `src/features/online-board/seo.ts` — wire JSON-LD builders into each SEO result.
+- `src/features/schedule/seo.ts` — same.
+- `src/features/flights-map/seo.ts` — same.
+- `src/ui/seo/SeoHead.tsx` — verify all required meta tags emitted.
+- `src/routes/error/[code]/*` — verify 404 + 500 page content and SEO.
+- `src/features/flights-map/*` — audit per §4.1.24 rule rows.
+- spec
+
+---
+
+## Task 1: Populate §4.1.18/19/20/21/24 rules
+
+TZ line ranges (approximate):
+- §4.1.18: ~2908-2910
+- §4.1.19: ~2911-2930
+- §4.1.20: ~2931-2960
+- §4.1.21: ~2961-2984
+- §4.1.24: ~3050-3300 (end of document)
+
+Use `sed -n '2908,3300p' /tmp/ri_tz_extract/content.txt` to dump.
+
+Append rule rows. Status=TBD, Plan=P6.
+
+Target counts: §4.1.18 ≥3, §4.1.19 ≥15, §4.1.20 ≥5, §4.1.21 ≥8, §4.1.24 ≥40.
+
+Commit: `Populate rule rows for P6 subsections 4.1.18/19/20/21/24 in TZ audit spec`.
+
+---
+
+## Task 2: Resolve C5 (TZ 4.1.1-R22 typo)
+
+Per P1 Conflicts register entry C5: TZ §4.1.1 ¶9 has `"ДД.ММ.ГГГ"` (3 Г) vs the standard `"ДД.ММ.ГГГГ"` (4 Г). Resolution noted as "treat as typo correction".
+
+Verify the Flight-Map filter's `Дата рейса` placeholder uses 4 Г. If already correct, close the conflict as Resolved in the spec.
+
+Commit: `Close C5 TZ 4.1.1-R22 typo conflict (Flight-Map date placeholder uses ДД.ММ.ГГГГ)`.
+
+---
+
+## Task 3: Caching (§4.1.18)
+
+Per TZ §4.1.18:
+- Session-scope cache for search results (already implemented via cross-section store, P1).
+- Dictionary cache TTL.
+- SSR cache headers.
+
+Audit existing cache logic. Commit.
+
+---
+
+## Task 4: JSON-LD microdata (§4.1.19)
+
+For each page type, emit JSON-LD via `schema-dts` types:
+- Start pages → `WebSite` + `SearchAction`.
+- Results list → `ItemList` with `Flight` items.
+- Flight details → `Flight` (scheduled / actual times, carrier, aircraft, route).
+- Flight Map → `WebPage` + optional `Dataset` for map.
+
+Create `src/shared/seo/jsonLdBuilders.ts` with per-type builders + tests. Wire into each section's `seo.ts`.
+
+Commit per cluster.
+
+---
+
+## Task 5: OpenGraph (§4.1.19)
+
+Verify `og:*` meta tags per page:
+- `og:title`, `og:description`, `og:url`, `og:image`, `og:type`, `og:locale`, `og:site_name`.
+- Already in place via `SeoHead` — audit per-page for correctness.
+
+Commit assertion tests.
+
+---
+
+## Task 6: Robots + canonicals (§4.1.20)
+
+Per TZ:
+- Start pages emit `robots: index,follow`.
+- Result pages + details emit `robots: index,follow` (or `noindex` for volatile URLs — check TZ).
+- Canonical links on every page (normalized URL, no volatile query params).
+- hreflang alternates for all 9 languages.
+- Actual `/robots.txt` at host site (may be out of scope for this repo — check CLAUDE.md).
+
+Verify + commit.
+
+---
+
+## Task 7: 404 + 500 error pages (§4.1.21)
+
+Per TZ:
+- Unknown route → `/error/404`
+- Server error → `/error/500`
+- 404 page includes: link back to section root, top-level breadcrumb, localized message, illustration.
+- 500 page includes: refresh CTA, support contact, localized message.
+- Both pages: `noindex`; translated for all 9 languages.
+
+Verify + commit.
+
+---
+
+## Task 8: Flight Map — §4.1.24 full audit
+
+Per TZ §4.1.24 (all sub-subsections):
+- §4.1.24.1 Start page composition
+- §4.1.24.2 Filter attributes (6 parameters)
+- §4.1.24.3 Map search + rendering (spider, connecting, dots)
+- §4.1.24.4 Interactive map (click, hover, zoom, pan, highlight)
+- §4.1.24.5 Internal API
+- §4.1.24.6 "Buy ticket" CTA
+
+Largest P6 task. Iterate per sub-subsection.
+
+Commits per cluster.
+
+---
+
+## Task 9: Update spec + merge gate
+
+- [ ] Mark P6 rules Done.
+- [ ] Update Conflicts register (close C5).
+- [ ] Append merge log.
+- [ ] Commit.
+
+---
+
+## Self-Review
+
+**1. Spec coverage.** §4.1.18–21 + §4.1.24 decomposed into Tasks 3–8.
+
+**2. Placeholder scan.** Task 2 is a clean-up. Tasks 4–8 are standard audit pattern.
+
+**3. Type consistency.** `jsonLdBuilders` types align with existing `schema-dts` usage in the project.
+
+---
+
+## Execution Handoff
+
+Final plan. Execute via subagent-driven development.