feat(seo/geo): CMS plugin-first + shared-file edit discipline + Bing/IndexNow mandatory

Post-review hardening of the parallel seo+geo dispatch:

- skills/seo/SKILL.md: shared-file edit discipline embedded in both dispatch prompts (Edit-only on shared templates, Write only on sole-owned files). CROSS-AGENT NOTES flow clarified — dispatcher escalates to SEO.md §11 as user action with automation options (Option B).
- agents/seo-analyzer.md: STEP 2 detects 8 CMS (WordPress/Drupal/Magento/Shopify/Joomla/PrestaShop/Ghost/Wix-Squarespace-Webflow) and presence of SEO plugins. STEP 10 emits P0 quick win "install CMS plugin" when CMS detected without plugin. STEP 5 expands topic clusters / silos sémantiques. Framework notes in STEP 12 cover all 8 CMS explicitly.
- agents/geo-analyzer.md: STEP 6 checks /faq path + FAQPage schema presence. STEP 11 mandates 3 AI-index user actions per FULL audit (Bing Webmaster Tools / GSC / IndexNow) + Apple Business Connect for local business.
- agents/resources/automation-catalog.md: new structured CMS plugin section (install links + pricing per platform). AI-index submission section rewritten with Bing Webmaster as canonical entry for ChatGPT Search/Copilot/DuckDuckGo, IndexNow protocol details, Brave Web Discovery, Apple Business Connect.
- agents/resources/llms-txt-template.md: explicit note that /ai.txt and /about-data are NOT real standards; llms.txt (Jeremy Howard) remains the only proposed one.

Rationale: third-party AI review of the skill surfaced 5 gaps — race condition on shared templates (Layout.astro holds meta + JSON-LD), ambiguous cross-agent flow, missing CMS-plugin-first logic (Gemini), under-exposed Bing Webmaster (ChatGPT Search channel), and minor accuracy items.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

agents/geo-analyzer.md

@@ -263,6 +263,32 @@ For each JSON-LD block found, check:
 4. **Graph integrity** — do `@id` references connect? No orphans?
 5. **sameAs coverage** — does it include the main authoritative URIs?
 
+### FAQ page presence (universal check)
+
+ChatGPT, Gemini, Perplexity citation rates spike on sites with a
+dedicated FAQ page. Check:
+
+```bash
+# FR + EN FAQ paths
+for p in /faq /questions /questions-frequentes /aide /help /support; do
+  find . -maxdepth 3 -path "*${p}*" 2>/dev/null | head -3
+done
+
+# FAQ schema presence
+grep -rE '"@type"\s*:\s*"(FAQPage|QAPage)"' --include="*.html" --include="*.astro" --include="*.tsx" --include="*.php" --include="*.vue" . 2>/dev/null | head -10
+```
+
+Emit finding:
+```
+FAQ PAGE       : present at <path> | absent
+FAQ SCHEMA     : FAQPage (collection) | QAPage (single Q) | none
+Q&A COUNT      : <n> | not applicable
+RECOMMENDATION : CREATE /faq with 20-50 real customer questions (P0 for GEO) | ADD schema to existing page | OK
+```
+
+If absent and site is informational/service/B2B → emit as MEDIUM-term
+action (G5 batch, confirmation needed — visible page creation).
+
 ### Gaps to fix — by site type
 
 **Content site / blog:**
@@ -271,6 +297,7 @@ For each JSON-LD block found, check:
 - [ ] `dateModified` matches last content update
 - [ ] `speakable` on TL;DR / summary block
 - [ ] `BreadcrumbList` on every non-home page
+- [ ] FAQ page with `FAQPage` schema — even 10 real questions lift AI citations
 
 **Local business:**
 - [ ] `LocalBusiness` with most specific subclass (Plumber/Dentist/etc.)
@@ -513,6 +540,23 @@ High-impact, low-effort. For each:
 - Expected impact (high/medium/low)
 - AUTO (executed in STEP 13) or USER (documented in §11 of SEO.md)
 
+**MANDATORY user action — AI index submission**: every FULL audit
+MUST emit these 3 user actions (they are the entry points for AI
+search engines into your site):
+
+1. **Bing Webmaster Tools** — submit + verify sitemap. Critical
+   because ChatGPT Search, Copilot, DuckDuckGo index through Bing.
+2. **Google Search Console** — submit + request indexing for key
+   pages. Google AI Overviews ground on this index.
+3. **IndexNow** — enable via plugin (RankMath, Yoast, Cloudflare) or
+   custom endpoint. Proactive push to Bing/Yandex/Seznam.
+
+See `~/.claude/agents/resources/automation-catalog.md` →
+"Submit to AI indexes directly" for URLs + automation tools.
+
+Additionally, if business is local: **Apple Business Connect**
+(feeds Apple Maps + Apple Intelligence local discovery).
+
 ### Medium term (1-3 months)
 
 - Entity SEO campaigns (Wikidata creation with source gathering)
@@ -764,6 +808,13 @@ PROCHAINE ETAPE : <highest-priority>
 - **Focus on GEO, not classical SEO.** Overlapping concerns (meta
   title, sitemap, Core Web Vitals) belong to `seo-analyzer`. Do not
   duplicate. Reference them in §13 as "see SEO section" if needed.
+- **Shared-file edit discipline.** On template files shared with
+  `seo-analyzer` (Layout.astro, index.html, base.html.twig, etc.),
+  your sub-agents (`hotfixer`/`feater`) MUST use `Edit` with a narrow
+  `old_string` targeting ONLY your owned concern (JSON-LD block).
+  NEVER `Write` on shared templates. `Write` is reserved for files
+  you solely own: robots.txt, llms.txt, llms-full.txt. Full-template
+  refactor → escalate as user action in §11.
 - **Respect PERMISSIVE/RESTRICTIVE choice.** Per user CLAUDE.md,
   default is PERMISSIVE. Only switch if client explicitly flags
   premium/regulated content.

agents/resources/automation-catalog.md

@@ -52,11 +52,38 @@ See `ai-visibility-tools.md`. Summary:
 - **OtterlyAI, Peec AI, Trendos, ZipTie, HubSpot AEO, SE Ranking** — commercial
 - **Manual spreadsheet + 20 queries/mois** — free, ~1h/mois
 
-### Submit to AI indexes directly
-
-- **Bing Webmaster Tools** → submits to Bing + Copilot + ChatGPT Search (which uses Bing index)
-- **IndexNow protocol** (indexnow.org) → proactive ping to Bing/Yandex
-- **Google Search Console + URL Inspection** → request indexing (no ChatGPT index direct submit exists in 2026)
+### Submit to AI indexes directly (MANDATORY user action on FULL audit)
+
+AI engines read from these indexes:
+- ChatGPT Search, Copilot, DuckDuckGo, Ecosia → **Bing index**
+- Google AI Overviews, Gemini (grounding mode) → **Google index**
+- Perplexity, Brave AI → **own crawlers + Bing fallback**
+
+Therefore: submit to GSC + Bing Webmaster minimum on every FULL audit.
+
+- **Bing Webmaster Tools** (FREE) — https://www.bing.com/webmasters
+  Critical because ChatGPT Search, Copilot, DuckDuckGo all use Bing.
+  Features: URL inspection, sitemap submission, keyword research, SEO
+  reports, IndexNow API integration. Plugin for WordPress available.
+  Setup: 10 min (verify domain via meta tag or DNS).
+- **Google Search Console** (FREE) — https://search.google.com/search-console
+  Covers Google search + AI Overviews grounding. URL inspection tool
+  requests live re-indexing (faster than waiting for crawl).
+- **IndexNow protocol** (FREE) — https://www.indexnow.org
+  Proactive ping to Bing + Yandex + Seznam + DuckDuckGo. One-line
+  API call per URL change. Plugins: Yoast (built-in), RankMath,
+  Cloudflare (zone-level), Cloudflare Workers snippet. For custom
+  sites: `curl` POST to `https://api.indexnow.org/indexnow`.
+- **Brave Web Discovery** (FREE) — enable in Brave browser settings
+  → "Aider Brave Search à découvrir du contenu". Visit your site in
+  Brave browser to help its indexation. Brave Search uses this for
+  index discovery, and Brave AI answers pull from Brave Search.
+- **Kagi submit** (requires Kagi account) — smaller audience but
+  growing for privacy-focused search.
+- **Apple Business Connect** → Apple Maps + Apple Intelligence local
+  discovery. Free but requires Apple ID. https://businessconnect.apple.com
+- No direct "submit to ChatGPT" exists in 2026 — submission to Bing
+  is the canonical path.
 
 ### Maintain llms.txt / llms-full.txt
 
@@ -113,12 +140,121 @@ typically batch D (structural change, user approval needed).
 - **SEOClarity** (enterprise) → content decay tracking
 - **Manual** — spreadsheet of top 50 pages + quarterly review cycle
 
+## CMS plugin-first — install before editing templates
+
+**Rule**: when the site runs on a CMS, the highest-priority SEO action
+is to install/configure the SEO plugin. Manual template edits
+duplicate the plugin's output and create maintenance debt.
+
+### WordPress (2026 recommendations)
+
+- **RankMath Free** — default recommendation. Most features in free
+  tier, including Schema.org (Article, LocalBusiness, FAQ, HowTo,
+  Product), breadcrumbs, sitemap, redirect manager, GSC integration,
+  GEO-aware (content AI score).
+  Install: Plugins → Add New → "Rank Math SEO" → Install → Activate.
+  Setup wizard: ~10 min.
+- **Yoast SEO Free** — most popular. Strong for meta + sitemap +
+  readability. Schema.org basic in free, extended in Premium (99 USD/an).
+- **Yoast SEO Premium** (99 USD/an) — redirect manager, internal
+  linking suggestions, multiple focus keywords.
+- **SEOPress Free** — French origin, GDPR-friendly, good Schema.org
+  coverage.
+- **SEOPress Pro** (49-99 EUR/an) — white-label, WooCommerce Schema,
+  Google Analytics integration.
+- **AIOSEO (All-in-One SEO)** — older player, solid baseline.
+- **Slim SEO** — minimalist, auto-configuration, good for sites that
+  need SEO without admin complexity.
+
+Recommendation if unsure: **RankMath Free** → upgrade to RankMath Pro
+(59 USD/an) only if Analytics integration or Schema Pro needed.
+
+### Shopify
+
+- **Plug in SEO** (free + 20 USD/mois) — scans store for SEO issues,
+  suggests fixes, handles meta templates for products/collections.
+- **Smart SEO** (10-30 USD/mois) — auto-generates alt tags, meta
+  tags, JSON-LD (Product, Organization, Breadcrumbs).
+- **SEO Manager** (20 USD/mois) — image SEO, structured data, 404
+  redirects.
+- **Avada SEO** — newer, good GEO-aware features.
+- Shopify native: configure via Admin → Online Store → Preferences
+  (title, meta description, homepage), + per-product meta fields.
+
+### Drupal (7/8/9/10)
+
+Core SEO stack (install as modules, free):
+- **Metatag** — meta tags (OG, Twitter Card, canonical)
+- **Simple XML Sitemap** — sitemap generation
+- **Pathauto** — clean URLs
+- **Schema.org Metatag** — JSON-LD Schema.org output
+- **Yoast SEO Drupal** — on-page readability + focus keyword analysis
+- **Redirect** — 301 redirects
+- **Google Analytics** — GA4 integration
+
+### Magento 1 / 2
+
+Native Magento SEO is decent but limited. Paid extensions dominate:
+- **SEO Suite Ultimate (Mageworx)** — canonical, URL rewrites, rich
+  snippets, meta templates (~250-500 EUR one-time)
+- **Mirasvit SEO Suite** — similar scope, 149-399 USD
+- **Amasty SEO Toolkit** — HTML sitemap, rich snippets, meta
+  templates
+- Free basics: configure native URL rewrites + meta defaults in
+  System → Configuration → Catalog → SEO
+
+### PrestaShop
+
+- **PrestaShop SEO Expert** (free + paid) — meta templates, rich
+  snippets, image alt rules
+- **JMarket SEO Pack** — structured data + breadcrumbs
+- **Advanced SEO** module — meta per category/product with
+  placeholders
+- Native: Configure → Shop Parameters → Traffic & SEO
+
+### Joomla
+
+- **JoomSEF** — URL rewriting + meta management
+- **sh404SEF** — commercial (~60 EUR/year), full SEO suite
+- **4SEO** — native integration, comprehensive
+- **OSMap** — sitemap generator (free)
+
+### Ghost
+
+Native SEO is strong (meta + OG + Twitter Card + JSON-LD Article/Author
+out of box). Customization via theme `default.hbs` + routes.yaml.
+Plugins unnecessary for most sites.
+
+### Wix / Squarespace / Webflow (hosted CMS)
+
+**No theme file access.** All SEO changes happen in the admin UI:
+- **Wix** — SEO panel per page; Wix SEO Wiz for guided setup;
+  redirects in Settings → Custom Domain → URL Redirects.
+- **Squarespace** — Per-page SEO tab (title, description, image);
+  sitewide in Settings → Marketing → SEO; URL slugs editable.
+- **Webflow** — Page Settings per page (meta title, description,
+  OG image); sitemap at `/sitemap.xml` (auto); robots.txt in Project
+  Settings → SEO.
+
+Agent cannot auto-apply anything on these platforms — emit detailed
+USER action list per panel.
+
+### Extension of this catalog for NEW CMS
+
+If detected CMS not listed above, agent runs WebSearch:
+```
+web_search: <CMS name> best SEO plugin 2026
+```
+and emits findings with pricing in the report.
+
+---
+
 ## Technical SEO actions
 
 ### Generate sitemaps
 
 - **Framework plugin** — `@astrojs/sitemap`, `next-sitemap`, `@nuxtjs/sitemap`, `rails-sitemap-generator`, etc.
-- **Yoast / RankMath** (WordPress) → auto-generate
+- **Yoast / RankMath / SEOPress** (WordPress) → auto-generate (see CMS plugins section above)
 - **Screaming Frog** (200 GBP/an) → crawler-based generation
 - Manual: only as last resort, hand-maintained sitemaps go stale fast
 

agents/resources/llms-txt-template.md

@@ -7,6 +7,12 @@
 extract content via `/llms.txt`. A Search Engine Land study (2025) found
 8 of 9 sites saw no measurable traffic change after adoption.
 
+**Not to be confused with `/ai.txt`**: some blog posts and AI-generated
+articles recommend a file named `/ai.txt` or `/about-data`. These are
+NOT real standards — no spec exists, no AI engine reads them. If someone
+asks about `/ai.txt`, the correct answer is "use `llms.txt` instead, it
+is the only emerging proposed standard (Jeremy Howard, Sept 2024)".
+
 **Why include it anyway**:
 - Low cost (small static file).
 - Real value for developer-facing sites — AI coding assistants (Cursor,

agents/seo-analyzer.md

@@ -95,6 +95,57 @@ Rails, Django, other.
 
 Record rendering: **SSR / SSG / SPA / hybrid / ISR**.
 
+### CMS detection + SEO plugin presence (plugin-first strategy)
+
+Before proposing any manual edit, detect if the site runs on a CMS
+and whether a SEO plugin is already handling the heavy lifting. If a
+CMS is detected WITHOUT a SEO plugin, the highest-priority quick win
+is to install the appropriate plugin — editing theme files manually
+is a last resort and creates maintenance debt.
+
+```bash
+# WordPress signals
+[ -f wp-config.php ] && echo "CMS: WordPress"
+ls wp-content/plugins 2>/dev/null | head -20
+# Common SEO plugins
+ls wp-content/plugins 2>/dev/null | grep -iE "yoast|wordpress-seo|seo-by-rank-math|rank-math|seopress|all-in-one-seo|aioseo|squirrly|slim-seo"
+
+# Drupal signals
+[ -f core/CHANGELOG.txt ] && echo "CMS: Drupal"
+find . -maxdepth 3 -name "*.info.yml" 2>/dev/null | xargs -I{} grep -l "yoast_seo\|metatag\|pathauto\|simple_sitemap" {} 2>/dev/null | head -5
+
+# Magento / Shopify / PrestaShop / Joomla signals
+[ -f composer.json ] && grep -iE "magento|shopify|prestashop|joomla" composer.json 2>/dev/null
+[ -f config.xml ] && echo "CMS: Magento (likely)"
+[ -f configuration.php ] && grep -q "JConfig" configuration.php 2>/dev/null && echo "CMS: Joomla"
+# Shopify: detected via theme files (shopify.theme.toml, config/settings_data.json)
+[ -f config/settings_data.json ] && [ -d sections ] && echo "CMS: Shopify (theme source)"
+
+# Ghost signals
+[ -f config.production.json ] && grep -q "ghost" config.production.json 2>/dev/null && echo "CMS: Ghost"
+
+# Webflow / Wix / Squarespace: usually hosted — detected only via live HTML
+# (FULL depth check: curl home page and look for meta generator tag)
+```
+
+Record:
+```
+CMS CONTEXT
+CMS              : WordPress | Drupal | Magento | Shopify | Joomla | PrestaShop | Ghost | Webflow | Wix | Squarespace | none (custom)
+SEO PLUGIN       : <name + version> | ABSENT | N/A (not CMS)
+PLUGIN COVERAGE  : meta | sitemap | OG | JSON-LD | breadcrumbs | redirects | <list>
+GAP              : <what the plugin does NOT cover — the agent will touch that>
+RECOMMENDATION   : KEEP & CONFIGURE plugin | INSTALL <plugin> (P0 quick win) | MANUAL EDITS (no CMS)
+```
+
+**Decision rule**:
+- CMS + SEO plugin present → CONFIGURE it via admin UI (settings). Do
+  NOT duplicate its output by editing theme files.
+- CMS + no SEO plugin → emit P0 quick win in STEP 10: "Install
+  <recommended plugin>" with direct link + automation catalog refs.
+  Manual theme edits only on concerns the plugin does not cover.
+- No CMS (custom code) → full manual edit via hotfixer/feater as usual.
+
 ### Infrastructure signals
 
 ```bash
@@ -329,7 +380,7 @@ Each embedded or self-hosted video should have:
 - `<track kind="captions">` if self-hosted
 - Thumbnail with OG image or structured data
 
-### Internal linking
+### Internal linking + topic clusters (silos sémantiques)
 
 Sample critical pages. Check:
 - Every important page reachable within 3 clicks from homepage?
@@ -337,6 +388,29 @@ Sample critical pages. Check:
 - Footer has key legal + service links?
 - Orphan pages (no inbound internal links)?
 
+**Topic clusters (silos sémantiques)** — beyond basic navigation,
+evaluate whether the site organises content into topical silos:
+- **Pillar page** (broad topic, e.g. "Guide complet SEO local") —
+  authoritative, long-form, targets head keyword.
+- **Cluster pages** (narrow sub-topics, e.g. "Comment optimiser GMB",
+  "NAP cohérent") — each links TO the pillar + back is linked FROM
+  the pillar.
+- **Cross-cluster links** — minimized; each silo should be internally
+  cohesive.
+
+Why this matters for both classical SEO and GEO:
+- Classical: Google uses topical authority as ranking signal (2024+
+  Helpful Content + E-E-A-T). Clustered sites rank entire clusters,
+  not just individual pages.
+- GEO: AI engines extract the whole cluster when answering a query
+  — a well-linked cluster gets cited more often than isolated pages.
+
+Flag:
+- Pages listed in nav but not linked from related content (orphans
+  within their topic)
+- Pillar pages lacking inbound links from their clusters
+- Excessive cross-cluster linking (dilutes topical authority)
+
 ### Accessibility signals (a11y contributes to ranking)
 
 ```bash
@@ -543,6 +617,21 @@ For each:
 
 AUTO items are a commitment, not a suggestion.
 
+**P0 rule — CMS plugin first**: if STEP 2 detected a CMS without a
+SEO plugin, the FIRST quick win MUST be plugin installation. Reason:
+installing RankMath/Yoast/SEOPress (WordPress), Yoast SEO (Drupal),
+SEO Suite Ultimate (Magento), Plug in SEO (Shopify) takes ~15 min
+via admin UI and delivers meta + sitemap + OG + breadcrumbs + JSON-LD
+in one shot. Editing theme files by hand before this creates
+duplication, conflicts, and maintenance debt. See
+`~/.claude/agents/resources/automation-catalog.md` CMS plugins
+section for the exact install path per CMS.
+
+**P0 rule — Bing Webmaster Tools**: on FULL audit, ALWAYS emit
+"Submit site to Bing Webmaster Tools" as a user action — ChatGPT
+Search uses the Bing index, so this is also a GEO signal. See
+automation-catalog.md for IndexNow + Bing.
+
 ### Medium term (1-3 months)
 City/service pages (30/70 rule: 30% shared, 70% unique per city),
 blog launch, review campaigns, citation cleanup, image optimization
@@ -682,7 +771,14 @@ Include in every sub-agent prompt:
 - **SvelteKit** — `<svelte:head>` or `+layout.server.ts` load. Custom sitemap endpoint.
 - **Static HTML / PHP** — edit `<head>` directly. `.htaccess` for redirects.
 - **React SPA** — flag SEO severely limited without SSR. `react-helmet` helps metadata but content indexation breaks. Recommend migration to Next.js/Astro. Note this in §0 (major alerts).
-- **WordPress** — Yoast/RankMath/SEOPress handle meta + sitemap. Do not duplicate.
+- **WordPress** — If a SEO plugin (Yoast, RankMath, SEOPress, AIOSEO, Slim SEO) is present: configure via admin UI only, do NOT edit theme files for concerns the plugin covers (meta, OG, sitemap, breadcrumbs, JSON-LD). If ABSENT: P0 quick win = install plugin before any manual edit. Default recommendation 2026: **RankMath Free** (most features in free tier, Schema.org and GEO-aware).
+- **Drupal** — SEO modules: Yoast SEO, Metatag, Pathauto, Simple XML Sitemap, Schema.org Metatag. If present: configure modules. If absent: P0 = enable Metatag + Simple XML Sitemap + Pathauto (core SEO stack).
+- **Magento (1/2)** — Native SEO decent but limited. Recommended: **SEO Suite Ultimate (Mageworx)** or **Mirasvit SEO Suite**. Configure URL rewrites, meta templates, rich snippets in admin.
+- **Shopify** — Editing: theme files (`theme.liquid`, `product.liquid`, `article.liquid`). Plugins: **Plug in SEO**, **SEO Manager**, **Smart SEO** auto-handle most items. For JSON-LD products: Shopify has partial native support; extend via Smart SEO.
+- **PrestaShop** — Native SEO OK. Modules: **PrestaShop SEO Expert**, **JMarket SEO**, built-in meta editors. Configure URL structure + meta defaults in admin before touching templates.
+- **Joomla** — SEO extensions: **JoomSEF**, **sh404SEF**, **4SEO**. Configure in admin.
+- **Ghost** — Native SEO strong (meta + OG + JSON-LD out of box). Usually no plugin needed; handle gaps via `default.hbs` edits.
+- **Wix / Squarespace / Webflow (hosted CMS)** — No theme file access. ALL SEO changes happen in the admin UI: meta, alt, sitemap, redirects, JSON-LD (partial). Agent emits detailed USER action list per panel to touch — cannot auto-apply anything.
 
 ### Landing page rule
 
@@ -858,6 +954,13 @@ PROCHAINE ETAPE : <highest-priority>
 ### Scope
 - **Autonomous fixes = markup, assets, config, legal pages.** Never
   change business logic, layout, styles, routing unless confirmed.
+- **Shared-file edit discipline.** On template files shared with
+  `geo-analyzer` (Layout.astro, index.html, base.html.twig, etc.),
+  your sub-agents (`hotfixer`/`feater`) MUST use `Edit` with a narrow
+  `old_string` targeting ONLY your owned concern (meta tags). NEVER
+  `Write` on shared templates. `Write` is reserved for files you
+  solely own: sitemap.xml, .htaccess, legal pages, new city/service
+  pages. Full-template refactor → escalate as user action in §11.
 - **Landing page protection.** Zero visible change except meta tags,
   footer links, JSON-LD, image optimization.
 - **Preserve existing valid SEO.** Don't rewrite correct tags.

skills/seo/SKILL.md

@@ -120,8 +120,38 @@ their dispatch prompts:
 | Video transcripts | **seo-analyzer** (user action) | |
 
 If either agent detects a finding in a file it doesn't own, it emits
-a "CROSS-AGENT NOTE" in its envelope; the dispatcher forwards it to
-the owning agent at merge time. No direct cross-agent fix.
+a "CROSS-AGENT NOTE" in its envelope. The dispatcher does NOT re-spawn
+the owning agent (both have finished by merge time). Instead, cross-agent
+findings are escalated into `SEO.md §11 — Actions utilisateur requises`
+with an explicit "Automatisation possible avec: ..." block pulled from
+`automation-catalog.md`. This is the Option B resolution (chosen by
+user): simpler than a coordinator agent, aligns with the "every user
+action lists automation" rule, and avoids architectural complexity.
+
+### Shared-file edit discipline (prevents last-writer-wins)
+
+Ownership is by *concern*, not by *file*. A single template
+(`Layout.astro`, `index.html`, `base.html.twig`, `_document.tsx`…)
+typically contains BOTH concerns simultaneously:
+  - meta tags (seo-analyzer)
+  - JSON-LD blocks (geo-analyzer)
+
+When the agents' sub-agents (hotfixer/feater) run in parallel they
+could both target the same physical file. To avoid a `Write`-based
+last-writer-wins scenario:
+
+**Rule** (embedded in both agent dispatch prompts below):
+
+> On any shared template file (anything containing multiple owned
+> concerns), use the `Edit` tool with a **narrow, targeted** `old_string`
+> that encloses ONLY your owned concern. NEVER use `Write` (full-file
+> rewrite) on a shared template. `Write` is reserved for files you
+> are the sole owner of (sitemap.xml, robots.txt, llms.txt, legal
+> pages, new city pages, .htaccess).
+
+If a sub-agent determines `Edit` is insufficient (e.g. full template
+refactor needed), it must STOP and escalate as a cross-agent note —
+the dispatcher handles via §11 user action instead.
 
 ## STEP 1 — Spawn both agents IN PARALLEL
 
@@ -161,8 +191,20 @@ FILE OWNERSHIP (authoritative, prevents parallel-edit conflicts):
 - YOU READ-ONLY: robots.txt (geo-analyzer owns), JSON-LD blocks
   (geo-analyzer owns structure; you flag NAP inconsistencies), llms.txt.
 - CROSS-AGENT NOTES: if you find issues in files you don't own, emit
-  them in your envelope under "CROSS-AGENT NOTES TO geo-analyzer:"
-  — the dispatcher forwards.
+  them in your envelope under "CROSS-AGENT NOTES TO geo-analyzer:".
+  Dispatcher escalates each note to SEO.md §11 as user action (with
+  automation options). Do NOT attempt direct cross-agent fix.
+
+SHARED-FILE EDIT DISCIPLINE (last-writer-wins prevention):
+- On shared templates (Layout.astro, index.html, base.html.twig, etc.)
+  where meta tags + JSON-LD coexist, your sub-agents (hotfixer/feater)
+  MUST use `Edit` with a targeted `old_string` enclosing ONLY your
+  concern (meta tags). NEVER use `Write` (full-file rewrite) on shared
+  templates.
+- `Write` is allowed only on files where you are the sole owner:
+  sitemap.xml, .htaccess, legal pages, new city/service pages.
+- If full-template refactor is needed, STOP and emit as a cross-agent
+  note → user action in §11.
 
 Execute your agent spec at ~/.claude/agents/seo-analyzer.md starting
 at STEP 2 (skip STEP 0 and STEP 1 — context is provided above).
@@ -196,8 +238,20 @@ FILE OWNERSHIP (authoritative, prevents parallel-edit conflicts):
 - YOU READ-ONLY: sitemap.xml, .htaccess, meta tags, heading structure
   (seo-analyzer owns structure), legal pages, images, hreflang.
 - CROSS-AGENT NOTES: if you find issues in files you don't own, emit
-  them in your envelope under "CROSS-AGENT NOTES TO seo-analyzer:"
-  — the dispatcher forwards.
+  them in your envelope under "CROSS-AGENT NOTES TO seo-analyzer:".
+  Dispatcher escalates each note to SEO.md §11 as user action (with
+  automation options). Do NOT attempt direct cross-agent fix.
+
+SHARED-FILE EDIT DISCIPLINE (last-writer-wins prevention):
+- On shared templates (Layout.astro, index.html, base.html.twig, etc.)
+  where meta tags + JSON-LD coexist, your sub-agents (hotfixer/feater)
+  MUST use `Edit` with a targeted `old_string` enclosing ONLY your
+  concern (JSON-LD block). NEVER use `Write` (full-file rewrite) on
+  shared templates.
+- `Write` is allowed only on files where you are the sole owner:
+  robots.txt, llms.txt, llms-full.txt.
+- If full-template refactor is needed, STOP and emit as a cross-agent
+  note → user action in §11.
 
 Execute your agent spec at ~/.claude/agents/geo-analyzer.md starting
 at STEP 2 (skip STEP 0 and STEP 1 — context is provided above).
@@ -312,6 +366,29 @@ Legal compliance). Merge rule:
   and the other says "keep schema X", flag explicitly in §0 and let
   the user decide
 
+### CROSS-AGENT NOTES handling (Option B — §11 escalation)
+
+When an envelope contains a `CROSS-AGENT NOTES TO <other-agent>:`
+block, the dispatcher:
+
+1. Does NOT re-spawn the target agent (it has finished).
+2. Converts each note into a §11 user action entry with the format:
+   ```
+   ### <action title> (cross-agent note from <source-agent>)
+
+   **Contexte:** <source-agent> a détecté ce point dans un fichier
+   appartenant à <target-agent>, mais l'audit parallèle s'est terminé
+   avant échange.
+
+   **Action:** <what to do>
+
+   **Automatisation possible avec:** <pull from automation-catalog.md>
+
+   **Effort manuel:** <estimate>
+   ```
+3. Tags it visibly in §0 if it's a legal/compliance blocker.
+4. Keeps these notes visible on re-run — they don't silently vanish.
+
 ## STEP 3 — Console summary
 
 ```