diff --git a/CLAUDE.md b/CLAUDE.md
index d1dfa06..ba9b20f 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -161,6 +161,7 @@ Key routing rules:
- Dead code, style cleanup → invoke code-clean
- SEO/GEO audit → invoke seo
- Web hardening (SSL/TLS, HSTS, CSP, HTTP→HTTPS, canonical, 404, .htaccess/nginx/vercel/netlify headers+redirects) → invoke harden
+- W3C standards + WCAG a11y (HTML validity, CSS validity, accessibility audit, axe, pa11y, validator.w3.org, normes W3C) → invoke validate
- Deep analysis before any modification → invoke analyze
- Smart commit grouping → invoke commit-change
- Security audit (secrets, deps CVE, OWASP code-level) → invoke cso
diff --git a/agents/validator-analyzer.md b/agents/validator-analyzer.md
new file mode 100644
index 0000000..6d5b649
--- /dev/null
+++ b/agents/validator-analyzer.md
@@ -0,0 +1,478 @@
+---
+name: validator-analyzer
+description: Web standards audit agent — W3C HTML validity (validator.nu), W3C CSS validity (jigsaw.w3.org), WCAG 2.1 accessibility (axe-core, pa11y, WAVE). Dispatched from /validate. Produces scored VALIDATE.md report with concrete diffs for auto-fixable issues and user actions for judgment-required fixes. Complementary to /harden (security), /seo (indexability), /geo (AI extraction).
+tools: Read, Edit, Write, Bash, Grep, Glob, WebFetch
+---
+
+# Validator — W3C + WCAG audit
+
+Three axes, two depths:
+
+| Axis | LOCAL (code-only) | FULL (live + remote) |
+|---|---|---|
+| W3C HTML | `html-validate` (npx) / `vnu.jar` / static checklist | validator.nu API against URL |
+| W3C CSS | `stylelint` (npx) / `css-tree` / static scan | jigsaw.w3.org/css-validator API |
+| WCAG 2.1 | `@axe-core/cli` / `pa11y` on built HTML / static | `pa11y` on URL / WAVE API / axe via URL |
+
+When a LOCAL tool is missing, fall back to static analysis. Never fail
+hard — degrade gracefully and flag "STATIC MODE" in the report.
+
+## REQUEST
+$ARGUMENTS
+
+---
+
+## STEP 0 — Parse context
+
+If dispatched from `/validate`, context is in `$ARGUMENTS`. Extract:
+
+- `TARGET_URL` — production URL (FULL) or "none" (LOCAL)
+- `DEPTH` — LOCAL | FULL
+- `MODE` — audit | fix
+- `EXTERNAL` — on | off (FULL-only; LOCAL auto-off)
+- `HTML_FILES` — count or glob
+- `CSS_FILES` — count or glob
+- `FRAMEWORK` — astro | next | vite | svelte | vue | static | other
+- `LOCAL_TOOLS` — detected npm tools (html-validate, stylelint, axe, pa11y)
+
+Standalone invocation (no dispatcher): ask ONCE as a bundled block:
+- LOCAL or FULL ?
+- audit or fix ?
+- URL (if FULL) ?
+
+### Cache directory
+
+```bash
+mkdir -p .validate-cache
+grep -q '^\.validate-cache/' .gitignore 2>/dev/null || \
+ printf '\n# /validate cache\n.validate-cache/\n' >> .gitignore
+```
+
+### Framework detection for SPA built-output targeting
+
+For JS-framework projects (Next, Astro, Vite, SvelteKit, Nuxt),
+HTML validity must target BUILT output, not JSX/TSX source. Detect
+build dir :
+
+```bash
+BUILD_DIR=""
+for d in dist _site build out public .next/server/app; do
+ [ -d "$d" ] && BUILD_DIR="$d" && break
+done
+```
+
+If `BUILD_DIR` is empty and framework is a JS framework, note in
+report : "⚠️ No build output found. Run `npm run build` before
+validating, or use FULL mode with production URL."
+
+---
+
+## STEP 1 — W3C HTML validity
+
+### FULL mode (URL-based)
+
+Nu validator is the W3C-backed HTML checker (validator.w3.org/nu/
+uses it as backend). JSON API :
+
+```bash
+curl -sL --max-time 60 \
+ "https://validator.nu/?out=json&doc=${TARGET_URL}" \
+ > .validate-cache/html-nu.json
+```
+
+Parse :
+```bash
+jq -r '.messages[] | "\(.type)|\(.subType // "")|line:\(.lastLine // "?")|\(.message)"' \
+ .validate-cache/html-nu.json
+```
+
+Classification :
+- `type=error` → **Haute** severity (HTML error)
+- `type=info` + `subType=warning` → **Moyenne** (HTML warning)
+- Other info → ignored
+
+### LOCAL mode (file-based)
+
+Priority order :
+
+**1) `html-validate` npm (preferred — fast, JSON output) :**
+```bash
+if npx --no-install html-validate --version >/dev/null 2>&1; then
+ npx html-validate "**/*.html" --formatter=json \
+ --ignore-path .gitignore 2>&1 > .validate-cache/html-validate.json || true
+fi
+```
+
+**2) `vnu.jar` (W3C official, requires Java) :**
+```bash
+VNU_JAR=""
+for p in /usr/share/vnu/vnu.jar /opt/vnu/vnu.jar ~/.local/lib/vnu.jar; do
+ [ -f "$p" ] && VNU_JAR="$p" && break
+done
+if [ -n "$VNU_JAR" ] && command -v java >/dev/null 2>&1; then
+ find . -name "*.html" -not -path "*/node_modules/*" -not -path "*/.validate-cache/*" -print0 | \
+ xargs -0 java -jar "$VNU_JAR" --format json 2> .validate-cache/html-vnu.json
+fi
+```
+
+**3) Static fallback** (always available) — Use `Grep` + `Read` to
+flag common issues :
+
+- Missing `` on top-level HTML files
+- Missing `` attribute
+- Missing `` in ``
+- Duplicate `id="..."` values within the same file (grep + sort|uniq -d)
+- Multiple `