feat: Auto-detect text browsers and serve plain text CV

- Detect curl, wget, lynx, w3m, links, elinks, browsh, carbonyl
- Check User-Agent and Accept: text/plain header
- Redirect to /text endpoint automatically
- Document in SEO guide and modern techniques

doc/15-SEO.md

@@ -163,6 +163,42 @@ description: Interactive curriculum vitae...
 
 **Purpose:** Provides AI systems (ChatGPT, Claude, Perplexity, etc.) with structured, human-readable information about the site content.
 
+#### Plain Text Auto-Detection (`/text` endpoint)
+
+The site automatically detects text-based browsers and CLI tools, serving a clean 80-character plain text version:
+
+**Auto-detected clients:**
+| Client | Type |
+|--------|------|
+| curl | CLI tool |
+| wget | CLI tool |
+| HTTPie | CLI tool |
+| Lynx | Text browser |
+| w3m | Text browser |
+| Links/ELinks | Text browser |
+| Browsh | Terminal browser |
+| Carbonyl | Terminal browser |
+
+**Usage:**
+```bash
+# Auto-detected (serves plain text):
+curl https://juan.andres.morenorub.io/
+
+# Explicit endpoint:
+curl https://juan.andres.morenorub.io/text?lang=en
+
+# With Accept header:
+curl -H "Accept: text/plain" https://juan.andres.morenorub.io/
+```
+
+**Output features:**
+- 80-character line wrapping
+- ASCII art section headers
+- Clean, structured text
+- All CV content preserved
+
+---
+
 #### robots.txt AI Bot Rules (`static/robots.txt`)
 
 Explicit permissions for AI crawlers:
@@ -223,6 +259,8 @@ The implementation supports Google's E-E-A-T (Experience, Expertise, Authority,
 | `static/sitemap.xml` | XML sitemap for search engines |
 | `data/cv-en.json` | SEO fields (pageTitle, metaTitle, etc.) |
 | `data/cv-es.json` | Spanish SEO fields |
+| `/text` endpoint | Plain text CV for CLI/TUI browsers |
+| `templates/cv-text.txt` | Plain text template |
 
 ---
 

doc/2-MODERN-WEB-TECHNIQUES.md

@@ -3532,6 +3532,55 @@ Allow: /
 | **Authority** | Social links (LinkedIn, GitHub), company associations |
 | **Trust** | HTTPS, canonical URLs, clear contact info, privacy-respecting analytics |
 
+#### 14. Plain Text Version for CLI/TUI Browsers
+
+**Implementation:** Auto-detect text-based browsers and serve clean plain text.
+
+```go
+// Text-based browsers that get plain text automatically
+var textBrowsers = []string{
+    "curl", "wget", "httpie",
+    "lynx", "w3m", "links", "elinks",
+    "browsh", "carbonyl",
+}
+
+func isTextBrowser(r *http.Request) bool {
+    ua := strings.ToLower(r.Header.Get("User-Agent"))
+    for _, browser := range textBrowsers {
+        if strings.Contains(ua, browser) {
+            return true
+        }
+    }
+    // Also check Accept: text/plain header
+    return strings.HasPrefix(r.Header.Get("Accept"), "text/plain")
+}
+```
+
+**Usage:**
+```bash
+# These automatically get plain text:
+curl https://example.com/           # Detects curl User-Agent
+wget -qO- https://example.com/      # Detects wget User-Agent
+lynx https://example.com/           # Text browser gets text version
+
+# Explicit plain text endpoint:
+curl https://example.com/text?lang=en
+```
+
+**Features:**
+- 80-character line wrapping for terminal readability
+- Centered section titles with ASCII art separators
+- Clean, structured output (no HTML/CSS/JS)
+- Preserves all CV content: experience, skills, projects, etc.
+
+**Benefits:**
+- ✅ **CLI-friendly:** `curl example.com` just works
+- ✅ **AI-accessible:** Easy parsing for LLMs and crawlers
+- ✅ **Accessibility:** Works in any terminal environment
+- ✅ **No dependencies:** Pure text, no rendering required
+
+---
+
 ### SEO Files Overview
 
 | File | Purpose |
@@ -3541,6 +3590,7 @@ Allow: /
 | `static/llms.txt` | AI crawler information file |
 | `static/sitemap.xml` | XML sitemap |
 | `data/cv-{lang}.json` | SEO fields per language |
+| `/text` endpoint | Plain text CV for CLI/TUI browsers |
 
 ### Validation
 

internal/handlers/cv_pages.go

@@ -25,6 +25,12 @@ func (h *CVHandler) Home(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// Detect text-based browsers and serve plain text version
+	if isTextBrowser(r) {
+		h.PlainText(w, r)
+		return
+	}
+
 	// Get language from query parameter, default to English
 	lang := r.URL.Query().Get("lang")
 	if lang == "" {

internal/handlers/cv_text.go

@@ -10,6 +10,42 @@ import (
 	"text/template"
 )
 
+// Text-based browsers and CLI tools that should get plain text
+var textBrowsers = []string{
+	"curl",
+	"wget",
+	"httpie",
+	"lynx",
+	"w3m",
+	"links",
+	"elinks",
+	"browsh",
+	"carbonyl",
+	"netrik",
+	"retawq",
+	"surfraw",
+}
+
+// isTextBrowser detects if the request comes from a text-based browser or CLI tool
+func isTextBrowser(r *http.Request) bool {
+	ua := strings.ToLower(r.Header.Get("User-Agent"))
+
+	// Check for known text browsers
+	for _, browser := range textBrowsers {
+		if strings.Contains(ua, browser) {
+			return true
+		}
+	}
+
+	// Check Accept header - if client prefers text/plain
+	accept := r.Header.Get("Accept")
+	if strings.HasPrefix(accept, "text/plain") {
+		return true
+	}
+
+	return false
+}
+
 // ==============================================================================
 // PLAIN TEXT HANDLER
 // Renders CV as clean plain text for terminal/AI consumption