symbiont skill: document Dendrite integration

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

symbiont/SKILL.md

@@ -168,6 +168,46 @@ tail -5 /data/symbiont/heartbeat.jsonl | python3 -m json.tool
 
 ---
 
+## Dendrite Integration
+
+Symbiont has web perception via **Dendrite**, a headless Chromium browser running on cortex as a Docker service.
+
+### Quick access from Symbiont code
+
+```python
+from symbiont.web import fetch_page, take_screenshot, search_web
+
+# Fetch and read a webpage
+page = fetch_page("https://example.com")
+print(page['title'], page['content'][:200])
+
+# Screenshot for visual verification  
+png = take_screenshot("https://example.com")
+
+# Multi-step: search and read results
+results = search_web("best python async frameworks 2026")
+```
+
+### Dendrite endpoints (from cortex localhost or public URL)
+| Endpoint | What it does |
+|----------|-------------|
+| `POST /fetch` | Fetch URL → markdown/text/html (full JS rendering) |
+| `POST /screenshot` | Take screenshot → PNG bytes |
+| `POST /execute` | Run JavaScript in page context |
+| `POST /interact` | Click, type, scroll in a session |
+| `POST /session` | Create persistent browser session |
+| `GET /health` | Health check (no auth needed) |
+
+### Connection details
+- **Public URL**: `https://browser.hydrascale.net`
+- **Internal**: `http://localhost:3000` (from cortex)
+- **API Key**: `8dc5e8f7a02745ee8db90c94b2481fd9e1deeea1e2ce74420f54047859ea7edf`
+- **Auth**: `X-API-Key` header on all endpoints except `/health`
+
+For full Dendrite documentation, load the `dendrite` skill.
+
+---
+
 ## API Endpoints
 
 ### `POST /task`