docs(readme): document Grok Build backbone + navigation TOC

README.md

@@ -34,6 +34,8 @@ Three things set it apart:
 2. **Keyless.** The AI coding agent already on your machine is the backbone. No API keys, no second bill, no gatekeeper.
 3. **Honest about scope.** The [status table](#what-ships-today) marks exactly what's stable, experimental, or roadmap — because red-teaming shouldn't be a priesthood, and it damn sure shouldn't run on vibes.
 
+**Jump to** → [Quick start](#quick-start) · [What it hunts](#what-it-hunts) · [What ships today](#what-ships-today) · [Benchmarks](#benchmarks) · [Architecture](#architecture) · [Docs](#documentation)
+
 ## ⚠️ Authorized use only
 
 T3MP3ST is an **offensive** security tool, built for **authorized** testing, research, and education. Point it **only** at systems you own or have **explicit, written permission** to test. Unauthorized access to computers, networks, or data is illegal in most jurisdictions — **you alone are responsible** for how you use this software and for staying inside the law and your rules of engagement. Bring the storm to *your* targets, not someone else's.
@@ -68,7 +70,8 @@ In the War Room, open **Settings** and connect a local agent (Claude Code / Code
 Prefer to bring a key? Set one and skip the connect step:
 
 ```bash
-export OPENROUTER_API_KEY=...     # or VENICE_API_KEY / ANTHROPIC_API_KEY
+export OPENROUTER_API_KEY=...     # or VENICE_API_KEY / ANTHROPIC_API_KEY / OPENAI_API_KEY
+export XAI_API_KEY=...            # Grok Build (grok-build-0.1) — xAI's coding model, native tool-calling
 ```
 
 Or run it **fully offline** on your own model — no key, no cloud. Defaults to Ollama; point it at any OpenAI-compatible server (LM Studio, vLLM, llama.cpp):