Merge NeuroSploit v3.3.0 — Autonomous MD-Agent Engine into main

# Conflicts:
#	prompts/task_library.json

.env.example

@@ -20,6 +20,13 @@ GEMINI_API_KEY=
 # OpenRouter (multi-model): https://openrouter.ai/keys
 OPENROUTER_API_KEY=
 
+# xAI Grok: https://console.x.ai/  (used by the Grok CLI backend)
+XAI_API_KEY=
+
+# NVIDIA NIM (PR #28): https://build.nvidia.com/  — keys look like `nvapi-...`
+# OpenAI-compatible endpoint at https://integrate.api.nvidia.com/v1
+NVIDIA_NIM_API_KEY=
+
 # Together AI: https://api.together.xyz/settings/api-keys
 TOGETHER_API_KEY=
 
@@ -161,3 +168,21 @@ DATABASE_URL=sqlite+aiosqlite:///./data/neurosploit.db
 HOST=0.0.0.0
 PORT=8000
 DEBUG=false
+
+# =============================================================================
+# NeuroSploit v3.3.0 — Autonomous MD-Agent Engine
+# =============================================================================
+# The engine delegates execution to a locally-installed agentic CLI backend.
+# Default backend (claude | codex | grok). First installed is used if unset.
+NEUROSPLOIT_BACKEND=claude
+# Default provider/model (see neurosploit_agent/models.py)
+NEUROSPLOIT_PROVIDER=anthropic
+NEUROSPLOIT_MODEL=claude-opus-4-8
+# OOB collaborator host for blind/SSRF/XXE proof (optional)
+NEUROSPLOIT_COLLABORATOR=
+# Reinforcement-learning loop (1=on). State persists to data/rl_state.json
+NEUROSPLOIT_RL=1
+# Playwright MCP for browser-based proof of execution (1=on; needs npx)
+NEUROSPLOIT_MCP=1
+# OpenAI-compatible base URL override (set automatically per provider)
+#OPENAI_BASE_URL=