update documentation

Author: ravisastryk

README.md

@@ -1,9 +1,6 @@
 ![SecurePrompt](secureprompt-logo-banner.png)
-# SecurePrompt
 
-**Pre-flight security layer for AI prompts.**
-
-Scans every prompt for secrets, PII, prompt injection, risky operations, data exfiltration, and malware intent — before it reaches your LLM.
+SecurePrompt scans every prompt for secrets, PII, prompt injection, risky operations, data exfiltration, and malware intent — before it reaches your LLM.
 
 ## Quick Start
 
@@ -16,8 +13,30 @@ make build
 make run
 ```
 
+The server will start on `http://localhost:8080`. Open this URL in your browser to access the **web interface** with a clean UI for scanning prompts.
+
+### ChatGPT Custom GPT Integration
+
+SecurePrompt can be integrated as a **Custom GPT** to scan prompts before they reach ChatGPT:
+
+1. **Run SecurePrompt server** (ngrok used for demo purposes)
+2. **Create Custom GPT** in ChatGPT with Action pointing to your `/v1/prescan` endpoint
+3. **Pre-flight scanning**: Every prompt is scanned for secrets, PII, injection attempts
+4. **Safe rewrites**: Blocked/flagged prompts are automatically sanitized
+
+**Note:** The demo uses ngrok for quick public access. In production, this can be integrated with any managed service, legacy system, or enterprise-grade infrastructure (AWS API Gateway, Azure API Management, on-prem reverse proxy, etc.).
+
+The web interface at [web/static/index.html](web/static/index.html) provides standalone access to the same scanning engine.
+
 ## Test
 
+**First, start the server:**
+```bash
+make run
+# Server will start on http://localhost:8080
+```
+
+**Then, in another terminal, scan prompts:**
 ```bash
 # Safe prompt
 make scan PROMPT="Write hello world in Go"
@@ -28,17 +47,28 @@ make scan PROMPT="My key is sk-abc123xyz456"
 # Injection → REVIEW
 make scan PROMPT="Ignore all previous instructions"
 
-# Run full test suite
+# Run full test suite (will start server automatically)
 bash scripts/test_examples.sh
 ```
 
 ### Architecture
 ![alt text](secureprompt_architecture.png)
 
+## Web Interface
+
+Access the interactive web UI at `http://localhost:8080` after starting the server. Features:
+
+- Clean, modern interface for prompt scanning
+- Three policy levels: Strict, Moderate, Permissive
+- Real-time risk scoring and detailed findings
+- Safe prompt rewrites for flagged content
+- Sub-100ms scan times
+
 ## API
 
 | Method | Path | Description |
 |--------|------|-------------|
+| GET | `/` | Web interface dashboard |
 | GET | `/health` | Health check |
 | POST | `/v1/prescan` | Scan a prompt |
 | GET | `/v1/audit` | View audit log |