Refresh README with example image

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: EricCogen

README.md

@@ -37,6 +37,8 @@ Code gets simpler. Nothing else changes.
 
 Now concurrent requests can corrupt shared state.
 
+![GauntletCI example](./gauntletci-example.png)
+
 ---
 
 ## Looks equivalent, changes runtime behavior
@@ -99,6 +101,21 @@ GauntletCI evaluates staged or full diffs and returns:
 
 ---
 
+# What the model is used for
+
+The model is used to:
+
+- interpret diffs in context
+- reason about behavioral impact
+- explain why a change may be risky
+- suggest validation steps
+
+It does not generate code.
+
+It is used as a reasoning layer on top of deterministic rule detection.
+
+---
+
 # What this is
 
 A diff-first system that surfaces behavior changes that are likely not fully validated.
@@ -127,16 +144,62 @@ dotnet tool install -g GauntletCI
 
 # Quickstart
 
-1. Configure `.gauntletci.json`
+GauntletCI needs minimal configuration to understand:
+
+- how to run your tests
+- which rules should block a commit
+- which model (remote or local) to use for analysis
+
+Works with local models for offline or cost-controlled usage.
+
+1. Create or edit `.gauntletci.json`:
+
+```json
+{
+  "test_command": "dotnet test",
+  "disabled_rules": [],
+  "blocking_rules": ["GCI012", "GCI004"],
+  "telemetry": true,
+  "model": "claude-sonnet-4-6"
+}
+```
 
-2. Set API key
+2. Configure a model provider
+
+Supported:
+
+- Hosted models (Anthropic, OpenAI, compatible APIs)
+- Local models (Ollama or any OpenAI-compatible endpoint)
+
+Example (Anthropic):
+
+set ANTHROPIC_API_KEY=your_key_here
+
+Example (Ollama):
+
+- Install Ollama: https://ollama.com
+- Run a model locally:
+  ollama run llama3
+- Configure endpoint in your environment or config
 
 3. Run:
 
 gauntletci
 
+Optional:
+
+gauntletci --full  
+gauntletci --rule GCI012  
+gauntletci --format json  
+
 ---
 
 # License
 
-Elastic License 2.0 (ELv2)
+GauntletCI is source-available under the Elastic License 2.0 (ELv2).
+
+This means you can use, modify, and distribute the source freely except:
+
+- You may not offer GauntletCI as a managed service or SaaS product.
+
+If you are building an internal tool or using the CLI directly, ELv2 places no restrictions on you.