feature: add Tetrate Agent Router Service (TARS) as provider

docs/providers/tars.md

@@ -0,0 +1,62 @@
+---
+description: Configure Tetrate Agent Router Service (TARS) in Roo Code to access LLMs from multiple providers with configurable fallback and built-in observability.
+keywords:
+  - roo code
+  - tetrate agent router service
+  - tetrate
+  - tars
+  - ai provider
+  - language models
+  - model configuration
+  - cost visibility
+  - usage tracking
+sidebar_label: Tetrate Agent Router Service
+image: /img/social-share.jpg
+---
+
+# Using Tetrate Agent Router Service (TARS) With Roo Code
+
+Roo Code supports accessing models through the [Tetrate Agent Router Service (TARS)](https://tetrate.io/products/tetrate-agent-router-service), a managed LLM routing service that provides configurable fallback and traffic shifting, and cost visibility without infrastructure overhead.
+
+**Website:** [https://router.tetrate.ai](https://router.tetrate.ai)  
+**API Endpoint:** `https://api.router.tetrate.ai/v1`
+
+---
+
+## Getting an API Key
+
+1.  **Sign Up/Sign In:** Go to the [TARS website](https://router.tetrate.ai) and create an account using Google or GitHub OAuth.
+2.  **Get API Key:** Generate your API key from the TARS dashboard after signing in.
+3.  **Free Credit:** New signups with business email addresses receive a $5 free credit to get started.
+
+---
+
+## Supported Models
+
+TARS provides access to models from multiple providers through a unified API. Roo Code will automatically fetch the latest list of available models. TARS supports configurable fallback and traffic shifting between models based on availability, cost, or performance preferences.
+
+---
+
+## Configuration in Roo Code
+
+1.  **Open Roo Code Settings:** Click the gear icon (<Codicon name="gear" />) in the Roo Code panel.
+2.  **Select Provider:** Choose "Tetrate Agent Router Service" from the "API Provider" dropdown.
+3.  **Enter API Key:** Paste your TARS API key into the "TARS API Key" field.
+4.  **Select Model:** Choose your desired model from the "Model" dropdown.
+
+---
+
+## Tips and Notes
+
+- **Unified Entry Point:** Single endpoint simplifies code and key management across multiple providers.
+- **Cost Visibility:** Pay-as-you-go pricing with comprehensive cost tracking and optimization strategies.
+- **Observability:** Detailed dashboards for monitoring usage, costs, response times, and model performance.
+- **Automatic Fallback:** Built-in resiliency with automatic model switching when providers are unavailable.
+- **A/B Testing:** Compare model performance side-by-side in the integrated playground.
+
+---
+
+## Relevant Resources
+
+- [TARS Product Page](https://tetrate.io/products/tetrate-agent-router-service)
+- [TARS Slack Community](https://join.slack.com/t/tetrate-agent-router/shared_invite/zt-399tv7hjm-6YMXztGywTOQrMIolvEBNg)

sidebars.ts

@@ -177,6 +177,7 @@ const sidebars: SidebarsConfig = {
         'providers/openrouter',
         'providers/requesty',
         'providers/sambanova',
+        'providers/tars',
         'providers/unbound',
         'providers/vertex',
         'providers/vscode-lm',