opencode-crs-bedrock

OpenCode plugin for FeedMob CRS (Claude Relay Service) proxy to AWS Bedrock Anthropic models.

Features

• URL Rewriting - Routes requests to the CRS endpoint
• API Key Auth - Uses x-api-key header for authentication

Installation

npm install -g opencode-crs-bedrock

Or add to your OpenCode config to auto-install:

{
  "plugin": ["opencode-crs-bedrock@latest"]
}

Quick Start

Step 1: Configure OpenCode

Create or edit opencode.json in your project root or ~/.config/opencode/opencode.json:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": [
    "opencode-crs-bedrock@latest"
  ],
  "provider": {
    "crs": {
      "npm": "@ai-sdk/anthropic",
      "models": {
        "claude-opus-4-5": {
          "name": "Opus 4.5 [CRS]",
          "limit": { "context": 200000, "output": 64000 },
          "modalities": { "input": ["text", "image", "pdf"], "output": ["text"] },
          "variants": {
            "low": { "thinkingConfig": { "thinkingBudget": 8192 } },
            "max": { "thinkingConfig": { "thinkingBudget": 32768 } }
          }
        },
        "claude-sonnet-4-5": {
          "name": "Sonnet 4.5 [CRS]",
          "modalities": { "input": ["text", "image", "pdf"], "output": ["text"] },
          "variants": {
            "low": { "thinkingConfig": { "thinkingBudget": 8192 } },
            "max": { "thinkingConfig": { "thinkingBudget": 32768 } }
          }
        }
      }
    }
  }
}

Step 2: Authenticate

Run the OpenCode auth login command:

opencode auth login

When prompted:

1. Select Other provider
2. Enter provider id: crs
3. Enter your CRS API key (starts with cr_)

Your credentials will be securely stored and the plugin will automatically configure the custom fetch handler for CRS authentication.

Usage

# Interactive mode
opencode

# Or direct run with a specific model
opencode run -m crs/claude-sonnet-4-5 "Hello, world!"

# Use with thinking budget variants
opencode run -m crs/claude-opus-4-5:low "Simple task"   # 8K thinking tokens
opencode run -m crs/claude-opus-4-5:max "Complex task"  # 32K thinking tokens

Model Configuration

Context Limits

• Opus 4.5: 200K context, 64K output tokens
• Sonnet 4.5: Default limits (inherited from SDK)

Extended Thinking

Both models support extended thinking with configurable budgets via variants:

• :low - 8,192 thinking tokens for simpler tasks
• :max - 32,768 thinking tokens for complex reasoning

Use variants by appending :variant to the model ID (e.g., crs/claude-opus-4-5:max).

Modalities

All models support:

• Input: text, images, PDF documents
• Output: text

Debugging

Enable debug logging to see request details:

CRS_DEBUG=true opencode

Troubleshooting

Authentication Issues

Check stored credentials:

opencode auth list

If your CRS credentials aren't listed, run the authentication step again:

opencode auth login

Make sure to:

• Select Other provider
• Enter provider id: crs
• Enter your CRS API key (starts with cr_)

Connection Issues

1. Verify your credentials are stored:

   opencode auth list

2. Check your opencode.json has the correct provider configuration (see Quick Start above)

3. Enable debug logging to see request details:

   CRS_DEBUG=true opencode run -m crs/claude-sonnet-4-5 "test"

Local Development

For contributors working on the plugin itself:

{
  "plugin": [
    "file:///path/to/opencode-crs-bedrock"
  ]
}

Reference the local directory in your OpenCode config for live development.

License

MIT