5 replies

LM Studio provider config causes "Cannot read properties of undefined (reading 'trim')"

✅Solved

Adding an LM Studio provider breaks all model responses, including Claude, even when LM Studio is only configured as a fallback.
Environment:
- Clawdbot 2026.1.15
- LM Studio 0.3.39 (Build 2)
- macOS, M4 Max
- Model: meta-llama-3.1-8b-instruct

The issue:
Adding this provider config causes the trim error on ALL requests (Claude included):

"models":{
  "providers":{
    "lm-studio":{
      "baseUrl":"http://localhost:1234/v1",
      "models":[
        {
          "id":"meta-llama-3.1-8b-instruct",
          "name":"Llama 3.1 8B",
          "reasoning":false,
          "input":["text"],
          "cost":{"input":0,"output":0,"cacheRead":0,"cacheWrite":0},
          "contextWindow":131072,
          "maxTokens":8192
        }
      ]
    }
  }
}

"models":{
  "providers":{
    "lm-studio":{
      "baseUrl":"http://localhost:1234/v1",
      "models":[
        {
          "id":"meta-llama-3.1-8b-instruct",
          "name":"Llama 3.1 8B",
          "reasoning":false,
          "input":["text"],
          "cost":{"input":0,"output":0,"cacheRead":0,"cacheWrite":0},
          "contextWindow":131072,
          "maxTokens":8192
        }
      ]
    }
  }
}

Confirmed working:
- LM Studio responds correctly to direct curl requests (curl http://localhost:1234/v1/chat/completions)
- Removing the lm-studio provider entirely → Claude works fine

Tried:
- Clearing ~/.clawdbot/agents/*/agent/models.json
- Adding "apiType": "openai"
- Daemon restarts

Seems like the provider config itself is breaking something during initialization, not just when the model is called. What's the correct way to configure LM Studio?

(note: claude code wrote this for me

)

Solution

The root cause is in the

pi-coding-agent

pi-coding-agent

library (used by Clawdbot). When you define custom models in

models.json

models.json

, the library's

ModelRegistry.validateConfig()

ModelRegistry.validateConfig()

function requires:

1. apiKey
apiKey
- Must be present when defining custom models (this is a hard requirement)
2. baseUrl
baseUrl
- Required when defining custom models
3. api
api
- Should specify the API type (e.g.,

openai-completions

openai-completions

)

The "Cannot read properties of undefined (reading 'trim')" error likely occurs because:
- The library tries to process the incomplete config
- Without an

apiKey

apiKey

, some internal validation or processing path fails when trying to call

.trim()

.trim()

on an undefined value

Alternative: Override-only config

If you just want to override the base URL for a built-in provider without defining custom models, use this simpler format:

"models": {

"models": {

Jump to solution

FotC�

Friends of the Crustacean 🦞🤝•2mo ago•

5 replies

Nathan Gross

LM Studio provider config causes "Cannot read properties of undefined (reading 'trim')"

✅Solved

"models":{
  "providers":{
    "lm-studio":{
      "baseUrl":"http://localhost:1234/v1",
      "models":[
        {
          "id":"meta-llama-3.1-8b-instruct",
          "name":"Llama 3.1 8B",
          "reasoning":false,
          "input":["text"],
          "cost":{"input":0,"output":0,"cacheRead":0,"cacheWrite":0},
          "contextWindow":131072,
          "maxTokens":8192
        }
      ]
    }
  }
}

"models":{
  "providers":{
    "lm-studio":{
      "baseUrl":"http://localhost:1234/v1",
      "models":[
        {
          "id":"meta-llama-3.1-8b-instruct",
          "name":"Llama 3.1 8B",
          "reasoning":false,
          "input":["text"],
          "cost":{"input":0,"output":0,"cacheRead":0,"cacheWrite":0},
          "contextWindow":131072,
          "maxTokens":8192
        }
      ]
    }
  }
}

)

Solution

The root cause is in the

pi-coding-agent

pi-coding-agent

library (used by Clawdbot). When you define custom models in

models.json

models.json

, the library's

ModelRegistry.validateConfig()

ModelRegistry.validateConfig()

openai-completions

openai-completions

)

The "Cannot read properties of undefined (reading 'trim')" error likely occurs because:
- The library tries to process the incomplete config
- Without an

apiKey

apiKey

, some internal validation or processing path fails when trying to call

.trim()

.trim()

on an undefined value

Alternative: Override-only config

If you just want to override the base URL for a built-in provider without defining custom models, use this simpler format:

"models": {

"models": {

Jump to solution

LM Studio provider config causes "Cannot read properties of undefined (reading 'trim')"

LM Studio provider config causes "Cannot read properties of undefined (reading 'trim')"

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