ollama tool calling issues

┃ # New session - 2025-10-08T06:46:14.387Z ┃
┃ /share to create a shareable link 3.2K/0% ┃

┃ ┃
┃ hello ┃
┃ skybu (08:46 AM) ┃
┃ ┃

 Hey there! How can I help you today?
 Build gpt-oss:20b (08:46 AM)

┃ ┃
┃ write "hello world" to test.txt ┃
┃ skybu (08:46 AM) ┃
┃ ┃

┃ ┃
┃ Repo_browser.read_file ┃
┃ ┃
┃ The arguments provided to the tool are invalid: Model tried to call unavailable tool 'repo_browser.read_file'. Available tools: ┃
┃ invalid, bash, edit, webfetch, glob, grep, list, read, write, todowrite, todoread, task. ┃
┃ ┃

┃ ┃
┃ Assistant ┃
┃ ┃
┃ The arguments provided to the tool are invalid: Model tried to call unavailable tool 'assistant'. Available tools: invalid, bash, ┃
┃ edit, webfetch, glob, grep, list, read, write, todowrite, todoread, task. ┃
┃ ┃

┃ ┃
┃ List %!s(float64=2) (path=) ┃
┃ ┃
┃ G:\Junk\testopencode/ ┃
┃ ┃
┃ ┃

┃ ┃
┃ Assistant ┃
┃ ┃
┃ The arguments provided to the tool are invalid: Model tried to call unavailable tool 'assistant'. Available tools: invalid, bash, ┃
┃ edit, webfetch, glob, grep, list, read, write, todowrite, todoread, task. ┃
┃ ┃

┃ ┃
┃ Task ┃
┃ ┃
┃ ┃
Hey! I’m not sure what you’re trying to do. Could you let me know the details or what you’d like me to work on?
Build gpt-oss:20b (08:47 AM)


{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "ollama": {
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "http://localhost:11434/v1"
      },
      "models": {
        "granite4:micro": { "tools": true },
        "gpt-oss:20b": { "tools": true },
        "QWEN14B40KContextWindow:latest": { "tools": true },
        "gemma3:4b": { "tools": true },
        "AI0002:latest": { "tools": true },
        "AI0001:latest": { "tools": true },
        "qwen3:1.7b": { "tools": true },
        "qwen3:14b": { "tools": true },
        "gemma3:12b": { "tools": true },
        "hf.co/bartowski/mistralai_Devstral-Small-2505-GGUF:IQ2_M": { "tools": true },
        "hf.co/bartowski/mistralai_Devstral-Small-2505-GGUF:IQ3_M": { "tools": true },
        "devstral-q3kl:latest": { "tools": true },
        "nomic-embed-text:v1.5": { "tools": true },
        "devstral:latest": { "tools": true },
        "JollyLlama/GLM-4-32B-0414-Q4_K_M:latest": { "tools": true },
        "gemma3:12b-it-qat": { "tools": true },
        "cogito:14b": { "tools": true },
        "deepcoder:latest": { "tools": true },
        "deepseek-r1:671b": { "tools": true },
        "deepseek-r1:1.5b": { "tools": true },
        "deepseek-r1:70b": { "tools": true },
        "deepseek-r1:14b": { "tools": true },
        "deepseek-r1:8b": { "tools": true },
        "deepseek-r1:7b": { "tools": true },
        "deepseek-r1:32b": { "tools": true },
        "llama3.3:latest": { "tools": true },
        "nemotron:latest": { "tools": true },
        "deepseek-coder-v2:16b": { "tools": true },
        "granite3-dense:8b": { "tools": true },
        "starcoder2:15b": { "tools": true },
        "codellama:code": { "tools": true },
        "codellama:latest": { "tools": true },
        "qwen2.5:7b": { "tools": true },
        "gemma2:27b": { "tools": true },
        "phi3:14b": { "tools": true },
        "llama3.2:latest": { "tools": true },
        "llama3.1:latest": { "tools": true },
        "reflection:latest": { "tools": true },
        "codellama:7b-code": { "tools": true }
      }
    }
  }
}

Tried simple version too:

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "ollama": {
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "http://localhost:11434/v1"
      },
      "models": {
        "granite4:micro": {
          "tools": true
        },
        "gpt-oss:20b": {
          "tools": true
        }
      }
    }
  }
}

This issue might be a duplicate of existing issues. Please check:

not being able to write files when using local models #590: Similar issue with write tool not working when using local models (Ollama) - the model returns JSON tool calls but files are not actually written
opencode stucks while trying to write a file #2144: OpenCode hangs/times out when trying to write files with local models
Tool Calling Issues with Open Source Models in OpenCode #234: General tool calling issues with open source models, including problems with tool name capitalization and execution failures
Constant failures to use the Write / Edit tools #1357: Constant failures to use Write/Edit tools with various models, showing invalid tool input errors
AI_InvalidToolInputError: Invalid input for tool write #1498: Invalid input for tool write errors with missing required parameters

Your issue appears to be related to the common problem of write tool functionality not working properly with local/Ollama models in build mode. The JSON tool call output you're seeing suggests the model is generating tool calls but OpenCode isn't executing them properly.

Feel free to ignore if none of these address your specific case.

To reproduce:

Step 1:

ollama list

Step 2:

exit ollama via system tray

step3:

ollama serve

step 4:
ollama run
step 5:
opencode
step 6:
/models

Make sure to setup
config.json
ollama settings in environment variables and settings.

yes
cmd1.exe: ollama list
cmd2.exe ollama serve
cmd3.exe ollama run qwen3etc
cmd4.exe opencode
opencode interacts with ollama http

┃ ┃
┃ write "Hello World" to a textfile called: test.txt in the current folder ┃
┃ skybu (09:32 AM) ┃
┃ ┃

 Okay, the user wants me to write "Hello World" to a text file named test.txt in the current folder. Let me think about how to
 approach this.
 First, I need to check if the current directory is correct. The user mentioned the current folder, so I should make sure that the
 file will be created there. Since the environment is a Windows system (win32), I need to ensure that the path is handled
 correctly, but since it's the current directory, it should be straightforward.

 Next, I should use the write function. The parameters required are filePath and content. The filePath should be "test.txt" in the
 current directory. The content is "Hello World".

 Wait, but the write function requires an absolute path. The current working directory is G:\Junk\testopencode. So the absolute
 path would be G:\Junk\testopencode\test.txt. I need to make sure to use that.

 But the user might not have specified the full path, but since the instruction is to write in the current folder, I can construct
 the absolute path based on the working directory provided in the environment. The working directory is G:\Junk\testopencode, so
 the file path should be G:\Junk\testopencode\test.txt.

 I should use the write function with filePath set to that absolute path and content as "Hello World".

 I need to make sure there's no existing file named test.txt that might cause an overwrite, but the user didn't mention any
 concerns about that, so proceed as instructed.

 So the correct tool call is to use the write function with the absolute file path and the content provided.

┃ ┃
┃ Write G:\Junk\testopencode\test.txt
Okay, the user asked to write "Hello World" to a file called test.txt in the current folder. I need to use the write tool for this.
Let me check the parameters required for the write function. The filePath must be an absolute path. The current working directory
is G:\Junk\testopencode, so the file path should be G:\Junk\testopencode\test.txt. The content is "Hello World". I should make
sure to use the correct parameters. No other tools are needed here since it's a straightforward write operation. Let me construct
the tool call accordingly. Build QWEN14B40KContextWindow:latest (09:35 AM)

I made this model a while ago:

QWEN14B40KContextWindow:latest

Increase it's context window... I used it today and it worked !

I am not sure how I created this model, but maybe this link will help:

https://github.com/p-lemonish/ollama-x-opencode

Maybe ollama now has a new feature to increase context windows without creating new models ?!

@SkybuckFlying

@SkybuckFlying this is an ollama configuration issue not opencode, either the model is too dumb or it doesn't have enough context.

I can point you in direction of resources for that but this: https://github.com/p-lemonish/ollama-x-opencode generally solved it for most people I've talked with

this issue may be useful: #2362

closing since this isn't an opencode issue, If you need more help getting your ollama setup for agentic development let me know

@SkybuckFlying this is an ollama configuration issue not opencode, either the model is too dumb or it doesn't have enough context.

I can point you in direction of resources for that but this: https://github.com/p-lemonish/ollama-x-opencode generally solved it for most people I've talked with

Thank you! this was very helpful and got me off the ground with tool calling

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ollama tool calling issues #3029

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