Add LM Studio support and generalize OpenAI client

README.md

@@ -18,15 +18,15 @@ It can summarize diffs, ask you how each file relates to the purpose of the comm
 
 - **Interactive “ask” mode** – Classify each file as main, supporting, or consequential.
 - **Quick mode** – Instantly summarize staged diffs into a commit message.
-- **LLM-powered** – Uses OpenAI’s GPT models to generate concise and structured messages.
+- **LLM-powered** – Uses OpenAI, or a local model via [Ollama](#providers) or [LM Studio](#providers).
 - **Configurable** – Choose models, tweak behavior, and set defaults in a config file.
 - **Pull request summaries** – Generate clean, readable PR descriptions from your commit history.
 
 ---
 
 ## Installation
 
-You’ll need an OpenAI API key set as an environment variable:
+To use OpenAI (the default provider) you’ll need an API key set as an environment variable:
 
 ```bash
 export OPENAI_API_KEY="sk-..."
@@ -126,6 +126,25 @@ model = "gpt-5-nano"
 
 ---
 
+## Providers
+
+Set `provider` to choose a backend. Any of them can be overridden per repository.
+
+| Provider   | Default `url`            | API key  |
+|------------|--------------------------|----------|
+| `openai`   | `https://api.openai.com` | required |
+| `ollama`   | `http://localhost:11434` | not used |
+| `lmstudio` | `http://localhost:1234`  | optional |
+
+```toml
+[default]
+provider = "lmstudio"
+model = "qwen/qwen3-coder-30b"
+url = "http://192.168.1.16:1234/v1"
+```
+
+---
+
 ## Roadmap
 
 - [x] Support for local/offline LLMs (Ollama, LM Studio).

commitbot.toml

@@ -7,21 +7,28 @@ model = "gpt-5-nano"
 # Optional: OpenAI-style API key (falls back to env OPENAI_API_KEY)
 openai_api_key = "your api key here"
 
-# Optional: provider base URL (e.g. http://localhost:11434 for Ollama)
+# Optional: provider base URL (e.g. http://localhost:11434 for local LLM)
 url = "https://api.openai.com"
 
 # 1 = fully serial, >1 = parallel API calls
 max_concurrent_requests = 4
 
 
-["mikegarde/commitbot"]
+["company/repo"]
 provider = "openai"
 stream = false
 model = "gpt-4o-mini"
 openai_api_key = "alternative for spend identification"
 max_concurrent_requests = 8
 
 
+["MikeGarde/commitbot"]
+provider = "lmstudio"
+model = "google/gemma-4-12b-qat"
+url = "http://GPU.localdomain:1234/v1"
+max_concurrent_requests = 2
+
+
 ["company/enterprise"]
 # Enterprise / self-hosted style config
 base_url = "https://enterprise.api.endpoint"

src/cli_args.rs

@@ -28,7 +28,7 @@ pub struct Cli {
     #[arg(short = 'k', long, global = true)]
     pub api_key: Option<String>,
 
-    /// LLM provider / API style (openai or ollama)
+    /// LLM provider / API style (openai, ollama, or lmstudio)
     #[arg(long, global = true)]
     pub provider: Option<String>,
 

src/config.rs

@@ -10,7 +10,7 @@ use std::path::{Path, PathBuf};
 /// Final resolved configuration for commitbot.
 #[derive(Debug, Clone)]
 pub struct Config {
-    /// LLM provider (openai, ollama)
+    /// LLM provider (openai, ollama, lmstudio)
     pub provider: String,
     /// OpenAI API key for authentication (sensitive – redacted in logs)
     pub openai_api_key: Option<String>,
@@ -55,13 +55,16 @@ impl Config {
 
         let max_concurrent_requests = r.get_usize("max_concurrent_requests", 4);
         let stream = r.get_bool("stream", true);
-        let request_timeout_secs = r.get_u64("request_timeout_secs", 90);
+        let request_timeout_secs = r.get_u64("request_timeout_secs", 300);
 
         // Cleanup: trim stray quotes if any upstream included them
         let provider = provider.trim_matches('"').to_string();
         let model = model.trim_matches('"').to_string();
         let openai_api_key = openai_api_key.map(|s| s.trim_matches('"').to_string());
-        let base_url = base_url.map(|s| s.trim_matches('"').to_string());
+        // A blank url is the same as no url
+        let base_url = base_url
+            .map(|s| s.trim_matches('"').trim().to_string())
+            .filter(|s| !s.is_empty());
 
         if provider == "openai" && openai_api_key.is_none() {
             return Err(anyhow!(