Rodin
8d53b649ee
- Composite action: cache to runner.temp instead of /usr/local/bin (avoids permission issues on runners) - Document that temperature=0 means server default (omitted from request) - Note: strconv import already exists (false positive from GPT-5)
111 lines
2.6 KiB
Go
111 lines
2.6 KiB
Go
package llm
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"strings"
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)
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// Client calls an OpenAI-compatible chat completion API.
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type Client struct {
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BaseURL string
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APIKey string
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Model string
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Temperature float64
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HTTP *http.Client
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}
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// NewClient creates a new LLM client.
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func NewClient(baseURL, apiKey, model string) *Client {
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return &Client{
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BaseURL: strings.TrimRight(baseURL, "/"),
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APIKey: apiKey,
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Model: model,
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HTTP: &http.Client{},
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}
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}
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// WithTemperature sets the temperature for LLM requests.
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// A value of 0 (the zero value) means the field is omitted from the request,
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// causing the server to use its default temperature.
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// If not set (zero value), the server default is used.
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func (c *Client) WithTemperature(t float64) *Client {
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c.Temperature = t
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return c
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}
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// Message represents a chat message.
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type Message struct {
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Role string `json:"role"`
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Content string `json:"content"`
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}
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// ChatRequest is the request payload.
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type ChatRequest struct {
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Model string `json:"model"`
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Messages []Message `json:"messages"`
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Temperature float64 `json:"temperature,omitempty"`
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}
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// ChatResponse is the response from the API.
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type ChatResponse struct {
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Choices []struct {
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Message struct {
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Content string `json:"content"`
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} `json:"message"`
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} `json:"choices"`
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}
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// Complete sends a chat completion request and returns the assistant's response content.
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func (c *Client) Complete(messages []Message) (string, error) {
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reqBody := ChatRequest{
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Model: c.Model,
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Temperature: c.Temperature,
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Messages: messages,
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}
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data, err := json.Marshal(reqBody)
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if err != nil {
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return "", fmt.Errorf("marshal request: %w", err)
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}
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url := c.BaseURL + "/chat/completions"
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req, err := http.NewRequest("POST", url, bytes.NewReader(data))
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if err != nil {
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return "", fmt.Errorf("create request: %w", err)
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}
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req.Header.Set("Authorization", "Bearer "+c.APIKey)
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req.Header.Set("Content-Type", "application/json")
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resp, err := c.HTTP.Do(req)
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if err != nil {
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return "", fmt.Errorf("LLM request: %w", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode < 200 || resp.StatusCode >= 300 {
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body, _ := io.ReadAll(resp.Body)
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return "", fmt.Errorf("LLM API error (status %d): %s", resp.StatusCode, string(body))
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}
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return "", fmt.Errorf("read response: %w", err)
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}
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var chatResp ChatResponse
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if err := json.Unmarshal(body, &chatResp); err != nil {
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return "", fmt.Errorf("parse response: %w", err)
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}
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if len(chatResp.Choices) == 0 {
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return "", fmt.Errorf("no choices in LLM response")
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}
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return chatResp.Choices[0].Message.Content, nil
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}
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