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package api
import (
"bytes"
"context"
"encoding/json"
"fmt"
"net/http"
"os"
"os/exec"
"path/filepath"
"strings"
"time"
)
const elaborateTimeout = 30 * time.Second
func buildElaboratePrompt(workDir string) string {
workDirLine := ` "project_dir": string — leave empty unless you have a specific reason to set it,`
if workDir != "" {
workDirLine = fmt.Sprintf(` "project_dir": string — use %q for tasks that operate on this codebase, empty string otherwise,`, workDir)
}
return `You are a task configuration assistant for Claudomator, an AI task runner that executes tasks by running Claude or Gemini as a subprocess.
Your ONLY job is to convert any user request into a Claudomator task JSON object. You MUST always output valid JSON. Never ask clarifying questions. Never explain. Never refuse. Make reasonable assumptions and produce the JSON.
Output ONLY a valid JSON object matching this schema (no markdown fences, no prose, no explanation):
{
"name": string — short imperative title (≤60 chars),
"description": string — 1-2 sentence summary,
"agent": {
"type": "claude" | "gemini",
"model": string — "sonnet" for claude, "gemini-2.5-flash-lite" for gemini,
"instructions": string — detailed, step-by-step instructions for the agent,
` + workDirLine + `
"max_budget_usd": number — conservative estimate (0.25–5.00),
"allowed_tools": array — only tools the task genuinely needs
},
"timeout": string — e.g. "15m",
"priority": string — "normal" | "high" | "low",
"tags": array — relevant lowercase tags
}`
}
// elaboratedTask mirrors the task creation schema for elaboration responses.
type elaboratedTask struct {
Name string `json:"name"`
Description string `json:"description"`
Agent elaboratedAgent `json:"agent"`
Timeout string `json:"timeout"`
Priority string `json:"priority"`
Tags []string `json:"tags"`
}
type elaboratedAgent struct {
Type string `json:"type"`
Model string `json:"model"`
Instructions string `json:"instructions"`
ProjectDir string `json:"project_dir"`
MaxBudgetUSD float64 `json:"max_budget_usd"`
AllowedTools []string `json:"allowed_tools"`
}
// claudeJSONResult is the top-level object returned by `claude --output-format json`.
type claudeJSONResult struct {
Result string `json:"result"`
}
// extractJSON returns the first top-level JSON object found in s, stripping
// surrounding prose or markdown code fences the model may have added.
func extractJSON(s string) string {
start := strings.Index(s, "{")
end := strings.LastIndex(s, "}")
if start == -1 || end == -1 || end < start {
return s
}
return s[start : end+1]
}
func (s *Server) claudeBinaryPath() string {
if s.elaborateCmdPath != "" {
return s.elaborateCmdPath
}
if s.claudeBinPath != "" {
return s.claudeBinPath
}
return "claude"
}
func readProjectContext(workDir string) string {
if workDir == "" {
return ""
}
var sb strings.Builder
for _, filename := range []string{"CLAUDE.md", "SESSION_STATE.md"} {
path := filepath.Join(workDir, filename)
if data, err := os.ReadFile(path); err == nil {
if sb.Len() > 0 {
sb.WriteString("\n\n")
}
sb.WriteString(fmt.Sprintf("--- %s ---\n%s", filename, string(data)))
}
}
return sb.String()
}
func (s *Server) appendRawNarrative(workDir, prompt string) {
if workDir == "" {
return
}
docsDir := filepath.Join(workDir, "docs")
if err := os.MkdirAll(docsDir, 0755); err != nil {
s.logger.Error("elaborate: failed to create docs directory", "error", err, "path", docsDir)
return
}
path := filepath.Join(docsDir, "RAW_NARRATIVE.md")
f, err := os.OpenFile(path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
s.logger.Error("elaborate: failed to open RAW_NARRATIVE.md", "error", err, "path", path)
return
}
defer f.Close()
entry := fmt.Sprintf("\n--- %s ---\n%s\n", time.Now().Format(time.RFC3339), prompt)
if _, err := f.WriteString(entry); err != nil {
s.logger.Error("elaborate: failed to write to RAW_NARRATIVE.md", "error", err, "path", path)
}
}
func (s *Server) handleElaborateTask(w http.ResponseWriter, r *http.Request) {
if s.elaborateLimiter != nil && !s.elaborateLimiter.allow(realIP(r)) {
writeJSON(w, http.StatusTooManyRequests, map[string]string{"error": "rate limit exceeded"})
return
}
var input struct {
Prompt string `json:"prompt"`
ProjectDir string `json:"project_dir"`
}
if err := json.NewDecoder(r.Body).Decode(&input); err != nil {
writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid JSON: " + err.Error()})
return
}
if input.Prompt == "" {
writeJSON(w, http.StatusBadRequest, map[string]string{"error": "prompt is required"})
return
}
workDir := s.workDir
if input.ProjectDir != "" {
workDir = input.ProjectDir
}
// Append verbatim user input to RAW_NARRATIVE.md in the background (best effort).
go s.appendRawNarrative(workDir, input.Prompt)
projectContext := readProjectContext(workDir)
fullPrompt := input.Prompt
if projectContext != "" {
fullPrompt = fmt.Sprintf("Project context from %s:\n%s\n\nUser request: %s", workDir, projectContext, input.Prompt)
}
ctx, cancel := context.WithTimeout(r.Context(), elaborateTimeout)
defer cancel()
cmd := exec.CommandContext(ctx, s.claudeBinaryPath(),
"-p", fullPrompt,
"--system-prompt", buildElaboratePrompt(workDir),
"--output-format", "json",
"--model", "haiku",
)
var stdout, stderr bytes.Buffer
cmd.Stdout = &stdout
cmd.Stderr = &stderr
if err := cmd.Run(); err != nil {
s.logger.Error("elaborate: claude subprocess failed", "error", err, "stderr", stderr.String())
writeJSON(w, http.StatusBadGateway, map[string]string{
"error": fmt.Sprintf("elaboration failed: %v", err),
})
return
}
// claude --output-format json wraps the text result in {"result": "...", ...}
var wrapper claudeJSONResult
if err := json.Unmarshal(stdout.Bytes(), &wrapper); err != nil {
s.logger.Error("elaborate: failed to parse claude JSON wrapper", "error", err, "stdout", stdout.String())
writeJSON(w, http.StatusBadGateway, map[string]string{
"error": "elaboration failed: invalid JSON from claude",
})
return
}
var result elaboratedTask
if err := json.Unmarshal([]byte(extractJSON(wrapper.Result)), &result); err != nil {
s.logger.Error("elaborate: failed to parse elaborated task JSON", "error", err, "result", wrapper.Result)
writeJSON(w, http.StatusBadGateway, map[string]string{
"error": "elaboration failed: claude returned invalid task JSON",
})
return
}
if result.Name == "" || result.Agent.Instructions == "" {
writeJSON(w, http.StatusBadGateway, map[string]string{
"error": "elaboration failed: missing required fields in response",
})
return
}
if result.Agent.Type == "" {
result.Agent.Type = "claude"
}
writeJSON(w, http.StatusOK, result)
}
|
