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package executor
import (
"bufio"
"encoding/json"
"os"
"strings"
)
// extractSummary reads a stream-json stdout log and returns the text following
// the last "## Summary" heading found in any assistant text block.
// Returns empty string if the file cannot be read or no summary is found.
func extractSummary(stdoutPath string) string {
f, err := os.Open(stdoutPath)
if err != nil {
return ""
}
defer f.Close()
var last string
scanner := bufio.NewScanner(f)
scanner.Buffer(make([]byte, 1024*1024), 1024*1024)
for scanner.Scan() {
if text := summaryFromLine(scanner.Bytes()); text != "" {
last = text
}
}
return last
}
// summaryFromLine parses a single stream-json line and returns the text after
// "## Summary" if the line is an assistant text block containing that heading.
func summaryFromLine(line []byte) string {
var event struct {
Type string `json:"type"`
Message struct {
Content []struct {
Type string `json:"type"`
Text string `json:"text"`
} `json:"content"`
} `json:"message"`
}
if err := json.Unmarshal(line, &event); err != nil || event.Type != "assistant" {
return ""
}
for _, block := range event.Message.Content {
if block.Type != "text" {
continue
}
idx := strings.Index(block.Text, "## Summary")
if idx == -1 {
continue
}
return strings.TrimSpace(block.Text[idx+len("## Summary"):])
}
return ""
}
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