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fix(compile): use rune slice to truncate history summary — avoids UTF-8 boundary corruption #75

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fix(compile): use rune slice to truncate history summary — avoids UTF-8 boundary corruption #75

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8 changes: 5 additions & 3 deletions tools/compile.go
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Original file line number Diff line number Diff line change
Expand Up @@ -582,10 +582,12 @@ func buildCompiledArticle(cl Cluster, synthesized string) string {
if cat == "" {
cat = "context"
}
// Truncate content for the summary column (first 80 chars).
// Truncate content for the summary column (first 80 runes).
// Use []rune to avoid slicing mid-multibyte character (e.g. em-dash
// U+2014 is 3 bytes; byte-slicing at boundary produces invalid UTF-8).
summary := l.Content
if len(summary) > 80 {
summary = summary[:80] + "..."
if runes := []rune(summary); len(runes) > 80 {
summary = string(runes[:80]) + "..."
}
// Remove newlines from summary for table formatting.
summary = strings.ReplaceAll(summary, "\n", " ")
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