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fix: use UTF-8 safe truncation in bootstrap file preview

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Fix panic when displaying workspace files containing multibyte UTF-8 characters by using char_indices().nth() to find safe character boundaries
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Argenis 2026-02-15 10:36:03 -05:00 • committed by GitHub
parent a5241f34ea
commit efe7ae53ce
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GPG key ID: B5690EEEBB952194
1 changed files with 12 additions and 2 deletions
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14
src/channels/mod.rs
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@ -209,8 +209,18 @@ fn inject_workspace_file(prompt: &mut String, workspace_dir: &std::path::Path, f
return;
}
let _ = writeln!(prompt, "### {filename}\n");
if trimmed.len() > BOOTSTRAP_MAX_CHARS {
prompt.push_str(&trimmed[..BOOTSTRAP_MAX_CHARS]);
// Use character-boundary-safe truncation for UTF-8
let truncated = if trimmed.chars().count() > BOOTSTRAP_MAX_CHARS {
trimmed
.char_indices()
.nth(BOOTSTRAP_MAX_CHARS)
.map(|(idx, _)| &trimmed[..idx])
.unwrap_or(trimmed)
} else {
trimmed
};
if truncated.len() < trimmed.len() {
prompt.push_str(truncated);
let _ = writeln!(
prompt,
"\n\n[... truncated at {BOOTSTRAP_MAX_CHARS} chars — use `read` for full file]\n"