Arch Sign-off

Append the Arch Linux sign-off line to the bottom of an article in ai-thoughts/docs/.

Default rule — read before anything else

• Every article in ai-thoughts/docs/ ends with the sign-off line, unless the user explicitly says otherwise. "Unless I say no" means: if the user has not told you to skip it, append it.
• The sign-off is one line at the very bottom of the file, as its own paragraph:

btw, i use arch

• The sign-off stays verbatim English in both the EN and the ZH (-zh-hans.md, legacy -chn.md) versions. Do not translate it.
• If the sign-off is already present, do not duplicate it.

Inputs

• target — path to the article in ai-thoughts/docs/ (optional). If omitted, apply to the article currently being written.

Outputs

• The article file with the sign-off line at the end (or unchanged if already present).

Procedure

1. Check the bottom of the target article.
2. If the last line is already btw, i use arch, stop — nothing to do.
3. Otherwise append the sign-off as the final line, separated by one blank line from the preceding paragraph.
4. When the article has a Chinese counterpart (-zh-hans.md or legacy -chn.md), apply the same line to it (verbatim English).
5. Keep one paragraph per line (no hard-wrap); the sign-off is a single short line.

Insertion

python3 -c "
import pathlib; p = pathlib.Path('TARGET_FILE');
c = p.read_text();
if 'btw, i use arch' not in c:
    p.write_text(c.rstrip() + '\n\nbtw, i use arch\n')
"

Replace TARGET_FILE with the article path.

Verification

• tail -1 FILE outputs exactly btw, i use arch.
• No duplicate sign-off lines.
• The Chinese version (if any — -zh-hans.md or legacy -chn.md) carries the identical line.

Error Handling

• User says no: do not append; leave the article as-is.
• Not an article: never append to READMEs, articles.yaml, or files outside ai-thoughts/docs/.