arch-sign-off

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 (-chn.md) versions. Do not translate it. Keep the  glyph (U+F303, nf-linux-archlinux) as-is.
• 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 + chr(0xF303), stop — nothing to do. Verify with xxd (see below) — the visual glyph can be absent even when the ASCII portion matches.
3. Otherwise append the sign-off as the final line, separated by one blank line from the preceding paragraph. Use the Python one-liner below to insert — do not type the glyph directly, as PUA characters (U+F303) are silently dropped by edit tools and terminals.
4. When the article has a -chn.md counterpart, 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 (use this, not the edit tool)

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 ' + chr(0xF303) + '\n')
"

Replace TARGET_FILE with the article path. The chr(0xF303) is the only reliable way to produce the glyph — visual copy/paste of the glyph does not work.

Verification

• tail -1 FILE | xxd must show ef8c83 (the UTF-8 encoding of U+F303) as the final bytes before the newline.
• No duplicate sign-off lines.
• The -chn.md version (if any) carries the identical line.
• Do not rely on visual inspection. The glyph renders as a box or nothing in most terminals; only xxd or a hex check confirms it is present.

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/.