External copy polish (froQ fleet, 2026-11-04)

When

Drafting text the user will personally send to outsiders: email, GitHub/upstream issue or PR comments, PR descriptions, public short replies, form messages.

Not this skill

• bot ↔ user everyday chat
• in-group Chinese status / compare reports to the user
• commit messages (separate commit rules)
• internal notes, TODOs, logs

Drafts are not final copy, but they must still read like a person wrote them — not obvious AI — or the user has to rewrite them.

Hard boundary unchanged: bots do not post upstream/externally as the user unless that bot's persona already allows it (own repos / agreed derived PRs). Default: draft + link only; user sends from the web UI.

Punctuation

1. Em dash / en dash: avoid unless truly necessary. Prefer period, comma, or two sentences.
2. Semicolon: rare. OK to consider for a lead-in plus several long parallel items (First …; Second …; Third …). Prefer periods or a list when that reads cleaner.
3. Colon: restrained. After a colon, continue the same sentence (e.g. I love three kinds of food: apple, banana, and watermelon.). Do not colon-glue several independent full sentences. Exception: attribution that grammar expects (X said: …).