Apply PR #60's slim-to-bot-enforceable pattern to other repos' .github/copilot-instructions.md

[jamditis]

Background

PR #60 (`Slim global rules to bot-enforceable subset`) established the right pattern for handling Copilot's PR review bot's ~4k char read cap: remove English-prose rules entirely rather than hoist them into a separate file. The bot won't enforce sentence case, banned words, or other prose conventions regardless of which file they're in (per MEMORY.md → `feedback_copilot_review_is_bug_finder_not_style_linter.md`), so the Copilot-facing files should carry only bot-enforceable rules: AI-attribution, favicon/OG, code-shape patterns.

After PR #60, `tools/.github/copilot-instructions.md` is 2886 chars with 2 global rules (AI-attribution, favicon/OG) plus project-specific bug classes — well under cap with room to grow.

This issue tracks applying the same slim treatment to the 3 repos that #59 originally flagged at the cap:

• `rosen-frontend` — 3995 chars (5 chars from cap)
• `class` — 3993 chars
• `houseofjawn-bot` — 3992 chars

Each is one byte from invisibly losing content the next time a bug class is added.

What to do per repo

For each of the 3 repos:

1. Read `.github/copilot-instructions.md`
2. Identify the "Global rules to flag" section (or equivalent)
3. Remove these prose-only rules (the bot won't enforce them):
   • Sentence case
   • No emojis (in code/comments — bot doesn't reliably grep for them)
   • Banned words / anti-slop list
4. Keep these bot-enforceable rules:
   • No AI-authorship attribution (bot can grep PR bodies/commits)
   • Favicon/OG meta tags (bot can check meta tag presence) — scope to actually-deployed paths if applicable
5. Confirm the file drops to comfortable size (~2-3k chars)
6. Open a slim-globals PR per repo

The English-prose conventions remain enforced for primary assistants (Claude Code, etc.) via `~/.claude/CLAUDE.md` — they just don't need to be in Copilot-facing files.

Related

• PR Slim copilot-instructions globals to bot-enforceable rules #60 — established the pattern in this repo
• Build sync mechanism for .github/instructions/globals.instructions.md (4k-cap follow-up) #59 (closed) — original framing of the 4k-cap problem
• PR Add copilot-globals sync mechanism (closes #59) #63 (closed) — earlier sync-mechanism approach, abandoned in favor of Slim copilot-instructions globals to bot-enforceable rules #60's pattern
• MEMORY.md → `feedback_copilot_review_is_bug_finder_not_style_linter.md`

Acceptance

• rosen-frontend: PR opened and merged
• class: PR opened and merged
• houseofjawn-bot: PR opened and merged