diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 913ef2a..a0af98f 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -2,18 +2,12 @@
 
 Project context, architecture, and conventions live in [CLAUDE.md](../CLAUDE.md). Both this file and CLAUDE.md are read by Copilot code review (cap ~4,000 chars each). This file lists the rules worth named attention on every PR.
 
-## Global rules to flag
-
-These are Joe's user-level conventions from `~/.claude/CLAUDE.md`, restated here because Copilot's PR review bot does not read user-level files.
-
-- **Sentence case** in UI text, headings, comments, prose, and commit messages. Code identifiers follow language conventions: camelCase (JS), kebab-case (CSS class names), snake_case (Python). The rule is about not writing English prose in Title Case, not about overriding language naming conventions.
-- **No emojis** in source code, log messages, comments, commits, PR bodies, or any output. Plain text only.
-- **No AI-authorship attribution.** Never include "Generated with Claude Code", `Co-Authored-By: Claude` trailers, or any "AI-assisted"/"Generated by"-style notes in PR bodies, commit trailers, code comments, or committed docs. Mentioning model/company names in technical documentation (including this file's anti-slop guidance) is fine — the ban is on AI authorship credits.
-- **Banned words / anti-slop.** Replace or delete (this list is a review reference and is exempt from its own rule): *comprehensive, sophisticated, robust, transformative, leveraging, seamlessly, innovative, cutting-edge, state-of-the-art, holistic, synergy, ecosystem, paradigm, empower*.
-- **Every public-facing HTML page must include the favicon link tag** `<link rel="icon" type="image/svg+xml" href="...">` (use a relative path from each subdirectory) and full OG/Twitter meta tags: `og:title`, `og:description`, `og:type`, `og:url`, `og:image` (1200x630), `og:image:width=1200`, `og:image:height=630`, `twitter:card=summary_large_image`, `twitter:title`, `twitter:description`, `twitter:image`. Missing favicons are a security signal — automated scanners flag pages without them.
+User-level globals (sentence case, no emojis, banned words, no AI-authorship attribution, code-quality basics) live in [`.github/instructions/globals.instructions.md`](instructions/globals.instructions.md), generated from `~/.claude/copilot-globals.md` by `scripts/sync-copilot-globals.py`. Don't restate them here.
 
 ## Project-specific bug classes to flag
 
+- **Every deployed HTML page** under `resource-kit/docs/**/*.html` (the GitHub Pages source) must include the favicon link tag `<link rel="icon" type="image/svg+xml" href="...">` (relative path from each subdirectory) and full OG/Twitter meta tags: `og:title`, `og:description`, `og:type`, `og:url`, `og:image` (1200x630), `og:image:width=1200`, `og:image:height=630`, `twitter:card=summary_large_image`, `twitter:title`, `twitter:description`, `twitter:image`. Files outside `resource-kit/docs/` (including `_archive/**`) are not deployed and exempt.
+
 - **No hardcoded API keys or secrets.** Static-site repo, no server. Any inline key in HTML/JS is a leak.
 - **Event listeners attached to the wrong scope.** The sidebar and modal in the LLM Advisor live OUTSIDE `#llm-tool-advisor-container`. Listeners attached only to the main container miss those elements.
 - **Generic class names inside SVG `<style>` tags.** SVG styles are not scoped and leak into the whole document. A `.block` rule inside an inline SVG applies to every Tailwind `block` element on the page. Require prefixed names (`svg-block`, `svg-shift`).
diff --git a/.github/instructions/globals.instructions.md b/.github/instructions/globals.instructions.md
new file mode 100644
index 0000000..0b201c8
--- /dev/null
+++ b/.github/instructions/globals.instructions.md
@@ -0,0 +1,29 @@
+---
+applyTo: "**"
+---
+
+<!-- Generated by tools/scripts/sync-copilot-globals.py from ~/.claude/copilot-globals.md. Edit the source, then re-run the script. -->
+
+# Global review rules for Joe's repos
+
+These rules apply to ALL pull requests across Joe's repositories. They live here once and are synced into each subscribed repo's `.github/instructions/globals.instructions.md` by `tools/scripts/sync-copilot-globals.py`. Each project's `.github/copilot-instructions.md` then carries only project-specific bug classes, leaving room under the ~4k-char Copilot read cap for that project's real architecture rules.
+
+The Copilot PR review bot reads this file in addition to `.github/copilot-instructions.md` and the project's `CLAUDE.md` / `AGENTS.md` / `GEMINI.md`. None of those need to restate the rules below.
+
+## Writing style
+
+- **Sentence case** in UI text, headings, comments, prose, and commit messages. Code identifiers follow language conventions: camelCase (JS), kebab-case (CSS class names), snake_case (Python), UPPER_SNAKE_CASE (constants), PascalCase (classes). The rule is about not writing English prose in Title Case, not about overriding language naming conventions.
+- **No emojis** in source code, log messages, comments, commits, PR bodies, or any committed output. Plain text only.
+- **Banned words / anti-slop.** Replace or delete (this list is itself a review reference and is exempt from its own rule): *comprehensive, sophisticated, robust, transformative, leveraging, seamlessly, innovative, cutting-edge, state-of-the-art, holistic, synergy, ecosystem, paradigm, empower*. Substitutes: "full" / "complete" for comprehensive, "using" for leveraging, "stable" / "reliable" for robust, "advanced" or describe specifics for sophisticated.
+- **AP style** for prose: "more than" for quantities (never "over"), Oxford comma, sentence-case headings.
+
+## AI authorship
+
+- **No AI-authorship attribution.** Never include "Generated with Claude Code", `Co-Authored-By: Claude` trailers, "AI-assisted" notes, or any "Generated by [model]"-style credit in PR bodies, commit trailers, code comments, or committed docs. Mentioning model or company names in technical documentation (e.g., "uses Claude Sonnet 4.6 for fast chat") is fine — the ban is specifically on AI authorship credit lines.
+
+## Code quality
+
+- **Test suite first.** Tests must accompany feature code and bug fixes. Lint + tests must pass before requesting review.
+- **No backwards-compatibility shims for unused code.** Don't keep dead `_var` renames, `// removed` comment markers, or feature flags for code being deleted.
+- **No defensive code for impossible states.** Don't add error handling, fallbacks, or validation for scenarios the type system or framework already guarantees. Validate at system boundaries (user input, external APIs) only.
+- **Comments only when WHY is non-obvious.** No multi-paragraph code comments. One short line maximum. Don't restate WHAT the code does — names should already do that. Don't reference current task / fix / callers — that belongs in the PR description.
diff --git a/CLAUDE.md b/CLAUDE.md
index ea734c3..c4db4e0 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -102,6 +102,30 @@ python -m http.server 8000
 **Deploy:** GitHub Actions (`static.yml`) uploads `resource-kit/docs/` as a Pages artifact on push to master
 **Fallback:** `bash deploy.sh` deploys to Cloudflare Pages (`tools-pages.pages.dev`) — only use if GitHub Pages is down
 
+## Copilot review globals (cross-repo sync)
+
+This repo hosts the script that distributes Joe's user-level review rules to every subscribed repo as a path-scoped Copilot instructions file.
+
+**Source of truth:** `~/.claude/copilot-globals.md` (writing style, banned words, no AI-attribution, code-quality basics). Hand-edit there when a rule changes.
+
+**Sync target:** each subscribed repo's `.github/instructions/globals.instructions.md`. Copilot's PR review bot reads these files in addition to `.github/copilot-instructions.md` (with `applyTo` glob and `excludeAgent` opt-out support, per the GitHub Copilot path-specific instructions docs).
+
+**Why:** Each Copilot-readable file has roughly a 4,000-char silent-truncation cap. Restating ~1,700 chars of globals in every project's `copilot-instructions.md` was pushing several past the cap (rosen-frontend, class, houseofjawn-bot at 3995 / 3993 / 3992 chars at the time of #59). Hoisting globals into a separate path-scoped file frees that space for project-specific bug classes.
+
+**Subscribed repos:** listed in `scripts/sync-targets.txt` (one absolute path per line, `#` for comments, `~` expansion supported).
+
+**After editing the source:**
+
+```bash
+~/projects/tools/scripts/sync-copilot-globals.py             # write to all subscribed repos
+~/projects/tools/scripts/sync-copilot-globals.py --dry-run   # preview without writing
+~/projects/tools/scripts/sync-copilot-globals.py --only tools  # filter to one repo by name
+```
+
+Each subscribed repo should commit its `.github/instructions/globals.instructions.md` (the file is generated but committed so Copilot can read it without runtime sync). When a repo first subscribes, also slim its `.github/copilot-instructions.md` by removing the now-redundant "Global rules to flag" section.
+
+This setup does **not** modify any project's `CLAUDE.md`. CLAUDE.md remains the single source of truth for primary coding assistants and is not bound by the 4k Copilot-read cap.
+
 ## LLM Advisor architecture
 
 The LLM Advisor (`resource-kit/docs/llm-advisor/`) uses:
diff --git a/scripts/sync-copilot-globals.py b/scripts/sync-copilot-globals.py
new file mode 100755
index 0000000..2914d90
--- /dev/null
+++ b/scripts/sync-copilot-globals.py
@@ -0,0 +1,128 @@
+#!/usr/bin/env python3
+"""Sync ~/.claude/copilot-globals.md into each subscribed repo's
+.github/instructions/globals.instructions.md.
+
+Background: GitHub Copilot's PR review bot reads `.github/copilot-instructions.md`
+plus any `.github/instructions/*.instructions.md` files (with applyTo glob support
+and excludeAgent opt-out). Each file has roughly a 4,000-char silent-truncation
+cap. Joe's user-level globals previously had to be restated in every project's
+copilot-instructions.md, pushing several past the cap. This script hoists the
+globals into a path-scoped instructions file maintained in one place.
+
+Usage:
+    sync-copilot-globals.py [--source PATH] [--targets PATH] [--dry-run]
+                            [--only NAME[,NAME...]] [REPO ...]
+
+If REPO arguments are given, they override the targets file.
+Default source: ~/.claude/copilot-globals.md
+Default targets file: tools/scripts/sync-targets.txt (sibling to this script).
+
+Exit codes:
+    0  all targets updated (or unchanged)
+    1  one or more targets failed
+"""
+
+import argparse
+import sys
+from pathlib import Path
+
+DEFAULT_SOURCE = Path.home() / ".claude" / "copilot-globals.md"
+DEFAULT_TARGETS_FILE = Path(__file__).resolve().parent / "sync-targets.txt"
+GENERATED_HEADER = (
+    "<!-- Generated by tools/scripts/sync-copilot-globals.py "
+    "from ~/.claude/copilot-globals.md. Edit the source, then re-run the script. -->"
+)
+
+
+def load_targets(targets_file: Path) -> list[Path]:
+    if not targets_file.exists():
+        return []
+    out = []
+    for raw in targets_file.read_text().splitlines():
+        line = raw.strip()
+        if not line or line.startswith("#"):
+            continue
+        out.append(Path(line).expanduser())
+    return out
+
+
+def render_output(source_text: str) -> str:
+    """Insert the generated-header marker after the YAML frontmatter."""
+    if source_text.startswith("---\n"):
+        end = source_text.find("\n---\n", 4)
+        if end != -1:
+            frontmatter = source_text[: end + 5]
+            body = source_text[end + 5 :].lstrip("\n")
+            return f"{frontmatter}\n{GENERATED_HEADER}\n\n{body}"
+    return f"{GENERATED_HEADER}\n\n{source_text}"
+
+
+def sync_to(repo: Path, content: str, dry_run: bool) -> str:
+    target = repo / ".github" / "instructions" / "globals.instructions.md"
+    existing = target.read_text() if target.exists() else None
+    if existing == content:
+        return f"unchanged: {target}"
+    verb_prefix = "would " if dry_run else ""
+    verb = "create" if existing is None else "update"
+    if dry_run:
+        return f"{verb_prefix}{verb}: {target}"
+    target.parent.mkdir(parents=True, exist_ok=True)
+    target.write_text(content)
+    return f"{verb}d: {target}"
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(
+        description=__doc__,
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+    )
+    parser.add_argument("--source", type=Path, default=DEFAULT_SOURCE,
+                        help=f"Source file (default: {DEFAULT_SOURCE})")
+    parser.add_argument("--targets", type=Path, default=DEFAULT_TARGETS_FILE,
+                        help=f"Targets list file (default: {DEFAULT_TARGETS_FILE})")
+    parser.add_argument("--dry-run", action="store_true",
+                        help="Print what would change without writing")
+    parser.add_argument("--only", default="",
+                        help="Comma-separated repo names to filter the targets list")
+    parser.add_argument("repos", nargs="*", type=Path,
+                        help="Repo paths (overrides the targets file)")
+    args = parser.parse_args()
+
+    if not args.source.exists():
+        print(f"error: source not found: {args.source}", file=sys.stderr)
+        return 1
+
+    content = render_output(args.source.read_text())
+
+    repos = args.repos or load_targets(args.targets)
+    if not repos:
+        print(
+            f"error: no target repos given and {args.targets} is empty or missing",
+            file=sys.stderr,
+        )
+        return 1
+
+    if args.only:
+        only = {n.strip() for n in args.only.split(",") if n.strip()}
+        repos = [r for r in repos if r.name in only]
+        if not repos:
+            print(f"error: --only {args.only} matched no targets", file=sys.stderr)
+            return 1
+
+    failed = 0
+    for repo in repos:
+        if not (repo / ".git").is_dir():
+            print(f"skip: not a git repo: {repo}", file=sys.stderr)
+            failed += 1
+            continue
+        try:
+            print(sync_to(repo, content, dry_run=args.dry_run))
+        except OSError as exc:
+            print(f"error: {repo}: {exc}", file=sys.stderr)
+            failed += 1
+
+    return 1 if failed else 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/scripts/sync-targets.txt b/scripts/sync-targets.txt
new file mode 100644
index 0000000..509e6eb
--- /dev/null
+++ b/scripts/sync-targets.txt
@@ -0,0 +1,16 @@
+# Repos subscribed to ~/.claude/copilot-globals.md.
+# One absolute path per line. Lines starting with # are ignored.
+# Tilde expansion is supported.
+#
+# To subscribe a new repo:
+#   1. Add its path here
+#   2. Run scripts/sync-copilot-globals.py
+#   3. In that repo, slim .github/copilot-instructions.md by removing the
+#      "Global rules to flag" section (now lives in
+#      .github/instructions/globals.instructions.md)
+#   4. Open a PR with both files in the same commit
+#
+# After ~/.claude/copilot-globals.md changes, run from anywhere:
+#   ~/projects/tools/scripts/sync-copilot-globals.py
+
+~/projects/tools