feat(hooks+skills): destructive-bash confirm + architecture suite + problem-solving routing

Three improvements bundled together:

1. New hook — `destructive-bash-confirm.py` (PreToolUse/Bash):
   Gates `git push --force`, `git reset --hard`, `git clean -f`,
   `git branch -D`, and `rm -rf` behind a confirmation modal with the
   command, local context (branch, uncommitted counts, targeted paths),
   and a severity banner. Elevates severity when force-pushing protected
   branches (main/master/develop/release/prod) or when rm -rf targets
   root, home, or wildcard paths. Reuses _common.py.

2. Architecture suite rename — the "Part of the arch-* suite" footer in
   arch-design, arch-decide, arch-document, arch-evaluate descriptions
   now reads "Part of the architecture suite (arch-design / arch-decide
   / arch-document / arch-evaluate + c4-analyze / c4-diagram for
   notation-specific diagramming)." Matching footers added to c4-analyze
   and c4-diagram. c4-* keep their framework-specific prefix (C4 is a
   notation, arch-* is framework-agnostic workflow) but are now
   discoverable as suite members.

3. Problem-solving cluster routing — added YAML frontmatter with
   descriptions (including "Do NOT use for X (use Y)" clauses) to
   debug/SKILL.md and fix-issue/SKILL.md. Previously both had no
   frontmatter at all, which broke skill-router discovery. The four
   cluster members (debug, fix-issue, root-cause-trace, five-whys) now
   route unambiguously by description alone.

1 files changed, 1 insertions, 0 deletions

diff --git a/hooks/README.md b/hooks/README.md
index 97dd881..5555514 100644
--- a/hooks/README.md
+++ b/hooks/README.md
@@ -9,6 +9,7 @@ Machine-wide Claude Code hooks that install into `~/.claude/hooks/` and apply to
 | `precompact-priorities.sh` | `PreCompact` | Injects a priority-preservation block into Claude's compaction prompt so the generated summary retains information most expensive to reconstruct (unanswered questions, root causes with `file:line`, subagent findings, exact numbers/IDs, A-vs-B decisions, open TODOs, classified-data handling). |
 | `git-commit-confirm.py` | `PreToolUse(Bash)` | Gates `git commit` behind a confirmation modal showing the parsed message, staged files, diff stats, and git author. Parses both HEREDOC and `-m`/`--message` forms. |
 | `gh-pr-create-confirm.py` | `PreToolUse(Bash)` | Gates `gh pr create` behind a confirmation modal showing title, base←head, reviewers, labels, assignees, milestone, draft flag, and body (HEREDOC or quoted). |
+| `destructive-bash-confirm.py` | `PreToolUse(Bash)` | Gates destructive commands (`git push --force`, `git reset --hard`, `git clean -f`, `git branch -D`, `rm -rf`) with a modal showing the command, local context (branch, uncommitted file counts, targeted paths), and a warning banner. Elevates severity when force-pushing protected branches or targeting root/home/wildcard paths. |
 
 Shared library (not a hook): `_common.py` — `read_payload()`, `respond_ask()`, `scan_attribution()`. Installed as a sibling symlink so the two Python hooks can `from _common import …` at runtime.