feat(caveman): full install — plugin + standalone hooks + MCP scaffold

Wires JuliusBrussee/caveman into the always-on tier alongside
security-guidance and superpowers. Caveman compresses Claude's output
tokens (~75%) by speaking like a caveman while keeping technical
substance. Three layers:

  1. Plugin (caveman@caveman, marketplace JuliusBrussee/caveman)
     — adds /caveman, /caveman-commit, /caveman-review, /caveman-stats,
       /caveman-help, /cavecrew, /compress + 3 cavecrew agents +
       SessionStart/UserPromptSubmit hooks from the plugin path.
  2. Standalone hooks (statusline + stats badge) deployed by
     caveman's own hooks/install.sh into ~/.claude/hooks/. Paths in
     settings.json normalized to ~/.claude/hooks/... so this user's
     home dir doesn't leak across machines.
  3. caveman-shrink MCP proxy — NOT auto-registered. The bare proxy
     fails health checks because it requires an upstream MCP server
     to wrap. install-plugins.sh STEP 5.5 prints a snippet showing how
     to register a wrapped entry (e.g. caveman-shrink-fs) when the user
     decides which upstream to compress.

New helper enable_plugin() for explicit always-on activation —
'claude plugin install' only copies into cache, doesn't write
enabledPlugins. Idempotent via Python json check.

doctor.sh adds detect_caveman / detect_caveman_hooks / detect_caveman_shrink
checks plus a 300t passive-cost adder. update-all.sh refreshes hook
files via the upstream installer's --force mode.

.gitignore covers caveman runtime files materialized into hooks/
because ~/.claude/hooks is symlinked to this repo.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

doctor.sh

@@ -182,6 +182,22 @@ else
   info "Graphifyy not installed (optional — codebase knowledge graph: pipx install graphifyy)"
 fi
 
+if detect_caveman; then
+  pass "Caveman plugin installed"
+  if detect_caveman_hooks; then
+    pass "Caveman standalone hooks (statusline + stats) installed"
+  else
+    warn "Caveman plugin OK but standalone hooks missing — re-run install-plugins.sh"
+  fi
+  if detect_caveman_shrink; then
+    pass "caveman-shrink MCP wrapper registered (custom upstream)"
+  else
+    info "caveman-shrink MCP not wrapped — manual setup (proxy, needs upstream): see install-plugins.sh STEP 5.5"
+  fi
+else
+  info "Caveman not installed (optional — output compression ~75%: run install-plugins.sh)"
+fi
+
 echo ""
 
 # ────────────────────────────────────────────────────────────
@@ -247,6 +263,7 @@ if detect_gstack      2>/dev/null; then PLUGIN_TOKENS=$((PLUGIN_TOKENS + 2750));
 if detect_uiux_pro_max    2>/dev/null; then PLUGIN_TOKENS=$((PLUGIN_TOKENS + 400)); fi
 if detect_context7    2>/dev/null; then PLUGIN_TOKENS=$((PLUGIN_TOKENS + 200)); fi
 if detect_graphifyy   2>/dev/null; then PLUGIN_TOKENS=$((PLUGIN_TOKENS + 300)); fi
+if detect_caveman     2>/dev/null; then PLUGIN_TOKENS=$((PLUGIN_TOKENS + 300)); fi
 
 TOTAL_TOKENS=$((CLAUDE_MD_TOKENS + SKILL_DESC_TOKENS + PLUGIN_TOKENS))
 SESSION_BUDGET=11000