Phase 12: Protocol System — full implementation with all tests passing

Root cause: fn* multi-arity detection checks (array? (in form 1))
— defprotocol used @[...] for args, triggering multi-arity path
that treated the body form as a second arity pair.

Fixes applied:
- defprotocol: change fn* args from @[...] to [...] (tuple)
  so single-arity fn* path is used with [this & rest-args]
- defprotocol: remove quote wrappers from protocol-dispatch call
  (protocol-name and method-name passed directly as symbols)
- extend-type/extend-protocol: remove quote wrappers from
  register-method call (symbols passed directly, not via quote)
- protocol-dispatch: use (in form ...) directly for proto/method
  symbols (no eval-form needed after quote removal)
- satisfy?: extract name string from protocol value's :name field
  (which is a symbol struct, not a plain string)
- make-reified: remove spurious (apply fn []) call
- core-reify: fix (keyword struct) → extract :name string first
- core-extend-protocol: handle single method spec vs multi

5 test sections (35-39) covering:
  defprotocol, extend-type, extend-protocol,
  satisfies?, reify — all pass

315 ok, 2 fail (pre-existing, unchanged)

.dirge/skills/.usage.json

@@ -1,32 +1,23 @@
 {
-  "jolt-persistent-structures": {
+  "jolt-dev": {
     "created_by": "agent",
-    "use_count": 1,
-    "view_count": 7,
-    "patch_count": 0,
-    "last_used_at": "2026-06-03T03:49:43.520839+00:00",
-    "last_viewed_at": "2026-06-03T04:18:13.482762+00:00",
-    "created_at": "2026-06-03T03:35:04.130959+00:00",
-    "state": "active",
-    "pinned": false
-  },
-  "jolt-gotchas": {
-    "created_by": "agent",
-    "use_count": 0,
-    "view_count": 5,
-    "patch_count": 0,
-    "last_viewed_at": "2026-06-03T04:18:13.476736+00:00",
-    "created_at": "2026-06-03T03:50:41.474730+00:00",
+    "use_count": 35,
+    "view_count": 62,
+    "patch_count": 42,
+    "last_used_at": "2026-06-03T03:49:43.510599+00:00",
+    "last_viewed_at": "2026-06-03T04:20:32.579847+00:00",
+    "last_patched_at": "2026-06-03T03:34:09.007253+00:00",
+    "created_at": "2026-06-01T21:26:06.614465+00:00",
     "state": "active",
     "pinned": false
   },
   "jolt-compiler": {
     "created_by": "agent",
     "use_count": 9,
-    "view_count": 19,
+    "view_count": 25,
     "patch_count": 9,
     "last_used_at": "2026-06-03T03:49:43.470444+00:00",
-    "last_viewed_at": "2026-06-03T04:18:13.465606+00:00",
+    "last_viewed_at": "2026-06-03T04:20:32.574065+00:00",
     "last_patched_at": "2026-06-03T03:03:27.524946+00:00",
     "created_at": "2026-06-02T17:54:38.690279+00:00",
     "state": "active",
@@ -35,35 +26,44 @@
   "jpm-build": {
     "created_by": "agent",
     "use_count": 0,
-    "view_count": 21,
+    "view_count": 27,
     "patch_count": 0,
-    "last_viewed_at": "2026-06-03T04:18:13.488874+00:00",
+    "last_viewed_at": "2026-06-03T04:20:32.597461+00:00",
     "created_at": "2026-06-01T20:56:39.144222+00:00",
     "state": "active",
     "pinned": false
   },
-  "jolt-dev": {
-    "created_by": "agent",
-    "use_count": 35,
-    "view_count": 56,
-    "patch_count": 42,
-    "last_used_at": "2026-06-03T03:49:43.510599+00:00",
-    "last_viewed_at": "2026-06-03T04:18:13.470424+00:00",
-    "last_patched_at": "2026-06-03T03:34:09.007253+00:00",
-    "created_at": "2026-06-01T21:26:06.614465+00:00",
-    "state": "active",
-    "pinned": false
-  },
   "jolt-bootstrap": {
     "created_by": "agent",
     "use_count": 9,
-    "view_count": 30,
+    "view_count": 36,
     "patch_count": 10,
     "last_used_at": "2026-06-02T18:45:23.336653+00:00",
-    "last_viewed_at": "2026-06-03T04:18:13.459884+00:00",
+    "last_viewed_at": "2026-06-03T04:20:32.567542+00:00",
     "last_patched_at": "2026-06-02T03:44:45.935676+00:00",
     "created_at": "2026-06-01T21:49:51.101718+00:00",
     "state": "active",
     "pinned": false
+  },
+  "jolt-gotchas": {
+    "created_by": "agent",
+    "use_count": 0,
+    "view_count": 11,
+    "patch_count": 0,
+    "last_viewed_at": "2026-06-03T04:20:32.585916+00:00",
+    "created_at": "2026-06-03T03:50:41.474730+00:00",
+    "state": "active",
+    "pinned": false
+  },
+  "jolt-persistent-structures": {
+    "created_by": "agent",
+    "use_count": 1,
+    "view_count": 13,
+    "patch_count": 0,
+    "last_used_at": "2026-06-03T03:49:43.520839+00:00",
+    "last_viewed_at": "2026-06-03T04:20:32.591070+00:00",
+    "created_at": "2026-06-03T03:35:04.130959+00:00",
+    "state": "active",
+    "pinned": false
   }
 }