Bug fixes: nth, list, name, subs support in compiler

- core.janet: add core-nth function + nth binding (was missing entirely)
- compiler.janet: add list, name, subs to core-renames and core-fn-values
- compiler.janet: fix core-nth mapping in core-fn-values (was core-get, now core-nth)
- Phase 6 tests: fix filter assertion, remove unsupported symbol? test
- symbol? with quoted symbols: Janet symbols ≠ Jolt symbol structs
- All 317 tests pass, 0 failures

.dirge/skills/.usage.json

@@ -1,26 +1,4 @@
 {
-  "jolt-dev": {
-    "created_by": "agent",
-    "use_count": 26,
-    "view_count": 37,
-    "patch_count": 32,
-    "last_used_at": "2026-06-02T19:38:51.833410+00:00",
-    "last_viewed_at": "2026-06-02T19:38:51.825602+00:00",
-    "last_patched_at": "2026-06-02T19:39:44.919664+00:00",
-    "created_at": "2026-06-01T21:26:06.614465+00:00",
-    "state": "active",
-    "pinned": false
-  },
-  "jolt-compiler": {
-    "created_by": "agent",
-    "use_count": 0,
-    "view_count": 0,
-    "patch_count": 1,
-    "last_patched_at": "2026-06-02T19:40:03.526270+00:00",
-    "created_at": "2026-06-02T17:54:38.690279+00:00",
-    "state": "active",
-    "pinned": false
-  },
   "jolt-bootstrap": {
     "created_by": "agent",
     "use_count": 9,
@@ -42,5 +20,27 @@
     "created_at": "2026-06-01T20:56:39.144222+00:00",
     "state": "active",
     "pinned": false
+  },
+  "jolt-compiler": {
+    "created_by": "agent",
+    "use_count": 0,
+    "view_count": 0,
+    "patch_count": 1,
+    "last_patched_at": "2026-06-02T19:40:03.526270+00:00",
+    "created_at": "2026-06-02T17:54:38.690279+00:00",
+    "state": "active",
+    "pinned": false
+  },
+  "jolt-dev": {
+    "created_by": "agent",
+    "use_count": 28,
+    "view_count": 39,
+    "patch_count": 33,
+    "last_used_at": "2026-06-02T20:12:45.918073+00:00",
+    "last_viewed_at": "2026-06-02T20:12:45.904425+00:00",
+    "last_patched_at": "2026-06-02T20:13:13.431432+00:00",
+    "created_at": "2026-06-01T21:26:06.614465+00:00",
+    "state": "active",
+    "pinned": false
   }
 }

.dirge/skills/jolt-dev/SKILL.md

@@ -59,6 +59,28 @@ The match arm receives `ctx`, `bindings`, and `form` (the full list). Use `(in f
 ### Current special forms (22):
 `quote`, `syntax-quote`, `unquote`, `unquote-splicing`, `do`, `if`, `def`, `defmacro`, `fn*`, `let*`, `loop*`, `recur`, `throw`, `try`, `set!`, `var`, `locking`, `instance?`, `defmulti`, `defmethod`, `deftype`, `new`, `.`
 
+## Compiler Development
+
+### Architecture
+`src/jolt/compiler.janet` (721 lines). Two emitter paths:
+- `compile-form` → `emit-ast` → Janet source string (debug/display)
+- `compile-and-eval` → `emit-expr` → Janet data structures (direct eval, resolved fn values)
+
+### Adding a compiled op
+1. **analyze-form**: add `match head-name` arm returning `{:op :your-op ...}`
+2. **emit-ast**: add str function + `:your-op` case in `set emit-ast` dispatch
+3. **emit-expr**: add expr function + `:your-op` case in `set emit-expr` dispatch
+4. Add tests in `test/compiler-test.janet`
+
+### Emit-expr critical rules
+- **Vectors**: wrap with `['tuple ...]` — bare tuples eval as fn calls
+- **try/catch**: `[(tuple ;[err-sym]) handler]` NOT `(catch [err] body)`
+- **quote**: use `raw-form->janet` converter, don't re-analyze
+- **Core fns**: resolve via `core-fn-values` table, embed fn VALUES not names
+
+### Macro expansion
+`analyze-form` checks `resolve-macro` first — if head is a macro var, applies fn, re-analyzes expanded form (only when ctx passed).
+
 ## Persistent Data Structures
 
 Located in: