common-lisp: Phase 1 reader + 62 tests (141 total)

lib/common-lisp/parser.sx — cl-read/cl-read-all: lists, dotted
pairs (a . b) → cons dict, quote/backquote/unquote/splice as
wrapper lists, #' → FUNCTION, #(…) → vector dict, #:foo →
uninterned dict, NIL→nil, T→true, integer radix conversion
(#xFF/#b1010/#o17). Floats/ratios kept as annotated dicts.

lib/common-lisp/tests/parse.sx — 62 tests, all green.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plans/common-lisp-on-sx.md

@@ -51,7 +51,7 @@ Core mapping:
 
 ### Phase 1 — reader + parser
 - [x] Tokenizer: symbols (with package qualification `pkg:sym` / `pkg::sym`), numbers (int, float, ratio `1/3`, `#xFF`, `#b1010`, `#o17`), strings `"…"` with `\` escapes, characters `#\Space` `#\Newline` `#\a`, comments `;`, block comments `#| … |#`
-- [ ] Reader: list, dotted pair, quote `'`, function `#'`, quasiquote `` ` ``, unquote `,`, splice `,@`, vector `#(…)`, uninterned `#:foo`, nil/t literals
+- [x] Reader: list, dotted pair, quote `'`, function `#'`, quasiquote `` ` ``, unquote `,`, splice `,@`, vector `#(…)`, uninterned `#:foo`, nil/t literals
 - [ ] Parser: lambda lists with `&optional` `&rest` `&key` `&aux` `&allow-other-keys`, defaults, supplied-p variables
 - [ ] Unit tests in `lib/common-lisp/tests/read.sx`
 
@@ -114,6 +114,7 @@ Core mapping:
 
 _Newest first._
 
+- 2026-04-25: Phase 1 reader/parser — 62 new tests, 141 total green. `lib/common-lisp/parser.sx`: cl-read/cl-read-all, lists, dotted pairs, quote/backquote/unquote/splice/#', vectors, #:uninterned, NIL→nil, T→true, reader macro wrappers.
 - 2026-04-25: Phase 1 tokenizer — 79 tests green. `lib/common-lisp/reader.sx` + `tests/read.sx` + `test.sh`. Handles symbols (pkg:sym, pkg::sym), integers, floats, ratios, hex/binary/octal, strings, #\ chars, reader macros (#' #( #: ,@), line/block comments. Key gotcha: SX `str` for string concat (not `concat`), substring-based read-while.
 
 ## Blockers