Executable plan for spec 0057 (committed c760570). Single iteration,
four tasks: (1) LexError::ReservedDollar variant + inline tokenize
guard + 3 in-source lexer tests (RED-first on the must-fail
dollar_in_ident_is_reserved); (2) fresh_binder doc-comment correction;
(3) a surface integration test pinning the
parse -> ParseError::Lex(ReservedDollar) surfacing chain; (4)
no-regression sweep (workspace suite + CLI checks on a comment-dollar
example and the #43 shadow idiom).
plan-recon verified all line anchors against HEAD (lex.rs:183
run-slice, lex.rs:67-76 enum, 19 in-source tests, desugar.rs:528-536
doc-comment, parse.rs:103/126/149, main.rs:1339, ct1_check_cli.rs:310)
and confirmed none of the three CLAUDE.md lockstep pairs apply.
Self-review caught and fixed two defects before hand-off: the
integration test imported the private lex/parse module paths
(corrected to the crate-root re-exports
ailang_surface::{parse, LexError, ParseError}), and the compile-gate
check confirmed no external exhaustive match on LexError exists, so
adding a variant cannot break compilation and the Task 1 RED is a
genuine runtime expect_err panic.
Brummel
559531806d