regen-parser

name	regen-parser
description	Regenerate the tree-sitter parser from grammar.js and run corpus tests. Use after editing grammar.js, or whenever src/parser.c may be stale.

Run these two commands from the repo root, in order:

tree-sitter generate
make test

• tree-sitter generate rewrites src/parser.c, src/grammar.json, src/node-types.json, and src/tree_sitter/*.h from grammar.js.
• make test runs tree-sitter test against the corpus in test/corpus/.

If tree-sitter generate fails, the grammar has a structural error (left-recursion, conflict, undefined rule) — fix grammar.js and rerun. Do not edit anything under src/ by hand; it is fully overwritten on every run.

If make test fails:

1. Read the failing corpus expectation vs. actual S-expression in the output.
2. Decide whether the grammar or the expectation is wrong — usually the grammar.
3. Edit grammar.js, rerun this skill.

Commit the regenerated src/ files together with the grammar.js change in the same commit. Commit message format: grammar: <summary> with --gpg-sign.