Get started
Install the gem, generate a calculator parser, and choose a mode.
Start here →TASK-ORIENTED REFERENCE
Find the next useful page.
Canonical Markdown in docs/ is rendered here during the Pages build. Maturity metadata remains owned by docs/maturity.yml.
Write a grammar
Declarations, rules, generated parsers, lexers, CSTs, and grammar tests.
Grammar reference →Migrate from racc
Map CLI options, runtime callbacks, and explicit compatibility checks.
Migration guide →Understand contracts
Separate grammar-owned declarations from invocation-owned build and evidence choices.
Configuration model →Check maturity
Stable, Preview, and Experimental are feature-level support boundaries, not version aliases.
Maturity audit →Review status and evidence
Read release readiness, bounded comparisons, trust boundaries, and the current publication decision.
Project status →