Tailwind registers internal slots (`--tw-content`, `--tw-shadow`, …) via
`@property` rules that supply their defaults. `decompose` dropped those
rules, so utilities that reference a slot without setting it locally —
notably `after:*`/`before:*` emitting `content: var(--tw-content)` — left
a dangling reference that resolves to nothing and suppresses the
pseudo-element.
`decompose` now captures the `@property` registrations, and `emitCss`
gains a `properties` option to handle them, configurably:
- `mode: 'emit'` — emit `@property` rules for referenced slots,
preserving Tailwind's typed defaults.
- `mode: 'inline'` — substitute each slot's `initial-value` into the
values that reference it (a superset of `inlineVars` for the matched
slots), so the output is fully self-contained.
- `resolve(name, captured)` hook — override or supply a slot's config
(initial-value / syntax / inherits), or register one Tailwind didn't.
- `match` — restrict handling to matching names (default `/^--tw-/`).
`tailwindPlugin` forwards `properties` through its `onCss` path. Adds 9
tests (capture, emit, inline, resolve override, match, back-compat,
plugin e2e). Compiler suite: 178 passing.
Introduce the build-time compiler for constrained-JSX skins, rebased onto
current main as a clean, additive package. Provides:
- core pipeline: parse, compile, generate, JSX runtime, define-component
- transforms: import rewriting, replace/wrap, drop-unused locals/imports
- matchers + react lowering (add-prop, child-as-prop)
- styles className analyzer
- tailwind subsystem: design-system loader, decompose, evaluator,
deriveClassName, emitCss, tailwindPlugin (three targets)
Self-contained: the integration smoke test now reads a vendored skin
fixture instead of the skins package, so the compiler builds and tests
green independently. 158 tests pass.
Wiring: register the project reference (tsconfig), commitlint scope,
CI test-matrix entry, and lockfile entries (lightningcss, tailwindcss).
The skin migration that consumes this compiler is parked separately —
its token refactor conflicts with skin work that landed on main; see the
follow-up commit and .claude/plans/compiler-rebase-audit.md.
Rahim