Triage the three surfaced divergences the governance-correct way (no stack->React back-edit, no ir/ hand-edit); make adapt-lit/parity-lit/designbook-refresh now exit 0: - PipelineStrip: documented TAG_OVERRIDES in scripts/ir-extract.mjs maps the React 'PipelineStrip' to the established tag wn-pipeline (the web-component tag is an IR-projection detail, not React-dictated; the component name stays faithful). Tag now matches the element; parity tests it (no longer skipped). - PageHeader.actions: the drift detector now collects each element's named slots and treats an IR prop honoured by a same-named slot (<slot name="actions">) as satisfied (prop-via-slot, informational) rather than prop-missing. - Sidebar.current: recorded as an auditable accepted divergence in adapters/lit/drift.accepted.json (React monolithic 'current' key vs Lit per-item 'active' on composable <wn-sidebar-item>) — listed, downgraded to info, not gated. Rendered surfaces (src/, examples/) untouched — verified zero diff; parity renders all 10 components green. Adapt/parity outputs idempotent (stable re-run). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
plain-css adapter — second-adapter smoke (WHYNOT-WP-0002 · T10)
This is not a finished stack. It exists to prove the IR/adapter boundary: that a second, non-Lit adapter can consume the same
ir/and honour the sameadapters/ADAPTER_CONTRACT.md. The deliverable is confidence in the seam, so the architecture can later be lifted into a coulomb-level tool — not a usable plain-CSS component kit.
Run with make adapt-plain-css (adapters/plain-css/adapt.mjs).
What it proves
| Contract concern | This adapter | Same as Lit? |
|---|---|---|
Input is ir/ only |
reads ir/tokens.json + ir/components/*.json |
✓ identical inputs |
| Tokens fully generated | → adapters/plain-css/tokens.css (CSS custom properties, deterministic no-op re-run) |
✓ same discipline, different target |
| New component → stub | write-once class stub adapters/plain-css/stubs/<tag>.css (base + variant modifier classes from the contract) |
✓ write-once, into a staging dir |
| Drift roll-up | adapters/plain-css/_report.json in the contract's report shape (stack, generatedAt, components[]) |
✓ portable shape |
| Exit codes | 0 ok · 2 usage · 3 new/drift · 5 internal |
✓ shared convention |
Because plain-CSS has no hand-authored source, every IR component reports
status: "new" and gets a stub — exactly the contract's new-component path. That a
totally different stack reuses the same IR, the same report shape, and the same exit
codes — with zero changes to ir/ — is the proof the boundary holds.
What it deliberately does NOT do
No real CSS appearance, no parity, no full component set, no integration into the
repo's build. Finishing a plain-CSS (or Vue/Svelte/…) stack is future work; the seam
is what T10 validates. See DesignSystemIntroduction.md §5.1 and the Lit reference
adapter (adapters/lit/) for the full implementation.