feat(adapter): plain-css second-adapter smoke — proves the IR seam (WHYNOT-WP-0002 T10)

A deliberately-unfinished second adapter that consumes the same ir/ and honours
the same adapters/ADAPTER_CONTRACT.md (token full-gen + write-once stubs + drift
roll-up shape + exit codes), with zero changes to ir/. Every IR component is
'new' for a fresh stack → 10 class stubs + tokens.css (80 props). Not a usable
plain-CSS kit — the deliverable is confidence the boundary holds so the
architecture can be lifted into a coulomb-level tool later. make adapt-plain-css.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

adapters/plain-css/stubs/wn-button.css

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+/* @generated STUB by adapters/plain-css (T10) from ir/components/Button.json — write-once. */
+/* Button: Button — extracted from designbook ui_kits/whynot-control/Atoms.jsx. */
+.wn-button { /* TODO: base appearance per ir/exemplars/Button.html */ }
+.wn-button--secondary { /* variant=secondary */ }
+.wn-button--primary { /* variant=primary */ }
+.wn-button--ghost { /* variant=ghost */ }

adapters/plain-css/stubs/wn-eyebrow.css

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+/* @generated STUB by adapters/plain-css (T10) from ir/components/Eyebrow.json — write-once. */
+/* Eyebrow: Eyebrow — extracted from designbook ui_kits/whynot-control/Atoms.jsx. */
+.wn-eyebrow { /* TODO: base appearance per ir/exemplars/Eyebrow.html */ }

adapters/plain-css/stubs/wn-icon.css

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+/* @generated STUB by adapters/plain-css (T10) from ir/components/Icon.json — write-once. */
+/* Icon: Icon — extracted from designbook ui_kits/whynot-control/Atoms.jsx. */
+.wn-icon { /* TODO: base appearance per ir/exemplars/Icon.html */ }

adapters/plain-css/stubs/wn-page-header.css

@@ -0,0 +1,3 @@
+/* @generated STUB by adapters/plain-css (T10) from ir/components/PageHeader.json — write-once. */
+/* PageHeader: PageHeader — extracted from designbook ui_kits/whynot-control/Chrome.jsx. */
+.wn-page-header { /* TODO: base appearance per ir/exemplars/PageHeader.html */ }

adapters/plain-css/stubs/wn-pipeline-strip.css

@@ -0,0 +1,3 @@
+/* @generated STUB by adapters/plain-css (T10) from ir/components/PipelineStrip.json — write-once. */
+/* PipelineStrip: PipelineStrip — extracted from designbook ui_kits/whynot-control/Chrome.jsx. */
+.wn-pipeline-strip { /* TODO: base appearance per ir/exemplars/PipelineStrip.html */ }

adapters/plain-css/stubs/wn-sidebar.css

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+/* @generated STUB by adapters/plain-css (T10) from ir/components/Sidebar.json — write-once. */
+/* Sidebar: Sidebar — extracted from designbook ui_kits/whynot-control/Chrome.jsx. */
+.wn-sidebar { /* TODO: base appearance per ir/exemplars/Sidebar.html */ }
+.wn-sidebar--doc: { /* current=doc: */ }

adapters/plain-css/stubs/wn-stage-dot.css

@@ -0,0 +1,3 @@
+/* @generated STUB by adapters/plain-css (T10) from ir/components/StageDot.json — write-once. */
+/* StageDot: StageDot — extracted from designbook ui_kits/whynot-control/Atoms.jsx. */
+.wn-stage-dot { /* TODO: base appearance per ir/exemplars/StageDot.html */ }

adapters/plain-css/stubs/wn-stamp.css

@@ -0,0 +1,3 @@
+/* @generated STUB by adapters/plain-css (T10) from ir/components/Stamp.json — write-once. */
+/* Stamp: Stamp — extracted from designbook ui_kits/whynot-control/Atoms.jsx. */
+.wn-stamp { /* TODO: base appearance per ir/exemplars/Stamp.html */ }

adapters/plain-css/stubs/wn-tag.css

@@ -0,0 +1,3 @@
+/* @generated STUB by adapters/plain-css (T10) from ir/components/Tag.json — write-once. */
+/* Tag: Tag — extracted from designbook ui_kits/whynot-control/Atoms.jsx. */
+.wn-tag { /* TODO: base appearance per ir/exemplars/Tag.html */ }

adapters/plain-css/stubs/wn-top-nav.css

@@ -0,0 +1,3 @@
+/* @generated STUB by adapters/plain-css (T10) from ir/components/TopNav.json — write-once. */
+/* TopNav: TopNav — extracted from designbook ui_kits/whynot-control/Chrome.jsx. */
+.wn-top-nav { /* TODO: base appearance per ir/exemplars/TopNav.html */ }