diff --git a/docs/decisions/0016-accessibility-baseline-wcag-aa-targeted-aaa.md b/docs/decisions/0016-accessibility-baseline-wcag-aa-targeted-aaa.md
index 5e25280..ccc819f 100644
--- a/docs/decisions/0016-accessibility-baseline-wcag-aa-targeted-aaa.md
+++ b/docs/decisions/0016-accessibility-baseline-wcag-aa-targeted-aaa.md
@@ -99,10 +99,12 @@ Preferences are saved per user; an unauthenticated default is read from browser
 
 ### Component stack
 
-**Angular CDK + spartan-ng + TailwindCSS**. See [`notes/argumentaire-stack-ui-spartan-cdk-tailwind.md`](../notes/argumentaire-stack-ui-spartan-cdk-tailwind.md) for the full rationale produced for the dev team. Summary:
+**Angular CDK + TailwindCSS, with spartan-ng-style components written in-house** (the spartan-ng _library_ is deferred — see amendment below). See [`notes/argumentaire-stack-ui-spartan-cdk-tailwind.md`](../../notes/argumentaire-stack-ui-spartan-cdk-tailwind.md) for the original rationale; the design philosophy (headless primitives + Tailwind utility CSS + copy-paste components under our own control) is unchanged. Summary:
+
+> **Amended on 2026-04-30** — Adoption of the spartan-ng package itself is deferred. At the time of scaffolding (2026-04-30), `@spartan-ng/brain` and `@spartan-ng/cli` were still at version `0.0.1-alpha.681`, which trips the project rule against pre-1.0 dependencies. The mitigation is to apply the spartan-ng _philosophy_ (headless primitives on Angular CDK + Tailwind utility CSS + copy-paste components owned in-source) without depending on the lib. Components for v1 are written in-house, in `libs/shared/ui`, on Angular CDK directly. spartan-ng adoption is revisited when the lib reaches `1.0.0`.
 
 - **Angular CDK** (`@angular/cdk`) — primitives accessibility layer maintained by Google's Angular Material team. Equivalent role to Radix UI in React. Provides `Overlay`, `FocusTrap`, `FocusMonitor`, `LiveAnnouncer`, `A11yModule`, `ListKeyManager`, `Drag and Drop`, etc. Battle-tested since 2017.
-- **spartan-ng** (https://www.spartan.ng/) — copy-paste component layer built on Angular CDK, styled with Tailwind. Components are checked into our repo (`libs/shared/ui/`) and modified freely. Equivalent role to shadcn/ui in React.
+- ~~**spartan-ng**~~ _(deferred — see amendment above)_. Components are written in-house in `libs/shared/ui/`, on Angular CDK, copy-paste-style. The spartan-ng project is consulted for _design inspiration_ (component patterns, ARIA usage, theming approach) without taking the dependency.
 - **Tailwind CSS** — utility-first styling. Tokens for colour, spacing, contrast tiers live in `libs/shared/tokens/`. The contrast tiers map directly to the user preference modes above.
 
 Angular Material is **rejected** because its visual design system (Material Design) is opinionated in ways that clash with both APF branding and the multi-tier contrast requirements. React-ecosystem libraries (shadcn/ui, dice-ui, animate-ui) are rejected as incompatible with the Angular stack ([ADR-0004](0004-frontend-stack-angular-csr-zoneless-signals.md)).