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cadence-ui/docs/exec-plans/2026-03-25-segmented-control.md
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# Segmented Control
- Status: `completed`
- Owner: `codex`
- Date: `2026-03-25`
## Goal
Add a compact `SegmentedControl` component to `@ai-ui/ui` for lightweight dashboard-style view
switching so consumers do not need to stretch `Tabs` into every small top-of-panel toggle.
## Scope
- In scope:
- add a new `SegmentedControl` component to `packages/ui`
- expose the component from the package entrypoint
- add unit coverage for controlled/uncontrolled behavior and stable contract hooks
- add Storybook docs that explain when to choose `SegmentedControl` instead of `Tabs`
- update the revenue dashboard story to use the new control for its contribution switcher
- refresh `registry/index.json` so source-copy consumers can install the new component
- Out of scope:
- redesigning the existing `Tabs` API
- replacing every current `Tabs` usage across docs
- adding icon-only, multi-select, or overflow handling variants in the first pass
## Constraints
- Keep the API narrower than `Tabs`; this should solve lightweight switching, not become another
generic navigation primitive.
- Reuse the current token and motion language from `DESIGN.md` instead of introducing a new visual
style.
- Preserve stable `data-slot` and `data-*` hooks for docs and tests.
- Do not add a new dependency if the existing Radix stack is sufficient.
## Affected Surfaces
- `docs/exec-plans/2026-03-25-segmented-control.md`
- `packages/ui/src/components/segmented-control.tsx`
- `packages/ui/src/components/segmented-control.variants.ts`
- `packages/ui/src/components/segmented-control.test.tsx`
- `packages/ui/src/index.ts`
- `apps/docs/src/components/segmented-control.stories.tsx`
- `apps/docs/src/revenue-dashboard.stories.tsx`
- `registry/index.json`
## Plan
1. Add the execution plan and confirm the public contract for a compact single-select control.
2. Implement `SegmentedControl` in `packages/ui` with stable slots, disabled state, and controlled
or uncontrolled value support.
3. Add Storybook docs that explain the intended usage boundary against `Tabs`.
4. Replace the revenue dashboard contribution switcher with `SegmentedControl` to prove the
dashboard-friendly use case.
5. Run targeted validation and refresh registry metadata.
## Validation
- `pnpm test -- --runInBand segmented-control tabs`
- `pnpm harness:validate:docs`
- `pnpm registry:build`
## Orchestration Task Sketch
- `T1`: implement `SegmentedControl` source, variants, and exports
- `T2 -> T1`: add docs stories and migrate the revenue dashboard example
- `T3 -> T1`: add tests and refresh registry metadata
## Status Log
- `2026-03-25 20:07` Read the system-of-record files and confirmed that `Tabs` is currently the only compact peer-switching primitive in the public surface.
- `2026-03-25 20:18` Started the segmented-control slice to cover lightweight dashboard toggles without expanding the `Tabs` API.
- `2026-03-25 23:32` Shipped the new `SegmentedControl`, migrated the revenue dashboard contribution switcher, refreshed `registry/index.json`, and cleared the existing `InputGroup` type blocker so build and docs validation could pass again.