kandev/docs/plans/task-layout-profiles/task-02-layout-profile-domain.md

id, title, status, wave, depends_on, plan, spec

id	title	status	wave	depends_on	plan	spec
02-layout-profile-domain	Layout profile domain	done	1		plan.md	../../specs/ui/requirements/task-layout-profiles.md

Task 02: Layout Profile Domain

Acceptance

• Pure helpers define built-in templates, validate reusable layouts, resolve the effective default, and perform immutable profile mutations.
• Editor-created layouts allow exactly one Agent and at most one of each reusable optional panel, with no empty groups.
• Invalid or legacy layouts are identified without mutating their stored payloads.

Files likely touched

• apps/web/lib/layout/layout-profiles.ts
• apps/web/lib/layout/layout-profiles.test.ts
• apps/web/lib/state/layout-manager/constants.ts
• apps/web/components/task/layout-preset-selector.tsx

Dependencies

None.

Inputs

• Spec What, Data model, and legacy failure-mode requirements.
• Existing LayoutState, PANEL_REGISTRY, getPresetLayout, and SavedLayout types.

Verification

pnpm --filter @kandev/web test -- --run lib/layout/layout-profiles.test.ts

Run from apps.

Output contract

Report helper contracts, tests run, files changed, blockers, and risks; mark this task and its plan item done.