docs: add design system session continuation prompt to README

Priming prompt for new Claude Code sessions to pick up the
design system redesign plan from any phase.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Dev User

README.md

@@ -79,6 +79,37 @@ To start the remediation workflow:
 /speckit.workflow Fix E2E test failures: 27 CRITICAL (auth failures blocking 51% of tests), 65 HIGH (feature-specific). Primary root cause is authentication not persisting - tests show "Sign In" link when auth expected. Secondary issue is cookie banner blocking 95% of tests. See docs/specs/e2e-remediation/analysis-report.md
 ```
 
+## Design System Redesign
+
+Custom SpokeToWork theme (dark default + light variant) built on the existing DaisyUI/Tailwind stack. Storybook upgrade to v10, then bottom-up component reskin.
+
+**Design doc**: [docs/plans/2026-02-13-design-system-redesign.md](./docs/plans/2026-02-13-design-system-redesign.md)
+**Implementation plan**: [docs/plans/2026-02-13-design-system-implementation.md](./docs/plans/2026-02-13-design-system-implementation.md)
+
+### Session Continuation Prompt
+
+```
+Read these files to pick up the design system redesign:
+
+1. CLAUDE.md - Project rules, Docker setup, coding standards
+2. docs/plans/2026-02-13-design-system-redesign.md - Approved design (colors, aesthetic, constraints)
+3. docs/plans/2026-02-13-design-system-implementation.md - Task-by-task plan
+4. docs/STORYBOOK_NOTES.md - Current Storybook state (needs v10 upgrade)
+5. src/app/globals.css - Current theme config, DaisyUI plugin block, typography system
+
+Use superpowers:executing-plans to work through the implementation plan.
+Start at Phase 1 Task 1 (or wherever the plan left off).
+
+Key context:
+- Everything runs inside Docker: docker compose exec spoketowork <command>
+- pnpm, not npm
+- DaisyUI beta with Tailwind v4 CSS-first config (@plugin syntax)
+- Brand colors: orange #E67E22 (primary), cyan #00d9ff (secondary), green #22c55e (accent), navy #132a4e (base)
+- Dark theme default, light variant available
+- Preserve all existing accessibility work (WCAG touch targets, ARIA patterns, colorblind filters)
+- Aesthetic: mission with personality. Headspace-like. Not silly, not corporate.
+```
+
 ## License
 
 MIT - See [LICENSE](./LICENSE)