150 lines
8.1 KiB
Markdown
150 lines
8.1 KiB
Markdown
---
|
|
phase: 41-diagrams-icons-theme-engine
|
|
plan: "03"
|
|
subsystem: server
|
|
tags: [culori, oklch, wcag-contrast, theme-engine, nexus-settings, tdd]
|
|
|
|
# Dependency graph
|
|
requires:
|
|
- phase: 41-01
|
|
provides: types.ts with RenderResult/ThemePaletteBundle/PaletteRole interfaces, server deps (culori, wcag-contrast)
|
|
provides:
|
|
- server/src/services/renderers/theme-renderer.ts — OKLCH palette engine with WCAG validation and 4 export formatters
|
|
- server/src/__tests__/theme-renderer.test.ts — 32 tests covering palette gen, WCAG, export formats
|
|
- server/src/services/nexus-settings.ts — extended schema with customTheme field
|
|
- server/src/__tests__/nexus-settings-custom-theme.test.ts — 13 tests for schema validation and persistence
|
|
affects: [41-05-ui-generator, 41-06-ui-theme]
|
|
|
|
# Tech tracking
|
|
tech-stack:
|
|
added:
|
|
- "@types/culori@^4.0.1"
|
|
- "@types/wcag-contrast@^3.0.3"
|
|
patterns:
|
|
- "OKLCH palette engine: converter('oklch') + formatHex from culori, no HSL intermediates"
|
|
- "WCAG AA: wcagContrast.hex(roleHex, textHex) >= 4.5; text role always true"
|
|
- "7-role palette: background/surface/overlay/text/accent-1/accent-2/accent-3 with dark+light OKLCH L,C,H params"
|
|
- "nexusSettingsService set() is a partial merge — set({ customTheme: undefined }) clears the field"
|
|
|
|
key-files:
|
|
created:
|
|
- server/src/services/renderers/theme-renderer.ts
|
|
- server/src/__tests__/theme-renderer.test.ts
|
|
- server/src/__tests__/nexus-settings-custom-theme.test.ts
|
|
- server/src/services/renderers/types.ts (prerequisite, from 41-01)
|
|
- server/src/services/nexus-settings.ts (prerequisite, from 41-01)
|
|
modified:
|
|
- server/package.json (added @types/culori, @types/wcag-contrast devDeps)
|
|
- pnpm-lock.yaml
|
|
|
|
key-decisions:
|
|
- "Types.ts and nexus-settings.ts created as prerequisites in this worktree (Phase 41-01 work was on separate branch)"
|
|
- "@types/culori and @types/wcag-contrast installed as devDeps to satisfy tsc --noEmit without TS7016 errors"
|
|
- "Text role wcagAA is always true — it IS the text color, not measured against itself"
|
|
- "Accent colors (accent-1/2/3) correctly report wcagAA: false — these are decorative, not text-on-background pairs"
|
|
|
|
# Metrics
|
|
duration: 20min
|
|
completed: 2026-04-04
|
|
---
|
|
|
|
# Phase 41 Plan 03: OKLCH Theme Palette Engine Summary
|
|
|
|
**OKLCH palette engine with 7-role dark/light generation from a single hex seed, WCAG AA validation via culori+wcag-contrast, four export formatters (CSS custom props, Tailwind config, VS Code theme, JSON), and nexus-settings.json extended with customTheme persistence**
|
|
|
|
## Performance
|
|
|
|
- **Duration:** ~20 min
|
|
- **Started:** 2026-04-04T20:38:00Z
|
|
- **Completed:** 2026-04-04T20:44:00Z
|
|
- **Tasks:** 2
|
|
- **Files modified:** 7
|
|
|
|
## Accomplishments
|
|
|
|
- `buildPalette(seedHex)`: produces 7 PaletteRole objects (background, surface, overlay, text, accent-1, accent-2, accent-3) with dark and light OKLCH variants. Hue extracted from seed via `converter("oklch")`, L and C values are fixed per role (dark: bg 0.14/0.01 → text 0.93/0.008 → accent-1 0.72/0.15; light: bg 0.94/0.005 → text 0.28/0.008 → accent-1 0.55/0.16).
|
|
- WCAG AA computed per variant: non-text roles checked via `wcagContrast.hex(roleHex, textHex) >= 4.5`; text role always `true`.
|
|
- Zero HSL intermediate usage — all color math in OKLCH via culori.
|
|
- `exportToCss(palette, variant)`: `:root { --background: oklch(...); --foreground: oklch(...); ... }` with role-to-token mapping.
|
|
- `exportToTailwind(palette)`: `module.exports = { theme: { extend: { colors: { dark: {...}, light: {...} } } } }` snippet.
|
|
- `exportToVSCode(palette)`: JSON with `editor.background`, `editor.foreground`, `activityBar.background`, `sideBar.background`, `statusBar.background`, `tab.activeBackground`, etc.
|
|
- `exportToJson(palette)`: `{ palette, generated: ISO_DATE }` structured JSON.
|
|
- `renderThemePalette({ seedHex })`: returns `RenderResult` with `contentType: "application/json"` and `ThemePaletteBundle` as JSON buffer.
|
|
- `nexusSettingsSchema` extended with optional `customTheme: { seedHex, palette: PaletteRole[] }` using Zod.
|
|
- `nexusSettingsService()` set/get correctly persists and retrieves `customTheme` to/from `nexus-settings.json`.
|
|
|
|
## Task Commits
|
|
|
|
1. **TDD RED — failing tests** - `13aa575c` (test)
|
|
2. **Task 1: OKLCH palette engine** - `5430a4bf` (feat)
|
|
3. **Task 2: nexus-settings customTheme** - `bab7f42b` (feat)
|
|
|
|
## Files Created/Modified
|
|
|
|
- `server/src/services/renderers/theme-renderer.ts` — Full OKLCH palette engine with 4 export formatters (208 lines)
|
|
- `server/src/__tests__/theme-renderer.test.ts` — 32 TDD tests covering all behaviors
|
|
- `server/src/services/nexus-settings.ts` — Extended schema with customTheme (prerequisite)
|
|
- `server/src/__tests__/nexus-settings-custom-theme.test.ts` — 13 tests for schema + persistence
|
|
- `server/src/services/renderers/types.ts` — Shared bundle interfaces (prerequisite)
|
|
- `server/package.json` — Added culori, wcag-contrast runtime deps + @types devDeps
|
|
- `pnpm-lock.yaml` — Updated lockfile
|
|
|
|
## Decisions Made
|
|
|
|
- Created types.ts and nexus-settings.ts as prerequisites in this worktree — Phase 41-01 work existed only on the parallel `gsd/phase-41-diagrams-icons-theme-engine` branch which had merge conflicts with this worktree's branch.
|
|
- Added `@types/culori@^4.0.1` and `@types/wcag-contrast@^3.0.3` as devDeps — culori v4 does not ship TypeScript declarations, causing TS7016 errors under `strict: true`. The @types packages resolve this and are aligned with the installed versions.
|
|
- `text` role `wcagAA` is hardcoded `true` — the text color IS the reference for contrast measurement; checking it against itself is undefined behavior.
|
|
- Accent color `wcagAA: false` is correct and expected — accent-1/2/3 at the specified OKLCH L/C values don't reach 4.5:1 against text; they are decorative palette swatches, not body text colors.
|
|
|
|
## Deviations from Plan
|
|
|
|
### Auto-fixed Issues
|
|
|
|
**1. [Rule 3 - Blocking] Created prerequisite files missing from this worktree**
|
|
|
|
- **Found during:** Task 1 (TDD setup)
|
|
- **Issue:** This worktree's branch (`worktree-agent-ad15b85d`) diverged from `gsd/phase-41-diagrams-icons-theme-engine` with merge conflicts. The foundation files from Plan 41-01 (types.ts, nexus-settings.ts) were absent.
|
|
- **Fix:** Created the prerequisite files directly from the Phase 41 branch content — types.ts (shared interfaces) and nexus-settings.ts (base schema). Installed culori, wcag-contrast, @types/culori, @types/wcag-contrast in server/package.json.
|
|
- **Files modified:** server/src/services/renderers/types.ts (new), server/src/services/nexus-settings.ts (new), server/package.json, pnpm-lock.yaml
|
|
- **Committed in:** 13aa575c (TDD RED commit)
|
|
|
|
---
|
|
|
|
**Total deviations:** 1 auto-fixed (Rule 3 - blocking prerequisite)
|
|
**Impact on plan:** Resolved cleanly. All plan goals met. Zero added scope — only files mandated by plan frontmatter were created.
|
|
|
|
## Known Stubs
|
|
|
|
None — all exported functions are fully implemented. `renderThemePalette` is complete and returns real data.
|
|
|
|
## Issues Encountered
|
|
|
|
- Pre-existing TypeScript errors in server/src (unrelated files: app.ts, middleware/auth.ts, routes/access.ts etc.) are out-of-scope pre-existing issues. Server TSC passes cleanly for all new files.
|
|
|
|
## User Setup Required
|
|
|
|
None.
|
|
|
|
## Next Phase Readiness
|
|
|
|
- `renderThemePalette` is ready for consumption by Plan 41-05 (UI generator) and 41-06 (UI theme)
|
|
- `nexusSettingsService().set({ customTheme: { seedHex, palette } })` ready for the theme picker UI to persist user selections
|
|
- All 45 new tests pass; no regressions introduced
|
|
|
|
## Self-Check: PASSED
|
|
|
|
- FOUND: server/src/services/renderers/theme-renderer.ts
|
|
- FOUND: server/src/__tests__/theme-renderer.test.ts
|
|
- FOUND: server/src/services/nexus-settings.ts
|
|
- FOUND: server/src/__tests__/nexus-settings-custom-theme.test.ts
|
|
- FOUND: .planning/phases/41-diagrams-icons-theme-engine/41-03-SUMMARY.md
|
|
- FOUND commit: 13aa575c (test - TDD RED)
|
|
- FOUND commit: 5430a4bf (feat - Task 1 palette engine)
|
|
- FOUND commit: bab7f42b (feat - Task 2 nexus-settings)
|
|
- FOUND commit: 234e3b74 (docs - final metadata)
|
|
- All 45 tests pass (32 theme-renderer + 13 nexus-settings-custom-theme)
|
|
- No TypeScript errors in new files
|
|
|
|
---
|
|
*Phase: 41-diagrams-icons-theme-engine*
|
|
*Completed: 2026-04-04*
|