--- title: "Session: dark-mode-toggle — 2026-04-01" type: source tags: [claude-code, session-transcript, demo] date: 2026-04-01 source_file: raw/sessions/demo-blog-engine/2026-04-01-dark-mode-toggle.md sessionId: demo-000000000000000000000000000004 slug: dark-mode-toggle project: demo-blog-engine started: 2026-04-01T15:00:00+00:00 ended: 2026-04-01T16:15:00+00:00 cwd: /Users/demo/code/demo-blog-engine gitBranch: feat/dark-mode permissionMode: default model: claude-haiku-4-5 user_messages: 3 tool_calls: 8 tools_used: [Read, Edit, Write] tool_counts: {"Edit": 4, "Read": 2, "Write": 2} token_totals: {"input": 3800, "cache_creation": 6000, "cache_read": 15000, "output": 1900} turn_count: 3 hour_buckets: {"2026-04-01T15": 6, "2026-04-01T16": 2} duration_seconds: 4500 is_subagent: false --- # Session: dark-mode-toggle — 2026-04-01 **Project:** `demo-blog-engine` · **Branch:** `feat/dark-mode` · **Mode:** `default` · **Model:** `claude-haiku-4-5` ## Summary Added a dark-mode toggle using CSS custom properties and `prefers-color-scheme`. The toggle writes to `localStorage` so the choice persists across navigations. ## Conversation ### Turn 1 — User Add a dark mode toggle. Should respect system preference by default but override on click. ### Turn 1 — Assistant Using `data-theme` on `` and swapping CSS custom properties. The toggle button writes `localStorage.setItem('theme', next)`, and a tiny inline script in `` reads it before first paint to avoid a flash. **Tools used in this turn:** - `Edit`: `public/style.css` — added `[data-theme="dark"]` vars - `Write`: `templates/theme-init.html` (5-line preview) - `Edit`: `templates/base.html` — included the init snippet ## Connections - [[demo-blog-engine]] — project - [[DarkMode]] — concept - [[CSSCustomProperties]] — concept