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v0.3.0 — Legibility
Pre-release
Pre-release
Steps 1–3: Existence → Multiplicity → Legibility
First working release of Klatch. Built in a single session.
What works
- Channel-based conversations with custom system prompts
- Streaming Claude responses via SSE (POST + SSE pattern)
- SQLite persistence — conversations survive restarts
- Channel sidebar — create, switch, independent histories
- Markdown rendering — syntax-highlighted code blocks, copy button, formatted text
- Opus 4.6 by default
Tech stack
Vite + React 19 · Hono · SQLite (better-sqlite3) · Tailwind CSS v4 · Anthropic SDK
Quick start
git clone git@github.com:Design-in-Product/klatch.git
cd klatch && echo 'ANTHROPIC_API_KEY=your-key' > .env
npm install && npm run dev