init: scaffold Seth-Workflow-April-2026

User-agnostic, shareable AI-assisted development workflow distilled from
26+ real projects. Includes 9 composable rules, 4 project templates,
pre-push secret scanning hook, 3 methodology guides, and customization docs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

templates/CLAUDE.md

@@ -0,0 +1,54 @@
+# <Project Name>
+
+> <One-line description of the project.>
+
+## Start Here
+
+1. Read this file for project state and architecture
+2. Check `.claude/sessions/` for the latest session handoff
+3. Read SESSION.md for accumulated decisions and discoveries
+
+## Project State
+
+- **Phase:** <IDEATION | PLANNING | BUILDING | REVIEW | SHIPPING>
+- **Branch:** <current active branch>
+- **Tests:** <number passing, or "none yet">
+- **Deployment:** <where it runs, or "local only">
+
+## Architecture
+
+<High-level description of how the system works. Key components and how they connect.>
+
+### Key Files
+
+| File | Role |
+|------|------|
+| <path> | <what it does> |
+
+## Infrastructure
+
+<Deployment target, services, ports, URLs.>
+See `CONTEXT.md` for detailed infrastructure facts.
+
+## Conventions
+
+- Conventional commits: `feat:`, `fix:`, `docs:`, `refactor:`, `test:`, `chore:`
+- <Any project-specific conventions>
+
+## Credentials
+
+All credentials are in `.env` (gitignored, never committed).
+**Never inline credentials in code, docs, or messages.**
+
+## Development
+
+```bash
+# Setup
+<setup commands>
+
+# Run
+<run commands>
+
+# Test
+<test commands>
+```