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/SESSION.md

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+# SESSION.md -- Persistent AI Session Memory
+
+## What this file is for
+
+This is a **persistent memory file** -- it accumulates decisions, discoveries, and context across AI coding sessions so the assistant doesn't start cold each time.
+
+It is **not** a chat transcript.
+It is **not** static documentation of how something works.
+It is a living record of *why things are the way they are*, plus a map to the right context files.
+
+---
+
+## Project Summary
+
+<One paragraph: What is this project? What problem does it solve?>
+
+## Context Files
+
+- `./CLAUDE.md` -- project instructions and architecture
+- `./CONTEXT.md` -- infrastructure and deployment details
+- `./README.md` -- project overview
+
+## Session Notes
+
+Group entries by topic, not by date. Update the relevant section rather than appending raw timestamped blocks.
+
+### Infrastructure decisions
+
+<Decisions about hosting, deployment, dependencies, architecture.>
+
+### Bug fixes & discoveries
+
+<Problems found and how they were resolved. Include the "why" so the fix makes sense later.>
+
+### Open threads
+
+- [ ] <Things that need to be done but haven't been started yet>
+- [ ] <Known issues that aren't blocking but should be addressed>