feat: bootstrap design kit and vaporwave demo baseline

kit/ai/claude/CLAUDE.template.md

@@ -0,0 +1,11 @@
+# {{ .project_name }} — Instructions for Claude
+
+Read and follow the project Bible before making any changes:
+
+**[`bible/README.md`](bible/README.md)**
+
+The Bible is the single source of truth for architecture, data models, API contracts, and UI
+pattern conventions.
+
+Every significant architectural decision must be recorded in the appropriate Bible decision log.
+

kit/ai/codex/AGENTS.template.md

@@ -0,0 +1,10 @@
+# {{ .project_name }} — Agent Instructions
+
+Read and follow `bible/README.md` as the architecture source of truth.
+
+## Rules
+
+- Keep architecture documentation in English.
+- Update Bible docs in the same change set as architecture/code contract changes.
+- Keep README and agent docs minimal; avoid duplicating Bible architecture content.
+

kit/ai/shared/ARCH_DOC_POLICY.md

@@ -0,0 +1,11 @@
+# Architecture Documentation Policy
+
+This project uses a Bible-style architecture documentation folder as the single source of truth.
+
+## Mandatory Rules
+
+- Record architecture decisions before or together with implementation.
+- Use English for architecture documentation.
+- Remove or update obsolete architectural guidance in the same change.
+- Keep non-Bible docs concise and reference the Bible instead of duplicating it.
+