chore(template): clean-slate template snapshot from bb4a0c7

Curated, product-agnostic snapshot of the post-story-04 tree: demo
content deleted, auth-only reference feature, web-next shell, all gates
green. Product-specific docs, ADRs 027-029, PRDs/epics/archive, editor
library traces, and product naming are curated out; generic template
repairs (coverage provider devDeps, root test:coverage script, live
lint fixes, root-only release-please) are kept. See TEMPLATE.md for
provenance, curation list, and usage.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016j8z4VHjedXDTjEDNg7qHK

.claude/hooks/session-start.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# Tier 2 — surfaces a fresh session's "where to look first" pointers.
+# Output on stdout is injected as additional context.
+
+cat <<'EOF'
+=== template-vertical session pointers ===
+Canonical vocabulary: docs/glossary.md  (resolve "what does X mean here?" first)
+Architecture: AGENTS.md, docs/architecture/overview.md, docs/architecture/agent-first-workflow-and-conformance.md
+Workflow: pnpm work status | pnpm work next | pnpm work dispatch (ADR-019)
+Generator-first: pnpm turbo gen <kind> beats hand-rolled scaffolding (non-negotiable)
+Conformance: pnpm conformance + pnpm fallow (5-gate drift detection)
+Conventional Commits (non-negotiable): <type>(<scope>): <subject> — see CLAUDE.md Key Conventions
+Releases: release-please reads commits + opens rolling release PR on merge to main (ADR-021)
+Skills: to-prd, grill-with-docs, grill-me, handoff, improve-codebase-architecture, evaluate-library (.claude/skills/)
+EOF
+
+exit 0