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CHANGELOG.md

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+# Changelog — template-vertical
+
+All notable changes to this template at the root level. Per-feature changelogs live at `packages/<feature>/CHANGELOG.md`.
+
+This file is maintained by [release-please](https://github.com/googleapis/release-please) — do not edit manually. Edits land via the rolling release PR triggered by merges to `main`. See [ADR-021](./docs/decisions/adr-021-versioning-and-changelog.md) for the architecture and [`docs/guides/releasing.md`](./docs/guides/releasing.md) for the day-to-day reference.
+
+## 0.1.0 (2026-05-13)
+
+### Initial baseline
+
+- Hybrid versioning established (ADR-021): root template + 5 feature packages each version independently.
+- Conventional Commits required for every commit (CLAUDE.md Key Conventions).
+- Coverage architecture shipped (ADR-020): L0 vitest thresholds, L1 `pnpm coverage:diff`, L2 `pnpm coverage:aggregate`, L3 `pnpm mutate`.
+- Manifest-driven coverage bands in every `feature.manifest.ts`.
+- Sandcastle agent orchestration (ADR-019) + PRD-lifecycle automation (`pnpm work prd-ship`).
+- 5 features (auth / blog / media / marketing-pages / navigation) all green on declared L0 bands.
+
+Future entries appear above this section as release-please assembles them from conventional commits since the last release.