diff --git a/CHANGELOG.md b/CHANGELOG.md
index 77478d7..4983325 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,40 @@ All notable changes to seismo-relay are documented here.
 
 ---
 
+## v0.22.0 — 2026-07-03
+
+Full-snapshot bundle support (SFM side).  Adds the DB-snapshot, recent-waveform,
+and gated-restore endpoints Terra-View drives to pull a complete prod→dev refresh
+— the `seismo_relay.db` plus the waveform files behind recent events — in one
+pass.  Pairs with **Terra-View v0.17.0**'s "Create full snapshot (incl. SFM)"
+control on Settings → Database.  New logic lives in `sfm/db_snapshot.py`, kept
+out of `server.py` so it's unit-testable without HTTP.
+
+### Added
+
+- **`GET /db/snapshot`** — streams a WAL-safe point-in-time copy of
+  `seismo_relay.db`, taken through the SQLite online backup API (not a raw
+  file grab), so the download stays consistent even while the ACH server is
+  writing under WAL.
+- **`GET /db/waveforms/recent.zip?n=…`** — zips the on-disk files (event file
+  + its `.h5` / sidecar siblings) for the *n* most-recent events, arcname
+  `<serial>/<filename>`, so a dev box can restore chart-openable events without
+  hauling the entire waveform store.  Events with no resolvable files on disk
+  are skipped.
+- **`POST /db/restore`** — gated by `SFM_DB_RESTORE_ENABLED` (dormant → 404
+  unless explicitly enabled; dev-only).  Validates the uploaded DB first, takes
+  a WAL-safe `.pre-restore-<ts>` safety backup of the current DB, then swaps in
+  the restored DB + waveforms.  Zip entries are path-traversal-guarded before
+  extraction.
+
+### Fixed
+
+- **Restore no longer blocks the event loop.**  `/db/restore` runs its
+  synchronous DB/file work in a threadpool instead of `async def`, so a large
+  restore can't stall inbound ACH connections or other API requests.
+
+---
+
 ## v0.21.1 — 2026-06-01
 
 Bug fixes against v0.21.0 surfaced after the first prod redeploy.  Three
diff --git a/README.md b/README.md
index 8d41f7e..791f0b3 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# seismo-relay  `v0.21.0`
+# seismo-relay  `v0.22.0`
 
 A ground-up replacement for **Blastware** — Instantel's aging Windows-only
 software for managing seismographs.  Supports both the **MiniMate Plus
@@ -54,6 +54,11 @@ over direct RS-232 or cellular modem (Sierra Wireless RV50 / RV55).
 > flow through the existing Event Report PDF pipeline without a
 > separate renderer.  Terra-View v0.13.0 ships in parallel and
 > closes Phase 1 of the SFM integration — see its CHANGELOG.
+> **v0.22.0 (2026-07-03)** adds the SFM side of the full-snapshot
+> bundle: `GET /db/snapshot` (WAL-safe DB copy), `GET /db/waveforms/
+> recent.zip` (recent events' waveform files), and a gated
+> `POST /db/restore` (`SFM_DB_RESTORE_ENABLED`, dev-only).  Terra-View
+> v0.17.0 drives them to pull a one-pass prod→dev refresh.
 > See [CHANGELOG.md](CHANGELOG.md) for full version history.
 
 ---
@@ -210,6 +215,18 @@ optionally paired with their ASCII sidecar reports; both dedup by
 | `POST` | `/db/import/blastware_file` | Series III: `.AB0*` / `.N00` binaries + paired `_ASCII.TXT`.  Source: `series3-watcher`. |
 | `POST` | `/db/import/idf_file` | Series IV: `.IDFH` / `.IDFW` binaries + paired `.IDFW.txt` / `.IDFH.txt`.  Source: `thor-watcher`. |
 
+### DB snapshot / restore endpoints
+
+Back the "full snapshot bundle" prod→dev refresh Terra-View orchestrates
+(Settings → Database).  Snapshot/zip are read-only; restore is gated and
+dev-only.
+
+| Method | URL | Description |
+|--------|-----|-------------|
+| `GET` | `/db/snapshot` | WAL-safe point-in-time copy of `seismo_relay.db` via the SQLite online backup API. |
+| `GET` | `/db/waveforms/recent.zip?n=…` | Zips the on-disk files (event file + `.h5` / sidecars) for the *n* most-recent events. |
+| `POST` | `/db/restore` | Validate-first restore of an uploaded DB + waveforms; takes a WAL-safe pre-restore safety backup, path-traversal-guards the zip.  Gated by `SFM_DB_RESTORE_ENABLED` (dormant → 404). |
+
 ---
 
 ## minimateplus library
diff --git a/pyproject.toml b/pyproject.toml
index dafdc73..313e73d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "seismo-relay"
-version = "0.21.1"
+version = "0.22.0"
 description = "Python client and REST server for MiniMate Plus seismographs"
 requires-python = ">=3.10"
 dependencies = [