Remove Google Sheets mirror entirely (#13)

Postgres is now the sole source of truth: delete sheets.py and
import_from_sheets.py, strip mirror_entity/mirror_async/_mirror_worker and
POST /api/sync from app.py, drop the tab/mirror keys from db.py's TABLES.
Re-point n8n/renewal-reminder.json at the CRM's own HTTP API (GET
/api/clients, POST /api/activity_log) instead of the Sheets nodes, and drop
SHEET_ID/GOOGLE_SA_JSON from deploy env/compose and requests from
requirements.txt (PyJWT stays — still used by booking_api.py). Updates
docs/README/playbooks accordingly and closes the old #5 (atomic mirror) as
moot.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Documentation.md

@@ -23,15 +23,15 @@ every client regardless of tier.
                          │                Postgres (smb-db)            │
                          │  clients · leads · projects · bookings ·    │
                          │  invoices · activity_log · credentials —    │
-                         │  SOURCE OF TRUTH (credentials never mirror) │
+                         │  SOLE SOURCE OF TRUTH                       │
-                         └───────────────▲───────────────┬────────────┘
+                         └───────────────▲──────────────────────────────┘
-                                         │ SQL             │ one-way mirror
+                                         │ SQL
-                          JSON API       │                 ▼
+                          JSON API       │
-                    ┌────────────────────┴───────┐   ┌───────────────────┐
+                    ┌────────────────────┴───────┐
-                    │   smb-crm (Flask, backoffice)│   │  Google Sheets    │
+                    │   smb-crm (Flask, backoffice)│
-                    │   onboard.mivanchenko.de/crm │   │  (human overview,  │
+                    │   onboard.mivanchenko.de/crm │
-                    │   dashboard + CRUD + iCal    │   │  Looker Studio)    │
+                    │   dashboard + CRUD + iCal    │
-                    └────────────────────▲─────────┘   └───────────────────┘
+                    └────────────────────▲─────────┘
                                          │ HTTP (CRM_API_TOKEN)
                                          │
                     ┌────────────────────┴─────────────────────────────┐
@@ -49,10 +49,9 @@ every client regardless of tier.
                  └───────────────────────────┘  └───────────────────────────┘
 ```
 
-**Postgres is the source of truth.** Google Sheets used to be authoritative; the back-office
+**Postgres is the sole source of truth.** Google Sheets used to be authoritative, then (from
-rewrite (2026-06-25) flipped that — the DB now owns writes, and Sheets is a best-effort,
+2026-06-25) became a best-effort downstream mirror; that mirror was removed entirely (#13) —
-one-way projection kept for the human-readable overview and the Looker Studio dashboard. See
+there is no second data path anymore. See `backoffice/app/db.py` (schema/contract).
-`backoffice/app/db.py` (schema/contract), `backoffice/app/sheets.py` (mirror client).
 
 Everything routes through **Caddy** on the homelab (TLS + basic-auth + reverse proxy) and a
 shared external `proxy` Docker network. Compose groups (§4) are independent projects that only
@@ -61,7 +60,7 @@ share that network — see `deploy/clients/README.md` for the full picture.
 ## 3. Data model
 
 Six entities, defined once in `backoffice/app/db.py::TABLES` and mirrored 1:1 into
-`backoffice/db/init.sql` (Postgres) and Google Sheets tabs (`sheets/SCHEMA.md`):
+`backoffice/db/init.sql` (Postgres):
 
 | Entity | PK | Purpose |
 |---|---|---|
@@ -71,11 +70,10 @@ Six entities, defined once in `backoffice/app/db.py::TABLES` and mirrored 1:1 in
 | `bookings` | `booking_id` | Every appointment, synced from Easy!Appointments via `booking-sync`. |
 | `invoices` | `invoice_id` | Billing records (manual today — no automated invoicing workflow yet). |
 | `activity_log` | `id` (serial) | Append-only audit trail; every mutation (API or workflow) writes one row. |
-| `credentials` | `cred_id` (`CR-<epoch-ms>`) | Per-client login credentials (e.g. the auto-generated Easy!Appointments provider login) — `client_id`, `label`, `username`, `secret`, `notes`. **The one entity excluded from the Sheets mirror** (`mirror: False` in `TABLES`) so secrets never leave Postgres; reading it also requires `X-CRM-Token` (every other entity's list is read-only-open behind Caddy basic-auth alone). Surfaced in the dashboard's **Credentials** tab with a masked value, a reveal toggle, and a copy-to-clipboard button. |
+| `credentials` | `cred_id` (`CR-<epoch-ms>`) | Per-client login credentials (e.g. the auto-generated Easy!Appointments provider login) — `client_id`, `label`, `username`, `secret`, `notes`. Reading it requires `X-CRM-Token` (every other entity's list is read-only-open behind Caddy basic-auth alone), so secrets never leave Postgres. Surfaced in the dashboard's **Credentials** tab with a masked value, a reveal toggle, and a copy-to-clipboard button. |
 
 `db.coerce_row()` is the single place that types/normalizes incoming values (dates, timestamps,
-numbers, booleans) so the CRUD API, the n8n ingest path and the one-time Sheets importer can never
+numbers, booleans) so the CRUD API and the n8n ingest path can never drift on types.
-drift on types.
 
 ## 4. Components
 
@@ -88,7 +86,6 @@ Flask app (`app.py`) + `waitress`, backed by Postgres (`smb-db`, `postgres:16-al
   `renewal_date` from `start_date` + `billing_cycle` (monthly/yearly) when omitted.
 - `PATCH /api/<entity>/<id>` — partial update, same auth.
 - `DELETE /api/<entity>/<id>` — delete, same auth.
-- `POST /api/sync` — force a full DB→Sheets resync of every tab (same auth).
 - `GET /api/bookings.ics` — read-only iCal feed for calendar apps (Apple/Google Calendar can't
   send custom headers, so this is gated by a separate `?token=$ICS_TOKEN` query param instead of
   the header token). Supports `?client_id=` to scope to one client.
@@ -98,15 +95,10 @@ Flask app (`app.py`) + `waitress`, backed by Postgres (`smb-db`, `postgres:16-al
   tab masks the `secret` column by default with a per-row 👁 reveal toggle and a 📋 copy-to-
   clipboard button).
 
-Every write is audit-logged to `activity_log` and enqueues an async, best-effort mirror of that
+Every write is audit-logged to `activity_log`.
-entity (and of `activity_log` itself) into the linked Google Sheet — mirror failures never fail
-the DB write (`mirror_async` / `_mirror_worker` in `app.py`).
-
-`import_from_sheets.py` is a one-time, idempotent bootstrap (upsert by PK) used only to seed
-Postgres from the pre-existing Sheet; after that the Sheet is purely downstream.
 
 Run locally: `docker compose -f backoffice/docker-compose.yml up` (needs `.env` from
-`backoffice/.env.example` + a service-account JSON mounted at `./secrets/gcp-sa.json`).
+`backoffice/.env.example`).
 
 ### 4.2 `templates/landing/` — landing pages & demos
 Static, self-contained HTML (no build step). `templates/landing/index.html` is the public
@@ -160,19 +152,13 @@ keeps the 14 most recent dumps in `/home/mivanchenko/backups/smb-crm/`.
 | `lead-intake.json` | webhook | Normalize a lead payload → `POST /api/leads` → Telegram notify. Used by every demo/client lead form and the callback widget. |
 | `onboarding.json` | webhook (`onboard.mivanchenko.de` form) | Compute client+project rows → `POST /api/clients` → `POST /api/projects` → Telegram notify → **provision Easy!Appointments** (create service, create provider with a generated login, build the booking embed URL) → `PATCH` the client's `stack_notes` with that embed URL + EA username → `POST /api/credentials` with the EA username **and password**. Fully automates "sign a client" end to end, including capturing the generated password so it isn't lost (it used to be discarded after the EA API call — see `TODO.md`). |
 | `booking-sync.json` | webhook (EA) | Normalize a booking event → `POST /api/bookings` → Telegram notify. |
-| `renewal-reminder.json` | daily 08:00 schedule | Read `Clients` from Sheets → find renewals due soon → Telegram notify → append a row to `Activity Log`. **Note:** still reads from the Sheets mirror rather than the DB directly — safe today because the mirror is kept current, but a re-point to the DB would remove that indirection. |
+| `renewal-reminder.json` | daily 08:00 schedule | `GET /api/clients` → find renewals due soon → Telegram notify → `POST /api/activity_log`. |
 
 n8n itself (the workflow engine + its own Postgres/Redis) is **not** part of this repo — it's a
 separate, already-running compose stack on the homelab; only the exported workflow definitions
 live here.
 
-### 4.6 `sheets/SCHEMA.md` — Sheets mirror spec
+### 4.6 `playbooks/` — operator procedure
-Describes the Google Sheets workbook (`SMB-Online — CRM`) that Postgres mirrors into: one tab per
-entity, headers matching column names (n8n / the mirror map by header). Also specifies the
-**Looker Studio** dashboard built on top of it (pipeline by status, MRR, renewals due in 30 days,
-recent leads) — the dashboard itself lives in Google, not in this repo.
-
-### 4.7 `playbooks/` — operator procedure
 - `outreach.md` — how to find prospects, build a personalised preview in ~20 min, and reach out
   (email/DM/phone scripts in German).
 - `lead-to-customer.md` — the full lifecycle once a lead exists: qualify → close → run the
@@ -187,7 +173,7 @@ its own `.env.example` to copy from:
 
 | File | Fills |
 |---|---|
-| `backoffice/.env.example` | `DB_PASSWORD`, `CRM_API_TOKEN`, `SHEET_ID` (+ a service-account JSON mounted at `secrets/gcp-sa.json`, not example-tracked) |
+| `backoffice/.env.example` | `DB_PASSWORD`, `CRM_API_TOKEN` |
 | `deploy/booking/.env.example` | `EA_DB_PASSWORD`, `EA_DB_ROOT_PASSWORD` |
 | `deploy/clients/_template/.env.example` | `CLIENT_SLUG`, `CLIENT_DOMAIN` (per-client, generated by `new-client.sh`) |
 
@@ -196,7 +182,7 @@ Local dev (no build tooling needed anywhere in this repo):
 # Demos — self-contained HTML, open directly or serve the folder:
 python3 -m http.server 8080 --directory templates/landing
 
-# Back office (needs Postgres + a Google service account):
+# Back office (needs Postgres):
 docker compose -f backoffice/docker-compose.yml up
 ```
 Production deploys are `docker compose up -d` per Compose group on the homelab, fronted by Caddy;
@@ -209,18 +195,13 @@ see `deploy/clients/README.md` and each group's own compose file for the exact r
 - The iCal feed is gated by a separate query-string token (`ICS_TOKEN`) since calendar clients
   can't send custom headers — treat that token as effectively public-linkable and rotate it if a
   feed URL leaks.
-- Sheet cell values are defended against formula injection (`_cell()` in `app.py` prefixes
-  values starting with `=+-@` with a `'`).
 - Credentials for client-owned accounts are recorded two ways: `clients.vault_ref` points to a
   Vaultwarden item for anything the operator manually stashes there; the `credentials` table
   holds secrets the *system itself* generates (currently: the Easy!Appointments provider login
-  created during onboarding), gated by `X-CRM-Token` even to read and deliberately excluded from
+  created during onboarding), gated by `X-CRM-Token` even to read. Stored as plaintext in
-  the Sheets mirror. Stored as plaintext in Postgres today — same trust boundary as the rest of
+  Postgres today — same trust boundary as the rest of the CRM (Caddy basic-auth + host security);
-  the CRM (Caddy basic-auth + host security); revisit with column-level encryption (pgcrypto) if
+  revisit with column-level encryption (pgcrypto) if the dashboard is ever exposed more broadly
-  the dashboard is ever exposed more broadly (see `TODO.md`).
+  (see `TODO.md`).
-- The DB→Sheets mirror is clear-then-write, not atomic — a reader can theoretically catch a
-  cleared tab mid-sync. Accepted as low-risk (human overview, not a system of record) — see
-  `TODO.md`.
 
 ## 7. Legal / positioning constraint
 The operator is doing a Cloud Engineer Ausbildung at NETWAYS. This offering deliberately stays

README.md

@@ -2,9 +2,8 @@
 
 A productized service that gets local small businesses online: **landing page + online
 booking + lead capture + small automations**. Built to be **thoroughly tracked and logged** —
-every client, lead, booking and invoice lives in a **Postgres CRM** (source of truth), driven by
+every client, lead, booking and invoice lives in a **Postgres CRM** (sole source of truth),
-**n8n** on the homelab, with a one-way mirror into Google Sheets for a human-readable overview /
+driven by **n8n** on the homelab.
-Looker Studio dashboard.
 
 > Full documentation (architecture, data model, every component): **`Documentation.md`**.
 
@@ -29,7 +28,6 @@ deploy/
   backup/                      Daily Postgres backup script (cron on the homelab)
 n8n/                         Exported n8n workflows (lead-intake, onboarding, booking-sync, renewal-reminder)
 playbooks/                   Operator playbooks (outreach, lead-to-customer, tier-a, tier-b)
-sheets/SCHEMA.md             Google Sheets mirror spec (tabs + columns) — downstream of Postgres
 templates/landing/           Landing-page demos + client preview pages
   demo-tier-a/                  "Schnittpunkt" barbershop demo
   demo-tier-b/                  "PhysioVital" physio practice demo
@@ -65,8 +63,7 @@ Tracked against actual repo state — see `Documentation.md` for what backs each
 - [x] **Phase 1** — Demo landing pages
 - [x] **Phase 2** — Accounts & setup: Google account + workbook, n8n live, Google creds bound,
       Vaultwarden (`clients.vault_ref`), domain (wildcard `*.mivanchenko.de`)
-- [x] **Phase 3** — CRM (now Postgres-first, Sheets mirrored) + n8n lead-intake & renewal
+- [x] **Phase 3** — CRM (Postgres-only, no Sheets mirror) + n8n lead-intake & renewal workflows
-      workflows — Looker Studio dashboard itself lives in Google and isn't repo-verifiable
 - [x] **Phase 4** — Demo forms + booking wired live to n8n webhooks (lead-intake, booking-sync)
 - [ ] **Phase 5** — First real client + reception v1 — onboarding automation and per-client
       deploy tooling exist and are exercised (`deploy/clients/`); not verifiable from the repo

TODO.md

@@ -12,7 +12,6 @@
 **CRM / back office**
 - **#2** Decouple tier from business type → hosting/plan model; realign onboarding form + workflow. `enhancement` `crm`
 - **#3** Extend back-office CRUD beyond Leads & Clients (projects, bookings, invoices, activity). `enhancement` `crm`
-- **#5** Make the DB→Sheets mirror atomic (no brief empty-sheet window). `tech-debt` `crm`
 
 **Booking**
 - **#7** Proper Orders flow + Orders table/tab (pizzeria demo posts into Leads as a stop-gap). `enhancement` `booking`
@@ -41,8 +40,12 @@
   exposed more broadly than Caddy basic-auth + host security.
 
 ## Done
-- [x] 2026-07-15 — **Credentials in the CRM**: `credentials` entity (never mirrored to Sheets,
+- [x] 2026-08-04 — **Cut Google Sheets entirely** (#13): Postgres is now the sole source of
-  `X-CRM-Token`-gated even to read), dashboard Credentials tab with masked value + reveal/copy;
+  truth — deleted the DB→Sheets mirror, the Sheets client, and the one-time importer;
+  `renewal-reminder.json` reads from the DB API instead of the Sheets mirror. Moots #5
+  (atomic-mirror tech-debt, closed as no longer applicable).
+- [x] 2026-07-15 — **Credentials in the CRM**: `credentials` entity (`X-CRM-Token`-gated even to
+  read), dashboard Credentials tab with masked value + reveal/copy;
   `n8n/onboarding.json` now persists the auto-generated EA provider password. Shipped live.
 - [x] 2026-07-15 — **Gitea Actions deploy pipeline** (backoffice): self-hosted `homelab-runner`
   (`act-runner` systemd service), `workflow_dispatch` `deploy-backoffice.yml` that syncs

backoffice/.env.example

@@ -5,7 +5,6 @@ BOOKING_TOKEN_SECRET=change-me-long-random-too
 # Owner-login session cookie signing key (#19). Dedicated secret -- rotating
 # it just logs owners out, without touching CRM_API_TOKEN/BOOKING_TOKEN_SECRET.
 SESSION_SECRET_KEY=change-me-long-random-session-too
-SHEET_ID=1raMSWRZw_JfHlWqOb3LbhaQ6LWx0VGblxIV4Z2pSzp8
 # Booking confirmation email (#18). Left blank, sending is skipped (logged,
 # not fatal) -- mail relay setup is a separate infra/triage item.
 SMTP_HOST=

backoffice/app/app.py

@@ -1,16 +1,12 @@
 """smb-crm back-office service.
 
-Postgres is the source of truth. This serves the operator dashboard + a small
+Postgres is the source of truth for the operator dashboard + a small JSON API.
-JSON API (read now; add/edit/delete and the DB->Sheets mirror layered on next).
 Browser access is gated by Caddy basic-auth on onboard.mivanchenko.de; the
 machine-to-machine ingest path (n8n) is gated by the CRM_API_TOKEN header.
 """
 import os
 import re
 import time
-import queue
-import threading
-import traceback
 from datetime import datetime, date, timezone
 from decimal import Decimal
 
@@ -20,7 +16,6 @@ from waitress import serve
 import booking_db as bdb
 import db
 import owner_mail
-from sheets import Sheets
 from booking_api import bp as booking_bp
 from public_booking import bp as public_booking_bp
 from manage_booking import bp as manage_booking_bp
@@ -47,69 +42,6 @@ CRM_TOKEN = os.environ.get("CRM_API_TOKEN", "")
 # the basic-auth header, so the feed is gated by this query token instead).
 ICS_TOKEN = os.environ.get("ICS_TOKEN", "")
 
-# DB -> Sheets one-way mirror. Postgres is the source of truth; the Sheet is a
-# best-effort projection. A mirror failure never fails the DB write.
-SH = None
-try:
-    SH = Sheets(os.environ["GOOGLE_SA_JSON"], os.environ["SHEET_ID"])
-except Exception:  # noqa: BLE001
-    traceback.print_exc()
-
-
-def _cell(v):
-    if v is None:
-        return ""
-    if isinstance(v, bool):
-        return "TRUE" if v else "FALSE"
-    if isinstance(v, datetime):
-        return v.strftime("%Y-%m-%d %H:%M")
-    if isinstance(v, date):
-        return v.strftime("%Y-%m-%d")
-    if isinstance(v, Decimal):
-        f = float(v)
-        return str(int(f)) if f == int(f) else str(f)
-    s = str(v)
-    return ("'" + s) if s[:1] in "=+-@" else s  # neutralise formula injection
-
-
-def mirror_entity(entity):
-    spec = db.TABLES[entity]
-    if SH is None or spec.get("mirror") is False:
-        return 0
-    cols = spec["cols"]
-    order = LIST_ORDER.get(entity, spec["pk"])
-    with db.connect() as conn, conn.cursor() as cur:
-        cur.execute(f"SELECT {', '.join(cols)} FROM {entity} ORDER BY {order}")
-        rows = cur.fetchall()
-    grid = [[_cell(r[c]) for c in cols] for r in rows]
-    SH.overwrite(spec["tab"], cols, grid)
-    return len(grid)
-
-
-# Serialize all mirror writes through one worker so concurrent mutations can't
-# race on the shared Sheets client / token.
-_mirror_q = queue.Queue()
-
-
-def _mirror_worker():
-    while True:
-        entity = _mirror_q.get()
-        try:
-            mirror_entity(entity)
-        except Exception:  # noqa: BLE001
-            print(f"[mirror] {entity} sync failed:", flush=True)
-            traceback.print_exc()
-        finally:
-            _mirror_q.task_done()
-
-
-threading.Thread(target=_mirror_worker, daemon=True).start()
-
-
-def mirror_async(entity):
-    if SH is not None and db.TABLES[entity].get("mirror") is not False:
-        _mirror_q.put(entity)
-
 # Static dashboard, with the CRM token injected so the (basic-auth-gated)
 # operator page can call the token-protected mutation endpoints.
 with open(os.path.join(os.path.dirname(__file__), "static", "index.html")) as _f:
@@ -235,8 +167,6 @@ def add_entity(entity):
                     [row.get(c) for c in cols])
         log_activity(cur, row.get("client_id"), f"add {entity}", f"{pk}={row.get(pk)}")
         conn.commit()
-    mirror_async(entity)
-    mirror_async("activity_log")
     return jsonify({"added": row.get(pk)}), 201
 
 
@@ -262,8 +192,6 @@ def edit_entity(entity, ident):
         log_activity(cur, ident if entity == "clients" else None,
                      f"edit {entity}", f"{pk}={ident}: {', '.join(setcols)}")
         conn.commit()
-    mirror_async(entity)
-    mirror_async("activity_log")
     return jsonify({"updated": ident, "fields": setcols})
 
 
@@ -281,8 +209,6 @@ def delete_entity(entity, ident):
         log_activity(cur, ident if entity == "clients" else None,
                      f"delete {entity}", f"{pk}={ident}")
         conn.commit()
-    mirror_async(entity)
-    mirror_async("activity_log")
     return jsonify({"deleted": ident})
 
 
@@ -313,26 +239,9 @@ def trigger_owner_password_reset(user_id):
         log_activity(cur, user["client_id"], "owner password reset",
                      f"user_id={user_id} (operator-triggered)")
         conn.commit()
-    mirror_async("activity_log")
     return jsonify({"sent": user_id})
 
 
-@app.post("/api/sync")
-def sync_all():
-    """Full DB -> Sheets resync of every tab (manual / alignment)."""
-    if not authed():
-        return jsonify({"error": "forbidden"}), 403
-    if SH is None:
-        return jsonify({"error": "sheets unavailable"}), 503
-    out = {}
-    for entity in db.TABLES:
-        try:
-            out[entity] = mirror_entity(entity)
-        except Exception as e:  # noqa: BLE001
-            out[entity] = f"error: {e}"
-    return jsonify({"synced": out})
-
-
 def _ics_dt(v):
     if isinstance(v, datetime):
         u = v if v.tzinfo else v.replace(tzinfo=timezone.utc)

backoffice/app/db.py

@@ -1,8 +1,8 @@
 """Postgres access + the table/column contract shared across the app.
 
 The TABLES map is the single definition of which entities exist, their columns,
-and their primary key. Read/CRUD endpoints, the importer and the Sheets mirror
+and their primary key. Read/CRUD endpoints all derive from it so they can
-all derive from it so they can never drift apart.
+never drift apart.
 """
 import os
 import re
@@ -13,10 +13,9 @@ from psycopg.rows import dict_row
 
 DATABASE_URL = os.environ["DATABASE_URL"]
 
-# entity -> (sheet tab, primary key, ordered columns)
+# entity -> (primary key, ordered columns)
 TABLES = {
     "clients": {
-        "tab": "Clients",
         "pk": "client_id",
         "cols": ["client_id", "business_name", "owner_name", "email", "phone",
                  "niche", "tier", "status", "domain", "stack_notes", "vault_ref",
@@ -28,7 +27,6 @@ TABLES = {
         "bools": [],
     },
     "leads": {
-        "tab": "Leads",
         "pk": "lead_id",
         "cols": ["lead_id", "received_at", "client_id", "source", "name",
                  "contact", "service_interest", "message", "status", "notified"],
@@ -38,7 +36,6 @@ TABLES = {
         "bools": ["notified"],
     },
     "projects": {
-        "tab": "Projects",
         "pk": "project_id",
         "cols": ["project_id", "client_id", "deliverable", "tier", "checklist",
                  "go_live_date", "status"],
@@ -48,7 +45,6 @@ TABLES = {
         "bools": [],
     },
     "bookings": {
-        "tab": "Bookings",
         "pk": "booking_id",
         "cols": ["booking_id", "created_at", "client_id", "customer_name",
                  "customer_contact", "service", "start_time", "end_time",
@@ -59,7 +55,6 @@ TABLES = {
         "bools": [],
     },
     "invoices": {
-        "tab": "Invoices",
         "pk": "invoice_id",
         "cols": ["invoice_id", "client_id", "issued_date", "due_date",
                  "amount_eur", "period", "status", "paid_date"],
@@ -69,7 +64,6 @@ TABLES = {
         "bools": [],
     },
     "activity_log": {
-        "tab": "Activity Log",
         "pk": "id",
         "cols": ["ts", "workflow", "client_id", "action", "detail", "result"],
         "dates": [],
@@ -78,14 +72,13 @@ TABLES = {
         "bools": [],
     },
     "credentials": {
-        # No "tab": never mirrored to Sheets (see "mirror" below) — secrets stay in Postgres only.
+        # Secrets stay in Postgres only.
         "pk": "cred_id",
         "cols": ["cred_id", "client_id", "label", "username", "secret", "notes", "created_at"],
         "dates": [],
         "timestamps": ["created_at"],
         "numbers": [],
         "bools": [],
-        "mirror": False,
     },
 }
 
@@ -94,7 +87,7 @@ def connect():
     return psycopg.connect(DATABASE_URL, row_factory=dict_row)
 
 
-# ---- coercion: Sheet strings / JSON values -> typed Python for Postgres ----
+# ---- coercion: JSON request values -> typed Python for Postgres ----
 
 def parse_date(v):
     if v in (None, ""):

backoffice/app/import_from_sheets.py

@@ -1,57 +0,0 @@
-"""One-time (idempotent) seed of Postgres from the existing Google Sheets.
-
-This is the ONLY place the Sheet is treated as authoritative — to bootstrap the
-DB. After this, Postgres is the source of truth and Sheets is a downstream
-mirror. Safe to re-run: keyed tables upsert by primary key; activity_log is
-replaced wholesale.
-
-Run inside the container:  docker compose exec smb-crm python import_from_sheets.py
-"""
-import os
-import sys
-
-import db
-from sheets import Sheets
-
-
-def upsert(cur, entity, records):
-    spec = db.TABLES[entity]
-    cols = spec["cols"]
-    pk = spec["pk"]
-    n = 0
-    for rec in records:
-        row = db.coerce_row(entity, rec)
-        if entity != "activity_log" and not row.get(pk):
-            continue  # skip rows without a primary key
-        placeholders = ", ".join(["%s"] * len(cols))
-        collist = ", ".join(cols)
-        if entity == "activity_log":
-            cur.execute(f"INSERT INTO {entity} ({collist}) VALUES ({placeholders})",
-                        [row[c] for c in cols])
-        else:
-            updates = ", ".join(f"{c} = EXCLUDED.{c}" for c in cols if c != pk)
-            cur.execute(
-                f"INSERT INTO {entity} ({collist}) VALUES ({placeholders}) "
-                f"ON CONFLICT ({pk}) DO UPDATE SET {updates}",
-                [row[c] for c in cols])
-        n += 1
-    return n
-
-
-def main():
-    sh = Sheets(os.environ["GOOGLE_SA_JSON"], os.environ["SHEET_ID"])
-    with db.connect() as conn:
-        with conn.cursor() as cur:
-            cur.execute("TRUNCATE activity_log RESTART IDENTITY")
-            for entity, spec in db.TABLES.items():
-                if spec.get("mirror") is False:
-                    continue  # e.g. credentials — never lived in the Sheet, nothing to import
-                records = sh.read_records(spec["tab"])
-                n = upsert(cur, entity, records)
-                print(f"  {entity:<13} <- {spec['tab']:<13} {n} row(s)")
-        conn.commit()
-    print("import complete.")
-
-
-if __name__ == "__main__":
-    sys.exit(main())

backoffice/app/mailer.py

@@ -1,8 +1,8 @@
 """Best-effort SMTP email sending (#18).
 
-Mirrors app.py's DB -> Sheets mirror pattern: a single background worker
+A single background worker thread drains a queue, and a send failure is
-thread drains a queue, and a send failure is logged, never raised back to the
+logged, never raised back to the caller -- booking creation must succeed even
-caller -- booking creation must succeed even if the mail relay is down.
+if the mail relay is down.
 """
 import os
 import queue

backoffice/app/requirements.txt

@@ -8,7 +8,6 @@ Flask==3.0.3
 psycopg[binary]==3.2.1
 waitress==3.0.0
 PyJWT[crypto]==2.9.0
-requests==2.32.3
 # python:3.12-slim has no system IANA tz database; zoneinfo (used by
 # availability.py for Europe/Berlin) falls back to this package for it.
 tzdata==2024.1

backoffice/app/sheets.py

@@ -1,98 +0,0 @@
-"""Minimal Google Sheets v4 client using a service-account JWT.
-
-Used for (a) the one-time import of existing Sheet rows into Postgres and
-(b) the one-way DB -> Sheets mirror sync. Postgres stays the source of truth;
-nothing here treats the Sheet as authoritative except the explicit import.
-"""
-import json
-import time
-import threading
-
-import jwt
-import requests
-
-SHEETS_API = "https://sheets.googleapis.com/v4/spreadsheets"
-TOKEN_URL = "https://oauth2.googleapis.com/token"
-SCOPE = "https://www.googleapis.com/auth/spreadsheets"
-
-# gid map for the live workbook (tab name -> gid), used when clearing/sizing.
-TAB_GIDS = {
-    "Clients": 470934735,
-    "Leads": 571719114,
-    "Bookings": 946084008,
-    "Projects": 619112786,
-    "Invoices": 413377229,
-    "Activity Log": 170940481,
-}
-
-
-class Sheets:
-    def __init__(self, sa_json_path, sheet_id):
-        with open(sa_json_path) as f:
-            self.sa = json.load(f)
-        self.sheet_id = sheet_id
-        self._tok = None
-        self._exp = 0
-        self._lock = threading.Lock()
-
-    def _token(self):
-        with self._lock:
-            now = int(time.time())
-            if self._tok and now < self._exp - 60:
-                return self._tok
-            claim = {
-                "iss": self.sa["client_email"],
-                "scope": SCOPE,
-                "aud": TOKEN_URL,
-                "iat": now,
-                "exp": now + 3600,
-            }
-            assertion = jwt.encode(claim, self.sa["private_key"], algorithm="RS256")
-            r = requests.post(TOKEN_URL, data={
-                "grant_type": "urn:ietf:params:oauth:grant-type:jwt-bearer",
-                "assertion": assertion,
-            }, timeout=30)
-            r.raise_for_status()
-            self._tok = r.json()["access_token"]
-            self._exp = now + 3600
-            return self._tok
-
-    def _headers(self):
-        return {"Authorization": "Bearer " + self._token()}
-
-    def read(self, a1_range):
-        """Return raw 2D list of cell values for an A1 range (e.g. "Leads!A1:Z")."""
-        url = f"{SHEETS_API}/{self.sheet_id}/values/{requests.utils.quote(a1_range)}"
-        r = requests.get(url, headers=self._headers(), timeout=30)
-        r.raise_for_status()
-        return r.json().get("values", [])
-
-    def read_records(self, tab):
-        """Read a whole tab as a list of dicts keyed by the header row."""
-        rows = self.read(f"{tab}!A1:Z")
-        if not rows:
-            return []
-        header = rows[0]
-        out = []
-        for raw in rows[1:]:
-            if not any(c.strip() for c in raw):
-                continue
-            rec = {header[i]: (raw[i] if i < len(raw) else "") for i in range(len(header))}
-            out.append(rec)
-        return out
-
-    def overwrite(self, tab, header, rows):
-        """Replace a tab's contents with header + rows (the DB->Sheets mirror).
-
-        Clears the existing value range, then writes the new grid starting at A1.
-        Postgres is the source of truth; this projects it onto the Sheet.
-        """
-        # clear current values (keeps formatting / the tab itself)
-        clr = f"{SHEETS_API}/{self.sheet_id}/values/{requests.utils.quote(tab + '!A1:Z')}:clear"
-        requests.post(clr, headers=self._headers(), timeout=30).raise_for_status()
-        body = {"values": [header] + rows}
-        url = (f"{SHEETS_API}/{self.sheet_id}/values/"
-               f"{requests.utils.quote(tab + '!A1')}?valueInputOption=RAW")
-        r = requests.put(url, headers=self._headers(), json=body, timeout=60)
-        r.raise_for_status()
-        return len(rows)

backoffice/app/static/index.html

@@ -74,7 +74,7 @@
     <h1>🗂️ smb-crm · Back Office</h1>
     <div class="hgroup">
       <a class="btn ghost" href="/">📝 Onboarding-Formular</a>
-      <span class="src">Quelle: Postgres (Sheets = Spiegel) · <span id="now"></span></span>
+      <span class="src">Quelle: Postgres · <span id="now"></span></span>
     </div>
   </header>
   <div class="wrap">

backoffice/app/tests/test_mailer.py

@@ -1,7 +1,6 @@
 """Unit tests for mailer.py's SMTP call shape (#18). Calls _send_now directly
 rather than going through the background-thread queue, so assertions are
-synchronous -- the queue itself is just plumbing, already covered indirectly
+synchronous -- the queue itself is just plumbing.
-by app.py's identical Sheets-mirror pattern.
 """
 from email.message import EmailMessage
 

backoffice/db/init.sql

@@ -1,6 +1,4 @@
--- smb-crm — source-of-truth schema (Postgres).
+-- smb-crm — sole source-of-truth schema (Postgres).
--- Google Sheets is a one-way downstream mirror fed by the DB->Sheets sync.
--- Column sets mirror the Sheet tabs so the mirror stays 1:1.
 
 CREATE TABLE IF NOT EXISTS clients (
     client_id        text PRIMARY KEY,
@@ -87,8 +85,8 @@ CREATE TABLE IF NOT EXISTS invoices (
 );
 
 -- Per-client login credentials (e.g. the auto-generated Easy!Appointments
--- provider login). Deliberately NOT mirrored to Sheets — see db.py TABLES
+-- provider login). Gated by X-CRM-Token even to read, so secrets never leave
--- ("mirror": False) — so secrets never leave Postgres.
+-- Postgres.
 CREATE TABLE IF NOT EXISTS credentials (
     cred_id      text PRIMARY KEY,
     client_id    text,

backoffice/docker-compose.yml

@@ -27,16 +27,12 @@ services:
       BOOKING_TOKEN_SECRET: ${BOOKING_TOKEN_SECRET}
       SESSION_SECRET_KEY: ${SESSION_SECRET_KEY}
       ICS_TOKEN: ${ICS_TOKEN}
-      SHEET_ID: ${SHEET_ID}
-      GOOGLE_SA_JSON: /run/secrets/gcp-sa.json
       SMTP_HOST: ${SMTP_HOST}
       SMTP_PORT: ${SMTP_PORT}
       SMTP_USERNAME: ${SMTP_USERNAME}
       SMTP_PASSWORD: ${SMTP_PASSWORD}
       MAIL_FALLBACK_FROM: ${MAIL_FALLBACK_FROM}
       PUBLIC_BASE_URL: ${PUBLIC_BASE_URL}
-    volumes:
-      - ./secrets/gcp-sa.json:/run/secrets/gcp-sa.json:ro
     depends_on:
       smb-db:
         condition: service_healthy

n8n/renewal-reminder.json

@@ -1,5 +1,5 @@
 {
-  "name": "SMB \u00b7 Renewal Reminder",
+  "name": "SMB · Renewal Reminder",
   "nodes": [
     {
       "parameters": {
@@ -23,43 +23,24 @@
     },
     {
       "parameters": {
-        "authentication": "serviceAccount",
+        "url": "http://smb-crm:8080/api/clients",
-        "resource": "sheet",
-        "operation": "read",
-        "documentId": {
-          "__rl": true,
-          "value": "1raMSWRZw_JfHlWqOb3LbhaQ6LWx0VGblxIV4Z2pSzp8",
-          "mode": "id"
-        },
-        "sheetName": {
-          "__rl": true,
-          "value": "470934735",
-          "mode": "list",
-          "cachedResultName": "Clients"
-        },
         "options": {}
       },
       "id": "f06a60af-dff1-415d-aca6-fef0367f3553",
-      "name": "Read Clients",
+      "name": "Read Clients (DB)",
-      "type": "n8n-nodes-base.googleSheets",
+      "type": "n8n-nodes-base.httpRequest",
-      "typeVersion": 4.5,
+      "typeVersion": 4.2,
       "position": [
         460,
         300
       ],
-      "credentials": {
-        "googleApi": {
-          "id": "45TWPyl1wVk2Vxdm",
-          "name": "SMB Google (service account)"
-        }
-      },
       "retryOnFail": true,
       "maxTries": 4,
       "waitBetweenTries": 3000
     },
     {
       "parameters": {
-        "jsCode": "\nconst rows = $input.all().map(i=>i.json);\nconst today=new Date();\nconst t0=Date.UTC(today.getUTCFullYear(),today.getUTCMonth(),today.getUTCDate());\nfunction parseDate(v){\n  if(v==null||v==='') return null;\n  const s=String(v).trim();\n  if(/^\\d+(\\.\\d+)?$/.test(s)){ return Date.UTC(1899,11,30)+Number(s)*86400000; }\n  const m=s.match(/^(\\d{4})-(\\d{2})-(\\d{2})/);\n  if(m) return Date.UTC(+m[1],+m[2]-1,+m[3]);\n  const d=Date.parse(s); return isNaN(d)?null:d;\n}\nconst offsets=[14,7,3,1,0];\nconst due=[];\nfor(const r of rows){\n  const status=String(r.status||'').toLowerCase();\n  if(status!=='active') continue;\n  const rd=parseDate(r.renewal_date);\n  if(rd==null) continue;\n  const days=Math.round((rd-t0)/86400000);\n  if(days<0 || offsets.includes(days)){\n    due.push({client_id:r.client_id, business:r.business_name, renewal_date:r.renewal_date,\n              days, fee:r.monthly_fee_eur, cycle:r.billing_cycle});\n  }\n}\nif(due.length===0) return [];\ndue.sort((a,b)=>a.days-b.days);\nconst line=d=>`\u2022 ${d.business||d.client_id} \u2014 ${d.days<0?('\u00dcBERF\u00c4LLIG seit '+(-d.days)+'T'):(d.days===0?'heute':('in '+d.days+'T'))} (${d.renewal_date}${d.fee?(', '+d.fee+'\u20ac/'+(d.cycle||'')):''})`;\nconst summary='\ud83d\udd14 Anstehende Verl\u00e4ngerungen ('+due.length+')\\n'+due.map(line).join('\\n');\nreturn [{json:{count:due.length, summary, due}}];\n"
+        "jsCode": "\nconst rows = $input.first().json.rows || [];\nconst today=new Date();\nconst t0=Date.UTC(today.getUTCFullYear(),today.getUTCMonth(),today.getUTCDate());\nfunction parseDate(v){\n  if(v==null||v==='') return null;\n  const s=String(v).trim();\n  const m=s.match(/^(\\d{4})-(\\d{2})-(\\d{2})/);\n  if(m) return Date.UTC(+m[1],+m[2]-1,+m[3]);\n  const d=Date.parse(s); return isNaN(d)?null:d;\n}\nconst offsets=[14,7,3,1,0];\nconst due=[];\nfor(const r of rows){\n  const status=String(r.status||'').toLowerCase();\n  if(status!=='active') continue;\n  const rd=parseDate(r.renewal_date);\n  if(rd==null) continue;\n  const days=Math.round((rd-t0)/86400000);\n  if(days<0 || offsets.includes(days)){\n    due.push({client_id:r.client_id, business:r.business_name, renewal_date:r.renewal_date,\n              days, fee:r.monthly_fee_eur, cycle:r.billing_cycle});\n  }\n}\nif(due.length===0) return [];\ndue.sort((a,b)=>a.days-b.days);\nconst line=d=>`• ${d.business||d.client_id} — ${d.days<0?('ÜBERFÄLLIG seit '+(-d.days)+'T'):(d.days===0?'heute':('in '+d.days+'T'))} (${d.renewal_date}${d.fee?(', '+d.fee+'€/'+(d.cycle||'')):''})`;\nconst summary='🔔 Anstehende Verlängerungen ('+due.length+')\\n'+due.map(line).join('\\n');\nreturn [{json:{count:due.length, summary, due}}];\n"
       },
       "id": "9f3e4ca9-0d87-4d1c-9f5e-abdf5f9f77dd",
       "name": "Find due renewals",
@@ -110,42 +91,30 @@
     },
     {
       "parameters": {
-        "authentication": "serviceAccount",
+        "method": "POST",
-        "resource": "sheet",
+        "url": "http://smb-crm:8080/api/activity_log",
-        "operation": "append",
+        "sendHeaders": true,
-        "documentId": {
+        "headerParameters": {
-          "__rl": true,
+          "parameters": [
-          "value": "1raMSWRZw_JfHlWqOb3LbhaQ6LWx0VGblxIV4Z2pSzp8",
+            {
-          "mode": "id"
+              "name": "X-CRM-Token",
-        },
+              "value": "__CRM_TOKEN__"
-        "sheetName": {
+            }
-          "__rl": true,
+          ]
-          "value": "170940481",
-          "mode": "list",
-          "cachedResultName": "Activity Log"
-        },
-        "columns": {
-          "mappingMode": "autoMapInputData",
-          "value": {},
-          "matchingColumns": [],
-          "schema": []
         },
+        "sendBody": true,
+        "specifyBody": "json",
+        "jsonBody": "={{ JSON.stringify($json) }}",
         "options": {}
       },
       "id": "55978962-489b-4740-a242-7470f08087b6",
-      "name": "Append to Activity Log",
+      "name": "Append to Activity Log (DB)",
-      "type": "n8n-nodes-base.googleSheets",
+      "type": "n8n-nodes-base.httpRequest",
-      "typeVersion": 4.5,
+      "typeVersion": 4.2,
       "position": [
         1340,
         300
       ],
-      "credentials": {
-        "googleApi": {
-          "id": "45TWPyl1wVk2Vxdm",
-          "name": "SMB Google (service account)"
-        }
-      },
       "retryOnFail": true,
       "maxTries": 4,
       "waitBetweenTries": 3000
@@ -156,14 +125,14 @@
       "main": [
         [
           {
-            "node": "Read Clients",
+            "node": "Read Clients (DB)",
             "type": "main",
             "index": 0
           }
         ]
       ]
     },
-    "Read Clients": {
+    "Read Clients (DB)": {
       "main": [
         [
           {
@@ -200,7 +169,7 @@
       "main": [
         [
           {
-            "node": "Append to Activity Log",
+            "node": "Append to Activity Log (DB)",
             "type": "main",
             "index": 0
           }

playbooks/tier-a-google.md

@@ -19,7 +19,7 @@ ongoing management. Target build time: ~half a day per client.
 6. **Reception** — Gmail for the business; set a signature + canned replies.
 7. **Google Business Profile** — claim/verify so they show up on Maps & Search.
 8. **CRM** — add a `Clients` row (tier = A, services, monthly_fee, renewal_date, vault_ref).
-9. **Handover** — share logins via Vaultwarden; record only the `vault_ref` in the sheet.
+9. **Handover** — share logins via Vaultwarden; record only the `vault_ref` in the CRM.
 
 ## What to charge (suggestion)
 - One-off setup: €250–600 depending on pages/content.

playbooks/tier-b-selfhosted.md

@@ -16,7 +16,7 @@ German-hosted infrastructure. You charge a privacy/hosting premium. Target build
 4. **Lead form** — self-hosted form endpoint → n8n webhook → CRM. No third-party form service.
 5. **Reception** — business mailbox; (later) the **AI receptionist** widget (Phase 6, Claude
    Haiku 4.5) wired to the booking + FAQ.
-6. **Credentials** — store all client logins in **Vaultwarden**; sheet holds only `vault_ref`.
+6. **Credentials** — store all client logins in **Vaultwarden**; the CRM holds only `vault_ref`.
 7. **CRM** — add a `Clients` row (tier = B, services, monthly_fee, renewal_date, vault_ref).
 8. **Backups** — ensure the Tier-B services + CRM are in the daily backup job.
 

sheets/SCHEMA.md

@@ -1,63 +0,0 @@
-# Master CRM — Google Sheets workbook spec
-
-One Google Sheets workbook = the whole CRM + log. I create/maintain this via the Google Drive MCP
-once the fresh project Google account exists (Phase 2). n8n reads/writes it via the Sheets node.
-
-Workbook name: **`SMB-Online — CRM`**. One tab per concern below. Row 1 = headers (exact column
-names matter — n8n maps by header).
-
-## Tab: `Clients`
-The client list/table — the heart of the tracking requirement.
-
-| Column | Type | Notes |
-|---|---|---|
-| `client_id` | text | e.g. `C-0001` (stable key) |
-| `business_name` | text | |
-| `owner_name` | text | |
-| `email` | text | |
-| `phone` | text | |
-| `niche` | text | barber, physio, café, … |
-| `tier` | A \| B | delivery tier |
-| `status` | enum | `lead` → `onboarding` → `active` → `paused` → `churned` |
-| `domain` | text | live site URL |
-| `stack_notes` | text | hosting, booking tool, etc. |
-| `vault_ref` | text | **pointer** to Vaultwarden item — never a password |
-| `services` | text | comma list: site, booking, reception, … |
-| `billing_cycle` | enum | monthly / yearly / one-off |
-| `monthly_fee_eur` | number | |
-| `start_date` | date | |
-| `renewal_date` | date | drives the renewal-reminder workflow |
-| `created_at` | datetime | |
-| `notes` | text | |
-
-## Tab: `Leads`
-Every inbound lead across all client sites (and your own).
-
-`lead_id` · `received_at` · `client_id` · `source` (which site/form) · `name` · `contact` ·
-`service_interest` · `message` · `status` (new / contacted / won / lost) · `notified` (bool)
-
-## Tab: `Bookings`
-Every appointment booked across client sites.
-
-`booking_id` · `created_at` · `client_id` · `customer_name` · `customer_contact` · `service` ·
-`start_time` · `end_time` · `source` (gcal / calcom) · `status` (confirmed / cancelled / no-show)
-
-## Tab: `Projects`
-Per-client deliverable tracking.
-
-`project_id` · `client_id` · `deliverable` · `tier` · `checklist` (e.g. `domain✓ page✓ booking☐`) ·
-`go_live_date` · `status` (todo / in-progress / live)
-
-## Tab: `Invoices`
-`invoice_id` · `client_id` · `issued_date` · `due_date` · `amount_eur` · `period` ·
-`status` (draft / sent / paid / overdue) · `paid_date`
-
-## Tab: `Activity Log`
-Append-only audit trail — **every automated action writes one row here.**
-
-`ts` · `workflow` (lead-intake / booking-sync / renewal / onboarding / invoice) · `client_id` ·
-`action` · `detail` · `result` (ok / error)
-
-## Dashboard
-Not a tab — a **Looker Studio** report wired to this workbook: pipeline by `status`, MRR
-(sum of `monthly_fee_eur` where `status=active`), renewals due in next 30 days, recent leads.