diff --git a/services/mongodb/drivers/flask.sh b/services/mongodb/drivers/flask.sh
index d0dbba7..d44eb84 100644
--- a/services/mongodb/drivers/flask.sh
+++ b/services/mongodb/drivers/flask.sh
@@ -1,9 +1,5 @@
+# How Flask talks to MongoDB.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/mongodb/drivers/flask.sh
-# Description : How Flask talks to MongoDB.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # Self-contained, like services/mongodb/drivers/laravel.sh: a DSN, not
 # decomposed credentials. Sources services/shared/flask.sh only to reuse
 # splice_flask_probe, then overrides service_driver_apply,
diff --git a/services/mongodb/drivers/laravel.sh b/services/mongodb/drivers/laravel.sh
index 149113a..f080738 100644
--- a/services/mongodb/drivers/laravel.sh
+++ b/services/mongodb/drivers/laravel.sh
@@ -1,9 +1,5 @@
+# How Laravel talks to MongoDB.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/mongodb/drivers/laravel.sh
-# Description : How Laravel talks to MongoDB.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # Self-contained rather than sourcing services/shared/laravel.sh: mongodb wires
 # a DSN and a config/database.php connection instead of the decomposed
 # DB_HOST/DB_PORT/DB_USERNAME/DB_PASSWORD every relational driver shares.
@@ -28,10 +24,13 @@ service_driver_apply() {
   # empty and laravel refuses to boot.
   write_env_lines "${SCAFFOLD_PROJECT_ROOT}/example.env" "APP_KEY=changeme" || return 1
 
-  # mongodb has no SQL to run a `select 1` against; ping is what
-  # laravel-mongodb exposes. The class arrives as a short name with its own
-  # `use`: pint's fully_qualified_strict_types rejects an inline FQCN once the
-  # file has imports.
+  splice_mongodb_probe || return 1
+}
+
+# mongodb has no SQL to run a `select 1` against; ping is what laravel-mongodb
+# exposes. The class arrives as a short name with its own `use`: pint's
+# fully_qualified_strict_types rejects an inline FQCN once the file has imports.
+splice_mongodb_probe() {
   sed -i.bak 's|use Illuminate\\Support\\Facades\\Route;|use Illuminate\\Support\\Facades\\DB;\nuse Illuminate\\Support\\Facades\\Route;|' \
     routes/health.php || return 1
   sed -i.bak 's|// @DB_PROBE@|DB::connection(\x27mongodb\x27)->getMongoDB()->command([\x27ping\x27 => 1]);|' \
diff --git a/services/mongodb/drivers/nest.sh b/services/mongodb/drivers/nest.sh
index 0c601d6..855810b 100644
--- a/services/mongodb/drivers/nest.sh
+++ b/services/mongodb/drivers/nest.sh
@@ -1,9 +1,5 @@
+# MongoDB parameters for the shared Prisma driver.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/mongodb/drivers/nest.sh
-# Description : MongoDB parameters for the shared Prisma driver.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # shellcheck disable=SC2034 # read by services/shared/nest.sh, sourced below
 PRISMA_PROVIDER="mongodb"
 # authSource=admin because the container creates the user in `admin`, and
diff --git a/services/mysql/drivers/flask.sh b/services/mysql/drivers/flask.sh
index 70d8b0d..2746fb2 100644
--- a/services/mysql/drivers/flask.sh
+++ b/services/mysql/drivers/flask.sh
@@ -1,9 +1,5 @@
+# MySQL parameters for the shared Flask driver.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/mysql/drivers/flask.sh
-# Description : MySQL parameters for the shared Flask driver.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # shellcheck disable=SC2034 # read by services/shared/flask.sh, sourced below
 FLASK_DIALECT="mysql+pymysql"
 # pure python, so no build stage and no system package
diff --git a/services/mysql/drivers/laravel.sh b/services/mysql/drivers/laravel.sh
index eebd9ec..7d33561 100644
--- a/services/mysql/drivers/laravel.sh
+++ b/services/mysql/drivers/laravel.sh
@@ -1,9 +1,5 @@
+# MySQL parameters for the shared Laravel driver.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/mysql/drivers/laravel.sh
-# Description : MySQL parameters for the shared Laravel driver.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # shellcheck disable=SC2034 # read by services/shared/laravel.sh, sourced below
 LARAVEL_CONNECTION="mysql"
 LARAVEL_PORT="3306"
diff --git a/services/mysql/drivers/nest.sh b/services/mysql/drivers/nest.sh
index abf72f3..08201f5 100644
--- a/services/mysql/drivers/nest.sh
+++ b/services/mysql/drivers/nest.sh
@@ -1,9 +1,5 @@
+# MySQL parameters for the shared Prisma driver.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/mysql/drivers/nest.sh
-# Description : MySQL parameters for the shared Prisma driver.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # shellcheck disable=SC2034 # read by services/shared/nest.sh, sourced below
 PRISMA_PROVIDER="mysql"
 PRISMA_URL="mysql://app:app@localhost:3306/app"
diff --git a/services/postgres/drivers/flask.sh b/services/postgres/drivers/flask.sh
index 84560cf..dd19461 100644
--- a/services/postgres/drivers/flask.sh
+++ b/services/postgres/drivers/flask.sh
@@ -1,9 +1,5 @@
+# PostgreSQL parameters for the shared Flask driver.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/postgres/drivers/flask.sh
-# Description : PostgreSQL parameters for the shared Flask driver.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # shellcheck disable=SC2034 # read by services/shared/flask.sh, sourced below
 FLASK_DIALECT="postgresql+psycopg"
 # the [binary] extra ships a wheel with libpq inside, so the image needs no
diff --git a/services/postgres/drivers/laravel.sh b/services/postgres/drivers/laravel.sh
index b6f217d..c5c3060 100644
--- a/services/postgres/drivers/laravel.sh
+++ b/services/postgres/drivers/laravel.sh
@@ -1,9 +1,5 @@
+# PostgreSQL parameters for the shared Laravel driver.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/postgres/drivers/laravel.sh
-# Description : PostgreSQL parameters for the shared Laravel driver.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # shellcheck disable=SC2034 # read by services/shared/laravel.sh, sourced below
 LARAVEL_CONNECTION="pgsql"
 LARAVEL_PORT="5432"
diff --git a/services/postgres/drivers/nest.sh b/services/postgres/drivers/nest.sh
index eb2b559..38a4e07 100644
--- a/services/postgres/drivers/nest.sh
+++ b/services/postgres/drivers/nest.sh
@@ -1,9 +1,5 @@
+# PostgreSQL parameters for the shared Prisma driver.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/postgres/drivers/nest.sh
-# Description : PostgreSQL parameters for the shared Prisma driver.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # shellcheck disable=SC2034 # read by services/shared/nest.sh, sourced below
 PRISMA_PROVIDER="postgresql"
 PRISMA_URL="postgresql://app:app@localhost:5432/app"
diff --git a/services/redis/drivers/flask.sh b/services/redis/drivers/flask.sh
index f93b8c5..1dbbfd2 100644
--- a/services/redis/drivers/flask.sh
+++ b/services/redis/drivers/flask.sh
@@ -1,9 +1,5 @@
+# How Flask talks to Redis.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/redis/drivers/flask.sh
-# Description : How Flask talks to Redis.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # Self-contained: redis is the only cache, so a shared body would have exactly
 # one caller. Extract one when a second cache arrives.
 service_driver_apply() {
diff --git a/services/redis/drivers/laravel.sh b/services/redis/drivers/laravel.sh
index 042fad8..0042958 100644
--- a/services/redis/drivers/laravel.sh
+++ b/services/redis/drivers/laravel.sh
@@ -1,14 +1,9 @@
+# How Laravel talks to Redis.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/redis/drivers/laravel.sh
-# Description : How Laravel talks to Redis.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # Self-contained: redis is the only cache, so a shared body would have exactly
 # one caller. Extract one when a second cache arrives.
 service_driver_apply() {
   # predis, not the phpredis extension: a composer package needs no build stage.
-  #
   composer require predis/predis --no-interaction || return 1
 
   write_env_lines .env.example \
diff --git a/services/redis/drivers/nest.sh b/services/redis/drivers/nest.sh
index 511a608..f1fc9f4 100644
--- a/services/redis/drivers/nest.sh
+++ b/services/redis/drivers/nest.sh
@@ -1,9 +1,5 @@
+# How NestJS talks to Redis.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/redis/drivers/nest.sh
-# Description : How NestJS talks to Redis.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # Self-contained: redis is the only cache, so a shared body would have exactly
 # one caller. Extract one when a second cache arrives.
 service_driver_apply() {
diff --git a/services/shared/flask.sh b/services/shared/flask.sh
index b0d6469..c56d0d9 100644
--- a/services/shared/flask.sh
+++ b/services/shared/flask.sh
@@ -1,9 +1,5 @@
+# The shared Flask SQLAlchemy driver body.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/shared/flask.sh
-# Description : The shared Flask SQLAlchemy driver body.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # A service's drivers/flask.sh sets these and sources this. mysql and postgres
 # only — mongodb is self-contained: pymongo has no SQLAlchemy dialect, so its
 # driver defines its own service_driver_apply after sourcing this file, kept
@@ -77,6 +73,9 @@ splice_flask_probe() {
   ' "$file" >"${file}.tmp" || return 1
   mv "${file}.tmp" "$file"
 
+  # Checks that the fallback and both anchors are gone, not that the success
+  # return exists: live() already returns jsonify(status="ok"), so a presence
+  # grep for it would pass even when the splice failed.
   # shellcheck disable=SC2015 # deliberate: die must fire when any grep fails
   ! grep -q 'no database is configured for this project' "$file" &&
     ! grep -q '@DB_ENGINE@' "$file" &&
diff --git a/services/shared/laravel.sh b/services/shared/laravel.sh
index baea1a6..d75a23b 100644
--- a/services/shared/laravel.sh
+++ b/services/shared/laravel.sh
@@ -1,9 +1,5 @@
+# The shared Laravel SQL driver body.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/shared/laravel.sh
-# Description : The shared Laravel SQL driver body.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # A service's drivers/laravel.sh sets these and sources this. mysql and
 # postgres only — mongodb is self-contained: a DSN and a config/database.php
 # edit differ in kind from these decomposed credentials.
@@ -16,7 +12,7 @@
 #                        needs beyond DB_CONNECTION, e.g. DB_HOST/DB_PORT
 
 service_driver_apply() {
-  if [ -n "$LARAVEL_PACKAGE" ]; then
+  if [[ -n "$LARAVEL_PACKAGE" ]]; then
     composer require "$LARAVEL_PACKAGE" --no-interaction || return 1
   fi
 
@@ -36,11 +32,18 @@ service_driver_apply() {
   # empty and laravel refuses to boot.
   write_env_lines "${SCAFFOLD_PROJECT_ROOT}/example.env" "APP_KEY=changeme" || return 1
 
-  # Spliced here rather than shipped in the route, so the file carries exactly
-  # one probe, for the connection this project actually has.
-  #
-  # The class arrives as a short name with its own `use`: pint's
-  # fully_qualified_strict_types rejects an inline FQCN once the file has imports.
+  splice_laravel_probe || return 1
+}
+
+service_driver_dockerfile() {
+  [[ -z "$LARAVEL_SETUP" ]] || printf '%s\n' "$LARAVEL_SETUP"
+}
+
+# Spliced here rather than shipped in the route, so the file carries exactly
+# one probe, for the connection this project actually has. The class arrives
+# as a short name with its own `use`: pint's fully_qualified_strict_types
+# rejects an inline FQCN once the file has imports.
+splice_laravel_probe() {
   sed -i.bak 's|use Illuminate\\Support\\Facades\\Route;|use Illuminate\\Support\\Facades\\DB;\nuse Illuminate\\Support\\Facades\\Route;|' \
     routes/health.php || return 1
   sed -i.bak 's|// @DB_PROBE@|DB::connection()->select(\x27select 1\x27);|' \
@@ -58,10 +61,6 @@ service_driver_apply() {
     die "could not splice the database probe into routes/health.php — has the anchor moved?"
 }
 
-service_driver_dockerfile() {
-  [ -z "$LARAVEL_SETUP" ] || printf '%s\n' "$LARAVEL_SETUP"
-}
-
 # config/database.php defaults to sqlite, so DB_CONNECTION's absence is a
 # silent wrong answer, not an error. Credentials reach the container through
 # compose.yaml's env_file already; only what laravel cannot otherwise know goes here.
diff --git a/services/shared/nest.sh b/services/shared/nest.sh
index 98f3f01..779780e 100644
--- a/services/shared/nest.sh
+++ b/services/shared/nest.sh
@@ -1,9 +1,5 @@
+# The shared Prisma driver body.
 # shellcheck shell=bash
-# ═══════════════════════════════════════════════════════════════════════════
-# Script      : services/shared/nest.sh
-# Description : The shared Prisma driver body.
-# Author      : ttncode
-# ═══════════════════════════════════════════════════════════════════════════
 # A service's drivers/nest.sh sets the parameters below and sources this. One
 # client API across every database this toolbox ships is why Prisma was chosen
 # over TypeORM — the adapter x service matrix collapses to a single code path.
@@ -17,9 +13,8 @@
 service_driver_apply() {
   # Before the installs, not after: prisma, its engines and its client all place
   # the query engine binary through an install-time script with no pure-js
-  # fallback, and undecided the first `pnpm add` below is refused with
+  # fallback, and unset the first `pnpm add` below is refused with
   # ERR_PNPM_IGNORED_BUILDS wherever CI=true leaves pnpm no prompt.
-  #
   # SCAFFOLD_PROJECT_ROOT, not a fixed `../..`: cmd_add's app directory is
   # caller-chosen.
   if ! yq --inplace \
@@ -54,22 +49,25 @@ EOF
 
   write_env_lines .env.example "DATABASE_URL=${PRISMA_URL}" || return 1
 
-  # prisma has no provider-agnostic read: $queryRaw is SQL-only, mongodb needs a
-  # command, and a generated client only has the one method its provider
-  # implies — casting to the other fails tsc's "sufficient overlap" check.
-  #
-  # Cast to an explicit method signature, not a bare `import(...).then(...)`:
-  # lint runs before the :prisma task, so the generated client does not exist
-  # yet and an untyped access to it is `any`, which @typescript-eslint's
-  # no-unsafe-* rules reject under --max-warnings 0.
-  #
-  # The throw is replaced in place, not left below the probe: no-unreachable is
-  # in eslint's recommended set. A --db none project keeps the throw.
-  #
-  # The client is a field on HealthController, not a local inside ready(): a
-  # controller is a Nest singleton, and a PrismaClient built per request and
-  # never closed leaks one connection per poll — measured exhausting Postgres's
-  # max_connections inside an hour at a 10s probe interval.
+  splice_nest_probe || return 1
+}
+
+# prisma has no provider-agnostic read: $queryRaw is SQL-only, mongodb needs a
+# command, and a generated client only has the one method its provider
+# implies — casting to the other fails tsc's "sufficient overlap" check. Cast
+# to an explicit method signature, not a bare `import(...).then(...)`: lint
+# runs before the :prisma task, so the generated client does not exist yet and
+# an untyped access to it is `any`, which @typescript-eslint's no-unsafe-*
+# rules reject under --max-warnings 0.
+#
+# The throw is replaced in place, not left below the probe: no-unreachable is
+# in eslint's recommended set. A --db none project keeps the throw.
+#
+# The client is a field on HealthController, not a local inside ready(): a
+# controller is a Nest singleton, and a PrismaClient built per request and
+# never closed leaks one connection per poll — measured exhausting Postgres's
+# max_connections inside an hour at a 10s probe interval.
+splice_nest_probe() {
   local method field preamble probe
   # shellcheck disable=SC2016 # literal TypeScript spliced into the generated controller
   case "$PRISMA_PROVIDER" in