feat(check): make check fails when a service imports another service's sdk at startup

README.md

@@ -2,7 +2,9 @@
 
 Copier template for a Python backend, either as a `backend/` part next to other parts or alone at the root of the project (`layout`): a uv project with one Docker image and one `python -m <module>` entrypoint per service (`api`, `bot`, `userbot`, `worker`, `scheduler`), pydantic-settings, rich logging, optional Dishka, MongoDB or PostgreSQL, Redis, taskiq (in-memory, Redis or PostgreSQL broker), CryptoPay, pydantic-ai and a DynamicConfig stored in the database.
 
-Ships `backend/docker-compose.yml` with root-relative paths and profiles per service, `docker-compose.override.yml.example` (published ports and the `caddy` network aliases, copied by `make env`), a `Makefile` with `fmt`, `check`, `build` and service-specific targets, `.env.example` and `CLAUDE.md`. Applied on top of the `infra` template, `layout: parts` or `layout: single` respectively.
+Ships `backend/docker-compose.yml` with root-relative paths and profiles per service, `docker-compose.override.yml.example` (published ports and the `caddy` network aliases, copied by `make env`), a `Makefile` with `fmt`, `check` (ruff, ty and `scripts/check_imports.py`, which keeps each service from importing the others' SDKs at startup), `build` and service-specific targets, `.env.example` and `CLAUDE.md`. Applied on top of the `infra` template, `layout: parts` or `layout: single` respectively.
+
+`DB__HOST`/`DB__PORT` and `REDIS__HOST`/`REDIS__PORT` say where the service really is. The bundled container takes the host as its network alias and listens on the port, the override publishes it on the machine. For an external database, point them at it and leave its profile out of `COMPOSE_PROFILES`.
 
 ```sh
 copier copy --trust -d project_name="My Thing" <this-repo> <dest>

template/ty.toml.jinja

@@ -2,4 +2,4 @@
 python = "{{ prefix }}.venv"
 
 [src]
-exclude = ["{{ prefix }}migrations"]
+exclude = ["docs", "{{ prefix }}migrations"]

template/{{ part_dir }}/.env.example.jinja

@@ -2,9 +2,9 @@
 {%- if layout == 'root' %}{% set _ = groups.append(["COMPOSE_PROFILES=" ~ ("external," if database != 'none' or use_redis else "") ~ "services"]) %}{% endif -%}
 {%- set _ = groups.append(["RUN_ENVIRONMENT=prod", "TZ=UTC"]) -%}
 {%- set _ = groups.append(["LOG__LEVEL=INFO", "LOG__LEVEL_EXTERNAL=WARNING", "LOG__SHOW_TIME=false", "LOG__CONSOLE_WIDTH=150"]) -%}
-{%- if database == 'mongo' %}{% set _ = groups.append(["DB__HOST=mongodb", "DB__PORT=27017", "DB__USER=" ~ project_slug, "DB__PASSWORD=" ~ project_slug, "DB__DB_NAME=" ~ project_slug]) %}{% endif -%}
+{%- if database == 'mongo' %}{% set _ = groups.append(["DB__HOST=mongodb", "DB__PORT=27017", "DB__USER=" ~ project_slug, "DB__PASSWORD=" ~ project_slug, "DB__DB_NAME=" ~ project_slug, "DB__SCRIPTS_CONNECTION_URL=mongodb://" ~ project_slug ~ ":" ~ project_slug ~ "@localhost:27017/" ~ project_slug ~ "?authSource=admin"]) %}{% endif -%}
-{%- if database == 'postgres' %}{% set _ = groups.append(["DB__HOST=postgres", "DB__PORT=5432", "DB__USER=" ~ project_slug, "DB__PASSWORD=" ~ project_slug, "DB__DB_NAME=" ~ project_slug]) %}{% endif -%}
+{%- if database == 'postgres' %}{% set _ = groups.append(["DB__HOST=postgres", "DB__PORT=5432", "DB__USER=" ~ project_slug, "DB__PASSWORD=" ~ project_slug, "DB__DB_NAME=" ~ project_slug, "DB__SCRIPTS_CONNECTION_URL=postgresql://" ~ project_slug ~ ":" ~ project_slug ~ "@localhost:5432/" ~ project_slug]) %}{% endif -%}
-{%- if use_redis %}{% set _ = groups.append(["REDIS__HOST=redis", "REDIS__PORT=6379", "REDIS__CACHE_TTL=300"]) %}{% endif -%}
+{%- if use_redis %}{% set _ = groups.append(["REDIS__HOST=redis", "REDIS__PORT=6379", "REDIS__CACHE_TTL=300", "REDIS__SCRIPTS_CONNECTION_URL=redis://localhost:6379/0"]) %}{% endif -%}
 {%- if 'api' in backend_services %}{% set _ = groups.append(["API__HOST=0.0.0.0", "API__PORT=8080", "API__WORKERS=1", "API__DOCS=false"]) %}{% endif -%}
 {%- if 'aiogram_bot' in backend_services %}{% set _ = groups.append(["BOT__TOKEN="]) %}{% endif -%}
 {%- if include_payments %}{% set _ = groups.append(["CRYPTO_PAY__TOKEN="]) %}{% endif -%}

template/{{ part_dir }}/Makefile.jinja

@@ -4,10 +4,23 @@
 {%- if 'taskiq_worker' in backend_services %}{% set _ = svc_modules.append("worker") %}{% endif -%}
 {%- if 'kurigram_userbot' in backend_services %}{% set _ = svc_modules.append("userbot") %}{% endif -%}
 {%- if 'scheduler' in backend_services and 'taskiq_worker' not in backend_services %}{% set _ = svc_modules.append("scheduler") %}{% endif -%}
+{%- set app_services = [] -%}
+{%- if 'api' in backend_services %}{% set _ = app_services.append("api") %}{% endif -%}
+{%- if 'aiogram_bot' in backend_services %}{% set _ = app_services.append("bot") %}{% endif -%}
+{%- if 'taskiq_worker' in backend_services %}{% set _ = app_services.append("worker") %}{% endif -%}
+{%- if 'kurigram_userbot' in backend_services %}{% set _ = app_services.append("userbot") %}{% endif -%}
+{%- if 'scheduler' in backend_services %}{% set _ = app_services.append("scheduler") %}{% endif -%}
 {%- set has_script = dynamic_config and svc_modules -%}
-COMPOSE := docker compose{% if layout == 'part' %} --project-directory ..{% endif %}
+{%- set has_scripts = dynamic_config or 'kurigram_userbot' in backend_services -%}
-
+COMPOSE := {% if layout == 'part' %}cd .. && {% endif %}docker compose
-.PHONY: {% if layout == 'root' %}env recreate rebuild restart logs down {% endif %}fmt check build{% if database == 'postgres' %} migrate revision{% endif %}{% if has_script %} script{% endif %}{% if 'kurigram_userbot' in backend_services %} session{% endif %}
+{% if svc_modules %}IMAGE := {{ project_slug }}/backend
+IMAGE_INPUTS := pyproject.toml uv.lock Dockerfile
+CODE := src{% if has_scripts %} scripts{% endif %}{% if serve_spa %} ../frontend{% endif %}
+SERVICES := {{ app_services | join(' ') }}
+changed = ! git diff --quiet $(1) -- $(2) 2>/dev/null
+stamp = { git update-ref $(1) HEAD 2>/dev/null || true; }
+{% endif %}
+.PHONY: {% if layout == 'root' %}env recreate rebuild restart logs down deploy {% endif %}fmt check{% if svc_modules %} build pre-deploy post-deploy{% endif %}{% if database == 'postgres' %} migrate revision{% endif %}{% if has_script %} script{% endif %}{% if 'kurigram_userbot' in backend_services %} session{% endif %}
 
 fmt:
 	uv run ruff format
@@ -17,13 +30,35 @@ check:
 	uv run ruff format --check
 	uv run ruff check
 	uv run ty check
-
+{% if svc_modules %}	uv run python scripts/check_imports.py
+{% endif %}{% if svc_modules %}
 build:
 	$(COMPOSE) build {{ svc_modules[0] }}
-{% if layout == 'root' %}
+
+pre-deploy:
+	@if $(call changed,refs/deploy/backend,$(IMAGE_INPUTS)) || ! docker image inspect $(IMAGE) >/dev/null 2>&1; then \
+		$(MAKE) build && $(call stamp,refs/deploy/backend) && $(call stamp,refs/deploy/backend-code); \
+	fi
+{% if database == 'postgres' %}	@$(COMPOSE) config --services | grep -qx postgres && $(COMPOSE) up -d postgres || true
+	$(MAKE) migrate
+{% endif %}
+post-deploy:
+	@if $(call changed,refs/deploy/backend-code,$(CODE)); then \
+		running=$$($(COMPOSE) ps --services --status running | grep -x $(addprefix -e ,$(SERVICES))); \
+		[ -z "$$running" ] || $(COMPOSE) restart $$running; \
+		$(call stamp,refs/deploy/backend-code); \
+	fi
+{% endif %}{% if layout == 'root' %}
 env:
-	@test -f .env || cp .env.example .env
+	@fresh=; test -f .env || { cp .env.example .env; fresh=1; }; \
-	@test -f docker-compose.override.yml || cp docker-compose.override.yml.example docker-compose.override.yml
+	if ! test -f docker-compose.override.yml; then \
+		cp docker-compose.override.yml.example docker-compose.override.yml; \
+		for port in $$(sed -n 's/.*127\.0\.0\.1:\([0-9]*\):.*/\1/p' docker-compose.override.yml | sort -u); do \
+			random=$$((20000 + $$(od -An -N2 -tu2 /dev/urandom) % 40000)); \
+			sed "s/127\.0\.0\.1:$$port:/127.0.0.1:$$random:/" docker-compose.override.yml > docker-compose.override.yml.tmp && mv docker-compose.override.yml.tmp docker-compose.override.yml; \
+			test -z "$$fresh" || { sed "s|localhost:$$port/|localhost:$$random/|" .env > .env.tmp && mv .env.tmp .env; }; \
+		done; \
+	fi
 
 recreate:
 	$(COMPOSE) up -d --force-recreate
@@ -39,16 +74,20 @@ logs:
 
 down:
 	$(COMPOSE) down
-{% endif %}{% if database == 'postgres' %}
+{% if svc_modules %}
+deploy: pre-deploy
+	$(COMPOSE) up -d
+	$(MAKE) post-deploy
+{% endif %}{% endif %}{% if database == 'postgres' %}
 migrate:
-	$(COMPOSE) --profile external run --rm migrator
+	$(COMPOSE) run --rm migrator $(or $(filter-out $@,$(MAKECMDGOALS)),upgrade head)
 
 revision:
-	$(COMPOSE) --profile external run --rm migrator revision --autogenerate -m "$(m)"
+	$(COMPOSE) run --rm migrator revision --autogenerate -m "$(m)"
 {% endif %}{% if has_script %}
 script:
 	@$(COMPOSE) run --rm {{ svc_modules[0] }} scripts.$(word 2,$(MAKECMDGOALS)) $(wordlist 3,$(words $(MAKECMDGOALS)),$(MAKECMDGOALS))
-
+{% endif %}{% if database == 'postgres' or has_script %}
 %:
 	@:
 {% endif %}{% if 'kurigram_userbot' in backend_services %}

template/{{ part_dir }}/docker-compose.override.yml.example.jinja

@@ -11,15 +11,17 @@ services:{% if not entries %} {}{% endif %}
       caddy:
         aliases:
           - {{ dash }}-api
+#    ports:
+#      - "127.0.0.1:8080:${API__PORT}"
 {% elif entry == 'mongodb' %}  mongodb:
-    ports:
+#    ports:
-      - "127.0.0.1:${DB__PORT:-27017}:${DB__PORT:-27017}"
+#      - "127.0.0.1:27017:${DB__PORT}"
 {% elif entry == 'postgres' %}  postgres:
-    ports:
+#    ports:
-      - "127.0.0.1:${DB__PORT:-5432}:5432"
+#      - "127.0.0.1:5432:${DB__PORT}"
 {% elif entry == 'redis' %}  redis:
-    ports:
+#    ports:
-      - "127.0.0.1:${REDIS__PORT:-6379}:6379"
+#      - "127.0.0.1:6379:${REDIS__PORT}"
 {% endif %}{% if not loop.last %}
 {% endif %}{% endfor %}{% if 'api' in backend_services %}
 networks:

template/{{ part_dir }}/docker-compose.yml.jinja

@@ -50,18 +50,18 @@ services:
     environment:
       MONGO_INITDB_ROOT_USERNAME: ${DB__USER}
       MONGO_INITDB_ROOT_PASSWORD: ${DB__PASSWORD}
-    command: mongod --port ${DB__PORT:-27017}
+    command: mongod --port ${DB__PORT}
     volumes:
       - database:/data/db
     healthcheck:
-      test: ["CMD", "mongosh", "--quiet", "--port", "${DB__PORT:-27017}", "--eval", "db.adminCommand('ping')"]
+      test: ["CMD", "mongosh", "--quiet", "--port", "${DB__PORT}", "--eval", "db.adminCommand('ping')"]
       interval: 5s
       timeout: 5s
       retries: 5
     networks:
       database:
         aliases:
-          - ${DB__HOST:-mongodb}
+          - ${DB__HOST}
 {% endif %}
 {%- if database == 'postgres' %}
   postgres:
@@ -72,6 +72,7 @@ services:
       POSTGRES_USER: ${DB__USER}
       POSTGRES_PASSWORD: ${DB__PASSWORD}
       POSTGRES_DB: ${DB__DB_NAME}
+      PGPORT: ${DB__PORT}
     volumes:
       - database:/var/lib/postgresql/data
     healthcheck:
@@ -82,7 +83,7 @@ services:
     networks:
       database:
         aliases:
-          - ${DB__HOST:-postgres}
+          - ${DB__HOST}
 
   migrator:
     build: {{ part_dir }}
@@ -95,6 +96,7 @@ services:
         required: false
 {% endif %}    environment:
       RUN_ENVIRONMENT: prod
+      TZ: ${TZ:-UTC}
     volumes:
       - ./{{ prefix }}src:/app/src
       - ./{{ prefix }}migrations:/app/migrations
@@ -104,6 +106,7 @@ services:
     depends_on:
       postgres:
         condition: service_healthy
+        required: false
     networks:
       database:
 {% endif %}
@@ -112,9 +115,9 @@ services:
     image: redis:7-alpine
     profiles: [redis, external]
     restart: unless-stopped
-    command: ["redis-server", "--appendonly", "yes"]
+    command: ["redis-server", "--port", "${REDIS__PORT}", "--appendonly", "yes"]
     healthcheck:
-      test: ["CMD", "redis-cli", "ping"]
+      test: ["CMD", "redis-cli", "-p", "${REDIS__PORT}", "ping"]
       interval: 5s
       timeout: 5s
       retries: 5
@@ -123,7 +126,7 @@ services:
     networks:
       redis:
         aliases:
-          - ${REDIS__HOST:-redis}
+          - ${REDIS__HOST}
 {% endif %}
 {%- if database != 'none' or use_redis %}
 volumes:

template/{{ part_dir }}/pyproject.toml.jinja

@@ -1,15 +1,15 @@
 {%- set deps = ["pydantic-settings>=2.14.2", "rich>=15.0.0"] -%}
 {%- if use_dishka %}{% set _ = deps.append("dishka>=1.10.1") %}{% endif -%}
-{%- if 'api' in backend_services %}{% set _ = deps.append("fastapi>=0.138.0") %}{% set _ = deps.append("uvicorn[standard]>=0.49.0") %}{% endif -%}
+{%- if 'api' in backend_services %}{% set _ = deps.append("fastapi>=0.139.0") %}{% set _ = deps.append("uvicorn[standard]>=0.50.0") %}{% endif -%}
 {%- if 'aiogram_bot' in backend_services %}{% set _ = deps.append("aiogram>=3.29.0") %}{% endif -%}
 {%- if include_payments %}{% set _ = deps.append("aiosend>=3.0.7") %}{% endif -%}
-{%- if 'kurigram_userbot' in backend_services %}{% set _ = deps.append("anyio>=4.0.0") %}{% set _ = deps.append("kurigram>=2.2.7") %}{% set _ = deps.append("tgcrypto>=1.2.5") %}{% set _ = deps.append("uvloop>=0.21.0") %}{% endif -%}
+{%- if 'kurigram_userbot' in backend_services %}{% set _ = deps.append("anyio>=4.0.0") %}{% set _ = deps.append("kurigram>=2.2.15") %}{% set _ = deps.append("tgcrypto>=1.2.5") %}{% set _ = deps.append("uvloop>=0.21.0") %}{% endif -%}
 {%- if 'taskiq_worker' in backend_services %}{% set _ = deps.append("taskiq>=0.12.4") %}{% if taskiq_broker == 'redis' %}{% set _ = deps.append("taskiq-redis>=1.2.3") %}{% endif %}{% if taskiq_broker == 'postgres' %}{% set _ = deps.append("taskiq-pg>=0.2.0") %}{% endif %}{% endif -%}
 {%- if 'scheduler' in backend_services %}{% set _ = deps.append("apscheduler>=3.11.0") %}{% endif -%}
 {%- if database == 'mongo' %}{% set _ = deps.append("beanie>=2.0.1") %}{% endif -%}
-{%- if database == 'postgres' %}{% set _ = deps.append("sqlmodel>=0.0.38") %}{% set _ = deps.append("asyncpg>=0.31.0") %}{% set _ = deps.append("alembic>=1.18.4") %}{% set _ = deps.append("greenlet>=3.1.0") %}{% endif -%}
+{%- if database == 'postgres' %}{% set _ = deps.append("sqlmodel>=0.0.39") %}{% set _ = deps.append("asyncpg>=0.31.0") %}{% set _ = deps.append("alembic>=1.18.5") %}{% set _ = deps.append("greenlet>=3.5.3") %}{% endif -%}
 {%- if use_redis %}{% set _ = deps.append("redis>=5.2.0") %}{% endif -%}
-{%- if use_llm %}{% set _ = deps.append("pydantic-ai-slim[google]>=2.1.0") %}{% endif -%}
+{%- if use_llm %}{% set _ = deps.append("pydantic-ai-slim[google]>=2.15.0") %}{% endif -%}
 {%- set modules = [] -%}
 {%- if 'api' in backend_services %}{% set _ = modules.append("api") %}{% endif -%}
 {%- if 'aiogram_bot' in backend_services %}{% set _ = modules.append("bot") %}{% endif -%}
@@ -34,7 +34,7 @@ dependencies = [
 ]
 
 [build-system]
-requires = ["uv_build>=0.11.14,<0.12.0"]
+requires = ["uv_build>=0.12.10,<0.13.0"]
 build-backend = "uv_build"
 
 [tool.uv.build-backend]

template/{{ part_dir }}/scripts/{% if 'kurigram_userbot' in backend_services %}session{% endif %}/create.py.jinja

@@ -2,7 +2,7 @@ import asyncio
 
 import anyio
 
-from userbot import PyroClient
+from userbot.modules.client import PyroClient
 
 
 async def main() -> None:

template/{{ part_dir }}/scripts/{% if backend_services %}check_imports.py{% endif %}.jinja

@@ -0,0 +1,60 @@
+import os
+import subprocess
+import sys
+
+HEAVY = ["aiogram", "pyrogram", "fastapi", "google.genai"]
+SERVICES = {
+{%- if 'api' in backend_services %}
+    "api": (["api.app"], {"fastapi"}),
+{%- endif %}
+{%- if 'aiogram_bot' in backend_services %}
+    "bot": ({% if include_payments %}["bot"]{% else %}["bot.common", "bot.handlers"]{% endif %}, {"aiogram"}),
+{%- endif %}
+{%- if 'kurigram_userbot' in backend_services %}
+    "userbot": (["userbot.runner", "userbot.handlers"], {"pyrogram"}),
+{%- endif %}
+{%- if 'taskiq_worker' in backend_services %}
+    "worker": (["worker.broker", "worker.tasks"], {% if 'api' in backend_services %}{"fastapi"}{% else %}set(){% endif %}),
+{%- elif 'scheduler' in backend_services %}
+    "scheduler": (["scheduler"], set()),
+{%- endif %}
+}
+PROBE = """
+import importlib, sys
+for module in sys.argv[1].split(","):
+    importlib.import_module(module)
+print(" ".join(name for name in sys.argv[2:] if name in sys.modules))
+"""
+{%- if 'aiogram_bot' in backend_services %}
+ENV = {**os.environ, "BOT__TOKEN": "1:check"}
+{%- else %}
+ENV = dict(os.environ)
+{%- endif %}
+
+
+def loaded(modules: list[str]) -> tuple[set[str], str]:
+    result = subprocess.run(  # noqa: S603
+        [sys.executable, "-c", PROBE, ",".join(modules), *HEAVY],
+        capture_output=True,
+        text=True,
+        cwd="src",
+        env=ENV,
+        check=False,
+    )
+    error = (result.stderr.strip().splitlines() or ["exit code"])[-1]
+    return set(result.stdout.split()) & set(HEAVY), error if result.returncode else ""
+
+
+def main() -> int:
+    failed = False
+    for service, (modules, allowed) in SERVICES.items():
+        found, error = loaded(modules)
+        extra = sorted(found - allowed)
+        status = error or ("imports " + ", ".join(extra) if extra else "")
+        print(f"{service:10s} {'FAIL: ' + status if status else 'ok'}")
+        failed |= bool(status)
+    return int(failed)
+
+
+if __name__ == "__main__":
+    sys.exit(main())

template/{{ part_dir }}/src/utils/env.py.jinja

@@ -1,3 +1,9 @@
+{%- macro str_field(name, value) -%}
+{%- set line = "    " ~ name ~ ': str = "' ~ value ~ '"' -%}
+{%- if line | length <= 88 or value | length + 10 > 88 %}{{ line }}{% else %}    {{ name }}: str = (
+        "{{ value }}"
+    ){% endif -%}
+{%- endmacro -%}
 {% if database != 'none' or use_redis %}import os
 
 {% endif %}from pydantic import Field{% if database != 'none' or 'aiogram_bot' in backend_services or include_payments or use_llm or use_redis %}, SecretStr{% endif %}
@@ -8,30 +14,35 @@ def is_prod() -> bool:
     return os.getenv("RUN_ENVIRONMENT") == "prod"
 {% endif %}
 
+class Section(BaseSettings):
+    model_config = SettingsConfigDict(extra="ignore")
 
-class LogSettings(BaseSettings):
+
+class LogSettings(Section):
     level: str = "INFO"
     level_external: str = "WARNING"
     show_time: bool = False
     console_width: int = 150
 {% if database == 'mongo' %}
 
-class DatabaseSettings(BaseSettings):
+class DatabaseSettings(Section):
     host: str = "mongodb"
     port: int = 27017
     user: str = "{{ project_slug }}"
     password: SecretStr = SecretStr("{{ project_slug }}")
     db_name: str = "{{ project_slug }}"
     connection_params: str = "?authSource=admin"
+{{ str_field("scripts_connection_url", "mongodb://" ~ project_slug ~ ":" ~ project_slug ~ "@localhost:27017/" ~ project_slug ~ "?authSource=admin") }}
 
     @property
     def connection_url(self) -> str:
-        host = self.host if is_prod() else "localhost"
+        if not is_prod():
+            return self.scripts_connection_url
         password = self.password.get_secret_value()
-        return f"mongodb://{self.user}:{password}@{host}:{self.port}/{self.db_name}{self.connection_params}"
+        return f"mongodb://{self.user}:{password}@{self.host}:{self.port}/{self.db_name}{self.connection_params}"
 {% elif database == 'postgres' %}
 
-class DatabaseSettings(BaseSettings):
+class DatabaseSettings(Section):
     host: str = "postgres"
     port: int = 5432
     user: str = "{{ project_slug }}"
@@ -39,33 +50,37 @@ class DatabaseSettings(BaseSettings):
     db_name: str = "{{ project_slug }}"
     min_pool_size: int = 5
     max_pool_size: int = 20
+{{ str_field("scripts_connection_url", "postgresql://" ~ project_slug ~ ":" ~ project_slug ~ "@localhost:5432/" ~ project_slug) }}
 
     @property
     def connection_url(self) -> str:
-        host = self.host if is_prod() else "localhost"
+        if not is_prod():
+            return self.scripts_connection_url
         password = self.password.get_secret_value()
-        return f"postgresql://{self.user}:{password}@{host}:{self.port}/{self.db_name}"
+        return f"postgresql://{self.user}:{password}@{self.host}:{self.port}/{self.db_name}"
 
     @property
     def async_connection_url(self) -> str:
         return self.connection_url.replace("postgresql://", "postgresql+asyncpg://", 1)
 {% endif %}{% if use_redis %}
 
-class RedisSettings(BaseSettings):
+class RedisSettings(Section):
     host: str = "redis"
     port: int = 6379
     db: int = 0
     password: SecretStr | None = None
     cache_ttl: int = 300
+    scripts_connection_url: str = "redis://localhost:6379/0"
 
     @property
     def url(self) -> str:
-        host = self.host if is_prod() else "localhost"
+        if not is_prod():
+            return self.scripts_connection_url
         auth = f":{self.password.get_secret_value()}@" if self.password else ""
-        return f"redis://{auth}{host}:{self.port}/{self.db}"
+        return f"redis://{auth}{self.host}:{self.port}/{self.db}"
 {% endif %}{% if 'api' in backend_services %}
 
-class ApiSettings(BaseSettings):
+class ApiSettings(Section):
     host: str = "0.0.0.0"  # noqa: S104
     port: int = 8080
     workers: int = 1
@@ -75,16 +90,16 @@ class ApiSettings(BaseSettings):
 {%- endif %}
 {% endif %}{% if 'aiogram_bot' in backend_services %}
 
-class BotSettings(BaseSettings):
+class BotSettings(Section):
     token: SecretStr = SecretStr("")
     admins: list[int] = Field(default_factory=list)
 {% endif %}{% if include_payments %}
 
-class CryptoPaySettings(BaseSettings):
+class CryptoPaySettings(Section):
     token: SecretStr = SecretStr("")
 {% endif %}{% if use_llm %}
 
-class LlmSettings(BaseSettings):
+class LlmSettings(Section):
     model: str = "google-gla:gemini-2.5-flash"
     gemini_api_key: SecretStr = SecretStr("")
 {% endif %}
@@ -111,10 +126,14 @@ class Settings(BaseSettings):
 {%- endif %}
 
     model_config = SettingsConfigDict(
+{%- if layout == 'part' %}
         case_sensitive=False,
-        env_file={% if layout == 'part' %}("../.env", ".env"){% else %}".env"{% endif %},
+        env_file=("../.env", ".env"),
         env_nested_delimiter="__",
         extra="ignore",
+{%- else %}
+        case_sensitive=False, env_file=".env", env_nested_delimiter="__", extra="ignore"
+{%- endif %}
     )
 
 

template/{{ part_dir }}/src/utils/imports.py

@@ -0,0 +1,6 @@
+import asyncio
+from importlib import import_module
+
+
+async def preload(module: str) -> None:
+    await asyncio.to_thread(import_module, module)

template/{{ part_dir }}/src/utils/logging.py.jinja

@@ -1,5 +1,7 @@
 import logging
-
+{% if 'aiogram_bot' in backend_services %}from importlib.util import find_spec
+from pathlib import Path
+{% endif %}
 from rich.console import Console
 from rich.logging import RichHandler
 from rich.traceback import install
@@ -10,8 +12,12 @@ console = Console(width=env.log.console_width, color_system="auto", force_termin
 
 
 def setup_logging() -> None:
-{% if 'aiogram_bot' in backend_services %}    from aiogram.dispatcher import router  # noqa: PLC0415
+{% if 'aiogram_bot' in backend_services %}    aiogram = find_spec("aiogram")
-
+    suppress = (
+        [str(Path(aiogram.origin).parent / "dispatcher")]
+        if aiogram and aiogram.origin
+        else []
+    )
 {% endif %}    logging.basicConfig(
         level=env.log.level_external,
         format="",
@@ -26,7 +32,7 @@ def setup_logging() -> None:
                 omit_repeated_times=False,
                 show_time=env.log.show_time,
                 {%- if 'aiogram_bot' in backend_services %}
-                tracebacks_suppress=[router],
+                tracebacks_suppress=suppress,
                 {%- endif %}
             )
         ],

template/{{ part_dir }}/src/{% if 'api' in backend_services %}api{% endif %}/app.py.jinja

@@ -40,7 +40,8 @@ app.add_middleware(
 )
 
 app.include_router(routers.router)
-{% if serve_spa %}
+{%- if serve_spa %}
+
 spa_dir = Path(env.api.static_dir).resolve()
 if spa_dir.is_dir():
 
@@ -52,6 +53,9 @@ if spa_dir.is_dir():
             headers = IMMUTABLE_HEADERS if immutable else NO_CACHE_HEADERS
             return FileResponse(candidate, headers=headers)
         return FileResponse(spa_dir / "index.html", headers=NO_CACHE_HEADERS)
-{% endif %}
+{%- endif %}
-{% if use_dishka %}setup_dishka(container, app)
+{%- if use_dishka %}
-{% endif %}
+
+{% if serve_spa %}
+{% endif %}setup_dishka(container, app)
+{%- endif %}

template/{{ part_dir }}/src/{% if 'kurigram_userbot' in backend_services %}userbot{% endif %}/__init__.py.jinja

@@ -1,3 +0,0 @@
-from .modules.client import DEVICE_MODEL, PyroClient
-
-__all__ = ["DEVICE_MODEL", "PyroClient"]

template/{{ part_dir }}/src/{% if 'kurigram_userbot' in backend_services %}userbot{% endif %}/handlers/echo.py.jinja

@@ -1,12 +1,11 @@
-from pyrogram import filters, types
+from pyrogram import Client, filters, types
+from pyrogram.handlers import MessageHandler
 
-from userbot import PyroClient
 from utils.logging import logger
 
 
-@PyroClient.on_message(filters.me)
+async def echo(_: Client, message: types.Message) -> None:
-async def echo(_: PyroClient, message: types.Message) -> None:
     logger.info(f"[cyan]me:[/] {message.text}")
 
 
-handlers = echo.handlers
+handlers = [(MessageHandler(echo, filters.me), 0)]

template/{{ part_dir }}/src/{% if 'kurigram_userbot' in backend_services %}userbot{% endif %}/handlers/private/pm_message.py.jinja

@@ -1,13 +1,12 @@
-from pyrogram import filters, types
+from pyrogram import Client, filters, types
+from pyrogram.handlers import MessageHandler
 
-from userbot import PyroClient
 from utils.logging import logger
 
 
-@PyroClient.on_message(filters.private & ~filters.me)
+async def pm_message(_: Client, message: types.Message) -> None:
-async def pm_message(_: PyroClient, message: types.Message) -> None:
     sender = message.from_user.id if message.from_user else "unknown"
     logger.info(f"[green]pm from {sender}:[/] {message.text}")
 
 
-handlers = pm_message.handlers
+handlers = [(MessageHandler(pm_message, filters.private & ~filters.me), 0)]

template/{{ part_dir }}/src/{% if use_dishka %}dependencies{% endif %}/container.py.jinja

@@ -4,11 +4,7 @@
 {%- if database == 'postgres' %}{% set _ = providers.append('RepositoryProvider()') %}{% endif -%}
 {%- if use_redis %}{% set _ = providers.append('RedisProvider()') %}{% endif -%}
 {%- if use_llm %}{% set _ = providers.append('LlmProvider()') %}{% endif -%}
-{%- if 'aiogram_bot' in backend_services %}{% set _ = providers.append('AiogramProvider()') %}{% endif -%}
-{%- if 'api' in backend_services %}{% set _ = providers.append('FastapiProvider()') %}{% endif -%}
 {%- set third = ['from dishka import make_async_container'] -%}
-{%- if 'aiogram_bot' in backend_services %}{% set _ = third.append('from dishka.integrations.aiogram import AiogramProvider') %}{% endif -%}
-{%- if 'api' in backend_services %}{% set _ = third.append('from dishka.integrations.fastapi import FastapiProvider') %}{% endif -%}
 {%- set first = [] -%}
 {%- if dynamic_config %}{% set _ = first.append('from dependencies.providers.config import ConfigProvider') %}{% endif -%}
 {%- if database != 'none' %}{% set _ = first.append('from dependencies.providers.db import DbProvider') %}{% endif -%}

template/{{ part_dir }}/src/{% if use_dishka %}dependencies{% endif %}/providers/{% if use_llm %}llm.py{% endif %}.jinja

@@ -1,14 +1,20 @@
 from dishka import Provider, Scope, provide
 from pydantic_ai import Agent
-from pydantic_ai.models.google import GoogleModel, GoogleModelSettings
-from pydantic_ai.providers.google import GoogleProvider
 
 from utils.env import env
+from utils.imports import preload
 
 
 class LlmProvider(Provider):
     @provide(scope=Scope.APP)
-    def agent(self) -> Agent:
+    async def agent(self) -> Agent:
+        await preload("pydantic_ai.models.google")
+        from pydantic_ai.models.google import (  # noqa: PLC0415
+            GoogleModel,
+            GoogleModelSettings,
+        )
+        from pydantic_ai.providers.google import GoogleProvider  # noqa: PLC0415
+
         model = GoogleModel(
             env.llm.model.split(":", 1)[-1],
             provider=GoogleProvider(api_key=env.llm.gemini_api_key.get_secret_value()),

template/{{ part_dir }}/{% if layout == 'part' %}CLAUDE.md{% endif %}

@@ -5,3 +5,9 @@ ruff format
 ruff check --fix
 ty check
 ```
+
+## Imports
+Every service imports only what it needs to start. `make check` runs `scripts/check_imports.py`, which fails when a service loads a heavy package it is not allowed; `SERVICES` there is the contract, extend it on purpose.
+- Package `__init__` files don't re-export clients or SDKs.
+- An SDK used by one function is imported inside it. On an async path load it first with `await preload("<module>")` from `utils.imports`, so the event loop never waits on the import.
+- Types used in Dishka provider signatures and `FromDishka[...]` stay real top-level imports.

template/{{ part_dir }}/{% if layout == 'root' %}README.md{% endif %}.jinja

@@ -1,5 +1,5 @@
 {%- set targets = [] -%}
-{%- if database == 'postgres' %}{% set _ = targets.append("`make migrate`, `make revision m=\"message\"`") %}{% endif -%}
+{%- if database == 'postgres' %}{% set _ = targets.append("`make migrate` (`make migrate downgrade -1` to roll back), `make revision m=\"message\"`") %}{% endif -%}
 {%- if dynamic_config and backend_services %}{% set _ = targets.append("`make script name`") %}{% endif -%}
 {%- if 'kurigram_userbot' in backend_services %}{% set _ = targets.append("`make session`") %}{% endif -%}
 # {{ project_name }}
@@ -15,4 +15,6 @@ make recreate
 
 `make env` creates `.env` and `docker-compose.override.yml` from their examples. `make recreate` starts the selected profiles, `make rebuild` builds the image first, `make logs`, `make restart` and `make down` do what they say.
 
-`make fmt` formats, `make check` runs ruff and ty.{% if targets %} Also {{ targets | join(", ") }}.{% endif %}
+{% if backend_services %}To deploy, `git pull && make deploy`. It runs `make pre-deploy`, which builds the image only when `pyproject.toml`, `uv.lock` or `Dockerfile` changed{% if database == 'postgres' %} and applies migrations{% endif %}, then `docker compose up -d`, then `make post-deploy`, which restarts the services whose mounted code changed. A deploy system with its own `up` step calls the two hooks around it. What was built and started is remembered as `refs/deploy/*` in the clone.
+
+{% endif %}`make fmt` formats, `make check` runs ruff and ty.{% if targets %} Also {{ targets | join(", ") }}.{% endif %}