synchronize CI pipeline

.gitattributes

@@ -4,6 +4,7 @@
 .gitignore      export-ignore
 AGENTS.md       export-ignore
 composer.*      export-ignore
+Makefile        export-ignore
 phpcs.xml       export-ignore
 phpstan.neon    export-ignore
 README.md       export-ignore

.github/dependabot.yml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+
+  - package-ecosystem: "composer"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/main.yml

@@ -26,7 +26,7 @@ jobs:
         run: "composer validate --strict"
 
   php:
-    name: "PHP ${{ matrix.php-version }} (${{ matrix.dependencies }}) - lint, PHPStan, PHPCS"
+    name: "PHP ${{ matrix.php-version }} (${{ matrix.dependencies }})"
     needs: "composer"
     runs-on: "ubuntu-latest"
     timeout-minutes: 15
@@ -62,8 +62,6 @@ jobs:
       - name: "audit dependencies for known security vulnerabilities"
         if: "matrix.php-version == '8.1'"
         run: "composer audit"
-      - name: "check PHP version"
-        run: "php -v"
       - name: "lint PHP files"
         run: "find src -type f -name '*.php' -print0 | xargs -0 -n1 php -l"
       - name: "run PHPStan"

AGENTS.md

@@ -49,50 +49,48 @@ about a specific extension's behavior belong in the connector repo consuming it
 
 ## Developer Workflows
 
-All commands run inside official PHP Docker images so the host machine does not need a
-local PHP installation. Use PHP 8.1, 8.2, and 8.3 (matching the CI matrix in
-`.github/workflows/main.yml`) for anything version-sensitive (PHPStan, PHP lint).
-If you are behind a proxy, forward `HTTP_PROXY`/`HTTPS_PROXY`/`NO_PROXY` into the
-container whenever the command needs network access (e.g. `composer install`).
+All commands run through the `Makefile` via Docker, so the host machine does not need a
+local PHP installation. Run `make help` for the full target list. Use PHP 8.1, 8.2, and
+8.3 (matching the CI matrix in `.github/workflows/main.yml`) for anything
+version-sensitive (PHPStan, PHP lint). If you are behind a proxy, `install` and `audit`
+already forward `HTTP_PROXY`/`HTTPS_PROXY`/`NO_PROXY`; pass `CA_CERT_FILE=/path/to/ca.pem`
+to trust a corporate proxy root CA inside the container.
 
 ```bash
-# Install/update dependencies (needs network access -> forward proxy settings)
-docker run --rm --init --interactive --tty \
-  --user "$(id -u)":"$(id -g)" \
-  --env HTTP_PROXY --env HTTPS_PROXY --env NO_PROXY \
-  --volume "$(pwd)":/app --workdir /app \
-  composer:2 install
-
-# Run commands from the repository root. PHPUnit is installed (vendor/bin/phpunit), but
-# running it here without a target only shows usage: this package ships reusable abstract
-# tests, not a local suite (no network access needed)
-docker run --rm --init \
-  --user "$(id -u)":"$(id -g)" \
-  --volume "$(pwd)":/app --workdir /app \
-  php:8.1-cli php vendor/bin/phpunit
-
-# Fix code style (run first, uses phpcs.xml, PSR-12 for src/; no network access needed)
-docker run --rm --init \
-  --user "$(id -u)":"$(id -g)" \
-  --volume "$(pwd)":/app --workdir /app \
-  php:8.1-cli php vendor/bin/phpcbf
-
-# Check remaining style issues (no network access needed)
-docker run --rm --init \
-  --user "$(id -u)":"$(id -g)" \
-  --volume "$(pwd)":/app --workdir /app \
-  php:8.1-cli php vendor/bin/phpcs
-
-# Run static analysis for every supported PHP version (no network access needed;
-# --memory-limit=-1 works around the image's low default memory_limit)
-for PHP_VERSION in 8.1 8.2 8.3; do
-  docker run --rm --init \
-    --user "$(id -u)":"$(id -g)" \
-    --volume "$(pwd)":/app --workdir /app \
-    "php:${PHP_VERSION}-cli" php vendor/bin/phpstan analyse --no-progress --memory-limit=-1
-done
+# Install/update dependencies for a given PHP version (set DEPENDENCIES_LOWEST=1 for
+# --prefer-lowest, matching the CI "lowest" matrix job)
+make install PHP_VERSION=8.1
+
+# Syntax-check every .php file in src/, matches CI
+make lint PHP_VERSION=8.1
+
+# Run PHPStan
+make analyze PHP_VERSION=8.1
+
+# Auto-fix code style (run this before "sniff")
+make beautify PHP_VERSION=8.1
+
+# Check code style (uses phpcs.xml, PSR-12 for src/)
+make sniff PHP_VERSION=8.1
+
+# Check dependencies for known vulnerabilities
+make audit
+
+# Run composer validate --strict
+make validate
 ```
 
+There is no `test` Makefile target: PHPUnit is installed (`vendor/bin/phpunit`), but
+running it here without a target only shows usage, since this package ships reusable
+abstract tests, not a local suite. Consumer repositories run the tests via their own
+`make test`.
+
+**Always use these Makefile targets instead of inventing ad-hoc `docker run`/`composer`/
+`php` commands.** If a task needs something the Makefile doesn't expose directly (e.g.
+PHPCS on a single file), take the exact `docker run` invocation from the matching
+Makefile target (image, `DOCKER_USER`, `DOCKER_MOUNT`, env forwarding) and only append
+the extra arguments — don't build the command from scratch.
+
 PHPStan runs at **level 9** (`phpstan.neon`, scans `src/`).
 
 ## Conventions
@@ -110,3 +108,6 @@ PHPStan runs at **level 9** (`phpstan.neon`, scans `src/`).
 - Before changing a mock name or module template expectation, trace all related abstract methods and the `SapRfcModuleMocks::validateId()` path.
 - Before changing JSON fixtures, inspect the matching assertions in `AbstractSapRfcTestCase.php` so types still align with expected PHP values (`DateTime`, `DateInterval`, arrays, decoded hex values).
 - Write documentation, comments, and new code in English to match the repository style.
+- Always run QA/build commands through the `Makefile` targets, not self-invented `docker run`
+  commands. For one-off variants (a single file), base the invocation on the relevant
+  Makefile target and only append the extra arguments.

Makefile

@@ -0,0 +1,91 @@
+SHELL := /bin/sh
+.DEFAULT_GOAL := help
+
+COMPOSER_IMAGE     := composer:2
+COMPOSER_CACHE_DIR := $(HOME)/.cache/composer
+DOCKER_USER        := --user "$$(id -u)":"$$(id -g)"
+DOCKER_MOUNT       := --volume "$$(pwd)":/app --workdir /app
+
+# --prefer-lowest only has an effect on "composer update", not "composer
+# install" (which just reproduces composer.lock) - switch commands so the
+# flag actually does something, matching the CI "lowest" matrix job.
+ifdef DEPENDENCIES_LOWEST
+COMPOSER_INSTALL_CMD := update --prefer-lowest
+else
+COMPOSER_INSTALL_CMD := install
+endif
+
+# Optional: set CA_CERT_FILE to a PEM file (e.g. a corporate proxy root CA)
+# to make it trusted for HTTPS network access inside the containers used by
+# "install" and "audit" (e.g. 'make install PHP_VERSION=8.1 CA_CERT_FILE=/path/to/ca.pem').
+ifdef CA_CERT_FILE
+CA_MOUNT     := --volume "$(CA_CERT_FILE)":/tmp/extra-ca.crt:ro
+CA_TRUST_CMD := cat /etc/ssl/certs/ca-certificates.crt /tmp/extra-ca.crt > /tmp/ca-bundle.pem && export CURL_CA_BUNDLE=/tmp/ca-bundle.pem SSL_CERT_FILE=/tmp/ca-bundle.pem &&
+else
+CA_MOUNT     :=
+CA_TRUST_CMD :=
+endif
+
+.PHONY: help clean check-php-version install lint analyze beautify sniff audit validate
+
+help: ## Show this help
+	@grep -E '^[a-zA-Z_-]+:.*## ' $(MAKEFILE_LIST) | sort | \
+		awk 'BEGIN {FS = ":.*## "}; {printf "  \033[36m%-10s\033[0m %s\n", $$1, $$2}'
+
+clean: ## Remove vendor/ and composer.lock (reset to a fresh checkout)
+	rm -rf vendor composer.lock
+
+check-php-version:
+	@if [ -z "$(PHP_VERSION)" ]; then \
+		echo "Error: PHP_VERSION must be set, e.g. 'make $(MAKECMDGOALS) PHP_VERSION=8.1'." >&2; \
+		exit 1; \
+	fi
+
+install: check-php-version ## Install composer dependencies for PHP_VERSION (set DEPENDENCIES_LOWEST for --prefer-lowest, CA_CERT_FILE for a corporate proxy CA)
+	@mkdir -p "$(COMPOSER_CACHE_DIR)"
+	docker run --rm -t --init $(DOCKER_USER) \
+		--env HTTP_PROXY --env HTTPS_PROXY --env NO_PROXY \
+		--env COMPOSER_CACHE_DIR=/tmp/composer-cache \
+		--volume "$(COMPOSER_CACHE_DIR)":/tmp/composer-cache \
+		$(CA_MOUNT) \
+		$(DOCKER_MOUNT) \
+		$(COMPOSER_IMAGE) sh -c '\
+			$(CA_TRUST_CMD) \
+			composer config platform.php "$(PHP_VERSION)" && \
+			composer $(COMPOSER_INSTALL_CMD) --prefer-dist --no-interaction --no-progress; \
+			status=$$?; \
+			composer config --unset platform.php; \
+			composer config --unset platform 2>/dev/null; \
+			composer config --unset config 2>/dev/null; \
+			if [ $$status -eq 0 ]; then \
+				composer update --lock --no-interaction --no-progress; \
+				status=$$?; \
+			fi; \
+			exit $$status \
+		'
+
+lint: check-php-version ## Syntax-check every .php file in src/ for PHP_VERSION
+	docker run --rm --init $(DOCKER_USER) $(DOCKER_MOUNT) \
+		"php:$(PHP_VERSION)-cli" sh -c "find src -type f -name '*.php' -print0 | xargs -0 -n1 php -l"
+
+analyze: check-php-version ## Run PHPStan for PHP_VERSION
+	docker run --rm -t --init $(DOCKER_USER) $(DOCKER_MOUNT) \
+		"php:$(PHP_VERSION)-cli" php vendor/bin/phpstan analyse --memory-limit=-1
+
+beautify: check-php-version ## Run PHPCBF (auto-fix code style) for PHP_VERSION
+	docker run --rm --init $(DOCKER_USER) $(DOCKER_MOUNT) \
+		"php:$(PHP_VERSION)-cli" php vendor/bin/phpcbf
+
+sniff: check-php-version ## Run PHPCS (code style check) for PHP_VERSION
+	docker run --rm --init $(DOCKER_USER) $(DOCKER_MOUNT) \
+		"php:$(PHP_VERSION)-cli" php vendor/bin/phpcs
+
+audit: ## Run composer audit (checks dependencies for known vulnerabilities; CA_CERT_FILE for a corporate proxy CA)
+	docker run --rm -t --init $(DOCKER_USER) \
+		--env HTTP_PROXY --env HTTPS_PROXY --env NO_PROXY \
+		$(CA_MOUNT) $(DOCKER_MOUNT) \
+		$(COMPOSER_IMAGE) sh -c '$(CA_TRUST_CMD) composer audit'
+
+validate: ## Run composer validate --strict
+	docker run --rm -t $(DOCKER_USER) $(DOCKER_MOUNT) \
+		$(COMPOSER_IMAGE) composer validate --strict

README.md

@@ -4,5 +4,15 @@
 
 This repository contains tests common to all [PHP/SAP][phpsap] implementations.
 
+## Development
+
+All development commands (install, lint, analyze, beautify, sniff, audit, validate)
+run via Docker through the `Makefile`, so no local PHP installation is needed. Run
+`make help` to list all targets. Most targets require `PHP_VERSION`, e.g.:
+
+```sh
+make install PHP_VERSION=8.1
+```
+
 [phpsap]: https://php-sap.github.io
 [license-mit]: https://img.shields.io/badge/license-MIT-blue.svg

composer.json

@@ -16,12 +16,12 @@
     "php": "^8.1",
     "ext-json": "*",
     "phpunit/phpunit": "^9.6.33",
-    "php-sap/interfaces": "^5.1.4",
-    "php-sap/common": "^6.1.3",
-    "php-sap/datetime": "^1.5.1"
+    "php-sap/interfaces": "^5.1.6",
+    "php-sap/common": "^6.2.0",
+    "php-sap/datetime": "^1.5.2"
   },
   "require-dev": {
-    "phpstan/phpstan": "^2.2",
+    "phpstan/phpstan": "^2.2.3",
     "squizlabs/php_codesniffer": "^4.0"
   },
   "autoload": {