build: add pyproject.toml with ruff lint/format config and requirements-dev

pyproject.toml

@@ -0,0 +1,28 @@
+[build-system]
+requires = ["setuptools>=61.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "sskj-bench"
+version = "0.1.0"
+description = "Multi-platform LLM serving benchmark framework (sglang/vllm on P800/H20/H200/RTX 6000D)"
+requires-python = ">=3.10"
+dependencies = []
+
+[project.optional-dependencies]
+dev = [
+    "ruff>=0.5.0",
+]
+
+[tool.ruff]
+line-length = 120
+target-version = "py310"
+extend-exclude = ["envs", "experiments/*/results", "experiments/*/runtime", ".tmp_charts"]
+
+[tool.ruff.lint]
+select = ["E", "F", "W", "I", "UP", "B", "SIM", "C4"]
+ignore = ["E501"]
+
+[tool.ruff.format]
+quote-style = "double"
+indent-style = "space"

requirements-dev.txt

@@ -0,0 +1,3 @@
+# Dev tooling for sskj benchmark repo.
+# Runtime Python code uses only the standard library (no runtime deps).
+ruff>=0.5.0