Add Handbook.md benchmark tasks

docker/packages/read_file_safe/pyproject.toml

@@ -0,0 +1,20 @@
+[build-system]
+build-backend = "hatchling.build"
+requires = [ "hatchling" ]
+
+[project]
+name = "read-file-safe"
+version = "0.0.1"
+description = """\
+  Safe file reading: binary detection, incremental UTF-8 decode with lossy fallback, byte-offset pagination — never \
+  raises\
+  """
+requires-python = ">=3.13"
+classifiers = [
+  "Programming Language :: Python :: 3 :: Only",
+  "Programming Language :: Python :: 3.13",
+  "Programming Language :: Python :: 3.14",
+]
+dependencies = [
+  "pydantic>=2,<3",
+]