[autoresearch] baseline: system prompt quality tests (5/5 passing)

.agents/skills/perf-optimization/languages/python.md

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+# Python Performance Profiling
+
+> **Stub:** This module will be populated when Python profiling is needed in a project.
+> Follow the pattern established in [go.md](go.md).
+
+## Expected Content
+
+- Toolchain: `py-spy`, `cProfile`, `memory_profiler`, `line_profiler`, `scalene`
+- Patterns: `__slots__`, generator expressions, `collections.deque`, `numpy` vectorization
+- Benchmarking: `timeit`, `pytest-benchmark`
+- Irreducible floors: GIL contention, interpreter overhead, C extension boundaries
+- Script: `scripts/python-pyspy.sh`