initial: add all custom Claude.ai skills

my-python-senior/networking.md

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+# Networking and Async IO Guidelines
+
+## HTTP and APIs
+
+- Use `httpx` or `requests` for simple synchronous HTTP; `httpx` or `aiohttp` for async workflows.
+- Always set:
+  - explicit timeouts
+  - retry policy where appropriate
+  - sane default headers (including User-Agent when needed).
+- Validate responses:
+  - check status codes
+  - handle error body formats gracefully.
+
+## Concurrency and async
+
+- Prefer `asyncio` for high-concurrency IO-bound tasks.
+- Avoid mixing sync and async in confusing ways; when necessary, clearly separate boundaries.
+- Use connection pooling and session reuse instead of creating clients per request.
+
+## Protocols and serialization
+
+- Be explicit about:
+  - encoding (UTF-8 by default)
+  - content types (JSON, protobuf, etc.).
+- For binary protocols or performance-critical paths, consider:
+  - struct packing
+  - memoryviews
+  - minimized copies.
+
+## Robustness
+
+- Handle network errors explicitly:
+  - timeouts
+  - connection errors
+  - transient failures.
+- Implement backoff strategies and circuit breakers where applicable.
+- Log enough context to debug issues without exposing sensitive data.