Field notes
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Short notes about PDFs, Office files, OCR, and the small format decisions that turn a clean pipeline into a debugging session.
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5 publishedSSH Control Paths Include Their DirectoriesA short hashed socket name does not help if the directories above it are long.SSH Probes Can Consume a Piped InstallerWhen a script runs through curl | sh, child processes can read the rest of the script from stdin.Generator Exhaustion in Cached MethodsA bug where caching a generator led to empty results on cache hits. Only the first call after TTL expiry would return data.openpyxl Has a Third Sheet StateI was filtering sheets by `visible` and `hidden`. Turns out Excel has a third state — `veryHidden` — and openpyxl exposes it as-is.Why I Started Publishing NotesWhy I started publishing short, practical notes about systems I have debugged or shipped.