ephemeral-context

A working reference for cleaning and reshaping tabular / CSV data — robust reading, type coercion, dedupe, reshape, join, and the encoding traps. Load it for a data task, then drop it.

A working reference for building and debugging regular expressions — anchors, classes, quantifiers, groups, lookarounds, ready-made patterns, and the common traps. Load it to write a pattern, then drop it.

How to phrase and format every reply — lead with the answer, stay concise, plain prose. A behavioral skill, so keep it active for the whole session.