Etc Skill — Development skill for Claude Code

etc — an agent skill

"Fix items 1 and 2, then do the rest the same way."

You show a coding agent two or three corrections as examples. It fixes exactly those two or three, reports "done," and hands back a file that still has twenty instances of the thing you just complained about.

This skill fixes that. It turns "and so on" into a working instruction.

It ships as a `SKILL.md` because that's a format some agents load by themselves, but nothing in it is tied to one of them: it's a page of plain Markdown describing a behaviour, and it works in any agent you can give standing instructions to. See [Install](#install).

What it does

When the skill fires, the agent stops treating your examples as a task list and starts treating them as evidence of a rule. Four steps:

1. State the rule in words before editing anything. "You fixed X and Y. The rule I derived: dates use YYYY-MM-DD. It covers 23 more places." A rule that isn't stated doesn't exist — and a stated rule lets you catch a misreading in one line instead of after twenty wrong edits.
2. Search the whole stated scope, not just the convenient part, and show the full list of hits.
3. Sort the hits into three piles — clearly covered, covered-but-different (fix and name the difference), and looks-similar-but-isn't (leave alone and say why). The third pile is the important one: it's the proof the agent understood the rule instead of grepping for lookalikes.
4. Report the rule, not the count. "Fixed 23 files" tells you nothing. "Rule: X. 23 places, all fixed. Three left alone because Y" tells you whether to trust the pass.

It also covers the failure modes around the edges: don't stall waiting for the obvious rule to be confirmed, don't let the rule grow into unrelated cleanup, re-check the examples you were shown (people often fix them only partway), and treat zero findings as a legitimate answer.

When it fires

On any phrase that hands over a pattern inste