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ersatztv/docs/decisions/records/process
timothyandClaude Opus 5 e5996b7c1e
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docs(778): the population was wrong three times — record what finally fixed it
The record said "wrong twice" and drew the lesson "execute the traversal and eyeball
it". The third instance (rglob picking up untracked `.husky/_` shims) shows that was
still the wrong generalisation: every round had executed its traversal, and every round
had an argument for why it was sufficient.

What held was changing the SOURCE, not the walk — `git ls-files` instead of the
filesystem. The index is authoritative, identical for CI and every checkout, and
excludes untracked build output by construction. So the lesson is the one
`testing.guard-derives-population-from-source` already states, one level up: ask what
the authoritative list of these things IS, and if the answer is "whatever the walk
finds", the guard is not finished however carefully the walk is written.

Decisions-Edit: yes

refs #778

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-19 17:54:00 +02:00
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