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bvandeusenandClaude Opus 5 d49e4ad106 refactor(tests): derive the two duplicated test helpers into tests/helpers.py (#4276)
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Derive-first, ahead of the tests shape pay-down. An AST pass over all 2628
definitions under `tests/` found exactly three helper bodies duplicated
across files. Two are real copies and are consolidated here; the third is
not, and is left alone.

`need_tools(*tools)` — byte-identical in three hook-test modules, each
skipping when `jq`/`awk`/`git` is absent from PATH. Now snippet #4277. The
`import shutil` each file carried existed only to serve it and goes with it.

`rule_row(rule_id)` — byte-identical in two integration modules, reading a
Rule back through a SEPARATE session so the assertion is about what Postgres
holds rather than what the writing session's identity map remembers. Now
snippet #4278. Its imports are lazy, because `tests/helpers.py` is imported
by unit tests that have no database, which is the same reason
`plugin_config` defers its service imports.

NOT consolidated: `_side(uid, k, d="")` in test_services_plugin_context and
test_write_path_trigger. The body is identical but it closes over a
module-local `stored` dict, so it is not self-contained and "moving" it
would mean inventing a parameter neither call site wants. That is convention
plumbing — two tests independently writing the same one-line side_effect —
and it is dismissed in the ledger rather than lifted.

Worth recording for the next pass: a repeated NAME is not a family. `_row`
is defined in five modules and only two of those share a body; the other
three (test_list_rows_brief, test_calibration_stamp, test_shape_ledger)
build entirely different objects. Grouping by name would have consolidated
three things that have nothing in common.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01821k5B3Ysecp9fNYs92Kuy
2026-09-21 18:27:05 -04:00
bvandeusenandClaude Opus 5 fdfb2d94ac feat(plugin): you altered the shape of something — here is everything that reads it (#4215)
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Milestone 419 step 4. Five of the milestone's seven misses were the same move:
acting on the thing in hand without reading the contract around it. Lesson
#4207 says so in words, and was written by its author hours before a
structurally identical mistake, having been surfaced twice in the turns
between. Text delivered at the moment of acting is too weak a carrier for a
reflex that has to change what the act IS. This looks it up instead.

Rule 33 one scope down: its checks are between layers, and the same question
exists between a definition and its callers.

THREE KINDS OF EXPOSED NAME, because a contract breaks three ways that look
nothing alike in source — the defined symbol (a rename or removal), its
parameter names (arity), and the quoted keys of its dict literals (the shape
of what it returns).

THE THIRD IS THE ONE A SIGNATURE-WATCHER MISSES, and it is in because of the
miss that produced this step. Two commits ago `get_writepath_config` gained
one dict key; three arms read that dict inside a fail-open `except`, every one
silently became a no-op, and ten tests went red with nothing pointing at the
cause. No signature changed. Run against that exact edit, the check now names
tests/helpers.py — the actual root cause — among six files, before the write.

TWO GATES, AND THE SECOND IS WHAT MAKES IT USABLE. A change to the exposed set
is necessary but not sufficient: a definition nothing else references has no
contract to break, so the readers lookup runs second and an empty result ends
it silently. Body-only edits say nothing, a subject is named once per session,
and the ledger lives in the swept directory under the `.ids` convention, so
the existing compaction-clear guards cover it — checked against
test_session_ledger_clear's own parsers rather than assumed.

LOCAL AND SERVERLESS, like the duplicate-name arm beside it. It needs the
working tree and nothing else; the server has no checkout, so this is the only
place the question can be asked. It is a NUDGE: scribe_prior_art.sh still
returns no permissionDecision, which is the operator's recorded decision that
a recall aid may not stand in the way of a write. A test asserts that here as
well as in test_write_path_trigger.py, because this is the arm most likely to
tempt someone into making it a gate — it reports something that may already be
broken.

The `sym` half delegates to `scribe_defs` rather than repeating its patterns:
those cover nine languages and have been corrected several times, and a second
copy would inherit today's version and quietly stop agreeing with it (#3497).

Verified by lifting the test file's own helpers and driving all 19 cases
against the real shell over a fixture git repo. Two of my own errors were
caught that way and are fixed: the fixtures were arriving as single lines
because Python `repr` inside bash single quotes leaves `\n` as two characters
(the extractor is line-oriented, so the tests would have gone green against
input no editor can produce), and the no-readers case put its subject in a
file that was not the excluded one, so it had a reader and tested the
opposite of its name.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01821k5B3Ysecp9fNYs92Kuy
2026-09-21 00:43:29 -04:00