The guard introduced by #394 matched the literal
sys.modules['custom_components... and therefore never looked at
pure_imports.py, which writes through a variable — the third instance of
the #389 class walked straight past the check created for it.
The guard now inspects the write itself and decides by the key: a whole
literal or the literal head of an f-string is safe unless it starts with
custom_components (that is how tests register homeassistant.*, hp_pure.*
and houseplan.trails); anything else — a variable, a concatenation,
setdefault/update — counts as a violation whenever the file is able to
name the package at all, i.e. contains a custom_components. literal. A
file that never names the package cannot poison it through a variable,
so restoring a snapshot stays legal.
load_pure now removes what it registered. Removing its own name is not
enough: relative imports pull neighbours in, so junction_limits leaves
wall_segment_model and coordinate_canonicalization behind. It removes
the whole custom_components difference accumulated during exec_module,
in a finally, and a repeated call still works.
pure_imports.py is a named exemption of the static guard precisely
because that guard cannot see the cleanup — so the cleanup is proven by
an executable test instead, and the mutant pure-imports-stops-cleaning
reddens it. Both mutants were run by hand.
User-Visible: no
Issue: #398
r6 Medium: AC4 was measurable only on a developer's machine — no
workflow invoked mypy, so a typing regression in any of the six
allowlist modules reached dev unnoticed while the issue claimed
measurable backend quality. Coverage and lint had continuous gates;
typing had a text comparison of a committed list.
The backend job now runs mypy right after ruff, from the same pinned
dependency file (mypy==2.3.1 — an unpinned checker would redden on code
that never changed). The step derives its module list from the
pyproject.toml strict allowlist instead of duplicating it, because a
drifted duplicate is a green step checking the wrong modules, and it
refuses an empty list rather than passing silently.
Guarded twice: a contract test pins all three facts (pinned checker,
a step that really invokes it, list read from pyproject) and the new
typing-gate-stops-running mutant reddens when the invocation is
neutered.
User-Visible: no
Issue: #42
M1: the AC5 scanner parses the (field, code, message) literal tuple in
validation.py structurally instead of naming the two known codes — a
third tuple entry with an unregistered code now fails the registry test
(verified with an injected invalid_ghost_entity_mutant_probe), and a
tuple whose string count is not a multiple of three refuses instead of
guessing.
M2: the backend reuse key now includes its direct job inputs introduced
by this issue — scripts/backend-coverage-baseline.txt (the threshold the
comparison step reads), requirements_test.txt (the pip source) and
pyproject.toml (ruff/mypy config) — verified: the key changes when the
baseline changes and is restored byte-for-byte with the file.
User-Visible: no
Issue: #42
Same defect class as #389: _const() planted bare ModuleType stand-ins
for custom_components(.houseplan) and never removed them, so the HA
harness running later in the same pytest process saw a package without
async_setup — 85 test_ha_* failures with 'No setup or config entry
setup function defined'. const.py imports nothing, so the loader needs
no package context at all: load it by file path under a standalone
module name and leave sys.modules untouched (verified: no
custom_components* keys after _const()).
User-Visible: no
Issue: #42
Tooling: requirements_test.txt becomes the single source of backend CI
dependencies; pyproject.toml configures ruff (E/F/B/I, E501 excluded by
decision) and mypy strict for a grow-only allowlist of six pure modules
(junction_limits annotated to pass). The 42 substantive ruff findings
are fixed — the B023 loop-variable closures bind their variables as
parameter defaults instead of hiding behind noqa, and every remaining
noqa carries a reason (guarded by a test).
Errors: const.ERROR_CODES / ERROR_CODE_FAMILIES formalise the stable
contract; the scanner test proves every emitted code across BOTH paths
(send_error literals; class attrs, literal and variable-passed
MarkerControlError codes, f-string families) is registered and has a
localized message — 22 missing backup.error.* keys added in all four
languages. invalid_passage_fields / invalid_partition_opening_jamb_margin
ship structured JSON details (legacy format read-compat for one beta),
and _errText renders code-first: unknown codes localize, raw English
messages go to the console.
CI: the backend job lints with ruff, refuses a silently skipped HA
harness (import + collect threshold), measures branch coverage over
pure+harness, fails below the committed baseline and uploads
coverage.xml. quality_scale: docs-troubleshooting/examples honestly
done, test-coverage/strict-typing carry staged progress.
User-Visible: yes
Issue: #42
Matysh