[trissim]

The fixes from B6 (#1195) that main still needs, without its formatting. #1212 took B6's E1 boundary fix and #1214 its CI trigger restructuring; this is the rest. Receipt: docs/refactor/consolidation-20261009/B6d-remaining-fixes.md.

Fixes

"Fails on main" means: this branch's test file run against main's production code (ae6ddace5) fails, and passes here.

Fix	Cause	Fails on main, passes here
Requestless UI-bridge operations pass the connection by keyword	the connection landed in the request slot	test_capabilities.py::test_requestless_ui_bridge_capability_passes_connection_as_connection
A batch stopped while compiling ends cancelled	the stop surfaced as an execution failure	test_execution_control_stop_during_compile.py (2 cases)
Metadata document targets follow the backend's declaration	a virtual backend (OMERO) got a local metadata document	test_function_outputs.py::test_metadata_document_targets_follow_backend_declaration[omero_local]
Catalog leaves out modules whose distributions the package markers exclude (REQUIRED_DISTRIBUTIONS)	Intel macOS excludes openhcs-basicpy, but the catalog imported its module	test_library_registry_discovery.py (7 cases)
Cache preparation uses os.cpu_count() where there is no affinity API	macOS prepared the kernel cache serially	test_preparation_admission.py::test_platform_without_affinity_admits_its_online_cpus
Scalar components are reduced per pixel group	contributors were pooled across runtime planes, dropping site	test_aggregate_source_scope.py::test_axis_varying_between_runtime_planes_is_kept_not_reduced
The one-plane label projection belongs to every plane label mode	it lived only on MatchImageStackLabels	test_singleton_rgb_label_invocation_477.py[SliceAlignedLabels]
Benchmark adapter keeps the imported config's inheritance and the declared output policy	dataclasses.replace froze unset fields; a results path was forced	test_openhcs_adapter.py::test_openhcs_adapter_preserves_declared_main_flow_output_policy
Packaged knowledge recipes are placed by case name within a path budget	installed paths exceeded Windows MAX_PATH	test_build_mcp_knowledge_assets.py (import error on main)
GUI smoke waits for the window's endpoint start, reports the status name, and gives the bridge connection its transport config	the catalog was read before the endpoint existed; the result held a class; U4 left transport_endpoint() called without its config	test_smoke_installed_gui.py (import error on main); the GUI step of smoke_local.sh

No local test separates these from main; the reason is given:

Fix	Cause	Why not shown locally
STEP_INPUT filters match stored source paths	they matched virtual workspace names	B6 found it in the backend-microscope CI jobs; no touched local test fails on main
Passthrough outputs keep their producer's filename qualifier	sibling surfaces merged into one file	same
BaSiC reads metadata through ImagePayload.of	.metadata was read off plain arrays	same
Dataset rows carry the finished execution's error; the demo reads ViewerType.value	the installed demo failed without a reason	installed-demo job only
Measured-run silence is counted from begin_run	server startup counted as execution silence	timing-dependent
mahotas is a core dependency	core catalog modules import it; it sat in an extra	packaging
MCP smoke sends partition_values	G2 renamed wells	wheel-integration job only
Windows: granularity accepts 'L' uint32; custom-function sources are written as bytes; Ctrl+Break stops the CLI; dataset writability is probed by creating a file; .gitattributes keeps committed bytes; test process reaping skips process groups	Windows-only differences	Windows only
Unit session creates its QApplication first; sibling test modules import through tests; a 3.11-invalid f-string	CI's importlib mode and Python 3.11	CI configuration only

Two slips in the interrupted work, fixed here: the theme-method deletion had also removed @singledispatchmethod from OpenHCSMainWindow.on_session_event (the class body failed at the first .register), and one test still named the pre-K1 RuntimePlaneAxis.SOURCE_BINDING.

Dropped as formatting-only or out of scope

• B6's black commits (cf0b8eb8c, f2ae23c97, 2ed28bb32, ae618be9d, 7f5710ae9, 3e089a3f2) and every hunk that only re-wrapped lines.
• The ratchet mixin moves (239953c4c, ab03ba7ba, 24bfafede).
• All docs/source, docs/audits, README.md and validate_docs.py changes (audit re-pins).
• Workflow edits (merged separately as B6c: pull requests run cheap checks; the full CI matrix gates releases #1214) and the pyqt-reactive pin.
• B6's and B6b's receipts; the library version floors (already on main).

Ratchet

OpenHCSMainWindow and PatternGroupExecutionRequest are at their size budget (keeping the window's theme methods gives GodClassExcess +4). The four theme methods had no caller and are deleted (unused, guarded in test_dead_ui_code_guards.py); the passthrough helpers sit on PatternGroupExecutionScope.

Verification (head cccda278e, base 6c1312d36)

• Touched unit and GUI test files: 595 passed.
• smoke_local.sh with the GUI step: smoke rc=0 (7 passed; GUI exit 0).
• guardrails_local.sh: guardrails rc=0 (three ratchets exit 0, 38 passed, nra-r1 "increased": []).
• 30-workflow parity under flock: 1 passed (the test asserts all 30 cases), run with a private HOME so its sockets were not shared. Two earlier runs on the shared socket directory gave 28/30: in each, two cases compiled on a server started from another checkout (the error named that checkout's path), which is the fault B7: an execution client reaches only a server it may use #1211 fixes.
• Touched integration files at -n 2: 36 passed, 3 failed, 1 skipped; two of the three pass serially. The third, test_measured_repetitions_share_one_owned_ordinary_server, failed 3 of 7 runs with "endpoint was already in use" while other agents' servers were running; same fault.

Not verified locally: Windows and macOS paths, the installed demo, the wheel smoke, the real-viewer official30 variants (their test was updated to the viewer families and collects, 92 tests; not run).

B6d · PR #1221 · guards 4/4 · production −256 +524 · tests −263 +877

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