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Size is not a defect on its own — some problems genuinely live in one place — but these are where merge conflicts, review fatigue and single-owner knowledge concentrate, and they are the first thing that slows an inheriting engineer down.","context_why":"A note that does not affect this rating: measured against its own codebase's median, it is below the 85th percentile of 382 surveyed projects' largest files, where this check begins to count."}],"signals_run":11,"conclusive_signals":9,"what_a_person_adds":[{"id":"01.38","kind":"H+","where":"The team","measured":"No architecture or design document is in the tree, across 482 product files.","question":"Where does the design live, and who holds it?"},{"id":"01.39","kind":"H","where":"Your architects, with the product roadmap","question":"Is the architecture right for the next three years of the product?"},{"id":"01.40","kind":"H","where":"The team's reasoning at the time","question":"Were the home-grown components reasonable choices when they were made, and are they now?"}]},{"id":"02","band":"adequate","name":"Engineering Process & SDLC Maturity","coverage":"high","findings":[{"id":"02.3","band":"adequate","layer":"deterministic","title":"Tests cover a thin slice of the codebase","signal":"test_presence","weight":"corroborating","evidence":[{"ref":"test-file-ratio","kind":"metric","detail":"44 test files / 494 source files"}],"observed":{"tests":44,"source":494,"test_ratio":0.089},"dimension":"02","rationale":"44 test files against 494 source files (8.9%). 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What it does establish is that the process is not written down anywhere a new engineer would find it.","context_why":"A note that does not affect this rating: in Borehole's calibration, this check's notes were usually true but overstated."},{"id":"02.16","band":"adequate","layer":"deterministic","title":"Tests are retried until they pass","signal":"flaky_test_markers","weight":"corroborating","context":true,"evidence":[{"ref":"web/playwright.config.js","kind":"path","path":"web/playwright.config.js","detail":"test retry","line_end":30,"line_start":30}],"observed":{"test_retries":0,"suite_retries":1},"dimension":"02","rationale":"The suite is configured to retry failing tests (web/playwright.config.js). A retry turns a flaky test green without saying why it failed, so a green build means the tests passed eventually. 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This is the single most expensive thing to discover after closing, and the repository cannot tell you whether that person is part of the transaction."},{"id":"03.3","band":"adequate","layer":"deterministic","title":"3 of 11 major areas have only ever had one author","signal":"knowledge_silos","weight":"corroborating","context":true,"evidence":[{"ref":"sole-author","kind":"path","path":"mesh/","detail":"1,468 lines added"},{"ref":"sole-author","kind":"path","path":"wsl/","detail":"1,341 lines added"},{"ref":"sole-author","kind":"path","path":"i18n/","detail":"570 lines added"}],"observed":{},"dimension":"03","rationale":"Across 6 contributors, 3 substantial top-level areas have been touched by exactly one person. The headline bus factor does not show this: a team can look well spread in aggregate and still have subsystems that stop moving the day one person stops working on them. For these areas, ask who else can change them today.","context_why":"A note that does not affect this rating: in Borehole's calibration, this check's notes were usually true but overstated."}],"signals_run":10,"conclusive_signals":4,"what_a_person_adds":[{"id":"03.29","kind":"H+","where":"The deal terms","measured":"One contributor authored three-quarters or more of the commits in this history.","question":"Is that person part of the transaction, and for how long after it?"},{"id":"03.28","kind":"H","where":"The team; review history only suggests candidates","question":"Who mentors whom, and would that survive a departure?"},{"id":"03.30","kind":"H","where":"Recruiting data and the org chart","question":"Can the team grow, and who stands behind the top three contributors?"},{"id":"03.31","kind":"H","where":"HR data","question":"Is the seniority mix sound, and will pay survive your salary bands?"},{"id":"03.14","kind":"H","where":"Interviews and on-call history","question":"Is the pace sustainable? 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