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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":10,"what_a_person_adds":[{"id":"01.38","kind":"H+","where":"The team","measured":"No architecture or design document is in the tree, across 1,298 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":"100 test files / 1,038 source files"}],"observed":{"tests":100,"source":1038,"test_ratio":0.096},"dimension":"02","rationale":"100 test files against 1,038 source files (9.6%). This does not measure whether the tests are good, only whether enough of them exist for the codebase to be changed safely by someone who did not write it — which is exactly the situation after an acquisition."},{"id":"02.24","band":"adequate","layer":"deterministic","title":"5% of recent commits change more than 2,000 lines","signal":"commit_size","weight":"corroborating","evidence":[{"ref":"git log --numstat","kind":"metric","detail":"71 commits over 2,000 lines"}],"observed":{"share":0.051,"commits":1394,"over_2000_lines":71},"dimension":"02","rationale":"71 of 1394 commits in the last 24 months changed over 2,000 lines of code, not counting reformatting, renames, vendored or generated code. A change that size is rarely reviewed line by line. Ask how they were reviewed, and what made them that large."}],"signals_run":16,"conclusive_signals":15,"what_a_person_adds":[{"id":"02.32","kind":"H","where":"The code host's pull request data","question":"Is review real or a rubber stamp? 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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":"03.8","band":"adequate","layer":"deterministic","title":"One person alone changes billing","signal":"critical_path_ownership","weight":"corroborating","evidence":[{"ref":"git log -- <area>","kind":"metric","detail":"sole author over 24 months: billing (20 commits)"}],"observed":{"authors":192,"sole_owned_areas":["billing"]},"dimension":"03","rationale":"In the last 24 months, of 192 contributors, a single person made every change to: billing (20 commits). These are the parts where a mistake is expensive and where knowledge is hardest to rebuild. Ask who else could change them safely tomorrow."},{"id":"03.27","band":"adequate","layer":"deterministic","title":"Regular contributors fell from 19 to 11 in a year","signal":"joiners_and_leavers","weight":"corroborating","evidence":[{"ref":"regular contributors by year","kind":"metric","detail":"19 then 11; 13 stopped committing, 7 began"}],"observed":{"left":13,"joined":7,"regular_last_year":11,"regular_prior_year":19},"dimension":"03","rationale":"13 people who committed regularly the year before made no commits in the last year, and 7 new regular contributors arrived. Ask whether the work they did is still covered."}],"signals_run":10,"conclusive_signals":10,"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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Each one is a maintenance obligation, a supply-chain surface and a potential licence question that transfers with the asset. The count says nothing about whether any given dependency was a good choice; it says how many such choices a buyer inherits."},{"id":"04.19","band":"adequate","layer":"deterministic","title":"12% of bug fixes add or change a test","signal":"fixes_with_tests","weight":"corroborating","evidence":[{"ref":"fix commits touching tests","kind":"metric","detail":"89 of 760"}],"observed":{"fixes":760,"share":0.117,"with_tests":89},"dimension":"04","rationale":"Of 760 fixes in the last 24 months, 89 touched a test. 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A lockfile says which version is installed, not whether the flawed code is reachable from this product, so each needs a look. Most are fixed by an upgrade, and the advisory names the version."},{"id":"05.49","band":"adequate","layer":"deterministic","title":"The production build publishes source maps","signal":"source_maps_shipped","weight":"corroborating","evidence":[{"ref":"packages/sdk/vite.config.mts","kind":"path","path":"packages/sdk/vite.config.mts","detail":"source maps in a production build","line_end":21,"line_start":21}],"observed":{"sites":1},"dimension":"05","rationale":"The build configuration emits source maps for production, so the original source, with its comments and structure, is downloadable by every visitor. 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The impacted element is an unknown function of the file apps/web/server/auth.ts of the com"},{"ref":"GHSA-hjm9-gc55-5hgv","kind":"advisory","detail":"2026-08-01: GHSA-hjm9-gc55-5hgv (low), fixed in 0.33.1:  Non-constant-time comparison in API key and signed-asset-token verification enables timing attacks"},{"ref":"GHSA-4vx2-9j8p-jg8v","kind":"advisory","detail":"2026-08-01: GHSA-4vx2-9j8p-jg8v (moderate), fixed in 0.33.1: Stored XSS in Karakeep via Unsanitized Tag Names and `javascript:` URLs in Netscape Bookmark Export"},{"ref":"GHSA-6mfw-xrw2-h5x3","kind":"advisory","detail":"2026-08-01: GHSA-6mfw-xrw2-h5x3 (moderate): Zod URL validator accepts javascript and data schemes in bookmark creation"}],"observed":{"newest":"2026-08-18","critical":0,"affecting":0,"could_not_tell":2,"last_24_months":13,"sources_failed":[],"known_exploited":0,"high_or_critical":4},"dimension":"05","rationale":"The newest was published on 2026-08-18. A project that publishes advisories is telling its users about its fixes, and the count and pace say how much security work it carries. Whether 2 of them are fixed in the code you ship could not be told from this history: its version is only known to be at least 0.33.2. Answer lives in: the release you run, set against each fixed version.","context_why":"A note that does not affect this rating: it describes the project's advisory record, and no advisory in it is known to affect the surveyed commit."}],"signals_run":34,"conclusive_signals":27,"what_a_person_adds":[{"id":"05.43","kind":"H+","where":"The security owner","measured":"No threat model is in the tree of what looks like a running service.","question":"Does one exist elsewhere, and who owns it?"},{"id":"05.36","kind":"H+","where":"The cloud console","measured":"Infrastructure code (kubernetes/kustomization.yaml) last changed 17 months before the newest commit, while 1,205 commits landed.","question":"Is the infrastructure now changed by hand? 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Every deploy and every node drain is downtime, and the availability the buyer inherits has a ceiling.","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":16,"conclusive_signals":12,"what_a_person_adds":[{"id":"06.19","kind":"H+","where":"The operations team","measured":"Backup or restore tooling is in the tree (packages/db/drizzle/0067_add_backups_table.sql).","question":"Has a restore ever been rehearsed, and how long did it take?"},{"id":"06.10","kind":"H+","where":"The alerting tool and the on-call rota","measured":"No alert rule is defined in the repository.","question":"Where are alerts defined, who receives them, and when did one last fire?"},{"id":"06.29","kind":"H","where":"Pager history and dashboard logs","question":"Are the dashboards opened, the alerts acknowledged and the pages answered?"},{"id":"06.30","kind":"H","where":"Production metrics","question":"Are the service-level objectives actually met?"},{"id":"06.31","kind":"H","where":"Pager exports and interviews","question":"Who carries the pager, and how often does it go off?"},{"id":"06.32","kind":"H","where":"Cloud billing and capacity plans","question":"What does it cost to run, and how much headroom is there?"}]},{"id":"07","band":"not assessable","name":"Fit with the Acquirer","coverage":"none","findings":[],"signals_run":0,"conclusive_signals":0,"what_a_person_adds":[{"id":"07.1","kind":"H+","question":"This is primarily a TypeScript codebase. 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