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Whatever happened before that commit happened somewhere this repository cannot show you, so the early history is not available as evidence of how the system was designed."},{"id":"01.6","band":"adequate","layer":"deterministic","title":"app/src/main/java/moe/matsuri/nb4a/SingBoxOptions.java is 4,645 lines, 65× this codebase's median file","signal":"oversized_modules","weight":"corroborating","context":true,"evidence":[{"ref":"line-count","kind":"path","path":"app/src/main/java/moe/matsuri/nb4a/SingBoxOptions.java","detail":"4,645 lines (65× median)","line_end":4645,"line_start":1},{"ref":"line-count","kind":"path","path":"app/src/main/java/io/nekohasekai/sagernet/ui/ConfigurationFragment.kt","detail":"1,743 lines (24× median)","line_end":1743,"line_start":1}],"observed":{"largest":4645,"library":{"n":382,"share":64,"value":65.4,"cutoff":138.63,"material":false,"percentile":85},"threshold":1000,"files_over":2,"median_lines":71},"dimension":"01","rationale":"The median source file here is 71 lines. 2 files exceed 1,000 lines, the largest being 4,645. 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."},{"id":"01.15","band":"adequate","layer":"deterministic","title":"34 errors caught and discarded in product code","signal":"swallowed_errors","weight":"corroborating","context":true,"evidence":[{"ref":"app/src/main/java/io/nekohasekai/sagernet/bg/BaseService.kt","kind":"path","path":"app/src/main/java/io/nekohasekai/sagernet/bg/BaseService.kt","detail":"error caught and discarded","line_end":127,"line_start":127},{"ref":"app/src/main/java/io/nekohasekai/sagernet/bg/BaseService.kt","kind":"path","path":"app/src/main/java/io/nekohasekai/sagernet/bg/BaseService.kt","detail":"error caught and discarded","line_end":128,"line_start":128},{"ref":"app/src/main/java/io/nekohasekai/sagernet/bg/GuardedProcessPool.kt","kind":"path","path":"app/src/main/java/io/nekohasekai/sagernet/bg/GuardedProcessPool.kt","detail":"error caught and discarded","line_end":36,"line_start":36}],"observed":{"loc":36950,"files":17,"per_kloc":0.92,"swallowed":34},"dimension":"01","rationale":"34 places catch an error and do nothing with it, across 17 files (0.9 per thousand lines). Each is a failure the system will not report. They surface later as problems nobody can explain, and they are cheap to fix now.","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":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 531 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":"1 test files / 245 source files"}],"observed":{"tests":1,"source":245,"test_ratio":0.004},"unproven":true,"dimension":"02","rationale":"1 test files against 245 source files (0.4%). 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":"02.5","band":"adequate","layer":"deterministic","title":"34% of commit subjects say nothing about the change","signal":"conventional_commits","weight":"corroborating","evidence":[{"ref":"commit-subject-content","kind":"metric","detail":"131/384 low-content subjects (34.1%)"},{"ref":"example","kind":"metric","detail":"'upload code'","verbatim":true},{"ref":"example","kind":"metric","detail":"'cleanup'","verbatim":true},{"ref":"example","kind":"metric","detail":"'update data'","verbatim":true},{"ref":"example","kind":"metric","detail":"'fix'","verbatim":true}],"observed":{},"dimension":"02","rationale":"131 of 384 subjects are either under twelve characters or one of the standard placeholders — wip, fix, update. The history is therefore not usable for reconstructing why a decision was taken, which is the main thing an inheriting engineer needs it for. It says nothing about code quality and a great deal about how much context transfers with the asset."},{"id":"02.6","band":"adequate","layer":"deterministic","title":"Almost no process scaffolding exists in the repository","signal":"branch_protection_hints","weight":"corroborating","context":true,"evidence":[{"ref":"process-scaffolding","kind":"metric","detail":"1 of 5 markers present across 538 tracked files"}],"observed":{},"dimension":"02","rationale":"Of five ordinary markers — CI workflows, CODEOWNERS, a pull-request template, pre-commit hooks, contribution guidance — 1 is present: CI workflows. Branch protection itself is a GitHub setting rather than a file, so this is a reading of proxies and not of the rules themselves. 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."}],"signals_run":16,"conclusive_signals":14,"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":"03.5","band":"adequate","layer":"deterministic","title":"The contributor who wrote more than half of this has not committed here for more than six months","signal":"contributor_attrition","weight":"corroborating","evidence":[{"ref":"last-commit-by-top-author","kind":"metric","detail":"last commit more than six months ago, measured to the survey"},{"ref":"git shortlog -sn","kind":"metric","detail":"top author more than half of 384 commits"}],"observed":{"authors":27,"top_share":"more than half","top_contributor_last_committed":"more than six months ago"},"unproven":true,"dimension":"03","rationale":"One person authored more than half of 384 commits and has not committed here for more than six months, while the repository has kept moving. The concentration figure alone would not show this. Whoever is changing this code now is not the person who wrote most of it, which is the situation an acquirer is usually told they are avoiding. The history shows only that no commits of theirs landed here, not why."}],"signals_run":10,"conclusive_signals":7,"what_a_person_adds":[{"id":"03.29","kind":"H+","where":"The deal terms","measured":"One contributor authored more than half 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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Rework is normal and often healthy, but a rising ratio means an increasing share of the team's time is spent replacing code that already exists rather than building what does not. Whether that is deliberate repayment or churn is a question for the team.","context_why":"A note that does not affect this rating: in Borehole's calibration, this check's notes were usually true but overstated."},{"id":"04.19","band":"adequate","layer":"deterministic","title":"0% of bug fixes add or change a test","signal":"fixes_with_tests","weight":"corroborating","evidence":[{"ref":"fix commits touching tests","kind":"metric","detail":"0 of 36"}],"observed":{"fixes":36,"share":0.0,"with_tests":0},"dimension":"04","rationale":"Of 36 fixes in the last 24 months, 0 touched a test. A fix without the test that would have caught the bug can quietly come back, and the suite never learns from what went wrong."}],"signals_run":19,"conclusive_signals":13,"what_a_person_adds":[{"id":"04.11","kind":"H+","where":"The team","measured":"89 commits landed in the last year, against 34 the year before (+162%).","question":"What drove it: new people, a deadline, or code produced faster than before?"},{"id":"04.32","kind":"H","where":"The data room and the team's record of estimates","question":"Can this team deliver the stated roadmap on the stated timeline?"},{"id":"04.31","kind":"H","where":"Budget and roadmap decisions","question":"Does leadership know about the debt, and is time budgeted to repay it?"},{"id":"04.33","kind":"H","where":"Revenue, customer and churn data","question":"Is the engineering shape consistent with the commercial story?"}]},{"id":"05","band":"adequate","name":"Security & Reliability Posture","coverage":"partial","findings":[{"id":"05.2","band":"adequate","layer":"deterministic","title":"None of the standard security guard rails are configured","signal":"security_guardrails","weight":"corroborating","evidence":[{"ref":"guardrail-scan","kind":"metric","detail":"checked 5 kinds of guard rail across 538 tracked files; 0 present"}],"observed":{},"dimension":"05","rationale":"There is no disclosure policy, no automated dependency updates, no named code owners and no pre-commit configuration. None of these is load-bearing on its own. Their collective absence says that security posture here is whatever the current team happens to remember to do, which is not a posture that survives the team changing."},{"id":"05.26","band":"adequate","layer":"deterministic","title":"1 locked dependency has published vulnerabilities","signal":"known_vulnerabilities","weight":"corroborating","context":true,"evidence":[{"ref":"libcore/go.mod","kind":"path","path":"libcore/go.mod","detail":"github.com/go-chi/chi/v5 v5.2.2: GHSA-j6qf-3m9c-vwj3 (moderate), fixed in 5.4.0"}],"observed":{"advisories":1,"dependencies":70,"high_or_critical":0,"pinned_to_a_commit":0,"ecosystems_not_read":["Gradle"],"vulnerable_packages":1,"set_aside_not_imported":52,"high_or_critical_shipping":0},"dimension":"05","rationale":"1 of 70 locked dependencies match 1 published advisories in OSV. 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. This lockfile pins development tools alongside what ships and does not say which is which, so some of these may never reach a user.","context_why":"A note that does not affect this rating: in Borehole's calibration, this check's notes were usually true but overstated."},{"id":"05.51","band":"adequate","layer":"deterministic","title":"The app allows plain HTTP to any server","signal":"cleartext_traffic","weight":"corroborating","evidence":[{"ref":"app/src/main/res/xml/network_security_config.xml","kind":"path","path":"app/src/main/res/xml/network_security_config.xml","detail":"cleartext allowed app-wide","line_end":3,"line_start":3}],"observed":{"sites":1},"dimension":"05","rationale":"The app's manifest allows unencrypted HTTP app-wide (NSAllowsArbitraryLoads, or cleartext traffic permitted), rather than for named domains. Anything sent over plain HTTP can be read on the network, and enterprise security reviews ask about it. Some apps need it by nature (a podcast or feed reader fetches whatever URL a feed gives), so ask which case this is."}],"signals_run":34,"conclusive_signals":23,"what_a_person_adds":[{"id":"05.52","kind":"H+","where":"The mobile team and the store review history","measured":"The Android app requests 1 sensitive permission: QUERY_ALL_PACKAGES.","question":"Does the product need each one, and has the store's review accepted them?"},{"id":"05.41","kind":"H","where":"Ticketing and chat","question":"What has actually broken, how often, and how badly?"},{"id":"05.42","kind":"H","where":"Reports in the data room","question":"What did external testing find, and was it fixed?"},{"id":"05.44","kind":"H","where":"Audit reports; policy files in the tree are not evidence","question":"What is the SOC 2, ISO 27001 or GDPR status, and where is the evidence?"}]},{"id":"06","band":"not assessable","name":"Observability & Operations","coverage":"partial","findings":[],"signals_run":16,"conclusive_signals":5,"what_a_person_adds":[{"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?"}],"not_assessable_reason":"only 5 of 16 checks could reach a conclusion here; the rest do not apply to this repository or could not read it"},{"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 Kotlin codebase, with Go alongside (16% of source files). Does your engineering organisation already run Kotlin in production, or would this be the first?"},{"id":"07.10","kind":"H+","question":"The bulk of this system sits in app/, libcore/, buildSrc/. Which of your existing systems would each of those have to absorb or replace?"},{"id":"07.2","kind":"H+","question":"Nothing in the repository says how this is deployed. Is it shipped as a library, a binary or a service, and if it runs somewhere, who owns that environment?"},{"id":null,"kind":"H+","question":"What is your tolerance for the findings above remaining unaddressed for the first two quarters after close, given everything else that will compete for this team's time?"},{"id":"07.11","kind":"H","where":"Your architecture","question":"Which of these systems duplicate yours, and which get retired?"},{"id":"07.12","kind":"H","where":"The engagement","question":"What will integration cost, and in what order?"},{"id":"07.13","kind":"H","where":"Your org design","question":"Where does the team land in your organisation, and who reports to whom?"},{"id":"07.14","kind":"H","where":"Deal terms","question":"Are there earn-outs, retention packages or contractor IP to assign?"},{"id":"07.15","kind":"H","where":"Customer contracts","question":"Do customer contracts limit hosting, regions or vendors?"}],"not_assessable_reason":"structurally not assessable 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