{"band":"adequate","note":"Deterministic layer only. No model calls were made and no source content left this machine.","layer":"deterministic","coverage":{"statement":"A repository answers roughly three and a half of seven dimensions. The rest are reported as not assessable, with the questions a human would ask instead.","languages_read":["1C Enterprise","4D","ABAP","ABAP CDS","AGS Script","AIDL","AL","ALGOL","AMPL","ANTLR","APL","ASL","ASP.NET","ATS","ActionScript","Ada","Agda","Aiken","Aleo","Alloy","AngelScript","Answer Set Programming","Apex","Apollo Guidance Computer","AppleScript","Arc","ArkTS","AspectJ","Assembly","Augeas","AutoHotkey","AutoIt","Awk","B (Formal Method)","B4X","BAML","BQN","Ballerina","Batchfile","Beef","Befunge","Bend","Berry","Bicep","Bison","BitBake","BlitzBasic","BlitzMax","Bluespec","Boo","Boogie","Brightscript","C","C#","C++","C2hs Haskell","C3","CAP CDS","CLIPS","CMake","COBOL","CQL","CWeb","Cadence","Cairo","CameLIGO","Cangjie","Cap'n Proto","Carbon","CartoCSS","Ceylon","Chapel","Charity","ChucK","Circom","Cirru","Clarion","Clarity","Classic ASP","Clean","Click","Clojure","Clue","CodeQL","CoffeeScript","ColdFusion","ColdFusion CFC","Common Lisp","Common Workflow Language","Component Pascal","Crystal","Csound","Csound Document","Csound Score","Cuda","Curry","Cycript","Cypher","Cython","D","DIGITAL Command Language","DM","Dafny","Dart","Daslang","DataWeave","Dhall","Dockerfile","Dogescript","Dylan","E","ECL","EQ","EdgeQL","Elixir","Elm","Elvish","Emacs Lisp","EmberScript","Erlang","F#","F*","FIRRTL","FLUX","FPP","Factor","Fancy","Fantom","Fennel","Filebench WML","Flix","Fluent","Forth","Fortran","Fortran Free Form","FreeBASIC","FreeMarker","Futhark","G-code","GAML","GAMS","GAP","GDB","GDScript","GDShader","GLSL","GSC","Genero 4gl","Genshi","Gentoo Ebuild","Gentoo Eclass","Gherkin","Gleam","Glimmer JS","Glimmer TS","Glyph","Gno","Gnuplot","Go","Golo","Gosu","Grace","Grammatical Framework","Groovy","Groovy Server Pages","HCL","HIP","HLSL","Hack","Harbour","Hare","Haskell","Haxe","HiveQL","HolyC","Hurl","Hy","IDL","IGOR Pro","IL Assembly","ISPC","Idris","ImHex Pattern Language","ImageJ Macro","Imba","Inform 7","Ink","Inno Setup","Io","Ioke","Isabelle","J","JASS","JCL","JFlex","JSONiq","Jac","Jai","Janet","Java","Java Server Pages","Java Template Engine","JavaScript","JavaScript+ERB","JetBrains MPS","Jison","Jison Lex","Jolie","Jsonnet","Julia","Just","KCL","KRL","Kaitai Struct","KakouneScript","Koka","Kotlin","LFE","LLVM","LLVM TableGen","LOLCODE","LSL","LabVIEW","Langium","Lasso","Lean","Leo","Lex","LigoLANG","LilyPond","Linker Script","Liquidsoap","Literate Agda","Literate CoffeeScript","Literate Haskell","LiveCode Script","LiveScript","Lobster","Logos","Logtalk","LookML","Lua","Luau","M","M4","MATLAB","MAXScript","MLIR","MQL4","MQL5","MUF","Macaulay2","Makefile","Mako","Max","MeTTa","Mercury","Metal","MiniD","MiniZinc","Mint","Mirah","Modelica","Modula-3","Module Management System","Mojo","Monkey","MoonBit","MoonScript","Motorola 68K Assembly","Move","Myghty","NASL","NSIS","NWScript","Nearley","NetLinx","NetLinx+ERB","NetLogo","Nextflow","Nim","Nit","Nix","Nu","NumPy","OCaml","OMNeT++ NED","Oberon","Objective-C","Objective-C++","Objective-J","Odin","Omgrofl","Opa","Opal","Open Policy Agent","OpenCL","OpenQASM","OpenSCAD","OverPy","OverpassQL","Ox","Oxygene","Oz","P4","PDDL","PEG.js","PHP","PLSQL","PLpgSQL","POV-Ray SDL","Pact","Pan","Papyrus","Parrot","Parrot Assembly","Parrot Internal Representation","Pascal","Pawn","Pep8","Perl","PigLatin","Pike","PogoScript","Polar","Pony","Portugol","Power Query","PowerBuilder","PowerShell","Praat","Processing","Prolog","Promela","Propeller Spin","Puppet","PureBasic","PureScript","Pyret","Python","Q#","QML","QMake","QuakeC","Quint","R","RAScript","REALbasic","REXX","RPGLE","Racket","Ragel","Raku","Rascal","ReScript","Reason","ReasonLIGO","Rebol","Red","Redcode","RenderScript","Rhai","Ring","RobotFramework","Roc","Rocq Prover","Rouge","Ruby","Rust","SAS","SMT","SQF","SQL","SQLPL","SWIG","Sage","Sail","Salt","Scala","Scenic","Scheme","Scilab","Self","Shell","ShellSession","Shen","Sieve","Slang","Slash","SmPL","Smali","Smithy","Snakemake","Solidity","SourcePawn","Squirrel","Stan","Standard ML","Starlark","Stata","SurrealQL","Swift","SystemVerilog","TI Program","TL-Verilog","TLA","TSX","TXL","Tact","Talon","Tape","Tcl","Tcsh","Thrift","Toit","Tolk","Turing","TypeScript","Unified Parallel C","Uno","UnrealScript","Untyped Plutus Core","UrWeb","VBA","VBScript","VCL","VHDL","Vala","Verilog","Verse","Vim script","Visual Basic .NET","Visual Basic 6.0","Volt","Vyper","WDL","WGSL","WebAssembly","WebIDL","Whiley","Witcher Script","Wolfram Language","Wollok","Wren","X10","XC","XProc","XQuery","XS","XSLT","Xojo","Xonsh","Xtend","YARA","Yacc","Yul","ZAP","ZIL","Zeek","ZenScript","Zephir","Zig","Zimpl","eC","fish","hoon","mIRC Script","mcfunction","mupad","nesC","ooc","sed","wisp","xBase"],"total_dimensions":7,"assessable_dimensions":6},"dimensions":[{"id":"01","band":"strong","name":"Architecture & Codebase — including AI provenance","coverage":"full","findings":[{"id":"01.6","band":"adequate","layer":"deterministic","title":"legacy/core/src/main/java/com/fsck/k9/controller/MessagingController.java is 2,892 lines, 62× this codebase's median file","signal":"oversized_modules","weight":"corroborating","context":true,"evidence":[{"ref":"line-count","kind":"path","path":"legacy/core/src/main/java/com/fsck/k9/controller/MessagingController.java","detail":"2,892 lines (62× median)","line_end":2892,"line_start":1},{"ref":"line-count","kind":"path","path":"legacy/ui/legacy/src/main/java/com/fsck/k9/ui/messagelist/LegacyMessageListFragment.kt","detail":"2,728 lines (59× median)","line_end":2728,"line_start":1},{"ref":"line-count","kind":"path","path":"legacy/ui/legacy/src/main/java/com/fsck/k9/ui/messagelist/MessageListFragment.kt","detail":"2,683 lines (58× median)","line_end":2683,"line_start":1},{"ref":"line-count","kind":"path","path":"ui-utils/linear-layout-manager/src/main/java/app/k9mail/ui/utils/linearlayoutmanager/LinearLayoutManager.java","detail":"2,412 lines (52× median)","line_end":2412,"line_start":1},{"ref":"line-count","kind":"path","path":"ui-utils/item-touch-helper/src/main/java/app/k9mail/ui/utils/itemtouchhelper/ItemTouchHelper.java","detail":"2,373 lines (51× median)","line_end":2373,"line_start":1}],"observed":{"largest":2892,"library":{"n":382,"share":63,"value":62.9,"cutoff":138.63,"material":false,"percentile":85},"threshold":1000,"files_over":13,"median_lines":46},"dimension":"01","rationale":"The median source file here is 46 lines. 13 files exceed 1,000 lines, the largest being 2,892. 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":"The tree carries design documentation (docs/architecture/README.md and 24 more).","question":"Does it match what the team believes today? Ask them to walk through it against the code."},{"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":"strong","name":"Engineering Process & SDLC Maturity","coverage":"high","findings":[],"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? Comment depth and time to approve need the pull request history."},{"id":"02.38","kind":"H","where":"The issue tracker: backlog, sprint history, estimate accuracy","question":"Is delivery planned and measured, or heroic?"},{"id":"02.37","kind":"H","where":"Tickets, chat and postmortems","question":"How are incidents run, reviewed and learned from?"}]},{"id":"03","band":"adequate","name":"Organization & Key-Person Risk","coverage":"partial","findings":[{"id":"03.5","band":"adequate","layer":"deterministic","title":"The contributor who wrote a quarter or more of this has not committed here for more than a year","signal":"contributor_attrition","weight":"corroborating","evidence":[{"ref":"last-commit-by-top-author","kind":"metric","detail":"last commit more than a year ago, measured to the survey"},{"ref":"git shortlog -sn","kind":"metric","detail":"top author a quarter or more of 16,405 commits"}],"observed":{"authors":461,"top_share":"a quarter or more","top_contributor_last_committed":"more than a year ago"},"dimension":"03","rationale":"One person authored a quarter or more of 16,405 commits and has not committed here for more than a year, 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":10,"what_a_person_adds":[{"id":"03.29","kind":"H+","where":"The deal terms","measured":"461 people have committed here.","question":"Which of them are you acquiring, and which are you replacing?"},{"id":"03.22","kind":"H+","where":"The team","measured":"images/ (less than a quarter of the files) has not changed in 18 months while the rest of the repository moved.","question":"Is that code finished, or abandoned, and who still knows how it works?"},{"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? Commit times cannot say: git keeps no reliable local time."},{"id":"03.32","kind":"H","where":"Interviews","question":"Does the team want to stay after close?"},{"id":"03.33","kind":"H","where":"Time with the team","question":"How are decisions made and disagreements resolved?"}]},{"id":"04","band":"adequate","name":"Product & Engineering Maturity","coverage":"minimal","findings":[{"id":"04.28","band":"adequate","layer":"deterministic","title":"27% of the code is legacy or compatibility code, the oldest 31 months old","signal":"compat_layers","weight":"corroborating","evidence":[{"ref":"core/android/common/src/main/kotlin/app/k9mail/core/android/common/compat/BundleCompat.kt","kind":"path","path":"core/android/common/src/main/kotlin/app/k9mail/core/android/common/compat/BundleCompat.kt","detail":"legacy or compatibility code"},{"ref":"core/ui/legacy/designsystem/build.gradle.kts","kind":"path","path":"core/ui/legacy/designsystem/build.gradle.kts","detail":"legacy or compatibility code"},{"ref":"core/ui/legacy/designsystem/src/main/kotlin/app/k9mail/core/ui/legacy/designsystem/atom/icon/Icons.kt","kind":"path","path":"core/ui/legacy/designsystem/src/main/kotlin/app/k9mail/core/ui/legacy/designsystem/atom/icon/Icons.kt","detail":"legacy or compatibility code"}],"observed":{"share":0.272,"code_files":2924,"compat_files":794,"oldest_months":31},"dimension":"04","rationale":"794 of 2924 source files sit in paths named legacy, compat, shim, polyfill or deprecated, and some have been there 31 months. That is usually a migration that never finished. Ask whether finishing it is planned, and what keeping both costs."},{"id":"04.62","band":"adequate","layer":"deterministic","title":"Releases are cut from another branch than the one surveyed","signal":"release_branch","weight":"corroborating","context":true,"evidence":[{"ref":"52d154e0d","kind":"commit","detail":"tag THUNDERBIRD_23_1"}],"observed":{"elsewhere":224,"on_branch":290,"tags_in_window":514,"direction_known":true,"later_on_branch":0},"dimension":"04","rationale":"The newest release, THUNDERBIRD_23_1, is not on the branch this survey read; the newest release on it is 5.916. The shipped product may differ from what this report describes. Survey the release branch too.","context_why":"A note that does not affect this rating: notes like it are common in well-run projects."}],"signals_run":19,"conclusive_signals":13,"what_a_person_adds":[{"id":"04.11","kind":"H+","where":"The team","measured":"3,379 commits landed in the last year, against 1,426 the year before (+137%).","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":"05.22","band":"adequate","layer":"deterministic","title":"2 deserialisers that can run code","signal":"unsafe_deserialization","weight":"corroborating","context":true,"evidence":[{"ref":"legacy/core/src/main/java/com/fsck/k9/controller/PendingCommandSerializer.java","kind":"path","path":"legacy/core/src/main/java/com/fsck/k9/controller/PendingCommandSerializer.java","detail":"code-executing deserialiser","line_end":67,"line_start":67},{"ref":"legacy/core/src/main/java/com/fsck/k9/mailstore/LocalStore.java","kind":"path","path":"legacy/core/src/main/java/com/fsck/k9/mailstore/LocalStore.java","detail":"code-executing deserialiser","line_end":301,"line_start":301}],"observed":{"sites":2},"dimension":"05","rationale":"2 places read data with a deserialiser that executes what it reads (PHP `unserialize`). That is safe on data the system wrote itself and remote code execution on anything else. Ask where each one's input comes from.","context_why":"A note that does not affect this rating: in Borehole's calibration, this check's notes were usually true but overstated."},{"id":"05.26","band":"adequate","layer":"deterministic","title":"1 locked dependency has published vulnerabilities","signal":"known_vulnerabilities","weight":"corroborating","context":true,"evidence":[{"ref":"gradle/libs.versions.toml","kind":"path","path":"gradle/libs.versions.toml","detail":"org.jsoup:jsoup 1.19.1: GHSA-pmhh-3w7g-xqp8 (moderate), fixed in 1.23.1"}],"observed":{"advisories":1,"dependencies":147,"high_or_critical":0,"pinned_to_a_commit":0,"ecosystems_not_read":[],"vulnerable_packages":1,"set_aside_not_imported":0,"high_or_critical_shipping":0},"dimension":"05","rationale":"1 of 147 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-common/src/main/AndroidManifest.xml","kind":"path","path":"app-common/src/main/AndroidManifest.xml","detail":"cleartext allowed app-wide","line_end":13,"line_start":13},{"ref":"app-common/src/main/res/xml/network_security_config.xml","kind":"path","path":"app-common/src/main/res/xml/network_security_config.xml","detail":"cleartext allowed app-wide","line_end":7,"line_start":7}],"observed":{"sites":2},"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":"05.43","kind":"H+","where":"The security owner","measured":"A threat model is in the tree (docs/security/threat-modeling-guide.md).","question":"Does it name the assets this code actually handles, and is it current against the deployment?"},{"id":"05.52","kind":"H+","where":"The mobile team and the store review history","measured":"The Android app requests 1 sensitive permission: READ_CONTACTS.","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. 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 legacy/, feature/, core/. 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 from a repository"}],"repository":{"loc":392465,"head":"a86607cb8dcc5ddaf53436a2f78b32d9f735e430","slug":"thunderbird/thunderbird-android","tags":616,"stars":14038,"shallow":false,"span_days":6541.7,"last_commit":"2026-09-25T18:18:50+00:00","surveyed_at":null,"commits_read":21112,"first_commit":"2008-10-28T00:58:59+00:00","truncated_at":null,"window_start":"2008-10-28T00:58:59+00:00","tracked_files":8381,"history_complete":true},"generated_at":"2026-10-05T12:12:24.547958+00:00","generated_by":"borehole 0.7.13","rejection_log":[{"reason":"change is spread across the codebase rather than pooling in a few files","signal":"hotspot_concentration","observed":{"files":28766,"top5_share":0.022},"dimension":"04","conclusive":true},{"reason":"debt markers are sparse","signal":"debt_markers","observed":{"markers":249,"per_kloc":0.64,"lines_read":387614},"dimension":"04","conclusive":true},{"reason":"no dependency manifest of the product's own was found","signal":"dependency_sprawl","observed":{"set_aside":{"scripts/requirements.txt":"not product code (tooling)"},"manifests_checked":["package.json","go.mod","requirements.txt","requirements.in","pyproject.toml"]},"dimension":"04","conclusive":false},{"reason":"test effort kept pace with code written","signal":"test_growth","observed":{"late_test_per_code":0.402,"early_test_per_code":0.074},"dimension":"04","conclusive":true},{"reason":"rework is not rising against new work","signal":"churn_trend","observed":{"late_delete_per_insert":0.62,"early_delete_per_insert":0.857,"single_commit_deletions_set_aside":[]},"dimension":"04","conclusive":true},{"reason":"no pinned runtime version to check","signal":"eol_runtime","observed":{"pinned":0},"dimension":"04","conclusive":false},{"reason":"fixes usually come with a test","signal":"fixes_with_tests","observed":{"fixes":467,"share":0.248,"with_tests":116},"dimension":"04","conclusive":true},{"reason":"fixing is not crowding out building","signal":"fix_share_trend","observed":{"fix_share_by_quarter_newest_first":[0.04,0.17,0.14,0.14,0.17,0.1,0.1,0.13]},"dimension":"04","conclusive":true},{"reason":"columns, once added, stay","signal":"schema_churn","observed":{"dropped_within_90_days":0,"columns_added_last_year":0},"dimension":"04","conclusive":false},{"reason":"no JavaScript manifest to read","signal":"dependency_redundancy","observed":{},"dimension":"04","conclusive":false},{"reason":"this repository does not deploy a running service, so instrumentation is not expected of it","signal":"telemetry_presence","observed":{"basis":"nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere","files_read":5055},"dimension":"06","conclusive":true},{"reason":"not a running service; structured logging is not expected of a library","signal":"structured_logging","observed":{"basis":"nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere"},"dimension":"06","conclusive":true},{"reason":"not a running service, so a health endpoint is not expected","signal":"healthcheck_presence","observed":{"basis":"nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere"},"dimension":"06","conclusive":true},{"reason":"not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere","signal":"telemetry_depth","observed":{"service":false},"dimension":"06","conclusive":false},{"reason":"not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere","signal":"print_logging","observed":{"service":false},"dimension":"06","conclusive":false},{"reason":"not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere","signal":"correlation_ids","observed":{"service":false},"dimension":"06","conclusive":false},{"reason":"not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere","signal":"error_reporting","observed":{"service":false},"dimension":"06","conclusive":false},{"reason":"the product's code names no reporting host","signal":"usage_reporting_default","observed":{"settings_on":2,"settings_off":2,"reporting_hosts":[]},"dimension":"06","conclusive":true},{"reason":"not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere","signal":"alert_rules","observed":{"service":false},"dimension":"06","conclusive":false},{"reason":"not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere","signal":"deployed_image_floats","observed":{"service":false},"dimension":"06","conclusive":false},{"reason":"no Kubernetes probes","signal":"probes_identical","observed":{},"dimension":"06","conclusive":false},{"reason":"no Kubernetes deployments","signal":"single_replica","observed":{},"dimension":"06","conclusive":false},{"reason":"not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere","signal":"environment_branching","observed":{"service":false},"dimension":"06","conclusive":false},{"reason":"not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere","signal":"release_markers","observed":{"service":false},"dimension":"06","conclusive":false},{"reason":"migrations do not run at container start","signal":"migrate_on_start","observed":{},"dimension":"06","conclusive":true},{"reason":"no feature-flag service; flags may live elsewhere","signal":"feature_flags","observed":{"sdk_files":0,"evaluation_sites":13},"dimension":"06","conclusive":false},{"reason":"no single contributor dominates the last 24 months","signal":"contributor_concentration","observed":{"years":17.9,"window":"last 24 months","authors":461,"top_share":"a quarter or more","bus_factor":3,"authors_in_window":127,"top_share_all_time":"a quarter or more","bus_factor_all_time":3},"dimension":"03","conclusive":true},{"reason":"more than one contributor active in the trailing year","signal":"active_contributors","observed":{"all_time":461,"active_12mo":85},"dimension":"03","conclusive":true},{"reason":"every substantial directory has been touched by more than one person","signal":"knowledge_silos","observed":{"authors":461,"directories":16},"dimension":"03","conclusive":true},{"reason":"an open contributor base, where one-commit contributors are normal","signal":"drive_by_contributors","observed":{"authors":461,"one_off_share":0.49},"dimension":"03","conclusive":true},{"reason":"more than one person changes the critical paths","signal":"critical_path_ownership","observed":{"authors":127,"sole_owned_areas":[]},"dimension":"03","conclusive":true},{"reason":"the second and third contributors are still active","signal":"second_contributor_attrition","observed":{"gone":[]},"dimension":"03","conclusive":true},{"reason":"the team has not narrowed to one person","signal":"bus_factor_trend","observed":{"by_year_newest_first":[2,3,1,1]},"dimension":"03","conclusive":true},{"reason":"the team is not shrinking","signal":"joiners_and_leavers","observed":{"left":13,"joined":32,"regular_last_year":40,"regular_prior_year":23},"dimension":"03","conclusive":true},{"reason":"a meaningful share of recent change carries evidence of review","signal":"merge_discipline","observed":{"merges":1478,"window":"last 24 months","with_tracked":42,"with_reviewed":0,"reviewed_share":0.543,"commits_in_window":6685,"squashed_with_pr_ref":31,"with_signed_off_other":328,"reviewed_share_all_time":0.337,"with_committed_by_other":3560},"dimension":"02","conclusive":true},{"reason":"CI configuration is present in the working tree","signal":"ci_presence","observed":{"count":25,"configs":[".github/workflows/build-android.yml",".github/workflows/build-cli-tools.yml",".github/workflows/build-daily.yml",".github/workflows/build-docs.yml",".github/workflows/build-scripts.yml"]},"dimension":"02","conclusive":true},{"reason":"tests are present in a normal proportion to source","signal":"test_presence","observed":{"tests":847,"source":3771,"test_ratio":0.225},"dimension":"02","conclusive":true},{"reason":"tags are present","signal":"release_cadence","observed":{"tags":616,"sample":["2.000","2.102","2.103","2.105","2.106"]},"dimension":"02","conclusive":true},{"reason":"commit subjects generally carry content","signal":"conventional_commits","observed":{"sampled":16805,"low_content_share":0.018},"dimension":"02","conclusive":true},{"reason":"process scaffolding is present in the repository","signal":"branch_protection_hints","observed":{"present":["CI workflows","CODEOWNERS","a pull-request template","contribution guidance"]},"dimension":"02","conclusive":true},{"reason":"CI invokes a test runner","signal":"ci_runs_tests","observed":{"sample":[".github/workflows/quality-checks.yml"],"configs":25,"with_tests":1},"dimension":"02","conclusive":true},{"reason":"few tests are switched off","signal":"skipped_tests","observed":{"focused":0,"skipped":12,"test_files":911,"files_with_skips":5},"dimension":"02","conclusive":true},{"reason":"no test run in CI is written so that it cannot fail","signal":"ci_test_gating","observed":{"configs":25},"dimension":"02","conclusive":true},{"reason":"change is rarely undone","signal":"revert_share","observed":{"share":0.002,"reverts":10,"recent_commits":4812},"dimension":"02","conclusive":true},{"reason":"no lockfile to date","signal":"dependency_update_cadence","observed":{"lockfiles":0},"dimension":"02","conclusive":false},{"reason":"tests are not retried until they pass","signal":"flaky_test_markers","observed":{"test_retries":0,"suite_retries":0},"dimension":"02","conclusive":true},{"reason":"a linter or formatter runs in the build","signal":"lint_in_build","observed":{"wired":5,"ci_configs":25,"product_files":2924},"dimension":"02","conclusive":true},{"reason":"the typical branch reaches the trunk quickly","signal":"long_lived_branches","observed":{"share":0.045,"merges":1444,"long_lived":65,"median_days":1},"dimension":"02","conclusive":true},{"reason":"changes arrive in reviewable sizes","signal":"commit_size","observed":{"share":0.005,"commits":4257,"over_2000_lines":21},"dimension":"02","conclusive":true},{"reason":"the largest burst was translation files (79% of it), which explains the rate: translations arrive from a vendor in bulk, dependencies and generated code are committed whole, a merged pull request is dated when it merged, not when it was written, a branch merged by a merge commit was reviewed as one piece, and an export or mirror tool dates history when it replays it","signal":"burst_import","observed":{"kinds":["translation files"],"largest_commits":"62b5080..942742c","bursts_explained":6,"largest_net_added":7316},"dimension":"01","conclusive":true},{"reason":"first commit is not a disproportionate share of the codebase","signal":"initial_dump","observed":{"insertions":0,"share_of_insertions":0.0},"dimension":"01","conclusive":true},{"reason":"commit subjects vary in wording and length","signal":"message_uniformity","observed":{"length_stdev":49.4,"repeat_share":0.168},"dimension":"01","conclusive":true},{"reason":"most files were revisited after they were first written","signal":"revision_depth","observed":{"files_seen":6368,"write_once_share":0.3},"dimension":"01","conclusive":true},{"reason":"little shipping code is repeated verbatim across files","signal":"duplicated_blocks","observed":{"share":0.0204,"product_files":2924,"distinct_blocks":139581,"duplicated_blocks":2844},"dimension":"01","conclusive":true},{"reason":"errors are rarely thrown away","signal":"swallowed_errors","observed":{"loc":392465,"files":3,"per_kloc":0.02,"swallowed":7},"dimension":"01","conclusive":true},{"reason":"no product Dockerfile to read","signal":"build_reproducibility","observed":{"from_lines":0},"dimension":"01","conclusive":false},{"reason":"no language migration is stalled halfway","signal":"unfinished_migration","observed":{},"dimension":"01","conclusive":true},{"reason":"not a data or machine-learning repository","signal":"notebook_outputs","observed":{},"dimension":"01","conclusive":false},{"reason":"no model weights are committed","signal":"weights_in_git","observed":{"files":0},"dimension":"01","conclusive":true},{"reason":"no credential-shaped strings outside test and fixture paths","signal":"committed_secrets","observed":{"note":"the working tree only; the history is 05.5","patterns":8,"files_read":5055,"inert_tokens_set_aside":0,"fixture_matches_ignored":0},"dimension":"05","conclusive":true},{"reason":"at least one standard guard rail is configured","signal":"security_guardrails","observed":{"present":[".github/CODEOWNERS",".github/dependabot.yml","SECURITY.md"]},"dimension":"05","conclusive":true},{"reason":"dependencies are substantially pinned","signal":"dependency_pinning","observed":{"unpinned":0},"dimension":"05","conclusive":true},{"reason":"a licence file is present","signal":"license_present","observed":{"found":true},"dimension":"05","conclusive":true},{"reason":"no credential-shaped string was ever added outside test and fixture paths","signal":"secrets_in_history","observed":{"patterns":8,"truncated":false,"added_lines":1374089,"commits_scanned":16451,"inert_tokens_set_aside":0},"dimension":"05","conclusive":true},{"reason":"no Dockerfile to read","signal":"container_runs_as_root","observed":{"dockerfiles":0},"dimension":"05","conclusive":false},{"reason":"no environment file is committed outside tests and examples","signal":"secrets_management_pattern","observed":{"env_files":0},"dimension":"05","conclusive":true},{"reason":"third-party build steps are pinned, or few","signal":"supply_chain_pinning","observed":{"action_refs":79,"pipe_to_shell":0,"unpinned_third_party":0},"dimension":"05","conclusive":true},{"reason":"not a running service","signal":"outbound_timeouts","observed":{},"dimension":"05","conclusive":false},{"reason":"too few migrations to judge","signal":"migration_reversibility","observed":{"migrations":0},"dimension":"05","conclusive":false},{"reason":"not a running service; a library that builds SQL is doing its job","signal":"sql_from_strings","observed":{},"dimension":"05","conclusive":false},{"reason":"product code does not build shell commands from strings","signal":"shell_from_strings","observed":{"sites":0},"dimension":"05","conclusive":true},{"reason":"no TLS verification is switched off in product code","signal":"tls_verification_off","observed":{"files":0,"sites":0,"pinned_instead":0,"behind_an_opt_in":0},"dimension":"05","conclusive":true},{"reason":"no Kubernetes workload manifests","signal":"resource_limits","observed":{"workloads":0},"dimension":"05","conclusive":false},{"reason":"no workload runs privileged or in the host's namespaces","signal":"privileged_workloads","observed":{"sites":0,"behind_a_setting_or_built_here":0},"dimension":"05","conclusive":true},{"reason":"deployment configuration references secrets, never holds them","signal":"credentials_in_deploy_config","observed":{"files":0,"sites":0},"dimension":"05","conclusive":true},{"reason":"not a frontend","signal":"public_env_secret","observed":{},"dimension":"05","conclusive":false},{"reason":"not a frontend","signal":"unsafe_html","observed":{},"dimension":"05","conclusive":false},{"reason":"not a frontend","signal":"source_maps_shipped","observed":{},"dimension":"05","conclusive":false},{"reason":"no signing keystore or profile is committed","signal":"signing_material","observed":{"files":0},"dimension":"05","conclusive":true},{"reason":"not a data or machine-learning repository","signal":"dataset_provenance","observed":{},"dimension":"05","conclusive":false},{"reason":"no third-party code is committed to this repository, so the licences it depends on are resolved at build time and are not readable here","signal":"license_copyleft_inherited","observed":{"vendored_paths":0},"dimension":"05","conclusive":false},{"reason":"no packaging manifest states a licence","signal":"license_manifest_conflict","observed":{"manifests_checked":["package.json","pyproject.toml","Cargo.toml","composer.json"]},"dimension":"05","conclusive":false},{"reason":"no vendored third-party code is committed","signal":"license_vendored_unlicensed","observed":{"components":0},"dimension":"05","conclusive":true},{"reason":"the licence is recognisable as Apache-2.0","signal":"license_grant_unclear","observed":{"class":"permissive","license":"Apache-2.0"},"dimension":"05","conclusive":true},{"reason":"no widely used compiled library is committed to the product","signal":"committed_native_libraries","observed":{"libraries":0,"recognised":[]},"dimension":"05","conclusive":true},{"reason":"few or no feature flags in the history","signal":"flags_accumulating","observed":{"live":0,"retired":0,"flags_seen":0,"stale_over_a_year":0},"dimension":"04","conclusive":false},{"reason":"not a running service","signal":"api_versions_coexisting","observed":{},"dimension":"04","conclusive":false},{"reason":"few deprecations have outlived two years","signal":"deprecations_lingering","observed":{"older_than_two_years":2,"files_with_deprecations":74},"dimension":"04","conclusive":true},{"reason":"few dependencies were added and dropped within 60 days","signal":"dependency_churn","observed":{"dependencies_seen":5,"added_in_two_years":5,"removed_within_60_days":0},"dimension":"04","conclusive":true},{"reason":"no platform was dropped from CI in the last two years","signal":"ci_platforms_dropped","observed":{"platforms_seen":["Linux"],"dropped_in_two_years":[]},"dimension":"04","conclusive":true},{"reason":"the README's first screen states no end, move or freeze","signal":"repository_status","observed":{"statements":0},"dimension":"04","conclusive":true},{"reason":"nothing says development happens elsewhere","signal":"development_elsewhere","observed":{"no_pr_statements":0,"mirror_statements":0,"replayed_commit_share":0.0},"dimension":"02","conclusive":true},{"reason":"the root licence has not changed in the history read","signal":"licence_changes","observed":{"licence_versions":1,"unreleased_changes":0},"dimension":"05","conclusive":true},{"reason":"no directory carries a separate paid-edition licence","signal":"paid_edition","observed":{"directories":0},"dimension":"05","conclusive":true},{"reason":"releases keep pace with development","signal":"releases_stopped","observed":{"median_gap_days":2.5,"days_since_last_tag":3,"commits_last_90_days":2286},"dimension":"04","conclusive":true},{"reason":"no file says one person maintains it","signal":"single_maintainer","observed":{"statements":0},"dimension":"03","conclusive":true},{"reason":"no published advisory affects the surveyed version","signal":"project_advisories","observed":{"sources":["OSV by commit","GitHub repository advisories","NVD"],"affecting":0,"exploited":0,"advisories":0,"version_from":"the newest release tag in the surveyed history, 10,197 commits before the surveyed commit","fix_unreleased":0,"sources_failed":[],"version_unknown":0,"high_or_critical":0,"surveyed_version":"5.916.0","affecting_newest_release":0},"dimension":"05","conclusive":true},{"reason":"no advisory against the project in the last 24 months","signal":"advisory_record","observed":{"newest":null,"critical":0,"affecting":0,"could_not_tell":0,"last_24_months":0,"sources_failed":[],"high_or_critical":0},"dimension":"05","conclusive":true},{"reason":"no affecting advisory is on CISA's Known Exploited list","signal":"project_exploited","observed":{"exploited":0},"dimension":"05","conclusive":true}],"schema_version":"1","repository_says":[{"line":null,"path":null,"text":"Releases are cut from another branch than the one surveyed","finding":"04.62"},{"line":34,"path":".github/pull_request_template.md","text":"states a policy on AI-generated contributions","phrase":null}],"surveyed_commit":{"says":"The newest release, THUNDERBIRD_23_1, is not on the branch this survey read; the newest release on it is 5.916","kinds":["not the release line"],"advice":"Read this report as describing that commit, not the release users run. Survey the release branch or tag as well.","newest_release":{"sha":"52d154e0dba18b1c1331b403356a8e2c5d65a7ed","tag":"THUNDERBIRD_23_1"}},"provenance_disclosure":{"agents":[],"recent":{"since":"2025-09-25","until":"2026-09-25","window":"the last 12 months","measures":"share of lines added in the last 12 months to 2026-09-25 by commits declaring an AI agent as co-author: the same floor as the all-time share, over a shorter window","confidence":"moderate","ai_line_share":0.0,"total_commits":3689,"ai_commit_share":0.0,"confidence_basis":["54% of non-merge commits carry any trailer at all","68% of commits show author/committer date divergence, which is the shape of replayed history that can drop trailers"],"declared_commits":0,"total_lines_added":230906,"declared_lines_added":0},"window":null,"excluded":"lockfiles, vendored and generated paths are excluded from both measurements so that code nobody wrote cannot move the share","measures":"share of lines added by commits declaring an AI agent as co-author, as a proportion of all lines ever added","confidence":"low","measurable":true,"ai_line_share":0.0,"total_commits":16807,"affects_rating":false,"excluded_lines":7775,"ai_commit_share":0.0,"confidence_basis":["13% of non-merge commits carry any trailer at all","low trailer coverage: the convention may not be in consistent use","30% of commits show author/committer date divergence, which is the shape of replayed history that can drop trailers"],"declared_commits":0,"total_lines_added":1508873,"surviving_ai_lines":null,"surviving_measures":"share of lines still present in the working tree that originate in an AI-declared commit; null unless the scan was run with --deep","commit_share_by_year":{"2008":0.0,"2009":0.0,"2010":0.0,"2011":0.0,"2012":0.0,"2013":0.0,"2014":0.0,"2015":0.0,"2016":0.0,"2017":0.0,"2018":0.0,"2019":0.0,"2020":0.0,"2021":0.0,"2022":0.0,"2023":0.0,"2024":0.0,"2025":0.0,"2026":0.0},"declared_agent_names":[],"declared_lines_added":0,"surviving_line_share":null,"floor_not_measurement":"This is a lower bound. It counts what the repository declares. Undeclared AI authorship is invisible here, and a single rebase removes the trailers this rests on. Absence of a declaration is absence of disclosure, not absence of AI authorship.","surviving_total_lines":null},"reliance":"An automated reading of a repository's code and its history up to one commit, with public advisory records. It may be wrong, it is not legal, financial, investment or security advice, and it does not replace diligence by a qualified person. It is provided for information: nobody may rely on it (Borehole's terms, section 3).","published_under_todays_rules":["Words about people are today's: bands rather than exact shares, dates or day counts, and what the history measured rather than why."]}