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median)","line_end":1198,"line_start":1}],"observed":{"largest":2067,"library":{"n":382,"share":31,"value":30.0,"cutoff":138.63,"material":false,"percentile":85},"threshold":1000,"files_over":3,"median_lines":69},"dimension":"01","rationale":"The median source file here is 69 lines. 3 files exceed 1,000 lines, the largest being 2,067. 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":"135 errors caught and discarded in product code","signal":"swallowed_errors","weight":"corroborating","context":true,"evidence":[{"ref":"ee/tabby-ui/app/(dashboard)/settings/(integrations)/providers/[kind]/detail/components/provider-detail.tsx","kind":"path","path":"ee/tabby-ui/app/(dashboard)/settings/(integrations)/providers/[kind]/detail/components/provider-detail.tsx","detail":"error caught and discarded","line_end":328,"line_start":328},{"ref":"ee/tabby-ui/app/files/components/code-editor-view.tsx","kind":"path","path":"ee/tabby-ui/app/files/components/code-editor-view.tsx","detail":"error caught and discarded","line_end":248,"line_start":248},{"ref":"ee/tabby-ui/app/files/lib/search-match-extension/index.ts","kind":"path","path":"ee/tabby-ui/app/files/lib/search-match-extension/index.ts","detail":"error caught and discarded","line_end":39,"line_start":39}],"observed":{"loc":165247,"files":45,"per_kloc":0.82,"swallowed":135},"dimension":"01","rationale":"135 places catch an error and do nothing with it, across 45 files (0.8 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."},{"id":"01.33","band":"adequate","layer":"deterministic","title":"A move from JavaScript to TypeScript began 39 months ago and is 77% done","signal":"unfinished_migration","weight":"corroborating","context":true,"evidence":[{"ref":"file counts","kind":"metric","detail":"159 old, 522 new"}],"observed":{"migration":"JavaScript to TypeScript","new_files":522,"old_files":159,"new_share_now":0.985,"months_since_start":39,"new_share_at_start":0.684,"new_share_a_year_ago":0.985},"dimension":"01","rationale":"522 product files are in the new language and 159 are still in the old one, 39 months after the first new file appeared. The new language's share of the lines rose from 68% to 98%, and moved 0 percentage points in the last year. Two languages for one job doubles what an engineer has to know, and the unmoved half is usually what nobody wants to touch. Ask whether finishing it is planned, and what it costs.","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 1,880 product files.","question":"Where does the design live, and who holds it?"},{"id":"01.35","kind":"H+","where":"The team and the submodule owners","measured":"The repository pulls code in through git submodules (.gitmodules).","question":"A buyer receives pointers, not that code. Can every submodule be fetched without the team's credentials, and who owns each one?"},{"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":"116 test files / 1,385 source files"}],"observed":{"tests":116,"source":1385,"test_ratio":0.084},"dimension":"02","rationale":"116 test files against 1,385 source files (8.4%). 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."}],"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":"03.27","band":"adequate","layer":"deterministic","title":"Regular contributors fell from 11 to 3 in a year","signal":"joiners_and_leavers","weight":"corroborating","evidence":[{"ref":"regular contributors by year","kind":"metric","detail":"11 then 3; 8 stopped committing, 0 began"}],"observed":{"left":8,"joined":0,"regular_last_year":3,"regular_prior_year":11},"dimension":"03","rationale":"8 people who committed regularly the year before made no commits in the last year, and 0 new regular contributors arrived. Ask whether the work they did is still covered."}],"signals_run":10,"conclusive_signals":9,"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? 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":"04.3","band":"adequate","layer":"deterministic","title":"118 direct dependencies in a single manifest","signal":"dependency_sprawl","weight":"corroborating","evidence":[{"ref":"direct-dependencies","kind":"path","path":"ee/tabby-ui/package.json","detail":"118 declared"},{"ref":"direct-dependencies","kind":"path","path":"website/package.json","detail":"17 declared"},{"ref":"direct-dependencies","kind":"path","path":"clients/tabby-chat-panel/package.json","detail":"3 declared"},{"ref":"direct-dependencies","kind":"path","path":"experimental/prompt-rewrite-eval/requirements.txt","detail":"3 declared"}],"observed":{"set_aside":{},"by_manifest":{"website/package.json":17,"ee/tabby-ui/package.json":118,"clients/tabby-threads/package.json":2,"clients/tabby-chat-panel/package.json":3,"experimental/prompt-rewrite-eval/requirements.txt":3}},"dimension":"04","rationale":"ee/tabby-ui/package.json declares 118 direct dependencies. 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":"2% of bug fixes add or change a test","signal":"fixes_with_tests","weight":"corroborating","evidence":[{"ref":"fix commits touching tests","kind":"metric","detail":"8 of 407"}],"observed":{"fixes":407,"share":0.02,"with_tests":8},"dimension":"04","rationale":"Of 407 fixes in the last 24 months, 8 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."},{"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":"fc249713a","kind":"commit","detail":"tag v4.3.1"}],"observed":{"elsewhere":265,"on_branch":34,"tags_in_window":299,"direction_known":true,"later_on_branch":0},"dimension":"04","rationale":"The newest release, v4.3.1, is not on the branch this survey read; the newest release on it is v0.8.0. 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":14,"what_a_person_adds":[{"id":"04.11","kind":"H+","where":"The team","measured":"44 commits landed in the last year, against 1,230 the year before (-96%).","question":"Is that maintenance mode, a pivot, or fewer people working on it? The count looks the same for all three."},{"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":"05.1","band":"adequate","layer":"deterministic","title":"2 credential-shaped strings in the tree sit in tests, examples, documentation or local development settings","signal":"committed_secrets","weight":"corroborating","evidence":[{"kind":"metric","ref":"JWT","detail":"2 cited: JWT, where fakes are usual"}],"observed":{"sample_matches":2,"inert_tokens_set_aside":1},"dimension":"05","rationale":"Strings shaped like credentials appear only where fakes are usual: test fixtures, examples, documentation, placeholders and local stacks. They are almost always fakes. Ask someone to confirm that none of them works anywhere, because a real key in a development file is still a real key. 1 other match set aside: expired tokens, licence tokens a vendor verifies with a public key, or placeholder text where a key would go. None grants access to anything.","locations_withheld":2},{"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 2,099 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":"05.25","band":"adequate","layer":"deterministic","title":"1 environment file is committed","signal":"secrets_management_pattern","weight":"corroborating","context":true,"evidence":[{"ref":".env","kind":"path","path":".env","detail":"committed environment file"}],"observed":{"env_files":1},"dimension":"05","rationale":".env is tracked in git. Environment files are where credentials usually live, and committing one usually means nobody decided how secrets reach the running application. Whatever is in it is in the history for good. Check 05.1 says whether it holds anything credential-shaped.","context_why":"A note that does not affect this rating: in Borehole's calibration, this check's notes were usually true but overstated."},{"id":"05.27","band":"adequate","layer":"deterministic","title":"The build runs third-party code it does not pin","signal":"supply_chain_pinning","weight":"corroborating","context":true,"evidence":[{"ref":".github/workflows/ast-grep-lint.yml","kind":"path","path":".github/workflows/ast-grep-lint.yml","detail":"action pinned by tag","line_end":13,"line_start":13},{"ref":".github/workflows/autofix-pnpm.yml","kind":"path","path":".github/workflows/autofix-pnpm.yml","detail":"action pinned by tag","line_end":32,"line_start":32}],"observed":{"action_refs":97,"pipe_to_shell":0,"unpinned_third_party":22},"dimension":"05","rationale":"22 third-party CI actions are referenced by a tag or branch rather than a commit, so they run whatever that tag points to on the day. Tags have been moved to malicious commits in real supply-chain attacks, and a piped script is whatever the server returns that minute. Pinning to a commit is the fix, and it is small.","context_why":"A note that does not affect this rating: notes like it are common in well-run projects."},{"id":"05.13","band":"adequate","layer":"deterministic","title":"2 outbound calls can wait forever","signal":"outbound_timeouts","weight":"corroborating","context":true,"evidence":[{"ref":"experimental/prompt-rewrite-eval/evaluator.py","kind":"path","path":"experimental/prompt-rewrite-eval/evaluator.py","detail":"outbound call without a timeout","line_end":25,"line_start":25},{"ref":"experimental/prompt-rewrite-eval/evaluator.py","kind":"path","path":"experimental/prompt-rewrite-eval/evaluator.py","detail":"outbound call without a timeout","line_end":175,"line_start":175}],"observed":{"calls_without_timeout":2},"dimension":"05","rationale":"2 HTTP calls use a client with no timeout (Python `requests` without `timeout=`, or Go's default client). When a dependency slows down, each one holds a worker until the connection gives up, and enough of them take the service down with the dependency.","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":"120 locked dependencies have published vulnerabilities, 13 high or critical in what ships","signal":"known_vulnerabilities","weight":"corroborating","evidence":[{"ref":"pnpm-lock.yaml","kind":"path","path":"pnpm-lock.yaml","detail":"next 13.5.3: GHSA-2464-fhr4-w9xw (critical), fixed in 15.5.28"},{"ref":"Cargo.lock","kind":"path","path":"Cargo.lock","detail":"lettre 0.11.7: GHSA-4pj9-g833-qx53 (critical), fixed in 0.11.22"},{"ref":"pnpm-lock.yaml","kind":"path","path":"pnpm-lock.yaml","detail":"koa 2.15.3: GHSA-593f-38f6-jp5m (critical), fixed in 2.15.4; a development dependency"}],"observed":{"advisories":217,"dependencies":3967,"high_or_critical":108,"pinned_to_a_commit":0,"ecosystems_not_read":["Gradle"],"vulnerable_packages":120,"set_aside_not_imported":0,"high_or_critical_shipping":13,"high_or_critical_not_shipped":{"dev":64}},"unproven":true,"dimension":"05","rationale":"120 of 3,967 locked dependencies match 217 published advisories in OSV, 108 of them rated high or critical. 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."},{"id":"05.48","band":"adequate","layer":"deterministic","title":"15 places insert HTML from a variable without sanitising it","signal":"unsafe_html","weight":"corroborating","context":true,"evidence":[{"ref":"clients/eclipse/plugin/chat-panel/index.html","kind":"path","path":"clients/eclipse/plugin/chat-panel/index.html","detail":"HTML from a variable","line_end":80,"line_start":80},{"ref":"ee/tabby-webserver/ui/_next/static/chunks/21c8b353-925bb40fc9c4670c.js","kind":"path","path":"ee/tabby-webserver/ui/_next/static/chunks/21c8b353-925bb40fc9c4670c.js","detail":"HTML from a variable","line_end":9,"line_start":9},{"ref":"ee/tabby-webserver/ui/_next/static/chunks/2928-98ebfedf06caf8e1.js","kind":"path","path":"ee/tabby-webserver/ui/_next/static/chunks/2928-98ebfedf06caf8e1.js","detail":"HTML from a variable","line_end":1,"line_start":1}],"observed":{"sites":15},"dimension":"05","rationale":"15 places set HTML from a value that is neither a literal nor passed through a sanitiser. Where the value can come from a user, that is stored cross-site scripting, and it is the first thing a buyer's security review looks for in a frontend.","context_why":"A note that does not affect this rating: in Borehole's calibration, this check's notes were usually true but overstated."},{"id":"05.61","band":"adequate","layer":"deterministic","title":"Part of the code is under a separate licence: ee/","signal":"paid_edition","weight":"corroborating","evidence":[{"ref":"ee/LICENSE","kind":"path","path":"ee/LICENSE","detail":"licence: unrecognised"}],"observed":{"directories":1},"dimension":"05","rationale":"A directory named for a paid edition carries its own licence. That code is usually not open source even where the rest is; what the buyer may do with each part differs."}],"signals_run":34,"conclusive_signals":20,"what_a_person_adds":[{"id":"05.38","kind":"H+","where":"The provider's console and audit log","measured":"05.1 and 05.5 found credential-shaped strings in this repository.","question":"Was each one revoked at the provider? Deleting it from the code revokes nothing; only the provider's audit log shows that it was."},{"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":"05.41","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":[{"id":"06.9","band":"adequate","layer":"deterministic","title":"No error reporter is wired in","signal":"error_reporting","weight":"corroborating","context":true,"evidence":[{"ref":"error reporting","kind":"metric","detail":"no error reporter initialised"}],"observed":{"installed":[],"initialised":0,"config_files":0},"dimension":"06","rationale":"Nothing in the service initialises an error reporter (Sentry, Rollbar, Bugsnag, Honeybadger or an APM agent). An exception in production reaches a person only if someone is reading the logs, which usually means a customer reports it first.","context_why":"A note that does not affect this rating: notes like it are common in well-run projects."}],"signals_run":16,"conclusive_signals":6,"what_a_person_adds":[{"id":"06.19","kind":"H+","where":"The operations team","measured":"Nothing in the tree backs up or restores data.","question":"How is data backed up, and has a restore ever been rehearsed?"},{"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?"}],"not_assessable_reason":"only 6 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 TypeScript codebase, with Rust alongside (22% of source files). Does your engineering organisation already run TypeScript in production, or would this be the first?"},{"id":"07.10","kind":"H+","question":"The bulk of this system sits in clients/, ee/, crates/. Which of your existing systems would each of those have to absorb or replace?"},{"id":"07.2","kind":"H+","question":"The repository carries deployment configuration (docker/Dockerfile.cuda and 3 more). Does that match your deployment and on-call model, or does it need rehosting first?"},{"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 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