Borehole · Risk register · free tier
openzipkin/zipkin
Free reading: not for reliance
Borehole badge for openzipkin/zipkin
878ce2a · 3,003 commits · 818 files
Issued 2026-10-23

Nothing significant. Questions worth asking about Security & Reliability Posture, Product & Engineering Maturity.

106 checks ran across 6 assessable dimensions. 2 findings are worth checking first. 10 findings, each with evidence. One dimension cannot be assessed without an acquirer.

Worth checking first

Borehole's proprietary scoring is calibrated across hundreds of repositories. Each finding here reads significant, but its check has not yet held up often enough in that calibration to rate significant on its own. If one holds when someone checks it, it is significant.

  • 05.26 19 locked dependencies have published vulnerabilities, 19 high or critical in what ships
  • 03.5 The contributor who wrote more than half of this has not committed here for more than six months
strong adequate significant findings not assessable from a repository
Provenance disclosure does not affect any rating
0% of the code standing today was written in AI-declared commits
0% of lines still in the tree 0 of 113,941 0% of lines ever added these differ when early hand-written code has since been replaced
0% of lines added in the last 12 months (since 2025-10-23) arrived in AI-declared commits: 0/22 commits, confidence moderate. Also a floor.
0/2,780 commits declaring an agent
confidence: moderate
  • 8% of non-merge commits carry any trailer at all
  • low trailer coverage: the convention may not be in consistent use
  • no widespread author/committer date divergence
  • deep scan blamed 806 of 806 counted files
165,750 lines excluded as lockfiles, vendored or generated.
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.

Architecture & Codebase — including AI provenance

01 · strong · ratings ↑
A note that does not affect this rating
01.33

A move from JavaScript to TypeScript began 73 months ago and is 78% done

adequate

81 product files are in the new language and 23 are still in the old one, 73 months after the first new file appeared. The new language's share of the lines rose from 1% to 78%, 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.

A note that does not affect this rating: in Borehole's calibration, this check's notes were usually true but overstated.

Evidence
file counts 23 old, 81 new
Respond to this finding

Your response is published beside the finding, not instead of it. A finding you can argue with is the point — and a wrong one is calibration data we want.

An owner's response is removed only when it is unlawful, impersonates someone, publishes personal data or a credential, or is not about the finding. Disagreeing with the report is never a reason. To report a response, or to reach us about one, write to takedown@borehole.dev.

Engineering Process & SDLC Maturity

02 · strong · ratings ↑

No finding. 16 checks ran and none fired; the rejection log below says why each did not.

Organization & Key-Person Risk

03 · adequate · ratings ↑
03.5

The contributor who wrote more than half of this has not committed here for more than six months

adequate worth checking first

One person authored more than half of 2,780 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.

The check that found this reads significant, but it has not yet held up often enough in Borehole's calibration to rate a finding significant on its own. If it holds when someone checks it, this finding is significant.

Evidence
last-commit-by-top-author last commit more than six months ago, measured to the survey
git shortlog -sn top author more than half of 2,780 commits
Respond to this finding

Your response is published beside the finding, not instead of it. A finding you can argue with is the point — and a wrong one is calibration data we want.

An owner's response is removed only when it is unlawful, impersonates someone, publishes personal data or a credential, or is not about the finding. Disagreeing with the report is never a reason. To report a response, or to reach us about one, write to takedown@borehole.dev.

Product & Engineering Maturity

04 · adequate · ratings ↑
04.37

API v1 and v2 have been served together for 105 months

adequate

v2 first appeared in Aug 2017, and v1 is still in the code 105 months later. Two versions mean two surfaces to secure, document and support. Ask who still calls the old one, and whether retiring it is planned.

Evidence
zipkin-java-server/src/main/java/io/zipkin/ZipkinQueryApiV1.java zipkin-java-server/src/main/java/io/zipkin/ZipkinQueryApiV1.java — v1 since Oct 2015
zipkin-server/src/main/java/zipkin/server/ZipkinHttpCollector.java zipkin-server/src/main/java/zipkin/server/ZipkinHttpCollector.java — v2 since Aug 2017
Respond to this finding

Your response is published beside the finding, not instead of it. A finding you can argue with is the point — and a wrong one is calibration data we want.

An owner's response is removed only when it is unlawful, impersonates someone, publishes personal data or a credential, or is not about the finding. Disagreeing with the report is never a reason. To report a response, or to reach us about one, write to takedown@borehole.dev.

A note that does not affect this rating
04.5

Effort is shifting from building to rewriting

adequate

Deleted lines per line added rose from 0.59 to 1.20 between the first and second halves of this history. 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.

A note that does not affect this rating: in Borehole's calibration, this check's notes were usually true but overstated.

Evidence
deletions-per-insertion first half 0.59, second half 1.20 (split 2019-05-08)
Respond to this finding

Your response is published beside the finding, not instead of it. A finding you can argue with is the point — and a wrong one is calibration data we want.

An owner's response is removed only when it is unlawful, impersonates someone, publishes personal data or a credential, or is not about the finding. Disagreeing with the report is never a reason. To report a response, or to reach us about one, write to takedown@borehole.dev.

Security & Reliability Posture

05 · adequate · ratings ↑
05.26

19 locked dependencies have published vulnerabilities, 19 high or critical in what ships

adequate worth checking first

19 of 689 locked dependencies match 54 published advisories in OSV, 23 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.

The check that found this reads significant, but it has not yet held up often enough in Borehole's calibration to rate a finding significant on its own. Opening zipkin-lens/package-lock.json settles it. If it holds when someone checks it, this finding is significant.

Evidence
zipkin-lens/package-lock.json zipkin-lens/package-lock.json — tinypool 0.8.4: GHSA-5gmw-xhrv-c9v3 (critical), fixed in 2.1.1
zipkin-lens/package-lock.json zipkin-lens/package-lock.json — vitest 1.6.1: GHSA-5xrq-8626-4rwp (critical), fixed in 4.1.0
zipkin-lens/package-lock.json zipkin-lens/package-lock.json — brace-expansion 5.0.2: GHSA-3jxr-9vmj-r5cp (high), fixed in 5.0.7
Respond to this finding

Your response is published beside the finding, not instead of it. A finding you can argue with is the point — and a wrong one is calibration data we want.

An owner's response is removed only when it is unlawful, impersonates someone, publishes personal data or a credential, or is not about the finding. Disagreeing with the report is never a reason. To report a response, or to reach us about one, write to takedown@borehole.dev.

05.49

The production build publishes source maps

adequate

The build configuration emits source maps for production, so the original source, with its comments and structure, is downloadable by every visitor. Upload them to an error tracker and keep them off the public server instead.

Evidence
zipkin-lens/vite.config.ts zipkin-lens/vite.config.ts:43 — source maps in a production build
Respond to this finding

Your response is published beside the finding, not instead of it. A finding you can argue with is the point — and a wrong one is calibration data we want.

An owner's response is removed only when it is unlawful, impersonates someone, publishes personal data or a credential, or is not about the finding. Disagreeing with the report is never a reason. To report a response, or to reach us about one, write to takedown@borehole.dev.

Notes that do not affect this rating
05.20

7 SQL statements built from strings

adequate

7 places in product code build SQL by formatting or joining strings rather than passing parameters. In each, what the code shows going in is a table or column name, a constant, or something the line does not show, not a request's value. Ask whether any value reaches these strings, rather than a parameter.

A note that does not affect this rating: in Borehole's calibration, this check's notes were usually true but overstated.

Evidence
zipkin-storage/cassandra/src/main/java/zipkin2/storage/cassandra/CassandraSpanConsumer.java zipkin-storage/cassandra/src/main/java/zipkin2/storage/cassandra/CassandraSpanConsumer.java:76 — SQL built from a string
zipkin-storage/cassandra/src/main/java/zipkin2/storage/cassandra/CassandraSpanConsumer.java zipkin-storage/cassandra/src/main/java/zipkin2/storage/cassandra/CassandraSpanConsumer.java:84 — SQL built from a string
zipkin-storage/cassandra/src/main/java/zipkin2/storage/cassandra/CassandraSpanConsumer.java zipkin-storage/cassandra/src/main/java/zipkin2/storage/cassandra/CassandraSpanConsumer.java:89 — SQL built from a string
Respond to this finding

Your response is published beside the finding, not instead of it. A finding you can argue with is the point — and a wrong one is calibration data we want.

An owner's response is removed only when it is unlawful, impersonates someone, publishes personal data or a credential, or is not about the finding. Disagreeing with the report is never a reason. To report a response, or to reach us about one, write to takedown@borehole.dev.

05.65

2 advisories against this project in the last 24 months

adequate

The newest was published on 2026-08-28. 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 1 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 3.6.1. Answer lives in: the release you run, set against each fixed version. The record is incomplete: NVD: 2 records name zipkin with nothing tying them to this repository (CVE-2026-41310, CVE-2026-81870).

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.

Evidence
CVE-2026-82265 2026-08-28: CVE-2026-82265 (moderate): Zipkin through 3.6.1 exposes Spring Boot Actuator endpoints on the tracing API port without authentication, allowing unauthenticated attackers to access sensiti
CVE-2025-53602 2025-07-04: CVE-2025-53602 (moderate): Zipkin through 3.5.1 has a /heapdump endpoint (associated with the use of Spring Boot Actuator), a similar issue to CVE-2025-48927.
Respond to this finding

Your response is published beside the finding, not instead of it. A finding you can argue with is the point — and a wrong one is calibration data we want.

An owner's response is removed only when it is unlawful, impersonates someone, publishes personal data or a credential, or is not about the finding. Disagreeing with the report is never a reason. To report a response, or to reach us about one, write to takedown@borehole.dev.

Observability & Operations

06 · adequate · ratings ↑
06.2

No structured logging library is in use

adequate

Nothing references a structured logging library. Logs that are written to be read by a person are not searchable by a machine, which means incident response here is proportional to how well someone remembers the codebase rather than to what the tooling can find.

Evidence
logging-scan searched 758 files for 10 structured logging libraries; 0 matched
Respond to this finding

Your response is published beside the finding, not instead of it. A finding you can argue with is the point — and a wrong one is calibration data we want.

An owner's response is removed only when it is unlawful, impersonates someone, publishes personal data or a credential, or is not about the finding. Disagreeing with the report is never a reason. To report a response, or to reach us about one, write to takedown@borehole.dev.

A note that does not affect this rating
06.9

No error reporter is wired in

adequate

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.

A note that does not affect this rating: notes like it are common in well-run projects.

Evidence
error reporting no error reporter initialised
Respond to this finding

Your response is published beside the finding, not instead of it. A finding you can argue with is the point — and a wrong one is calibration data we want.

An owner's response is removed only when it is unlawful, impersonates someone, publishes personal data or a credential, or is not about the finding. Disagreeing with the report is never a reason. To report a response, or to reach us about one, write to takedown@borehole.dev.

Fit with the Acquirer

07 · not assessable · ratings ↑

Not rated: structurally not assessable from a repository. What a person adds here.

Check it on the running system

5 checks against the running system follow from the findings above: what a buyer's engineer will try, how to run it first, and what to have ready. A paid survey of this repository includes them. See the tiers.

A paid survey of a public repository is also reviewed: a language model reads each finding against the code and withdraws only findings it judges the code contradicts, each listed with its reason. The review is a language model's reading of the findings against the code, and it can be wrong. It never adds a finding, never raises a band, and never removes a finding from a proven check or an advisory that affects the surveyed version.

What a person adds

The survey reads what the repository can show. The code cannot settle these questions, and on them this report states nothing. Each says where its answer lives: your own engineer, the company, or an assessor you choose can settle it. Questions marked measured open with something this repository shows.

Architecture & Codebase — including AI provenance

01 · full coverage
  1. measured No architecture or design document is in the tree, across 462 product files. Where does the design live, and who holds it? Answer lives in: The team01.38
  2. Is the architecture right for the next three years of the product? Answer lives in: Your architects, with the product roadmap01.39
  3. Were the home-grown components reasonable choices when they were made, and are they now? Answer lives in: The team's reasoning at the time01.40

Engineering Process & SDLC Maturity

02 · high coverage
  1. Is review real or a rubber stamp? Comment depth and time to approve need the pull request history. Answer lives in: The code host's pull request data02.32
  2. Is delivery planned and measured, or heroic? Answer lives in: The issue tracker: backlog, sprint history, estimate accuracy02.38
  3. How are incidents run, reviewed and learned from? Answer lives in: Tickets, chat and postmortems02.37

Organization & Key-Person Risk

03 · partial coverage
  1. measured One contributor authored more than half of the commits in this history. Is that person part of the transaction, and for how long after it? Answer lives in: The deal terms03.29
  2. Who mentors whom, and would that survive a departure? Answer lives in: The team; review history only suggests candidates03.28
  3. Can the team grow, and who stands behind the top three contributors? Answer lives in: Recruiting data and the org chart03.30
  4. Is the seniority mix sound, and will pay survive your salary bands? Answer lives in: HR data03.31
  5. Is the pace sustainable? Commit times cannot say: git keeps no reliable local time. Answer lives in: Interviews and on-call history03.14
  6. Does the team want to stay after close? Answer lives in: Interviews03.32
  7. How are decisions made and disagreements resolved? Answer lives in: Time with the team03.33

Product & Engineering Maturity

04 · minimal coverage
  1. measured 31 commits landed in the last year, against 55 the year before (-44%). Is that maintenance mode, a pivot, or fewer people working on it? The count looks the same for all three. Answer lives in: The team04.11
  2. Can this team deliver the stated roadmap on the stated timeline? Answer lives in: The data room and the team's record of estimates04.32
  3. Does leadership know about the debt, and is time budgeted to repay it? Answer lives in: Budget and roadmap decisions04.31
  4. Is the engineering shape consistent with the commercial story? Answer lives in: Revenue, customer and churn data04.33

Security & Reliability Posture

05 · partial coverage
  1. measured No threat model is in the tree of what looks like a running service. Does one exist elsewhere, and who owns it? Answer lives in: The security owner05.43
  2. What has actually broken, how often, and how badly? Answer lives in: Ticketing and chat05.41
  3. What did external testing find, and was it fixed? Answer lives in: Reports in the data room05.42
  4. What is the SOC 2, ISO 27001 or GDPR status, and where is the evidence? Answer lives in: Audit reports; policy files in the tree are not evidence05.44

Observability & Operations

06 · partial coverage
  1. measured Nothing in the tree backs up or restores data. How is data backed up, and has a restore ever been rehearsed? Answer lives in: The operations team06.19
  2. measured No alert rule is defined in the repository. Where are alerts defined, who receives them, and when did one last fire? Answer lives in: The alerting tool and the on-call rota06.10
  3. Are the dashboards opened, the alerts acknowledged and the pages answered? Answer lives in: Pager history and dashboard logs06.29
  4. Are the service-level objectives actually met? Answer lives in: Production metrics06.30
  5. Who carries the pager, and how often does it go off? Answer lives in: Pager exports and interviews06.31
  6. What does it cost to run, and how much headroom is there? Answer lives in: Cloud billing and capacity plans06.32

Fit with the Acquirer

07 · none coverage

Not rated: structurally not assessable from a repository.

  1. This is primarily a Java codebase, with TypeScript alongside (26% of source files). Does your engineering organisation already run Java in production, or would this be the first? 07.1
  2. The bulk of this system sits in zipkin-lens/, zipkin-storage/, zipkin/. Which of your existing systems would each of those have to absorb or replace? 07.10
  3. The repository carries deployment configuration (build-bin/docker-compose-zipkin-eureka.yml and 4 more). Does that match your deployment and on-call model, or does it need rehosting first? 07.2
  4. 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?
  5. Which of these systems duplicate yours, and which get retired? Answer lives in: Your architecture07.11
  6. What will integration cost, and in what order? Answer lives in: The engagement07.12
  7. Where does the team land in your organisation, and who reports to whom? Answer lives in: Your org design07.13
  8. Are there earn-outs, retention packages or contractor IP to assign? Answer lives in: Deal terms07.14
  9. Do customer contracts limit hosting, regions or vendors? Answer lives in: Customer contracts07.15

A human assessment is Borehole's own paid service, €12,000+ (total price is determined per engagement; travel billed at cost). It is not independent of this report: the same business produced both. It is a separate contract, with its own scope, terms and reliance.

Embed the badge

Tied to this commit and this date, and it fades after 90 days — an honest badge is one that expires. A repository with significant findings gets a neutral "read" badge rather than a red one: the library is where the range is visible, not someone else's README.

Borehole badge for openzipkin/zipkin
[![Borehole](/badge/openzipkin/zipkin.svg "Borehole free reading: not for reliance. See the full report.")](/r/openzipkin/zipkin/878ce2a)

If you embed it: link it to the report, remove it if the report is delisted, and do not present it as a certification or an endorsement.

Was this reading useful?
Rejection log — 96 signals that ran and did not fire

Appendix: rejection log — 96 signals that ran and did not fire

Published on purpose. A signal that looked and decided not to fire has told you something, and this is the calibration data behind every threshold above.

Looked, and found nothing — 68

SignalWhat it found
04.hotspot_concentration change is spread across the codebase rather than pooling in a few filesfiles 4,671 · top5 share 0.114
04.debt_markers debt markers are sparsemarkers 53 · per kloc 0.57 · lines read 92,866
04.dependency_sprawl direct dependency counts are unremarkable
04.test_growth test effort kept pace with code writtenlate test per code 0.772 · early test per code 0.672
04.compat_layers little code is kept for the old wayshare 0.0 · code files 355 · compat files 0
04.dependency_redundancy one library per job, mostly
06.telemetry_presence a telemetry or error-reporting library is referencednote presence only; whether anyone watches it is not visible here · matches 144
06.healthcheck_presence a health or readiness check is defined
06.telemetry_depth the service is visible in more than one way
06.correlation_ids a request can be followed through the logstracing True · request id sites 83
06.usage_reporting_default the product's code names no reporting hostsettings on 0 · settings off 0
06.deployed_image_floats every deployed image names a versionimages 5 · floating 0
06.environment_branching environment differences live in configurationsites 0
06.migrate_on_start migrations do not run at container start
03.contributor_concentration no single contributor dominates the last 24 monthsyears 13.8 · window last 24 months · authors 137
03.active_contributors more than one contributor active in the trailing yearall time 137 · active 12mo 5
03.knowledge_silos every substantial directory has been touched by more than one personauthors 137 · directories 9
03.drive_by_contributors an open contributor base, where one-commit contributors are normalauthors 137 · one off share 0.613
03.critical_path_ownership more than one person changes the critical pathsauthors 8
03.bus_factor_trend the team has not narrowed to one person
02.merge_discipline a meaningful share of recent change carries evidence of reviewmerges 0 · window last 24 months · with tracked 2
02.ci_presence CI configuration is present in the working treecount 7
02.test_presence tests are present in a normal proportion to sourcetests 237 · source 581 · test ratio 0.408
02.release_cadence tags are presenttags 232
02.conventional_commits commit subjects generally carry contentsampled 2,780 · low content share 0.014
02.branch_protection_hints process scaffolding is present in the repository
02.ci_runs_tests CI invokes a test runnerconfigs 7 · with tests 1
02.skipped_tests few tests are switched offfocused 0 · skipped 11 · test files 325
02.ci_test_gating no test run in CI is written so that it cannot failconfigs 7
02.dependency_update_cadence dependencies move with the codelockfiles 1 · commits since 3 · days since lockfile changed 0
02.flaky_test_markers tests are not retried until they passtest retries 0 · suite retries 0
02.lint_in_build a linter or formatter runs in the buildwired 8 · ci configs 7 · product files 355
01.burst_import no commit run met both the rate and the net-addition thresholdgap seconds 180 · min add ratio 3.0 · min net added 2,000
01.initial_dump first commit is not a disproportionate share of the codebaseinsertions 0 · share of insertions 0.0
01.message_uniformity commit subjects vary in wording and lengthlength stdev 19.3 · repeat share 0.131
01.revision_depth most files were revisited after they were first writtenfiles seen 447 · write once share 0.096
01.oversized_modules no module is an outlier against this codebase's own normlargest 1,331 · threshold 1,000 · median lines 84
01.duplicated_blocks little shipping code is repeated verbatim across filesshare 0.0038 · product files 344 · distinct blocks 24,767
01.swallowed_errors errors are rarely thrown awayloc 93,614 · files 0 · per kloc 0.0
01.build_reproducibility every base image names a versionfloating 0 · from lines 5
01.weights_in_git no model weights are committedfiles 0
05.committed_secrets no credential-shaped strings outside test and fixture pathsnote the working tree only; the history is 05.5 · patterns 8 · files read 758
05.security_guardrails at least one standard guard rail is configured
05.dependency_pinning a lockfile is committed, so builds are reproduciblelockfile True
05.license_present a licence file is presentfound True
05.secrets_in_history no credential-shaped string was ever added outside test and fixture pathspatterns 8 · truncated False · added lines 511,247
05.container_runs_as_root every shipped Dockerfile drops to a non-root user or builds on a non-root base imagedockerfiles 1
05.secrets_management_pattern no environment file is committed outside tests and examplesenv files 0
05.supply_chain_pinning third-party build steps are pinned, or fewaction refs 25 · pipe to shell 0 · unpinned third party 1
05.shell_from_strings product code does not build shell commands from stringssites 0
05.unsafe_deserialization no code-executing deserialiser in product codesites 0
05.tls_verification_off no TLS verification is switched off in product codefiles 0 · sites 0 · pinned instead 0
05.privileged_workloads no workload runs privileged or in the host's namespacessites 0 · behind a setting or built here 0
05.credentials_in_deploy_config deployment configuration references secrets, never holds themfiles 0 · sites 0
05.signing_material no signing keystore or profile is committedfiles 0
05.license_vendored_unlicensed no vendored third-party code is committedcomponents 0
05.license_grant_unclear the licence is recognisable as Apache-2.0class permissive · license Apache-2.0
05.committed_native_libraries no widely used compiled library is committed to the productlibraries 0
04.deprecations_lingering few deprecations have outlived two yearsolder than two years 2 · files with deprecations 47
04.dependency_churn few dependencies were added and dropped within 60 daysdependencies seen 114 · added in two years 3 · removed within 60 days 0
04.ci_platforms_dropped no platform was dropped from CI in the last two years
04.repository_status the README's first screen states no end, move or freezestatements 0
02.development_elsewhere nothing says development happens elsewhereno pr statements 0 · mirror statements 0 · replayed commit share 0.0
05.licence_changes the root licence has not changed in the history readlicence versions 1 · unreleased changes 0
05.paid_edition no directory carries a separate paid-edition licencedirectories 0
04.releases_stopped releases keep pace with developmentmedian gap days 39.0 · days since last tag 198 · commits last 90 days 0
04.release_branch the newest release was cut from the branch surveyedelsewhere 3 · on branch 227 · tags in window 230
03.single_maintainer no file says one person maintains itstatements 0

Could not conclude, or did not apply — 28

Not a clean result. Each says why it could not answer here.

SignalWhy
04.eol_runtimeno pinned runtime version to check
04.fixes_with_teststoo few fixes in 24 months to judge
04.fix_share_trendfewer than six busy quarters to compare
04.schema_churnno schema migrations to read
06.print_logginga frontend: console output is the browser's, not the server's
06.alert_rulesno alert rules in the repository; they may live in a console
06.probes_identicalno Kubernetes probes
06.single_replicano Kubernetes deployments
06.release_markersfewer than 100 commits in the last year
06.feature_flagsno feature-flag service; flags may live elsewhere
03.second_contributor_attritionthe repository itself is quiet
03.joiners_and_leaverstoo few regular contributors to see a trend
02.revert_sharetoo few recent commits to judge how often change is undone
02.long_lived_branchestoo few merges to judge (squash and rebase leave none)
02.commit_sizetoo few recent commits
01.notebook_outputsnot a data or machine-learning repository
05.outbound_timeoutsnot assessed for Java, the language the product is written in: this check's patterns read other languages only
05.migration_reversibilitytoo few migrations to judge
05.resource_limitsno Kubernetes workload manifests
05.public_env_secretnot assessed for Java, the language the product is written in: this check's patterns read other languages only
05.unsafe_htmlnot assessed for Java, the language the product is written in: this check's patterns read other languages only
05.cleartext_trafficnot a mobile app
05.dataset_provenancenot a data or machine-learning repository
05.license_copyleft_inheritedno third-party code is committed to this repository, so the licences it depends on are resolved at build time and are not readable here
05.license_manifest_conflictno packaging manifest states a licence
04.flags_accumulatingfew or no feature flags in the history
05.project_advisoriesrecord incomplete: no advisory found in the sources that answered; NVD: 2 records name zipkin with nothing tying them to this repository (CVE-2026-41310, CVE-2026-81870)
05.project_exploitedno affecting advisory is on CISA's Known Exploited list
BOREHOLE READING NOT A CERTIFICATION 31VY-8QAY-GNBK 2026-10-23 · 878CE2A BOREHOLE.DEV/VERIFY

Anyone can check this report against the authoritative record — click the stamp, or enter 31VY-8QAY-GNBK at borehole.dev/verify.

The code commits to the 106 checks this run performed, the bands they produced, and the commit they were read at. It does not cover checks written since.

Put the mark in your README

The image is wrapped in a link to the verification page, so a reader can check it rather than take it on trust. If you embed it: link it to the report, remove it if the report is delisted, and do not present it as a certification or an endorsement.

[![Borehole reading, not a certification](https://borehole.dev/badge/openzipkin/zipkin/878ce2a.svg "Borehole free reading: not for reliance. See the full report.")](https://borehole.dev/verify/31VY8QAYGNBK?via=badge)

Borehole reading 31VY-8QAY-GNBK, not a certification

Where this scan ran

This scan ran on ordinary cloud infrastructure (cloud-run), not in a hardware-isolated confidential VM. Nothing about it is attested by Google.

What an attested survey proves, and what it does not.

What this scan did with the repository — 7 steps

Written by the steps themselves as they ran, not described afterwards. A hand-written account of a data flow drifts the first time somebody changes the flow and not the account.

AtStepDetail
0.0s read repository metadata from the GitHub API size mb: 76.1authenticated: False
14.0s cloned the repository to a temporary directory depth: full
18.0s read the git history commits: 3003tracked files: 818
91.5s ran the deterministic checks blame pass: Trueread working tree: False
91.5s recorded where this scan ran attested: Falseenvironment: cloud-run
113.8s kept the facts, never the source, for re-reading under new checks
113.8s deleting the working copy

Total 113.8s ·source content sent off this machine: none · calls to a language model: 0 · the clone was deleted when the survey ended

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).

BOREHOLE 0.7.15 DETERMINISTIC LAYER · NO MODEL CALLSREAD ON BOREHOLE'S SERVER · CLONE DELETED TAKEDOWNCONTRIBUTED TO THIS REPOSITORY? YOUR RIGHTS