8d5a2d9 · 2,346 commits · 495 files
Issued 2026-09-29
Reads strong: 3 of 5 rated dimensions are strong, 2 are adequate and none is significant.
105 checks ran across 6 assessable dimensions. Security & Reliability Posture and Architecture & Codebase — including AI provenance are adequate. 4 findings, each with evidence. One dimension cannot be assessed without an acquirer.
- Words about people are today's: bands rather than exact shares, dates or day counts, and what the history measured rather than why.
- 1 finding from checks Borehole's calibration found wrong more often than right is no longer published.
| Dimension | Rating | ||
|---|---|---|---|
| 01 | Architecture & Codebase — including AI provenance | adequate | |
| 02 | Engineering Process & SDLC Maturity | strong | |
| 03 | Organization & Key-Person Risk | strong | |
| 04 | Product & Engineering Maturity | strong | |
| 05 | Security & Reliability Posture | adequate | |
| 06 | Observability & Operations | not assessable | |
| 07 | Fit with the Acquirer | not assessable |
- 25% 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 495 of 495 counted files
Architecture & Codebase — including AI provenance
01 · adequate · ratings ↑profiling/list_huge.py is 22,432 lines, 448× this codebase's median file
adequateThe median source file here is 50 lines. 11 files exceed 1,000 lines, the largest being 22,432. 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.
| line-count | profiling/list_huge.py:1 — 22,432 lines (448× median) |
| line-count | profiling/dict_big.py:1 — 8,002 lines (160× median) |
| line-count | profiling/list_big.py:1 — 4,001 lines (80× median) |
| line-count | src/black/trans.py:1 — 2,662 lines (53× median) |
| line-count | src/black/linegen.py:1 — 2,463 lines (49× median) |
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 · strong · ratings ↑No finding. 10 checks ran and none fired; the rejection log below says why each did not.
Product & Engineering Maturity
04 · strong · ratings ↑No finding. 19 checks ran and none fired; the rejection log below says why each did not.
Security & Reliability Posture
05 · adequate · ratings ↑1 Dockerfile runs the application as root
adequateNo USER instruction switches away from root, so the process runs with full privileges inside the container. It is a one-line fix and an ordinary expectation, which is why its absence is worth asking about: it usually says more about whether anyone has reviewed the deployment than about this container specifically.
| no-USER-instruction | Dockerfile — runs as root |
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.
3 deserialisers that can run code
adequate3 places read data with a deserialiser that executes what it reads (pickle, `yaml.load` without a safe loader, object streams, `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.
| src/black/cache.py | src/black/cache.py:80 — code-executing deserialiser |
| src/blib2to3/pgen2/grammar.py | src/blib2to3/pgen2/grammar.py:124 — code-executing deserialiser |
| src/blib2to3/pgen2/grammar.py | src/blib2to3/pgen2/grammar.py:129 — code-executing deserialiser |
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.
2 advisories against this project in the last 24 months, 2 high or critical
adequateThe newest was published on 2026-03-12. A project that publishes advisories is telling its users about its fixes, and the count and pace say how much security work it carries. None of them affects the surveyed version.
| GHSA-3936-cmfr-pm3m | 2026-03-12: GHSA-3936-cmfr-pm3m (high), fixed in 26.3.1: Black: Arbitrary file writes from unsanitized user input in cache file name |
| PYSEC-2026-2120 | 2026-03-06: PYSEC-2026-2120 (high), fixed in 26.3.0: |
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 · not assessable · ratings ↑Not rated: only 5 of 16 checks could reach a conclusion here; the rest do not apply to this repository or could not read it. What a person adds here.
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
1 check 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.
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- Is the architecture right for the next three years of the product?
- Were the home-grown components reasonable choices when they were made, and are they now?
Engineering Process & SDLC Maturity
02 · high coverage- Is review real or a rubber stamp? Comment depth and time to approve need the pull request history.
- Is delivery planned and measured, or heroic?
- How are incidents run, reviewed and learned from?
Organization & Key-Person Risk
03 · partial coverage- measured 562 people have committed here. Which of them are you acquiring, and which are you replacing?
- Who mentors whom, and would that survive a departure?
- Can the team grow, and who stands behind the top three contributors?
- Is the seniority mix sound, and will pay survive your salary bands?
- Is the pace sustainable? Commit times cannot say: git keeps no reliable local time.
- Does the team want to stay after close?
- How are decisions made and disagreements resolved?
Product & Engineering Maturity
04 · minimal coverage- measured 242 commits landed in the last year, against 103 the year before (+135%). What drove it: new people, a deadline, or code produced faster than before?
- Can this team deliver the stated roadmap on the stated timeline?
- Does leadership know about the debt, and is time budgeted to repay it?
- Is the engineering shape consistent with the commercial story?
Security & Reliability Posture
05 · partial coverage- What has actually broken, how often, and how badly?
- What did external testing find, and was it fixed?
- What is the SOC 2, ISO 27001 or GDPR status, and where is the evidence?
Observability & Operations
06 · partial coverageNot rated: only 5 of 16 checks could reach a conclusion here; the rest do not apply to this repository or could not read it.
- Are the dashboards opened, the alerts acknowledged and the pages answered?
- Are the service-level objectives actually met?
- Who carries the pager, and how often does it go off?
- What does it cost to run, and how much headroom is there?
Fit with the Acquirer
07 · none coverageNot rated: structurally not assessable from a repository.
- This is primarily a Python codebase. Does your engineering organisation already run Python in production, or would this be the first?
- The bulk of this system sits in profiling/, src/, autoload/. Which of your existing systems would each of those have to absorb or replace?
- The repository carries deployment configuration (Dockerfile). Does that match your deployment and on-call model, or does it need rehosting first?
- 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?
- Which of these systems duplicate yours, and which get retired?
- What will integration cost, and in what order?
- Where does the team land in your organisation, and who reports to whom?
- Are there earn-outs, retention packages or contractor IP to assign?
- Do customer contracts limit hosting, regions or vendors?
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.
[](/r/psf/black/8d5a2d9)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.
Rejection log — 101 signals that ran and did not fire
Appendix: rejection log — 101 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
| Signal | What it found |
|---|---|
| 04.hotspot_concentration | change is spread across the codebase rather than pooling in a few filesfiles 1,077 · top5 share 0.241 |
| 04.debt_markers | debt markers are sparsemarkers 15 · per kloc 0.16 · lines read 96,566 |
| 04.dependency_sprawl | direct dependency counts are unremarkable |
| 04.test_growth | test effort kept pace with code writtenlate test per code 1.36 · early test per code 0.187 |
| 04.churn_trend | rework is not rising against new worklate delete per insert 0.565 · early delete per insert 0.155 |
| 04.eol_runtime | every pinned runtime is still supportedeol as of 2026-09-24 |
| 04.fixes_with_tests | fixes usually come with a testfixes 107 · share 0.514 · with tests 55 |
| 06.telemetry_presence | this repository does not deploy a running service, so instrumentation is not expected of itbasis nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere · files read 463 |
| 06.structured_logging | not a running service; structured logging is not expected of a librarybasis nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere |
| 06.healthcheck_presence | not a running service, so a health endpoint is not expectedbasis nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere |
| 06.usage_reporting_default | the product's code names no reporting hostsettings on 0 · settings off 0 |
| 06.migrate_on_start | migrations do not run at container start |
| 03.contributor_concentration | no single contributor dominates the last 24 monthsyears 8.5 · window last 24 months · authors 562 |
| 03.active_contributors | more than one contributor active in the trailing yearall time 562 · active 12mo 108 |
| 03.drive_by_contributors | an open contributor base, where one-commit contributors are normalauthors 562 · one off share 0.781 |
| 03.contributor_attrition | no contributor dominates enough for their absence to matterauthors 562 · top share less than a quarter · top contributor last committed more than three years ago |
| 03.critical_path_ownership | more than one person changes the critical pathsauthors 128 |
| 03.second_contributor_attrition | the second and third contributors are still active |
| 03.bus_factor_trend | the team has not narrowed to one person |
| 03.joiners_and_leavers | the team is not shrinkingleft 0 · joined 10 · regular last year 14 |
| 02.merge_discipline | a meaningful share of recent change carries evidence of reviewmerges 0 · window last 24 months · with tracked 16 |
| 02.ci_presence | CI configuration is present in the working treecount 13 |
| 02.test_presence | tests are present in a normal proportion to sourcetests 303 · source 355 · test ratio 0.854 |
| 02.release_cadence | tags are presenttags 73 |
| 02.conventional_commits | commit subjects generally carry contentsampled 2,344 · low content share 0.012 |
| 02.branch_protection_hints | process scaffolding is present in the repository |
| 02.ci_runs_tests | CI invokes a test runnerconfigs 13 · with tests 3 |
| 02.skipped_tests | few tests are switched offfocused 0 · skipped 0 · test files 339 |
| 02.ci_test_gating | no test run in CI is written so that it cannot failconfigs 13 |
| 02.revert_share | change is rarely undoneshare 0.012 · reverts 4 · recent commits 345 |
| 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 13 · ci configs 13 · product files 52 |
| 02.commit_size | changes arrive in reviewable sizesshare 0.0 · commits 300 · over 2000 lines 0 |
| 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 6,595 · share of insertions 0.0328 |
| 01.message_uniformity | commit subjects vary in wording and lengthlength stdev 17.74 · repeat share 0.004 |
| 01.revision_depth | most files were revisited after they were first writtenfiles seen 71 · write once share 0.155 |
| 01.duplicated_blocks | little shipping code is repeated verbatim across filesshare 0.0041 · product files 50 · distinct blocks 23,282 |
| 01.swallowed_errors | errors are rarely thrown awayloc 96,921 · files 9 · per kloc 0.12 |
| 01.build_reproducibility | every base image names a versionfloating 0 · from lines 2 |
| 01.unfinished_migration | no language migration is stalled halfway |
| 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 463 |
| 05.security_guardrails | at least one standard guard rail is configured |
| 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 183,605 |
| 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 68 · pipe to shell 0 · unpinned third party 0 |
| 05.shell_from_strings | product code does not build shell commands from stringssites 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_manifest_conflict | manifest and licence file agree on MITlicense MIT |
| 05.license_vendored_unlicensed | no vendored third-party code is committedcomponents 0 |
| 05.license_grant_unclear | the licence is recognisable as MITclass permissive · license MIT |
| 05.committed_native_libraries | no widely used compiled library is committed to the productlibraries 0 |
| 04.dependency_churn | few dependencies were added and dropped within 60 daysdependencies seen 79 · added in two years 5 · 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 49.5 · days since last tag 134 · commits last 90 days 91 |
| 04.release_branch | the newest release was cut from the branch surveyedelsewhere 3 · on branch 70 · tags in window 73 |
| 03.single_maintainer | no file says one person maintains itstatements 0 |
| 05.project_advisories | no published advisory affects the surveyed versionaffecting 0 · exploited 0 · advisories 3 |
| 05.project_exploited | no affecting advisory is on CISA's Known Exploited listexploited 0 |
Could not conclude, or did not apply — 33
Not a clean result. Each says why it could not answer here.
| Signal | Why |
|---|---|
| 04.fix_share_trend | fewer than six busy quarters to compare |
| 04.schema_churn | no schema migrations to read |
| 04.compat_layers | a library, whose compatibility code is usually deliberate |
| 04.dependency_redundancy | no JavaScript manifest to read |
| 06.telemetry_depth | not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere |
| 06.print_logging | not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere |
| 06.correlation_ids | not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere |
| 06.error_reporting | not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere |
| 06.alert_rules | not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere |
| 06.deployed_image_floats | not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere |
| 06.probes_identical | no Kubernetes probes |
| 06.single_replica | no Kubernetes deployments |
| 06.environment_branching | not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere |
| 06.release_markers | not expected of it: nothing in this repository deploys a long-running server; if it runs as one, its deployment lives elsewhere |
| 06.feature_flags | no feature-flag service; flags may live elsewhere |
| 02.dependency_update_cadence | no lockfile to date |
| 02.long_lived_branches | too few merges to judge (squash and rebase leave none) |
| 01.notebook_outputs | not a data or machine-learning repository |
| 05.dependency_pinning | no manifest whose pinning can be read without a lockfile |
| 05.outbound_timeouts | not a running service |
| 05.migration_reversibility | too few migrations to judge |
| 05.sql_from_strings | not a running service; a library that builds SQL is doing its job |
| 05.resource_limits | no Kubernetes workload manifests |
| 05.known_vulnerabilities | no lockfile this survey can read, or a collector older than 0.4.0 |
| 05.public_env_secret | not a frontend |
| 05.unsafe_html | not a frontend |
| 05.source_maps_shipped | not a frontend |
| 05.cleartext_traffic | not a mobile app |
| 05.dataset_provenance | not a data or machine-learning repository |
| 05.license_copyleft_inherited | 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 |
| 04.flags_accumulating | few or no feature flags in the history |
| 04.api_versions_coexisting | not a running service |
| 04.deprecations_lingering | a library, which keeps deprecated interfaces for its users |
Anyone can check this report against the authoritative record — click the stamp, or enter AX1E-0N9N-FEZ6 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.
[](https://borehole.dev/verify/AX1E0N9NFEZ6?via=badge)
A survey is a reading by a particular version of the assessor. Older readings are kept rather than replaced, because a verification mark attests to the survey it was issued for — overwriting one would make every code already in circulation read as tampered.
| Read | Assessor | Findings | Band |
|---|---|---|---|
| 2026-09-29 · shown | borehole 0.7.6 | 5 | strong |
12 other readings (show)
| 2026-10-04 | borehole 0.7.13 | 5 | strong |
| 2026-10-03 | borehole 0.7.12 | 5 | strong |
| 2026-10-03 | borehole 0.7.11 | 5 | strong |
| 2026-10-02 | borehole 0.7.10 | 5 | strong |
| 2026-10-01 | borehole 0.7.9 | 5 | strong |
| 2026-09-30 | borehole 0.7.8 | 5 | strong |
| 2026-09-28 | borehole 0.7.5 | 5 | strong |
| 2026-09-28 | borehole 0.7.4 | 5 | strong |
| 2026-09-27 | borehole 0.7.3 | 4 | strong |
| 2026-09-27 | borehole 0.7.2 | 5 | strong |
| 2026-09-27 | borehole 0.7.1 | 5 | strong |
| 2026-09-26 | borehole 0.7.0 | 5 | strong |
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.
| At | Step | Detail |
|---|---|---|
| 0.0s | read repository metadata from the GitHub API | authenticated: False |
| 2.0s | cloned the repository to a temporary directory | depth: full |
| 3.5s | read the git history | commits: 2346tracked files: 495 |
| 35.0s | ran the deterministic checks | blame pass: Trueread working tree: False |
| 35.0s | recorded where this scan ran | attested: Falseenvironment: cloud-run |
| 48.8s | kept the facts, never the source, for re-reading under new checks | |
| 48.8s | deleting the working copy |
Total 48.8s ·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).