Read 2026-10-04
nlohmann/json: technical due diligence, read from its repository
What Borehole read in nlohmann/json's code and history at 633de8e: its licence, security advisories, releases, review practice, tests, dependencies and operations. Every finding cites the file and line it rests on. The full report also covers the team and asks the questions the code cannot answer.
| Dimension | Rating |
|---|---|
| Architecture & Codebase — including AI provenance | strong |
| Engineering Process & SDLC Maturity | strong |
| Product & Engineering Maturity | adequate |
| Security & Reliability Posture | not assessable |
| Observability & Operations | not assessable |
| Fit with the Acquirer | not assessable |
What the repository says
- No release for 17 months while development continues
- Releases are cut from another branch than the one surveyed
README.md:20: names OpenSSF
Architecture & Codebase — including AI provenance
stronginclude/nlohmann/json.hpp is 6,628 lines, 194× this codebase's median file
adequateThe median source file here is 34 lines. 8 files exceed 1,000 lines, the largest being 6,628. 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.
include/nlohmann/json.hpp:1 — 6,628 lines (194× median) |
include/nlohmann/detail/input/binary_reader.hpp:1 — 4,352 lines (128× median) |
include/nlohmann/detail/output/binary_writer.hpp:1 — 2,618 lines (77× median) |
include/nlohmann/detail/input/lexer.hpp:1 — 2,338 lines (68× median) |
include/nlohmann/detail/output/serializer.hpp:1 — 1,672 lines (49× median) |
Engineering Process & SDLC Maturity
strongNo finding.
Product & Engineering Maturity
adequateNo release for 17 months while development continues
adequateThe last tag, v3.12.0, was cut 535 days before the survey; the typical gap between releases was 26 days, and 220 commits landed in the last 90 days. Users run the last release, not this code.
| last tag v3.12.0 |
Releases are cut from another branch than the one surveyed
adequateThe newest release, v3.12.0, is not on the branch this survey read; the newest release on it is v3.11.3. The shipped product may differ from what this report describes. Survey the release branch too.
| tag v3.12.0 |
Security & Reliability Posture
not assessableNot rated: only 15 of 34 checks could reach a conclusion here; the rest do not apply to this repository or could not read it.
Observability & Operations
not assessableNot rated: only 4 of 16 checks could reach a conclusion here; the rest do not apply to this repository or could not read it.
Fit with the Acquirer
not assessableNot rated: structurally not assessable from a repository.
Read more, or read your own
The full report on nlohmann/json: every dimension, the questions for the room, and the audit log.
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