Is zlib-ng/zlib-ng the fork of madler/zlib?
zlibng-zlib · status observed
Data verified at: 2026-09-11T16:52:53Z (UTC)
Conclusion status
No confirmed conclusion exists for this pair. The evidence below is presented for
transparency; a relationship conclusion requires a human review that has not happened,
or a previous decision no longer matches the current evidence.
No directional succession or fork claim was found; the current evidence does not establish the researched relationship.
Seed context: Research question: is zlib-ng a fork/replacement of zlib, and does it claim succession?
Observed repository facts
As of the last verified collection. These are facts about the snapshots, not
activity verdicts — a low number is not a claim that a project is inactive.
Versions & deployment facts
Official release and package declarations, compared independently of the relationship verdict.
These are not installation tests or a migration guarantee. Missing declarations mean unknown.
zlib-ng/zlib-ng
GitHub release · 2.3.3
Official source
GitHub latest published non-prerelease (not a semantic-version ranking). Verified: 2026-09-16T11:13:53.818Z (UTC).
Listed release assets only. Asset names do not prove platform support or successful execution.
- Runtime declarations
Not declared / unknown
- Operating systems
Not declared / unknown
- CPU architectures
Not declared / unknown
- C libraries
Not declared / unknown
- Direct dependency declarations
Not declared / unknown
Published artifacts (6)
Provenance
Parser: software-1
First observed: 2026-09-16T11:13:53.818Z (UTC)
Last checked: 2026-09-16T11:13:53.818Z (UTC)
Source response SHA-256: cfe6897d6e2d44ec69b458719d90fcbb7fb1f48756d7d74dbe340bd994a4d298
madler/zlib
GitHub release · v1.3.2
Official source
GitHub latest published non-prerelease (not a semantic-version ranking). Verified: 2026-09-16T11:13:53.818Z (UTC).
Listed release assets only. Asset names do not prove platform support or successful execution.
- Runtime declarations
Not declared / unknown
- Operating systems
Not declared / unknown
- CPU architectures
Not declared / unknown
- C libraries
Not declared / unknown
- Direct dependency declarations
Not declared / unknown
Published artifacts (6)
Provenance
Parser: software-1
First observed: 2026-09-16T11:13:53.818Z (UTC)
Last checked: 2026-09-16T11:13:53.818Z (UTC)
Source response SHA-256: 0e11c2b4915226969a48244c3d17944b2535340d57b21c9cdb9b50a839bcddd3
Timeline
“Event time” is an upstream timestamp when the source provides one; “first observed” is when
this project saw it. They are deliberately separate columns.
Decision and dispute history
Review decisions are recorded privately with reasons that stay internal; this
public history shows what happened and when, not why.
To question this report, use the feedback form,
select “data error”, and include pair ID zlibng-zlib.
Feedback is reviewed privately and does not change a report automatically.
Snapshot taken at 2026-09-16T13:11:39.533Z (UTC).