No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
flit-core has 42.3M monthly downloads and 2K GitHub stars. Version 3.12.0 supports Python 3.6+, first published in 2019.
It is stably maintained under a permissive license, last released in Mar 2025.
It is used by 24 tracked packages, including flit, flit-scm and flit-ext.
Package Insights
Package Risks
- No releases in 400 days despite active commits
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
80
Popularity
68
Adoption
60
Community
70
Provenance
100
How the maintenance status was determined
Last commit
69 days ago
Monthly downloads
42,315,770
Active
Activity within 30 days
•
Stable
Activity within 31-180 days
Minimal
Activity within 181-365 days, or no activity data
At Risk
No activity for > 365 days, but > 10,000 monthly downloads
Archived
Repository flagged as archived on GitHub
How the popularity category was determined
Monthly downloads
42,315,770
Stars
2,247
Stars per 1k downloads
0.05
•
Industry Standard
> 10,000,000 monthly downloads
Hidden Gem
< 0.5 stars per 1k downloads and > 100,000 monthly downloads
Community Favorite
> 5 stars per 1k downloads
Rising Star
Balanced ratio of stars to downloads
Unknown
Fewer than 1,000 monthly downloads, or no star data
How download momentum is calculated
Week daily avg
1,266,145
Month daily avg
1,410,526
Momentum
-10.2%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python version support tiers
requires_python
>=3.6
Cutting Edge
Minimum supported version is 3.12 or newer
Modern
Minimum supported version is 3.9, 3.10, or 3.11
•
Legacy
Supports 3.8 or older (or Python 2)
Unknown
No requires_python specified or unparseable
License categories
License
BSD-3-Clause
•
Permissive
MIT, Apache, BSD, ISC, Unlicense, CC0, etc.
Copyleft
GPL, LGPL, AGPL, MPL, EPL, etc.
Proprietary
Commercial, all rights reserved, custom EULAs
Unknown
No license specified, or none of the above match
How the release cadence was determined
Last release
469 days ago
Total releases
23
Releases/year
3.5
Rapid
Last release within 365 days and > 12 releases/year
Regular
Last release within 365 days
•
Slow
Last release 366-730 days ago
Stalled
Last release > 730 days ago, or no releases
Unknown
No usable release date available
How contributor risk was determined
Contributors
126
Monthly downloads
42,315,770
High Load
≤ 2 contributors and ≥ 50,000 monthly downloads
Moderate Load
< 10 contributors and ≥ 500,000 monthly downloads
Low Load
< 25 contributors and ≥ 5,000,000 monthly downloads, or sole maintainer with ≥ 10,000 monthly downloads
•
Balanced
Enough contributors for the package's popularity
Unknown
No contributor data available
Engagement
72
Issue Burden
50.7
per 1k stars
Discussions
4.9
per 1k stars
Fork Ratio
80.8%
contrib / forks
Stale Release
400d
PR Velocity
Quiet
Weekly Downloads
GitHub Stars
Not all downloads include detailed metadata. Breakdowns reflect the subset that does.
Downloads by OS
Linux
1.1M
Windows
10.2K
macOS
8.2K
Python Versions
3.10
61.5%
666.9K
3.12
14.0%
151.4K
3.11
11.7%
126.5K
3.13
6.5%
70.3K
3.14
6.4%
69.7K
Top Countries
1.
US
1.0M
US
2.
SG
49.7K
SG
3.
DE
18.9K
DE
4.
GB
18.5K
GB
5.
HK
18.4K
HK
6.
NL
9.3K
NL
7.
CA
5.1K
CA
8.
CN
4.7K
CN
9.
IE
3.8K
IE
10.
IN
2.7K
IN
Dependencies
0
No dependencies
Package Information
License
BSD-3-Clause
First Release
November 17, 2019
Last Release
1 year ago
Last Commit
2 months ago
Latest Version
3.12.0
Total Releases
23
Contributors
126
Open PRs
20
Archived
No
Wheels
py2
py3
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh