No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
libcst has 70.5M monthly downloads and 2K GitHub stars. Version 1.8.6 supports Python 3.9+, first published in 2019.
It is stably maintained under a permissive license, last released in Nov 2025.
It is built on top of pyyaml, pyyaml-ft and typing-extensions. It is used by 377 tracked packages, including apache-airflow-core, openhands-aci and mutmut.
Package Insights
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
65
Popularity
69
Adoption
60
Community
80
Provenance
100
How the maintenance status was determined
Last commit
165 days ago
Monthly downloads
70,522,979
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
70,522,979
Stars
1,919
Stars per 1k downloads
0.03
•
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
1,713,796
Month daily avg
2,350,766
Momentum
-27.1%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python version support tiers
requires_python
>=3.9
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
All contributions towards LibCST are MIT licensed.
•
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
245 days ago
Total releases
65
Releases/year
9.4
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
103
Monthly downloads
70,522,979
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
80
Issue Burden
67.7
per 1k stars
Discussions
12.0
per 1k stars
Fork Ratio
45.4%
contrib / forks
Stale Release
79d
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
macOS
8.9K
Windows
3.5K
Python Versions
3.10
41.4%
424.0K
3.11
26.1%
267.1K
3.12
17.0%
174.0K
3.13
11.3%
116.0K
3.14
4.2%
42.9K
Top Countries
1.
US
924.4K
US
2.
IE
72.7K
IE
3.
SG
28.3K
SG
4.
DE
13.3K
DE
5.
KR
8.5K
KR
6.
SA
8.1K
SA
7.
CA
8.0K
CA
8.
GB
5.2K
GB
9.
SE
3.4K
SE
10.
IN
3.4K
IN
Dependencies
3
- pyyaml >=5.2
- pyyaml-ft >=8.0.0
- typing-extensions
Used By
377
- apache-airflow-core
- openhands-aci
- mutmut
- usort
- ufmt
- truss
- fiddle
- pytype
- pycln
- fixit
- django-autotyping
- flake8-async
- inspect-scout
- pyre-check
- bump-pydantic
- codeflash
- skylos
- bar-raiser
- unimport
- docstrfmt
- hypothesmith
- torchfix
- autotyping
- verify-everything
- shed
- nvidia-dali-cuda120
- dynapyt
- stubdefaulter
- crackerjack
- oida
- cisco-aibom
- pybetter
- stonefish
- torch-rbln
- fastworkflow
- pytestomatio
- stmdency
- string-fixer
- docify
- oceanbolt-sdk
- oarepo-model-builder
- gapic-generator
- hypofuzz
- docc
- cst-lsp
- vision-agent
- pyre-check-nightly
- rattle-lint
- wexample-filestate-python
- vibe-automation
Package Information
License
All contributions towards LibCST are MIT licensed.
First Release
August 7, 2019
Last Release
8 months ago
Last Commit
5 months ago
Latest Version
1.8.6
Total Releases
65
Contributors
103
Open PRs
41
Archived
No
Python Versions
3.9
3.10
3.11
3.12
3.13
3.14
Wheels
cp310
cp311
cp312
cp313
cp314
cp36
cp37
cp38
cp39
py3
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh