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pyrefly

PyPI

Is pyrefly safe to use?

Based on the latest brin safety scan, no vulnerabilities or threats were detected for pyrefly v0.51.1. Trust score: 60/100. No known CVE vulnerabilities, no detected threat patterns, and no suspicious capabilities identified. This is an automated, point-in-time assessment.

Install (safety-checked)

pyrefly Passed Security Checks

No security concerns detected

clean
CVEs

0

Threats

0

Install Scripts

0

No Concerns Detected

No security concerns detected in the latest brin assessment. This is an automated, point-in-time evaluation — security posture may change.

This is an automated, point-in-time assessment and may contain errors. Findings are risk indicators, not confirmed threats. Security posture may change over time. Maintainers can dispute findings via the brin review process.

pyrefly Capabilities & Permissions

What pyrefly can access when installed. Review these capabilities before using with AI agents like Cursor, Claude Code, or Codex.

Network Access

This package makes network requests.

169.254.169.254api.github.comarchive.ics.uci.eduarxiv.orgauth0.combiodiversityinformatics.amnh.orgbitbucket.orgbugs.python.orgcloud.google.comcolah.github.io+63 more
Protocols: http, https, tcp

Filesystem Access

Reads and writes to the filesystem.

.env (r).env (r).env (r).env (r).env (r).env (r).env (r).env (r)+58 more

Process Spawning

This package can spawn child processes.

Environment Variables

Accesses the following environment variables.

TZ

Native Modules

Contains native code that runs outside the JavaScript sandbox.

ctypesnumpypandaspsycopg2scipy

AGENTS.md for pyrefly

Good instructions lead to good results. brin adds pyrefly documentation to your AGENTS.md so your agent knows how to use it properly—improving both safety and performance.

brin init

Vercel's research: 100% accuracy with AGENTS.md vs 53% without →

pyrefly Documentation & Source Code

For the full pyrefly README, API documentation, and source code, visit the official package registry.

View on PyPIView Source

Frequently asked questions about pyrefly safety

Weekly Downloads

505.6K

Version

0.51.1

Last Scanned

Feb 6, 2026

Trust Score

60/100·Legitimacy signals, not safety

Capabilities

Network

Connects to: 169.254.169.254, api.github.com, archive.ics.uci.edu...

Filesystem

Reads & Writes files

Process

Spawns child processes

Environment

Accesses: TZ

Native

Contains native modules