Network Speed Test

Measure network download speed, upload speed, and latency from the command line. Uses Cloudflare speed test endpoints and public DNS for latency measurements...

Security Scan

The skill's code and instructions match its stated purpose (measuring download/upload/latency), request no credentials, and perform only network tests against public endpoints — no signs of hidden exfiltration or unrelated access.

Purpose & Capability

Name/description (network speed testing) align with the included script: it performs TCP latency probes and download/upload tests to public endpoints (Cloudflare). No unrelated credentials, binaries, or config paths are requested.

Instruction Scope

SKILL.md instructs running the included Python script and only references network tests and JSON output. The runtime instructions do not ask the agent to read local files, environment variables, or transmit data to unexpected endpoints.

Install Mechanism

No install spec (instruction-only), and the SKILL includes a Python script that uses only the standard library. This is low-risk, but note the skill contains executable code that will perform network I/O when run (no installer needed).

Credentials

The skill requires no environment variables or credentials. All network endpoints are public and described in the SKILL.md. No excessive or unrelated secrets are requested.

Persistence & Privilege

Skill does not request persistent/system-wide presence (always:false). It does not modify other skills or system configs. The default ability for autonomous invocation is unchanged and not combined with other red flags.

Assessment

This skill appears coherent and limited to measuring network performance. Before running it, be aware that: (1) it will make outbound network connections to speed.cloudflare.com and perform TCP connects to public DNS IPs (1.1.1.1, 8.8.8.8, 9.9.9.9); (2) default tests transfer ~10 MB down / 5 MB up (you can reduce --size to limit bandwidth); (3) it contains a runnable Python script (no installer) so running it executes active network I/O — review the script if you want to confirm behavior. If you are comfortable with those network targets and data usage, this skill is consistent with its description.

Measure download, upload, and latency with zero dependencies.

Commands

All commands use scripts/speed_test.py.

Run All Tests

python3 scripts/speed_test.py --all
python3 scripts/speed_test.py --all --json

Individual Tests

python3 scripts/speed_test.py --download
python3 scripts/speed_test.py --upload
python3 scripts/speed_test.py --latency

Custom Test Size

python3 scripts/speed_test.py --download --size 25   # 25 MB download test
python3 scripts/speed_test.py --all --size 50         # 50 MB download, 25 MB upload

JSON Output

python3 scripts/speed_test.py --all --json

Returns structured JSON with timestamp, latency stats (avg/min/max/jitter per host), download speed (Mbps), and upload speed (Mbps).

Latency Targets

Tests TCP connection latency to Cloudflare DNS (1.1.1.1), Google DNS (8.8.8.8), and Quad9 (9.9.9.9). Reports average, min, max, and jitter for each.

Notes

• Download uses Cloudflare speed test endpoint
• Upload uses Cloudflare speed test endpoint
• Default test size: 10 MB download, 5 MB upload
• No API keys or accounts required