Late Brake - Racing Lap Data Analysis Skill#

Late Brake is a pure command-line (CLI) racing lap data analysis tool that provides:

• Import lap data in NMEA 0183 / RaceChrono VBO formats
• Auto split laps based on track start/finish line
• Compare any two laps for time/speed differences by sector and corner
• Output structured JSON comparison results ready for AI coach analysis

Dependencies#

• Python >= 3.10
• Dependencies: click, pydantic, numpy, geographiclib, jsonschema, wcwidth

Dependencies are declared in SKILL.md, OpenClaw will handle automatic installation.

Entry Points#

Source code is directly in scripts/ directory, can be imported directly:

python

import sys
import os
SKILL_DIR = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, os.path.join(SKILL_DIR, "scripts"))
from late_brake.cli import main as late_brake_main

Or execute directly as command-line:

bash

# Load data file, list all laps
python -m late_brake.cli load <file> --json

# Compare two laps, output JSON result
python -m late_brake.cli compare <file1> <lap1> <file2> <lap2> --json

Features#

FeatureCommandDescriptionLoad data filelate-brake load <file>Parse data, auto split laps, list all detected lapsCompare two lapslate-brake compare <file1> <lap1> <file2> <lap2>Compare lap differences, output text table or JSONTrack managementlate-brake track list/info/addManage built-in/custom tracks

JSON Output Schema#

Full JSON schema definition: compare-json-schema.md

Use Cases#

• Racing drivers upload lap data files for comparison analysis
• AI racing coach needs structured comparison data to give advice
• Batch processing multiple lap data files