Useragent Parser

An AI-oriented toolkit for user-agent string analysis. Configure parsing rules, benchmark performance, compare results, manage prompts, evaluate accuracy, fine-tune models, analyze patterns, track costs, monitor usage, optimize workflows, run tests, and generate reports — all with persistent logging and history.

Why Useragent Parser?

• Works entirely offline — your data never leaves your machine
• Simple command-line interface, no GUI needed
• Persistent timestamped logging for every action
• Export to JSON, CSV, or plain text anytime
• Built-in search across all logged entries
• Automatic history and activity tracking

Commands

Each action command (configure, benchmark, compare, etc.) works in two modes:

• With arguments: Logs the input with a timestamp and saves it to the corresponding log file
• Without arguments: Displays the 20 most recent entries from that category

Data Storage

All data is stored locally at ~/.local/share/useragent-parser/. Each command category maintains its own .log file with timestamped entries in timestamp|value format. A unified history.log tracks all activity across commands. Use export to back up your data in JSON, CSV, or plain text format at any time.

Requirements

• Bash 4.0+ with set -euo pipefail support
• Standard Unix utilities: date, wc, du, tail, grep, sed, cat
• No external dependencies or API keys required

When to Use

1. Benchmarking UA parsing engines — Compare performance and accuracy of different user-agent parsing approaches with logged results
2. Analyzing browser and device patterns — Use analyze and compare to track user-agent string patterns across datasets
3. Fine-tuning detection models — Log fine-tune and evaluate sessions to track improvements in bot detection and device fingerprinting
4. Tracking API usage and costs — Use cost and usage commands to monitor parsing operation expenses over time
5. Generating compliance and analytics reports — Export parsed data in JSON, CSV, or text format for downstream analytics pipelines

Examples

# Analyze a user-agent string
useragent-parser analyze "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36"

# Benchmark parsing speed
useragent-parser benchmark "10000 UA strings batch test"

# Compare two parsing engines
useragent-parser compare "uap-core vs woothee"

# Test against known bot signatures
useragent-parser test "Googlebot/2.1 (+http://www.google.com/bot.html)"

# Export all logged data as JSON
useragent-parser export json

# Search for Chrome-related entries
useragent-parser search Chrome

# View summary statistics
useragent-parser stats

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