# Step 0 — Scaffold

## What this step delivers

A buildable Go binary (`latprobe`) that parses flags and URLs, prints usage
when invoked without arguments, and exits cleanly. No measurement logic yet —
the full implementation is wired in during Steps 1–4.

## Build

```sh
cd go
go build -o latprobe .
```

## Usage

```sh
# No arguments → prints usage and exits with code 1
./latprobe

# With a URL → scaffold message until Step 1 is implemented
./latprobe https://example.com
```

Expected output (scaffold stage):

```
latprobe — measure per-phase HTTP request latency

Usage:
  latprobe [flags] <url> [url ...]

Flags:
  -n, --count int   Number of requests per URL (default 1)
      --json        Output results as JSON instead of text
  -h, --help        Show this help

Examples:
  latprobe https://example.com
  latprobe -n 5 https://example.com https://www.google.com
  latprobe --json https://example.com | jq .
```

## Available flags (accepted by the parser, not yet functional)

| Flag | Short | Default | Description |
|------|-------|---------|-------------|
| `--count` | `-n` | `1` | Number of requests per URL |
| `--json`  | —    | false | Output as JSON instead of text |
| `--help`  | `-h` | —     | Show usage |