# Hydration Tracker

> Track daily water intake, set hydration goals, and get drink reminders. Use when logging water, setting targets, or reviewing weekly intake trends.

- Skill: `bytesagain/hydration-tracker` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add bytesagain/hydration-tracker`
- Raw SKILL.md: https://api.skillmd.com/api/skills/bytesagain/hydration-tracker/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: MIT
- Author: bytesagain (https://skillmd.com/u/bytesagain)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/bytesagain/hydration-tracker

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# Hydration Tracker

A daily water intake tracker that helps you build and maintain healthy hydration habits. Log every drink, set personalized daily goals, check your progress throughout the day, and review weekly summaries — all from the command line with local-only data storage.

## Commands

| Command | Description |
|---------|-------------|
| `drink [ml]` | Log water intake in milliliters (default: 250ml). Shows running total and goal progress with celebration when goal is reached |
| `cup` | Quick-log a cup of water (250ml) — shortcut for `drink 250` |
| `bottle` | Quick-log a bottle of water (500ml) — shortcut for `drink 500` |
| `today` | Display today's total intake vs. daily goal, with remaining amount or goal-reached indicator |
| `goal [ml]` | Set your daily hydration goal in milliliters (default: 2000ml) |
| `check` | Check if you're on track — compares current intake against expected intake based on time of day |
| `week` | Show a 7-day hydration summary with daily breakdowns, weekly total, and daily average |
| `history [n]` | Show hydration history for the last N days (default: 7, max: 30) |
| `stats` | Display overall statistics — total days tracked, total intake, and average daily intake |
| `remind` | Get a random hydration tip (e.g., "Drink a glass of water before each meal") |
| `info` | Show version info (v1.0.0) |
| `help` | Show all available commands with usage examples |

## Data Storage

- **Data directory:** `~/.water_reminder/`
- **Intake data:** `data.json` — JSON object mapping dates (YYYY-MM-DD) to cumulative daily intake in ml
- **Goal config:** `goal.json` — stores your current daily goal (default: 2000ml)
- **Max history:** 30 days of lookback for the `history` command
- All data is stored locally in JSON format; no external services, accounts, or network access required

## Requirements

- Bash 4+
- Python 3 (standard library only — used for JSON read/write)
- Standard POSIX utilities (`date`, `seq`)
- No API keys or external dependencies

## When to Use

1. **Building a daily hydration habit** — log each drink throughout the day and let the progress tracker keep you motivated with goal-reached celebrations
2. **Checking mid-day progress** — use `check` to see if your intake is on track relative to the time of day, so you can catch up before evening
3. **Reviewing weekly trends** — run `week` to see a 7-day summary with emoji indicators showing which days you hit your goal
4. **Adjusting your hydration goal** — use `goal` to increase or decrease your daily target based on activity level, weather, or health needs
5. **Getting gentle reminders** — run `remind` for evidence-based hydration tips to keep healthy habits top of mind

## Examples

```bash
# Log 300ml of water
hydration-tracker drink 300

# Quick-log a cup (250ml)
hydration-tracker cup

# Quick-log a bottle (500ml)
hydration-tracker bottle

# Check today's progress
hydration-tracker today

# Set a custom daily goal of 2500ml
hydration-tracker goal 2500
```

### Example Output

```
$ hydration-tracker drink 300
Logged 300ml. Today's total: 1200ml / 2000ml.
Almost there! Keep going!

$ hydration-tracker today
Today's intake (2026-03-18): 1200ml / 2000ml
Remaining: 800ml

$ hydration-tracker week
--- Weekly Hydration Summary ---
2026-03-18: (1200ml / 2000ml) 💧
2026-03-17: (2100ml / 2000ml) 🎉
2026-03-16: (1800ml / 2000ml) 💧
...
Weekly total: 12300ml
Daily average: 1757ml (Goal: 2000ml)

$ hydration-tracker remind
💧 Hydration Tip: Drink a glass of water before each meal.
```

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