Harsh Taskmaster

A minimalist, command-line tool for tracking, understanding, and forging habits. Simple text files, informative graphs, zero friction. Habit tracking for geeks.

Track habits with just 3 commands: ask, log, todo.

Your data stays in human-readable text files you can edit, back up, and own forever.

Harsh lets you see your habits in a consistency graph (aka Seinfeld chart) based on your logging of the habit over time.

My hope is that it helps you get done what you're trying to get done in your life and live a better one.

More info in the launch post and the better habit tracking post.

Quick Start

brew install harsh    # macOS/Linux
# or: yay -S harsh-bin (Arch), snap install harsh (Linux)

Run harsh ask to create your config files, then edit ~/.config/harsh/habits:

# Habits file format: Name: frequency
# Frequency: 1 = daily, 7 (or 1w) = weekly, 3/7 = 3x per week

! Morning
Meditated: 1
Journaled: 1

! Weekly
Gym: 3/7
Called Mom: 1w
Cleaned house: 7

! Tracking only (no warnings)
Coffee: 0

Commands

| Command | Description | | ----------------- | ---------------------------------------- | | harsh ask | Prompt for today's unrecorded habits | | harsh log | Show consistency graph (last 100 days) | | harsh log --json| Machine-readable JSON output for agents | | harsh todo | List today's pending habits with urgency | | harsh log stats | Summary statistics for all habits |

Filtering

All commands accept optional filters:

harsh ask gym          # Ask only habits matching "gym"
harsh log sleep        # Show only sleep-related graphs
harsh ask yday         # Ask about yesterday only (also: yd, yesterday)
harsh ask 2025-01-15   # Ask about specific date
harsh ask week         # Ask about last 7 days (also: w, last-week)

Recording Habits

When prompted [y/n/s/⏎]:

• y = Yes, did it
• n = No, missed it (breaks streak)
• s = Skip (life happened, doesn't break streak)
• ⏎ = Leave unanswered for now

Adding Notes and Amounts

Track quantities and comments with @ and # in harsh ask:

Pullups [y/n/s/⏎] y @ 25 # New personal record

The @ amount and # comment are optional. Use @ before # if using both.

Reading the Graph

                          ▄▃▃▄▆▆▅▆▇▆▄▃▄▆▃▆▃▆▂▅▄▃▄▅▆▅▃▃▆▂▄▅▄
                Meditated ━━  ━━ ━━━━━━━━━━━━━━━━ ━━━━━━━━━━
    Cleaned the apartment ━──────━──────━──────•······━─────
           Had a headache    ━  ━     ━━      ━━   ━   ━━

Yesterday's score: 66.6%

Symbol Legend

| Symbol | Meaning | | ------ | --------------------------------------------- | | ━ | Done | | ─ | Satisfied (within interval, no action needed) | | • | Skipped | | · | Skipified (within skip grace period) | | ! | Warning (streak at risk) | | | Not recorded / not due | | ▏ | Habit tracking ended |

The sparkline at the top shows daily completion percentage. The score excludes skipped habits.

Todo with Urgency

$ harsh todo
2025-01-15 Wed:
              Write    (2 days)   # 2 days before streak breaks
               Read     (1 day)
            Spanish     (Today)   # Do today or streak breaks
                Fit     (——|  )   # Streak already broken
      Bowling Night     (——|>—)   # Streak is skipping

Habits File Format

Location: ~/.config/harsh/habits (or %APPDATA%\harsh on Windows, override with HARSHPATH)

# Comments start with #
! Headings start with !

Habit Name: frequency

Frequency formats:

• 1 - Daily
• 7 or 1w - Weekly
• 3/7 - 3 times per 7 days (rolling window)
• 2/30 - Twice per month
• 0 - Track only (no warnings, doesn't affect score)

Optional end date:

Retire a habit by adding an end date (format: YYYY-MM-DD):

Old Habit: 1: 2024-06-15

After the end date:

• Habit is excluded from scoring and sparklines
• Graph shows blank after end date
• Habit no longer appears in ask or todo
• Habit name, graph, and end marker muted
• Use harsh -H log to hide ended habits from log output

NB: Do not use : in habit names (it is used as delimiter in the habit files).

Log File Format

Location: ~/.config/harsh/log

2025-01-15 : Habit Name : y : optional comment : optional amount

Entries are appended automatically. Edit manually if needed.

Installation

Package Managers (recommended)

brew install harsh              # macOS, Linux
yay -S harsh-bin                # Arch AUR
sudo snap install harsh         # Linux snap

One-Line Install (macOS/Linux)

curl -sSLf https://raw.githubusercontent.com/wakatara/harsh/master/install.sh | sh

Distro Packages

Download from releases:

• DEB: sudo apt install ./harsh_*.deb
• RPM: sudo dnf install ./harsh-*.rpm
• APK: sudo apk add --allow-untrusted harsh-*.apk

Go Install

go install github.com/wakatara/harsh@latest

Shell Completion

harsh completion bash > /etc/bash_completion.d/harsh
harsh completion zsh > "${fpath[1]}/_harsh"
harsh completion fish > ~/.config/fish/completions/harsh.fish

Options

Global options:

-C, --color string   Color output: "always", "never", "auto" (default "auto")
-H, --hide-ended     Hide habits that have an end date
-j, --json           Output in JSON format (for programmatic use)
-h, --help           Show help
-v, --version        Show version

Suppress colors for logging or piping: harsh --color never log stats

Hide ended habits from all output: harsh -H log or harsh -H log stats

JSON Output (Agents & Scripts)

Use harsh log --json for machine-readable output, suitable for AI agents (OpenClaw, Claude Code, etc.), scripts, and dashboards. The full visual consistency graph is represented as structured JSON, including 100 days of daily entry history per habit, allowing agents to detect patterns in habit performance, identify streaks and breaks, and surface insights that may not be obvious from the graph alone.

harsh log --json             # All habits
harsh log --json gym         # Filter by fragment
harsh log --json -H          # Hide ended habits
harsh log --json | jq .      # Pretty-print with jq

Output Structure

{
  "date": "2026-02-20",
  "scores": {
    "today": 85.7,
    "yesterday": 66.7
  },
  "habits": [
    {
      "name": "Meditated",
      "heading": "Morning",
      "frequency": "1",
      "target": 1,
      "interval": 1,
      "logged_today": true,
      "result": "y",
      "streak_status": "active",
      "days_until_break": 1,
      "current_streak": 45,
      "longest_streak": 92,
      "last_completed": "2026-02-20",
      "stats": {
        "days_tracked": 416,
        "streaks": 380,
        "breaks": 12,
        "skips": 24,
        "total": 0
      }
    },
    {
      "name": "Gym",
      "heading": "Fitness",
      "frequency": "3/7",
      "target": 3,
      "interval": 7,
      "logged_today": false,
      "result": null,
      "streak_status": "active",
      "days_until_break": 3,
      "current_streak": 21,
      "longest_streak": 35,
      "last_completed": "2026-02-18",
      "completed_in_window": 3,
      "stats": { ... },
      "entries": [
        {"date": "2026-02-18", "result": "y", "status": "done"},
        {"date": "2026-02-19", "result": null, "status": "satisfied"},
        {"date": "2026-02-20", "result": "n", "status": "satisfied"},
        ...
      ]
    }
  ]
}

Key Fields

streak_status — current state of the habit's streak:

| Status | Meaning | | --- | --- | | active | Streak intact, days_until_break shows remaining buffer | | broken | Streak lost, days_until_break is null | | skipping | In skip grace period, days_until_break shows remaining buffer | | tracking | Frequency 0 — informational only, no streak | | unstarted | Habit exists but has never been logged |

days_until_break — integer countdown until streak breaks. 0 means do it today or it breaks. null when not applicable (broken, tracking, unstarted).

current_streak — number of consecutive days the habit has been maintained (done, satisfied, skipped, or skipified). Computed from the full history, not just the 100-day entries window. 0 for tracking-only or unstarted habits.

longest_streak — the longest consecutive streak in the habit's full history. Useful for motivation ("your record is 92 days — you're at 45, keep going!").

last_completed — ISO date of the most recent y or s entry. null if never completed.

completed_in_window — only present for multi-day interval habits (e.g., 3/7). Shows completions in the current rolling window vs target.

logged_today / result — whether the habit has been logged today, and if so, the result (y, n, or s). result is null when not logged.

stats — lifetime statistics: total streaks (days satisfied), breaks, skips, days_tracked, and total (sum of amounts).

entries — last 100 days of daily history per habit, enabling pattern analysis. Each entry has a date, result (y/n/s or null if not logged), and status mirroring the graph symbols:

| Status | Graph | Meaning | | --- | --- | --- | | done | ━ | Completed | | satisfied | ─ | Logged n but covered by rolling window | | skip | • | Skipped | | skipified | · | Within skip grace period | | warning | ! | No entry, streak at risk | | break | | Logged n, not covered | | unrecorded | ◌ | No