Terminal typing trainer focused on accuracy with constraint-based guided practice
npm install @sethwebster/typeheroTerminal typing trainer focused on accuracy first, with data-driven practice targeting your specific problem areas.
- Accuracy > Speed: Raw WPM is meaningless without accuracy
- No escape hatches: Can't skip hard exercises or hide mistakes
- Data-driven: Every keystroke tracked, analyzed, and used to generate targeted practice
- Immediate feedback: Real-time visual indicators for every character
- Adjusted WPM: Primary metric = raw WPM × accuracy²
- Real-time feedback: See mistakes instantly as you type
- Bigram tracking: Identifies your slowest character pairs
- Error analysis: Tracks most error-prone keys
- Targeted practice: Auto-generates exercises from your problem areas
- Persistent stats: All sessions saved to SQLite database ~/.typehero.db
- Multiple modes:
- Random words (common English)
- Code patterns (programming constructs)
- Targeted drills (your problem bigrams)
- Quick practice (20 words)
bash
npm install -g @sethwebster/typehero
`Or run without installing:
bash
npx @sethwebster/typehero
`$3
bash
curl -sSL https://github.com/sethwebster/typehero/releases/latest/download/typehero-installer.sh | sh
`$3
bash
cargo install typehero
`$3
bash
cargo install --path .
`Uninstallation
bash
curl -sSL https://github.com/sethwebster/typehero/releases/latest/download/uninstall.sh | sh
`Or manually:
- npm:
- cargo:
- shell installer: Remove binary from or ~/.cargo/bin/typeheroUsage
Launch the app and select a mode:
1. Guided Practice - Constraint-based finger placement training
- Teaches through constraints, not detection: Only keys from active fingers are accepted
- Progressive finger unlocking: Index → Middle → Ring → Pinky → Thumbs
- ASCII keyboard map shows active fingers in color (inactive keys greyed out)
- Illegal keys rejected (cursor doesn't advance) - shapes motor memory through negative capability
- 3-2-1 countdown before each attempt (no Enter key friction)
- Tracks illegal key violations + accuracy per attempt
- Mastery = 3 consecutive attempts at 95%+ accuracy with 0 illegal keys
- Auto-advances when lesson mastered
- Navigate: Ctrl-N (next lesson), Ctrl-P (previous lesson)
2. Random Words - Practice common English words
3. Code Patterns - Programming-specific patterns
4. Targeted Practice - Auto-generated from your slowest bigrams
5. Quick Drill - Short 20-word session
6. View Statistics - See lifetime stats and problem areas
7. Quit
$3
- Type exactly what you see
- No backspace - mistakes stay visible
- ESC to quit (you'll get a reminder to push through if quitting early)
- Session ends when you complete the text
$3
- Raw WPM: (characters / 5) / minutes
- Accuracy: (correct_chars / total_chars) × 100
- Adjusted WPM: Raw WPM × (accuracy/100)²
Example: 60 WPM at 90% accuracy = 60 × 0.81 = 48.6 adjusted WPM
Rules
1. No backspace - Forces correct typing first time
2. 95% accuracy target - Anything less = needs improvement
3. Stats never reset - Own your progress
Tips for Improvement
1. Slow down - Speed comes from accuracy, not rushing
2. Focus on problem bigrams - Use targeted practice mode
3. Watch the current character - It's highlighted in blue
4. Don't look at your hands - Force muscle memory
5. Consistent practice - 15 minutes daily > 2 hours weekly
Stats Location
All statistics are saved to
(SQLite database)Tables:
-
sessions: Session summaries (timestamp, WPM, accuracy)
- metadata: Total keystrokes and errors
- key_errors: Per-key error counts
- bigrams: Aggregated bigram timing data with rolling averagesMigration: Legacy JSON stats (
~/.typehero_stats.json) are automatically imported on first runArchitecture
See
AGENTS.md` for detailed architecture and design principles.