WHOOP for AI-Assisted Development

There is no ETA in vibe coding. We fix that.

Claude thinks your project takes 2 months. It takes 16 hours of vibe coding + 2 weeks of debugging. CodeStrain knows the difference.

Join the Waitlist View on GitHub
AI makes experienced developers slower
19%
Researchers gave 246 real coding tasks to 16 senior open-source developers. Those using AI tools took 19% longer to finish - but believed they were 20% faster. You literally cannot tell when AI is hurting your productivity.
METR randomized controlled trial, 2025
The gap between feeling fast and being fast
43pt
Developers predicted AI would save them 24% of time. After using it, they still believed it saved 20%. The actual result was -19%. That's a 43-point gap between perception and reality. No amount of self-awareness fixes this - you need external measurement.
Same study: METR, arXiv:2507.09089
Most developers are already burned out
83%
In a survey by Haystack Analytics, 83% of software developers reported experiencing burnout. AI tools were supposed to help - but Google's DORA 2024 report found burnout rates haven't improved despite widespread AI adoption.
Haystack/Survation survey, 2021

Know your actual output

Three core metrics that turn vibe coding chaos into measurable, recoverable work.

Recovery Score

A 0-100 composite of coding strain, recovery, and readiness - like WHOOP but for your brain. Green means you're fresh. Red means step away from the keyboard.

strain 0-21

ETA Predictions

Phase-aware ML predictions. You estimate generation time. Our model learns your personal multipliers across planning, debugging, iteration, and integration.

6-phase model

Break Personas

Context-aware break nudges with personality. Drill Sergeant, Gentle Princess, Sarcastic AI. Pick the character that actually makes you stop coding at 3 AM.

5 personas

How it works

1

Install the menu bar app

macOS native. Watches your Claude Code sessions via JSONL logs. Zero configuration.

2

Code like you always do

CodeStrain runs silently in the background. No workflow changes. No extra clicks.

3

Get your recovery score

See how strained you are, how long the session will really take, and when to stop. All data stays on your Mac.

Install

brew install codestrain/tap/codestrain
pipx install codestrain
curl -fsSL codestrain.dev/install | sh

macOS & Linux · Python 3.9+ · View script · GitHub · Homebrew tap

Get early access

Free tier is fully local, no server needed. PRO adds ML predictions and encrypted cloud sync.

No spam. Unsubscribe anytime. Privacy Policy