whydunit is an open-source project built for developers.

Yes — whydunit is open source under the MIT license and free to use.

What platforms does whydunit run on?

whydunit runs on the command line. It can also be self-hosted.

Is whydunit still active?

The GitHub repository shows 38 commits in the last 90 days.

What are alternatives to whydunit?

Similar projects tracked by PulseGate include Track Debug, ZenPress, and StarPulse.

Who develops whydunit?

whydunit is developed by alex-hahn.

When did whydunit launch?

whydunit first shipped in 2026.

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whydunit

Name: whydunit
Author: alex-hahn

PyPIInfrastructure

whydunit is an open-source Python library that helps developers diagnose failures in LLM and RAG pipelines. It uses counterfactual replay techniques to systematically test variations of the pipeline and pinpoint the exact cause of errors, replacing manual guesswork with reproducible analysis. It is aimed at AI engineers and data scientists building reliable LLM applications.

Open SourceMITCLISelf-hosted

Visit PyPI

Overview

4 features

whydunit sits in PulseGate's Developer Tools category. It focuses on debugging and understanding why an LLM or RAG pipeline failed without relying on guesswork. whydunit is an open-source project aimed at developers. whydunit is open source under the MIT license. It runs on the command line, and it can be self-hosted.

alex-hahn builds and maintains whydunit, and it first shipped in 2026. The project is developed in the open on GitHub with 38 commits in the last 90 days. Among its 4 catalogued features are counterfactual replay, root cause analysis, and LLM debugging.

Summary written by a language model from the project’s public pages.

Counterfactual replay
Root cause analysis
LLM debugging
Pipeline evaluation

Built with & integrations

Runs on

CLISelf-hosted

Trust & compliance

License

MIT

Verified signals

HTTPSOpen Source GitHubActive maintenance

Indexing history

What PulseGate has recorded for this listing

Indexed27 Jul · 23:05 UTC
whydunit verified against its public source
Source: PulseGate · Open

Frequently asked questions about whydunit

What does whydunit do?: Whydunit focuses on debugging and understanding why an LLM or RAG pipeline failed without relying on guesswork. It is catalogued under Developer Tools on PulseGate.
Who is whydunit for?: whydunit is an open-source project built for developers.
Is whydunit free?: Yes — whydunit is open source under the MIT license and free to use.
What platforms does whydunit run on?: whydunit runs on the command line. It can also be self-hosted.
Is whydunit still active?: The GitHub repository shows 38 commits in the last 90 days.
What are alternatives to whydunit?: Similar projects tracked by PulseGate include Track Debug, ZenPress, and StarPulse.Track Debug ZenPress StarPulse
Who develops whydunit?: whydunit is developed by alex-hahn.
When did whydunit launch?: whydunit first shipped in 2026.

At a glance

Platforms: Cli
Languages: English
Open source: Yes (GitHub)
License: MIT
First seen: 27 Jul 2026
Built for: developers
Model: Open source
Solves: Debugging and understanding why an LLM or RAG pipeline failed without relying on guesswork.

Registered as

GitHub: alex-hahn/whydunit
PyPI: whydunit

Developer

alex-hahn

Solo developer

GitHub

Open source

View on GitHub

Stars: 0
Forks: 0
Open issues: 0
Last commit: 27 Jul 2026
Commits 90d: 38
Contributors: 1
Authorship: Solo
Default branch: main
Latest release: v0.1.1 · 27 Jul 2026

Live coverage

Identity confidence: Low · 64
Indexed: 27 Jul 2026
Lifecycle: Alive
First seen: Jul 2026
Last seen: 27 Jul 2026

Identity audit (13)

Slug: whydunit-pypi-org
Lifecycle state recorded: 27 Jul 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 27 Jul 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model from page content.
Last updated: 27 Jul 2026
Canonical URL: https://pypi.org/project/whydunit

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