twitter-archive/diffy
Find potential bugs in your services with Diffy observed · 2026-08-28
Health v2 · maintenance only
10/100
- Activity 0
- Release rhythm 35
- Longevity 100
Flags: no_releases archived
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4039
- days_rel: n/a
- days_push: 2254
- n_releases_24m: 0
Adoption not part of the score
3811 stars · 360 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Diffy is a proxy-based differential testing tool from Twitter that multicasts incoming requests to a candidate service and two known-good service instances, then compares responses to surface regressions. It filters out non-deterministic noise by measuring differences between two identical known-good instances.
Use cases
- find regressions in a new version of my service without writing tests
- compare responses between old and new service implementations side by side
- detect bugs in my API by diffing candidate and known-good instances
- filter out noisy non-deterministic fields when comparing service responses
- run automated differential testing against microservices
- validate a rewritten service behaves equivalently to the original
When to avoid
- the original repo is archived and unmaintained - use the community fork Opendiffy instead
- you need to test stateful services where side effects make response comparison unreliable
- you don't have the ability to run multiple instances of your service simultaneously
Facets
service · maturity abandoned
testing proxy middleware http-server testing developer-tools apis backend jvm self-hosted differential-testing regression-detection service-comparison scala twitter-archive mirror-testing docker
1 source
- readme: https://github.com/twitter-archive/diffy · fetched 2026-08-28 · 6135fc58e1cb
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| twitter-archive/diffy | main | 10 |
For agents
markdown · JSON · MCP: product_card(name="twitter-archive/diffy")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem