# brynary/rack-bug

Debugging toolbar for Rack applications implemented as middleware

Repository: https://github.com/brynary/rack-bug
Canonical: https://ross.abutalabs.com/products/rack-bug
Language: Ruby
License: MIT
License Family: permissive
Last push: 2016-04-27T20:46:14+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 6387, "days_push": 3780, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1073, forks 102 (observed 2026-08-28T04:03:28.731642+00:00)

## What it is
Rack::Bug is a debugging toolbar for Rack applications, implemented as Rack middleware. It injects a floating diagnostics panel into your app showing logging, SQL queries, template rendering times, cache usage, memory, and request variables.

## Use cases
- inspect SQL queries in a Rails app during development
- profile template rendering and request timing in a Rack app
- debug cache and Redis usage from a browser toolbar
- add custom diagnostic panels to a Sinatra app
- securely enable a debug toolbar in staging with IP or password restrictions

## When to avoid
- starting a new Rails project - use maintained alternatives like Rails panel gems or newer profilers
- you need actively maintained tooling or modern Ruby/Rails compatibility

## Facets
- artifact type: library
- maturity: abandoned
- function: middleware, monitoring, logging, tracing
- domain: web-development, backend, developer-tools
- platform: ruby
- tags: rack, debug-toolbar, rails, sinatra, diagnostics, debugging, web-server

## Member repositories
- brynary/rack-bug (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:28.731642+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:53:35.802336+00:00, confidence not recorded.
  - readme: https://github.com/brynary/rack-bug (fetched 2026-08-28T04:03:28.731642+00:00, sha e5ff850ffafd)
- Data as of 2026-08-30T08:39:29.467469+00:00.