# pmjones/adr

Action-Domain-Responder: a web-specific alternative to Model-View-Controller.

Repository: https://github.com/pmjones/adr
Canonical: https://ross.abutalabs.com/products/pmjones-adr
Homepage: http://pmjones.io/adr
Language: HTML
License Family: other
Last push: 2022-02-28T16:23:43+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4502, "days_push": 1647, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1137, forks 64 (observed 2026-08-28T04:03:43.806113+00:00)

## What it is
Action-Domain-Responder (ADR) is a documentation project describing a web-specific architectural pattern that refines Model-View-Controller for HTTP interactions, splitting them into Action, Domain, and Responder roles. It provides explanatory essays, comparisons to Model 2 MVC, tradeoff analyses, and refactoring guidance rather than runnable code.

## Use cases
- understand the ADR pattern as an alternative to MVC
- learn how to structure HTTP request handling into action, domain, and responder
- refactor a Model 2 MVC codebase to ADR
- compare tradeoffs between MVC and ADR before choosing an architecture
- find implementations and discussions of the ADR pattern
- teach web architecture patterns to a team

## When to choose
- you are designing a server-side web application and want a clearer separation of HTTP presentation logic from domain logic than MVC offers
- you need written guidance and rationale for restructuring an MVC framework's controllers
- you want a well-documented, citation-backed pattern reference

## When to avoid
- you need a runnable library or framework code, not pattern documentation
- you are building single-page apps or client-heavy frontends where server-side MVC/ADR patterns matter less
- your team is already committed to an MVC framework and has no need to change architecture

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: documentation, web-framework
- domain: web-development, backend, tutorials, documentation
- platform: cross-platform
- tags: adr, action-domain-responder, mvc-alternative, architecture-pattern, design-pattern, http, refactoring, web-server

## Member repositories
- pmjones/adr (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:43.806113+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 2026-08-30T06:36:20.976876+00:00, confidence not recorded.
  - readme: https://github.com/pmjones/adr (fetched 2026-08-28T04:03:43.806113+00:00, sha 8adeb77617d0)
  - homepage: http://pmjones.io/adr (fetched 2026-08-29T12:41:20.149554+00:00, sha d7be468b4940)
- Data as of 2026-08-30T08:39:29.467469+00:00.