# Kotlin/KEEP

Kotlin Evolution and Enhancement Process

Repository: https://github.com/Kotlin/KEEP
Canonical: https://ross.abutalabs.com/products/kotlin-keep
Homepage: https://kotlinlang.org/docs/kotlin-language-features-and-proposals.html
Language: Markdown
License: Apache-2.0
License Family: permissive
Topics: evolution, kotlin, language
Last push: 2026-08-25T16:45:01+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 3817, "days_push": 8, "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 3758, forks 384 (observed 2026-08-28T04:08:17.851787+00:00)

## What it is
KEEP is the official Kotlin Evolution and Enhancement Process repository, hosting design proposals, draft notes, and discussions for new Kotlin language and standard library features. It documents the lifecycle of each proposal from publication through public review to acceptance or rejection.

## Use cases
- track upcoming Kotlin language features
- read design proposals for Kotlin stdlib changes
- participate in public review of Kotlin proposals
- check the status of a specific Kotlin feature
- understand how Kotlin evolves the language

## When to choose
- you want to follow or give feedback on future Kotlin language design
- you need authoritative documentation on experimental Kotlin features
- you are a library author planning around upcoming Kotlin changes

## When to avoid
- you need the Kotlin compiler or runtime implementation itself
- you want stable, finished API documentation rather than in-progress designs

## Facets
- artifact type: learning-resource
- maturity: active
- function: documentation, programming-language
- domain: programming-languages, documentation, developer-tools
- platform: jvm, cross-platform
- tags: kotlin, language-design, proposals, keep, jetbrains, specification

## Member repositories
- Kotlin/KEEP (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:17.851787+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 2026-08-29T18:28:55.362883+00:00, confidence not recorded.
  - readme: https://github.com/Kotlin/KEEP (fetched 2026-08-28T04:08:17.851787+00:00, sha 3f35237a662b)
  - homepage: https://kotlinlang.org/docs/kotlin-language-features-and-proposals.html (fetched 2026-08-29T09:22:57.641865+00:00, sha 1cf29b177aba)
  - site_page: https://kotlinlang.org/docs/components-stability.html (fetched 2026-08-29T09:22:57.653736+00:00, sha b35695c760b1)
  - site_page: https://kotlinlang.org/docs/roadmap.html (fetched 2026-08-29T09:22:57.655744+00:00, sha 6d9a8e720d63)
  - site_page: https://kotlinlang.org/docs/kotlin-evolution-principles.html (fetched 2026-08-29T09:22:57.651076+00:00, sha 39d9d9596b39)
- Data as of 2026-08-30T08:39:29.467469+00:00.