# redplanetlabs/specter

Clojure(Script)'s missing piece

Repository: https://github.com/redplanetlabs/specter
Canonical: https://ross.abutalabs.com/products/specter
Language: Clojure
License: Apache-2.0
License Family: permissive
Last push: 2025-09-30T05:13:29+00:00

## Health v2 (maintenance only)
Score: 52/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 44, release rhythm 35, longevity 100
- inputs: {"age_days": 4206, "days_push": 337, "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 2622, forks 105 (observed 2026-08-28T04:07:05.114022+00:00)

## What it is
Specter is a Clojure/ClojureScript library for querying and transforming immutable nested and recursive data structures via composable 'navigators'. It delivers performance rivaling hand-optimized code while expressing complex manipulations concisely.

## Use cases
- transform nested maps and vectors in Clojure
- query deeply nested immutable data structures
- update specific elements inside recursive data
- replace verbose get-in/update-in code with concise paths
- prepend or insert into Clojure vectors and sequences
- map functions over all values in a collection while preserving types

## When to choose
- you work heavily with nested or recursive immutable data in Clojure
- you need faster alternatives to get-in and update-in
- you want precise, type-preserving transformations of data structures
- vanilla Clojure data manipulation code is becoming verbose and hard to maintain

## When to avoid
- your project is not in Clojure or ClojureScript
- you only do simple flat data access that core Clojure handles fine
- your team is unwilling to learn the navigator/path abstraction

## Facets
- artifact type: library
- maturity: stable
- function: serialization, developer-tools
- domain: programming-languages, data-science
- platform: jvm, jvm-scripting
- tags: clojure, clojurescript, immutable-data, data-transformation, navigators, functional-programming, algorithms

## Member repositories
- redplanetlabs/specter (main) score 52

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:05.114022+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 2026-08-30T02:20:03.035058+00:00, confidence not recorded.
  - readme: https://github.com/redplanetlabs/specter (fetched 2026-08-28T04:07:05.114022+00:00, sha 2829fe4cde7e)
- Data as of 2026-08-30T08:39:29.467469+00:00.