redplanetlabs/specter

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

2622 stars · 105 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

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

library · maturity stable

serialization developer-tools programming-languages data-science jvm jvm-scripting clojure clojurescript immutable-data data-transformation navigators functional-programming algorithms

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