Add support for JSON Schema Coercion

Description

(require '[reitit.coercion.json-schema])

["/api"
 {:coercion reitit.coercion.json-schema/coercion}

 ["/order"
  {:post
   {:parameters
    {:body
     {:title "Order"
      :properties {:petId {:format "int64"
                           :type "integer"},
                   :status {:description "Order Status"
                            :enum ["placed" "approved" "delivered"]
                            :type "string"},
                   :id {:format "int64"
                        :type "integer"},
                   :shipDate {:format "date-time"
                              :type "string"},
                   :complete {:default false
                              :type "boolean"},
                   :quantity {:format "int32"
                              :type "integer"}},
      :type "object",
      :xml {:name "Order"}}}
    :handler (fn [req]
               {:status 200
                :body {:id (-> req :parameters :body :petId)}})}}]]

Contributor guide

Tech stack

None

Domain

backend

Issue type

feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-2 days

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

Clojure basicsreitit libraryJSON Schema understanding

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

45

Research direction

Examine existing coercion implementations in reitit, such as reitit.coercion.schema, to understand the required structure. Create a new module reitit.coercion.json schema following the same pattern. Test with examples similar to the issue's sample code. Since no comments or PRs exist, focus on the provided description.