type-adapter

A shared conversion rule for turning a Java type into JSON or a Sankhya value, and turning it back again. JSON is a common text format for exchanging structured data between applications.

In plain words
What is it for?
Use it to create, review, or standardise conversions for dates, custom value objects, wrapper types, and other domain-specific Java types across JSON, Java objects, and Jape values.
Why use it?
It removes repeated conversion code when the SDK does not support a type, when a type needs a special format, or when the default conversion must be replaced. The rule can apply throughout the add-on.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/snk-devcenter/addon-studio/type-adapter
Any agent
npx skills add snk-devcenter/addon-studio --skill type-adapter
Clone the repo
git clone --depth 1 https://github.com/snk-devcenter/addon-studio

Made for: Claude Code, Codex.

Per session 150 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,677 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00150 $0.02677
Opus 5 $0.00075 $0.01339
Sonnet 5 $0.00030 $0.00535
Haiku 4.5 $0.00015 $0.00268

Measured 2d ago against content hash 797aa6ccd6bb, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

type-adapter scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/addon-studio/skills/type-adapter/SKILL.md · 228 lines

How it starts

The opening of the file, as written. The whole thing — 228 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Adaptadores de Tipo (@GlobalTypeAdapter) — Addon Studio 2.0

@GlobalTypeAdapter registra adaptadores customizados no SDK para converter tipos entre JSON, objetos Java e valores Jape (camada de persistencia). Aplicado automaticamente em todo marshal/unmarshal de DTOs.


1. Quando criar um adaptador global

Use @GlobalTypeAdapter quando o tipo nao possui suporte nativo no SDK nem no Gson, ou quando o comportamento nativo precisa ser sobrescrito.

Casos de uso comuns:

Situacao Exemplo
Tipo java.time.* nao coberto pelos nativos ZonedDateTime, YearMonth
Conversao customizada JSON ↔ Java Formato de data proprietario
Sobrescrever adaptador nativo do SDK BooleanAdapter com logica diferente
Tipo de dominio especifico do addon Value Objects, tipos wrapper

Precedencia: global > nativo. Adaptador global sobrescreve o nativo equivalente.


2. Interfaces disponíveis

Classe anotada com @GlobalTypeAdapter pode implementar uma ou mais:

Interface Responsabilidade
TypeAdapter<T> Converte o tipo entre objeto Java e valor Jape (banco/VO)
JsonSerializer<T> Define como o tipo e convertido para JSON
JsonDeserializer<T> Define como o tipo e convertido a partir de JSON

Implemente somente as interfaces necessarias para o caso de uso.


3. Anatomia de um @GlobalTypeAdapter

import br.com.sankhya.studio.adapters.TypeAdapter;
import br.com.sankhya.studio.stereotypes.GlobalTypeAdapter;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import java.lang.reflect.Type;

@GlobalTypeAdapter
public class MeuTipoAdapter
        implements TypeAdapter<MeuTipo>, JsonSerializer<MeuTipo>, JsonDeserializer<MeuTipo> {

    // TypeAdapter<T> — conversao Java ↔ Jape (banco)
    @Override
    public MeuTipo fromVO(Object o) {
        if (o == null) return null;
        // converter valor do banco -> MeuTipo
    }

    @Override
    public Object toVO(MeuTipo value) {
        if (value == null) return null;
        // converter MeuTipo -> valor para banco
    }

    @Override
    public void setType(Class<? extends MeuTipo> aClass) {}  // geralmente vazio

    // JsonSerializer<T> — conversao Java -> JSON
    @Override
    public JsonElement serialize(MeuTipo value, Type type, JsonSerializationContext ctx) {
        return new JsonPrimitive(value.toString());
    }

    // JsonDeserializer<T> — conversao JSON -> Java
    @Override
    public MeuTipo deserialize(JsonElement el, Type type, JsonDeserializationContext ctx)
            throws JsonParseException {
        try {
            return MeuTipo.parse(el.getAsString());
        } catch (Exception e) {
            throw new JsonParseException("Erro ao desserializar MeuTipo: " + el, e);
        }
    }
}

Read the full file on GitHub · 228 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 228 lines · 150 tokens per session scan A 797aa6ccd6bb

Subscribe to this mod's changes

type-adapter is a skill published in the GitHub repository snk-devcenter/addon-studio (5 stars, last pushed 2d ago), licensed MIT. It adds 150 tokens to every session and 2,677 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

Other skills, from other repositories

airflow-java-sdk

Guide for contributing to the Airflow Java SDK (AIP-108). Use this skill whenever a contributor is working in the java-sdk/ directory or on the Java coordinator in task-sdk/src/airflow/sdk/coordinators/java/ — whether they want to add a feature, write tests, fix a bug, understand the architecture, or prepare a PR.…

apache/airflow · 119 tokens

jni-type-conversion

How to use @JniType annotations for ergonomic JNI. Relevant for Java files that use @NativeMethods or @CalledByNative.

chromium/chromium · 32 tokens

wxjava-module-selector

根据微信公众号、小程序、微信支付、企业微信、开放平台、视频号或微信小店、腾讯企点和微信智能对话等业务场景,为用户选择合适的 WxJava Maven 模块、BOM 和示例入口。适用于用户询问“该用哪个模块”、依赖坐标、产品边界或单/多账号 Starter 选择时。.

binarywang/WxJava · 86 tokens

azure-ai-formrecognizer-java

Azure AI Document Intelligence SDK for Java (com.azure:azure-ai-documentintelligence). Use for extracting text, tables, key-value pairs from documents, receipts, invoices, IDs, or building custom document models. Triggers: "document intelligence java", "form recognizer java", "extract text from PDF java", "OCR…

microsoft/skills · 92 tokens

azure-ai-anomalydetector-java

Build anomaly detection applications with Azure AI Anomaly Detector SDK for Java. Use when implementing univariate/multivariate anomaly detection, time-series analysis, or AI-powered monitoring.

microsoft/skills · 43 tokens

azure-communication-chat-java

Build real-time chat applications with Azure Communication Services Chat Java SDK. Use when implementing chat threads, messaging, participants, read receipts, typing notifications, or real-time chat features.

microsoft/skills · 41 tokens