Claude-skill-registry east-node-io

I/O platform functions for the East language on Node.js. Use when writing East programs that need SQL databases (SQLite, PostgreSQL, MySQL), NoSQL databases (Redis, MongoDB), S3 storage, file transfers (FTP, SFTP), file format parsing (XLSX, XML), or compression (Gzip, Zip, Tar). Triggers for: (1) Writing East programs with @elaraai/east-node-io, (2) Database operations with SQL.SQLite, SQL.Postgres, SQL.MySQL, NoSQL.Redis, NoSQL.MongoDB, (3) Cloud storage with Storage.S3, (4) File transfers with Transfer.FTP, Transfer.SFTP, (5) Format parsing with Format.XLSX, Format.XML, (6) Compression with Compression.Gzip, Compression.Zip, Compression.Tar.

install

source · Clone the upstream repo

git clone https://github.com/majiayu000/claude-skill-registry

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/majiayu000/claude-skill-registry "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/data/east-node-io" ~/.claude/skills/majiayu000-claude-skill-registry-east-node-io && rm -rf "$T"

manifest: skills/data/east-node-io/SKILL.md

East Node IO

I/O platform functions for the East language on Node.js. Enables East programs to interact with databases, cloud storage, file transfers, and data formats.

Quick Start

import { East, StringType, NullType } from "@elaraai/east";
import { SQL, Storage } from "@elaraai/east-node-io";

const queryDatabase = East.function([StringType], NullType, ($, userId) => {
    const config = $.let({
        host: "localhost",
        port: 5432n,
        database: "myapp",
        user: "postgres",
        password: "secret",
        ssl: East.variant('none', null),
        maxConnections: East.variant('none', null),
    });

    const conn = $.let(SQL.Postgres.connect(config));
    $(SQL.Postgres.query(conn, "SELECT * FROM users WHERE id = $1", [East.variant("Integer", 42n)]));
    $(SQL.Postgres.close(conn));
});

// Compile with specific module Implementation
const compiled = East.compileAsync(queryDatabase.toIR(), SQL.Postgres.Implementation);
await compiled("user123");

Decision Tree: Which Module to Use

Task → What do you need?
    │
    ├─ SQL Database
    │   ├─ SQL.SQLite (embedded, placeholder: ?)
    │   │   └─ .connect(), .query(), .close()
    │   ├─ SQL.Postgres (placeholder: $1, $2, ...)
    │   │   └─ .connect(), .query(), .close()
    │   └─ SQL.MySQL (placeholder: ?)
    │       └─ .connect(), .query(), .close()
    │
    ├─ NoSQL Database
    │   ├─ NoSQL.Redis (key-value cache)
    │   │   └─ .connect(), .get(), .set(), .setex(), .del(), .close()
    │   └─ NoSQL.MongoDB (document store)
    │       └─ .connect(), .insertOne(), .findOne(), .find(), .updateOne(), .deleteOne(), .close()
    │
    ├─ Storage.S3 (S3-compatible object storage)
    │   └─ .putObject(), .getObject(), .deleteObject(), .headObject(), .listObjects(), .presignUrl()
    │
    ├─ Transfer (file transfers)
    │   ├─ Transfer.FTP
    │   │   └─ .connect(), .put(), .get(), .list(), .delete(), .close()
    │   └─ Transfer.SFTP
    │       └─ .connect(), .put(), .get(), .list(), .delete(), .close()
    │
    ├─ Format (file parsing)
    │   ├─ Format.XLSX (Excel spreadsheets)
    │   │   └─ .read(), .write(), .info()
    │   └─ Format.XML
    │       └─ .parse(), .serialize()
    │
    └─ Compression
        ├─ Compression.Gzip (single file)
        │   └─ .compress(), .decompress()
        ├─ Compression.Zip (archive)
        │   └─ .compress(), .decompress()
        └─ Compression.Tar (archive)
            └─ .create(), .extract()

Compiling East Programs

Use specific module implementations:

// Single module
const compiled = East.compileAsync(myFunction.toIR(), SQL.Postgres.Implementation);

// Multiple modules
const compiled = East.compileAsync(
    myFunction.toIR(),
    [...SQL.Postgres.Implementation, ...Storage.S3.Implementation]
);

Reference Documentation

API Reference - Complete function signatures, types, and arguments for all modules
Examples - Working code examples by use case

Available Modules

Module	Import	Purpose
SQL.SQLite	`import { SQL } from "@elaraai/east-node-io"`	SQLite database (placeholder: `?` )
SQL.Postgres	`import { SQL } from "@elaraai/east-node-io"`	PostgreSQL database (placeholder: `$1` , `$2` )
SQL.MySQL	`import { SQL } from "@elaraai/east-node-io"`	MySQL database (placeholder: `?` )
Storage.S3	`import { Storage } from "@elaraai/east-node-io"`	S3 and S3-compatible storage
Transfer.FTP	`import { Transfer } from "@elaraai/east-node-io"`	FTP file transfers
Transfer.SFTP	`import { Transfer } from "@elaraai/east-node-io"`	SFTP file transfers
NoSQL.Redis	`import { NoSQL } from "@elaraai/east-node-io"`	Redis key-value store
NoSQL.MongoDB	`import { NoSQL } from "@elaraai/east-node-io"`	MongoDB document database
Format.XLSX	`import { Format } from "@elaraai/east-node-io"`	Excel spreadsheet parsing
Format.XML	`import { Format } from "@elaraai/east-node-io"`	XML parsing and serialization
Compression.Gzip	`import { Compression } from "@elaraai/east-node-io"`	Gzip compression
Compression.Zip	`import { Compression } from "@elaraai/east-node-io"`	ZIP archive creation/extraction
Compression.Tar	`import { Compression } from "@elaraai/east-node-io"`	TAR archive creation/extraction

Accessing Types

import { SQL, Storage, NoSQL, Format } from "@elaraai/east-node-io";

// Access types via Module.SubModule.Types.TypeName
const postgresConfig = SQL.Postgres.Types.Config;
const sqlResult = SQL.Postgres.Types.Result;
const s3Config = Storage.S3.Types.Config;
const redisConfig = NoSQL.Redis.Types.Config;
const xlsxSheet = Format.XLSX.Types.Sheet;

Connection Pattern

All connection-based modules follow the same pattern:

// 1. Create config
const config = $.let({ /* connection options */ });

// 2. Connect
const conn = $.let(Module.connect(config));

// 3. Perform operations
$(Module.operation(conn, ...args));

// 4. Close connection
$(Module.close(conn));