# turbo-transforms

Writes and debugs transforms for Turbo pipelines: EVM log decoding, filters, TypeScript scripts, dynamic lookup tables.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 3600 installs · ★ 12
- Author: goldsky-io
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/goldsky-io/goldsky-agent/tree/HEAD/skills/turbo-transforms/SKILL.md
- Updated: 2026-10-22
- HTML: https://affpapa.org/en/nevibecode/skills/turbo-transforms

## What it does

The skill sorts the request by intent first — decode, filter, reshape, combine events, add custom logic, or do a lookup join — then points to the matching section with SQL and YAML templates.

Reference files cover the specialised cases: `references/evm-patterns.md` for advanced EVM patterns, `references/typescript-transforms.md` for script and handler transforms, `references/dynamic-tables.md` for allowlists and lookup joins, `references/solana-patterns.md` for Solana instruction and log decoding. Core functions include `evm_log_decode()` with its aliases `_gs_log_decode` and `evm_decode_log`, plus `fetch_abi()`, `_gs_keccak256()`, `dynamic_table_check()` and `to_u256()`. One warning is worth reading before you write a query: Turbo SQL runs in streaming mode on Apache DataFusion, so joins, aggregations, window functions and subqueries are out. Use `dynamic_table` transforms for joins and the `postgres_aggregate` sink for aggregations.

When the skill produces a full pipeline YAML rather than a snippet, it tells you to run `goldsky turbo validate` before handing the config over. Pipeline YAML structure lives in a separate skill, `/turbo-pipelines`; end-to-end pipeline building is `/turbo-builder`.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add goldsky-io/goldsky-agent --skill turbo-transforms -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/turbo-transforms/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/turbo-transforms/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add goldsky-io/goldsky-agent --skill turbo-transforms -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/turbo-transforms/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add goldsky-io/goldsky-agent --skill turbo-transforms -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/turbo-transforms/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install goldsky-io/goldsky-agent turbo-transforms
```

2. **Manually: put the files in place**
- File: `.github/skills/turbo-transforms/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add goldsky-io/goldsky-agent --skill turbo-transforms -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/goldsky-io/goldsky-agent --path skills/turbo-transforms
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/turbo-transforms/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add goldsky-io/goldsky-agent --skill turbo-transforms -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/goldsky-io/goldsky-agent/tree/HEAD/skills/turbo-transforms/SKILL.md

## When to use it
- decode Transfer events from raw EVM logs
- filter transfers by contract address
- merge several event types into one stream with UNION ALL
- write a TypeScript transform that invokes a function
- pull values from a dynamic lookup table

## Example prompts
- Decode Transfer events from my raw logs source and keep only USDC transfers
- Write a SQL transform that filters by contract address and scales the amount to 18 decimals
- Build a TypeScript transform for my Turbo pipeline and check it with goldsky turbo validate

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 2a2f83cd0325ff13.

BEGIN THIRD-PARTY FILE 2a2f83cd0325ff13
````text
---
name: turbo-transforms
description: "Write SQL, TypeScript, and dynamic table transforms for Turbo pipelines. Covers: decoding EVM logs with _gs_log_decode, filtering/casting blockchain data, UNION ALL for combining events, TypeScript/WASM transforms (invoke function), dynamic lookup tables (dynamic_table_check), transform chaining, and Solana decoding. Triggers on: 'decode Transfer events', 'write a SQL transform', 'filter by contract', 'TypeScript transform', 'dynamic table', 'UNION ALL'. For pipeline YAML structure, use /turbo-pipelines. For end-to-end building, use /turbo-builder."
---

# Turbo Transforms

Write, understand, and debug SQL, TypeScript, and dynamic table transforms for Turbo pipeline configurations.

Identify what the user needs (decode, filter, reshape, combine, custom logic, or lookup joins), then use the relevant section below. If generating a complete pipeline YAML (not just a transform snippet), always validate with `goldsky turbo validate` before presenting it to the user.

**Reference files for specialized topics:**
- `references/evm-patterns.md` — Advanced EVM patterns (decode-once-filter-many, UNION ALL, schema normalization)
- `references/typescript-transforms.md` — TypeScript/WASM script transforms and handler transforms
- `references/dynamic-tables.md` — Dynamic table transforms (allowlists, lookup joins)
- `references/solana-patterns.md` — Solana instruction/log decoding and function examples

---

## Transform Basics

### YAML Structure

```yaml
transforms:
  my_transform:
    type: sql
    primary_key: id
    sql: |
      SELECT id, block_number, address
      FROM my_source
      WHERE address = '0xabc...'
```

### Required Fields

| Field         | Required | Description                                                  |
| ------------- | -------- | ------------------------------------------------------------ |
| `type`        | Yes      | `sql`, `script`, `handler`, `dynamic_table`, or `throttle`   |
| `primary_key` | Yes\*    | Column used for uniqueness and ordering (\*not for `throttle`) |
| `sql`         | Yes      | SQL query (for `sql` type transforms)                        |

### Referencing Data

- Reference **sources** by their YAML key name: `FROM my_source`
- Reference **other transforms** by their YAML key name: `FROM my_transform`
- No need for a `from` field in SQL transforms — the `FROM` clause in SQL handles it

### SQL Streaming Limitations
````
END THIRD-PARTY FILE 2a2f83cd0325ff13

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First 2452 of 12720 bytes. © goldsky-io · MIT · https://github.com/goldsky-io/goldsky-agent/tree/HEAD/skills/turbo-transforms/SKILL.md

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