opencode-implementer

name	opencode-implementer
description	Executes code implementation using OpenCode CLI based on specifications.
command-dispatch	tool
command-tool	opencode

OpenCode Implementer

Overview

This skill executes code implementation using OpenCode CLI after specifications are created.

When to Use

After running specification-engine and having a SPEC.md, use this skill to implement features.

Two Modes

Mode 1: One-shot implementation

Use the opencode tool for single tasks:

opencode({
  instruction: "Create a React counter component",
  directory: "/path/to/project",
});

Mode 2: Interactive TUI

For complex implementations, interact with OpenCode directly:

// Just type "opencode" - no tool needed
// This opens an interactive terminal where you can:
// - Use slash commands: /speckit.specify, /speckit.plan, etc.
// - Run multiple operations
// - Iterate on the implementation

Execution Flow

1. Read SPEC.md to understand requirements
2. Plan implementation based on spec
3. Execute using opencode tool or TUI
4. Verify implementation matches SPEC.md

Example Workflow

1. opencode tool: Create new feature
2. Or type: opencode (for interactive mode)
3. Inside TUI: /speckit.specify → make changes → /speckit.implement

Parameters (for tool mode)

Parameter	Type	Description
instruction	string	What to implement
directory	string	Target project directory
model	string	Optional model override

Guardrails

• FORBIDDEN tools: write, edit
• ONLY use: opencode CLI
• Must have SPEC.md before implementing

Composability

• Required with: specification-engine
• Runs after specification is complete