---
title: "Evolving Spec-Driven Development: Conductor Now Supports Antigravity"
description: "Conductor, introduced as a Gemini CLI extension for spec-driven development (SDD), is evolving into a plugin that supports Antigravity CLI and other tools. The change moves project awareness from ephemeral chat logs into persistent, version-controlled Markdown artifacts while replacing strict command sequences with conversational creation and iteration of context, specs, and plans. Plugins package skills, rules, MCP servers, and hooks, and the Conductor Plugin can update project context and mark plan tasks complete as discussions progress, while preserving existing commands, specs, plans, shared configuration, and development tracks. The post reports a higher success rate on the most complex subset of TerminalBench tasks than a user not using SDD, and gives an Antigravity installation command: agy plugins install https://github.com/gemini-cli-extensions/conductor."
---

# Evolving Spec-Driven Development: Conductor Now Supports Antigravity

[Google](https://yomu.fyi/company/google) · Mahima Shanware, Sherzat Aitbayev, Jay Kornder · Jul 16, 2026

**Type:** Announcement

## Summary

Conductor, introduced as a Gemini CLI extension for spec-driven development (SDD), is evolving into a plugin that supports Antigravity CLI and other tools. The change moves project awareness from ephemeral chat logs into persistent, version-controlled Markdown artifacts while replacing strict command sequences with conversational creation and iteration of context, specs, and plans. Plugins package skills, rules, MCP servers, and hooks, and the Conductor Plugin can update project context and mark plan tasks complete as discussions progress, while preserving existing commands, specs, plans, shared configuration, and development tracks. The post reports a higher success rate on the most complex subset of TerminalBench tasks than a user not using SDD, and gives an Antigravity installation command: agy plugins install https://github.com/gemini-cli-extensions/conductor.

## Context

Conductor was introduced to bring spec-driven development into the terminal by moving project awareness from ephemeral chat logs into persistent, version-controlled Markdown files. The plugin transition addresses the previous tie to Gemini CLI and enables the workflow to support multiple tools while preserving project context.

## Approach / What changed

Conductor is packaged as a plugin containing skills, rules, MCP servers, and hooks. It replaces strict command sequences with conversational generation and iteration of context, specs, and plans, while retaining persistent Markdown artifacts, backward compatibility with existing commands, and shared configuration across tools.

## Takeaways

- The Conductor Plugin preserves spec.md, plan.md, existing plans and specs, shared configuration, and development tracks across supported tools.
- Conductor can be installed for Antigravity CLI with agy plugins install https://github.com/gemini-cli-extensions/conductor.
- The plugin achieved a higher success rate on the most complex subset of TerminalBench tasks than a user not using SDD.

**Tags:** [Architecture](https://yomu.fyi/topic/architecture), [Markdown](https://yomu.fyi/topic/markdown), [MCP](https://yomu.fyi/topic/mcp)

- Source: [Google](https://developers.googleblog.com/evolving-spec-driven-development-conductor-now-supports-antigravity)
- Source URL: https://developers.googleblog.com/evolving-spec-driven-development-conductor-now-supports-antigravity
- Ingested by Yomu: 2026-09-09T14:28:46.561Z

[Read original post](https://developers.googleblog.com/evolving-spec-driven-development-conductor-now-supports-antigravity)