He says nothing. He writes one line. It works.
You know him. Long ponytail. Oval glasses. Has been at the company longer than the version control. You show him fifty lines; he looks at them, says nothing, and replaces them with one.
Ponytail puts him inside Antigravity IDE (Google DeepMind's agentic coding assistant).
You ask for a date picker. Your agent installs flatpickr, writes a wrapper component, adds a stylesheet, and starts a discussion about timezones.
With ponytail:
<!-- ponytail: browser has one -->
<input type="date">Before writing code, the agent stops at the first rung that holds:
1. Does this need to exist? → no: skip it (YAGNI)
2. Already in this codebase? → reuse it, don't rewrite
3. Stdlib does it? → use it
4. Native platform feature? → use it
5. Installed dependency? → use it
6. One line? → one line
7. Only then: the minimum that works
The ladder runs after it understands the problem, not instead of it: it reads the code the change touches and traces the real flow before picking a rung. Lazy about the solution, never about reading.
Lazy, not negligent: trust-boundary validation, data-loss handling, security, and accessibility are never on the chopping block.
To apply Ponytail rules across all projects, copy AGENTS.md into your Global Customizations Root:
- Windows:
C:\Users\<username>\.gemini\config\AGENTS.md - macOS/Linux:
~/.gemini/config/AGENTS.md
To use Ponytail in a specific workspace:
- Place
AGENTS.mdin the project root. - Or copy
skills/into.agents/skills/within your workspace.
Antigravity auto-detects gemini-extension.json and loads AGENTS.md for session rules alongside auto-discovering skills in skills/.
| Skill | Description |
|---|---|
| ponytail | Lazy senior dev mode: simplest solution that works. |
| ponytail-review | Over-engineering code review: finds unnecessary complexity. |
| ponytail-audit | Repo-wide over-engineering audit: ranked list of what to delete. |
| ponytail-debt | Harvest ponytail: shortcut comments into a tracked ledger. |
| ponytail-gain | Measured-impact scoreboard (less code, less cost, more speed). |
| ponytail-help | Quick reference for all ponytail skills. |
To verify rule copies and version consistency:
node scripts/check-rule-copies.js
node scripts/check-versions.js
npm testMIT. The shortest license that works.