Google Gemini Skills

What Are Google Gemini Skills?

Google Gemini Skills is an official catalog of SKILL.md-based capabilities for Gemini API development . Built on the Agent Skills open standard , it provides agents with up-to-date knowledge about Gemini APIs, SDKs, and best practices that post-date the model's training cutoff.

The core problem it solves: LLMs have fixed training knowledge, but APIs evolve constantly. Skills bridge that gap with on-demand context .

It's no longer Google's only skills play. In April 2026, at Cloud Next, Google announced an official skills repository — github.com/google/skills — with 13 skills covering Google Cloud products (BigQuery, Cloud Run, GKE, Firebase), Well-Architected pillars, and onboarding recipes, designed to work with Antigravity, Gemini CLI, and third-party agents .

How It Works

Gemini CLI Integration — and the Antigravity Transition

Gemini CLI sunsets for individual users on June 18, 2026; Google's Antigravity CLI is the successor and retains Agent Skills (alongside hooks, subagents, and extensions as plugins) . Migration moves skills from .gemini/skills/ to .agents/skills/ — the same SKILL.md folders work unchanged . In Antigravity 2.0, global skills live at ~/.agents/skills and can be scoped per product (editor vs CLI) .

Until the cutover, Gemini CLI discovers skills from three tiers :

1. Workspace skills — .gemini/skills/ or .agents/skills/ (committed to version control, shared with team)
2. User skills — ~/.gemini/skills/ or ~/.agents/skills/ (personal, available across all workspaces)
3. Extension skills — bundled within installed Gemini CLI extensions

Precedence flows top-down: workspace overrides user overrides extension. The agent autonomously decides when to activate a skill based on the request and skill description — only loading full instructions when relevant (progressive disclosure) .

Installation

Skills install via the standard npx skills CLI or Context7:

npx skills add google-gemini/gemini-skills --skill gemini-api-dev --global

Performance

Google published concrete benchmarks :

This is one of the few published before/after measurements in the skills ecosystem.

Current Catalog

The catalog has grown from one skill at launch to three as of June 2026 :

• gemini-api-dev — Best practices for building Gemini-powered apps, including SDK usage
• gemini-live-api-dev — Real-time bidirectional streaming with the Live API: WebSocket audio/video/text, voice activity detection, function calling, session management
• gemini-interactions-api — Building with the Interactions API: text generation, multi-turn chat, streaming, structured output, image generation, Deep Research agents

Google's separate official google/skills repo adds 13 more skills focused on Google Cloud products . Compare this to Anthropic's catalog with dozens of skills across multiple domains.

Strengths

• Measurable impact — Published accuracy benchmarks (87-96%) give concrete evidence that skills work, not just vibes
• Native CLI integration — Three-tier discovery with precedence rules is more structured than most implementations
• Open standard adoption — Uses agentskills.io format, so skills are portable across Cursor, Claude Code, OpenCode, and others
• Progressive disclosure — Only metadata loads initially; full instructions load on activation

Cautions

• Small catalog — Three skills is still thin; Anthropic's catalog remains far deeper, and Google's broader skill investment now flows to the separate google/skills repo
• Not officially supported — Repository disclaimer still says "not an officially supported Google product"
• Gemini-centric content — The skills teach Gemini API usage, so they're most useful for Gemini developers specifically
• Platform churn — Gemini CLI, the catalog's native host, stops serving individuals on June 18, 2026; skills survive the move to Antigravity CLI, but docs and paths are in flux

What Developers Say

Early reactions to Google's skills push are positive on measured impact, more pointed on provenance. Pawel, testing Google's 13-skill official repo with Gemini CLI, wrote: "The same model. Same prompt. Different universe." — but noted "The format itself wasn't invented by Google — it was built and open-sourced by Anthropic. Google adopting it as their official documentation delivery layer is the actual story."

Google's framing, via Senior Staff Developer Advocate Megan O'Keefe: skills are "a simple, open format for giving agents new capabilities and expertise" .

Competitive Positioning

All three now converge on the same open standard — the differentiation is catalog depth and platform-specific integration.

The Tembo Angle

Google joining the Agent Skills standard validates the emerging consensus: skills are becoming the standard unit of agent capability. For orchestration platforms like Tembo, this means skill-aware routing — choosing which agent handles a task based on available skills — becomes increasingly viable as catalogs grow across providers.

Bottom Line

Recommended for: Gemini API developers who want measurably better code generation — the skills carry over cleanly to Antigravity CLI after the June 18, 2026 Gemini CLI sunset.

Not recommended for: Anyone looking for a broad skills catalog — Anthropic's is far more comprehensive today, and even Google's own depth now lives in the separate google/skills repo.

Outlook: Google has doubled down on the SKILL.md standard: a tripled gemini-skills catalog, an official 13-skill google/skills repo from Cloud Next 2026, and Agent Skills carried forward as a headline feature of Antigravity CLI and Antigravity 2.0. The convergence story — Google, Anthropic, OpenAI, and Cursor on one open format — has only strengthened; watch whether the Gemini-specific catalog folds into google/skills.