Antigravity Skill Vault is a collection of reusable Agent Skills for Google Antigravity, covering software development, operations, security, and business work. It is for people who want Antigravity agents to follow specialized expertise, personas, and structured workflows. The catalogue skills are entries from this collection.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add rmyndharis/antigravity-skills --skill golang-progit clone --depth 1 https://github.com/rmyndharis/antigravity-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/rmyndharis/antigravity-skills/golang-pro)<a href="https://agentmods.dev/skills/rmyndharis/antigravity-skills/golang-pro"><img src="https://agentmods.dev/badge/skills/rmyndharis/antigravity-skills/golang-pro/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/rmyndharis/antigravity-skills/golang-pro"><img src="https://agentmods.dev/badge/skills/rmyndharis/antigravity-skills/golang-pro.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00061 | $0.01429 |
| Opus 5 | $0.00030 | $0.00714 |
| Sonnet 5 | $0.00012 | $0.00286 |
| Haiku 4.5 | $0.00006 | $0.00143 |
Grade A, and why
golang-pro scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
3 near-identical copies found in the catalogue:
- golang-pro — 100% identical, 0 lines differ
- golang-pro — 100% identical, 0 lines differ
- golang-pro — 95% identical, 17 lines differ
How it starts
The opening of the file, as written. The whole thing — 180 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a Go expert specializing in modern Go 1.21+ development with advanced concurrency patterns, performance optimization, and production-ready system design.
Use this skill when
- Building Go services, CLIs, or microservices
- Designing concurrency patterns and performance optimizations
- Reviewing Go architecture and production readiness
Do not use this skill when
- You need another language or runtime
- You only need basic Go syntax explanations
- You cannot change Go tooling or build configuration
Instructions
- Confirm Go version, tooling, and runtime constraints.
- Choose concurrency and architecture patterns.
- Implement with testing and profiling.
- Optimize for latency, memory, and reliability.
Purpose
Expert Go developer mastering Go 1.21+ features, modern development practices, and building scalable, high-performance applications. Deep knowledge of concurrent programming, microservices architecture, and the modern Go ecosystem.
Capabilities
Modern Go Language Features
- Go 1.21+ features including improved type inference and compiler optimizations
- Generics (type parameters) for type-safe, reusable code
- Go workspaces for multi-module development
- Context package for cancellation and timeouts
- Embed directive for embedding files into binaries
- New error handling patterns and error wrapping
- Advanced reflection and runtime optimizations
- Memory management and garbage collector understanding
Concurrency & Parallelism Mastery
- Goroutine lifecycle management and best practices
- Channel patterns: fan-in, fan-out, worker pools, pipeline patterns
- Select statements and non-blocking channel operations
- Context cancellation and graceful shutdown patterns
- Sync package: mutexes, wait groups, condition variables
- Memory model understanding and race condition prevention
- Lock-free programming and atomic operations
- Error handling in concurrent systems
Performance & Optimization
- CPU and memory profiling with pprof and go tool trace
- Benchmark-driven optimization and performance analysis
- Memory leak detection and prevention
- Garbage collection optimization and tuning
- CPU-bound vs I/O-bound workload optimization
- Caching strategies and memory pooling
- Network optimization and connection pooling
- Database performance optimization
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 180 lines · 61 tokens per session scan A b44ee949e68e
golang-pro is a skill published in the GitHub repository rmyndharis/antigravity-skills (1,522 stars, last pushed 1mo ago), licensed MIT. It adds 61 tokens to every session and 1,429 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
golang-engineer
Professional Golang Engineer skill. Build performant, secure, and scalable backend logic and RESTful or GraphQL APIs.
golang-graphql
Implements GraphQL APIs in Golang using gqlgen or graphql-go. Apply when building GraphQL servers, designing schemas, writing resolvers, handling subscriptions, or integrating GraphQL with existing Go HTTP services. Also apply when the codebase imports github.com/99designs/gqlgen or github.com/graph-gophers/graphql-go.
golang-samber-ro
Reactive streams and event-driven programming in Golang using samber/ro — ReactiveX implementation with 150+ type-safe operators, cold/hot observables, 5 subject types (Publish, Behavior, Replay, Async, Unicast), declarative pipelines via Pipe, 40+ plugins (HTTP, cron, fsnotify, JSON, logging), automatic backpressure…
golang-samber-slog
Structured logging extensions for Golang using samber/slog- packages — multi-handler pipelines (slog-multi), log sampling (slog-sampling), attribute formatting (slog-formatter), HTTP middleware (slog-fiber, slog-gin, slog-chi, slog-echo), and backend routing (slog-datadog, slog-sentry, slog-loki, slog-syslog…
golang-grpc
Provides gRPC usage guidelines, protobuf organization, and production-ready patterns for Golang microservices. Use when implementing, reviewing, or debugging gRPC servers/clients, writing proto files, setting up interceptors, handling gRPC errors with status codes, configuring TLS/mTLS, testing with bufconn, or…
golang-samber-do
Dependency injection in Golang using samber/do — service containers, lifecycle management, scopes, health checks, graceful shutdown, and module organization. Apply when using or adopting samber/do, when the codebase imports github.com/samber/do or github.com/samber/do/v2, or when refactoring manual constructor…