Browse 5,831 Fullstack & Backend Engineering — Agentic Skills

Creates interactive HTML playgrounds — self-contained single-file explorers that let users configure something visually through controls, see a live preview, and copy out a prompt. Use when the user asks to make a playground, explorer, or interactive tool for a topic.

This skill should be used when the user asks to "create a hook", "add a PreToolUse/PostToolUse/Stop hook", "validate tool use", "implement prompt-based hooks", "use ${ANTIGRAVITY_PLUGIN_ROOT}", "set up event-driven automation", "block dangerous commands", or mentions hook events (PreToolUse, PostToolUse, Stop, SubagentStop, SessionStart, SessionEnd, UserPromptSubmit, PreCompact, Notification). Provides comprehensive guidance for creating and implementing Google Antigravity plugin hooks

Comprehensive PR review using specialized agents

Eclipse JDT.LS language server for Java projects in Google Antigravity.

Commit, push, and open a PR

Manage Telegram channel access — approve pairings, edit allowlists, set DM/group policy. Use when the user asks to pair, approve someone, check who's allowed, or change policy for the Telegram channel.

Audit and improve AGENTS.md files in repositories. Use when user asks to check, audit, update, improve, or fix AGENTS.md files. Scans for all AGENTS.md files, evaluates quality against templates, outputs quality report, then makes targeted updates. Also use when the user mentions "AGENTS.md maintenance" or "project memory optimization".

Ruby LSP language server for Ruby and Rails projects in Google Antigravity.

Start Ralph Loop in current session

Create and setup a new Antigravity Agent SDK application

End-to-end onboarding for a freshly-plugged-in M5Stack ESP32 device (Cardputer, Cardputer-Adv, Core, CoreS3, Stick) — detect on USB, flash UIFlow 2.0 firmware, and install the Antigravity Buddy MicroPython app bundle. Use whenever the user plugs in or wants to flash/provision/reset an M5Stack or ESP32 board, or says "m5-onboard go".

This skill should be used when the user asks to "demonstrate skills", "show skill format", "create a skill template", or discusses skill development patterns. Provides a reference template for creating Google Antigravity plugin skills.

An example slash command that demonstrates command frontmatter options (legacy format)

Agentic skill for math-olympiad

Lua language server for Lua scripting, Game dev, and Neovim development in Google Antigravity.

write_to_file the phased Modernization Brief — the plan a steering committee approves and the build commands execute against

Show me the structure — dependencies, data flow, entry points and business flows, as an interactive map

Mine the business rules out of the code into testable Given/When/Then rule cards with file:line citations

UX Writing and Microcopy: labels, error messages, empty states, tooltips, onboarding copy, tone of voice. Use when writing user-facing text in interfaces to ensure clarity, consistency, and accessibility.

Backend architecture at the system level: microservices, distributed systems, event-driven design, and scalability. Use when designing overall backend structure, service boundaries, or integrations — not for writing endpoint code.

Build Java applications with Spring Boot 3.x/4.x, GraalVM native images, virtual threads, and cloud-native patterns. Use when developing Spring-based services, REST APIs, or enterprise Java backends.

Design, build, and orchestrate autonomous AI agents that decompose goals, plan, use tools, and self-correct. Use when implementing agent loops, tool-calling, multi-agent systems, or agent reliability.

Specialized skill for building production-ready serverless applications on GCP. Covers Cloud Run services (containerized), Cloud Run Functions (event-driven), cold start optimization, and event-driven architecture with Pub/Sub.

Webhook design and implementation: request/response contracts, idempotency, retries with exponential backoff, HMAC signature verification, replay protection. Use when building webhook receivers or senders in Spring Boot or any backend.