agent-directory

Agent architecture patterns for Google ADK — when and how to use LlmAgent, LoopAgent, SequentialAgent, ParallelAgent, and multi-agent hierarchies. Load this skill when deciding the agent's architecture.

ADK callback signatures, HITL approval gates, and state management — exact parameter names, before/after hooks, EventActions.state_delta, and defensive HITL patterns. Load this skill when adding callbacks or approval gates to an agent.

Writing effective ADK system prompts — dynamic instructions with InstructionProvider, state placeholders, context injection, tone/style sections. Load this skill when creating or improving an agent's system prompt.

Creating valid SKILL.md files following the agentskills.io specification — frontmatter, instructions, references directory, progressive disclosure (L1/L2/L3), and SkillToolset wiring in agent.py. Load this skill when generating domain skills for an agent.

Five canonical skill design patterns for ADK agents: Tool Wrapper, Generator, Reviewer, Inversion, and Pipeline. Load this skill during Step 2 (Design) to recommend which patterns fit the user's agent, and during Step 4 (Generate) to get skeleton templates for each pattern.

Building voice and video agents with Gemini Live API — bidirectional streaming via WebSocket, LiveRequestQueue, run_live(), RunConfig, and audio/video patterns. Load when the user wants a voice agent, live agent, or real-time audio/video capabilities.

Building Google ADK function tools — ToolContext usage, proper signatures, error handling, return formats, type hints, and async patterns. Load this skill when creating custom tools for an agent.