writing-friday-python-agents

Authoring guide for Python user agents (type:"user") on the Friday platform via the friday-agent-sdk. Covers the @agent decorator, AgentContext capabilities (ctx.llm, ctx.http, ctx.tools, ctx.stream), structured input parsing, result types, and the NATS subprocess execution model. Load when an agent.py exists in scope, when imports from friday_agent_sdk are present, when an @agent decorator is being authored or modified, or when upsert_agent was just called with type:user. Do NOT load to decide whether to author a user agent — that decision belongs in the workspace-chat agent_types rules.