I shipped a real thing. Agent_Sudo is a local permission gateway for AI agents: it sits in front of an agent's tool calls and decides allow / deny / require-approval based on policy and where the request originated, and it writes a tamper-evident, hash-chained audit log you can verify. Python, zero runtime dependencies, ~190 passing tests, an MCP server, working examples for LangGraph and PydanticAI, published to PyPI as v0.4.0. It's solid. I'm proud of the engineering. And the most useful things I've learned so far have had almost nothing to do with the code. I'm in the middle of figuring out whether anyone actually needs this. Here's what that's teaching me honestly, while it's still in progress. Engineering quality and demand are completely different variables For weeks I measured the project by the things engineers measure: tests green, modules clean, no dependencies, careful abstractions. All real, all satisfying and none of it tells you whether a single person wants the tool.…