What problem does it solve? After running trellis init, teams often need to adapt the generated Trellis setup to their own workflow, but it is unclear which local files control phases, hooks, agents, skills, and context injection. This Skill teaches an AI assistant the local Trellis architecture so it can safely modify .trellis/ and platform directories without touching upstream source code. ## Core Features & Use Cases - Architecture Guidance: Explains the three-layer local Trellis model (workflow, persistence, platform integration) and which files are editable versus managed. - Customization Routing: Maps user requests like "change the workflow" or "the agent did not read specs" to the exact reference document and file to edit. - Platform Coverage: Documents file locations and integration modes for Claude Code, Cursor, Codex, OpenCode, Kiro, Gemini CLI, GitHub Copilot, and more. - Use Case: A user says "make the check agent run our lint command before finishing." The AI reads this Skill, opens the change-agents reference, and edits the platform's trellis-check agent file plus .trellis/spec/ accordingly. ## Quick Start Ask the AI to customize your local Trellis setup, for example: change the workflow so tasks can be skipped for one-line fixes in this project.