How to prompt Fable (and other next-generation frontier agentic models) to get outsized results — distilled from Matt Shumer's "How I Prompt Fable." Use when handing a big build/creative/engineering task to a top-tier model, when the user asks "help me write a prompt for X", mentions Fable, /loop, or ultracode, or says "I can't get results like the demos." Shifts prompting from step-by-step instructions to goal + house rules + a hard self-checkable bar + looping.
Multi-phase writing workflow with voice analysis, parallel critique, and compounding learnings. Auto-triggers on writing tasks, content generation, drafting, editing, or style questions. Use /write for the full loop, /write:critique for standalone review, /write:polish for refinement. Triggers on: write, draft, substack, linkedin, email, newsletter, social post, voice, style, anti-slop, de-slop, content creation, blog post, article, chapter.
Set up and authenticate the gws CLI (@googleworkspace/cli) for Google Workspace access. Use when setting up OAuth, authenticating on headless/remote machines, configuring agent account access, or troubleshooting gws auth issues. For daily Gmail/Calendar/Drive usage, defer to the official gws skills shipped with the CLI.
Design skills, CLIs, docs, and onboarding flows for AI coding agents. Use when writing agent skills, authoring SKILL.md files, designing CLI tools agents will use, creating onboarding READMEs, or reviewing any artifact where the primary consumer is a coding agent. Do NOT use for general technical writing or user-facing documentation.
Programmatic canvas toolkit for creating, editing, and refining Excalidraw diagrams via MCP tools with real-time canvas sync. Use when an agent needs to (1) draw or lay out diagrams on a live canvas, (2) iteratively refine diagrams using describe_scene and get_canvas_screenshot to see its own work, (3) export/import .excalidraw files or PNG/SVG images, (4) save/restore canvas snapshots, (5) convert Mermaid to Excalidraw, or (6) perform element-level CRUD, alignment, distribution, grouping, duplication, and locking. Requires a running canvas server (EXPRESS_SERVER_URL, default http://localhost:3000).