Ensure Tessl tiles meet all requirements for public registry publication with comprehensive validation. Use when publishing skills to public registry, validating tile.json configuration, creating evaluation scenarios, checking quality thresholds (A-grade ≥108/120), or preparing skills for release. Validates eval scenario coverage, tile.json fields (name, version, private, summary, skills), agent-agnostic compliance, and publication readiness.

Guide for setting up secured VS Code dev containers for coding agents. Use when creating or hardening a DevContainer to sandbox Claude Code or other coding agents, configuring Docker socket proxies, handling VS Code IPC escape vectors, setting up git worktree support, or verifying security controls. Covers threat model, three-layer defence architecture, Node.js/pnpm setup, and verification testing.

Comprehensive React Flow (@xyflow/react) patterns and best practices for building node-based UIs, workflow editors, and interactive diagrams. Use when working with React Flow for (1) building flow editors or node-based interfaces, (2) creating custom nodes and edges, (3) implementing drag-and-drop workflows, (4) optimizing performance for large graphs, (5) managing flow state and interactions, (6) implementing auto-layout or positioning, or (7) TypeScript integration with React Flow.

Create OpenCode plugins using the opencode-ai/plugin SDK. Use when user wants to build a plugin, extend OpenCode, intercept tool execution, add custom tools, react to events, create a hook, block commands, add custom auth, or add automation to OpenCode. Also use for 'opencode plugin', 'custom tool', 'tool hook', 'plugin hook', 'logging for all tool calls', 'restrict what commands the AI can run', 'lifecycle hooks', 'middleware', 'tool.execute.before', 'tool.execute.after', 'auth hook', 'chat.params', 'intercept bash commands', 'block file writes', 'add audit logging', 'custom model provider auth', 'inject context before LLM call', 'fire-and-forget background task', 'watch session events'.

Build custom tools and plugins using the OpenCode SDK packages. Use when creating custom tools, implementing tool schemas, building plugins, managing OpenCode sessions, using opencode-ai/sdk or opencode-ai/plugin, creating a tool.ts file, writing an execute handler, using tool.schema, ToolContext, createOpencode, plugin hooks, custom auth, automating OpenCode from a script, building a CI tool, or integrating external APIs. Keywords: Zod schema, execute handler, event streaming, session management, abort signal, tool discovery, multiple tools per file, tool factory.

Configure OpenCode via opencode.json and AGENTS.md with deterministic provider setup, model selection, permission policies, formatter behavior, and environment variable handling; use when editing opencode configuration, setting model/provider defaults, tightening agent permissions, or troubleshooting OpenCode config behavior.

Operate the Graphite Merge Queue — enqueue PRs via label, dequeue, monitor queue status, and reason about stacked-PR queueing. Use when the user mentions Graphite merge queue, "merge when ready", queueing a PR, dequeueing, fast-track, the merge-queue label, "enqueue", "the queue", or when they ask to merge a PR/stack through Graphite (not directly). Triggers on phrases like "queue this PR", "add to merge queue", "enqueue stack", "remove from queue", "why didn't my PR merge", and on edits to `.please/config.yml` under `graphite.merge-queue`.

Configure a GitHub repository for Graphite — branch protection, merge queue, CI triggers, and stack-aware CI optimizations. Use when the user is onboarding a repo to Graphite, mentions Graphite branch protection / required checks / signed commits / merge queue, sees CI failing on `graphite-base/*` branches, asks about merge-queue choice (Graphite vs GitHub vs external), or wants to reduce CI cost for stacked PRs (CI Optimizations, stack-aware CI, `needs.optimize_ci.outputs.skip`). Triggers on `.github/workflows/*.yml` changes for repos using Graphite, the phrases "stack CI", "stacking and CI", "graphite-base", and any branch-protection or merge-queue discussion in a Graphite repo.

Drive the Graphite CLI (`gt`) for stacked pull-request workflows. Use when the user works with stacked PRs, mentions Graphite, gt, "the stack", or wants to create/submit/sync/restack/split/squash/fold branches. Triggers on `gt` commands, "stack of PRs", "stacked diffs", "trunk-based", `.graphite_repo_config`, branches prefixed by a Graphite user (e.g. `lms--`, `pp--`).

Extract clean markdown content from web pages using Defuddle CLI, removing clutter and navigation to save tokens. Use instead of WebFetch when the user provides a URL to read or analyze, for online documentation, articles, blog posts, or any standard web page.

Create and edit JSON Canvas files (.canvas) with nodes, edges, groups, and connections. Use when working with .canvas files, creating visual canvases, mind maps, flowcharts, or when the user mentions Canvas files in Obsidian.

Create and edit Obsidian Bases (.base files) with views, filters, formulas, and summaries. Use when working with .base files, creating database-like views of notes, or when the user mentions Bases, table views, card views, filters, or formulas in Obsidian.