Manage stacked branches and pull requests with GitHub's `gh stack` extension. Use when work involves stacked PRs, dependent branches, stack creation, navigation, submission, synchronisation, rebasing, restructuring, linking, or merging.
Develop and migrate OpenCode V2 plugins, clients, SDK hosts, and HTTP API integrations. Use for the OpenCode plugin API, `@opencode-ai/client`, `@opencode-ai/sdk`, server API, Effect entrypoints, or V1-to-V2 API migration.
Control the user's existing Chromium-family browser through the Browser Control extension and local relay with deterministic Playwright. Use when asked to inspect, automate, test, or interact with a visible browser tab; continue an authenticated browser…
Coordinate delegated agent sessions with bounded assignments, asynchronous background scheduling, soft concurrency caps, context-window rotation, independent review cycles, and logged cleanup across native child sessions and Herdr-managed agents. Use when…
Design, create, update, debug, audit, or upgrade GitHub Agentic Workflows with the `gh aw` extension. Use when work involves workflow Markdown, compiled `.lock.yml` files, agent engines, MCP tools, safe outputs, or `gh aw` commands.
Build disposable code to answer one design question. Use when the user wants to test whether logic or a state model feels right, or compare materially different UI directions before production implementation.
Grill the user about a plan, decision, or idea in dependency-ready rounds. Use when the user wants to stress-test their thinking or uses a grill trigger phrase.
Build and sharpen a project's domain model. Use when the user wants to pin down domain terminology or a ubiquitous language, challenge or record a design decision, or when another skill needs to maintain the domain model.