Orchestrate Claude and Codex worker TUIs from a controller agent through herdr panes and the herdr socket CLI. Use when delegating bounded tasks to herdr worker panes, running user-activated plan-first delegations (Claude Code plan mode, Codex Plan mode), waiting on native agent status (idle, working, blocked, done), or verifying worker reports. Workers launch as interactive TUIs via herdr agent start — never through headless runners (compozy exec, claude -p, codex exec). Not for cmux workspaces (see cmux-orchestration) and not for end-user herdr control.

Intelligently handle git rebase operations and resolve merge conflicts while preserving features and maintaining code quality. Use when rebasing feature branches, resolving conflicts across commits, and ensuring clean linear history without losing changes. Don't use for merge-commit workflows, cherry-picking individual commits, or initial repository setup.

Authoritative guide for the Fumadocs documentation framework — Core (headless), MDX (content loader), and UI (Tailwind v4 layouts and components). Use when scaffolding a Fumadocs project, editing source.config.ts, wiring loader() and meta.json conventions, picking a search adapter, composing DocsLayout/Notebook/Flux/Home layouts, customising the MDX component map, integrating OpenAPI specs, generating OG images, exporting PDF/EPUB/RSS, or configuring i18n across Next.js, React Router, TanStack Start, and Waku adapters. Surfaces canonical install snippets per adapter, decision tables for entry modes and content sources, and the most common pitfalls (Tailwind v3 silent failure, ESM-only config, .source/ generation, layout/page import mismatch, slug collisions, edge runtime ban). Don't use for generic MDX/Markdown questions outside Fumadocs, for unrelated React framework setup, or for projects that don't use fumadocs-core/fumadocs-mdx/fumadocs-ui.

Generate custom favicons from logos, text, or brand colours. Produces all required formats: favicon.svg, favicon.ico, apple-touch-icon.png, icon-192/512.png, and web manifest. Use when initialising websites, replacing CMS default favicons, converting logos to favicons, creating branded icons from initials, or troubleshooting favicon not displaying, iOS black square, or missing manifest.

Isolates Compozy runtime state for concurrent worktrees and QA runs. Use when another agent or runtime may share the machine, or when creating a parallel worktree. Do not use for single-worktree or build-only work.

Screenshot capture for deterministic PNG evidence and visual-contract bundles for Compozy Storybook stories and local UI URLs. Use for visual audits, regression diffs, and design-parity checks. Do not use for interactive E2E flows, remote authenticated sites, or Storybook test execution.

Go test-shape discipline for Compozy. Use when writing or editing *_test.go under cmd or internal after test placement is justified. Do not use for non-Go tests, fixture-only changes, or as a replacement for eng-consolidate-test-suites.

Authors append-only Goose SQL migrations for Compozy SQLite streams and keeps declarative schema sources, atlas.sum, Atlas checks, sqlc output, and migration tests synchronized. Use for SQLite table, column, index, constraint, trigger, or seed-data changes under internal/store or internal/memory. Do not use for in-memory structures, derived Markdown memory, or non-SQLite caches.

Dogfoods Compozy through an autonomous startup scenario with live providers, cross-surface observation, and strict evidence audit. Use for release or complex-integration QA. Do not use for smoke, static, mock-only, or unit-test work.

Bootstraps isolated Compozy QA labs and emits the canonical manifest for downstream QA. Use when local QA needs daemon, workspace, provider, or playbook setup. Do not use for unit tests, planning-only work, or browser-only checks.

Compozy visual-design authority for production UI, static artifacts, prototypes, and reviews. Use when creating or reviewing a Compozy surface or changing tokens, typography, spacing, depth, icons, or motion. Do not use for capture-only verification; use eng-ui-screenshot.

Data-boundary audit for Compozy route loaders, TanStack Query caches, paginated catalogs, filters, ordering, totals, live streams, workspace-scoped reads, and their backend APIs. Use when adding, changing, or debugging those paths. Don't use for presentational-only UI or backend work with no public read-model impact.

Contract co-ship for Compozy wire changes. Use when editing public DTOs, OpenAPI, JSON-RPC extension shapes, generated clients, or handler request/response semantics. Do not use for internal Go refactors or test-only changes that leave the wire contract unchanged.

Use when adding, moving, reviewing, or auditing tests in Compozy to identify the invariant, owning layer, and canonical suite before changing coverage. Do not use as a replacement for framework-specific testing skills or final verification gates.

Go production discipline for Compozy. Use when writing or editing non-test Go files under cmd or internal, including config, logging, CLI, concurrency, and process-lifecycle paths. Do not use for Go tests; pair it with the narrower schema, contract, cleanup, or network skill when those domains apply.

Partial-failure cleanup audit for Compozy Go functions. Use when a changed function acquires, registers, starts, claims, leases, or opens more than one fallible resource before returning. Do not use for pure transformations, read-only helpers, or test-only code.

Diátaxis Documentation Expert. An expert technical writer specializing in creating high-quality software documentation, guided by the principles and structure of the Diátaxis technical documentation authoring framework.

Deep review of branch diffs, working trees, or GitHub PRs at any size. Use when the user asks for CodeRabbit-grade review, an incremental re-review after new pushes, publication of findings to a PR, a cross-LLM peer-review verdict round, or conformance review against spec artifacts. Don't use for applying fixes, reviewing specs or PRDs as documents, or quick single-file feedback.

Maintains workflow-scoped task memory for Compozy runs using .compozy/tasks/<name>/memory/ files. Use when a task prompt provides workflow memory paths and requires the agent to read, update, compact, and promote durable context across PRD task executions. Do not use for PR review remediation, global user preferences, or programmatic event-log summarization.

Audits a backend Compozy change for downstream impact on web/, packages/site, agent-operable CLI/HTTP/UDS surfaces, extensibility surfaces, and config.toml. Adds explicit impact subitems to backend tasks, even when the conclusion is no impact. Use when drafting tasks or reviewing TechSpec coverage for changes touching contracts, handlers, CLI verbs, config, extensions, hooks, skills, tools, resources, bundles, registries, bridges, MCP, or agent workflows. Do not use for purely internal refactors with no public, agent, config, docs, or extensibility surface.