Use when deciding whether to dispatch subagents, when to stay in main context, or when facing 2+ independent parallel tasks. Triggers: 'should I use a subagent', 'parallelize', 'multiple independent tasks', 'run these at the same time', 'split this up', 'do both at once', 'dispatch template', 'context minimization'.
Use when writing or de-slopping outward-facing prose: newsletters, blog posts, announcements, marketing or landing copy, emails, release notes, doc intros. Triggers: 'make this sound human', 'this reads like AI', 'de-slop this', 'remove the AI tells', 'make it less AI', 'why does this sound like ChatGPT', 'help me draft this piece', 'write a newsletter', 'write a blog post', 'polish this copy', 'tighten this'. Composes with a personal voice skill (for example my-voice-skill) that supplies identity and register; this skill is voice-neutral and supplies the writing process plus the anti-slop catalog. NOT for: code logic or code review (use code-review), project doc structure (use documenting-projects), READMEs (use write-readme / polish-repo), or a specific person's voice (use their voice skill).
Use when building, creating, modifying, or planning any code change. Triggers: "implement X", "build Y", "add feature Z", "create X", "change how X works", "modify Y", "update the Z", "refactor X", "rework Y", "restructure Z", "make X do Y", "let's plan how to", "plan the implementation", "how should we implement", "how would you build", "what's the best way to implement", "I want to...", "We need...", "Would be great to...", "Can we add...", "Let's add...", "Let's build...", "Let's make...", "start a new project". Also for: new projects, repos, templates, greenfield development, refactoring, migrations, multi-file modifications, any code change requiring planning. PREFER THIS OVER plan mode or ad-hoc implementation for ANY substantive code change. NOT for: bug fixes (use debugging), pure research (use deep-research), questions about existing code without intent to change it, or test-only fixes (use fixing-tests).
Algorithmically estimate engineering tickets, JIRA cards, test cards, or feature requests. Produces well-scoped, AI-productivity-adjusted, PERT-buffered estimates with 80/90/95% confidence intervals for single and multi-engineer execution. Triggers - "estimate this ticket", "estimate this card", "estimate this test card", "size this", "story point this", "/estimate", "how long will this take", "T-shirt this", "point this story", "planning poker", "PERT estimate", "give me a timeline", "scope this work".
Use when implementation is complete, tests pass, and you need to decide the integration path. Also use when asked to prepare a branch for release: 'update changelog', 'bump version', 'bump patch version', 'make sure changelog is correct', 'make sure version is correct'. Triggers: 'done with this branch', 'ready to merge', 'ship it', 'wrap this up', 'how should I integrate this', 'what next after implementation'. NOT for: PR creation mechanics (use creating-issues-and-pull-requests) or deciding whether to merge (use finishing-a-development-branch first).
Use when an operator decision belongs on a browser page rather than a terminal prompt. Triggers: "present a decision in the browser", "ask via a canvas page", "interactive decision page", "let me decide in the browser", "render the choice visually". Also invoked by develop when the decision-surface preference is `canvas` (feature-config Question 8). NOT for: quick yes/no with no context (use terminal `AskUserQuestion`), read-only presentation (use `canvas`), or subagent-internal choices with no operator (decide in-context).
Use when the user wants to present rendered output (diagrams, plans, charts, status, side-by-side options) outside the terminal. Triggers: 'open a canvas', '/canvas', 'put this in a canvas', 'visualize this', 'render this in the browser', 'canvas name', 'close the canvas'. NOT for: live-editable artifacts where the browser writes (use a2a for that), persisted documents (use ~/.local/spellbook/docs/), or anything requiring SSR.
Use when the user wants two or more Claude/agent sessions to talk to each other via the filesystem. Triggers: 'your name for inter-agent chat is X', 'your a2a name is X', 'listen for messages', 'open as X', 'talk to the session named Y', 'send a message to session Y', 'check the inbox', 'reply to that session', 'inter-agent chat', 'inter-agent messaging', 'agent2agent', 'a2a', 'agent bus', 'message another session', 'tell session Y to', 'ask session Y'. NOT for: dispatching subagents within one session (use the Task tool), or pub-sub between non-Claude processes (use a real broker like Redis).