deep-reasoner
Long, context-heavy investigations that would pollute the main context - exploring a large slice of a codebase, grinding through logs, multi-file debugging, background research. Returns a distilled conclusion, not raw material. Used by senior-fable mode for digging work; not for
$ npx -y skills add AndyShaman/senior-fable --agent claude-codeShips with senior-fable. Installing the plugin gets this agent.
How it fires
How this agent gets triggered: by you, by Claude, or both.
- Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.
- You can call itInvoke it directly when you want it.
Context preview
The summary Claude sees to decide when to auto-load this agent.
Long, context-heavy investigations that would pollute the main context - exploring a large slice of a codebase, grinding through logs, multi-file debugging, background research. Returns a distilled conclusion, not raw material. Used by senior-fable mode for digging work; not for
Tech-lead orchestration for Claude Code — the top-tier model (Fable) keeps architecture & decisions, cheap subagents (Sonnet/Opus) do the routine and the digging. Save tokens without losing quality.
Other agents on senior-fable.
- fast-worker
Mechanical, well-specified execution - writing tests to a spec, boilerplate, formatting, renames, simple edits with a clear definition of done. Not for design decisions, ambiguous requirements or investigations. Used by senior-fable mode for routine work.
Open agent - implementer
Feature-sized coding work where the decisions live inside the task - multi-file changes, refactors, end-to-end implementation from a spec. Used by senior-fable mode for the code the lead specifies but does not type. Not for mechanical edits with an obvious diff, and not for
Open agent - reviewer
Independent review of work someone else finished - a diff, a feature, a migration. Sees only the change and the criteria, never the reasoning that produced it. Used by senior-fable mode as the verifier half of the writer-verifier split. Not for reviewing your own work, and not
Open agent