fable-haiku — Claude Code skill: fable-mode discipline on Haiku

What fable-haiku does

The skill does no work itself. It hands the task to the @fable-worker-haiku subagent, whose prompt carries the staged loop and a stricter verification rule: a bare “unverified” label will not pass. When the worker lacks what it needs, it escalates instead of guessing.

Setup goes in order. First the skill checks that fable-worker-haiku exists among the available agent types; if it does not, it spawns a general-purpose Haiku agent and passes the rules from agents/fable-worker-haiku.md as they are. Then it spawns the worker through the Task tool with the task, the output paths and the pass condition spelled out. Independent sub-parts can go to separate workers and be merged, with a cap on how many run at once. Anything delivered without human review gets a second pass from @fable-verifier.

Before the result reaches you, the double-check skill runs on the finished deliverable. That gate is not optional. If the verifier already cold-checked the final document, double-check only handles the seam check. A task with one obvious approach and a single pass skips the loop entirely. Work that needs synthesis belongs on fable-sonnet instead.