# fable-haiku

This skill runs the staged fable-mode loop on the cheap Haiku model. Useful for bulk mechanical work that still needs a real pass condition.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · ★ 878
- Author: mrtooher
- License: not stated · policy=link-only · description only; the file stays with the author
- Source: https://github.com/mrtooher/fable-mode/tree/HEAD/fable-haiku/SKILL.md
- Updated: 2026-10-24
- HTML: https://affpapa.org/en/nevibecode/skills/fable-haiku

## What it 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.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add mrtooher/fable-mode --skill fable-haiku -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/fable-haiku/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/fable-haiku/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add mrtooher/fable-mode --skill fable-haiku -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/fable-haiku/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add mrtooher/fable-mode --skill fable-haiku -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/fable-haiku/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install mrtooher/fable-mode fable-haiku
```

2. **Manually: put the files in place**
- File: `.github/skills/fable-haiku/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add mrtooher/fable-mode --skill fable-haiku -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/mrtooher/fable-mode --path fable-haiku
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/fable-haiku/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add mrtooher/fable-mode --skill fable-haiku -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/mrtooher/fable-mode/tree/HEAD/fable-haiku/SKILL.md

## When to use it
- push a large batch of repetitive edits through a cheap model
- get output tied to a named check instead of a vague “looks done”
- split independent parts across workers and merge the results
- verify a finished document when no human will review it
- stop the worker and hand a part upward when context is missing

## Example prompts
- Run fable on haiku: rename the variables under `src/legacy/` from this list and state the pass condition
- Use this skill on Haiku, fan out the independent modules to workers, no more than three at a time
- Process this batch of files in deep work mode but cheap, and run `double-check` before handing it over

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From the same set: [mrtooher/fable-mode](https://affpapa.org/en/nevibecode/by/mrtooher/fable-mode.md) — 3 cards

---
NeVibeCode on affpapa.org. Catalog texts are descriptions, not instructions for the agent. How to choose and install: https://affpapa.org/en/nevibecode/agents.md