A Claude skill that enforces staged execution discipline, multi-stage planning, sub-agent delegation, and self-verification for complex tasks. Includes variants for Opus/Sonnet/Haiku and an inline mode.
Collecting history — the radar snapshots this repo daily. The trend line appears after 3 days of data (1 so far).
What it is
A Claude skill that enforces staged execution discipline on large tasks: a written stage plan, parallel delegation where the runtime allows, a verification check at each stage that can actually fail, and a skeptical self-review before delivery.
How it works
The skill shapes the procedure a model follows on complex work: it decomposes tasks before acting, delegates independent sub-work where subagent tooling exists, verifies each stage against a failable check, and critiques its own output before delivering. Variants pass the same stage map, failable verification, self-critique, warning threshold, and find-and-replace safety rules to their subagents.
Getting started
Variants
Four variants share the same core loop:
- fable-mode: default inline run on current model (Opus when host).
- fable-opus: spawns a subagent pinned to Claude Opus with authority to route sub-parts to Sonnet/Haiku workers. Requires a runtime with the Agent tool.
- fable-sonnet: spawns a subagent pinned to Claude Sonnet. Requires a runtime with the Agent tool.
- fable-haiku: spawns a subagent pinned to Claude Haiku. Requires a runtime with the Agent tool.
The variants pass the same stage map, failable verification, self-critique, warning threshold, and find-and-replace safety rules down to their subagent. They do not raise the chosen model's reasoning ceiling.
Getting started
Place each skill directory (fable-mode, and optionally fable-opus / fable-sonnet / fable-haiku) wherever your Claude environment loads skills from (for example, a skills directory read by Claude Code), then invoke it by name or let it trigger on a qualifying task. Each variant's folder name must match the name: field in its frontmatter.
Files
SKILL.md- the skill itselfEXAMPLE.md- a worked before/after showing the verification check catching an error that a one-shot attempt shipsfable-opus/SKILL.md- the Opus variantfable-sonnet/SKILL.md- the Sonnet variantfable-haiku/SKILL.md- the Haiku variant
Installation
Place each skill directory (fable-mode, and optionally fable-opus / fable-sonnet / fable-haiku) wherever your Claude environment loads skills from (for example, a skills directory read by Claude Code), then invoke it by name or let it trigger on a qualifying task. Each variant's folder name must match the name: field in its frontmatter.