rootnode-output-blockslisted
Install: claude install-skill drayline/rootnode-skills
# Output Format Selection for Claude Prompts
> **Calibration:** Tier 1 (Model-compatible) - runs cleanly on the current dual-primary tier (Opus 5, Sonnet 5) as well as Haiku 4.5 with extended thinking. Structured retrieval, rule evaluation, or template lookup - output shape does not depend on model class. Correct-shape output also on Opus 4.8 (fallback-graceful) and Sonnet 4.6 (legacy-graceful). See repository README for model compatibility.
Tested output format specifications that control what Claude's deliverable looks like — structure, sections, length, and format. Without an explicit output format, Claude defaults to its own formatting preferences, which often means overlong prose with excessive bullet points.
## When to Use This Skill
Use this Skill when you need to:
- Choose an output format for a Claude prompt you are building
- Structure a deliverable (brief, memo, plan, analysis, etc.)
- Design a custom output format for a deliverable type not covered here
- Fix output quality problems caused by missing or vague format instructions
This Skill provides the format specification (Layer 5 of a well-structured prompt). It does not cover identity, reasoning methodology, or quality control — for those, see rootnode-block-selection or rootnode-prompt-compilation if available.
## Quick-Reference: Deliverable Type → Format
| You need... | Use this format | Reference file |
|---|---|---|
| A decision or recommendation for senior leadership | Executive Brief | references/