Compare · Methodology
one-three-one-rule vs prompt-optimizer
Which methodology skill is right for you?
01 — TL;DR
If you need trigger clarity above all else, pick prompt-optimizer (4.7/5). one-three-one-rule (4.4/5) is a reasonable alternative if you're already in its source ecosystem. They overlap in methodology skill territory.
Side by side
4.4/5
4.7/5
Where they differ
- Trigger clarity. trigger clarity: prompt-optimizer is clearly stronger (4.5 vs 5.0). For workloads where this dimension matters, prefer prompt-optimizer.
- Output specificity. output specificity: prompt-optimizer is clearly stronger (4.5 vs 5.0). For workloads where this dimension matters, prefer prompt-optimizer.
- Scope precision. scope precision: one-three-one-rule and prompt-optimizer score essentially the same (4.5 vs 4.5). Neither has an edge here.
- Self-containment. self-containment: prompt-optimizer is clearly stronger (4.5 vs 5.0). For workloads where this dimension matters, prefer prompt-optimizer.
- Reusability. reusability: one-three-one-rule is clearly stronger (4.0 vs 3.5). For workloads where this dimension matters, prefer one-three-one-rule.
Which to pick
When to choose one-three-one-rule
- Your workload emphasizes reusability — one-three-one-rule scores 4.0 vs 3.5 here.
- You prefer the curated marketplace source — one-three-one-rule comes from skillsmp.com, prompt-optimizer from github:SKILL.md.
- You weight community adoption — one-three-one-rule's upstream repo has 218,765 stars vs 0.
When to choose prompt-optimizer
- Your workload emphasizes trigger clarity — prompt-optimizer scores 4.5 vs 5.0 here.
- Your workload emphasizes output specificity — prompt-optimizer scores 4.5 vs 5.0 here.
- Your workload emphasizes self-containment — prompt-optimizer scores 4.5 vs 5.0 here.
- Multi-source consensus matters to you — prompt-optimizer appears in 2 of our tracked sources (one-three-one-rule: 1).
Scenario by scenario
| Scenario | Winner | Why |
|---|---|---|
| Agent must auto-select between many methodology skills | prompt-optimizer | Trigger clarity decides — clearer triggers reduce routing errors. |
| Output must be a specific file format or structured data | prompt-optimizer | Output specificity determines whether downstream tools can rely on the result. |
| Skill must be readable and complete out of the box | prompt-optimizer | Self-containment matters when you're not the original author. |
| Cross-team or cross-project reuse expected | one-three-one-rule | Reusability separates one-off scripts from durable building blocks. |
Common questions
- Which is better, one-three-one-rule or prompt-optimizer?
- prompt-optimizer ranks higher overall (4.7 vs 4.4 on our 0–5 rubric). That said, the better choice depends on which dimensions matter most for your use case.
- Are one-three-one-rule and prompt-optimizer both free to use?
- Both skills are free and open-source (or freely licensed). one-three-one-rule: See source repo. prompt-optimizer: See source repo. Installation has no cost; usage costs depend on the underlying LLM tokens consumed when you invoke the skill.
- Can I install both one-three-one-rule and prompt-optimizer at the same time?
- Yes. Agent skills are not exclusive — an agent runtime (Claude Code, Codex, etc.) can have many skills installed and route to whichever matches the current task. Installing both is a low-cost way to keep your options open.
- Where do these skills come from?
- one-three-one-rule is sourced from skillsmp.com (curated marketplace). prompt-optimizer is sourced from github:SKILL.md (community). We verify each skill across multiple sources where possible; one-three-one-rule appears in 1 source, prompt-optimizer in 2.