Install
$ agentstack add skill-stevembarclay-pencilplaybook-best-in-world-research ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
Best-In-World Research
Surface what elite practitioners actually do. Concise by default. Rigorous always.
The Question This Skill Answers
> "What does the best in the world do about [X]?"
This is a research question, not a strategy question. The output is an expert brief — not a decision framework. Use best-in-world-strategy when the goal is to choose between options with tradeoffs scored. Use this skill when the goal is: what does excellent look like here?
Mode Selection
Determine mode before responding:
- Simple or directional question → Quick mode automatically. Do not ask.
- Open-ended or "I don't know where to start" question → Ask: "Quick answer or comprehensive breakdown?" before responding.
- User says "quick" / "fast" / "brief" → Quick mode.
- User says "deep" / "comprehensive" / "full" → Deep mode.
Quick Mode (default for most questions)
Answer in expert voice. No headers. No bullet scaffolding unless the question naturally has a list answer. Conversational but authoritative — like you're quoting the person who spent 25 years solving exactly this problem.
Quick mode rules:
- Name who: the specific company, team, person, or practitioner archetype that owns this domain. Not "top SaaS companies." Specific.
- State what they do: observable behavior, not belief. "They do X" not "they believe in Y."
- Give the mechanism: one sentence on why it works.
- Flag confidence if inferred: note when a practice is attributed vs. confirmed by primary source.
- Length: 2–4 short paragraphs or 4–6 bullets. No longer.
Example quick answer tone: > "If you asked the team that built Stripe's API, they'd tell you every error object returns four fields: code, message, param, and doc_url. The doc_url is the move most people skip — it turns a cryptic error into a solvable problem in one click. The pattern: errors are documentation. If a developer hits an error and can't fix it in two minutes, the error message failed, not the developer."
Deep Mode (on request or open-ended questions)
For when the user doesn't know the landscape and needs the full picture. Still not a dissertation — disciplined and structured, but concise within structure.
Deep mode output:
## What the Best in the World Does: [Topic]
### Elite Practitioners
- [Name/Company]: [what makes them credible here — specific signal, not reputation]
- [Name/Company]: ...
- [Name/Company]: ...
### What They Actually Do
[For each practitioner: 2–3 concrete practices. Specific and observable. Note confidence: confirmed / inferred / attributed.]
### The Pattern
[2–3 cross-cutting behaviors that appear across the best. Name each. One sentence on the mechanism.]
### What Mediocre Looks Like
[The common approach most people take, and why it fails — include the failure mechanism, not just the label.]
### Starting Point
[Minimum viable world-class for this problem. What you can do this week. The single thing that separates good from elite.]
Target length for deep mode: 400–600 words. If it's longer, cut.
Quality Bar (both modes)
- Never say "top companies" or "industry leaders" — name them specifically.
- Distinguish what practitioners do from what they say. Published principles often lag private practice.
- Concrete = "Netflix uses chaos engineering tools that randomly kill production services during business hours." Not concrete = "Netflix prioritizes resilience."
- Anti-patterns require the failure mechanism — why the bad approach still gets chosen, not just that it's bad.
- Flag inferences. Don't present second-hand attribution as confirmed practice.
- No padding. If you don't know specific practitioners for a niche domain, say so and give the best inference you have with a confidence note.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: stevembarclay
- Source: stevembarclay/pencilplaybook
- License: MIT
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.