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Bayesian Reasoning

Category: Science & Research  ·  Sub-category: math-stats  ·  Last updated:
Use when uncertainty must be updated after new evidence: start with a prior or base rate, estimate how strongly the evidence fits each hypothesis, update to a posterior, and decide what evidence would change the belief next. Covers priors, base rates, likelihood ratios, posterior odds, calibration, evidence independence, false positives in rare events, and base-rate neglect. Do NOT use for decomposing assumptions to primitives (use first-principles-thinking), tracing downstream consequences (use second-order-thinking), recurring issue clustering (use pattern-recognition), or formal source-to-claim citation (use epistemic-grounding).

What this skill does

Bayesian Reasoning is a community-contributed Claude Code skill in the math-stats sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/bayesian-reasoning/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when uncertainty must be updated after new evidence: start with a prior or base rate, estimate how strongly the evidence fits each hypothesis, update to a posterior, and decide what evidence would change the belief next. Covers priors, base rates, likelihood ratios, posterior odds, calibration, evidence independence, false positives in rare events, and base-rate neglect.

Who uses this skill

The Bayesian Reasoning Claude Code skill is built for researchers, data scientists, academics, and analysts working with complex data and scientific literature. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/bayesian-reasoning
curl -L https://claudskills.com/skills/bayesian-reasoning/SKILL.md \
  -o ~/.claude/skills/bayesian-reasoning/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/bayesian-reasoning/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/bayesian-reasoning/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\bayesian-reasoning\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

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See pricing → Download desktop app

Attribution & license

More Science & Research skills

Browse all Science & Research skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Science & Research skills → Top 100 skills
Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

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