Probabilistic Thinking

Probabilistic Thinking is an AI Engineering skill for Claude Code, published by tjboudreaux in cc-thinking-skills.

969 stars133 forkson tjboudreaux/cc-thinking-skillsAdded 2026/08/21+1% in starsRepository updated 2026/08/07

agent-skillsai-toolsanthropicclaudeclaude-codecritical-thinkingdecision-makingfirst-principlesmental-modelsproblem-solvingsystems-thinking

Install in seconds

Install Probabilistic Thinking

Copy Probabilistic Thinking into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/tjboudreaux/cc-thinking-skills/tree/main/skills/thinking-probabilistic ~/.claude/skills/thinking-probabilistic

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/tjboudreaux/cc-thinking-skills.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/thinking-probabilistic/SKILL.md in tjboudreaux/cc-thinking-skills
Installs to: ~/.claude/skills/thinking-probabilistic
Collection: One of 25 skills cataloged from this repository
Category: AI Engineering — 2451 skills

What Probabilistic Thinking does

Probabilistic Thinking helps you forecast, estimate, and size risk with base rates, ranges, and explicit prior-to-posterior updates. Use it when a single confident number would be misleading or when new evidence should shift an estimate.

Probabilistic Thinking is cataloged under AI Engineering on DirSkills. Probabilistic Thinking comes from a repository tagged agent-skills, ai-tools, anthropic, claude and claude-code.

Documentation

README

Excerpt

Probabilistic Thinking

Core rule: State beliefs as numbers and ranges, not vibes. Anchor on a base rate, update with an explicit likelihood, and bound unknowns by factoring them — never invent false precision.

When to Use

Timeline, effort, or outcome forecasts where the true value is uncertain.
Risk sizing for a change, migration, deploy, or launch.
Any moment you are about to state a confident single number you cannot actually know.
New evidence arrives and a prior estimate should move.

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Probabilistic Thinking

What else does tjboudreaux publish alongside Probabilistic Thinking?
Probabilistic Thinking is one of 25 skills that DirSkills catalogs from tjboudreaux/cc-thinking-skills, the repository it ships in. Its siblings there include Bounded Rationality, Circle Of Competence and Effectuation. Each one is a separate skill with its own page in this directory, installs the same way Probabilistic Thinking does, and is maintained by tjboudreaux in that same repository. The rest of the collection is listed on the tjboudreaux/cc-thinking-skills page.
How does Probabilistic Thinking compare to other AI Engineering skills?
Probabilistic Thinking ranks #1403 by stars among the 2451 AI Engineering skills in this catalog. The most-starred ones next to it are Architecture Decision Records, AI-First Engineering and Agentic OS. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Probabilistic Thinking against them. Open each page to compare what they document and how they install.