First Principles Thinking
mindfold-ai/Trellis
Systematic first principles thinking for any problem domain.
Reframe code design through functional programming principles for agent-assisted development.
No licenceAuto-check passed
Install Sc Think Functional
$ npx skills add kylesnowschwartz/SimpleClaude --skill sc-think-functional -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install kylesnowschwartz/SimpleClaude sc-think-functional --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/kylesnowschwartz/SimpleClaude.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/sc-skills/skills/sc-think-functional .claude/skills/sc-think-functional && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "sc-think-functional" agent skill from https://github.com/kylesnowschwartz/SimpleClaude/tree/main/plugins/sc-skills/skills/sc-think-functional into .claude/skills/sc-think-functional/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sc-think-functional", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/kylesnowschwartz/SimpleClaude/tree/main/plugins/sc-skills/skills/sc-think-functionalType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add kylesnowschwartz/SimpleClaude --skill sc-think-functional -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install kylesnowschwartz/SimpleClaude sc-think-functional --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/kylesnowschwartz/SimpleClaude.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/sc-skills/skills/sc-think-functional .agents/skills/sc-think-functional && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "sc-think-functional" agent skill from https://github.com/kylesnowschwartz/SimpleClaude/tree/main/plugins/sc-skills/skills/sc-think-functional into .agents/skills/sc-think-functional/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sc-think-functional", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add kylesnowschwartz/SimpleClaude --skill sc-think-functional -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install kylesnowschwartz/SimpleClaude sc-think-functional --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/kylesnowschwartz/SimpleClaude.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/sc-skills/skills/sc-think-functional .cursor/skills/sc-think-functional && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "sc-think-functional" agent skill from https://github.com/kylesnowschwartz/SimpleClaude/tree/main/plugins/sc-skills/skills/sc-think-functional into .cursor/skills/sc-think-functional/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sc-think-functional", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/kylesnowschwartz/SimpleClaude.git --path plugins/sc-skills/skills/sc-think-functional--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add kylesnowschwartz/SimpleClaude --skill sc-think-functional -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install kylesnowschwartz/SimpleClaude sc-think-functional --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/kylesnowschwartz/SimpleClaude.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/sc-skills/skills/sc-think-functional .gemini/skills/sc-think-functional && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "sc-think-functional" agent skill from https://github.com/kylesnowschwartz/SimpleClaude/tree/main/plugins/sc-skills/skills/sc-think-functional into .gemini/skills/sc-think-functional/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sc-think-functional", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install kylesnowschwartz/SimpleClaude sc-think-functionalInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add kylesnowschwartz/SimpleClaude --skill sc-think-functional -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/kylesnowschwartz/SimpleClaude.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/sc-skills/skills/sc-think-functional .github/skills/sc-think-functional && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "sc-think-functional" agent skill from https://github.com/kylesnowschwartz/SimpleClaude/tree/main/plugins/sc-skills/skills/sc-think-functional into .github/skills/sc-think-functional/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sc-think-functional", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add kylesnowschwartz/SimpleClaude --skill sc-think-functional -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install kylesnowschwartz/SimpleClaude sc-think-functional --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/kylesnowschwartz/SimpleClaude.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/sc-skills/skills/sc-think-functional .opencode/skills/sc-think-functional && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "sc-think-functional" agent skill from https://github.com/kylesnowschwartz/SimpleClaude/tree/main/plugins/sc-skills/skills/sc-think-functional into .opencode/skills/sc-think-functional/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sc-think-functional", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
sc-think-functional- GitHub stars
- 114
- Token cost
- ~3.7k tokens
- SKILL.md length
- 1,083 words
- Files
- 1
- Skills in repo
- 12
- Repo updated
- First seen
- Licence
- None found
At a glance
Reframe code design through functional programming principles for agent-assisted development.
- Works in 4 steps: Architecture (composition): Read this… → Edge functions (IO, DOM, network): Read… → Pure functions: Check types match. Skim… → …
- Says think functional
- SKILL.md covers Why FP Matters for Agents, The Reframe, The Toolkit and Applied to Stores (Zustand,…, plus 6 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Sc Think Functional is an agent skill from kylesnowschwartz/SimpleClaude. Reframe code design through functional programming principles for agent-assisted development. This skill SHOULD be used when the user says "think functional", "think FP", "make this pure", "separate effects", "where should this side effect go", "this function does too much", "how should I structure this for agents", "make this easier to review", "reduce context needed", or when planning module structure, store design, or code that agents will write and humans will review. Applies FP discipline within any language…
Its SKILL.md is about 3.7k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: Practical minimalism for AI assisted programming with Claude Code.
When your agent uses it
- Says think functional
- Separate effects
- Where should this side effect go
- This function does too much
Example prompts
- “think functional”
- “think FP”
- “make this pure”
- “/sc-think-functional”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Architecture (composition): Read this carefully. Does the wiring make sense? Are effects at the edges?
- Edge functions (IO, DOM, network): Read every line. These are where bugs live.
- Pure functions: Check types match. Skim body. If types are right and tests pass, the implementation is almost certainly correct.
- Test summaries: Are edge cases covered? Are pure functions tested with property-based or example-based tests?
What it can do on your machine
Read from SKILL.md and the folder at commit abb293b. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are typescript, jsonc and javascript).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Sc Think Functional loads about 3.7k tokens when it runs. Until then it costs about 149 tokens; SKILL.md has 1,083 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 1,083 words (~3,651 tokens).
“FP discipline for agent-assisted development. Not about switching languages — about structuring code so agents write it well and humans review it fast.”
- name
- sc-think-functional
Files
Just SKILL.md in plugins/sc-skills/skills/sc-think-functional of kylesnowschwartz/SimpleClaude.
Open the folder on GitHubat commit abb293b
Compare with similar skills
Sc Think Functional next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Sc Think Functional this skillkylesnowschwartz/SimpleClaude | 114 | — | ~3.7k | Automated safety check: Pass | None | |
| First Principles Thinkingmindfold-ai/Trellis | 15k | — | ~4.1k | Automated safety check: Pass | MIT | |
| Principle Foundational Thinkingcursor/plugins | 11k | 8 repos | ~383 | Automated safety check: Pass | None | |
| 142 Java Functional Programmingjabrena/plinth | 447 | — | ~1.1k | Automated safety check: Pass | Apache-2.0 | |
| Principle Redesign From First Principlescursor/plugins | 11k | 8 repos | ~211 | Automated safety check: Pass | None | |
| Thinking First Principlestjboudreaux/cc-thinking-skills | 1.6k | — | ~839 | Automated safety check: Pass | MIT |
Similar skills
- Official
Principle Foundational Thinking
cursor/plugins
Apply before writing logic: choosing core types and data structures, sequencing scaffold-vs-feature work, asking what concurrent actors share.
142 Java Functional Programming
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A skill your agent uses when you need to apply functional programming principles in Java — including writing immutable objects and Records, pure functions, functional interfaces, lambda expressions…
- Official
Principle Redesign From First Principles
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Apply when integrating a new requirement into an existing design.
Thinking First Principles
tjboudreaux/cc-thinking-skills
When a constraint is treated as fixed, separate physics from convention, keep only independently supported primitives, and rebuild the simplest solution that satisfies real constraints.
Azure Functions
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Questions about Sc Think Functional
What does Sc Think Functional do?
Reframe code design through functional programming principles for agent-assisted development. Sc Think Functional is an agent skill from kylesnowschwartz/SimpleClaude. Reframe code design through functional programming principles for agent-assisted development.
When should I use Sc Think Functional?
Sc Think Functional fits situations like: says think functional; separate effects; where should this side effect go; this function does too much.
How do I install Sc Think Functional in Claude Code?
Run `npx skills add kylesnowschwartz/SimpleClaude --skill sc-think-functional -a claude-code`. Or copy the skill folder (plugins/sc-skills/skills/sc-think-functional in kylesnowschwartz/SimpleClaude) into .claude/skills/sc-think-functional in your project. Claude Code loads it when a task matches its description.
How do I install Sc Think Functional in Codex?
Run `npx skills add kylesnowschwartz/SimpleClaude --skill sc-think-functional -a codex`. Or copy the skill folder (plugins/sc-skills/skills/sc-think-functional in kylesnowschwartz/SimpleClaude) into .agents/skills/sc-think-functional in your project. Codex loads it when a task matches its description.
Can I use Sc Think Functional in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add kylesnowschwartz/SimpleClaude --skill sc-think-functional -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/sc-think-functional, .gemini/skills/sc-think-functional, .github/skills/sc-think-functional and .opencode/skills/sc-think-functional in your project.
What does Sc Think Functional need to run?
SKILL.md names no scripts, command-line tools or credentials: Sc Think Functional is instructions for the agent only.
Does Sc Think Functional access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Sc Think Functional safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Sc Think Functional use?
No licence was found for Sc Think Functional or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Sc Think Functional use?
About 3.7k tokens (SKILL.md is roughly 15k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Sc Think Functional?
Skills that share tags, products or a category with Sc Think Functional: First Principles Thinking (mindfold-ai/Trellis, 15k stars), Principle Foundational Thinking (cursor/plugins, 11k stars), 142 Java Functional Programming (jabrena/plinth, 447 stars) and Principle Redesign From First Principles (cursor/plugins, 11k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Sc Think Functional?
kylesnowschwartz (a GitHub user) maintains it in kylesnowschwartz/SimpleClaude, which has 114 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on October 10, 2026.
Source: kylesnowschwartz/SimpleClaude on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.