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Agent skill

Antifragility Framework

by sandgardenhq in sandgardenhq/sgai

Black Swan Analysis provides a rigorous methodology for identifying high-impact, unpredictable events while building systems that thrive under volatility.

Custom licenceAuto-check passed

Install Antifragility Framework

skills CLI
$ npx skills add sandgardenhq/sgai --skill antifragility-framework -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install sandgardenhq/sgai antifragility-framework --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/sandgardenhq/sgai.git skills-src && mkdir -p .claude/skills && cp -r skills-src/cmd/sgai/skel/.sgai/skills/product-design/antifragility-framework .claude/skills/antifragility-framework && rm -rf skills-src

Use ~/.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/

Facts

Skill name
antifragility-framework
GitHub stars
137
Token cost
~934 tokens
SKILL.md length
427 words
Files
2
Skills in repo
53
Repo updated
First seen
Licence
Custom licence

At a glance

Black Swan Analysis provides a rigorous methodology for identifying high-impact, unpredictable events while building systems that thrive under volatility.

  • Works in 5 steps: Risk Inventory: A list of current… → The Narrative of the Unknown: Three… → The Antifragile Roadmap: Structured… → …
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Antifragility Framework is an agent skill from sandgardenhq/sgai. Black Swan Analysis provides a rigorous methodology for identifying high-impact, unpredictable events while building systems that thrive under volatility. You must use this framework when the human partner challenges you on your claims, or when the human partner asks you to create plans from vague instructions

Its SKILL.md is about 930 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `ABOUT.md`).

The repository describes itself as: Sandgarden AI Software Factory.

Example prompts

  • “/antifragility-framework”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Risk Inventory: A list of current fragile elements identified in the user input.
  2. The Narrative of the Unknown: Three detailed Black Swan scenarios.
  3. The Antifragile Roadmap: Structured advice using the Barbell Strategy and Optionality.
  4. Via Negativa Checklist: A list of things to stop doing or eliminate immediately.
  5. Final Heuristic: A single, powerful rule of thumb for the user to remember.

What it can do on your machine

Read from SKILL.md and the folder at commit 9efbb7b. 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.

    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

Antifragility Framework loads about 934 tokens when it runs. Until then it costs about 84 tokens; SKILL.md has 427 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~84
When it runs · the whole SKILL.md, loaded when a task matches
~934

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 427 words (~934 tokens).

“You are an expert Risk Strategist and Systems Thinker, specializing in the philosophies of Nassim Nicholas Taleb. Your expertise covers Black Swan theory, antifragility, the Lindy Effect, and the pitfalls of "The Ludic Fallacy." You excel at identifying "silent risks"…”

— opening of SKILL.md by sandgardenhq, Custom licence
name
antifragility-framework

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file in cmd/sgai/skel/.sgai/skills/product-design/antifragility-framework of sandgardenhq/sgai.

  • SKILL.md
  • ABOUT.md

Open the folder on GitHubat commit 9efbb7b

Compare with similar skills

Antifragility Framework 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.

Antifragility Framework compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Antifragility Framework this skillsandgardenhq/sgai137—~934Automated safety check: PassCustom licence
Benchmark Methodologyaffaan-m/ECC276k1 repos~2.5kAutomated safety check: PassMIT
Evaluation Methodologywshobson/agents40k—~2kAutomated safety check: PassMIT
Identifybrycewang-stanford/Auto-Empirical-Research-Skills4.5k—~1.3kAutomated safety check: PassCustom licence
Sparc Methodologyruvnet/ruflo74k—~262Automated safety check: PassMIT
Bb Methodologysickn33/agentic-awesome-skills47k1 repos~5.4kAutomated safety check: PassMIT

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Questions about Antifragility Framework

What does Antifragility Framework do?

Black Swan Analysis provides a rigorous methodology for identifying high-impact, unpredictable events while building systems that thrive under volatility. Antifragility Framework is an agent skill from sandgardenhq/sgai. Black Swan Analysis provides a rigorous methodology for identifying high-impact, unpredictable events while building systems that thrive under volatility.

How do I install Antifragility Framework in Claude Code?

Run `npx skills add sandgardenhq/sgai --skill antifragility-framework -a claude-code`. Or copy the skill folder (cmd/sgai/skel/.sgai/skills/product-design/antifragility-framework in sandgardenhq/sgai) into .claude/skills/antifragility-framework in your project. Claude Code loads it when a task matches its description.

How do I install Antifragility Framework in Codex?

Run `npx skills add sandgardenhq/sgai --skill antifragility-framework -a codex`. Or copy the skill folder (cmd/sgai/skel/.sgai/skills/product-design/antifragility-framework in sandgardenhq/sgai) into .agents/skills/antifragility-framework in your project. Codex loads it when a task matches its description.

Can I use Antifragility Framework 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 sandgardenhq/sgai --skill antifragility-framework -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/antifragility-framework, .gemini/skills/antifragility-framework, .github/skills/antifragility-framework and .opencode/skills/antifragility-framework in your project.

What does Antifragility Framework need to run?

SKILL.md names no scripts, command-line tools or credentials: Antifragility Framework is instructions for the agent only.

Does Antifragility Framework 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 Antifragility Framework 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 Antifragility Framework use?

Antifragility Framework has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Antifragility Framework use?

About 934 tokens (SKILL.md is roughly 3.7k 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 Antifragility Framework?

Skills that share tags, products or a category with Antifragility Framework: Benchmark Methodology (affaan-m/ECC, 276k stars), Evaluation Methodology (wshobson/agents, 40k stars), Identify (brycewang-stanford/Auto-Empirical-Research-Skills, 4.5k stars) and Sparc Methodology (ruvnet/ruflo, 74k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Antifragility Framework?

sandgardenhq (a GitHub organization) maintains it in sandgardenhq/sgai, which has 137 GitHub stars. The repository holds 53 skills in this directory. The repository was last updated on September 21, 2026.

Source: sandgardenhq/sgai on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.