antifragile

antifragile is a skill for Claude Code, Codex from deciqAI/knowledge-skills. It costs 123 tokens per session (1,897 once invoked), scanned A, original, MIT.

A way to design systems that can improve after stress, uncertainty, or disruption, rather than merely survive it. The idea comes from Nassim Nicholas Taleb and differs from being simply robust.

In plain words
What is it for?
Stress-testing businesses, portfolios, careers, and plans; examining dependence on one supplier or software service; and planning for worst-case events.
Why use it?
A system can look stable while hiding weaknesses that appear during a rare crisis. This approach helps reveal those weaknesses and limit damage while leaving room to benefit from unexpected opportunities.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Stress-testing businesses, portfolios, careers, and plans; examining dependence on one supplier or software service; and planning for worst-case events.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/deciqai/knowledge-skills/antifragile
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add deciqAI/knowledge-skills --skill antifragile
Clone the repo
git clone --depth 1 https://github.com/deciqAI/knowledge-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for antifragile

README.md
[![agentmods](https://agentmods.dev/badge/skills/deciqai/knowledge-skills/antifragile/github.svg)](https://agentmods.dev/skills/deciqai/knowledge-skills/antifragile)
Your own site
<a href="https://agentmods.dev/skills/deciqai/knowledge-skills/antifragile"><img src="https://agentmods.dev/badge/skills/deciqai/knowledge-skills/antifragile/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for antifragile

Your own site · 80×15
<a href="https://agentmods.dev/skills/deciqai/knowledge-skills/antifragile"><img src="https://agentmods.dev/badge/skills/deciqai/knowledge-skills/antifragile.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 123 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,897 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00123 $0.01897
Opus 5 $0.00062 $0.00949
Sonnet 5 $0.00025 $0.00379
Haiku 4.5 $0.00012 $0.00190

Measured 9d ago against content hash 1df5c56c22ab, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

antifragile scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

antifragile/SKILL.md · 124 lines

How it starts

The opening of the file, as written. The whole thing — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Antifragile

Overview

Nassim Nicholas Taleb (2012) identified a third response to stress beyond fragile/robust: antifragile — systems that gain from disorder, with bounded downside and unbounded upside.

  • Fragile: concave — absorbs small stress, breaks catastrophically at the tail. (Over-leveraged banks, just-in-time supply chains.)
  • Robust: linear — unchanged by stress. (Physical infrastructure, traditional skills.)
  • Antifragile: convex — improves under stress. (Evolution, the immune system, the restaurant industry as a whole.)

Core warning: most modern complex systems are hidden-fragile — stable only because the tail event hasn't arrived yet. Composes with inversion, black-swan, expected-value-and-kelly, feedback-loops.

When to Use

  • A system looks stable but may be hidden-fragile
  • Designing a portfolio (financial, career, organizational) under uncertainty
  • A "this can't happen" assumption is embedded in a strategic plan
  • Recurrent small problems are suppressed rather than learned from
  • A business depends on one AI/model vendor's API, pricing, or policy, or faces AI-native competition amid rapid AI capex and adoption shifts
  • User says: "Taleb," "barbell strategy," "convex," "skin in the game," "via negativa"

Not when: decision is small and reversible; system is simple and low-stakes; you confuse high-variance with antifragile.

Coaching Novices (Adaptive Front Door)

  • Engine mode: user has a concrete system → run The Process directly.
  • Coach mode: user is unfamiliar → guide step by step. In Coach mode, respond one step at a time. Each [WAIT] is a hard stop — output only that step's question, then stop.
  1. One-line: some things break under stress, some survive, some get stronger — most "stable" things are in the first category, just before stress arrives.
  2. Check fit: small reversible decisions → not this lens.
  3. Elicit their real system — what specifically are they stress-testing?

[WAIT — do not advance until user responds]

  1. Walk through The Process one step at a time with their input.

[WAIT — do not advance until user responds]

  1. Close by naming the specific design move (barbell / via negativa / optionality / skin-in-the-game) that fits their case.

[WAIT — do not advance until user responds]

Read the full file on GitHub · 124 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 124 lines · 123 tokens per session scan A 1df5c56c22ab

Subscribe to this mod's changes

antifragile is a skill published in the GitHub repository deciqAI/knowledge-skills (10 stars, last pushed 7d ago), licensed MIT. It adds 123 tokens to every session and 1,897 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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