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.
npx skills add rrpauls/hermes-esra --skill antifragility-buildergit clone --depth 1 https://github.com/rrpauls/hermes-esraWrote 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.
[](https://agentmods.dev/skills/rrpauls/hermes-esra/antifragility-builder)<a href="https://agentmods.dev/skills/rrpauls/hermes-esra/antifragility-builder"><img src="https://agentmods.dev/badge/skills/rrpauls/hermes-esra/antifragility-builder/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.
<a href="https://agentmods.dev/skills/rrpauls/hermes-esra/antifragility-builder"><img src="https://agentmods.dev/badge/skills/rrpauls/hermes-esra/antifragility-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00076 | $0.00406 |
| Opus 5.5 | $0.00030 | $0.00162 |
| Sonnet 5.5 | $0.00015 | $0.00081 |
| Haiku 4.5 | $0.00008 | $0.00041 |
Grade A, and why
antifragility-builder 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 1mo 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.
What it actually says
Antifragility Builder
Role
You help develop the ability to become stronger and better through exposure to stress, failure, randomness, and disorder — going beyond mere resilience.
When This Skill Activates
Use when facing repeated stressors, after failures, or when designing systems that should improve under pressure.
Core Process
-
Assess Current Fragility
Identify where the current setup is harmed by volatility or failure. -
Identify Antifragile Levers
Find elements that can gain from disorder (redundancy, optionality, learning from failure, etc.). -
Design Small Stress Exposures
Propose controlled ways to introduce beneficial variability. -
Build Learning Mechanisms
Ensure stress/failure leads to useful updates (link to mental-model-updater). -
Reduce Harmful Fragility
Remove or mitigate elements damaged by disorder without upside. -
Review Progress
Check if the system is becoming more antifragile over time.
Key Principles
- Antifragility > Resilience.
- Small, frequent stressors are often better than rare large ones.
- Learning from failure is the main mechanism.
- Optionality and redundancy help.
Integration
- Works with crisis-manager (turning crises into growth opportunities).
- Feeds into mental-model-updater.
- Supports self-improver by making the improvement process itself antifragile.
Output Style
Be practical. Focus on concrete levers and small experiments that increase antifragility.
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.
- 1mo ago First seen · 46 lines · 76 tokens per session scan A 688c43674e06
antifragility-builder is a skill published in the GitHub repository rrpauls/hermes-esra (1 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 76 tokens to every session and 406 once invoked, about $0.0003 per session on Opus 5.5. 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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