mitigation-validation

mitigation-validation is a skill for Claude Code, Codex from yogsoth-ai/stress-test. It costs 31 tokens per session (551 once invoked), scanned A, original, Apache-2.0.

A review of proposed safeguards that checks whether the safeguards themselves could fail or create new problems. It reassesses the remaining risk and can send risky measures back for redesign.

In plain words
What is it for?
Use it to test prevention measures, detection checks, and response plans before accepting them.
Why use it?
It helps prevent a risk-reduction plan from introducing another serious failure.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents.

Good fit Use it to test prevention measures, detection checks, and response plans before accepting them.

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Install with agentmods
npx agentmods add skills/yogsoth-ai/stress-test/mitigation-validation
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 yogsoth-ai/stress-test --skill mitigation-validation
Clone the repo
git clone --depth 1 https://github.com/yogsoth-ai/stress-test

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 mitigation-validation

README.md
[![agentmods](https://agentmods.dev/badge/skills/yogsoth-ai/stress-test/mitigation-validation/github.svg)](https://agentmods.dev/skills/yogsoth-ai/stress-test/mitigation-validation)
Your own site
<a href="https://agentmods.dev/skills/yogsoth-ai/stress-test/mitigation-validation"><img src="https://agentmods.dev/badge/skills/yogsoth-ai/stress-test/mitigation-validation/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 mitigation-validation

Your own site · 80×15
<a href="https://agentmods.dev/skills/yogsoth-ai/stress-test/mitigation-validation"><img src="https://agentmods.dev/badge/skills/yogsoth-ai/stress-test/mitigation-validation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 551 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.
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 $0.00031 $0.00551
Opus 5 $0.00015 $0.00275
Sonnet 5 $0.00006 $0.00110
Haiku 4.5 $0.00003 $0.00055

Measured 7d ago against content hash b6593e0ed7db, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

mitigation-validation 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 7d 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.

skills/mitigation-validation/SKILL.md · 69 lines

How it starts

The opening of the file, as written. The whole thing — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mitigation Validation Tactic

Validate that proposed mitigations do not introduce new failure modes — a mini-FMEA on the mitigations themselves.

Orchestration

  1. Receive proposed mitigation measures from mitigation-design-sop
  2. failure-mode-extraction identifies potential failure modes of each mitigation:
    • Could the prevention measure fail?
    • Could the detection mechanism produce false negatives?
    • Could the response plan create new problems?
  3. severity-scoring rates new failure modes
  4. If any new mode scores H-priority:
    • Flag mitigation as risky
    • mitigation-design-sop redesigns or adds safeguards
    • Re-validate (max 2 iterations to prevent infinite loops)
  5. re-scoring confirms final S/O/D with validated mitigations

Iteration Control

  • Max validation iterations: 2 (prevent infinite recursion)
  • If still H-priority after 2 iterations: escalate to human review
  • Document residual risk for accepted mitigations

Subagents Dispatched

  • failure-mode-extraction (mitigation failure identification)
  • severity-scoring (new risk assessment)
  • mitigation-design-sop (redesign if needed)
  • re-scoring (final confirmation)

Termination Conditions

  • All mitigations validated as not introducing H-priority risks
  • Max iterations reached (escalate with documentation)
  • Residual risk accepted and documented

Available SOPs

Optional, no fixed order; the final leaf is always a sop.

SOP When to use
failure-mode-extraction Extract structured failure mode list from raw scenarios or artifact analysis. Produces standardized failure mode records.
mitigation-design-sop Design prevention, detection, and response measures for high-priority failure modes. Produces actionable countermeasure specifications.
re-scoring Re-evaluate S/O/D scores after mitigation measures are in place. Validates that mitigations actually reduce risk as expected.
severity-scoring Rate failure mode severity 1-10 based on end-effect impact. Follows AIAG-VDA severity scale calibrated for research artifacts.

Read the full file on GitHub · 69 lines

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. 7d ago First seen · 69 lines · 31 tokens per session scan A b6593e0ed7db

Subscribe to this mod's changes

mitigation-validation is a skill published in the GitHub repository yogsoth-ai/stress-test (2 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 31 tokens to every session and 551 once invoked, about $0.0002 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 2026-09-03.

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