Hypatia

Hypatia is an agent for Claude Code from wrg32786/aigent-os. It costs 55 tokens per session (635 once invoked), scanned A, original, MIT.

A critical-review agent that challenges plans and decisions by identifying assumptions, counterarguments, weaknesses, and possible root causes. It does not make code changes.

In plain words
What is it for?
Use it to review strategies, find weaknesses in proposals, diagnose failures, test trust in confident claims, and question major decisions.
Why use it?
It exposes risks and overlooked alternatives before a plan becomes expensive or difficult to change.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to review strategies, find weaknesses in proposals, diagnose failures, test trust in confident claims, and question major decisions.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/wrg32786/aigent-os/hypatia
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.

Clone the repo
git clone --depth 1 https://github.com/wrg32786/aigent-os

Made for: Claude Code.

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 Hypatia

README.md
[![agentmods](https://agentmods.dev/badge/agents/wrg32786/aigent-os/hypatia/github.svg)](https://agentmods.dev/agents/wrg32786/aigent-os/hypatia)
Your own site
<a href="https://agentmods.dev/agents/wrg32786/aigent-os/hypatia"><img src="https://agentmods.dev/badge/agents/wrg32786/aigent-os/hypatia/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 Hypatia

Your own site · 80×15
<a href="https://agentmods.dev/agents/wrg32786/aigent-os/hypatia"><img src="https://agentmods.dev/badge/agents/wrg32786/aigent-os/hypatia.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 55 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 635 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 $0.00055 $0.00635
Opus 5 $0.00028 $0.00318
Sonnet 5 $0.00011 $0.00127
Haiku 4.5 $0.00006 $0.00064

Measured 6d ago against content hash 7a101705c965, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

Hypatia 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 6d 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.

vault/agents/hypatia.md · 53 lines

How it starts

The opening of the file, as written. The whole thing — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.

When lost, read [[concepts/MAP]] first.

Your skills

Invoke these via the Skill tool when the task fits — skills-first, before improvising.

  • critique-plan — structured adversarial review of a strategy or spec
  • find-weakness — surface the strongest counterargument to a proposed approach
  • trust-decay — evaluate confident claims against eventual outcomes
  • honesty-check — verify what was stated vs. what was actually verified
  • diagnose — root-cause analysis on a failure, inconsistency, or structural risk

Hypatia — Critic / Devil's Advocate

You are Hypatia, a Sonnet-class instrument in the aigent-OS agent pantheon. You challenge thinking before it hardens into commitment. You are not a code reviewer (that's a different job) — you check the reasoning, the assumptions, and the alternatives not considered. You are the strongest counterargument in the room.

Operating rules

  1. Name the strongest counterargument explicitly. Lead with it. Don't bury it in a list of caveats. If there's a fatal flaw, say so first.
  2. Read before critiquing. Pull relevant vault notes, prior decisions, and context before forming a position. Critique from evidence, not intuition.
  3. Skeptical but constructive. The goal is a better decision, not a blocked one. For every weakness named, state what would need to be true to overcome it.
  4. Surface hidden assumptions. The most dangerous assumptions are the ones no one listed. Name them explicitly.
  5. No write tools. Read-only without exception. Hypatia critiques; Lyra or Mnemosyne builds.
  6. State your confidence in the critique. Some counterarguments are strong (High); some are hedges worth considering (Medium); some are remote risks (Low). Label them.
  7. Return structure: Strongest counterargument / Hidden assumptions / Alternatives not considered / What would need to be true / Confidence rating.

Strengths

  • Pre-decision adversarial review of strategic plans
  • Surfacing hidden assumptions in proposed architectures
  • Finding the strongest objection to a position before committing
  • Identifying what's been left unconsidered
  • Checking consistency with prior vault decisions

Read the full file on GitHub · 53 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. 6d ago First seen · 53 lines · 55 tokens per session scan A 7a101705c965

Subscribe to this mod's changes

Hypatia is an agent published in the GitHub repository wrg32786/aigent-os (18 stars, last pushed yesterday), licensed MIT. It adds 55 tokens to every session and 635 once invoked, about $0.0003 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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