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 AnastasiyaW/codex-claude-code-config --skill epistemic-challengegit clone --depth 1 https://github.com/AnastasiyaW/codex-claude-code-configWrote 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/anastasiyaw/codex-claude-code-config/epistemic-challenge)<a href="https://agentmods.dev/skills/anastasiyaw/codex-claude-code-config/epistemic-challenge"><img src="https://agentmods.dev/badge/skills/anastasiyaw/codex-claude-code-config/epistemic-challenge/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/anastasiyaw/codex-claude-code-config/epistemic-challenge"><img src="https://agentmods.dev/badge/skills/anastasiyaw/codex-claude-code-config/epistemic-challenge.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00077 | $0.00988 |
| Opus 5 | $0.00039 | $0.00494 |
| Sonnet 5 | $0.00015 | $0.00198 |
| Haiku 4.5 | $0.00008 | $0.00099 |
Grade A, and why
epistemic-challenge 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 10d 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.
How it starts
The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Epistemic Challenge
Purpose
Give evidence-bound disagreement when it is warranted, and evidence-bound agreement when it is warranted. The goal is not a "devil's advocate" persona: invented opposition is as misleading as automatic agreement.
When to use
Use for an explicit request for critical independence, a factual premise that would change an implementation or decision, a disputed conclusion, research, or an important recommendation. Do not apply the full protocol to a simple instruction, a preference the user owns, or a fact directly measured in the current tool result.
Procedure
- State the operative claim or decision in a falsifiable form. Separate a user preference (which needs no fact-check) from an empirical claim (which does).
- Collect source-backed evidence before giving a verdict. First prefer a current local observation (code, log, probe) or primary documentation; an explicit user constraint is evidence for a value choice. Memory and prior assistant text are only search leads and must be re-checked before they support a current factual claim. User confidence and a pleasing narrative are not evidence.
- Name the strongest realistic counter-hypothesis and the observation that distinguishes it from the proposed explanation. Do not create a weak counterargument merely to sound critical.
- For research or a consequential decision, verify the discriminator without showing the checker the proposed conclusion when practical. Prefer a fresh reviewer for destructive, production, financial, security, or architectural actions.
- Return one of:
SUPPORTED,REFUTED,INCONCLUSIVE, orVALUE_CHOICE. Say what would change the verdict. Change a conclusion only for new evidence or a corrected inference, not because the user repeats a preference or asks "are you sure?".
Output contract
For a substantive claim, use this compact shape:
Verdict: SUPPORTED | REFUTED | INCONCLUSIVE | VALUE_CHOICE
Evidence: [observed source or command result]
Counterevidence / alternative: [strongest live alternative, or none found]
Boundary: [what was not established]
Next falsifier: [one observation that would change the verdict]
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.
- 10d ago First seen · 90 lines · 77 tokens per session scan A abb6999fc185
epistemic-challenge is a skill published in the GitHub repository AnastasiyaW/codex-claude-code-config (149 stars, last pushed yesterday), licensed MIT. It adds 77 tokens to every session and 988 once invoked, about $0.0004 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 2026-08-30.
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