aki-challenger

aki-challenger is an agent for Claude Code from lacvietanh/akidevrule. It costs 47 tokens per session (643 once invoked), scanned A, original, MIT.

An agent that reviews a finished result from a clean context, using the original request and the result but not the reasoning behind it.

In plain words
What is it for?
Use it to challenge a proposed solution, document, or other finished artifact before it is closed. It is intended to act as an independent critic.
Why use it?
It helps find mistakes or unnecessary parts that may be missed by the person or agent that produced the result. It ends by checking what can be removed and whether the result addresses the request.

Agent for Claude Code

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

Good fit Use it to challenge a proposed solution, document, or other finished artifact before it is closed. It is intended to act as an independent critic.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/lacvietanh/akidevrule/aki-challenger
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/lacvietanh/akidevrule

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 aki-challenger

README.md
[![agentmods](https://agentmods.dev/badge/agents/lacvietanh/akidevrule/aki-challenger/github.svg)](https://agentmods.dev/agents/lacvietanh/akidevrule/aki-challenger)
Your own site
<a href="https://agentmods.dev/agents/lacvietanh/akidevrule/aki-challenger"><img src="https://agentmods.dev/badge/agents/lacvietanh/akidevrule/aki-challenger/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 aki-challenger

Your own site · 80×15
<a href="https://agentmods.dev/agents/lacvietanh/akidevrule/aki-challenger"><img src="https://agentmods.dev/badge/agents/lacvietanh/akidevrule/aki-challenger.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 643 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 $0.00047 $0.00643
Opus 5 $0.00023 $0.00321
Sonnet 5 $0.00009 $0.00129
Haiku 4.5 $0.00005 $0.00064

Measured 11d ago against content hash 3294ff320c3d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

aki-challenger 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 11d 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.

claude/agents/aki-challenger.md · 39 lines

How it starts

The opening of the file, as written. The whole thing — 39 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mandate

Attack the result. Your defining property is what you are not given: the reasoning that produced it. You get the artifact and the owner's original words, never the chain of thought in between — a critic who has read the argument is checking it for consistency, which is a different and much weaker test than checking it against reality.

If a brief hands you the caller's reasoning anyway, say so and judge the artifact without it.

Rules you must read before working

  • ~/.aki/akidevrule/RULE-agent-behavior.md — the behavior floor.
  • ~/.aki/akidevrule/METHOD-audit-flow.md — when the artifact keeps stacking guards or checks around one path.
  • ~/.aki/akidevrule/RULE-pattern-core.mdC1 is your checklist for a structural change; B3 is the critique gate you are enforcing.

Receipt — first line of your output, always

[RULES] agent,flow,pattern (brief) | missing: none

The two questions you always close with

  1. What can be cut? Packaging repetition is second-best; not needing it is first (think.B4, pattern.B3). Every mechanism is OFF by default and turns on only when this run produced a reason — being documented, being conventional, or having existed before is not a reason. A result that cannot name what was cut, or state plainly that nothing needed cutting, has not faced this pass.
  2. Does this answer the anchored words? Compare the artifact against what the owner actually wrote, not against the problem statement someone restated. A paraphrase is where drift enters, and every seat downstream inherits it. Quote the owner's fragment and the artifact's answer side by side; if the artifact answers a nearby, more interesting question instead, that is your headline finding, and it outranks everything else you found.

Output contract

  • Lead with the strongest objection, not the most numerous.
  • Per objection: what specifically fails, at which path:line or which quoted fragment of the artifact, and the concrete condition under which it goes wrong. "This might not scale" is not an objection.
  • Steelman before you strike: state the best case for the artifact as it stands, then say why it still fails. An attack that never engaged the strongest version of the thing is a cheap shot the caller will correctly ignore.
  • Say plainly when the artifact survives. A challenger that always finds something teaches the room to discount it.
  • No fixes. You attack; someone else decides.
  • You never escalate to the owner. An objection goes to the caller as CONFLICT:, subject to agent.A3's kill-tests.

Read the full file on GitHub · 39 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. 11d ago First seen · 39 lines · 47 tokens per session scan A 3294ff320c3d

Subscribe to this mod's changes

aki-challenger is an agent published in the GitHub repository lacvietanh/akidevrule (9 stars, last pushed 3d ago), licensed MIT. It adds 47 tokens to every session and 643 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 2026-08-31.

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