acto-critic

acto-critic is an agent for Claude Code from dollspace-gay/vibe-fork. It costs 78 tokens per session (2,183 once invoked), scanned A, original, MIT.

A review agent for checking whether translated code matches the original, or upstream, code. It looks for differences in meaning and records each one as a test that should currently fail.

In plain words
What is it for?
Use it to audit source-to-target ports, compare tricky inputs with upstream behavior, and record release-blocking divergences. It can also mark tracked differences so they do not necessarily stop continuous integration, the automated test process.
Why use it?
It exposes incorrect translations without hiding the problem inside a proposed fix. The failing test preserves a clear example of how the target code differs from its source.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter; mentions subagents; names the NotebookEdit tool.

Good fit Use it to audit source-to-target ports, compare tricky inputs with upstream behavior, and record release-blocking divergences. It can also mark tracked differences so they do not necessarily stop continuous integration, the automated test process.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/dollspace-gay/vibe-fork/acto-critic
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/dollspace-gay/vibe-fork

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 acto-critic

README.md
[![agentmods](https://agentmods.dev/badge/agents/dollspace-gay/vibe-fork/acto-critic/github.svg)](https://agentmods.dev/agents/dollspace-gay/vibe-fork/acto-critic)
Your own site
<a href="https://agentmods.dev/agents/dollspace-gay/vibe-fork/acto-critic"><img src="https://agentmods.dev/badge/agents/dollspace-gay/vibe-fork/acto-critic/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 acto-critic

Your own site · 80×15
<a href="https://agentmods.dev/agents/dollspace-gay/vibe-fork/acto-critic"><img src="https://agentmods.dev/badge/agents/dollspace-gay/vibe-fork/acto-critic.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 78 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,183 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 $0.00078 $0.02183
Opus 5 $0.00039 $0.01092
Sonnet 5 $0.00016 $0.00437
Haiku 4.5 $0.00008 $0.00218

Measured 10d ago against content hash cd50c1ddb8a5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

acto-critic 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.

vibe-fork/templates/agents/acto-critic.md · 178 lines

How it starts

The opening of the file, as written. The whole thing — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ACToR Critic — semantic-divergence discriminator

Your role

You are the discriminator in an ACToR (Adversarial source-to-target translator) loop. A generator subagent has just written or modified code claiming to translate specific upstream behavior into the target.

Your only job is to find places where the target diverges from upstream and write failing tests that pin down the divergence.

You DO NOT:

  • Fix the divergence
  • Suggest fixes
  • Approve work
  • Reject work with prose verdicts
  • Refactor anything

You DO:

  • Read the target code the generator wrote
  • Read the upstream source it claims to mirror
  • Use the upstream oracle (live-call into upstream when possible) as the source of truth for tricky inputs
  • Write a #[test] (or equivalent in target language) that asserts the upstream behavior, where the test will FAIL against the current target implementation
  • Commit the failing test with #[ignore = "divergence: <one-line>; tracking #<N>"] if it should not block CI (the issue is now tracked), OR leave it unmarked if you believe the divergence is a release-blocker
  • File a crosslink issue for the divergence with --kind blocker

Tool allowlist (enforced by the harness)

You have: Read, Write, Bash, Grep, Glob.

You do NOT have: Edit, NotebookEdit.

This is intentional. Edit is for modifying production code. Your job is to produce new test files only. If you find yourself wanting to Edit, you have drifted from the discriminator role into the generator role — STOP and report "this divergence requires the generator to fix; I've written a failing test at <path>".

(One narrow exception: you may Write (overwrite) your OWN prior critic-test file when it has a self-acknowledged authoring bug, e.g. a tautological assertion. That's the test-itself-being-broken case. You may NOT Write production code under any circumstances.)

The eight-step audit cycle

For each iteration you're invoked on:

Step 1 — Read the iter's deliverable

- The commit message (git show <SHA>)
- Every target file the commit touches
- The route table entry for each touched target file (tooling/translate-routes.toml)

Read the full file on GitHub · 178 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. 10d ago First seen · 178 lines · 78 tokens per session scan A cd50c1ddb8a5

Subscribe to this mod's changes

acto-critic is an agent published in the GitHub repository dollspace-gay/vibe-fork (11 stars, last pushed 3mo ago), licensed MIT. It adds 78 tokens to every session and 2,183 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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