ferrox-code-review

ferrox-code-review is a skill for Claude Code, Codex from FerroxLabs/ferrox-factory. It costs 21 tokens per session (652 once invoked), scanned A, original, MIT.

A code-review workflow that examines selected changes for bugs, security problems, and quality issues, then writes a severity-ranked report.

In plain words
What is it for?
Use it to review a project phase or specific files at quick, standard, or deep analysis levels, with optional automated fixes.
Why use it?
It provides a repeatable review before code is merged or shipped and can optionally apply fixes and review them again.

Skill for Claude CodeCodex

Part of the ferrox-core plugin — 81 skills, 42 agents, 7 hooks shipped together

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.

agentmods
npx agentmods add skills/ferroxlabs/ferrox-factory/ferrox-code-review
Any agent
npx skills add FerroxLabs/ferrox-factory --skill ferrox-code-review
Clone the repo
git clone --depth 1 https://github.com/FerroxLabs/ferrox-factory

Made for: Claude Code, Codex.

Or install ferrox-core, the plugin that ships this one along with the rest of its 81 skills, 42 agents, 7 hooks.

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 ferrox-code-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/ferroxlabs/ferrox-factory/ferrox-code-review.svg)](https://agentmods.dev/skills/ferroxlabs/ferrox-factory/ferrox-code-review)
Your own site
<a href="https://agentmods.dev/skills/ferroxlabs/ferrox-factory/ferrox-code-review"><img src="https://agentmods.dev/badge/skills/ferroxlabs/ferrox-factory/ferrox-code-review.svg" alt="Measured on agentmods" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 652 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00021 $0.00652
Opus 5 $0.00010 $0.00326
Sonnet 5 $0.00004 $0.00130
Haiku 4.5 $0.00002 $0.00065

Measured yesterday against content hash 5552a5d928a8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ferrox-code-review 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 yesterday.

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/ferrox-code-review/SKILL.md · 60 lines

What it actually says

Spawns the ferrox-code-reviewer agent to analyze code at the specified depth level. Produces REVIEW.md artifact in the phase directory with severity-classified findings.

Arguments:

  • Phase number (required) — which phase's changes to review (e.g., "2" or "02")
  • --depth=quick|standard|deep (optional) — review depth level, overrides workflow.code_review_depth config
    • quick: Pattern-matching only (~2 min)
    • standard: Per-file analysis with language-specific checks (~5-15 min, default)
    • deep: Cross-file analysis including import graphs and call chains (~15-30 min)
  • --files file1,file2,... (optional) — explicit comma-separated file list, skips SUMMARY/git scoping (highest precedence for scoping)
  • --fix (optional) — after review completes (or if REVIEW.md already exists), auto-apply fixes found. Spawns ferrox-code-fixer agent. Accepts sub-flags:
    • --all — include Info findings in fix scope (default: Critical + Warning only)
    • --auto — enable fix + re-review iteration loop, capped at 3 iterations

Output: {padded_phase}-REVIEW.md in phase directory + inline summary of findings

<execution_context> @~/.claude/ferrox-core/workflows/code-review.md </execution_context>

Optional flags parsed from $ARGUMENTS:

  • --depth=VALUE — Depth override (quick|standard|deep). If provided, overrides workflow.code_review_depth config.
  • --files=file1,file2,... — Explicit file list override. Has highest precedence for file scoping per D-08. When provided, workflow skips SUMMARY.md extraction and git diff fallback entirely.

Context files (CLAUDE.md, SUMMARY.md, phase state) are resolved inside the workflow via ferrox-tools query init.phase-op and delegated to agent via <files_to_read> blocks.

Execute end-to-end.

The workflow (not this command) enforces these gates:

  • Phase validation (before config gate)
  • Config gate check (workflow.code_review)
  • File scoping (--files override > SUMMARY.md > git diff fallback)
  • Empty scope check (skip if no files)
  • Agent spawning (ferrox-code-reviewer)
  • Result presentation (inline summary + next steps)
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. yesterday First seen · 60 lines · 21 tokens per session scan A 5552a5d928a8

Subscribe to this mod's changes

ferrox-code-review is a skill published in the GitHub repository FerroxLabs/ferrox-factory (22 stars, last pushed 1mo ago), licensed MIT. It adds 21 tokens to every session and 652 once invoked, about $0.0001 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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