fec-code-reviewer

fec-code-reviewer is an agent for coding agents from bovinphang/frontend-craft. It costs 95 tokens per session (2,278 once invoked), scanned A, original, MIT.

A senior review process for front-end code such as React, Vue, Next, Nuxt, TypeScript, styles, and browser-side security.

In plain words
What is it for?
Use it to review diffs, surrounding code, related tests, components, state, rendering, styles, performance, and client-side security, with findings tied to files and lines.
Why use it?
It turns a code change into an evidence-based review, so defects, maintainability problems, type issues, and user-impacting risks are easier to spot before merging.

Agent

Part of the frontend-craft plugin — 56 skills, 11 commands, 14 agents, 5 hooks, 6 MCP servers 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 agents/bovinphang/frontend-craft/fec-code-reviewer
Clone the repo
git clone --depth 1 https://github.com/bovinphang/frontend-craft

Or install frontend-craft, the plugin that ships this one along with the rest of its 56 skills, 11 commands, 14 agents, 5 hooks, 6 MCP servers.

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 fec-code-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/bovinphang/frontend-craft/fec-code-reviewer.svg)](https://agentmods.dev/agents/bovinphang/frontend-craft/fec-code-reviewer)
Your own site
<a href="https://agentmods.dev/agents/bovinphang/frontend-craft/fec-code-reviewer"><img src="https://agentmods.dev/badge/agents/bovinphang/frontend-craft/fec-code-reviewer.svg" alt="Measured on agentmods" height="20"></a>
Per session 95 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,278 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 $0.00095 $0.02278
Opus 5 $0.00048 $0.01139
Sonnet 5 $0.00019 $0.00456
Haiku 4.5 $0.00010 $0.00228

Measured yesterday against content hash aa87768c7062, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

fec-code-reviewer 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.

agents/fec-code-reviewer.md · 156 lines

How it starts

The opening of the file, as written. The whole thing — 156 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior front-end code reviewer, covering browser-side UI, components, state, style, type, performance and client security; it does not replace the special review of the back-end, but if the changes involve BFF or API routing in the same warehouse, you can mark obvious problems incidentally.

Review process

When called:

First read the project context, relevant diffs, scripts and existing tests, and then give a conclusion. Each discovery must have a file/line number, user impact, confidence level, and recommended verification method; guesses without evidence are placed in open questions, not blocked items.

  1. Collect context — Execute git diff --staged and git diff to view all changes; if there is no diff, use git log --oneline -5 to understand the latest commit.
  2. Understanding Scope — Identify the change files, corresponding functions/defects, and their association with routing, status, and API layers.
  3. Read surrounding code — Don’t look at the diff in isolation: read the complete file, import, caller and related tests.
  4. Check item by item from the list** — Complete the following list from CRITICAL to LOW; only front-end related back-end items (such as entering the key into the client bundle) are processed as CRITICAL.
  5. Output Conclusion — Use the format below; Only report true questions with a confidence level higher than about 80%. Unless the user explicitly requests repair, do not change the business document and only write a review report.

Confidence and noise reduction

  • Report: Confidence > 80% that the defect or risk is real.
  • SKIP: Pure style preference, unless it violates the explicit agreement of the project CLAUDE.md / rules.
  • SKIP: Issues in unchanged code, unless CRITICAL security items (such as hardcoded keys present in the merged code and still in the online path).
  • Merge: Similar issues are merged into one (for example, "Multiple branches lack error handling" instead of listing them line by line).
  • Priority: Items that may lead to bugs, user data leakage, XSS, or architectural issues that are difficult to maintain.

Read the full file on GitHub · 156 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. yesterday Changed · +3 lines aa87768c7062
  2. 5d ago First seen · 153 lines · 95 tokens per session scan A 392247ac536c

Subscribe to this mod's changes

fec-code-reviewer is an agent published in the GitHub repository bovinphang/frontend-craft (21 stars, last pushed 3d ago), licensed MIT. It adds 95 tokens to every session and 2,278 once invoked, about $0.0005 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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