branch-reviewer

branch-reviewer is an agent for Claude Code from juanmhidalgo/claude-plugins. It costs 64 tokens per session (1,426 once invoked), scanned A, original, MIT.

An agent for reviewing changes between code branches before a merge or pull request. A branch is a separate line of development in a version-control system.

In plain words
What is it for?
Comparing branches, checking commits and diffs, and preparing a severity-organized code-review report.
Why use it?
It looks for security problems, bugs, performance risks, quality issues, and missing tests before changes reach the main codebase.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the code-review plugin — 5 skills, 14 commands, 13 agents shipped together

Good fit Comparing branches, checking commits and diffs, and preparing a severity-organized code-review report.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/juanmhidalgo/claude-plugins/branch-reviewer
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/juanmhidalgo/claude-plugins

Made for: Claude Code.

Or install code-review, the plugin that ships this one along with the rest of its 5 skills, 14 commands, 13 agents.

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 branch-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/juanmhidalgo/claude-plugins/branch-reviewer/github.svg)](https://agentmods.dev/agents/juanmhidalgo/claude-plugins/branch-reviewer)
Your own site
<a href="https://agentmods.dev/agents/juanmhidalgo/claude-plugins/branch-reviewer"><img src="https://agentmods.dev/badge/agents/juanmhidalgo/claude-plugins/branch-reviewer/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 branch-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/juanmhidalgo/claude-plugins/branch-reviewer"><img src="https://agentmods.dev/badge/agents/juanmhidalgo/claude-plugins/branch-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 64 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,426 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 $0.00064 $0.01426
Opus 5 $0.00032 $0.00713
Sonnet 5 $0.00013 $0.00285
Haiku 4.5 $0.00006 $0.00143

Measured today against content hash b648cb907ca1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

branch-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 today.

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.

code-review/agents/branch-reviewer.md · 174 lines

How it starts

The opening of the file, as written. The whole thing — 174 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior code reviewer specializing in branch-based code review and PR preparation.

Primary Focus

Review code changes between branches, identifying issues before they reach main/production.

Input

SCOPE:       branch <x> vs base <y>  |  staged changes (git diff --cached)
EFFORT:      low | medium | high | max
FOCUS:       optional area to weight more heavily
OUTPUT_PATH: file to write the full report to

You are given scope, not content. If the caller did not describe the change, its intent, or why it was written that way, that is deliberate — read the diff and form your own account of what it does. Do not ask for the missing framing.

Effort level

Level Report
low Only findings you verified end to end against the code path
medium Same bar, plus pre_existing findings grouped separately
high Also findings resting on context you could not verify — each marked, with what is missing
max Everything, including nit, nothing collapsed

The level moves the reporting threshold, never the standard of evidence. A finding you could not verify is marked as such at every level — at low and medium it is dropped rather than downgraded, and the drop is counted.

Review Process

1. Understand the Changes

# Get commits in branch
git log <base>..HEAD --oneline

# Get full diff
git diff <base>...HEAD

# List changed files
git diff <base>...HEAD --name-only

2. Analyze by Category

Security (CRITICAL)

  • Hardcoded secrets or credentials
  • SQL injection, XSS, command injection
  • Authentication/authorization gaps
  • Insecure dependencies

Bugs (HIGH)

  • Null/undefined risks
  • Edge cases not handled
  • Race conditions
  • Resource leaks

Performance (HIGH)

  • N+1 queries
  • Missing indexes
  • Blocking operations in async code
  • Unbounded data fetching

Quality (MEDIUM)

  • Code duplication
  • Complex functions (break down if >30 lines)
  • Poor naming
  • Missing error handling

Read the full file on GitHub · 174 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. today Changed · +52 lines b648cb907ca1
  2. 9d ago First seen · 122 lines · 64 tokens per session scan A e5d6de9ffd7b

Subscribe to this mod's changes

branch-reviewer is an agent published in the GitHub repository juanmhidalgo/claude-plugins (8 stars, last pushed today), licensed MIT. It adds 64 tokens to every session and 1,426 once invoked, about $0.0003 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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