compare-branch

compare-branch is an agent for coding agents from cveralyon/axel-setup. It costs 16 tokens per session (345 once invoked), scanned A, original, MIT.

A review agent that compares your current Git branch with another branch, usually main. It summarizes the changed files and commits, assesses risks, and gives a merge-readiness verdict.

In plain words
What is it for?
Use it to review a branch before merging, compare it with main or staging, check whether database and configuration changes are safe, and identify missing tests or possible merge conflicts.
Why use it?
It gathers the details needed before merging without making the developer inspect every difference manually. It highlights risky changes such as migrations, configuration, dependencies, tests, and security rules.

Agent

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/cveralyon/axel-setup/compare-branch
Clone the repo
git clone --depth 1 https://github.com/cveralyon/axel-setup

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 compare-branch

README.md
[![agentmods](https://agentmods.dev/badge/agents/cveralyon/axel-setup/compare-branch.svg)](https://agentmods.dev/agents/cveralyon/axel-setup/compare-branch)
Your own site
<a href="https://agentmods.dev/agents/cveralyon/axel-setup/compare-branch"><img src="https://agentmods.dev/badge/agents/cveralyon/axel-setup/compare-branch.svg" alt="Measured on agentmods" height="20"></a>
Per session 16 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 345 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 $0.00016 $0.00345
Opus 5 $0.00008 $0.00172
Sonnet 5 $0.00003 $0.00069
Haiku 4.5 $0.00002 $0.00034

Measured 5d ago against content hash 9a491d5de5d2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

compare-branch 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 5d 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.

agents/compare-branch.md · 36 lines

What it actually says

Quick assessment of the current branch compared to a target branch (default: main).

Step 1: Branch State

  • Current branch name and target branch
  • Commits ahead/behind: git rev-list --left-right --count HEAD...origin/main
  • Last common ancestor: git merge-base HEAD origin/main

Step 2: What Changed

  • Files changed: git diff origin/main...HEAD --stat
  • Commits: git log origin/main..HEAD --oneline
  • Group changes by area: models, services, controllers, migrations, frontend, config, tests

Step 3: Risk Assessment

Risk Check
Migration Any new migrations? Reversible? strong_migrations compatible?
Schema Changes to schema.rb? New columns, indexes, constraints?
Config ENV vars changed? Routes changed? Initializers modified?
Dependencies Gemfile/package.json changes?
Tests New specs added? Existing specs modified?
Security Auth/authorization changes? New endpoints exposed?

Step 4: Merge Readiness Verdict

  • GO — Clean, tested, low risk
  • CAUTION — Needs review on specific areas (list them)
  • STOP — Missing tests, risky migration, or unresolved issues

Include any merge conflicts detected: git merge-tree $(git merge-base HEAD origin/main) HEAD origin/main

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. 5d ago First seen · 36 lines · 16 tokens per session scan A 9a491d5de5d2

Subscribe to this mod's changes

compare-branch is an agent published in the GitHub repository cveralyon/axel-setup (4 stars, last pushed 1mo ago), licensed MIT. It adds 16 tokens to every session and 345 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 2026-08-31.