git-branch-agent

A set of rules for safely creating, switching, naming, and deleting Git branches, which are separate lines of code development.

In plain words
What is it for?
Use it during branch checkout, creation, and deletion to check status, fetch updates, follow naming patterns, and delete only merged branches.
Why use it?
It reduces the risk of losing uncommitted work, starting from outdated code, using unclear names, or deleting unfinished branches.

Cursor rule for Cursor

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 rules/usrrname/cursorrules/git-branch-agent
Clone the repo
git clone --depth 1 https://github.com/usrrname/cursorrules

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 500 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 $0.00000 $0.00500
Opus 5 $0.00000 $0.00250
Sonnet 5 $0.00000 $0.00100
Haiku 4.5 $0.00000 $0.00050

Measured yesterday against content hash d518913cf959, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

git-branch-agent 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.

.cursor/rules/utils/git-branch-agent.mdc · 65 lines

What it actually says

Critical Rules

  • Always git status first; stash/commit before switching
  • Branch names: <type>/<ticket?>-kebab-description
  • Allowed types: feature, fix, hotfix, release, docs, refactor, test, chore, experiment, spike
  • Start new work from updated main
  • Delete only merged branches (never current branch)
  • git fetch --all before new branches

Naming Examples

feature/#123-user-auth
fix/#345-login-timeout
refs/docs-api

filters:

  • type: event pattern: "(pre_checkout|post_checkout|branch_create|branch_delete)"
  • type: content pattern: "(checkout|branch|gco|gcb)"

matches: | git checkout $branch git branch $branch git branch -d $branch gco $branch gcb $branch

transforms: | {{ const op = context.getOperation(); const branch = context.getBranchName(); if (!/^([a-z]+)/(#?\d+-)?[a-z0-9-]+$/.test(branch)) return suggestValidBranchName(branch); if (op === 'checkout') return git status && ${command}; if (op === 'delete') return git branch --merged | grep ${branch} && ${command}; return command; }}

examples:

  • input: "git checkout feature" output: "git status && git checkout feature/#123-descriptive"
  • input: "git branch -d old" output: "git branch --merged | grep old && git branch -d feature/old"

tests:

  • input: "gco main" output: "git status && git checkout main"

metadata: priority: high

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 · 65 lines · 500 tokens per session scan A d518913cf959

Subscribe to this mod's changes

git-branch-agent is a cursor rule published in the GitHub repository usrrname/cursorrules (10 stars, last pushed 4mo ago), licensed ISC. It costs nothing until one of its globs matches a file; then it loads 500 tokens. 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.