neon-branch-per-session

neon-branch-per-session is a plugin for Claude Code from davila7/claude-code-templates. Its token cost is not measured, scanned A, original, MIT.

A database-isolation add-on that creates a separate Neon branch for each coding session. Neon is a hosted PostgreSQL service, and a branch is an independent database copy for safe changes.

In plain words
What is it for?
Use it when an agent needs to migrate, seed, or deliberately alter a database during a session. Branches can expire automatically or be deleted when the session ends.
Why use it?
Migrations, test data, and mistakes stay away from production data, while the session receives its branch through the DATABASE_URL environment variable.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest. Also seen: mentions Claude Code.

Good fit Use it when an agent needs to migrate, seed, or deliberately alter a database during a session. Branches can expire automatically or be deleted when the session ends.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add davila7/claude-code-templates
/plugin install neon-branch-per-session
About the project

Claude Code Templates is a command-line tool and catalogue for configuring Anthropic’s Claude Code with agents, commands, settings, hooks, integrations, skills, and project templates. Developers use it to browse and install reusable components for their coding workflows. The catalogue includes many of these Claude Code components.

davila7/claude-code-templates · 32,694 stars · on GitHub · aitmpl.com

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/davila7/claude-code-templates

Made for: Claude Code.

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 neon-branch-per-session

README.md
[![agentmods](https://agentmods.dev/badge/plugins/davila7/claude-code-templates/neon-branch-per-session/github.svg)](https://agentmods.dev/plugins/davila7/claude-code-templates/neon-branch-per-session)
Your own site
<a href="https://agentmods.dev/plugins/davila7/claude-code-templates/neon-branch-per-session"><img src="https://agentmods.dev/badge/plugins/davila7/claude-code-templates/neon-branch-per-session/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 neon-branch-per-session

Your own site · 80×15
<a href="https://agentmods.dev/plugins/davila7/claude-code-templates/neon-branch-per-session"><img src="https://agentmods.dev/badge/plugins/davila7/claude-code-templates/neon-branch-per-session.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
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.
Security

Grade A, and why

neon-branch-per-session 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 12d 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.

cli-tool/components/mods/integrations/neon-branch-per-session/.claude-plugin/plugin.json · 89 lines

How it starts

The opening of the file, as written. The whole thing — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.

{
  "name": "neon-branch-per-session",
  "version": "0.1.0",
  "description": "A Neon database branch for each Claude Code session: created from your default (or chosen) branch when the session starts, handed to every command Claude runs as DATABASE_URL, and set to expire on its own (or deleted when the session ends). Claude can migrate, seed and break the branch without touching production data. /neon shows it, keeps it or deletes it. Needs a Neon API key.",
  "author": {
    "name": "claude-code-templates",
    "url": "https://www.aitmpl.com"
  },
  "repository": "https://github.com/davila7/claude-code-templates",
  "license": "MIT",
  "keywords": [
    "mod",
    "function-hooks",
    "integrations",
    "neon",
    "postgres",
    "database",
    "branching"
  ],
  "userConfig": {
    "neonApiKey": {
      "type": "string",
      "title": "Neon API key",
      "description": "A Neon API key (console.neon.tech, Account settings, API keys); with none set the mod does nothing. Prefer a key scoped to one project",
      "default": "",
      "sensitive": true
    },
    "projectId": {
      "type": "string",
      "title": "Neon project id",
      "description": "The project to branch (project settings in the Neon console); with none set the mod does nothing",
      "default": ""
    },
    "parentBranchId": {
      "type": "string",
      "title": "Parent branch id",
      "description": "Branch id (br-...) to branch from; empty branches from the project's default branch",
      "default": ""
    },
    "database": {
      "type": "string",
      "title": "Database name",
      "description": "Database the connection string points at",
      "default": "neondb"
    },
    "role": {
      "type": "string",
      "title": "Role name",
      "description": "Role the connection string logs in as",
      "default": "neondb_owner"
    },
    "pooled": {
      "type": "boolean",
      "title": "Pooled connection",
      "description": "Use the pooled (PgBouncer) connection

Read the full file on GitHub · 89 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. 12d ago Changed 9322d62bc94a
  2. 15d ago First seen · 89 lines scan A 2dc94e88017c

Subscribe to this mod's changes

neon-branch-per-session is a plugin published in the GitHub repository davila7/claude-code-templates (32,694 stars, last pushed today), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-10-02.