What is semversioner AGENTS.md?

A set of contribution instructions for Semversioner, a Python command-line tool that manages software versions and changelogs. It explains the project's structure, dependencies, and development practices.

Use it when adding features, fixing bugs, testing, or preparing releases in the Semversioner codebase.

It gives coding agents the project context they need before changing code, reducing mistakes caused by unfamiliar conventions or release workflows.

How raulgomis/semversioner configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to raulgomis/semversioner. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/raulgomis/semversioner/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/raulgomis/semversioner

Made for: Codex, OpenCode.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/raulgomis/semversioner/agents-md/github.svg)](https://agentmods.dev/instructions/raulgomis/semversioner/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/raulgomis/semversioner/agents-md"><img src="https://agentmods.dev/badge/instructions/raulgomis/semversioner/agents-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/raulgomis/semversioner/agents-md"><img src="https://agentmods.dev/badge/instructions/raulgomis/semversioner/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,250 This file is loaded in full into every session.

When invoked 1,250 The same file — it is already loaded in full.

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.

Model	Per session	Once invoked
Fable 5.1	$0.01250	$0.01250
Opus 5.5	$0.00500	$0.00500
Sonnet 5.5	$0.00250	$0.00250
Haiku 4.5	$0.00125	$0.00125

Measured 2mo ago against content hash 2488d8f50682, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

semversioner AGENTS.md 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 2mo 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.md · 65 lines

How it starts

The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Semversioner - AI Agent Guidelines

This document provides a comprehensive overview of the semversioner project to help AI agents (and human developers) understand the architecture, coding standards, and development workflows when contributing to the codebase.

1. Project Overview

semversioner is a Python CLI tool designed to simplify semantic versioning and changelog generation. It automates the semver release process for projects, utilizing a specific directory structure (.semversioner/) to track changes over time and aggregate them into single versioned releases.

The tool uses a workflow where individual "changesets" are created during development (e.g., patch, minor, major) and stored as JSON files. During a release, these changesets are merged into a single release JSON file, and a changelog can be generated from these release records using Jinja2 templates.

2. Tech Stack & Dependencies

Language: Python >= 3.10
CLI Framework: click
Templating: jinja2 (for changelog generation)
Versioning parsing: packaging
Build System: setuptools (pyproject.toml based)
Linting & Formatting: ruff
Testing: pytest, pytest-cov

3. Architecture & Core Components

The codebase is structured to separate concerns between the CLI interface, the business logic, storage, and data models:

semversioner/cli.py: The entry point for the CLI commands (e.g., add-change, release, changelog, status, next-version, current-version, check). It parses user inputs using click and delegates execution to the core layer.
semversioner/core.py: The main business logic layer containing the Semversioner orchestrator class. It coordinates actions between the CLI and the storage layer, handles version incrementing logic, and formats the changelog using Jinja2 templates.
semversioner/models.py: Data representations using Python dataclasses (e.g., Changeset, Release, ReleaseStatus).
semversioner/storage.py: Handles file system interactions. Uses an abstract SemversionerStorage class with a concrete SemversionerFileSystemStorage implementation. It creates JSON changesets in the .semversioner/next-release/ directory and aggregates them into versioned JSON files in .semversioner/.

Read the full file on GitHub · 65 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.

2mo ago First seen · 65 lines · 1,250 tokens per session scan A 2488d8f50682

Subscribe to this mod's changes

semversioner AGENTS.md is an instructions file published in the GitHub repository raulgomis/semversioner (48 stars, last pushed 3mo ago), licensed MIT. It adds 1,250 tokens to every session, about $0.0050 per session on Opus 5.5. 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.

ai ai-agents cicd semver versioning

semversioner AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
semversioner AGENTS.mdraulgomis/semversioner	Instructions file	48	3mo ago	MIT	A	1,250	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

semversioner: Instructions file for Codex