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semver-plugin: Instructions file for Claude Code

CLAUDE.md

semver-plugin CLAUDE.md is an instructions file for Claude Code from LenoSeibert/semver-plugin. It costs 1,173 tokens per session, scanned A, original, MIT.

Project instructions for a portable Semantic Versioning rule pack used by several coding-agent tools. They describe the files, hooks, validation commands, and rules that keep the pack consistent.

In plain words
What is it for?
Use them when modifying the rule pack, its hooks, translations, plugin files, skills, or validation and test commands.
Why use it?
They show which file is authoritative and how changes affect every supported agent setup. They also provide checks for version files, translations, plugins, skills, and installation scripts.

Instructions file for Claude Code

Written for Claude Code: SessionStart hook event. Also seen: mentions .claude-plugin; mentions CLAUDE.md; mentions Claude Code.

This is LenoSeibert/semver-plugin's own configuration. It tells Claude Code how to work on semver-plugin itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything semver-plugin configures →

Runs only inside a plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else, and the catalogue could not identify which plugin ships it.

not rated 1repo 3mo ago A scan 1,173 tokens original MIT
View source ↗ LenoSeibert/semver-plugin
Reuse

Borrowing it

Nothing to install: this file belongs to LenoSeibert/semver-plugin. 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/LenoSeibert/semver-plugin/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/LenoSeibert/semver-plugin

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/lenoseibert/semver-plugin/claude-md"><img src="https://agentmods.dev/badge/instructions/lenoseibert/semver-plugin/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,173 This file is loaded in full into every session.
When invoked 1,173 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01173 $0.01173
Opus 5.5 $0.00469 $0.00469
Sonnet 5.5 $0.00235 $0.00235
Haiku 4.5 $0.00117 $0.00117

Measured 2mo ago against content hash edb009d1914b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

semver-plugin CLAUDE.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.

CLAUDE.md · 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.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

What this repository ships

A portable Semantic Versioning 2.0.0 rule pack for five agent harnesses (Codex, Claude Code, Gemini CLI, GitHub Copilot CLI, OpenCode/Cursor). The product is Markdown and JSON, not a library. There is no build and no test suite.

AGENTS.md is the single source of the rule text: hooks/semver-context.js injects it as session context, gemini-extension.json declares it as the context file, and OpenCode/Cursor users copy it directly. Editing it changes behavior in every harness at once.

Commands

  • make validate — runs validate-version, validate-translations, validate-plugin, validate-skills, check-diff.
  • make test — smoke-tests scripts/install-local.sh with stubbed harness CLIs and --dry-run, asserting on the snapshot it builds. No harness is touched.
  • make validate-plugin and make validate-skills shell out to scripts outside this repo under $HOME/.codex/skills/.system/. They fail without Codex installed; override with PLUGIN_CREATOR_ROOT / SKILL_CREATOR_ROOT.
  • After changing skills/ or hooks/: run make validate, then make install-local and open a fresh session in the target harness to confirm the context injection actually landed. Static validation alone does not prove a hook works.
  • make lint — markdownlint-cli2 (via npx, needs network) plus shellcheck on scripts/*.sh. Kept out of make validate so validation stays offline; CI runs both.
  • make remove-local uninstalls from every harness.

Versioning invariants

  • VERSION and four manifests must be byte-identical: .codex-plugin/plugin.json, .github/plugin/plugin.json, .claude-plugin/plugin.json, gemini-extension.json. scripts/check-version.js fails CI when they drift. This is the most common way to break the build.
  • VERSION never carries a leading v; git tags do (v0.2.6).
  • Pre-1.0 policy for this repo, also stated in README.md: a breaking change to a published contract (hook event/command shape, skill name or frontmatter, manifest keys, dropping a harness) bumps MINOR; everything else bumps PATCH.
  • Every merge into main requires a version bump, docs-only changes included.
  • The bump is its own commit: chore(release): bump version to X.Y.Z.
  • .github/workflows/release.yml tags and publishes on push to main. It fails on purpose when vX.Y.Z already points at another commit — bump again rather than moving a released tag.

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. 2mo ago First seen · 89 lines · 1,173 tokens per session scan A edb009d1914b

Subscribe to this mod's changes

semver-plugin CLAUDE.md is an instructions file published in the GitHub repository LenoSeibert/semver-plugin (1 stars, last pushed 3mo ago), licensed MIT. It adds 1,173 tokens to every session, about $0.0047 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 2026-08-31.

Claude CodeGit and workflowReleasesai-agentscodexcoding-agentsdeveloper-toolsgemini-cli
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