semver-review

semver-review is a skill for Claude Code from LenoSeibert/semver-plugin. It costs 55 tokens per session (316 once invoked), scanned A, original, MIT.

A review guide for checking whether a diff, changelog, pull request, or release plan follows Semantic Versioning 2.0.0.

In plain words
What is it for?
Use it during release reviews to inspect public interfaces, identify compatibility risks, verify version formatting, and recommend a version bump.
Why use it?
It separates breaking changes from compatible features, fixes, and internal work so the smallest safe version increase can be chosen.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the semver-plugin plugin — 4 skills, 3 hooks shipped together

Good fit Use it during release reviews to inspect public interfaces, identify compatibility risks…

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/lenoseibert/semver-plugin/semver-review
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.

Any agent
npx skills add LenoSeibert/semver-plugin --skill semver-review
Clone the repo
git clone --depth 1 https://github.com/LenoSeibert/semver-plugin

Made for: Claude Code.

Or install semver-plugin, the plugin that ships this one along with the rest of its 4 skills, 3 hooks.

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 semver-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/lenoseibert/semver-plugin/semver-review.svg)](https://agentmods.dev/skills/lenoseibert/semver-plugin/semver-review)
Your own site
<a href="https://agentmods.dev/skills/lenoseibert/semver-plugin/semver-review"><img src="https://agentmods.dev/badge/skills/lenoseibert/semver-plugin/semver-review.svg" alt="Measured on agentmods" height="20"></a>
Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 316 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00055 $0.00316
Opus 5 $0.00028 $0.00158
Sonnet 5 $0.00011 $0.00063
Haiku 4.5 $0.00006 $0.00032

Measured 6d ago against content hash 5eea3341dea7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

semver-review 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 6d 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.

skills/semver-review/SKILL.md · 32 lines

What it actually says

SemVer Release Review

Inspect the public API definition and the actual changes. Include documented interfaces such as libraries, CLIs, protocols, file formats, configuration, schemas, and observable behavior when consumers can depend on them.

Review

  1. Identify the current released version and public API boundary.
  2. List consumer-visible changes, separating incompatible changes, backward-compatible features/deprecations, fixes, and internal-only work.
  3. Select the highest required bump using SemVer 2.0.0.
  4. Verify that lower components reset, the proposed version has not already been released, and pre-release/build labels are valid when used.
  5. Flag uncertainty when compatibility cannot be established from evidence.

Do not downgrade a bump because a break seems small, optional, or easy to migrate. Do not upgrade a bump merely because the implementation diff is large. Under 0.y.z, report that SemVer permits arbitrary change and evaluate the repository's documented pre-1.0 policy separately.

Output

Lead with Recommendation: <version or bump>. Then give only evidence-backed findings, highest severity first, with file locations when reviewing a repo. End with missing evidence or No SemVer blockers found.

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. 6d ago First seen · 32 lines · 55 tokens per session scan A 5eea3341dea7

Subscribe to this mod's changes

semver-review is a skill published in the GitHub repository LenoSeibert/semver-plugin (1 stars, last pushed 1mo ago), licensed MIT. It adds 55 tokens to every session and 316 once invoked, about $0.0003 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.

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