kotlin-review

kotlin-review is a skill for Claude Code, Codex from Heapy/kortex. It costs 31 tokens per session (1,779 once invoked), scanned A, original, Apache-2.0.

A read-only review workflow for Kotlin tests, architecture, and ABI compatibility. ABI compatibility means code compiled against an earlier library release can still link to it.

In plain words
What is it for?
Reviewing a Kotlin working tree, commit, pull request, or repository with specialised checks.
Why use it?
It separates different review questions so problems in test coverage, future changeability, or published-library compatibility are easier to find.

Skill for Claude CodeCodex

Part of the kotlin-quality plugin — 2 skills, 3 agents shipped together

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 skills/heapy/kortex/kotlin-review
Any agent
npx skills add Heapy/kortex --skill kotlin-review
Clone the repo
git clone --depth 1 https://github.com/Heapy/kortex

Made for: Claude Code, Codex.

Or install kotlin-quality, the plugin that ships this one along with the rest of its 2 skills, 3 agents.

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 kotlin-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/heapy/kortex/kotlin-review.svg)](https://agentmods.dev/skills/heapy/kortex/kotlin-review)
Your own site
<a href="https://agentmods.dev/skills/heapy/kortex/kotlin-review"><img src="https://agentmods.dev/badge/skills/heapy/kortex/kotlin-review.svg" alt="Measured on agentmods" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,779 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 $0.00031 $0.01779
Opus 5 $0.00015 $0.00890
Sonnet 5 $0.00006 $0.00356
Haiku 4.5 $0.00003 $0.00178

Measured 4d ago against content hash 4066dc9af35e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

kotlin-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 4d 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.

plugins/kotlin-quality/skills/kotlin-review/SKILL.md · 158 lines

How it starts

The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Kotlin Review

Route a Kotlin quality review to the right agent, over the right scope, and merge the results into one report. The review criteria live in the agents, not here. This skill decides what to run and reports what came back.

Three agents ship with this plugin:

Agent Question it answers Applies to
kotlin-test-review If every test passes, do we know the code works? any project
kotlin-architecture-review Can this codebase absorb the next change without it spreading? any project
kotlin-abi-review Will code compiled against the last release still link? published libraries only

All three are read-only. None of them edits files or runs a build.

Settle the scope first

Do not start until both of these are fixed. Ask only for what the request leaves open.

1. What to review. One of:

Scope How to get it
working tree git status --short, git diff HEAD, and the contents of every untracked file named by status
a commit git show --name-status --format=fuller <ref> and git show --find-renames --format= <ref>; read candidate files from <ref>, not from the checkout
a pull request git diff --name-status <base>...<head> and git diff --find-renames <base>...<head>; read candidate files from <head>
the whole repository the module list from the build files

Default to the working tree when it is dirty, otherwise to the last commit.

The first three scopes are diff review. Rank only findings introduced or materially worsened by that diff. Read surrounding code for context, but do not turn pre-existing debt into findings. Mention legacy only in an unranked Pre-existing context note when it is necessary to explain the change or blocks a trustworthy verdict. The repository scope is the separate full scan mode.

2. Which review. Tests, architecture, ABI, or a combination.

  • Honor an explicit choice exactly. A request for tests only, for example, does not authorize adding architecture or ABI.
  • Default to tests and architecture when the scope is the repository or a pull request.
  • Default to tests alone when the change touches only test sources.
  • When the review type was not explicit, add ABI for modules that have a real publication or external consumer contract. In Kotlin Toolchain this means product: jvm/lib or kmp/lib together with settings.publishing.enabled; in Gradle it means a library publication configured through maven-publish or a publishing plugin. API dumps, explicitApi(), and ABI-validation configuration support that conclusion but do not prove publication on their own.
  • Never run the ABI review on an application. There is no ABI to keep.

Read the full file on GitHub · 158 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. 4d ago First seen · 158 lines · 31 tokens per session scan A 4066dc9af35e

Subscribe to this mod's changes

kotlin-review is a skill published in the GitHub repository Heapy/kortex (6 stars, last pushed today), licensed Apache-2.0. It adds 31 tokens to every session and 1,779 once invoked, about $0.0002 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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