kotlin-specialist

kotlin-specialist is a skill for Claude Code from acaprino/daodan. It costs 89 tokens per session (2,202 once invoked), scanned A, a copy of kotlin-specialist, MIT.

A specialist guide for writing and reviewing Kotlin code, including coroutines, shared code for multiple platforms, and Compose user interfaces. Kotlin is a programming language, and coroutines are a way to manage asynchronous work.

In plain words
What is it for?
It supports Kotlin Multiplatform code, Ktor APIs, Compose screens and view models, tests, and checks with detekt and ktlint.
Why use it?
It helps prevent common problems such as unfinished asynchronous work, unsafe null handling, and style-check failures in Kotlin projects.

Skill for Claude Code

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

Part of the kotlin-development plugin — 1 skill shipped together

Good fit It supports Kotlin Multiplatform code, Ktor APIs, Compose screens and view models, tests, and checks with detekt and ktlint.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/acaprino/daodan/kotlin-specialist
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 acaprino/daodan --skill kotlin-specialist
Clone the repo
git clone --depth 1 https://github.com/acaprino/daodan

Made for: Claude Code.

Or install kotlin-development, the plugin that ships this one along with the rest of its 1 skill.

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-specialist

README.md
[![agentmods](https://agentmods.dev/badge/skills/acaprino/daodan/kotlin-specialist/github.svg)](https://agentmods.dev/skills/acaprino/daodan/kotlin-specialist)
Your own site
<a href="https://agentmods.dev/skills/acaprino/daodan/kotlin-specialist"><img src="https://agentmods.dev/badge/skills/acaprino/daodan/kotlin-specialist/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 kotlin-specialist

Your own site · 80×15
<a href="https://agentmods.dev/skills/acaprino/daodan/kotlin-specialist"><img src="https://agentmods.dev/badge/skills/acaprino/daodan/kotlin-specialist.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 89 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,202 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 86% copy Near-identical to another mod 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 $0.00089 $0.02202
Opus 5.5 $0.00036 $0.00881
Sonnet 5.5 $0.00018 $0.00440
Haiku 4.5 $0.00009 $0.00220

Measured today against content hash 53dd4aaa2120, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

kotlin-specialist 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 today.

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.

Origin

This is a copy

86% identical to kotlin-specialist — 109 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

exports/claude/plugins/kotlin-development/skills/kotlin-specialist/SKILL.md · 218 lines

How it starts

The opening of the file, as written. The whole thing — 218 lines — stays where its author put it; the contents beside it link to each section on GitHub.

<daodan_host_binding host="claude"> This binding governs execution of this package and its loaded references. It takes precedence over executable examples written for another host. Use only registered tools and their actual input schema; an example never creates a tool, argument, permission, model alias or nested worker capability. Preserve the generated worker allowlist, dependency closure, scope and delivery contracts.

Claude binding: repository tools are Read/Glob/Grep and Write/Edit; shell execution uses Bash and network fetch uses WebFetch. Pass the executable string in Bash's command field, and use its registered timeout/background schema. Worker dispatch uses the available native Agent mechanism and its registered agent-selection and prompt fields. Do not turn a prose role label into an invented role argument. Inherit the session model unless the declared workflow and active schema permit an override. Load installed skills by qualified ID; named roles use their owning plugin's agent identity, while workflow entries use /:. Required foreign providers use Claude's marketplace/install commands: claude plugin marketplace add , then claude plugin install @. A provider that is installed but disabled is enabled with claude plugin enable @; check claude plugin list --json before the first phase, and stop with that command when any plugin of this package's dependency closure, direct or transitive, is off. A declared package MCP server is configured through the generated MCP manifest; still check its tools are actually available in the active session.

The executing agent and its coordinator own continuation, recovery, verification and delivery. Skills supply knowledge and method instructions; they are not executors or a runtime persistence mechanism.

Resolve each component by kind and exact installed identity. A role is dispatched as a worker, a skill loads instructions, and a workflow starts its declared method. Kernel owner-qualified skill references are logical provider identities: resolve them to the actual host registry name and verified installed provider path. Do not invent a registry string by adding an owner's prefix when the host does not use it. Do not load an agent identity as a skill or execute a workflow name as a shell command. Declared required foreign providers remain mandatory. If a required provider or capability (including required MCP access or isolation) is unavailable, stop its dependent phase and report the missing capability. Optional external providers follow the method's declared selection and absence behavior; their absence alone does not block the base workflow. Report any explicitly requested but unavailable provider contribution as unfulfilled and continue independent work. Do not install a different host's plugin or substitute unrelated skills to claim coverage.

Shell execution alone does not establish interactive stdin. Before a capture or checkpoint, use an available session-control mechanism. When stdin is unavailable, keep user-driven capture in a supported background process with bounded output and an explicit stop signal controlled by the coordinator after the user's completion message. Close owned browser/process resources on completion or cancellation.

Continue working within the current authorization while the requested result is achievable. After a tool error, inspect its cause, correct the relevant input or implementation, retry when justified and verify the outcome; never repeat a failing action blindly. Do not close the turn with a promise or a partial result when an authorized next step can still produce or verify the requested result. Stop only for a documented real impediment, a missing required capability, an unresolved human decision or the caller's stop request. At that boundary, report completed results, remaining work and the concrete prerequisite for continuation; continue any independent work that the blocker does not prevent.

Read the full file on GitHub · 218 lines

Files

What ships with it

6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. today Changed · +4 lines 53dd4aaa2120
  2. 7d ago Changed · +4 lines 18b74d01dca2
  3. 11d ago Changed · -23 tokens per session f4de13b61205
  4. 15d ago Changed · +64 lines b1f2d38109be
  5. 1mo ago First seen · 146 lines · 112 tokens per session scan A 37e6c2b09571

Subscribe to this mod's changes

kotlin-specialist is a skill published in the GitHub repository acaprino/daodan (9 stars, last pushed today), licensed MIT. It adds 89 tokens to every session and 2,202 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 86% identical to kotlin-specialist, differing in 109 lines, and is treated as a copy.

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