A maintenance procedure for updating the pinned version of the Claude Agent Client Protocol package in a Kotlin project. A pinned version is an explicit dependency version kept fixed until someone changes it.

Use it when changing the package version, including requests made with the /bump-acp command, then verify every intended reference and run the project checks.

It prevents the package version from becoming inconsistent across source files, tests, and documentation. It also runs end-to-end checks after the update and stops when a newer version raises a stated Node.js compatibility concern.

How vanssata/jetbrains-claude-subscription configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to vanssata/jetbrains-claude-subscription. 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/vanssata/jetbrains-claude-subscription/master/.claude/skills/bump-acp/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/vanssata/jetbrains-claude-subscription

Made for: Claude Code.

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/skills/vanssata/jetbrains-claude-subscription/bump-acp/github.svg)](https://agentmods.dev/skills/vanssata/jetbrains-claude-subscription/bump-acp)

Your own site

<a href="https://agentmods.dev/skills/vanssata/jetbrains-claude-subscription/bump-acp"><img src="https://agentmods.dev/badge/skills/vanssata/jetbrains-claude-subscription/bump-acp/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/skills/vanssata/jetbrains-claude-subscription/bump-acp"><img src="https://agentmods.dev/badge/skills/vanssata/jetbrains-claude-subscription/bump-acp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 636 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.

Model	Per session	Once invoked
Fable 5.1	$0.00063	$0.00636
Opus 5.5	$0.00025	$0.00254
Sonnet 5.5	$0.00013	$0.00127
Haiku 4.5	$0.00006	$0.00064

Measured today against content hash cb090264846d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

bump-acp 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.

.claude/skills/bump-acp/SKILL.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.

Bump the pinned ACP package

The version lives in four places that must not drift. Change all of them in one commit.

1. Pick the version

Use the version given as the argument. Without one, take latest:

npm view @agentclientprotocol/claude-agent-acp version engines time.modified

Stop and ask before going on if engines.node is no longer >=22: MIN_NODE_MAJOR in NodeRuntimeResolver.kt and the README mirror that floor. A version published in the last day or two has had no users yet; say so and prefer one that has.

2. Edit the four places

Replace the old @agentclientprotocol/claude-agent-acp@<old> with the new version in:

src/main/kotlin/dev/vanssa/claudeacp/ClaudeAcpSettings.kt — DEFAULT_PACKAGE_SPEC
test/handshake.sh — the PACKAGE= default (test/models.sh reads it from there)
README.md — the acp.json example under "What it writes"
README.md — the packageSpec row of the settings table

Then confirm nothing was missed:

grep -rn "claude-agent-acp@" README.md src test

One hit is meant to stay behind unless you know better: the command under "The problem it solves" in README.md shows what JetBrains bundles, not what this plugin pins. Change it only when the version the IDE ships has been looked up.

3. Check

sh test/handshake.sh

sh test/models.sh

handshake.sh must print PASS: claude-ai-login offered. models.sh must print PASS, or SKIP without a Claude login — a SKIP leaves the model dropdown unchecked, so say so.

In a remote shell (SSH_CONNECTION, NO_BROWSER or CLAUDE_CODE_REMOTE set) the package offers claude-login instead and handshake.sh fails for that reason alone. Run it with those variables unset (env -u CLAUDE_CODE_REMOTE sh test/handshake.sh).

Then build and run the unit tests as CLAUDE.md describes.

4. Commit

feat: bump claude-agent-acp to <version>, with what the new version brings in the body. A bump changes the default for every user, so it needs a release to reach them — see the release gotcha in CLAUDE.md.

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.

today First seen · 65 lines · 63 tokens per session scan A cb090264846d

Subscribe to this mod's changes

bump-acp is a skill published in the GitHub repository vanssata/jetbrains-claude-subscription (18 stars, last pushed today), licensed MIT. It adds 63 tokens to every session and 636 once invoked, about $0.0003 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 2026-11-11.

Kotlin and Swift Languages Testing acp ai-assistant claude claude-ai intellij jetbrains-plugin

bump-acp next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
bump-acpvanssata/jetbrains-claude-subscription	Skill	18	today	MIT	A	63	Claude Code
swiftui-devOrkas-AI/Orkas	Skill	9.2k	yesterday	MIT	A	3	Claude Code, Codex
kotlin-multiplatformtravisjneuman/.claude	Skill	108	today	MIT	A	54	Claude Code
ios-developmenttravisjneuman/.claude	Skill	108	today	MIT	A	43	Claude Code
macos-nativetravisjneuman/.claude	Skill	108	today	MIT	A	40	Claude Code
agent-kotlin-experttravisjneuman/.claude	Skill	108	today	MIT	A	85	Claude Code
android-developmenttravisjneuman/.claude	Skill	108	today	MIT	A	33	Claude Code

jetbrains-claude-subscription: Skill for Claude Code