A catalogue with tags
Skills, subagents, commands, hooks, MCP servers, plugins and AGENTS.md sections, each tagged with what it fits — mobile, ios, spring, infisical. /costia:init asks what the repository is and offers what matches.
Costia Claude ToolsAvailable now
Install a skill, and everything it needs.
Costia Claude Tools keeps your Claude Code setup in your Costia account. Install a skill in any repository and a guided set-up in your browser prepares what it depends on — the CLI, the sign-in, the secret — before a single file lands.
claude — ~/my-app
- ❯/costia:install play-store
- ◆play-store requires 3 set-up flows
- ↗Set-up opened in your browser
- ✓this computerInfisical CLI installed and signed in
- ✓projectInfisical project chosen
- ✓projectService account invited in Play Console
- ✓projectService account key stored in Infisical
- ✓Verified: the service account reaches Google Play
- ✓Applied .claude/skills/play-store
- ✻Claude is filling store/play/ from your listing…
Set-up that checks itself
An item can bring the steps it needs: install a CLI, sign in, create a project, store a secret. A page in your browser walks you through them, and the plugin proves each one before the item is applied.
Stores you can share
Gather items into a store and keep it private, share it with the people you choose — by nickname or with a link — or make it public in the marketplace.
Rules that stay in step
Managed AGENTS.md sections update themselves in every repository that uses them. They are changed in one place, never by hand.
Get started
Two commands in Claude Code.
Add the marketplace, install the plugin and sign in with your Costia account. The plugin installs without one, but does nothing until you sign in.
❯ /plugin marketplace add Costia-AI/claude-marketplace❯ /plugin install costia@costia-aiNeeds Node.js 20 or newer.
On claude.costia.app
The marketplace: the stores you can see, and their items by tag.
A skill’s set-up in the browser: each step with who has to do it, checked as you go.
A store: its items, who it is shared with, and Install on each one.
A catalogue item: its versions, its tags and the set-up flows it requires.
The catalogue
Everything Claude Code reads, tagged with what it fits.
Publish a skill folder, a command or an AGENTS.md section from Claude, or write it on the web. Every version is kept and never changes once published, so a project can follow the latest or stay on the one it trusts.
- Skills
- Subagents
- Commands
- Hooks
- MCP servers
- Plugins
- AGENTS.md sections
- Output styles
- Set-up flows
- mobile
- ios
- android
- react-native
- infisical
- spring
- typescript
- kotlin
Set-up flows
A skill arrives with what it needs, or not at all.
An item can require set-up flows: steps a person walks through on a page served by the plugin on your own computer, and checks the plugin runs to prove them. Until every step is done and every check passes, nothing of the item reaches the repository.
This computer
Once per machine: install the Infisical CLI and sign it in.
You
Once per account: accept an invitation sent to you.
The project
Once for everyone in it: create the service account, name the secret.
You in this project
Once per person in a project: a token of your own.
Once the files land, Claude carries out the steps written for it — scripts to scaffold, seed data to write — and the plugin checks the result.
Anyone can write a flow: on the web, step by step, or by asking Claude to turn the steps into one.
Where it lands
In the repository, beside it, or everywhere.
Every item you install goes where you choose.
The repository
.claude/
Committed with the code, for everyone who works on it.
Private
.claude/ · outside git
In your checkout only, listed in git’s exclude file so it never shows up in a commit.
Your user
~/.claude/
Skills, commands and rules in your own Claude Code, in every project on the machine.
Stores and the marketplace
Share your toolkit, on your terms.
Gather items into as many stores as you like. The marketplace on claude.costia.app shows the stores you can see; installing from it asks for a project and where the item should land.
Stores, sharing and the marketplace are free.
Private
Only the members of your workspace see it.
Shared
The people you choose, by nickname or with a link you can revoke.
Public
Every signed-in Costia user, listed in the marketplace.
AGENTS.md
> Managed by Costia — change these sections with edit_section.
<!-- costia:begin section="javirub/git-workflow" version="7" -->
## Git workflow
- Commit messages in English, with a conventional prefix.
- Never add a Co-Authored-By line for Claude.
<!-- costia:end section="javirub/git-workflow" -->
## This repository only
…
Managed AGENTS.md
One rule, every repository.
A managed section is written once and appears, between markers, in the AGENTS.md of every repository that uses it. Change it and the next session brings the change everywhere; edit it by hand and the plugin reports the drift instead of overwriting it.
Safety
Secrets never leave your machine.
Straight to your vault
A secret you give a set-up goes from the page on your own computer to your secret manager. Never through Costia, never on a command line, never shown to Claude.
Nothing runs without you
Hooks, permission rules, local MCP servers, scripts and plugins wait until you approve that exact version on your machine.
Only Claude Code’s files
AGENTS.md, CLAUDE.md, .mcp.json and .claude/ — never through a symlink, and nothing is committed for you.
Held, never deleted
If a set-up stops holding, the item is held back and you are told. What was already applied stays.
Costia Premium
Premium: your team on the same setup
- Organisations with roles and permissions
- Invite people to an organisation or a project
- Share a personal project with others
Premium bought in another Costia app is already active here.
See Costia PremiumAt a glance
- A plugin for Claude Code, and claude.costia.app in the browser
- Linux, macOS and Windows, with Node.js 20 or newer
- Sign in with your Costia account
- Free — organisations and invitations need Premium
- Writes only Claude Code’s own files, never through a symlink
Help and privacy
Questions
What does it cost?
Nothing. A Costia account is free, and so are projects, the catalogue, set-up flows, stores and the marketplace. Organisations and inviting people need Costia Premium — the same subscription as every Costia app.
Do I need an account?
Yes. The plugin installs without one, but everything it does lives in your Costia account, so the first thing it asks is that you sign in.
Does Costia see my code?
Only what you publish to the catalogue. For your projects it keeps their git remotes, their setup and what was applied — never your source and never a path on your disk.
Does it only work for Costia’s own projects?
No. A flow asks for your own project, secret names and app ids, so a toolkit written for one repository works in any other in minutes.
Which secret managers does it support?
Infisical today, in its US or EU cloud. The flow format leaves room for others.
Bring your setup with you.
Install the plugin, sign in, and your next repository starts where your last one left off.
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