Skillbox

Skillbox Review: One Library for Your AI Skills, Synced to Every Agent

AI skills multiply quickly. One came from GitHub. Another lives in a project folder. Three more are installed for Cursor but missing from Claude Code. A teammate has the version everyone else should be using. Eventually, nobody knows what they have, which copy is current, or why one agent behaves differently from another. Skillbox was built for that exact mess: one library that keeps every skill you use in one place and delivers the right set to every tool on every machine.

Skillbox launched on Product Hunt in November 2026, and it arrives at the right moment. Agent skills have become the way coding knowledge is packaged and reused, but the tooling around them has not kept up: skills are scattered across machines, versions drift silently, and nobody checks what a skill actually does before an agent runs it. Skillbox answers with a library, per-project delivery, version control and a security scanner, wrapped in a free plan that covers the core workflow.

What Is Skillbox?

Skillbox is a home for the skills your AI coding tools use. A skill is a set of instructions for a task, such as reviewing code or debugging a problem, and Skillbox helps you find those instructions and keep them available wherever you work. You import skills from your computer, add them from GitHub or GitLab, or keep something useful from Explore, the built-in catalogue. Skillbox remembers where each skill came from, and gives you one place to find it again.

Saving a skill keeps it in your Library. Activating it delivers a smaller, chosen set to the tools on your machines, everywhere or only inside the project where it belongs. It syncs across Claude Code, Cursor and Codex, so a frontend project does not load the same setup as a release repository. Skills added from repositories keep following their sources: when something changes, the incoming version stays separate from the version you currently use, and you see the changed instructions and files together before deciding what should update.

Key Features of Skillbox

1. One library for every skill

Skillbox brings together the skills you already use from every source: review the skills already on your machine, add them from GitHub and GitLab, or browse Explore and inspect a skill before adding it to your library. Related skills can be grouped into collections around the work you do, from frontend development to release preparation, so a useful workflow is easy to find again and pass on.

2. Delivery across your tools, per project

Activating a skill delivers it to the folders your coding tools actually read, on every connected machine or only inside one project. You choose which skills belong in each project, and you can check what should be on a machine against what it has reported. That ends the familiar problem of one agent behaving differently from another because its skill set quietly drifted.

3. Source tracking and version control

Skills from repositories continue to follow their sources. When something changes, you see the changed instructions and files together, and you choose how updates arrive: follow suitable versions automatically, or hold every change for review. An incoming version never silently replaces the copy already on your machines, and if it clashes with your customisations you can review the conflict first.

4. Skillbox Trust security scanning

Every new skill version is checked before it can reach your connected machines. Skillbox checks versions with the Cisco Skill Scanner and labels findings in STRIDE and OWASP terms, covering prompt injection, data exfiltration, hardcoded secrets and obfuscated code. You can open the details behind a result and see what needs attention, skills containing executables require your explicit opt-in before syncing, and allowing one flagged version does not automatically approve its next update. A passing check is not a guarantee that a skill is harmless, and Skillbox says so plainly.

5. Trim and Capture: less noise, more reuse

Skillbox Trim shortens the noisy test, git and build output before your agent reads it, so sessions last longer instead of compacting and losing the work; the full output stays on your machine, and Trim shows how much of the session it kept out of context. Capture turns a coding session that went particularly well into a reusable skill, separating the reusable method from the names, paths and private details that belonged only to that conversation. You can also preview a skill in chat before relying on it, and edit its instructions yourself or with the editing assistant.

How It Works

Start with a skill you want to try. Save it before installing anything, then connect a machine when you are ready to use it. Import what is already on your computer, pin skills from GitHub or GitLab, or discover new ones in Explore. Activate the skills each project needs, and Skillbox delivers that set to Claude Code, Cursor and Codex on your connected machines. When a followed source changes, review the diff and decide whether to follow it. For teams, invite teammates into a shared workspace so everyone works from the same library, collections and project standards, while personal work stays in your own workspace.

Who Should Use Skillbox?

• Developers using Claude Code, Cursor or Codex whose skills are scattered across machines and projects and want one library with per-project control.
• Teams standardising AI workflows that need a shared library, required skills for everyone, and a weekly report on what is running and what is missing.
• Security-conscious engineers who want every skill version scanned for prompt injection, exfiltration, secrets and obfuscated code before it reaches their tools.
• Power users of agent skills who collect skills from GitHub and need version diffs, update control and a way to turn good sessions into reusable skills.
• Anyone whose agent sessions keep compacting because test and build output floods the context, and who wants Trim to keep sessions alive longer.

Pricing

Skillbox has three plans. Free costs 0 pounds a month, for as long as you like, with no card required: one library for your AI skills, delivery across your tools, source tracking and updates, Skillbox Trust, automatic maintenance and Capture, for up to 3 devices and 100 followed sources. Individual costs 6.99 pounds a month, billed monthly after a 7-day trial, and adds context Trim, Skillbox AI and Try in chat, with no device or source limits. Team costs 12.99 pounds per active member per month, billed monthly, and adds shared workspaces, team standards, workspace usage and a weekly report, with more library storage. Trim, AI and Try in chat start a 7-day trial when you turn them on and need a card to begin. There is no security add-on on any plan: Trust scanning is included in Free too.

Pros and Cons

Pros

• Free plan covers the core workflow: library, sync, source tracking and Trust scanning, with no card required
• Per-project skill delivery across Claude Code, Cursor and Codex ends cross-machine drift
• Real version control for skills: diffs, auto-follow or hold for review, no silent replacement
• Security scanning with the Cisco Skill Scanner, labelled in STRIDE and OWASP terms, before anything syncs
• Trim genuinely extends agent sessions by cutting noisy command output from context
• Capture turns successful sessions into reusable skills without manual rebuilding

Cons

• Trim, Skillbox AI and Try in chat sit behind the 6.99 pound Individual plan, so the most distinctive AI features are not free
• Mac-focused: the download is for Mac, and the site leads with a Mac download
• Prices are in pounds, so the monthly cost in other currencies moves with the exchange rate
• Young product with a small ecosystem: Explore is a catalogue, not yet a large community marketplace
• Trust scanning is a check, not a guarantee: a passing result does not mean a skill is harmless

Final Verdict

Skillbox is the missing piece of the agent-skills workflow: not another place to find skills, but the place that keeps them organised, versioned, checked and delivered to the right project. The free plan is unusually complete, with library, sync, source tracking and Cisco-backed Trust scanning all included, and the Individual plan at 6.99 pounds a month is fair for Trim and Skillbox AI. If you use Claude Code, Cursor or Codex and your skills have started to scatter, Skillbox is the most practical way to bring them back under control, and the security scanning alone justifies adopting it before the next skill from a random repository reaches your tools.