Is the PowerSync skill free?

Yes. The skill itself is free from powersync-ja/agent-skills. SkillProof publishes the install command and an independent test verdict at no cost.

What is the PowerSync SkillProof Score?

9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.

How do I install PowerSync?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use PowerSync with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

PowerSync

Guided PowerSync onboarding: CLI-first setup, sync config, and SDK footgun rules

by powersync-ja · powersync-ja/agent-skills

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.2/10
Tested: Aug 5, 2026
Environment: Claude Code 2.x (agent harness)

⚠ This skill is no longer available upstream. Our re-check on Aug 10, 2026 couldn't find it any more (repo unreachable/deleted). The test below is what we measured on Aug 5, 2026 and we're leaving it up as a record — but there is nothing left to install, so we've removed the command.

The skill's flat rule 'never define the id column' is not style advice: a from-memory todos schema that declares id throws 'An id column is automatically added, custom id columns are not supported' out of Schema.validate() in the real @powersync/common package, while the schema written under the skill validates clean. The transaction.complete() rule it leads with is the same thing PowerSync's own shipped bundle warns about when the upload queue stalls. Its 84-line SKILL.md is a router rather than a wall of text, pointing at 14 reference files and eleven SDK guides, and the repo's validator confirms all 81 internal links resolve. The Cloud half (login, link, deploy) needs a PowerSync account and was not exercised, so the measured delta is on the client-schema slice only.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 8/10
Docs & honesty 5/5

What PowerSync does

Vendor-maintained onboarding workflow for PowerSync offline-first sync, covering Cloud and self-hosted setup, sync streams config, backend integration for Supabase, Postgres, MongoDB, MySQL and MSSQL, and eleven client SDK guides. Triggers whenever the user mentions PowerSync, offline-first or local-first sync, sync rules, uploadData or fetchCredentials, or wants offline-capable data in a mobile or web app. Enforces backend readiness before app code and carries the SDK rules that silently break sync when missed.

How to install PowerSync

Nothing to install: the source repository no longer has this skill. If the author brings it back, our daily re-check will pick it up and the command will reappear here.

Commands — how to trigger PowerSync

/powersync Guided PowerSync onboarding: CLI-first setup, sync config, and SDK footgun rules

It also activates on plain-language prompts like these:

Add offline-first sync to my Expo app using PowerSync
Write PowerSync sync rules for my Postgres tables please
My app is stuck on Syncing forever, help debug PowerSync

Frequently asked questions

Is the PowerSync skill free?: Yes. The skill itself is free from powersync-ja/agent-skills. SkillProof publishes the install command and an independent test verdict at no cost.
Does PowerSync work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Aug 5, 2026. Verdict: Tested · Works. The skill's flat rule 'never define the id column' is not style advice: a from-memory todos schema that declares id throws 'An id column is automatically added, custom id columns are not supported' out of Schema.validate() in the real @powersync/common package, while the schema written under the skill validates clean. The transaction.complete() rule it leads with is the same thing PowerSync's own shipped bundle warns about when the upload queue stalls. Its 84-line SKILL.md is a router rather than a wall of text, pointing at 14 reference files and eleven SDK guides, and the repo's validator confirms all 81 internal links resolve. The Cloud half (login, link, deploy) needs a PowerSync account and was not exercised, so the measured delta is on the client-schema slice only.
What is the PowerSync SkillProof Score?: 9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.
How do I install PowerSync?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use PowerSync with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.