Agent skill

Zero Sync

Zero sync engine patterns for React and TanStack Start apps.

Custom licenceAuto-check: notesBackend & APIs

Install Zero Sync

skills CLI

$ npx skills add Compound-inc/rift --skill zero-sync -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install Compound-inc/rift zero-sync --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/Compound-inc/rift.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.pi/skills/zero-sync .claude/skills/zero-sync && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "zero-sync" agent skill from https://github.com/Compound-inc/rift/tree/main/.pi/skills/zero-sync into .claude/skills/zero-sync/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "zero-sync", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/Compound-inc/rift/tree/main/.pi/skills/zero-sync

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add Compound-inc/rift --skill zero-sync -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install Compound-inc/rift zero-sync --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/Compound-inc/rift.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.pi/skills/zero-sync .agents/skills/zero-sync && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "zero-sync" agent skill from https://github.com/Compound-inc/rift/tree/main/.pi/skills/zero-sync into .agents/skills/zero-sync/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "zero-sync", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add Compound-inc/rift --skill zero-sync -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install Compound-inc/rift zero-sync --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/Compound-inc/rift.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.pi/skills/zero-sync .cursor/skills/zero-sync && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "zero-sync" agent skill from https://github.com/Compound-inc/rift/tree/main/.pi/skills/zero-sync into .cursor/skills/zero-sync/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "zero-sync", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/Compound-inc/rift.git --path .pi/skills/zero-sync

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add Compound-inc/rift --skill zero-sync -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install Compound-inc/rift zero-sync --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/Compound-inc/rift.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.pi/skills/zero-sync .gemini/skills/zero-sync && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "zero-sync" agent skill from https://github.com/Compound-inc/rift/tree/main/.pi/skills/zero-sync into .gemini/skills/zero-sync/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "zero-sync", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install Compound-inc/rift zero-sync

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add Compound-inc/rift --skill zero-sync -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/Compound-inc/rift.git skills-src && mkdir -p .github/skills && cp -r skills-src/.pi/skills/zero-sync .github/skills/zero-sync && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "zero-sync" agent skill from https://github.com/Compound-inc/rift/tree/main/.pi/skills/zero-sync into .github/skills/zero-sync/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "zero-sync", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add Compound-inc/rift --skill zero-sync -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install Compound-inc/rift zero-sync --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/Compound-inc/rift.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.pi/skills/zero-sync .opencode/skills/zero-sync && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "zero-sync" agent skill from https://github.com/Compound-inc/rift/tree/main/.pi/skills/zero-sync into .opencode/skills/zero-sync/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "zero-sync", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: zero-sync
GitHub stars: 123
Token cost: ~3.7k tokens
SKILL.md length: 331 words
Files: 3 (incl. references)
Skills in repo: 5
Repo updated: Sep 28, 2026
First seen: Oct 7, 2026
Licence: Custom licence

At a glance

Zero sync engine patterns for React and TanStack Start apps.

Implementing Zero (@rocicorp/zero)
SKILL.md covers Quick Reference: Critical Rules, Schema Definition, Queries and Mutators, plus 5 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Defining ZQL queries

What it does

Zero Sync is an agent skill from Compound-inc/rift. Zero sync engine patterns for React and TanStack Start apps. Schema definition, queries, mutators, authentication, and real-time sync. Use when implementing Zero (@rocicorp/zero), defining ZQL queries, creating mutators, or setting up sync with Postgres.

Its SKILL.md is about 3.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including reference files (for example `references/permissions-patterns.md` and `references/zql-operators.md`).

It sits in Backend & APIs. It works with React, PostgreSQL and TanStack.

When your agent uses it

Implementing Zero (@rocicorp/zero)
Defining ZQL queries
Creating mutators
Setting up sync with Postgres

Example prompts

“/zero-sync”

What it can do on your machine

Read from SKILL.md and the folder at commit 4471fb5. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are typescript and bash).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Zero Sync loads about 3.7k tokens when it runs, and up to ~6k if it reads all its reference files. Until then it costs about 66 tokens; SKILL.md has 331 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~66
When it runs · the whole SKILL.md, loaded when a task matches: ~3.7k
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

NoteMentions a .env fileSKILL.md:443
```
# .env
```

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 331 words (~3,691 tokens).

“Zero is a query-driven sync engine that replicates Postgres into a SQLite replica inside zero-cache, then syncs subsets of rows to clients based on queries. Client reads/writes hit local storage first (instant UI), with zero-cache keeping clients up to date…”

— opening of SKILL.md by Compound-inc, Custom licence

name: zero-sync

Outline of SKILL.md

Zero Sync Engine
Quick Reference: Critical Rules
Schema Definition
Table Schemas
Relationships
Schema Export
Queries
Defining Queries
Context for Permissions
React Integration
Suspense Support
Mutators
Defining Mutators
CRUD Operations
Reading in Mutators
Waiting for Results
ZQL Reference
Basic Queries
Relationships
Compound Filters
Null Handling
TanStack Start Integration
Server Endpoints
Auth Middleware
Authentication
Cookie Auth (Recommended)
Token Auth
Handling Auth Errors
Connection States
Gotchas & Common Pitfalls

Read the full SKILL.md on GitHub

Files

SKILL.md and 2 other files (references) in .pi/skills/zero-sync of Compound-inc/rift.

SKILL.md
references/permissions-patterns.md
references/zql-operators.md

Open the folder on GitHubat commit 4471fb5

Compare with similar skills

Zero Sync next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Zero Sync compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Zero Sync this skillCompound-inc/rift	123	—	~3.7k	Automated safety check: Notes	Custom licence	9 days ago
Supabasecurvenote/curvenote	169	5 repos	~2.2k	Automated safety check: Pass	Custom licence	9 days ago
Tanstack Query Best PracticesDeckardGer/tanstack-agent-skills	222	1 repos	~1.2k	Automated safety check: Pass	MIT	28 days ago
Trpc PatternsFranciscoMoretti/chat-js	1.2k	—	~288	Automated safety check: Pass	Apache-2.0	today
Shadmin CLIahaodev/shadmin	174	—	~1.1k	Automated safety check: Notes	MIT	5 days ago
Tanstack Start Best PracticesDeckardGer/tanstack-agent-skills	222	—	~1k	Automated safety check: Pass	MIT	28 days ago

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Questions about Zero Sync

What does Zero Sync do?

Zero sync engine patterns for React and TanStack Start apps. Zero Sync is an agent skill from Compound-inc/rift. Zero sync engine patterns for React and TanStack Start apps.

When should I use Zero Sync?

Zero Sync fits situations like: implementing Zero (@rocicorp/zero); defining ZQL queries; creating mutators; setting up sync with Postgres.

How do I install Zero Sync in Claude Code?

Run `npx skills add Compound-inc/rift --skill zero-sync -a claude-code`. Or copy the skill folder (.pi/skills/zero-sync in Compound-inc/rift) into .claude/skills/zero-sync in your project. Claude Code loads it when a task matches its description.

How do I install Zero Sync in Codex?

Run `npx skills add Compound-inc/rift --skill zero-sync -a codex`. Or copy the skill folder (.pi/skills/zero-sync in Compound-inc/rift) into .agents/skills/zero-sync in your project. Codex loads it when a task matches its description.

Can I use Zero Sync in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Compound-inc/rift --skill zero-sync -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/zero-sync, .gemini/skills/zero-sync, .github/skills/zero-sync and .opencode/skills/zero-sync in your project.

What does Zero Sync need to run?

SKILL.md names no scripts, command-line tools or credentials: Zero Sync is instructions for the agent only.

Does Zero Sync access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Zero Sync safe to install?

Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Zero Sync use?

Zero Sync has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Zero Sync use?

About 3.7k tokens (SKILL.md is roughly 15k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.3k tokens, read only when the agent opens those files.

What are the alternatives to Zero Sync?

Skills that share tags, products or a category with Zero Sync: Supabase (curvenote/curvenote, 169 stars), Tanstack Query Best Practices (DeckardGer/tanstack-agent-skills, 222 stars), Trpc Patterns (FranciscoMoretti/chat-js, 1.2k stars) and Shadmin CLI (ahaodev/shadmin, 174 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Zero Sync?

Compound-inc (a GitHub organization) maintains it in Compound-inc/rift, which has 123 GitHub stars. The repository holds 5 skills in this directory. The repository was last updated on September 28, 2026.

Source: Compound-inc/rift on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Zero Sync

Install Zero Sync

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

Supabase

Tanstack Query Best Practices

Trpc Patterns

Shadmin CLI

Tanstack Start Best Practices

Frontend Conventions

More from Compound-inc/rift

Rift Backend Effect

AI SDK

Adding Sidebar Sections

Building Components

Questions about Zero Sync

Install Zero Sync

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

More from Compound-inc/rift

Related

Questions about Zero Sync