Supabase Development and Debugging
supabase/agent-skills
General Supabase skill for database, auth, Edge Functions, Realtime and storage work, plus client libraries, migrations, security audits, debugging and reading logs.
Change eXeLearning shared document mutations, WebSocket rooms, snapshots, reconnects or concurrent editing behavior.
Install Websocket Yjs
$ npx skills add exelearning/exelearning --skill websocket-yjs -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install exelearning/exelearning websocket-yjs --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/exelearning/exelearning.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/websocket-yjs .claude/skills/websocket-yjs && rm -rf skills-srcUse ~/.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/
Install the "websocket-yjs" agent skill from https://github.com/exelearning/exelearning/tree/main/.agents/skills/websocket-yjs into .claude/skills/websocket-yjs/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "websocket-yjs", 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 install https://github.com/exelearning/exelearning/tree/main/.agents/skills/websocket-yjsType 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.
$ npx skills add exelearning/exelearning --skill websocket-yjs -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install exelearning/exelearning websocket-yjs --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/exelearning/exelearning.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/websocket-yjs .agents/skills/websocket-yjs && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "websocket-yjs" agent skill from https://github.com/exelearning/exelearning/tree/main/.agents/skills/websocket-yjs into .agents/skills/websocket-yjs/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "websocket-yjs", 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.
$ npx skills add exelearning/exelearning --skill websocket-yjs -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install exelearning/exelearning websocket-yjs --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/exelearning/exelearning.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/websocket-yjs .cursor/skills/websocket-yjs && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "websocket-yjs" agent skill from https://github.com/exelearning/exelearning/tree/main/.agents/skills/websocket-yjs into .cursor/skills/websocket-yjs/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "websocket-yjs", 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 https://github.com/exelearning/exelearning.git --path .agents/skills/websocket-yjs--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add exelearning/exelearning --skill websocket-yjs -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install exelearning/exelearning websocket-yjs --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/exelearning/exelearning.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/websocket-yjs .gemini/skills/websocket-yjs && rm -rf skills-srcUse ~/.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/
Install the "websocket-yjs" agent skill from https://github.com/exelearning/exelearning/tree/main/.agents/skills/websocket-yjs into .gemini/skills/websocket-yjs/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "websocket-yjs", 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.
$ gh skill install exelearning/exelearning websocket-yjsInstalls 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).
$ npx skills add exelearning/exelearning --skill websocket-yjs -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/exelearning/exelearning.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/websocket-yjs .github/skills/websocket-yjs && rm -rf skills-srcUse ~/.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/
Install the "websocket-yjs" agent skill from https://github.com/exelearning/exelearning/tree/main/.agents/skills/websocket-yjs into .github/skills/websocket-yjs/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "websocket-yjs", 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.
$ npx skills add exelearning/exelearning --skill websocket-yjs -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install exelearning/exelearning websocket-yjs --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/exelearning/exelearning.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/websocket-yjs .opencode/skills/websocket-yjs && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "websocket-yjs" agent skill from https://github.com/exelearning/exelearning/tree/main/.agents/skills/websocket-yjs into .opencode/skills/websocket-yjs/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "websocket-yjs", 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
websocket-yjs- GitHub stars
- 145
- Token cost
- ~759 tokens
- SKILL.md length
- 357 words
- Files
- 1
- Skills in repo
- 17
- Repo updated
- First seen
- Licence
- AGPL-3.0
At a glance
Change eXeLearning shared document mutations, WebSocket rooms, snapshots, reconnects or concurrent editing behavior.
- Tasks that involve Realtime and WebSockets
- SKILL.md covers State and transport boundaries and Mutations and concurrent editors
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Websocket Yjs is an agent skill from exelearning/exelearning. Change eXeLearning shared document mutations, WebSocket rooms, snapshots, reconnects or concurrent editing behavior.
Its SKILL.md is about 760 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Backend & APIs, covering Realtime and WebSockets. The repository describes itself as: eXeLearning is an AGPL-licensed free/libre tool to create and publish open educational resources. The licence is AGPL-3.0.
When your agent uses it
- Tasks that involve Realtime and WebSockets
Example prompts
- “/websocket-yjs”
What it can do on your machine
Read from SKILL.md and the folder at commit 319b5d2. 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.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
docs.yjs.dev
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
Websocket Yjs loads about 759 tokens when it runs. Until then it costs about 33 tokens; SKILL.md has 357 words of instructions outside code blocks.
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 passed
The automated check found no risky patterns in SKILL.md.
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
The full file from exelearning/exelearning at commit 319b5d2, republished under its AGPL-3.0 licence (© exelearning). 357 words, ~759 tokens.
Download SKILL.mdSave it as
.claude/skills/websocket-yjs/SKILL.md (or your agent's skills folder).- name
- websocket-yjs
- description
- Change eXeLearning shared document mutations, WebSocket rooms, snapshots, reconnects or concurrent editing behavior.
Yjs collaboration
Read src/websocket/{room-manager,yjs-websocket,yjs-persistence}.ts, src/yjs/,
public/app/yjs/, and real-time documentation.
Use Yjs shared types and
document updates for API semantics.
State and transport boundaries
- Browser
YjsDocumentManagerowns the live editing document. WebSocket rooms retain connections and lightweight coordination state; they do not keep a long-lived authoritative Y.Doc per room. - Server reconstruction, snapshot processing and CLI/API export do create temporary Y.Docs. Preserve those legitimate operations and their cleanup; do not turn the relay rule into a server-wide ban.
- Binary Yjs sync/awareness and JSON asset coordination share a socket but are different protocols. Preserve authentication, project access, message limits, heartbeat, disconnect and room cleanup.
- Awareness is ephemeral presence, not persistent content. Respect the existing late-join/resync protocol
and
connectWebSocket()/provider reconnect lifecycle rather than adding a second sync loop.
Mutations and concurrent editors
- Use existing Y.Map/Y.Array/Y.Text shapes and transaction origins. Group related mutations in a transaction; preserve observer/undo origin filtering and avoid reflecting a remote update back as a fresh local edit.
- A shared type can be integrated only once. Reordering/copying must follow the project's clone/rebuild helpers; deleting and reinserting the same integrated object is not an ordinary array move.
- Do not replace shared structures with plain JSON mutations or apply whole-document replacement to a local edit. Concurrent peer updates and legacy import normalization must remain distinct.
- Preserve the deferred-page-reload behavior when another user adds an iDevice while an editor is active. Resolve it through the existing bridge on leaving edition; never discard the active user's work.
- Preserve installed Yjs identity and V1/V2 encoding contracts across browser bundles, persistence and server tools. A generic skill is not authorization to add Liveblocks, YKeyValue or a schema migration.
- Unobserve listeners and destroy temporary documents/providers when their owner is disposed. Avoid retaining document references after cleanup; test reconnect without duplicate listeners or orphan awareness.
Show full SKILL.md (61 more words)Show less
Run focused Bun server specs and Vitest client specs, then final gates in verify-change.
Use the collaboration fixture with separate users for simultaneous edits, late join, disconnect/reconnect,
and an active editor while a peer changes the page. Check persisted content after reload, not only DOM text.
Use valid hex project UUIDs in fixtures; test asset JSON messages separately from binary sync.
© exelearning, AGPL-3.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .agents/skills/websocket-yjs of exelearning/exelearning.
Open the folder on GitHubat commit 319b5d2
Compare with similar skills
Websocket Yjs 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Websocket Yjs this skillexelearning/exelearning | 145 | — | ~759 | Automated safety check: Pass | AGPL-3.0 | |
| Supabase Development and Debuggingsupabase/agent-skills | 2.7k | 3 repos | ~3.6k | Automated safety check: Pass | MIT | |
| Use Yaakmountain-loop/yaak | 19k | — | ~1.9k | Automated safety check: Pass | MIT | |
| Gemini Live API Devgoogle-gemini/gemini-skills | 4.3k | — | ~4.6k | Automated safety check: Pass | Apache-2.0 | |
| Web3 PolymarketPolymarket/agent-skills | 191 | 2 repos | ~2k | Automated safety check: Pass | None | |
| GraphQL ArchitectJeffallan/claude-skills | 12k | 1 repos | ~1.3k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Websocket Yjs
What does Websocket Yjs do?
Change eXeLearning shared document mutations, WebSocket rooms, snapshots, reconnects or concurrent editing behavior. Websocket Yjs is an agent skill from exelearning/exelearning. Change eXeLearning shared document mutations, WebSocket rooms, snapshots, reconnects or concurrent editing behavior.
When should I use Websocket Yjs?
Websocket Yjs fits situations like: tasks that involve Realtime and WebSockets.
How do I install Websocket Yjs in Claude Code?
Run `npx skills add exelearning/exelearning --skill websocket-yjs -a claude-code`. Or copy the skill folder (.agents/skills/websocket-yjs in exelearning/exelearning) into .claude/skills/websocket-yjs in your project. Claude Code loads it when a task matches its description.
How do I install Websocket Yjs in Codex?
Run `npx skills add exelearning/exelearning --skill websocket-yjs -a codex`. Or copy the skill folder (.agents/skills/websocket-yjs in exelearning/exelearning) into .agents/skills/websocket-yjs in your project. Codex loads it when a task matches its description.
Can I use Websocket Yjs 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 exelearning/exelearning --skill websocket-yjs -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/websocket-yjs, .gemini/skills/websocket-yjs, .github/skills/websocket-yjs and .opencode/skills/websocket-yjs in your project.
What does Websocket Yjs need to run?
SKILL.md names no scripts, command-line tools or credentials: Websocket Yjs is instructions for the agent only.
Does Websocket Yjs access the network?
SKILL.md names 1 domain. As links in the text: docs.yjs.dev. This is read from the text; nothing was executed.
Is Websocket Yjs safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Websocket Yjs use?
Websocket Yjs is published under the AGPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Websocket Yjs use?
About 759 tokens (SKILL.md is roughly 3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Websocket Yjs?
Skills that share tags, products or a category with Websocket Yjs: Supabase Development and Debugging (supabase/agent-skills, 2.7k stars), Use Yaak (mountain-loop/yaak, 19k stars), Gemini Live API Dev (google-gemini/gemini-skills, 4.3k stars) and Web3 Polymarket (Polymarket/agent-skills, 191 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Websocket Yjs?
exelearning (a GitHub organization) maintains it in exelearning/exelearning, which has 145 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on October 7, 2026.
Source: exelearning/exelearning on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.