Code Review Checklist
shareAI-lab/learn-claude-code
Reviews code against a five-part checklist covering security, correctness, performance, maintainability and testing, and reports findings in a fixed format.
A skill your agent uses whenever you need to RUN Synchronet JavaScript — executing inline JS expressions, running scripts from the install's exec/ directory, testing JS modules, or validating…
Custom licenceAuto-check: notes
Install Jsexec
$ npx skills add SynchronetBBS/sbbs --skill jsexec -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install SynchronetBBS/sbbs jsexec --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/SynchronetBBS/sbbs.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/jsexec .claude/skills/jsexec && 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 "jsexec" agent skill from https://github.com/SynchronetBBS/sbbs/tree/master/.claude/skills/jsexec into .claude/skills/jsexec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jsexec", 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/SynchronetBBS/sbbs/tree/master/.claude/skills/jsexecType 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 SynchronetBBS/sbbs --skill jsexec -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install SynchronetBBS/sbbs jsexec --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/SynchronetBBS/sbbs.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/jsexec .agents/skills/jsexec && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "jsexec" agent skill from https://github.com/SynchronetBBS/sbbs/tree/master/.claude/skills/jsexec into .agents/skills/jsexec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jsexec", 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 SynchronetBBS/sbbs --skill jsexec -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install SynchronetBBS/sbbs jsexec --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/SynchronetBBS/sbbs.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/jsexec .cursor/skills/jsexec && 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 "jsexec" agent skill from https://github.com/SynchronetBBS/sbbs/tree/master/.claude/skills/jsexec into .cursor/skills/jsexec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jsexec", 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/SynchronetBBS/sbbs.git --path .claude/skills/jsexec--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 SynchronetBBS/sbbs --skill jsexec -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install SynchronetBBS/sbbs jsexec --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/SynchronetBBS/sbbs.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/jsexec .gemini/skills/jsexec && 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 "jsexec" agent skill from https://github.com/SynchronetBBS/sbbs/tree/master/.claude/skills/jsexec into .gemini/skills/jsexec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jsexec", 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 SynchronetBBS/sbbs jsexecInstalls 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 SynchronetBBS/sbbs --skill jsexec -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/SynchronetBBS/sbbs.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/jsexec .github/skills/jsexec && 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 "jsexec" agent skill from https://github.com/SynchronetBBS/sbbs/tree/master/.claude/skills/jsexec into .github/skills/jsexec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jsexec", 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 SynchronetBBS/sbbs --skill jsexec -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install SynchronetBBS/sbbs jsexec --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/SynchronetBBS/sbbs.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/jsexec .opencode/skills/jsexec && 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 "jsexec" agent skill from https://github.com/SynchronetBBS/sbbs/tree/master/.claude/skills/jsexec into .opencode/skills/jsexec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jsexec", 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
jsexec- GitHub stars
- 111
- Token cost
- ~6.4k tokens
- SKILL.md length
- 3,033 words
- Files
- 1
- Skills in repo
- 8
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
A skill your agent uses whenever you need to RUN Synchronet JavaScript — executing inline JS expressions, running scripts from the install's exec/ directory, testing JS modules, or validating…
- Works in 2 steps: The exit_code global, which exit(N) sets… → An uncaught exception, which yields…
- You need to RUN Synchronet JavaScript — executing inline JS expressions
- SKILL.md covers Locating the install, Two invocation modes, Flags worth remembering and What the jsexec environment…, plus 9 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Jsexec is an agent skill from SynchronetBBS/sbbs. Use whenever you need to RUN Synchronet JavaScript — executing inline JS expressions, running scripts from the install's exec/ directory, testing JS modules, or validating changes to .js/.ssjs/.xjs files against a live install. This skill covers the jsexec runner itself: invocation modes, flags, output capture, crash tracing, and (on Windows) running a freshly-built debug binary. Trigger on "run a Synchronet script", "test this JS against Synchronet", "check what jsexec does", or any one-off JavaScript probe of a…
Its SKILL.md is about 6.4k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It works with JavaScript. The repository describes itself as: Mirror of gitlab.synchro.net/sbbs (don't submit pull requests here).
When your agent uses it
- You need to RUN Synchronet JavaScript — executing inline JS expressions
- Running scripts from the installs exec/ directory
- Testing JS modules
- Validating changes to .js/.ssjs/.xjs files against a live install
Example prompts
- “run a Synchronet script”
- “test this JS against Synchronet”
- “check what jsexec does”
- “/jsexec”
Workflow steps
2 steps, taken from the first numbered list in SKILL.md.
- The exit_code global, which exit(N) sets — status is then N.
- An uncaught exception, which yields status 1.
What it can do on your machine
Read from SKILL.md and the folder at commit d83fbe2. 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 bash, javascript and c).
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):
wiki.synchro.netnix.synchro.net
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
Jsexec loads about 6.4k tokens when it runs. Until then it costs about 178 tokens; SKILL.md has 3,033 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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NoteRuns commands with sudoSKILL.md:429
prefer `sudo -u sbbs jsexec ...` or stick to read-only probes.
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 3,033 words (~6,390 tokens).
“jsexec is the standalone runner for Synchronet's JavaScript engine (SpiderMonkey 1.8.5). It loads the full Synchronet runtime — config, message bases, file bases, sockets, the system/server/js globals — without requiring a BBS session. It's the fastest way to run a…”
- name
- jsexec
Files
Just SKILL.md in .claude/skills/jsexec of SynchronetBBS/sbbs.
Open the folder on GitHubat commit d83fbe2
Compare with similar skills
Jsexec 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 |
|---|---|---|---|---|---|---|
| Jsexec this skillSynchronetBBS/sbbs | 111 | — | ~6.4k | Automated safety check: Notes | Custom licence | |
| Code Review ChecklistshareAI-lab/learn-claude-code | 78k | 4 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Tailwindcss Developmentanonaddy/anonaddy | 4.9k | 10 repos | ~865 | Automated safety check: Pass | MIT | |
| Figma use_figma Plugin API Ruleswarpdotdev/warp | 65k | 4 repos | ~4.4k | Automated safety check: Pass | AGPL-3.0 | |
| JavaScript Concept Fact Checkerleonardomso/33-js-concepts | 67k | 1 repos | ~5k | Automated safety check: Pass | MIT | |
| GSAP Core Animationgreensock/gsap-skills | 16k | 3 repos | ~3.7k | Automated safety check: Pass | MIT |
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Questions about Jsexec
What does Jsexec do?
A skill your agent uses whenever you need to RUN Synchronet JavaScript — executing inline JS expressions, running scripts from the install's exec/ directory, testing JS modules, or validating…. Jsexec is an agent skill from SynchronetBBS/sbbs.xjs files against a live install.
When should I use Jsexec?
Jsexec fits situations like: you need to RUN Synchronet JavaScript — executing inline JS expressions; running scripts from the installs exec/ directory; testing JS modules; validating changes to .js/.ssjs/.xjs files against a live install.
How do I install Jsexec in Claude Code?
Run `npx skills add SynchronetBBS/sbbs --skill jsexec -a claude-code`. Or copy the skill folder (.claude/skills/jsexec in SynchronetBBS/sbbs) into .claude/skills/jsexec in your project. Claude Code loads it when a task matches its description.
How do I install Jsexec in Codex?
Run `npx skills add SynchronetBBS/sbbs --skill jsexec -a codex`. Or copy the skill folder (.claude/skills/jsexec in SynchronetBBS/sbbs) into .agents/skills/jsexec in your project. Codex loads it when a task matches its description.
Can I use Jsexec 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 SynchronetBBS/sbbs --skill jsexec -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/jsexec, .gemini/skills/jsexec, .github/skills/jsexec and .opencode/skills/jsexec in your project.
What does Jsexec need to run?
SKILL.md names no scripts, command-line tools or credentials: Jsexec is instructions for the agent only.
Does Jsexec access the network?
SKILL.md names 2 domains. As links in the text: wiki.synchro.net and nix.synchro.net. This is read from the text; nothing was executed.
Is Jsexec safe to install?
Our automated static check of SKILL.md found notes only (runs commands with sudo), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Jsexec use?
Jsexec 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 Jsexec use?
About 6.4k tokens (SKILL.md is roughly 26k 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 Jsexec?
Skills that share tags, products or a category with Jsexec: Code Review Checklist (shareAI-lab/learn-claude-code, 78k stars), Tailwindcss Development (anonaddy/anonaddy, 4.9k stars), Figma use_figma Plugin API Rules (warpdotdev/warp, 65k stars) and JavaScript Concept Fact Checker (leonardomso/33-js-concepts, 67k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Jsexec?
SynchronetBBS (a GitHub organization) maintains it in SynchronetBBS/sbbs, which has 111 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on October 6, 2026.
Source: SynchronetBBS/sbbs on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.