The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
Install
git clone https://github.com/1jehuang/jcodeInstall command taken from the project's README or registry entry. Always review code before running it.
README excerpt
Read full README on GitHub →jcode
High-performance coding agents. Run more agents with less RAM for your multi-agent development workflow.
Website · Docs · SDK · Benchmarks · Screenshots · Install · Contributing
Screenshots
Browse the interactive gallery on jcode.sh.
Installation
# macOS & Linux
curl -fsSL https://jcode.sh/install | bash
Windows installation instructions.
Performance & Resource Efficiency
jcode is built to be as performant and resource efficient as possible. Every metric is optimized to the bone, which is important for scaling multi-session workflows. Here we sample a few metrics to show the difference: RAM usage and boot up.
RAM comparison
<thead>
<tr>
<th>Tool</th>
<th>PSS</th>
<th>Comparison</th>
</tr>
</thead>
<tbody>
<tr>
<td><strong>jcode (local embedding off)</strong></td>
<td align="right"><strong>27.8 MB</strong></td>
<td align="right">baseline</td>
</tr>
<tr>
<td><strong>jcode</strong></td>
<td align="right"><strong>167.1 MB</strong></td>
<td align="right"><strong>6.0× more RAM</strong></td>
</tr>
<tr>
<td><strong>pi</strong></td>
<td align="right"><strong>144.4 MB</strong></td>
<td align="right"><strong>5.2× more RAM</strong></td>
</tr>
<tr>
<td><strong>Codex CLI</strong></td>
<td align="right"><strong>140.0 MB</strong></td>
<td align="right"><strong>5.0× more RAM</strong></td>
</tr>
<tr>
<td><strong>OpenCode</strong></td>
<td align="right"><strong>371.5 MB</strong></td>
<td align="right"><strong>13.4× more RAM</strong></td>
</tr>
<tr>
<td><strong>GitHub Copilot CLI</strong></td>
<td align="right"><strong>333.3 MB</strong></td>
<td align="right"><strong>12.0× more RAM</strong></td>
</tr>
<tr>
<td><strong>Cursor Agent</strong></td>
<td align="right"><strong>214.9 MB</strong></td>
<td align="right"><strong>7.7× more RAM</strong></td>
</tr>
<tr>
<td><strong>Claude Code</strong></td>
<td align="right"><strong>386.6 MB</strong></td>
<td align="right"><strong>13.9× more RAM</strong></td>
</tr>
<tr>
<td><strong>Antigravity CLI</strong></td>
<td align="right"><strong>243.7 MB</strong></td>
<td align="right"><strong>8.8× more RAM</strong></td>
</tr>
</tbody>
</td>
<td width="24"></td>
<td valign="top" align="center" width="50%">
<strong>10 active sessions</strong>
<thead>
<tr>
<th>Tool</th>
<th>PSS</th>
<
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