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hostctl

Operate the human's local computer through root-contained D109 tools, with bounded files and owned process sessions.

Skill by Cyb3rb1ade

IndexedMIT
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Install

Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/cyb3rb1ade-hostctl

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Operate the human's local computer through root-contained D109 tools, with bounded files and owned process sessions.

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Permissions

What this skill can do and what it asks for, from its SKILL.md and code. Checked Nov 2, 2026.

Tools
No tools found
Secrets
None asked for
Install scripts
None found

Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/hostctl

What's inside

Skill name
hostctl
Description
Operate the human's local computer through root-contained D109 tools, with bounded files and owned process sessions.
License
MIT
Instructions
22 lines in SKILL.md · view on GitHub

Files (1)

  • SKILL.md

SKILL.md (first lines)

Use only registered `hostctl.*` tools. They run locally inside the Harness; never start a remote host or expose a server for computer control.

1. Read/list/stat first. Stay in configured roots. For a large file, read a byte range with offset/length; binary content is refused.
2. Edit a precise unique string with `hostctl.fs.edit`; use more context after NOT_UNIQUE. Write/append publish atomically. Coordinate concurrent writers.
3. Use `hostctl.fs.trash` to remove an entry. Never use permanent deletion, shell deletion or a different tool to bypass a refusal.
4. Prefer `hostctl.proc.exec` with program, args array and root-contained cwd. For a long job use proc.start, retain its ID, inspect proc.read_output and close stdin/kill when done. IDs belong to the current agent/person/session and expire on session cleanup.
5. Shell commands need explicit config opt-in and normal D109 approval. Executables are not OS-sandboxed by cwd. Use the smallest task and timeout; avoid secrets in arguments/environment. Never turn a denied file action into an executable workaround.
6. Let the dispatcher request approvals only when needed; never claim a grant or surface trust. Foreign process termination uses proc.kill_foreign and a separate once approval. Clipboard reads require approval by default.
7. Open only intended root files or HTTP(S) links. Clipboard/notifications need an interactive desktop; report UNAVAILABLE/IO_ERROR if a helper is missing.

Examples:

```json
{"tool":"hostctl.fs.read","args":{"path":"notes.txt","offset":0,"length":4096}}
{"tool":"hostctl.fs.edit","args":{"path":"notes.txt","oldText":"Status: pending","newText":"Status: done"}}
{"tool":"hostctl.proc.start","args":{"program":"node","args":["scripts/check.mjs"],"cwd":"/granted/project","timeoutMs":120000}}
{"tool":"hostctl.proc.read_output","args":{"id":"ID_FROM_START"}}
```

Set shell.default to pwsh on Windows or bash/zsh on Unix; paths still use the host's rules. Trash uses Finder, Recycle Bin or freedesktop gio and never falls back to permanent deletion. No screen/input tools are available in this package.

From Cyb3rb1ade/PLUR1BUS-Harness, MIT.

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10
Last commit (this folder)
Oct 8, 2026 (1 month ago)

From GitHub (fetched Oct 24, 2026).

Details

License
MIT
First seen
Oct 24, 2026
Last checked
Oct 24, 2026

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Cite this page

hostctl skill. Agent Mart. https://agentmart.dev/skills/cyb3rb1ade-hostctl (last updated 2026-10-24)