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signal

Send messages and media via Signal CLI.

Skill by dexter

IndexedApache-2.0★ 1
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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/emiliougarte65-signal

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

Send messages and media via Signal CLI. List linked devices. Requires signal-cli installed and a registered number. Trigger: "signal", "send signal", "mensaje signal", "signal message".

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Permissions

What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

Tools
No tools found
Secrets
None asked for
Install scripts
None found
Runs as
Python package

Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/signal

Tools it pre-approves 1

From allowed-tools in SKILL.md: the agent may use these without asking you each time.

  • Bash

What's inside

Skill name
signal
Description
Send messages and media via Signal CLI. List linked devices. Requires signal-cli installed and a registered number. Trigger: "signal", "send signal", "mensaje signal", "signal message".
License
Apache-2.0
Allowed tools
Bash
Metadata
author: dexter · source: dexter · audited: true · version: 1.0
Instructions
44 lines in SKILL.md · view on GitHub

Before installing

  • Ships executable scripts
  • Pre-approves any shell command

Files (2)

  • SKILL.md
  • send.py · scripts/

SKILL.md (first lines)

# Signal

Interacts with Signal via [signal-cli](https://github.com/AsamK/signal-cli) to send text messages, media attachments, and inspect linked devices.

## Setup

1. Install signal-cli — see https://github.com/AsamK/signal-cli/releases
2. Register or link your number:
   ```bash
   signal-cli -u +1234567890 register
   signal-cli -u +1234567890 verify 123456
   ```
3. Export your number and an optional allowlist:

```bash
export SIGNAL_NUMBER="+1234567890"                        # your registered sender number
export SIGNAL_ALLOWLIST="+0987654321,+1122334455"         # comma-separated; omit to allow any
```

## Usage

```bash
# Send a text message
python3 skills/communications/signal/scripts/send.py send "+0987654321" "Hello from Dexter!"

# Send a media attachment (image, video, document)
python3 skills/communications/signal/scripts/send.py send-media "+0987654321" /path/to/photo.jpg

# Send media with an optional caption
python3 skills/communications/signal/scripts/send.py send-media "+0987654321" /path/to/doc.pdf --caption "Q3 Report"

# List linked devices
python3 skills/communications/signal/scripts/send.py status
```

## Notes

- `SIGNAL_NUMBER` — required. The number registered with signal-cli (E.164 format, e.g. `+1234567890`).
- `SIGNAL_ALLOWLIST` — optional. Comma-separated E.164 numbers. If set, the script refuses to send to any number not in the list and prints a security warning.
- `signal-cli` must be on `$PATH` or at `/usr/local/bin/signal-cli`.
- signal-cli runs in foreground mode (`--output=json`); no daemon required.
- Attachments are passed via `--attachment`. Multiple attachments are not supported in a single call here; run the command multiple times.

From EmilioUgarte65/Dexter, Apache-2.0.

More from EmilioUgarte65/Dexter

Signals

Stars
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Forks
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Last commit (this folder)
Mar 25, 2026 (7 months ago)

From GitHub (fetched Oct 24, 2026).

Details

Version
1.0
License
Apache-2.0
First seen
Oct 24, 2026
Last checked
Oct 24, 2026

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Cite this page

signal skill. Agent Mart. https://agentmart.dev/skills/emiliougarte65-signal (last updated 2026-10-24)