Terminal Capability Detector

SkillDev tools

Detect terminal capabilities including color support, TTY status, size, and Unicode support for adaptive CLI output.

Instructions available. Your AI can read the instructions. Execution depends on the setup they require.

Account requirements not reviewed. Check the skill instructions before use; ahel provides instructions and does not run this skill.

Add ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.

Then ask your AI: use the Terminal Capability Detector skill

What this skill tells your AI

The instructions your AI receives, as published by a5c-ai/babysitter in library/specializations/cli-mcp-development/skills/terminal-capability-detector/SKILL.md and read by ahel’s review.

Detect terminal capabilities for adaptive CLI output.

Capabilities

Detect color support levels
Check TTY status
Get terminal dimensions
Detect Unicode support
Check for CI environment
Configure adaptive output

Generated Patterns

import process from 'process';
import tty from 'tty';

export interface TerminalCapabilities {
  isTTY: boolean;
  colorLevel: 0 | 1 | 2 | 3;
  supportsUnicode: boolean;
  columns: number;
  rows: number;
  isCI: boolean;
}

export function detectCapabilities(): TerminalCapabilities {
  const isTTY = tty.isatty(1);
  const isCI = Boolean(process.env.CI || process.env.CONTINUOUS_INTEGRATION);

  let colorLevel: 0 | 1 | 2 | 3 = 0;
  if (isTTY && !process.env.NO_COLOR) {
    if (process.env.COLORTERM === 'truecolor') colorLevel = 3;
    else if (process.env.TERM?.includes('256color')) colorLevel = 2;
    else if (process.env.TERM && process.env.TERM !== 'dumb') colorLevel = 1;
  }

  const supportsUnicode = process.platform !== 'win32' ||
    process.env.WT_SESSION ||
    process.env.TERM_PROGRAM === 'vscode';

  return {
    isTTY,
    colorLevel,
    supportsUnicode,
    columns: process.stdout.columns || 80,
    rows: process.stdout.rows || 24,
    isCI,
  };
}

Target Processes

cross-platform-cli-compatibility
cli-output-formatting
progress-status-indicators

Signals

GitHub stars: 2k
Forks: 112
Last commit: Sep 2026

Advanced

Item type: skill
Key: terminal-capability-detector
Source: github.com/a5c-ai/babysitter

github.com/a5c-ai/babysitter