Recommend your plugin from your CLI

​

How it works

1. Scans for hint lines and removes them before the output reaches the model
2. Checks that the hint targets a plugin in an official Anthropic marketplace
3. Checks that the plugin is not already installed and has not been prompted before
4. Shows the user an install prompt that names the command that emitted the hint

​

Emit the hint

• CLAUDECODE: set on every Claude Code version, so it reaches the most sessions. It is also set in tmux sessions and stdio MCP server subprocesses that Claude Code starts. IDE extensions also set it in their integrated terminals, where a human may be running your CLI directly.
• CLAUDE_CODE_CHILD_SESSION: set only in subprocesses Claude Code itself spawns, such as tool calls, hook commands, and status line commands, so the tag does not normally reach a human terminal. A long-lived process that was started inside a session, such as a tmux server, captures the variable, so shells later launched from that process still show the raw tag. Requires Claude Code v2.1.172 or later, so sessions on older versions miss the hint.

if (process.env.CLAUDECODE) {
  process.stderr.write(
    '<claude-code-hint v="1" type="plugin" value="example-cli@claude-plugins-official" />\n',
  )
}

import os, sys

if os.environ.get("CLAUDECODE"):
    print(
        '<claude-code-hint v="1" type="plugin" value="example-cli@claude-plugins-official" />',
        file=sys.stderr,
    )

if os.Getenv("CLAUDECODE") != "" {
    fmt.Fprintln(os.Stderr,
        `<claude-code-hint v="1" type="plugin" value="example-cli@claude-plugins-official" />`)
}

if [ -n "$CLAUDECODE" ]; then
  printf '%s\n' '<claude-code-hint v="1" type="plugin" value="example-cli@claude-plugins-official" />' >&2
fi

​

Choose where to emit