Description

When using Prompt.select with choices that have long descriptions that wrap across terminal lines, navigating up/down causes duplicate prompt lines to appear instead of updating in place.

Reproduction

1. Create a file repro.ts:

import { Prompt } from "@effect/cli"
import { NodeContext, NodeRuntime } from "@effect/platform-node"
import { Effect } from "effect"

const program = Effect.gen(function* () {
  const choice = yield* Prompt.select({
    message: "Select option:",
    choices: [
      { title: "opt-1", value: "a", description: "This is a very long description that will wrap to multiple lines in a narrow terminal window causing rendering issues" },
      { title: "opt-2", value: "b", description: "Another long description that exceeds typical terminal width and causes wrapping when displayed" },
      { title: "opt-3", value: "c", description: "Yet another verbose description to demonstrate the rendering bug in the select prompt" },
    ],
  })
  yield* Effect.log(\`Selected: \${choice}\`)
})

program.pipe(Effect.provide(NodeContext.layer), NodeRuntime.runMain)

2. Resize your terminal to < 80 columns (narrow enough that descriptions wrap)

3. Run: npx tsx repro.ts

4. Press up/down arrows to navigate between options

Expected: Prompt updates in place, single line for "Select option:"

Actual: Each navigation prints a new prompt line:

? Select option: › 
? Select option: › 
? Select option: › 
? Select option: › 

Root Cause

In packages/cli/src/internal/prompt/select.ts, the handleClear function calculates lines to erase incorrectly:

const text = "\n".repeat(Math.min(options.choices.length, options.maxPerPage)) + options.message
const clearOutput = InternalAnsiUtils.eraseText(text, columns)

Problem 1: Uses empty newlines to represent choices. eraseText counts 1 row per empty line, but actual rendered choices have content (prefix + title + description) that may wrap to multiple terminal rows.

Problem 2: The clear handler ignores state:

clear: () => handleClear(opts)  // state ignored

But descriptions are only rendered for the selected choice (in renderChoiceDescription):

if (!choice.disabled && choice.description && isSelected) { ... }

Without knowing state, handleClear can't determine which choice line includes a description and will wrap.

Expected Behavior

The prompt should clear and redraw cleanly when navigating, regardless of description length or terminal width.

Environment

• @effect/cli version: 0.72.1
• Platform: macOS/Linux
• Terminal: Any terminal with width < total line length