Summary

Fixes two defensive issues in the Inquirerer lifecycle that contribute to a keypress bug when multiple instances share process.stdin (e.g., during pgpm init -w).

TerminalKeypress.pause() — Now resets raw mode (setRawMode(false)) when pausing. Previously, after a checkbox/autocomplete/list prompt called pause() on ENTER, raw mode remained enabled, potentially interfering with subsequent readline-based text prompts. resume() already sets raw mode to true, so this makes the pair symmetric. destroy() already did this — pause() was the odd one out.

Inquirerer.close() — Now nullifies this.rl and this.keypress after closing/destroying them. This:

• Makes double-close safe (the second call is a no-op)
• Lets prompt methods (text(), checkbox(), etc.) detect a closed instance via their existing if (!this.rl) guard and fall back to non-interactive behavior instead of calling methods on a dead readline

Companion PR: constructive-io/constructive has a separate PR that passes the existing prompter through to initModule() → scaffoldTemplate() so a second Inquirerer is never created on process.stdin in the first place.

Review & Testing Checklist for Human

• Verify pause() raw mode reset doesn't break prompt chaining: After a checkbox prompt, the next text prompt should work correctly. resume() re-enables raw mode, so keypress-based prompts following pause() should still function. Worth running pgpm init -w interactively to confirm.
• Check double-close safety: Confirm that calling prompter.close() twice (or exit() → close()) doesn't throw. Check that prompts after close() fall back to non-interactive defaults.
• Test with existing consumers: If any downstream projects call pause()/resume() directly on keypress or check for closed state on Inquirerer, verify they still work.

Test Plan

1. Run an interactive inquirerer workflow with multiple checkbox/text question types in sequence
2. Test pgpm init -w specifically (once the companion PR lands) to verify no double-echo or input conflicts
3. Verify all 137 existing inquirerer tests pass ✅ (they do)

Notes

• All 137 Jest tests pass
• pause() is called by checkbox/autocomplete/list prompts when ENTER is pressed, before resolving the promise
• This fixes the symptom but the root cause (duplicate Inquirerer on stdin) is fixed in the companion PR

Link to Devin Session: https://app.devin.ai/sessions/178a5957a56e4141bd3fd4d0a5e4a508
Requested by: @pyramation