[FEATURE] Allow customization of CLI spinner verbs

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Currently, the loading spinner verbs (e.g. "Thinking…", "Synthesizing…", "Spinning…") shown while Claude is processing are hardcoded in the CLI. It would be fun and useful to let users define their own set of verbs.

Proposed Solution

Add a spinnerVerbs array to settings.json (user or project level):

"spinnerVerbs": ["Winging it...", "Hallucinating...", "Scheming...", "Panicking..."]

If the key is absent or empty, the existing default verbs are used unchanged — fully backwards-compatible.

Alternative Solutions

A single static label instead of an array — simpler, but loses the variety that makes the current spinner lively.

Priority

Low - Nice to have

Feature Category

CLI commands and flags

Use Case Example

The spinner text is one of the few pieces of personality visible during long operations. Letting users customize it would allow for:

• Localization (e.g. native-language verbs)
• Team/project theming
• Personal preference or humor

Additional Context

Low-risk, purely cosmetic change with no impact on model behavior or output.