clackPrompter now wraps each prompt's validate with the tested
validateWithHelpEscape helper so a lone "?" short-circuits format checks,
then intercepts it post-prompt: it calls offerClaudeHandoff with the run's
channel + step context and the prompt question, then re-asks the same
prompt. Recursion is operator-bounded. Gated on a TTY, so a headless /
non-TTY run is a no-op (no interactive child spawned).
The channel + step label are plumbed through RunSkillOptions → runSkill →
clackPrompter, and run-channel-skill threads the channel it is wiring so
the handoff has the right context. An injected prompter is unaffected (the
injector owns its I/O).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
gavrielc
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