v1.1.1

feat: headless loop driver (claude -p) — live-validated; v1.1.1

Rebuilt the loop to run each iteration headless via
`claude -p --output-format json` instead of typing into an interactive REPL +
Stop hook. Robust (no REPL/TUI fragility, no hook), exact per-iteration cost
from the JSON, context via --resume.

Validated live on this repo: a real claude agent created and verified a file
in 1 iteration ($0.2404). Also unsets a depleted ANTHROPIC_API_KEY that
shadows the working login.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>