remove cancel_event artifacts from rebase merge

Restore clean async-first versions of files contaminated by
non-conflicting hunks from the skipped cancel_event commit.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Add interrupt mode for human-in-the-loop agent steering (#14)

Allow users to press Ctrl+C during a CLI agent run to pause after the
current operation (LLM call or tool execution) completes, inject a
message into the conversation, and resume. Double Ctrl+C hard-aborts.

Enabled by default; disable with --disable-interrupt or
agent.enable_interrupt=false in config.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Bump version to v0.1.8

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Fix race condition in RateLimitCoordinator.wait_if_paused

Check cancel event before entering the wait loop, so a pre-set cancel
is honored even if the backoff timer fires first.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

bump to v0.1.6 with eval system

Release v0.1.3