antigravity-plugin 2.0.0

2.0.0 is a major release. task and rescue with no --effort flag now
send medium to agy. Through 1.3.0 they sent no flag, and agy used whatever
that machine had saved. Pass --effort agy-default if you want the plugin
to send no flag, so your own agy configuration decides. Pass --effort low,
medium, or high to send that value. medium runs longer than low, so
a flag-less job is more likely to reach the plugin execution budget and be
stored as failed with no answer. Raise ANTIGRAVITY_AGY_TIMEOUT_MS if you
need more time.

A SUCCESS run that returns an empty answer is now failed (exit 1 on the
foreground path). That includes a denial carried only in agy's JSON, and an
empty answer with no denial and no print-timeout marker. Through 1.3.0 those
runs were reported as completed with nothing in them. A non-empty answer
with a denial stays completed, and the denial is a warning.

The 2.x contract is in docs/COMPATIBILITY.md. The
full list is in CHANGELOG.md.

Also in this release

• Denied-action reporting now includes the target agy refused, joined by
  action name from the step_update error message.
• A denied run now reports agy's own conversation id, so a caller can resume
  the same conversation with --conversation <id> after doing the step
  themselves.
• The plugin no longer repeats agy's --dangerously-skip-permissions
  bypass advice on its own stderr. The stored result still keeps the
  complete upstream line.
• Print-timeout truncation and agy's error: fatal marker are reported
  instead of passing silently.
• The vision MCP view_image schema sets additionalProperties: false.
• The README How-it-works figure is an authored SVG, and the pack check
  requires that image in the tarball.
• The tested agy range is 1.1.15 to 1.2.1. Newest measured: 1.2.1.