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Antigravity 2.5.5: certificate expired, agent execution terminated

Antigravity IDE 2.5.5 reports certificate has expired and Agent execution terminated. Check the installed version, preserve changes, and use the supported update path.

Quick answer

Reports about Antigravity IDE 2.5.5 on November 3, 2026 describe an expired certificate in its bundled local language-server connection and an agent that stops immediately. Check your installed version and local log. Preserve the workspace changes, then update through the product's normal update channel. A Google AI Developers Forum reply recommends 2.6.0 for this case; confirm the update actually restores your workflow before repeating the task.

Exact signals and version boundary

The primary Windows report shows Agent execution terminated due to error after roughly one second and a bundled certificate ending on November 3. Another reporter saw certificate has expired on 127.0.0.1 in logs. These observations concern the reported 2.5.5 installation; the visible agent error by itself does not prove that every Antigravity version has the same certificate problem.

Safe checks before repeating work

  1. Record the IDE version, operating system, full error, and timestamp. Check the local log for a certificate-expiry line; if it is absent, do not force this diagnosis.
  2. Inspect changed files and any commands or external actions already completed by the agent. Save the unfinished prompt. Update from an official product channel and restart the IDE, then try a short, disposable task before continuing the original work.
  3. If review controls changed after the update, inspect the actual diff and accept or reject changes deliberately. Forum users disputed whether 2.6.0 preserved their preferred inline-review flow; updating the certificate problem does not settle that usability concern.

The original thread includes a script that disables TLS certificate verification. Do not use that script as a standard fix: disabling verification removes a security check. Reinstalling the same 2.5.5 build may leave the expired bundled certificate unchanged, according to the forum reply.

Frequently asked questions

Is my account suspended?

A local certificate has expired log points to a different issue. An account restriction would need its own exact notice.

Will updating restart the unfinished agent task?

Do not assume so. Inspect the workspace and resume from verified state.

Why does the agent stop after one second?

That timing matched one reporter's 2.5.5 case. Check your version and log before attributing your stop to the same certificate.

Can I bypass certificate checks temporarily?

The community script reduces connection verification. Use an official update path and preserve your work instead.

Sources