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Finding · gemini-cli

Gemini CLI: Session Resume Reliability Fix

What Changed

PR #26577 fixes session resume behavior for legacy session JSON files:

  • Valid legacy chat JSON files (with sessionId and messages) that were previously missing from /resume and --list-sessions now appear.
  • --resume <sessionId> failures no longer silently start a new session; the error surfaces correctly.

Operator Consequence

Operators who relied on --resume with legacy session formats may have been unknowingly starting fresh sessions instead of resuming. This fix makes resume failure explicit and makes legacy sessions discoverable.

Context

This directly affects the session export/import capability noted in the prior finding (2026-05-11-gemini-subagent-protocol-and-session-portability). The export/import feature is more reliable after this fix.

Finding metadata

Confidence
high
Actionability
test
Accessibility impact
low
Operator relevance
medium
Bitter relevance
low

Run: 2026-05-12-partial-cycle-gemini-refresh-2026-05-12-frontier-v0

Finding ID: 2026-05-12-gemini-session-resume-reliability

Accepted signals

Profile citations

Source links

Primary links, including exact changelog lines when available.

  1. Gemini CLI
    commit_diff_reviewedPR #26577 — fix(cli): restore resume for legacy sessionsgithub.com/google-gemini/gemini-cli/pull/26577