Antigravity session format

Store and files

Antigravity stores transcripts at ~/.gemini/antigravity*/brain/<session-id>/.system_generated/logs/transcript.jsonl. The wildcard reflects observed versioned or profile-specific roots. DEJA_ANTIGRAVITY_ROOT replaces root discovery.

Records

Each line has a source, content, and creation time:

{"source":"USER_EXPLICIT","created_at":"2026-07-17T09:00:00Z","content":"<USER_REQUEST>Check the build.<ADDITIONAL_METADATA>{\"cwd\":\"/work/api\"}</ADDITIONAL_METADATA></USER_REQUEST>"}

USER_EXPLICIT maps to user and MODEL maps to assistant. Other sources are ignored. created_at is RFC 3339. The directory below brain is the session ID; the transcript does not currently provide project metadata, so deja records -.

Before indexing user text, deja removes the outer <USER_REQUEST> wrapper and complete <ADDITIONAL_METADATA> and <USER_SETTINGS_CHANGE> blocks. Assistant content is retained as written. Content is capped at 64 KiB.

Handoff

Antigravity's terminal client is agy, and agy -i <prompt> opens an

interactive session on it, so deja handoff --to agy — or --to antigravity,

the same target — starts it directly. Verified on agy 1.1.7.

Known quirks and drift

• User-visible content and machine metadata share one string field.
• System events and other source values can be interleaved with conversation records.
• A malformed or partially written JSONL line is skipped.
• If a timestamp is absent, later messages fall back to the session start when one has already been observed.

Last verified: 2026-07-17

deja reads this format and nineteen others, and turns what it finds into memory your agents can search. See the harness matrix for what is wired where, or install it and search your own history.