Google Antigravity 256K Context Limit & Headless Policy Change Archive
Google Antigravity advertises and displays in its client interface a 1,048,576 (1M) token context window for Gemini 4 Argon and Gemini 3.8 Flash. However, static disassembly of the official client binaries and local SQLite session databases show that a hardcoded machine-code instruction clamps the automatic context compaction threshold at 256,000 tokens (25% of the advertised window). Around the same period, Google support staff reversed 10 prior written forum confirmations regarding local subprocess invocations of agy -p from third-party tools by updating a non-contractual FAQ page without amending the formal Additional Terms of Service (ToS).
Part 01 · Key Findings
Key Metrics & Core Findings
Cross-verified against static binary disassembly, local SQLite telemetry, and raw GitHub / Forum records
Part 02 · Binary & Telemetry Evidence
Binary Disassembly, Environment Variable Evolution & Quota Audit
Part 03 · Chronological Timeline (2025-07 — 2026-11-05)
Chronological Incident Timeline
Chronological record from the Windsurf team acquisition, 10 consecutive official compliance confirmations, and the 26.5-hour policy reversal to the 0x3e800 disassembly and today's CLI v1.5.1 release. Click any quote toggle to inspect the verbatim original text.
Part 04 · Independent Verification & Repository Index
Official Binary Hashes & Archive Directory
This repository hosts no binary executables or installers. Every analyzed official release can be downloaded directly from Google Cloud Storage and verified against the SHA-256 / SHA-512 hashes below.