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 policy reversal 71 minutes after the last of them 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.