Open Source

In our earlier architecture deep-dives, we examined how Attention Dilution cripples autonomous coding agents. As context windows swell past tens of thousands of tokens with terminal traces, compiler diagnostics, and speculative file edits, an agent’s attention mechanism degrades. Critical system constraints, architectural decision records (ADRs), and testing invariants drift into the periphery, leading to hallucinations, ignored instructions, and silent error suppression. To solve this in Google Antigravity, we built the Antigravity Attention Guard Plugin—a deterministic runtime firewall that enforces subagent delegation, sandboxed tool execution, and cryptographic ledger tracking. ...

In our previous discussions on autonomous engineering, we explored the phenomenon of Attention Dilution—the silent degradation of instruction-following fidelity as context windows swell past tens of thousands of tokens. While modern frontier models boast context windows of 1M+ tokens, attention mechanisms remain vulnerable to informational entropy. As terminal logs, stack traces, and code diffs accumulate, system prompt constraints drift out of the model’s active attention focus. When left unchecked, agents exhibit architectural amnesia: they bypass project-level Architecture Decision Records (ADRs), run uncompressed shell commands that flood context, guess port allocations, or skip verification steps. ...

In my previous post, I detailed the mathematical realities of “Attention Dilution” in LLMs with massive context windows, and how we engineered deterministic lifecycle hooks to prevent autonomous agents from suffering architectural amnesia. Today, I am thrilled to announce that we have packaged that exact solution into a fully open-source, cross-platform Antigravity Plugin. You can now instantly secure your own agents by cloning the Antigravity Attention Guard Plugin directly into your configuration. ...