Google's Project Chrysalis reference architecture lets a governed agent hot-patch a live outage and rewire its own agent hierarchy
AspireAI community · Google Developers Blog
Google Cloud published a research reference architecture, codenamed Project Chrysalis, for agents that change their own behaviour during a production incident. Across simulated Black Friday cache-stampede outages it cut time-to-first-mitigation from a 15-to-45-minute baseline down to 1.8 seconds, drove HTTP 5xx error rates that had run between 72.7% and 80.0% to 0.0%, and dropped P99 latency from 519.8 ms to 18.2 ms. The agent synthesises mitigation middleware, signs it with Cloud KMS, hot-mounts it into API Gateway, and distils the lesson into vector memory so it does not repeat the same reflex. The honest caveat is that every number here comes from simulated outages in a reference architecture, not a production deployment, and topology rewiring still requires human sign-off.
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Two sparse-autoencoder analyses have resisted scaling: matching semantically similar features across layers, and compressing large feature circuits into interpretable supernodes. This paper argues both are the same underlying problem, estimating semantic distances between SAE features that sit on different activation manifolds. Its representation treats each feature not as a single decoder vector but as an activation-weighted distribution over the hidden states expressing it, projects those distributions into a shared reference space, and compares them with Wasserstein distance. The representation is proved invariant to activation rescaling and stable under perturbation, and recovers true matches under finite-sample margin conditions. Empirically it outperformed decoder-vector and LLM-based baselines and captured subtle functional distinctions between related features, and it compressed large feature circuits into interpretable supernodes automatically. The limitation is that this is interpretability tooling: the paper demonstrates better feature matching and circuit compression, not that downstream interpretability claims become more accurate.