https://sachinsmc.me/blog/posts/ Recent content in Posts on Sachin Chavan Hugo en-us Tue, 23 Jun 2026 12:00:00 +0400 https://sachinsmc.me/blog/posts/turboquant-data-free-quantization/ Tue, 23 Jun 2026 12:00:00 +0400 https://sachinsmc.me/blog/posts/turboquant-data-free-quantization/ Google’s TurboQuant compresses LLM KV caches and embedding vectors to 3-4 bits with no training and no codebook, and still beats methods that need both. The clever part is not the quantizer, it is what it refuses to store. Here is the intuition, with runnable NumPy you can paste and check. https://sachinsmc.me/blog/posts/fake-web3-job-rce-malware/ Mon, 22 Jun 2026 12:00:00 +0400 https://sachinsmc.me/blog/posts/fake-web3-job-rce-malware/ A LinkedIn ‘investor’ offered me a $70-120/hr Web3 job and sent a ‘skill assessment’ repo with a 2-3 hour deadline. The moment its server boots, it fetches code from an attacker’s machine and runs it with full Node.js privileges. I recognized the trap, told him I’d run it (I hadn’t), and handed him back his own command-and-control link. Here is the full teardown. https://sachinsmc.me/blog/posts/llm-relay-openai-gateway-go/ Sun, 21 Jun 2026 12:00:00 +0400 https://sachinsmc.me/blog/posts/llm-relay-openai-gateway-go/ I just shipped llm-relay, a small OpenAI-compatible LLM gateway in pure Go (zero third-party dependencies). The interesting part is the failover: when a provider is rate-limited or down, it switches to the next one BEFORE any bytes reach the client, so the caller never sees half a stream and then a different model. Here is how it works, with the real code. https://sachinsmc.me/blog/posts/multi-tenant-rag-authorization-boundary/ Sat, 20 Jun 2026 12:00:00 +0400 https://sachinsmc.me/blog/posts/multi-tenant-rag-authorization-boundary/ In a single-tenant RAG you trust the index. In a multi-tenant one, a shared index plus one missing filter leaks Tenant A’s documents into Tenant B’s answer. Here is the unified mental model that ties the metadata-filtering mechanics and the authorization layer together, treat the tenant filter as a policy decision, not app code, with the same architecture mapped across AWS, Azure, and Google Cloud (diagrams and Python included). https://sachinsmc.me/blog/posts/distributed-systems-field-guide/ Fri, 19 Jun 2026 12:00:00 +0400 https://sachinsmc.me/blog/posts/distributed-systems-field-guide/ Most of what makes a distributed system good is a handful of disciplined separations plus a real respect for the tail. To make that concrete, we design a small identity graph service from scratch, the same shape of system Airbnb runs at 7 billion nodes, and watch each principle earn its place. Node.js snippets included.