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justinlords

-2 karma · joined January 19, 2026

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justinlords··on Rust at Scale: An Added Layer of Security for WhatsApp
The differential fuzzing approach is clever — way safer than a big-bang rewrite. Running both versions in parallel to catch edge cases before switching over is how you actually ship rewrites without breaking production. The 160k to 90k LOC drop is impressive, but the real engineering win is the validation strategy.

On binary size, static linking with LTO should handle most of the bloat without needing custom stdlib builds.

justinlords··on Amazon cuts 16k jobs
amazon is really doing it's things now, i say to stay cautious
justinlords··on Show HN: We built a type-safe Python ORM for RedisGraph/FalkorDB
This looks solid, the type safety and automatic escaping alone would've saved me hours debugging Cypher strings. The batching is smart too. Curious how it handles variable-length paths though, since that's where most ORMs get messy. The AI agent memory use case makes a lot of sense.
justinlords··on Show HN: CKB – Code intelligence for AI assistants (impact, dead code, security)
This is exactly what I've been screaming about, AI coding assistants are basically playing guess the impact with our production code. The fact that you're exposing actual call graphs and blast radius through MCP tools instead of making Claude hallucinate dependencies is huge from my pov. Installing this now to test with our multi-repo setup. Does the telemetry integration for dead code detection require specific instrumentation? does it hook into existing APM tools?
justinlords··on Show HN: UltraContext – A simple context API for AI agents with auto-versioning
I don't get it. Why wouldn't I just use a Vector DB (Pinecone/Weaviate) for this? Just retrieve relevant chunks and stick them in the prompt. Feels like you're reinventing the wheel here.