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Author: teliaz

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Stop Vibing Your RAG Pipeline: Recall@k, MRR, and NDCG in an Afternoon

Posted on September 28, 2026September 29, 2026 teliaz

Most teams that ship a retrieval-augmented generation feature never measure it. The demo looks good, a few hand-picked questions return

Continue readingStop Vibing Your RAG Pipeline: Recall@k, MRR, and NDCG in an Afternoon

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Structured Logging in Go With slog: Handlers, Sampling, and Dynamic Levels

Posted on September 28, 2026September 29, 2026 teliaz

A request fails at 2 AM. The on-call engineer greps through logs looking for a trace ID, finds seventeen lines

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Your Transformer Can Hold Two Thoughts at Once: The New Linear Superposition Result

Posted on September 27, 2026 teliaz

Run two unrelated documents through a large language model at the same time, and you assume the model keeps them

Continue readingYour Transformer Can Hold Two Thoughts at Once: The New Linear Superposition Result

Cat Links Software Engineering

Trending GitHub Repos This Week: Typed Decision Models Take Over the Trending Page

Posted on September 27, 2026September 28, 2026 teliaz

Another week, another pile of repositories crossing the ten-thousand-star mark in days. Most weekly roundups stop at the star count,

Continue readingTrending GitHub Repos This Week: Typed Decision Models Take Over the Trending Page

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PgBouncer 1.26.0: Pre-Auth CVEs, the search_path Fix, and What Changes for Pool Sizing

Posted on September 25, 2026September 27, 2026 teliaz

PgBouncer has quietly become mandatory infrastructure for PostgreSQL at scale. If you run more than a few hundred client connections

Continue readingPgBouncer 1.26.0: Pre-Auth CVEs, the search_path Fix, and What Changes for Pool Sizing

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Free-Threaded Python Is Now Officially Supported: What PEP 779 Changes and What It Costs

Posted on September 25, 2026 teliaz

Python 3.13 gave us something Python developers had wanted for decades: a build of CPython with no Global Interpreter Lock.

Continue readingFree-Threaded Python Is Now Officially Supported: What PEP 779 Changes and What It Costs

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Secrets Management Beyond Environment Variables: Vault, SOPS, Sealed Secrets, and Rotation That Works

Posted on September 24, 2026 teliaz

Every team starts with environment variables because every framework supports them. A DATABASE_URL in a .env file, a compose file

Continue readingSecrets Management Beyond Environment Variables: Vault, SOPS, Sealed Secrets, and Rotation That Works

Cat Links Software Engineering

Prometheus Cardinality Explosions: Why Your Monitoring Server Ran Out of Memory

Posted on September 24, 2026 teliaz

Every Prometheus outages post-mortem tells the same story in a slightly different costume. The server ran fine for months, then

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Cat Links Software Engineering

Five Code Gems From Quake, Redis, Linux, Python, and SQLite — and What They Teach

Posted on September 24, 2026 teliaz

Some code teaches you an algorithm. Some code teaches you a way of thinking. The snippets below are in the

Continue readingFive Code Gems From Quake, Redis, Linux, Python, and SQLite — and What They Teach

Cat Links Software Engineering

HyperLogLog: Counting a Billion Uniques in 1.5 KB of Memory

Posted on September 23, 2026 teliaz

Every analytics dashboard has one question that looks trivial and isn’t: how many unique users did this? You can run

Continue readingHyperLogLog: Counting a Billion Uniques in 1.5 KB of Memory

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