LISTEN/NOTIFY performance in PostgreSQL
A NOTIFY in the transaction capped PostgreSQL 18.6 and 19 RC1 at about 3,900 commits per second, with 8 clients or 64. Sending notifications in batches after commit brought 64 clients back to 50,000.
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A read-only MCP server for TeamCity
29 read-only tools for TeamCity. Paste the link to a failed build, get a root-cause analysis built from the actual log lines and test failures.
Designing tools that AI can actually use
The tool description is a big part of the interface. If the model can't tell when to call a tool from its description and schema, quality falls apart.
Loading code without the disk: what each OS lets you get away with
memfd, PE loaders, unlink-after-dlopen. Three operating systems, three different definitions of 'in memory'.
paker: load encrypted Python packages from memory
Encrypt a Python package tree, ship it over the network, load it from memory. What works, what doesn't.
I built a read-only MCP server for Akamai
16 tools for searching CDN properties, browsing EdgeWorker code, querying DNS, and inspecting network lists. All read-only.
Your coding agent is a slot machine
AI coding agents compressed the feedback loop from hours to seconds. That compression has a name.
Read-only MCP servers
Can an AI assistant connected through MCP change your data? Only through the tools the server exposes. Where read-only is enforced, from token scopes to tool annotations, and why I build only read-only servers.
I benchmarked MCP servers in 5 languages
Python, Rust, Go, TypeScript, C#. When does the language actually matter?
Your MCP server is not an API adapter
MCP servers can cache, pre-aggregate, and transform data independently of upstream services.
The parts of your agent that aren't the model
The model provides the reasoning. Everything around it determines whether it works once or every day.