Software engineer in Berlin, currently at BeeHealthy. Most of what I build lives in the gap between developers and their AI agents — making the context smaller, the feedback tighter, and the tooling honest about what it actually did.
I write about it at pecan.si — agents, Rust, open source, and the occasional detour.
| Project | ★ | |
|---|---|---|
| tokf |  |
Declarative TOML pipelines that compress CLI output before it reaches an LLM context — 60–90% fewer tokens. tokf.net |
| rable |  |
A from-scratch GNU Bash 5.3 parser in Rust, ~10× faster than Parable, with PyO3 bindings. The parsing backend in tokf. |
| upsert |  |
Spring Data JPA extension adding native upsert operations for PostgreSQL and MySQL. |
| cargo-dupes |  |
Cargo subcommand that finds duplicate and near-duplicate code via AST normalisation. |
| cargo-lint-extra |  |
Configurable Rust lints beyond rustfmt and Clippy. |
| share-the-mark |  |
Browser extension that turns an annotated live page into a Markdown brief for a coding agent. |
- Agent tooling — context compression, routing, and measurement: ccroute, boarder, mcp-coder-bench, rusted-claude-meter
- Rust — CLIs, parsers, and small sharp tools
- JVM & Kotlin — Spring Data, Gradle plugins, coverage and build tooling
- Developer experience — the unglamorous parts: builds, caches, linting, CI
Colours and the peanut borrowed from my own site, Mixed Nuts.