https://sparticleloop.dev/ Field notes from building with agents. https://sparticleloop.dev/posts/the-instrument-turned-on-itself/https://sparticleloop.dev/posts/the-instrument-turned-on-itself/Thu, 30 Jul 2026 12:00:00 GMTEvery number in this series was measured from real session logs by the same kind of reader Spectroscope ships: 490M billable tokens across 2,388 session files, as of this writing. The instrument had to pass its own audit first. https://sparticleloop.dev/posts/ship-week/https://sparticleloop.dev/posts/ship-week/Wed, 29 Jul 2026 12:00:00 GMTFour days after going public: signed artifacts on Maven Central, a Python edition that reproduces the Java wire format byte for byte, a native OTel exporter, and an edu-suite that teaches the tool. The voice rule for all of it: a laboratory instrument, not AI hype. https://sparticleloop.dev/posts/the-same-day-pivot/https://sparticleloop.dev/posts/the-same-day-pivot/Tue, 28 Jul 2026 12:00:00 GMTOne project ends and its successor begins inside twenty-four hours. Two jury rounds reject seventy-two name candidates before physics wins, and a six-phase migration flips the repo public, bit-identical and verified from an anonymous account. https://sparticleloop.dev/posts/one-core-many-faces/https://sparticleloop.dev/posts/one-core-many-faces/Mon, 27 Jul 2026 12:00:00 GMTA ten-stage teaching workshop built a harness from scratch, and one design decision carried the whole course: a typed JSONL event stream that is API, storage format, UI protocol and audit log at once. https://sparticleloop.dev/posts/survey-the-field/https://sparticleloop.dev/posts/survey-the-field/Sun, 26 Jul 2026 12:00:00 GMTTwo survey generations, seventeen framework profiles, fifteen repositories pinned at exact commits. The conclusion was to adopt none of them: borrow the vocabulary, take no dependencies. https://sparticleloop.dev/posts/a-habit-of-watching/https://sparticleloop.dev/posts/a-habit-of-watching/Sat, 25 Jul 2026 12:00:00 GMTBefore there was a product, there was a 300-line habit: split every agent session into a reading view and an audit trace. One parse produces two views, and no LLM sits anywhere in the loop. Everything since grew out of that split.