The first sprint produced something that worked. The second sprint produced something that was good. The third sprint produced something Jay was proud of, and he hadn't written a line of it.
The goal was ambitious: a Go service that ingested webhook events from multiple sources—GitHub, Slack, PagerDuty—normalized them into a common event schema, applied configurable routing rules, and forwarded them to downstream consumers via both HTTP and message queues. The GOAL.md was a full page. The interview phase generated twenty-three questions.
Sprint one focused on the core pipeline. The event ingestion layer. The normalization engine. The basic routing logic. The agents produced a service that could receive a GitHub webhook, normalize it, and route it to an HTTP endpoint. It compiled. It ran. The tests passed. And the assessment said: incomplete.
The assessment was specific. Slack and PagerDuty sources were not yet implemented. The message queue output was missing. The routing rules were hardcoded instead of configurable. Three gaps, clearly identified, each one scoped for the next sprint.
Sprint two added Slack and PagerDuty ingestion. The normalization engine was extended to handle their event formats. The message queue output was implemented using a clean producer interface. The routing configuration was moved to a YAML file. More tests. More integration coverage. The assessment ran again.
Incomplete. One gap remaining: the GOAL.md had specified configurable routing rules, but the current YAML configuration didn't support conditional routing based on event attributes. The assessment identified this with surgical precision, quoting the exact sentence from the GOAL.md that hadn't been satisfied.
Sprint three added conditional routing. The YAML configuration gained an expressions syntax for matching event attributes. The routing engine was refactored to evaluate conditions at runtime. The agents added tests for every combination of source, condition, and destination that the configuration syntax could express.
The assessment ran. Goal status: complete.
Jay opened the three sprint retrospectives and read them side by side. Sprint one: solid foundation but narrow scope. Sprint two: broader coverage, some technical debt in the normalization layer. Sprint three: technical debt addressed, full goal coverage, all tests passing.
"The quality improved with each iteration," Navan observed, reading over Jay's shoulder. "Sprint one's code was functional but rough. Sprint two was cleaner. Sprint three is actually elegant."
It was true. The agents hadn't just added features across three sprints. They had refined the existing code. The error handling got better. The naming got more consistent. The test patterns became more sophisticated. Each sprint's retrospective had identified areas for improvement, and the next sprint had acted on them.
Justin looked at the final codebase. "This is what compounding correctness looks like," he said. "Each iteration doesn't just add. It improves. The loop doesn't just converge on the goal. It converges on quality."
Three sprints. Forty-seven minutes total. A production-ready event routing service with configurable rules, multiple sources, multiple destinations, and comprehensive tests.
Jay bookmarked the retrospectives. They read like a short story about a piece of software growing up.
"The retrospectives read like a short story about a piece of software growing up." Jay, you're a poet and you probably know it.