Articles on bioacoustics, education technology, and software engineering.https://fairy-pitta.net/enhttps://fairy-pitta.net/blog/fiscal-month-hell/https://fairy-pitta.net/blog/fiscal-month-hell/Calendar month, fiscal month, relative month. In accounting systems, 'month' means three different things, and confusing them cost me weeks of rework.Sun, 05 Apr 2026 00:00:00 GMTArchitectureDomain DesignDjangoBackendhttps://fairy-pitta.net/blog/clean-architecture-frontend/https://fairy-pitta.net/blog/clean-architecture-frontend/I tried slapping the full onion onto a frontend codebase. It didn't go well. Here's why feature-sliced thinking beats layered abstractions for most UI work.Sat, 04 Apr 2026 00:00:00 GMTArchitectureFrontendReactClean Architecturehttps://fairy-pitta.net/blog/dependency-injection-explained/https://fairy-pitta.net/blog/dependency-injection-explained/I looked up dependency injection at least five times before it stuck. Here's the mental model that finally made it permanent.Fri, 03 Apr 2026 00:00:00 GMTArchitectureDesign PatternsPythonBackendhttps://fairy-pitta.net/blog/uuid-vs-int-primary-key/https://fairy-pitta.net/blog/uuid-vs-int-primary-key/I've been through this debate on multiple projects now. Here's what I've learned, what I'd pick today, and why UUIDv7 changes everything.Thu, 02 Apr 2026 00:00:00 GMTDatabasePostgreSQLArchitectureBackendhttps://fairy-pitta.net/blog/cicd-aws-oidc-seven-walls/https://fairy-pitta.net/blog/cicd-aws-oidc-seven-walls/I just wanted to push to dev and have it deploy. OIDC, SSM, Git ownership errors, nested quote issues — every single step broke. Here's the full debugging log.Wed, 01 Apr 2026 00:00:00 GMTAWSCI/CDGitHub ActionsDevOpshttps://fairy-pitta.net/blog/github-actions-minutes-budget/https://fairy-pitta.net/blog/github-actions-minutes-budget/I burned through 21 PRs in a single day and killed the CI budget. Here's what I learned about GitHub Actions billing the hard way.Tue, 31 Mar 2026 00:00:00 GMTCI/CDGitHub ActionsDevOpsPerformancehttps://fairy-pitta.net/blog/why-i-built-portree/https://fairy-pitta.net/blog/why-i-built-portree/Managing multiple dev servers across git worktrees was annoying, so I built a CLI to automate it.Fri, 06 Feb 2026 00:00:00 GMTDeveloper ToolsGoGithttps://fairy-pitta.net/blog/testing-birdnet-with-singapore-birds/https://fairy-pitta.net/blog/testing-birdnet-with-singapore-birds/Evaluating BirdNET’s accuracy on common Singaporean birds reveals strengths and weaknessesSun, 18 May 2025 00:00:00 GMTBirdNETbioacousticshttps://fairy-pitta.net/blog/bird-sound-classification-in-singapore/https://fairy-pitta.net/blog/bird-sound-classification-in-singapore/A quick look at the bioacoustics challenges in SingaporeTue, 06 May 2025 00:00:00 GMTDeep ResearchbioacousticsSingaporehttps://fairy-pitta.net/blog/bird-sound-classification-in-data-sparse-regional-context/https://fairy-pitta.net/blog/bird-sound-classification-in-data-sparse-regional-context/Bird Sound Classification in Data-Sparse Regional Contexts: Literature ReviewMon, 05 May 2025 00:00:00 GMTDeep Researchbioacousticsdata analysishttps://fairy-pitta.net/blog/tools-for-bird-acoustic-monitoring/https://fairy-pitta.net/blog/tools-for-bird-acoustic-monitoring/Bird monitoring tools are transforming conservation across Southeast AsiaSun, 27 Apr 2025 00:00:00 GMTDeep Researchbioacousticshttps://fairy-pitta.net/blog/change-in-bird-vocalization/https://fairy-pitta.net/blog/change-in-bird-vocalization/A quick look at the changes in bird vocalizations between urban and forestSat, 26 Apr 2025 00:00:00 GMTDeep Researchbioacoustics