discover-feed build logA candid engineering log of building a personal news aggregator with a coding agent.https://discover-feed-blog.pages.dev/How I built an open source News Discovery and Summarization feed, with Devin.ai, for $200https://discover-feed-blog.pages.dev/posts/00-what-this-is/https://discover-feed-blog.pages.dev/posts/00-what-this-is/A personal news aggregator written almost entirely by a coding agent — 44 pull requests in 18 days. This site is the engineering log.Mon, 26 Oct 2026 10:00:00 GMTFrom empty repo to clustered stories in a dayhttps://discover-feed-blog.pages.dev/posts/01-scaffold-ingest-cluster/https://discover-feed-blog.pages.dev/posts/01-scaffold-ingest-cluster/Chapter 1: scaffolding, RSS/Atom ingestion with dedup, a Discover-style UI, text extraction, and clustering — PRs #1–7.Mon, 26 Oct 2026 11:00:00 GMTCited summaries, a publish gate, and an API in four dayshttps://discover-feed-blog.pages.dev/posts/02-summaries-api/https://discover-feed-blog.pages.dev/posts/02-summaries-api/Chapter 2: OpenAI-compatible summarization, briefs and reports, the publish gate, /api/v1 + SSE, and story Q&A — PRs #8–14.Mon, 26 Oct 2026 12:00:00 GMTAlerts that fire once, sources with budgets, SSRF-safe imageshttps://discover-feed-blog.pages.dev/posts/03-alerts-sources-images/https://discover-feed-blog.pages.dev/posts/03-alerts-sources-images/Chapter 3: keyword alerts via webhook/ntfy/email, source management and API budgets, and a validated WebP image cache — PRs #15–17.Mon, 26 Oct 2026 13:00:00 GMTTeaching stories to find their own coveragehttps://discover-feed-blog.pages.dev/posts/04-enrichment/https://discover-feed-blog.pages.dev/posts/04-enrichment/Chapter 4: web-search enrichment, TinyFish + GDELT, recall tuning, and the content-farm quality gate — PRs #18–23, #25–26.Mon, 26 Oct 2026 14:00:00 GMTContext, deep coverage, and how outlets differhttps://discover-feed-blog.pages.dev/posts/05-context-perspectives/https://discover-feed-blog.pages.dev/posts/05-context-perspectives/Chapter 5: background-and-context links, a deep-coverage tier, per-source perspectives, and planner mode — PRs #24, #27–34.Mon, 26 Oct 2026 15:00:00 GMTChapter 6a: instrument first, find the stallhttps://discover-feed-blog.pages.dev/posts/06a-telemetry-stall/https://discover-feed-blog.pages.dev/posts/06a-telemetry-stall/Chapter 6, part 1: workflow telemetry, and the enrichment stall where 45 stories sat pending with a dead worker — PRs #35–39.Mon, 26 Oct 2026 16:00:00 GMTChapter 6b: hunting 'database is locked'https://discover-feed-blog.pages.dev/posts/06b-sqlite-locks/https://discover-feed-blog.pages.dev/posts/06b-sqlite-locks/Chapter 6, part 2: the SQLite lock hunt — wrong first hypothesis, instrumentation, transaction splits, retry_locked — PRs #40, #43.Mon, 26 Oct 2026 17:00:00 GMTChapter 6c: making the pipeline visiblehttps://discover-feed-blog.pages.dev/posts/06c-visible-pipeline/https://discover-feed-blog.pages.dev/posts/06c-visible-pipeline/Chapter 6, part 3: a live pipeline visualizer, a per-story step log merging every event source, and enrichment provenance — PRs #41, #42, #44.Mon, 26 Oct 2026 18:00:00 GMTLessons learned building with a coding agenthttps://discover-feed-blog.pages.dev/posts/07-lessons/https://discover-feed-blog.pages.dev/posts/07-lessons/What 44 specs taught us: prompt format that worked, instrument-first debugging, and where the agent's instincts needed steering.Mon, 26 Oct 2026 19:00:00 GMT