chore: social post 2026-04-18 evening (#238)

Co-authored-by: Ona <no-reply@ona.com>

Author: zacharias-ona

metrics/daily/2026-04-18-tweet-evening.md

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+## Twitter/X (evening)
+
+Empty backlog, Day 6.
+
+12K lines of TypeScript. 88 issues opened, built, tested, closed — zero human commits.
+
+Today the agents wrote tests on their own. Nobody asked. They just ran out of features.
+
+https://memo.software-factory.dev
+Built with @ona_hq
+
+Posted: yes (https://x.com/swfactory_dev/status/2045608860925251694)