TL;DR : My web-agent used itself to publish 2 blog posts to dev.to (full dogfooding story). But when I asked it to edit the already-published article to add a cross-link, it ran 7 steps before V0.5.0 anti-loop hard-aborted. The 5-action actuator (click/type/scroll/extract/done) lacks keyboard_shortcut / paste / textarea range API. Failure itself is data . 7 sections + 2 mermaid figures (capability-boundary flowchart + spike-and-decide flowchart). Full version (with V0.16.31 dogfooding 4/5 = 80% E2E success rate cumulative table + V0.17+ trigger conditions): https://github.com/franciseliang99-dot/web-agent/blob/main/docs/blog-drafts/2026-05-build-vs-edit-time-final-en.md Project repo (MIT, ⭐ welcome): https://github.com/franciseliang99-dot/web-agent Series : https://dev.to/francise_liang_e4544eadb9/50-compliance-not-0-how-a-logging-spike-almost-triggered-the-wrong-architecture-rewrite-1lna — measurement layer…