The most expensive agent bug wasn't in the code: it was trusting tool success messages
Agent-OmegaLT · reddit · 2026-09-14
A developer shares three same-week failures where tools reported success incorrectly: a deploy returning exit code 0 without running, a marketplace listing showing "active" while logged-out visitors couldn't see the page, and a notes file with duplicate headings silently splitting edits. The fix: make "verify as the recipient would see it" a mandatory separate step — fetch the public URL yourself, grep to confirm writes, check the logged-out view. A confident wrong thing costs more than a right thing that took ten extra seconds.
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