Your Agent Graded Its Own Exam: Why CI Passes but Production Breaks

• Hook 'graded its own exam' is original and sticky — earns attention without hype
• Core mechanism is precisely named: same context window → mocks reflect the code, not the contract. This is the rare insight that feels earned, not summarized from a blog post
• TypeScript jest.mock block is syntactically valid and the focusLines (3,4,10) correctly target the fabricated return value — technical credibility holds
• s4 before/after is the visual anchor and it works: 'fetchUser(validId)' vs 'null, expired token, 404, rate limit' is a concrete contrast, not a vague claim
• CTA is actionable but slightly underspecified — 'write tests before the agent touches implementation' is the right directive but doesn't say what that looks like in Cursor/Claude Code (failing test file first, then agent fills impl). One more sentence would close the loop for the target audience
• s6 warning scene is strong on copy but broll 'server rack red alert blinking' is generic stock-footage territory — a real Sentry trace or error log screenshot would be harder and better
• No banned content, no hype, no fake benchmarks — clean

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