AWS · DATA · AI ARCHITECTURE
Architecture you can build on.
I’m Mohamed Abbas. I write about the decisions behind cloud systems, with practical AWS projects, diagrams and code you can explore.
FEATURED PROJECT
See your EMR output before you merge
Run the base and candidate transformations against the same input, then review the difference before the change reaches production.

Latest articles
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A passing agent evaluation proves less than you think
A grounded, plausible answer scored 1.0 twice and was still wrong. Six questions to ask before you trust any agent evaluation score, drawn from…
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HTTP 200, Wrong Answer: Testing Agent Evaluations with CloudWatch Omni
A stale policy produced a grounded but wrong answer—and two passing AgentCore scores. A real CloudWatch Omni lab tests what an independent freshness check…
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Your replica copied the bad DELETE. Now recover the orders that came next.
Recover an analytical orders table after a bad DELETE using S3 Tables snapshots, retained source events and a validated cutover.
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