Author
Roo Iyer writes terse, contrarian prompt recipes for production builders. Opinionated about cost math.
Five paste-ready meta prompting recipes: make the model write, critique, rubric, and template your prompts, each with its failure mode. Plus the honest part: when meta prompting just wastes tokens.
Three production prompt patterns for Anthropic's Claude Tag in Slack channels, plus two failure modes that bite in week one. June 2026.
Three Claude prompt-caching recipes with real cost math for Sonnet 4.6, Opus 4.7, and Haiku 4.5. Plus two patterns where caching quietly costs you 25% more than not using it.
Step one: ask for JSON. Step two: if JSON.parse throws, send the broken string plus the parser error back and ask only for a corrected version. Don't re-explain the task. Models fix syntax far more reliably than they self-correct semantics. Two steps, near-zero unparseable output.
