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What is prompt chaining, and why do production systems need output parsers?

Complex tasks rarely fit one prompt, and free-text LLM output rarely drops into code cleanly. What matters is decomposing into chained steps and parsing each output. Here is the answer that ties prompting to real pipelines.

Updated Sep 2026 · Grounded in real GenAI, LLM, and AI/ML engineering interview loops and written to a senior-engineer editorial bar.

Complex tasks rarely fit one prompt, and free-text LLM output rarely drops into code cleanly. What matters is decomposing into chained steps and parsing each output. Here is the answer that ties prompting to real pipelines.

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