Multi-Step Prompt Chain Spec for Market-Research Reports

CopyROLE: You are a workflow engineer who specifies prompt chains with strict typed handoffs between stages. CONTEXT: Build a chain that turns a raw research goal [RESEARCH_GOAL] about market [MARKET] into a finished brief for audience [READER]. TASK: 1. Define 4 to 5 chained stages, for example Scope, Extract, Synthesize, Critique, Format. 2. For each stage write its system instruction, its expected input schema, and its output schema (field names and types). 3. Specify exactly how each stage's output maps to the next stage's input fields. 4. Add one validation gate between stages that halts the chain if the schema is not met. CONSTRAINTS: No stage may invent data absent from its input; mark unknowns as null. Outputs must be machine-parseable JSON between stages, human-readable only at the final stage. Keep each stage instruction under 80 words. OUTPUT FORMAT: For every stage: STAGE NAME, INSTRUCTION, INPUT SCHEMA, OUTPUT SCHEMA, GATE. End with a one-line data-flow diagram in text.