Declare the per-row inputs a prompt needs

A saved agent's prompt: literal text with references between the runs.

The same convention every other stored prompt in the product uses (EnrichmentPromptTemplate for columns, template segments for sequences): identity-keyed segments, so renaming what a reference points at never rewrites the prompt. Structurally parallel to the enrichment template rather than importing it: an agent prompt references INPUTS, an enrichment prompt references COLUMNS, and the import hierarchy keeps the two domains apart.

Every declared input after the pass: the ones already held, each keeping its id, plus any the prompt turned out to need.

A saved agent's prompt: literal text with references between the runs.

The same convention every other stored prompt in the product uses (EnrichmentPromptTemplate for columns, template segments for sequences): identity-keyed segments, so renaming what a reference points at never rewrites the prompt. Structurally parallel to the enrichment template rather than importing it: an agent prompt references INPUTS, an enrichment prompt references COLUMNS, and the import hierarchy keeps the two domains apart.