# Compose UTF-8 byte-column records

Build-time release reference. Runtime readiness, deployment, payment settlement and external indexing are not evaluated here. Prices are proposed; this file cannot authorize execution or payment.

Write a real fixed-width UTF-8 import artifact from caller-declared byte columns and string records, with explicit ASCII padding, strict overflow rejection and byte offset manifest.

Release: 0.29.0. Built: 2026-10-06T15:38:00Z.

## Choose for
- Explicit UTF-8 byte column layout, ASCII pad characters and exact-key string records

## Outside this profile
- Terminal display width, glyph alignment, packed decimals, spreadsheet formatting or named bank/government formats
- Truncation, numeric coercion, parsing fixed-width input or CSV comparison
- Blind transcoding after layout; changing encoding can invalidate UTF-8 byte widths
- Fetching, uploading, sending, writing files, accessing media or changing external state

Proposed nominal USD 0.005 per successful call; payer fees excluded. No verified runtime availability.

- [Exact release contract](/reference/services/fixed-width-records-compose.json)
- [Input schema](/reference/schemas/fixed-width-records-compose.input.json)
- [Output schema](/reference/schemas/fixed-width-records-compose.output.json)
- [Fixed example](/reference/examples/fixed-width-records-compose.json)
- [Complete HTML reference](/discover/tools/fixed-width-records-compose)