Fixed-width layout (read-only)
Outcome
An operator can read a FIXED_WIDTH feed's saved layout
(ingestion.source_feed.parser_config), and knows where a change to it is
built.
What changed (#6745)
The parser-config builder in the RCM app (Visual / YAML / Preview panes and Save parser config) is retired. A feed's saved layout is untouched and keeps parsing every file.
Read a feed's layout
Configuration → Feeds, open the FIXED_WIDTH feed, choose the Parser
Config tab. Fixed-width layout shows the saved layout as YAML,
read-only (its fileControls are left out — they have their own editor below
it). "No fixed-width layout is saved for this feed." means none is.
File layout & controls on the same tab is still editable, and saving it sends the saved layout back unchanged.
Change a layout
Build it in the Import Desk (/import-desk, staff with an Import Desk
role); the read-only tab links there for a role holder.