Right now, for mapping files that concern mapping lines to other lines, as will be common with Templating engines, each file name needs to be re-recorded in each file, such as in:

# Path prefixes
remote_prefix: /home/derick/dev/xdebug.cloud/src/cache/compiled_templates/xhtml-updqr0
local_prefix: /home/derick/dev/xdebug.cloud/src/templates

# The mapping table
user-info-823edfe12e38a649355c5172b9d98e0a.php:2-31 = user-info.ezt:1
user-info-823edfe12e38a649355c5172b9d98e0a.php:32-33 = user-info.ezt:2
user-info-823edfe12e38a649355c5172b9d98e0a.php:34-36 = user-info.ezt:3
user-info-823edfe12e38a649355c5172b9d98e0a.php:37 = user-info.ezt:4
user-info-823edfe12e38a649355c5172b9d98e0a.php:38 = user-info.ezt:5
user-info-823edfe12e38a649355c5172b9d98e0a.php:39-40 = user-info.ezt:6
user-info-823edfe12e38a649355c5172b9d98e0a.php:41-46 = user-info.ezt:7
…
user-info-823edfe12e38a649355c5172b9d98e0a.php:301-302 = user-info.ezt:73
user-info-823edfe12e38a649355c5172b9d98e0a.php:303 = user-info.ezt:74-75

Instead, it would be much better if you could also do something akin to:

remote_prefix: /home/derick/dev/xdebug.cloud/src/cache/compiled_templates/xhtml-updqr0
local_prefix: /home/derick/dev/xdebug.cloud/src/templates

user-info-823edfe12e38a649355c5172b9d98e0a.php = user-info.ezt (@2-31=1;32-33=2;34-36=3,37=4;38=5;39-40=6;41-46=7…)

Or a different syntax...

This ticket came forth out of https://github.com/twigphp/Twig/pull/4733#discussion_r2689930741 and the "Future Scope" from the original design document: https://xdebug.org/funding/001-native-path-mapping#future-scope