Feature request & BUG report: auto add filenames of all staged files

[marridG]

Hi~
Is it possible to include filenames of all staged files in the commit message?

What I've tried

1. read related issue: Feature request: preview of file list #8 (reply)
2. tried the following config

{
    "vscodeGitCommit.variables": {

        "prefix": "keke",
        "files.add": "files",
        "files.edit": "files.staged.modified",
        "files.del": "files.staged.deleted",
    },
    "vscodeGitCommit.template": [
        "{prefix}: {message}",
        "- [ADDED] {files.add}",
        "- [EDITED] {files.edit}",
        "- [RMVED] {files.del}"
    ],
}

with files:

• .env.prod: added and staged
• manual.service.ts, create-asset-profile-dialog.componenr.ts: modified and stage
• another one modified but NOT staged

Expected behaviour

1. with some new macros ("files.add": "<some.new.macro>"), after entering {message} and pressing ENTER, filenames concatnated with ", " are auto generated for variable files.add, files.edit, files.del
2. final output may be like:

<icon> feature: a sample output
- [ADDED] .env.prod
- [EDITED] manual.service.ts, create-asset-profile-dialog.componenr.ts
- [RMVED]

Why it fails

1. "files.edit": "files.staged.modified" does NOT show filenames on the "drop-down". The number of elements is INCORRECT(should be 2, manual.service.ts, create-asset-profile-dialog.componenr.ts, instead of 3).
   

2. BTW "files.add": "files" (deliberately not as "files.staged.added" to test) do show filenames. The number is correct (as 4).
   

3. when multiple files are edited (and staged), only ONE file can be selected in {files.staged.modified} to fill {files.edit}.

4. it is not possible to determine the number of added/edited/deleted files beforehand. neither is changing the template everytime

Thanks!