Completion textEdit range incorrect for paths with additionalProperties

[fecet]

Description

When completing TOML table headers that involve additionalProperties in the JSON schema, Taplo returns incorrect textEdit.range values. The range covers the entire table header path, but the replacement text is only the leaf property name.

Steps to Reproduce

1. Use a schema like pixi's manifest schema where feature uses additionalProperties:

   "feature": {
     "type": "object",
     "additionalProperties": {
       "$ref": "#/$defs/Feature"
     }
   }

   And Feature has properties like pypi-dependencies.

2. In a TOML file, type [feature.ci. and trigger completion

3. Select pypi-dependencies from completion

4. Expected: [feature.ci.pypi-dependencies]
   Actual: [pypi-dependencies] (the feature.ci. prefix is replaced/deleted)

Root Cause Analysis

Taplo returns a textEdit like:

{
  "range": { "start": { "character": 1 }, "end": { "character": 12 } },
  "newText": "pypi-dependencies"
}

The range covers feature.ci. (cols 1-12), but newText is only pypi-dependencies. This causes editors to replace the entire path with just the leaf name.

Schema Path Comparison

Path	Schema Definition	Completion
activation.scripts	Direct $ref	✅ Works
feature.ci.pypi-dependencies	additionalProperties → $ref	❌ Broken

The issue appears specific to paths that traverse through additionalProperties (dynamic keys).

Environment

• Taplo: latest (via Mason/npm)
• Editor: Neovim with blink.cmp
• Schema: pixi manifest schema

Related

• blink.cmp#2343 - Initially reported there, confirmed to be upstream Taplo issue