[unional]

Refs #164 (item 4)

What

plugin build, plugin version and publish sync-version used to write every JSON file with JSON.stringify(value, null, indent). That expanded every array and always added a trailing newline, so a repository formatted by biome or prettier failed biome ci after each build or sync. They now write through one serializer, formatJson in src/json.ts, which:

• keeps the existing file's indentation, line ending (LF/CRLF), and trailing newline, or lack of one
• copies the original text of every value left unchanged, so an array the formatter collapsed onto one line stays there; only a changed value is laid out fresh
• for a new file, or one with no indentation to read (single line), takes the indentation .editorconfig sets for that path (new src/editorconfig/), then the previous default: the canonical manifest's indentation for derived files, a tab for authored files
• reuses no text from a file that isn't strict JSON (comments, trailing commas)

The writers covered: vendor manifests, derived hooks and mcp files, the Copilot namespace hooks file, refreshed catalogs, the plugin.json/package.json writes shared by plugin version and sync-version, and plugin init's plugin.json and package.json writes (including the changesets version script wiring from #168).

Spec

• plugin/build: a new "Writes keep the repository's JSON format" use case and an "Output format" section in build.feature
• plugin/init: one sentence in the npm use case
• plugin/version: a rationale paragraph and two scenarios, with matching edge-table rows and CLI tests

Notes

This repo's biome.json excludes the derived *-plugin/plugin.json files because the old writer and the formatter kept flipping their array wrapping. That exclusion can probably go once this lands. I left it alone to keep this PR to item 4.

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[changeset-bot]

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Latest commit: 32d8ec6

The changes in this PR will be included in the next version bump.

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Name	Type
universal-plugin	Patch

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