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add netrw preview scrolling

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Ray Elliott 2026-10-28 18:50:11 +00:00
commit c48c9451fc
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@ -218,6 +218,7 @@ Record every decision here with a short rationale. Append new entries; do not re
- 2026-10-28: Fixed a reproducible Neovim 0.12 Tree-sitter race during rapid cross-language netrw previews. Native `:pedit` unloads the previous preview buffer while its asynchronous parser may still be running, producing `TSNode:range()` errors. Preview-only file buffers are now kept loaded but unlisted for the rest of the Neovim session, with Tree-sitter highlighting suspended in favor of Vim syntax; avoiding parser detachment is necessary because delayed unloading reproduces the same race. Pre-existing buffer state is preserved, while entering a previewed file for real editing restores listed-buffer behavior and Tree-sitter immediately. An 80-step Markdown/Lua/JSON preview stress test, edit restoration check, retained-buffer check, and pre-existing-buffer check all pass.
- 2026-10-28: Disabled diagnostic rendering in netrw file preview buffers. The preview metadata records each buffer's prior diagnostic state and restores it when the file is opened for editing, keeping ephemeral previews quiet without overriding buffers where diagnostics were already disabled.
- 2026-10-28: Made netrw file previews intentionally plain after CSS and HTML exposed residual colour. The remaining decoration was Vim regex syntax plus indent-blankline extmarks, not diagnostics or Tree-sitter. Preview buffers now clear `syntax` and disable their buffer-local indent guides, then restore both recorded states on real edit.
- 2026-10-28: Added buffer-local netrw `<M-j>` / `<M-k>` mappings to scroll the current preview with native `<C-e>` / `<C-y>` behavior while focus remains in the tree. The mappings accept Vim counts and quietly do nothing when no preview exists.
## Project-Local Configuration