clice/openspec/changes/split-folding-range-pipeline/tasks.md

1. Existing Raw Model and Collector Boundary

• 1.1 Treat the existing RawFoldingRange as the finished internal collection model for this change.
• 1.2 Keep the existing AST structural folding path routed through raw ranges instead of reintroducing direct collector-to-LSP emission.
• 1.3 Add regression fixtures or assertions that cover the currently supported structural fold categories before further rendering changes.

2. Normalization, Opts, and Rendering

• 2.1 Implement normalization for deterministic sorting, duplicate removal, and invalid-range filtering.
• 2.2 Introduce FoldingRangeOptions/Opts with line_folding_only = false as the default.
• 2.3 Introduce a dedicated renderer that converts normalized ranges plus Opts into final LSP folding-range objects.
• 2.4 Honor line_folding_only in rendering by shaping emitted boundaries for clients that only support whole-line folds.
• 2.5 Keep default rendered output compatible with current structural behavior while exposing extension points for future collectors and render rules.

3. Verification

• 3.1 Compare pre-refactor and post-refactor outputs for the existing structural folding test cases.
• 3.2 Add focused tests for line_folding_only output using the new folding options path.
• 3.3 Run relevant folding-range unit tests and fix any ordering, deduplication, or boundary regressions introduced by the new pipeline.