Phase 5: add rename and find usages

README.md

@@ -11,13 +11,20 @@ never from online material (see `AGENTS.md`).
   (`#import`, `#run`, …), notes (`@Cleanup`), numbers (hex / binary / hexfloat /
   `_` separators), strings, here-strings (`#string DONE … DONE`), nesting block
   comments, operators, `---`, `$`/`$$`, `it` / `it_index`
+- Grammar-Kit parser and PSI for the full local 714-file corpus
+- Structure view and folding for blocks, comments, and here-strings
 - Colour settings page (**Settings → Editor → Color Scheme → Jai**)
 - Comment / uncomment (`//` and nesting `/* */`)
 - Brace matching, including the Jai-only `.{` struct-literal and `.[`
   array-literal openers
+- Basic completion for keywords, directives, and local Jai module/file paths
+- Go-to-definition for procedures and types in the same file and through
+  `#import`/`#load`
+- Rename and find-usages for declaration names and their resolved references
 
-Not yet: parser and PSI, so no structure view, go-to-definition, completion,
-formatting, or inspections. See `docs/BUILD_PLAN.md` for the phase plan.
+Remaining code-insight gaps include module-qualified members, parameters, and
+struct fields. Formatting, inspections, and compiler integration are planned
+later. See `docs/BUILD_PLAN.md` for the phase plan.
 
 ## Install it locally