Module inline_variable 

Inline-variable recipe: replace all uses of a variable with its initializer and remove the binding.

Algorithm:

1. Parse the file with tree-sitter.
2. Locate the variable declaration node at the given position (line:col of the variable name).
3. Extract: variable name, initializer expression text, declaration node byte range, and the scope node (the function/block that contains the declaration).
4. Within that scope: walk all identifier nodes, collect those whose text matches the variable name (conservative: skip if ambiguous).
5. Check for reassignments — error out if any exist.
6. Replace each reference with the initializer expression text (wrapping in parens if needed).
7. Remove the declaration statement line.

Language-specific declaration node kinds:

• Rust: let_declaration — pattern child is identifier or _pattern, value child via =
• JS/TS: lexical_declaration (const/let) / variable_declaration (var) — contains variable_declarator which has name: identifier and value: <expr>
• Python: assignment — left child is identifier, right is the value

Structs

InlineVariableOutcome

Outcome of a successful inline-variable plan.

Functions

line_col_to_byte

Convert a 1-based line:col pair to a byte offset in content.

plan_inline_variable

Build an inline-variable plan without touching the filesystem.