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-# Overall Plan for Implementing Variable Symbol Handling in gt
-
-## Goal
-Modify the gt interpreter so that:
-1. Users can push a variable *symbol* onto the stack using `:x` syntax.
-2. Bare identifier `x` pushes the symbol when the variable is unbound, otherwise pushes its value.
-3. Existing assignment operators `:=` and `=:` remain unchanged (they will receive either a symbol from `:x` or from an undefined identifier).
-
-## Changes Required
-
-### 1. Lexer
-- Recognize a leading colon (`:`) followed by an identifier as a `TOKEN_SYMBOL`.
-- When seen, push a `CELL_SYMBOL` cell holding the identifier string onto the stack.
-
-### 2. Evaluator (identifier handling)
-- For a bare identifier token:
-  - Attempt `env_get(name)`.
-  - If a binding exists → push the value cell.
-  - If no binding exists → push a `CELL_SYMBOL` cell (treat as symbol).
-
-### 3. Assignment Operators
-- Keep `:=` and `=:`) handlers unchanged.
-- They now receive either a symbol cell (from `:x` or from undefined identifier) and a value cell in the expected order.
-
-### 4. REPL / Debugging
-- When printing the stack, prefix symbol cells with `:` (e.g., `:x`) to distinguish from values.
-
-### 5. Testing
-- Verify the behavior with a test suite covering:
-  - `:x` pushes symbol.
-  - `x` unbound → pushes symbol.
-  - `x` bound → pushes value.
-  - `:x 10 :=` binds x to 10.
-  - `10 :x =:` binds x to 10 (value‑first).
-  - Error cases where needed.
-
-## Tasks (managed via `ask`)
-Each task below will be added via `ask add` and tagged with `plan:PLAN.md` for traceability.
-