repl /unload command

Author: telmomenezes

CHANGELOG.md

@@ -11,7 +11,7 @@
 - readers provide source information.
 - `hyperbase.parsers.badness` module for parser-agnostic combined structural + token-matching validation.
 - built-in REPL setting `check_badness` to render a badness panel after each parse, available regardless of the active parser plugin.
-- more REPL commands: /load, /save, /search, /count, /count-csv, /types, /transform and /classify.
+- more REPL commands: /load, /unload, /save, /search, /count, /count-csv, /types, /transform and /classify.
 
 ### Changed
 

src/hyperbase/cli/repl.py

@@ -358,6 +358,10 @@ def __init__(self, parser_name: str | None, settings: dict[str, Any]) -> None:
                 "help": "Load hyperedges from a .jsonl parse-results file",
                 "handler": self.cmd_load,
             },
+            "unload": {
+                "help": "Unload the current dataset and forget it on restart",
+                "handler": self.cmd_unload,
+            },
             "save": {
                 "help": "Save in-memory edges to a .jsonl file",
                 "handler": self.cmd_save,
@@ -781,6 +785,21 @@ def cmd_load(self, args: list) -> bool:
             )
         return False
 
+    def cmd_unload(self, args: list) -> bool:
+        if not self.edges and self.edges_source is None:
+            self.console.print("[yellow]No dataset loaded.[/yellow]")
+            return False
+        prev = self.edges_source
+        self.edges = []
+        self.edges_source = None
+        self.settings.pop("edges_path", None)
+        save_settings(self.settings)
+        if prev is not None:
+            self.console.print(f"[green]✓[/green] Unloaded dataset [cyan]{prev}[/cyan]")
+        else:
+            self.console.print("[green]✓[/green] Unloaded dataset")
+        return False
+
     def cmd_save(self, args: list) -> bool:
         if len(args) < 1:
             self.console.print(