From f759f149377942c4e04802c45162cda1c9bfb2b3 Mon Sep 17 00:00:00 2001
From: t <t@tjp.lol>
Date: Sat, 4 Jul 2026 09:50:12 -0600
Subject: big cli/tui gaps project

---
 src/command.zig | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

(limited to 'src/command.zig')

diff --git a/src/command.zig b/src/command.zig
index 2e63cea..43997ed 100644
--- a/src/command.zig
+++ b/src/command.zig
@@ -53,6 +53,19 @@ pub const Context = struct {
     /// handler. `null` when no extensions loaded; Lua commands are only
     /// registered when it is non-null, so handlers may assume it is set.
     lua_rt: ?*anyopaque = null,
+
+    /// The registry dispatching this command (for `/help` listings).
+    /// Stamped by `Registry.dispatch`; no wiring needed.
+    registry: ?*const Registry = null,
+
+    /// The session store the active session came from (for `/new`).
+    session_store: panto.SessionStore,
+
+    /// The live TUI `*tui_app.App`, when running under the TUI (same
+    /// `anyopaque` idiom as `lua_rt`: keeps this module free of TUI
+    /// concerns). Commands that steer the TUI (`/model`, `/new`, ...)
+    /// cast it back in `builtin_commands.zig`. Null in print mode.
+    tui: ?*anyopaque = null,
 };
 
 /// A single slash command.
@@ -120,6 +133,21 @@ pub const Registry = struct {
         });
     }
 
+    /// Remove every Lua-backed command, keeping native commands in place.
+    /// Called when the session's Lua runtime is torn down (`/new`,
+    /// `/resume`): the handler refs die with that runtime, and the next
+    /// session's harvest re-registers its own set — so `/help` always
+    /// lists exactly one copy.
+    pub fn clearLua(self: *Registry) void {
+        var i: usize = self.commands.items.len;
+        while (i > 0) {
+            i -= 1;
+            if (self.commands.items[i].lua_ref != null) {
+                _ = self.commands.orderedRemove(i);
+            }
+        }
+    }
+
     /// Find a command by name (without leading `/`). Null if absent.
     pub fn find(self: *const Registry, name: []const u8) ?*const Command {
         for (self.commands.items) |*cmd| {
@@ -150,6 +178,7 @@ pub const Registry = struct {
         const args = std.mem.trim(u8, body[name_end..], " \t");
 
         const cmd = self.find(name) orelse return Error.CommandNotFound;
+        ctx.registry = self;
         if (cmd.lua_ref) |ref| {
             try runLuaCommand(ref, args, ctx);
             return;
@@ -231,6 +260,22 @@ test "registerLua records name, description, and ref; collides with builtins" {
     try testing.expectError(error.DuplicateCommand, reg.registerLua("compact", "x", 1));
 }
 
+test "clearLua removes Lua-backed commands, keeps natives, allows re-harvest" {
+    var reg = Registry.init(testing.allocator);
+    defer reg.deinit();
+
+    try reg.register(.{ .name = "compact", .description = "d", .run = testHandler });
+    try reg.registerLua("hello", "d", 1);
+    try reg.registerLua("world", "d", 2);
+
+    reg.clearLua();
+    try testing.expectEqual(@as(usize, 1), reg.list().len);
+    try testing.expect(reg.find("compact") != null);
+    // A rebuilt session's harvest re-registers without DuplicateCommand.
+    try reg.registerLua("hello", "d", 3);
+    try testing.expectEqual(@as(?c_int, 3), reg.find("hello").?.lua_ref);
+}
+
 test "dispatch splits name and args" {
     var reg = Registry.init(testing.allocator);
     defer reg.deinit();
-- 
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