Add addUserText helper; update all call sites

Conversation.addUserMessage now takes a []ContentBlock (symmetric with
addAssistantMessage). Introduce a thin addUserText wrapper in agent.zig
for the plain-text case and update every call site in agent.zig and
anthropic_messages_json.zig accordingly.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/main.zig b/src/main.zig
index 34a687a..06fd29e 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -355,6 +355,13 @@ pub fn main(init: std.process.Init) !void {
         );
     }
 
+    // Bootstrap staged `panto.so` onto the embedded VM's cpath and
+    // configured `package.path`/`cpath`; now wire `require('panto')` to
+    // the native module + the CLI's `ext` subtable. Must run before
+    // `installScheduler` (which writes onto the module table) and before
+    // any extension loads (which `require('panto')`).
+    try rt.installPantoModule();
+
     // luv is installed (or already present) at this point; wire the
     // libuv-driven coroutine scheduler before any extensions get a
     // chance to register tools that might want to yield.