Merge v3-t50: subagents use the models service, every test module in the bundle script (T50)

# Conflicts:
#	host/js/package.json
#	host/js/subagents-test-bundle.js

host/tests/subagents.rs

@@ -40,22 +40,31 @@ fn prepare(dir: &Path) -> anyhow::Result<()> {
         target.join("wasm32-wasip2/release/git.wasm"),
         disk.join("bin/git.wasm"),
     )?;
-    for directory in ["extensions/subagents", "extensions/core", "agents"] {
+    for directory in [
+        "extensions/subagents",
+        "extensions/models",
+        "extensions/core",
+        "agents",
+    ] {
         std::fs::create_dir_all(repo.join(directory))?;
     }
-    for entry in std::fs::read_dir(source.join("extensions/subagents"))? {
-        let entry = entry?;
-        if entry.path().extension().is_some_and(|ext| ext == "ts") {
-            std::fs::copy(
-                entry.path(),
-                repo.join("extensions/subagents").join(entry.file_name()),
-            )?;
+    for extension in ["subagents", "models"] {
+        for entry in std::fs::read_dir(source.join("extensions").join(extension))? {
+            let entry = entry?;
+            if entry.path().extension().is_some_and(|ext| ext == "ts") {
+                std::fs::copy(
+                    entry.path(),
+                    repo.join("extensions")
+                        .join(extension)
+                        .join(entry.file_name()),
+                )?;
+            }
         }
     }
     std::fs::create_dir_all(repo.join("extensions/probe"))?;
     std::fs::write(
         repo.join("extensions/probe/server.ts"),
-        "export default host => { globalThis.subagentService = host.need({name:'subagents'}); return {name:'probe'}; }",
+        "export default host => { globalThis.subagentService = host.need({name:'subagents'}); host.implement({name:'models.pin'}, {pin:async()=>globalThis.childPin}); return {name:'probe'}; }",
     )?;
     std::fs::copy(
         source.join("extensions/core/agents.ts"),