feat: resolve trivial todo!() sites with existing constructors

Replace todo!("VersionParser::new()") with VersionParser::new() at 6
call sites (array_loader, base_command, create_project_command,
vcs_repository, http_downloader x2) and EventDispatcher::io_clone with
self.io.clone(). All targets already exist on their types.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

6 files changed, 7 insertions, 16 deletions

diff --git a/crates/shirabe/src/command/base_command.rs b/crates/shirabe/src/command/base_command.rs
index 6b673ed..f806854 100644
--- a/crates/shirabe/src/command/base_command.rs
+++ b/crates/shirabe/src/command/base_command.rs
@@ -643,8 +643,7 @@ impl<C: HasBaseCommandData> BaseCommand for C {
         &self,
         requirements: Vec<String>,
     ) -> Result<Vec<IndexMap<String, String>>> {
-        // TODO(phase-b): VersionParser has no public `new` yet
-        let parser: VersionParser = todo!("VersionParser::new()");
+        let parser: VersionParser = VersionParser::new();
 
         parser.parse_name_version_pairs(requirements)
     }
diff --git a/crates/shirabe/src/command/create_project_command.rs b/crates/shirabe/src/command/create_project_command.rs
index 90a4d99..efbfd44 100644
--- a/crates/shirabe/src/command/create_project_command.rs
+++ b/crates/shirabe/src/command/create_project_command.rs
@@ -567,8 +567,7 @@ impl CreateProjectCommand {
         no_progress: bool,
         secure_http: bool,
     ) -> Result<bool> {
-        // TODO(phase-b): VersionParser has no public `new` yet
-        let parser: VersionParser = todo!("VersionParser::new()");
+        let parser: VersionParser = VersionParser::new();
         let requirements = parser.parse_name_version_pairs(vec![package_name.to_string()])?;
         let name = strtolower(
             requirements[0]
diff --git a/crates/shirabe/src/event_dispatcher/event_dispatcher.rs b/crates/shirabe/src/event_dispatcher/event_dispatcher.rs
index 175b689..77d016b 100644
--- a/crates/shirabe/src/event_dispatcher/event_dispatcher.rs
+++ b/crates/shirabe/src/event_dispatcher/event_dispatcher.rs
@@ -1307,8 +1307,7 @@ impl EventDispatcher {
     // ---- helpers ----
 
     fn io_clone(&self) -> std::rc::Rc<std::cell::RefCell<dyn IOInterface>> {
-        // TODO(phase-b): IOInterface is not Clone — placeholder until io ownership is resolved.
-        todo!("clone std::rc::Rc<std::cell::RefCell<dyn IOInterface>>")
+        self.io.clone()
     }
 
     fn composer(&self) -> PartialComposerHandle {
diff --git a/crates/shirabe/src/package/loader/array_loader.rs b/crates/shirabe/src/package/loader/array_loader.rs
index 634bef8..744b40a 100644
--- a/crates/shirabe/src/package/loader/array_loader.rs
+++ b/crates/shirabe/src/package/loader/array_loader.rs
@@ -36,10 +36,7 @@ impl ArrayLoader {
     pub fn new(parser: Option<VersionParser>, load_options: bool) -> Self {
         let parser = match parser {
             Some(p) => p,
-            None => {
-                // TODO(phase-b): VersionParser has no public `new` yet
-                todo!("VersionParser::new()")
-            }
+            None => VersionParser::new(),
         };
         Self {
             version_parser: parser,
diff --git a/crates/shirabe/src/repository/vcs_repository.rs b/crates/shirabe/src/repository/vcs_repository.rs
index 804ba51..7a570c6 100644
--- a/crates/shirabe/src/repository/vcs_repository.rs
+++ b/crates/shirabe/src/repository/vcs_repository.rs
@@ -296,8 +296,7 @@ impl VcsRepository {
             }
             .into());
         }
-        // TODO(phase-b): VersionParser has no public `new`
-        self.version_parser = Some(todo!("VersionParser::new()"));
+        self.version_parser = Some(VersionParser::new());
         if self.loader.is_none() {
             self.loader = Some(Box::new(ArrayLoader::new(
                 Some(todo!("phase-b: clone VersionParser")),
diff --git a/crates/shirabe/src/util/http_downloader.rs b/crates/shirabe/src/util/http_downloader.rs
index 89bf0a4..b33ed58 100644
--- a/crates/shirabe/src/util/http_downloader.rs
+++ b/crates/shirabe/src/util/http_downloader.rs
@@ -712,8 +712,7 @@ impl HttpDownloader {
             let versions_key = format!("{}-versions", r#type);
             if let Some(versions_value) = data.get(&versions_key) {
                 if !shirabe_php_shim::empty(versions_value) {
-                    // TODO(phase-b): VersionParser::new
-                    let version_parser: VersionParser = todo!("VersionParser::new()");
+                    let version_parser: VersionParser = VersionParser::new();
                     let constraint = version_parser
                         .parse_constraints(versions_value.as_string().unwrap_or(""))?;
                     let composer_constraint = SimpleConstraint::new(
@@ -745,8 +744,7 @@ impl HttpDownloader {
                 continue;
             }
 
-            // TODO(phase-b): VersionParser::new
-            let version_parser: VersionParser = todo!("VersionParser::new()");
+            let version_parser: VersionParser = VersionParser::new();
             if let Some(PhpMixed::List(list)) = entry {
                 for spec in list {
                     let r#type = substr(key, 0, Some(-1));