7 files changed, 75 insertions, 31 deletions
diff --git a/crates/mozart-core/src/package.rs b/crates/mozart-core/src/package.rs
index 0d5c482..c6a3ae9 100644
--- a/crates/mozart-core/src/package.rs
+++ b/crates/mozart-core/src/package.rs
@@ -6,6 +6,8 @@ use std::fs;
 use std::path::Path;
 
 pub mod archiver;
+pub mod dumper;
+pub mod version;
 
 /// Package stability level.
 /// Higher value = less stable.
diff --git a/crates/mozart-core/src/package/dumper.rs b/crates/mozart-core/src/package/dumper.rs
new file mode 100644
index 0000000..18af6b0
--- /dev/null
+++ b/crates/mozart-core/src/package/dumper.rs
@@ -0,0 +1,3 @@
+mod array_dumper;
+
+pub use array_dumper::*;
diff --git a/crates/mozart-core/src/package/dumper/array_dumper.rs b/crates/mozart-core/src/package/dumper/array_dumper.rs
new file mode 100644
index 0000000..cd53e7a
--- /dev/null
+++ b/crates/mozart-core/src/package/dumper/array_dumper.rs
@@ -0,0 +1,55 @@
+use crate::composer::{InstallationSource, LocalPackage};
+
+/// Mirrors `Composer\Package\Dumper\ArrayDumper`. Serialises a `LocalPackage`
+/// into the JSON shape that `VersionGuesser::guess_version` expects.
+#[derive(Default)]
+pub struct ArrayDumper;
+
+impl ArrayDumper {
+    pub fn new() -> Self {
+        Self
+    }
+
+    pub fn dump(&self, package: &LocalPackage) -> serde_json::Value {
+        build_package_config(package)
+    }
+}
+
+/// Serialises a `LocalPackage` to the JSON shape consumed by
+/// `VersionGuesser::guess_version`. Mirrors `ArrayDumper::dump($package)` —
+/// we include all fields that `VersionGuesser` inspects.
+fn build_package_config(package: &LocalPackage) -> serde_json::Value {
+    let mut obj = serde_json::Map::new();
+    obj.insert("name".into(), package.pretty_name().into());
+    obj.insert("version".into(), package.pretty_version().into());
+    if let Some(t) = package.package_type() {
+        obj.insert("type".into(), t.into());
+    }
+    obj.insert("extra".into(), package.extra().clone());
+    if let Some(src) = package.source() {
+        let mut s = serde_json::Map::new();
+        s.insert("type".into(), src.kind.clone().into());
+        s.insert("url".into(), src.url.clone().into());
+        if let Some(r) = &src.reference {
+            s.insert("reference".into(), r.clone().into());
+        }
+        obj.insert("source".into(), serde_json::Value::Object(s));
+    }
+    if let Some(dist) = package.dist() {
+        let mut d = serde_json::Map::new();
+        d.insert("type".into(), dist.kind.clone().into());
+        d.insert("url".into(), dist.url.clone().into());
+        if let Some(r) = &dist.reference {
+            d.insert("reference".into(), r.clone().into());
+        }
+        obj.insert("dist".into(), serde_json::Value::Object(d));
+    }
+    if let Some(is) = package.installation_source() {
+        let s = match is {
+            InstallationSource::Source => "source",
+            InstallationSource::Dist => "dist",
+        };
+        obj.insert("installation-source".into(), s.into());
+    }
+    serde_json::Value::Object(obj)
+}
diff --git a/crates/mozart-core/src/package/version.rs b/crates/mozart-core/src/package/version.rs
new file mode 100644
index 0000000..a4cbe52
--- /dev/null
+++ b/crates/mozart-core/src/package/version.rs
@@ -0,0 +1,5 @@
+mod version_guesser;
+mod version_parser;
+
+pub use version_guesser::*;
+pub use version_parser::*;
diff --git a/crates/mozart-core/src/vcs/version_guesser.rs b/crates/mozart-core/src/package/version/version_guesser.rs
index 58b758e..b8071e8 100644
--- a/crates/mozart-core/src/vcs/version_guesser.rs
+++ b/crates/mozart-core/src/package/version/version_guesser.rs
@@ -1,14 +1,5 @@
-//! `VersionGuesser` — derive a package's current version from the working
-//! copy, mirroring `Composer\Package\Version\VersionGuesser`.
-//!
-//! Differences from the PHP version:
-//! - Fossil is not supported (Mozart has no Fossil driver).
-//! - `Platform::isInputCompletionProcess()` short-circuit is omitted.
-//! - `guess_feature_version` runs candidate comparisons sequentially.
-//!   Composer parallelises via `executeAsync`; ours is simpler at the
-//!   cost of speed when many candidate branches exist.
-
-use super::process::ProcessExecutor;
+use crate::package::version::VersionParser;
+use crate::vcs::process::ProcessExecutor;
 use mozart_semver::{Version, normalize_branch};
 use regex::Regex;
 use serde_json::Value;
@@ -17,25 +8,6 @@ use std::sync::LazyLock;
 
 const DEFAULT_BRANCH_ALIAS: &str = "9999999-dev";
 
-/// Mirrors `Composer\Package\Version\VersionParser` (itself a thin wrapper
-/// around `Composer\Semver\VersionParser`). In Rust, semver parsing is
-/// handled by `mozart_semver` directly, so this type carries no state;
-/// it exists to keep `VersionGuesser::new` signature compatible with the
-/// PHP constructor.
-pub struct VersionParser;
-
-impl Default for VersionParser {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-impl VersionParser {
-    pub fn new() -> Self {
-        Self
-    }
-}
-
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct GuessedVersion {
     pub version: String,
diff --git a/crates/mozart-core/src/package/version/version_parser.rs b/crates/mozart-core/src/package/version/version_parser.rs
new file mode 100644
index 0000000..d2f5ccf
--- /dev/null
+++ b/crates/mozart-core/src/package/version/version_parser.rs
@@ -0,0 +1,8 @@
+#[derive(Default)]
+pub struct VersionParser;
+
+impl VersionParser {
+    pub fn new() -> Self {
+        Self
+    }
+}
diff --git a/crates/mozart-core/src/vcs.rs b/crates/mozart-core/src/vcs.rs
index e7ca383..11db58d 100644
--- a/crates/mozart-core/src/vcs.rs
+++ b/crates/mozart-core/src/vcs.rs
@@ -3,4 +3,3 @@ pub mod driver;
 pub mod process;
 pub mod repository;
 pub mod util;
-pub mod version_guesser;