1 files changed, 81 insertions, 0 deletions
diff --git a/cli/commands/check.js b/cli/commands/check.js
new file mode 100644
index 0000000..f91b710
--- /dev/null
+++ b/cli/commands/check.js
@@ -0,0 +1,81 @@
+const { LoadConfig } = require("../../lib/config")
+const { GetModVersions, GetCompatibleVersion } = require("../../lib/modrinth")
+
+const config = LoadConfig()
+const { minecraft_version, modrinth_mods } = config
+
+const Check = async () =>
+{
+    console.log(`\n  Checking mod compatibility for MC ${minecraft_version} (Fabric)...\n`)
+
+    const compatible = []
+    const incompatible = []
+    const failed = []
+
+    for (const slug of modrinth_mods)
+    {
+        try
+        {
+            const versions = await GetModVersions(slug)
+            if (!versions)
+            {
+                failed.push(slug)
+                continue
+            }
+
+            const match = GetCompatibleVersion(versions, minecraft_version, "fabric")
+            if (match)
+            {
+                const filename = match.files[0]?.filename || match.version_number
+                compatible.push({ slug, version: filename })
+            }
+            else
+            {
+                incompatible.push(slug)
+            }
+        }
+        catch (err)
+        {
+            failed.push(slug)
+        }
+    }
+
+    // Display results
+    if (compatible.length)
+    {
+        console.log("  [OK] Compatible:")
+        for (const { slug, version } of compatible)
+            console.log(`       ${slug} -> ${version}`)
+        console.log("")
+    }
+
+    if (incompatible.length)
+    {
+        console.log("  [FAIL] No compatible version:")
+        for (const slug of incompatible)
+            console.log(`         ${slug}`)
+        console.log("")
+    }
+
+    if (failed.length)
+    {
+        console.log("  [WARN] Failed to check:")
+        for (const slug of failed)
+            console.log(`         ${slug}`)
+        console.log("")
+    }
+
+    // Summary
+    const total = modrinth_mods.length
+    const ok = compatible.length
+
+    console.log(`  Summary: ${ok}/${total} mods compatible\n`)
+
+    if (incompatible.length === 0 && failed.length === 0)
+        console.log("  [OK] Safe to generate!\n")
+    else
+        console.log("  [FAIL] Not all mods are compatible. Generate may have issues.\n")
+}
+
+module.exports = { Check }
+