diff --git a/libs/git/hook/sync/mod.rs b/libs/git/hook/sync/mod.rs
index 5df0996..a97464d 100644
--- a/libs/git/hook/sync/mod.rs
+++ b/libs/git/hook/sync/mod.rs
@@ -8,11 +8,11 @@ pub mod tag;
 
 use db::cache::AppCache;
 use db::database::AppDatabase;
-use models::projects::project_skill::{Column as SkillCol, Entity as SkillEntity};
 use models::projects::project_skill::ActiveModel as SkillActiveModel;
+use models::projects::project_skill::{Column as SkillCol, Entity as SkillEntity};
 use models::repos::repo::Model as RepoModel;
-use models::RepoId;
 use models::ActiveModelTrait;
+use models::RepoId;
 use sea_orm::{ColumnTrait, EntityTrait, QueryFilter, Set};
 use std::collections::HashMap;
 use std::path::Path;
@@ -43,8 +43,14 @@ fn scan_skills_from_dir(
             let path = entry.path();
             if path.is_dir() {
                 stack.push(path);
-            } else if path.file_name().and_then(|n| n.to_str()) == Some("SKILL.md") {
-                if let Some(dir_name) = path.parent()
+            } else if path
+                .file_name()
+                .and_then(|n| n.to_str())
+                .map(|x| x.to_lowercase())
+                == Some("skill.md".to_string())
+            {
+                if let Some(dir_name) = path
+                    .parent()
                     .and_then(|p| p.file_name())
                     .and_then(|n| n.to_str())
                     .filter(|s| !s.starts_with('.'))
@@ -135,11 +141,7 @@ pub struct HookMetaDataSync {
 }
 
 impl HookMetaDataSync {
-    pub fn new(
-        db: AppDatabase,
-        cache: AppCache,
-        repo: RepoModel,
-    ) -> Result<Self, crate::GitError> {
+    pub fn new(db: AppDatabase, cache: AppCache, repo: RepoModel) -> Result<Self, crate::GitError> {
         let domain = GitDomain::from_model(repo.clone())?;
         Ok(Self {
             db,
@@ -185,18 +187,16 @@ impl HookMetaDataSync {
 
     /// Full sync pipeline (no locking — caller is responsible).
     async fn sync_work(&self) -> Result<(), crate::GitError> {
-        let mut txn = self
-            .db
-            .begin()
-            .await
-            .map_err(|e| crate::GitError::IoError(format!("failed to begin transaction: {}", e)))?;
+        let mut txn =
+            self.db.begin().await.map_err(|e| {
+                crate::GitError::IoError(format!("failed to begin transaction: {}", e))
+            })?;
 
         self.sync_refs(&mut txn).await?;
         self.sync_commits(&mut txn).await?;
         self.sync_tags(&mut txn).await?;
         self.sync_lfs_objects(&mut txn).await?;
-        self.run_fsck_and_rollback_if_corrupt(&mut txn)
-            .await?;
+        self.run_fsck_and_rollback_if_corrupt(&mut txn).await?;
 
         txn.commit().await.map_err(|e| {
             crate::GitError::IoError(format!("failed to commit transaction: {}", e))
@@ -210,14 +210,12 @@ impl HookMetaDataSync {
 
     /// Fsck only work (no locking — caller is responsible).
     async fn fsck_work(&self) -> Result<(), crate::GitError> {
-        let mut txn = self
-            .db
-            .begin()
-            .await
-            .map_err(|e| crate::GitError::IoError(format!("failed to begin transaction: {}", e)))?;
+        let mut txn =
+            self.db.begin().await.map_err(|e| {
+                crate::GitError::IoError(format!("failed to begin transaction: {}", e))
+            })?;
 
-        self.run_fsck_and_rollback_if_corrupt(&mut txn)
-            .await?;
+        self.run_fsck_and_rollback_if_corrupt(&mut txn).await?;
 
         txn.commit().await.map_err(|e| {
             crate::GitError::IoError(format!("failed to commit transaction: {}", e))
@@ -332,22 +330,40 @@ impl HookMetaDataSync {
             }
         };
 
-        let existing_by_slug: HashMap<_, _> = existing
+        // Deduplicate by {repo_id}+{blob_hash}, keep latest by commit_sha
+        let mut deduped: std::collections::HashMap<String, DiscoveredSkill> = std::collections::HashMap::new();
+        for skill in discovered {
+            let key = format!("{}:{}", self.repo.id, skill.blob_hash.as_ref().unwrap_or(&skill.slug));
+            match deduped.get(&key) {
+                Some(existing) => {
+                    if skill.commit_sha.as_ref().unwrap_or(&String::new()) > existing.commit_sha.as_ref().unwrap_or(&String::new()) {
+                        deduped.insert(key, skill);
+                    }
+                }
+                None => {
+                    deduped.insert(key, skill);
+                }
+            }
+        }
+
+        let existing_by_hash: HashMap<_, _> = existing
             .into_iter()
-            .map(|s| (s.slug.clone(), s))
+            .map(|s| {
+                let key = format!("{}:{}", s.repo_id.unwrap_or_default(), s.blob_hash.clone().unwrap_or_default());
+                (key, s)
+            })
             .collect();
 
-        let mut seen_slugs = std::collections::HashSet::new();
+        let mut seen_keys = std::collections::HashSet::new();
 
-        for skill in discovered {
-            seen_slugs.insert(skill.slug.clone());
+        for (key, skill) in deduped {
+            seen_keys.insert(key.clone());
             let json_meta = serde_json::to_value(&skill.metadata).unwrap_or_default();
 
-            if let Some(existing_skill) = existing_by_slug.get(&skill.slug) {
+            if let Some(existing_skill) = existing_by_hash.get(&key) {
                 if existing_skill.content != skill.content
                     || existing_skill.metadata != json_meta
-                    || existing_skill.commit_sha.as_ref() != skill.commit_sha.as_ref()
-                    || existing_skill.blob_hash.as_ref() != skill.blob_hash.as_ref()
+                    || existing_skill.commit_sha != skill.commit_sha
                 {
                     let mut active: SkillActiveModel = existing_skill.clone().into();
                     active.content = Set(skill.content);
@@ -383,16 +399,25 @@ impl HookMetaDataSync {
             }
         }
 
-        for (slug, old_skill) in existing_by_slug {
-            if !seen_slugs.contains(&slug) {
-                if SkillEntity::delete_by_id(old_skill.id).exec(&self.db).await.is_ok() {
+        for (key, old_skill) in existing_by_hash {
+            if !seen_keys.contains(&key) {
+                if SkillEntity::delete_by_id(old_skill.id)
+                    .exec(&self.db)
+                    .await
+                    .is_ok()
+                {
                     removed += 1;
                 }
             }
         }
 
         if created > 0 || updated > 0 || removed > 0 {
-            tracing::info!("skills synced created={} updated={} removed={}", created, updated, removed);
+            tracing::info!(
+                "skills synced created={} updated={} removed={}",
+                created,
+                updated,
+                removed
+            );
         }
     }
 }