diff --git a/codex-rs/analytics/src/analytics_client_tests.rs b/codex-rs/analytics/src/analytics_client_tests.rs
index 73ea42d760..7fe02a7cc1 100644
--- a/codex-rs/analytics/src/analytics_client_tests.rs
+++ b/codex-rs/analytics/src/analytics_client_tests.rs
@@ -709,6 +709,7 @@ async fn reducer_ingests_skill_invoked_fact() {
                     skill_name: "doc".to_string(),
                     skill_scope: codex_protocol::protocol::SkillScope::User,
                     skill_path,
+                    plugin_id: Some("docs@openai".to_string()),
                     invocation_type: InvocationType::Explicit,
                 }],
             })),
@@ -725,6 +726,7 @@ async fn reducer_ingests_skill_invoked_fact() {
             "skill_name": "doc",
             "event_params": {
                 "product_client_id": originator().value,
+                "plugin_id": "docs@openai",
                 "skill_scope": "user",
                 "repo_url": null,
                 "thread_id": "thread-1",
diff --git a/codex-rs/analytics/src/events.rs b/codex-rs/analytics/src/events.rs
index 885e93bbb9..35882c1aeb 100644
--- a/codex-rs/analytics/src/events.rs
+++ b/codex-rs/analytics/src/events.rs
@@ -55,6 +55,7 @@ pub(crate) struct SkillInvocationEventRequest {
 #[derive(Serialize)]
 pub(crate) struct SkillInvocationEventParams {
     pub(crate) product_client_id: Option<String>,
+    pub(crate) plugin_id: Option<String>,
     pub(crate) skill_scope: Option<String>,
     pub(crate) repo_url: Option<String>,
     pub(crate) thread_id: Option<String>,
diff --git a/codex-rs/analytics/src/facts.rs b/codex-rs/analytics/src/facts.rs
index e19d15d847..acadfdde73 100644
--- a/codex-rs/analytics/src/facts.rs
+++ b/codex-rs/analytics/src/facts.rs
@@ -35,6 +35,7 @@ pub struct SkillInvocation {
     pub skill_name: String,
     pub skill_scope: SkillScope,
     pub skill_path: PathBuf,
+    pub plugin_id: Option<String>,
     pub invocation_type: InvocationType,
 }
 
diff --git a/codex-rs/analytics/src/reducer.rs b/codex-rs/analytics/src/reducer.rs
index 63b9c3d5be..fe6fc5e267 100644
--- a/codex-rs/analytics/src/reducer.rs
+++ b/codex-rs/analytics/src/reducer.rs
@@ -175,6 +175,7 @@ impl AnalyticsReducer {
                         invoke_type: Some(invocation.invocation_type),
                         model_slug: Some(tracking.model_slug.clone()),
                         product_client_id: Some(originator().value),
+                        plugin_id: invocation.plugin_id,
                         repo_url,
                         skill_scope: Some(skill_scope.to_string()),
                     },
diff --git a/codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json b/codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json
index a589903032..a9b11f6e47 100644
--- a/codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json
+++ b/codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json
@@ -11744,6 +11744,12 @@
           "path": {
             "type": "string"
           },
+          "pluginId": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
           "scope": {
             "$ref": "#/definitions/v2/SkillScope"
           },
diff --git a/codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json b/codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json
index f041f8aae8..f69a0b16f3 100644
--- a/codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json
+++ b/codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json
@@ -9599,6 +9599,12 @@
         "path": {
           "type": "string"
         },
+        "pluginId": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
         "scope": {
           "$ref": "#/definitions/SkillScope"
         },
diff --git a/codex-rs/app-server-protocol/schema/json/v2/SkillsListResponse.json b/codex-rs/app-server-protocol/schema/json/v2/SkillsListResponse.json
index b4ec51ba78..b12d014d95 100644
--- a/codex-rs/app-server-protocol/schema/json/v2/SkillsListResponse.json
+++ b/codex-rs/app-server-protocol/schema/json/v2/SkillsListResponse.json
@@ -105,6 +105,12 @@
         "path": {
           "type": "string"
         },
+        "pluginId": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
         "scope": {
           "$ref": "#/definitions/SkillScope"
         },
diff --git a/codex-rs/app-server-protocol/schema/typescript/v2/SkillMetadata.ts b/codex-rs/app-server-protocol/schema/typescript/v2/SkillMetadata.ts
index 52c0cd4945..6c413be791 100644
--- a/codex-rs/app-server-protocol/schema/typescript/v2/SkillMetadata.ts
+++ b/codex-rs/app-server-protocol/schema/typescript/v2/SkillMetadata.ts
@@ -9,4 +9,4 @@ export type SkillMetadata = { name: string, description: string,
 /**
  * Legacy short_description from SKILL.md. Prefer SKILL.json interface.short_description.
  */
-shortDescription?: string, interface?: SkillInterface, dependencies?: SkillDependencies, path: string, scope: SkillScope, enabled: boolean, };
+shortDescription?: string, interface?: SkillInterface, dependencies?: SkillDependencies, pluginId?: string, path: string, scope: SkillScope, enabled: boolean, };
diff --git a/codex-rs/app-server-protocol/src/protocol/v2.rs b/codex-rs/app-server-protocol/src/protocol/v2.rs
index cdc78647a1..38b6f71353 100644
--- a/codex-rs/app-server-protocol/src/protocol/v2.rs
+++ b/codex-rs/app-server-protocol/src/protocol/v2.rs
@@ -3262,6 +3262,9 @@ pub struct SkillMetadata {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     #[ts(optional)]
     pub dependencies: Option<SkillDependencies>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    #[ts(optional)]
+    pub plugin_id: Option<String>,
     pub path: PathBuf,
     pub scope: SkillScope,
     pub enabled: bool,
@@ -3506,6 +3509,7 @@ impl From<CoreSkillMetadata> for SkillMetadata {
             short_description: value.short_description,
             interface: value.interface.map(SkillInterface::from),
             dependencies: value.dependencies.map(SkillDependencies::from),
+            plugin_id: value.plugin_id,
             path: value.path,
             scope: value.scope.into(),
             enabled: true,
diff --git a/codex-rs/app-server/src/codex_message_processor.rs b/codex-rs/app-server/src/codex_message_processor.rs
index 6475531c07..6c216a181f 100644
--- a/codex-rs/app-server/src/codex_message_processor.rs
+++ b/codex-rs/app-server/src/codex_message_processor.rs
@@ -8205,6 +8205,7 @@ fn skills_to_info(
                             .collect(),
                     }
                 }),
+                plugin_id: skill.plugin_id.clone(),
                 path: skill.path_to_skills_md.clone(),
                 scope: skill.scope.into(),
                 enabled,
diff --git a/codex-rs/core-skills/src/injection.rs b/codex-rs/core-skills/src/injection.rs
index b31885b8c5..737b2e6daf 100644
--- a/codex-rs/core-skills/src/injection.rs
+++ b/codex-rs/core-skills/src/injection.rs
@@ -45,6 +45,7 @@ pub async fn build_skill_injections(
                     skill_name: skill.name.clone(),
                     skill_scope: skill.scope,
                     skill_path: skill.path_to_skills_md.clone(),
+                    plugin_id: skill.plugin_id.clone(),
                     invocation_type: InvocationType::Explicit,
                 });
                 result.items.push(ResponseItem::from(SkillInstructions {
diff --git a/codex-rs/core-skills/src/injection_tests.rs b/codex-rs/core-skills/src/injection_tests.rs
index b8611de4ef..61f0b15252 100644
--- a/codex-rs/core-skills/src/injection_tests.rs
+++ b/codex-rs/core-skills/src/injection_tests.rs
@@ -11,6 +11,7 @@ fn make_skill(name: &str, path: &str) -> SkillMetadata {
         interface: None,
         dependencies: None,
         policy: None,
+        plugin_id: None,
         path_to_skills_md: PathBuf::from(path),
         scope: codex_protocol::protocol::SkillScope::User,
     }
diff --git a/codex-rs/core-skills/src/invocation_utils_tests.rs b/codex-rs/core-skills/src/invocation_utils_tests.rs
index 6d74dbe9a7..329d81689a 100644
--- a/codex-rs/core-skills/src/invocation_utils_tests.rs
+++ b/codex-rs/core-skills/src/invocation_utils_tests.rs
@@ -18,6 +18,7 @@ fn test_skill_metadata(skill_doc_path: PathBuf) -> SkillMetadata {
         interface: None,
         dependencies: None,
         policy: None,
+        plugin_id: None,
         path_to_skills_md: skill_doc_path,
         scope: codex_protocol::protocol::SkillScope::User,
     }
diff --git a/codex-rs/core-skills/src/lib.rs b/codex-rs/core-skills/src/lib.rs
index b967e4dddc..47142637ad 100644
--- a/codex-rs/core-skills/src/lib.rs
+++ b/codex-rs/core-skills/src/lib.rs
@@ -14,6 +14,7 @@ pub use env_var_dependencies::SkillDependencyInfo;
 pub use env_var_dependencies::collect_env_var_dependencies;
 pub(crate) use invocation_utils::build_implicit_skill_path_indexes;
 pub use invocation_utils::detect_implicit_skill_invocation_for_command;
+pub use loader::PluginSkillRoot;
 pub use manager::SkillsLoadInput;
 pub use manager::SkillsManager;
 pub use mention_counts::build_skill_name_counts;
diff --git a/codex-rs/core-skills/src/loader.rs b/codex-rs/core-skills/src/loader.rs
index 42de9fb288..fb62e76007 100644
--- a/codex-rs/core-skills/src/loader.rs
+++ b/codex-rs/core-skills/src/loader.rs
@@ -147,6 +147,13 @@ impl Error for SkillParseError {}
 pub struct SkillRoot {
     pub path: PathBuf,
     pub scope: SkillScope,
+    pub plugin_id: Option<String>,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct PluginSkillRoot {
+    pub path: PathBuf,
+    pub plugin_id: String,
 }
 
 pub fn load_skills_from_roots<I>(roots: I) -> SkillLoadOutcome
@@ -155,7 +162,12 @@ where
 {
     let mut outcome = SkillLoadOutcome::default();
     for root in roots {
-        discover_skills_under_root(&root.path, root.scope, &mut outcome);
+        discover_skills_under_root(
+            &root.path,
+            root.scope,
+            root.plugin_id.as_deref(),
+            &mut outcome,
+        );
     }
 
     let mut seen: HashSet<PathBuf> = HashSet::new();
@@ -186,7 +198,7 @@ where
 pub(crate) fn skill_roots(
     config_layer_stack: &ConfigLayerStack,
     cwd: &Path,
-    plugin_skill_roots: Vec<PathBuf>,
+    plugin_skill_roots: Vec<PluginSkillRoot>,
 ) -> Vec<SkillRoot> {
     skill_roots_with_home_dir(
         config_layer_stack,
@@ -200,12 +212,13 @@ fn skill_roots_with_home_dir(
     config_layer_stack: &ConfigLayerStack,
     cwd: &Path,
     home_dir: Option<&Path>,
-    plugin_skill_roots: Vec<PathBuf>,
+    plugin_skill_roots: Vec<PluginSkillRoot>,
 ) -> Vec<SkillRoot> {
     let mut roots = skill_roots_from_layer_stack_inner(config_layer_stack, home_dir);
-    roots.extend(plugin_skill_roots.into_iter().map(|path| SkillRoot {
-        path,
+    roots.extend(plugin_skill_roots.into_iter().map(|root| SkillRoot {
+        path: root.path,
         scope: SkillScope::User,
+        plugin_id: Some(root.plugin_id),
     }));
     roots.extend(repo_agents_skill_roots(config_layer_stack, cwd));
     dedupe_skill_roots_by_path(&mut roots);
@@ -231,6 +244,7 @@ fn skill_roots_from_layer_stack_inner(
                 roots.push(SkillRoot {
                     path: config_folder.as_path().join(SKILLS_DIR_NAME),
                     scope: SkillScope::Repo,
+                    plugin_id: None,
                 });
             }
             ConfigLayerSource::User { .. } => {
@@ -239,6 +253,7 @@ fn skill_roots_from_layer_stack_inner(
                 roots.push(SkillRoot {
                     path: config_folder.as_path().join(SKILLS_DIR_NAME),
                     scope: SkillScope::User,
+                    plugin_id: None,
                 });
 
                 // `$HOME/.agents/skills` (user-installed skills).
@@ -246,6 +261,7 @@ fn skill_roots_from_layer_stack_inner(
                     roots.push(SkillRoot {
                         path: home_dir.join(AGENTS_DIR_NAME).join(SKILLS_DIR_NAME),
                         scope: SkillScope::User,
+                        plugin_id: None,
                     });
                 }
 
@@ -254,6 +270,7 @@ fn skill_roots_from_layer_stack_inner(
                 roots.push(SkillRoot {
                     path: system_cache_root_dir(config_folder.as_path()),
                     scope: SkillScope::System,
+                    plugin_id: None,
                 });
             }
             ConfigLayerSource::System { .. } => {
@@ -262,6 +279,7 @@ fn skill_roots_from_layer_stack_inner(
                 roots.push(SkillRoot {
                     path: config_folder.as_path().join(SKILLS_DIR_NAME),
                     scope: SkillScope::Admin,
+                    plugin_id: None,
                 });
             }
             ConfigLayerSource::Mdm { .. }
@@ -285,6 +303,7 @@ fn repo_agents_skill_roots(config_layer_stack: &ConfigLayerStack, cwd: &Path) ->
             roots.push(SkillRoot {
                 path: agents_skills,
                 scope: SkillScope::Repo,
+                plugin_id: None,
             });
         }
     }
@@ -353,7 +372,12 @@ fn dedupe_skill_roots_by_path(roots: &mut Vec<SkillRoot>) {
     roots.retain(|root| seen.insert(root.path.clone()));
 }
 
-fn discover_skills_under_root(root: &Path, scope: SkillScope, outcome: &mut SkillLoadOutcome) {
+fn discover_skills_under_root(
+    root: &Path,
+    scope: SkillScope,
+    plugin_id: Option<&str>,
+    outcome: &mut SkillLoadOutcome,
+) {
     let Ok(root) = canonicalize_path(root) else {
         return;
     };
@@ -466,7 +490,7 @@ fn discover_skills_under_root(root: &Path, scope: SkillScope, outcome: &mut Skil
             }
 
             if file_type.is_file() && file_name == SKILLS_FILENAME {
-                match parse_skill_file(&path, scope) {
+                match parse_skill_file(&path, scope, plugin_id) {
                     Ok(skill) => {
                         outcome.skills.push(skill);
                     }
@@ -492,7 +516,11 @@ fn discover_skills_under_root(root: &Path, scope: SkillScope, outcome: &mut Skil
     }
 }
 
-fn parse_skill_file(path: &Path, scope: SkillScope) -> Result<SkillMetadata, SkillParseError> {
+fn parse_skill_file(
+    path: &Path,
+    scope: SkillScope,
+    plugin_id: Option<&str>,
+) -> Result<SkillMetadata, SkillParseError> {
     let contents = fs::read_to_string(path).map_err(SkillParseError::Read)?;
 
     let frontmatter = extract_frontmatter(&contents).ok_or(SkillParseError::MissingFrontmatter)?;
@@ -543,6 +571,7 @@ fn parse_skill_file(path: &Path, scope: SkillScope) -> Result<SkillMetadata, Ski
         interface,
         dependencies,
         policy,
+        plugin_id: plugin_id.map(str::to_string),
         path_to_skills_md: resolved_path,
         scope,
     })
diff --git a/codex-rs/core-skills/src/loader_tests.rs b/codex-rs/core-skills/src/loader_tests.rs
index 3702856306..cbd86c4d83 100644
--- a/codex-rs/core-skills/src/loader_tests.rs
+++ b/codex-rs/core-skills/src/loader_tests.rs
@@ -284,6 +284,7 @@ fn loads_skills_from_home_agents_dir_for_user_scope() -> anyhow::Result<()> {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::User,
         }]
@@ -434,6 +435,7 @@ async fn loads_skill_dependencies_metadata_from_yaml() {
                 ],
             }),
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::User,
         }]
@@ -489,6 +491,7 @@ interface:
             }),
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(skill_path.as_path()),
             scope: SkillScope::User,
         }]
@@ -642,6 +645,7 @@ async fn accepts_icon_paths_under_assets_dir() {
             }),
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::User,
         }]
@@ -682,6 +686,7 @@ async fn ignores_invalid_brand_color() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::User,
         }]
@@ -735,6 +740,7 @@ async fn ignores_default_prompt_over_max_length() {
             }),
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::User,
         }]
@@ -776,6 +782,7 @@ async fn drops_interface_when_icons_are_invalid() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::User,
         }]
@@ -820,6 +827,7 @@ async fn loads_skills_via_symlinked_subdir_for_user_scope() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&shared_skill_path),
             scope: SkillScope::User,
         }]
@@ -879,6 +887,7 @@ async fn does_not_loop_on_symlink_cycle_for_user_scope() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::User,
         }]
@@ -899,6 +908,7 @@ fn loads_skills_via_symlinked_subdir_for_admin_scope() {
     let outcome = load_skills_from_roots([SkillRoot {
         path: admin_root.path().to_path_buf(),
         scope: SkillScope::Admin,
+        plugin_id: None,
     }]);
 
     assert!(
@@ -915,6 +925,7 @@ fn loads_skills_via_symlinked_subdir_for_admin_scope() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&shared_skill_path),
             scope: SkillScope::Admin,
         }]
@@ -954,6 +965,7 @@ async fn loads_skills_via_symlinked_subdir_for_repo_scope() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&linked_skill_path),
             scope: SkillScope::Repo,
         }]
@@ -975,6 +987,7 @@ async fn system_scope_ignores_symlinked_subdir() {
     let outcome = load_skills_from_roots([SkillRoot {
         path: system_root,
         scope: SkillScope::System,
+        plugin_id: None,
     }]);
     assert!(
         outcome.errors.is_empty(),
@@ -1005,6 +1018,7 @@ async fn respects_max_scan_depth_for_user_scope() {
     let outcome = load_skills_from_roots([SkillRoot {
         path: skills_root,
         scope: SkillScope::User,
+        plugin_id: None,
     }]);
 
     assert!(
@@ -1021,6 +1035,7 @@ async fn respects_max_scan_depth_for_user_scope() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&within_depth_path),
             scope: SkillScope::User,
         }]
@@ -1048,6 +1063,7 @@ async fn loads_valid_skill() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::User,
         }]
@@ -1080,6 +1096,7 @@ async fn falls_back_to_directory_name_when_skill_name_is_missing() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::User,
         }]
@@ -1105,6 +1122,7 @@ async fn namespaces_plugin_skills_using_plugin_name() {
     let outcome = load_skills_from_roots([SkillRoot {
         path: plugin_root.join("skills"),
         scope: SkillScope::User,
+        plugin_id: Some("sample@marketplace".to_string()),
     }]);
 
     assert!(
@@ -1121,6 +1139,7 @@ async fn namespaces_plugin_skills_using_plugin_name() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: Some("sample@marketplace".to_string()),
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::User,
         }]
@@ -1152,6 +1171,7 @@ async fn loads_short_description_from_metadata() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::User,
         }]
@@ -1264,6 +1284,7 @@ async fn loads_skills_from_repo_root() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::Repo,
         }]
@@ -1299,6 +1320,7 @@ async fn loads_skills_from_agents_dir_without_codex_dir() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::Repo,
         }]
@@ -1352,6 +1374,7 @@ async fn loads_skills_from_all_codex_dirs_under_project_root() {
                 interface: None,
                 dependencies: None,
                 policy: None,
+                plugin_id: None,
                 path_to_skills_md: normalized(&nested_skill_path),
                 scope: SkillScope::Repo,
             },
@@ -1362,6 +1385,7 @@ async fn loads_skills_from_all_codex_dirs_under_project_root() {
                 interface: None,
                 dependencies: None,
                 policy: None,
+                plugin_id: None,
                 path_to_skills_md: normalized(&root_skill_path),
                 scope: SkillScope::Repo,
             },
@@ -1401,6 +1425,7 @@ async fn loads_skills_from_codex_dir_when_not_git_repo() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::Repo,
         }]
@@ -1417,10 +1442,12 @@ async fn deduplicates_by_path_preferring_first_root() {
         SkillRoot {
             path: root.path().to_path_buf(),
             scope: SkillScope::Repo,
+            plugin_id: None,
         },
         SkillRoot {
             path: root.path().to_path_buf(),
             scope: SkillScope::User,
+            plugin_id: None,
         },
     ]);
 
@@ -1438,6 +1465,7 @@ async fn deduplicates_by_path_preferring_first_root() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::Repo,
         }]
@@ -1479,6 +1507,7 @@ async fn keeps_duplicate_names_from_repo_and_user() {
                 interface: None,
                 dependencies: None,
                 policy: None,
+                plugin_id: None,
                 path_to_skills_md: normalized(&repo_skill_path),
                 scope: SkillScope::Repo,
             },
@@ -1489,6 +1518,7 @@ async fn keeps_duplicate_names_from_repo_and_user() {
                 interface: None,
                 dependencies: None,
                 policy: None,
+                plugin_id: None,
                 path_to_skills_md: normalized(&user_skill_path),
                 scope: SkillScope::User,
             },
@@ -1552,6 +1582,7 @@ async fn keeps_duplicate_names_from_nested_codex_dirs() {
                 interface: None,
                 dependencies: None,
                 policy: None,
+                plugin_id: None,
                 path_to_skills_md: first_path,
                 scope: SkillScope::Repo,
             },
@@ -1562,6 +1593,7 @@ async fn keeps_duplicate_names_from_nested_codex_dirs() {
                 interface: None,
                 dependencies: None,
                 policy: None,
+                plugin_id: None,
                 path_to_skills_md: second_path,
                 scope: SkillScope::Repo,
             },
@@ -1633,6 +1665,7 @@ async fn loads_skills_when_cwd_is_file_in_repo() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::Repo,
         }]
@@ -1691,6 +1724,7 @@ async fn loads_skills_from_system_cache_when_present() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: normalized(&skill_path),
             scope: SkillScope::System,
         }]
diff --git a/codex-rs/core-skills/src/manager.rs b/codex-rs/core-skills/src/manager.rs
index cd3b427714..ee7e36d6b7 100644
--- a/codex-rs/core-skills/src/manager.rs
+++ b/codex-rs/core-skills/src/manager.rs
@@ -16,6 +16,7 @@ use crate::build_implicit_skill_path_indexes;
 use crate::config_rules::SkillConfigRules;
 use crate::config_rules::resolve_disabled_skill_paths;
 use crate::config_rules::skill_config_rules_from_stack;
+use crate::loader::PluginSkillRoot;
 use crate::loader::SkillRoot;
 use crate::loader::load_skills_from_roots;
 use crate::loader::skill_roots;
@@ -26,7 +27,7 @@ use codex_config::SkillsConfig;
 #[derive(Debug, Clone)]
 pub struct SkillsLoadInput {
     pub cwd: PathBuf,
-    pub effective_skill_roots: Vec<PathBuf>,
+    pub effective_skill_roots: Vec<PluginSkillRoot>,
     pub config_layer_stack: ConfigLayerStack,
     pub bundled_skills_enabled: bool,
 }
@@ -34,7 +35,7 @@ pub struct SkillsLoadInput {
 impl SkillsLoadInput {
     pub fn new(
         cwd: PathBuf,
-        effective_skill_roots: Vec<PathBuf>,
+        effective_skill_roots: Vec<PluginSkillRoot>,
         config_layer_stack: ConfigLayerStack,
         bundled_skills_enabled: bool,
     ) -> Self {
@@ -154,6 +155,7 @@ impl SkillsManager {
                 .map(|path| SkillRoot {
                     path,
                     scope: SkillScope::User,
+                    plugin_id: None,
                 }),
         );
         let skill_config_rules = skill_config_rules_from_stack(&input.config_layer_stack);
diff --git a/codex-rs/core-skills/src/manager_tests.rs b/codex-rs/core-skills/src/manager_tests.rs
index 62218f7311..f4804447f7 100644
--- a/codex-rs/core-skills/src/manager_tests.rs
+++ b/codex-rs/core-skills/src/manager_tests.rs
@@ -57,6 +57,7 @@ fn test_skill(name: &str, path: PathBuf) -> SkillMetadata {
         interface: None,
         dependencies: None,
         policy: None,
+        plugin_id: None,
         path_to_skills_md: path,
         scope: SkillScope::User,
     }
@@ -122,7 +123,7 @@ fn skills_for_config_with_stack(
     skills_manager: &SkillsManager,
     cwd: &TempDir,
     config_layer_stack: &ConfigLayerStack,
-    effective_skill_roots: &[PathBuf],
+    effective_skill_roots: &[PluginSkillRoot],
 ) -> SkillLoadOutcome {
     let skills_input = SkillsLoadInput::new(
         cwd.path().to_path_buf(),
@@ -198,6 +199,10 @@ async fn skills_for_config_disables_plugin_skills_by_name() {
         .and_then(std::path::Path::parent)
         .expect("plugin skill should live under a skills root")
         .to_path_buf();
+    let plugin_skill_root = PluginSkillRoot {
+        path: plugin_skill_root,
+        plugin_id: "sample@test".to_string(),
+    };
     let skills_manager = SkillsManager::new(
         codex_home.path().to_path_buf(),
         /*bundled_skills_enabled*/ true,
@@ -217,6 +222,7 @@ async fn skills_for_config_disables_plugin_skills_by_name() {
     let skill_path = dunce::canonicalize(skill_path).expect("skill path should canonicalize");
 
     assert_eq!(skill.path_to_skills_md, skill_path);
+    assert_eq!(skill.plugin_id, Some("sample@test".to_string()));
     assert!(outcome.disabled_paths.contains(&skill.path_to_skills_md));
     assert!(
         !outcome
diff --git a/codex-rs/core-skills/src/model.rs b/codex-rs/core-skills/src/model.rs
index 319ca4e64e..9372dfdefa 100644
--- a/codex-rs/core-skills/src/model.rs
+++ b/codex-rs/core-skills/src/model.rs
@@ -14,6 +14,7 @@ pub struct SkillMetadata {
     pub interface: Option<SkillInterface>,
     pub dependencies: Option<SkillDependencies>,
     pub policy: Option<SkillPolicy>,
+    pub plugin_id: Option<String>,
     /// Path to the SKILLS.md file that declares this skill.
     pub path_to_skills_md: PathBuf,
     pub scope: SkillScope,
diff --git a/codex-rs/core/src/agent/role_tests.rs b/codex-rs/core/src/agent/role_tests.rs
index 5b3941ebda..4ad43e73ec 100644
--- a/codex-rs/core/src/agent/role_tests.rs
+++ b/codex-rs/core/src/agent/role_tests.rs
@@ -641,7 +641,7 @@ enabled = false
         /*bundled_skills_enabled*/ true,
     );
     let plugin_outcome = plugins_manager.plugins_for_config(&config);
-    let effective_skill_roots = plugin_outcome.effective_skill_roots();
+    let effective_skill_roots = crate::plugins::effective_plugin_skill_roots(&plugin_outcome);
     let skills_input = skills_load_input_from_config(&config, effective_skill_roots);
     let outcome = skills_manager.skills_for_config(&skills_input);
     let skill = outcome
diff --git a/codex-rs/core/src/codex.rs b/codex-rs/core/src/codex.rs
index 758b592047..86cc40d78b 100644
--- a/codex-rs/core/src/codex.rs
+++ b/codex-rs/core/src/codex.rs
@@ -26,6 +26,7 @@ use crate::connectors;
 use crate::exec_policy::ExecPolicyManager;
 use crate::parse_turn_item;
 use crate::path_utils::normalize_for_native_workdir;
+use crate::plugins::effective_plugin_skill_roots;
 use crate::realtime_conversation::RealtimeConversationManager;
 use crate::realtime_conversation::handle_audio as handle_realtime_conversation_audio;
 use crate::realtime_conversation::handle_close as handle_realtime_conversation_close;
@@ -489,7 +490,7 @@ impl Codex {
         let (tx_event, rx_event) = async_channel::unbounded();
 
         let plugin_outcome = plugins_manager.plugins_for_config(&config);
-        let effective_skill_roots = plugin_outcome.effective_skill_roots();
+        let effective_skill_roots = effective_plugin_skill_roots(&plugin_outcome);
         let skills_input = skills_load_input_from_config(&config, effective_skill_roots);
         let loaded_skills = skills_manager.skills_for_config(&skills_input);
 
@@ -2519,7 +2520,7 @@ impl Session {
             .services
             .plugins_manager
             .plugins_for_config(&per_turn_config);
-        let effective_skill_roots = plugin_outcome.effective_skill_roots();
+        let effective_skill_roots = effective_plugin_skill_roots(&plugin_outcome);
         let skills_input = skills_load_input_from_config(&per_turn_config, effective_skill_roots);
         let skills_outcome = Arc::new(
             self.services
@@ -5763,6 +5764,7 @@ fn skills_to_info(
                         .collect(),
                 }
             }),
+            plugin_id: skill.plugin_id.clone(),
             path: skill.path_to_skills_md.clone(),
             scope: skill.scope,
             enabled: !disabled_paths.contains(&skill.path_to_skills_md),
diff --git a/codex-rs/core/src/codex_tests.rs b/codex-rs/core/src/codex_tests.rs
index 85404d4d56..effc83a722 100644
--- a/codex-rs/core/src/codex_tests.rs
+++ b/codex-rs/core/src/codex_tests.rs
@@ -2747,7 +2747,7 @@ pub(crate) async fn make_session_and_context() -> (Session, TurnContext) {
     let plugin_outcome = services
         .plugins_manager
         .plugins_for_config(&per_turn_config);
-    let effective_skill_roots = plugin_outcome.effective_skill_roots();
+    let effective_skill_roots = crate::plugins::effective_plugin_skill_roots(&plugin_outcome);
     let skills_input =
         crate::skills_load_input_from_config(&per_turn_config, effective_skill_roots);
     let skills_outcome = Arc::new(services.skills_manager.skills_for_config(&skills_input));
@@ -3587,7 +3587,7 @@ pub(crate) async fn make_session_and_context_with_dynamic_tools_and_rx(
     let plugin_outcome = services
         .plugins_manager
         .plugins_for_config(&per_turn_config);
-    let effective_skill_roots = plugin_outcome.effective_skill_roots();
+    let effective_skill_roots = crate::plugins::effective_plugin_skill_roots(&plugin_outcome);
     let skills_input =
         crate::skills_load_input_from_config(&per_turn_config, effective_skill_roots);
     let skills_outcome = Arc::new(services.skills_manager.skills_for_config(&skills_input));
diff --git a/codex-rs/core/src/plugins/manager.rs b/codex-rs/core/src/plugins/manager.rs
index 2b21a23703..7c18bc4fce 100644
--- a/codex-rs/core/src/plugins/manager.rs
+++ b/codex-rs/core/src/plugins/manager.rs
@@ -37,6 +37,7 @@ use crate::config_loader::ConfigLayerStack;
 use crate::config_rules::SkillConfigRules;
 use crate::config_rules::resolve_disabled_skill_paths;
 use crate::config_rules::skill_config_rules_from_stack;
+use crate::loader::PluginSkillRoot;
 use crate::loader::SkillRoot;
 use crate::loader::load_skills_from_roots;
 use codex_analytics::AnalyticsEventsClient;
@@ -189,6 +190,32 @@ pub struct ConfiguredMarketplaceListOutcome {
     pub errors: Vec<MarketplaceListError>,
 }
 
+pub fn effective_plugin_skill_roots(outcome: &PluginLoadOutcome) -> Vec<PluginSkillRoot> {
+    let mut roots = outcome
+        .plugins()
+        .iter()
+        .filter(|plugin| plugin.is_active())
+        .flat_map(|plugin| {
+            plugin
+                .skill_roots
+                .iter()
+                .cloned()
+                .map(|path| PluginSkillRoot {
+                    path,
+                    plugin_id: plugin.config_name.clone(),
+                })
+        })
+        .collect::<Vec<_>>();
+    roots.sort_unstable_by(|left, right| {
+        left.path
+            .cmp(&right.path)
+            .then_with(|| left.plugin_id.cmp(&right.plugin_id))
+    });
+    let mut seen_paths = HashSet::new();
+    roots.retain(|root| seen_paths.insert(root.path.clone()));
+    roots
+}
+
 impl From<PluginDetail> for PluginCapabilitySummary {
     fn from(value: PluginDetail) -> Self {
         let has_skills = value.skills.iter().any(|skill| {
@@ -412,12 +439,16 @@ impl PluginsManager {
         &self,
         config_layer_stack: &ConfigLayerStack,
         plugins_feature_enabled: bool,
-    ) -> Vec<PathBuf> {
+    ) -> Vec<PluginSkillRoot> {
         if !plugins_feature_enabled {
             return Vec::new();
         }
-        load_plugins_from_layer_stack(config_layer_stack, &self.store, self.restriction_product)
-            .effective_skill_roots()
+        let outcome = load_plugins_from_layer_stack(
+            config_layer_stack,
+            &self.store,
+            self.restriction_product,
+        );
+        effective_plugin_skill_roots(&outcome)
     }
 
     fn cached_enabled_outcome(&self) -> Option<PluginLoadOutcome> {
@@ -963,6 +994,7 @@ impl PluginsManager {
         let resolved_skills = load_plugin_skills(
             source_path.as_path(),
             manifest_paths,
+            plugin_key.as_str(),
             self.restriction_product,
             &skill_config_rules,
         );
@@ -1461,6 +1493,7 @@ fn load_plugin(
     let resolved_skills = load_plugin_skills(
         plugin_root.as_path(),
         manifest_paths,
+        loaded_plugin.config_name.as_str(),
         restriction_product,
         skill_config_rules,
     );
@@ -1506,6 +1539,7 @@ impl ResolvedPluginSkills {
 fn load_plugin_skills(
     plugin_root: &Path,
     manifest_paths: &PluginManifestPaths,
+    plugin_id: &str,
     restriction_product: Option<Product>,
     skill_config_rules: &SkillConfigRules,
 ) -> ResolvedPluginSkills {
@@ -1515,6 +1549,7 @@ fn load_plugin_skills(
             .map(|path| SkillRoot {
                 path,
                 scope: SkillScope::User,
+                plugin_id: Some(plugin_id.to_string()),
             }),
     );
     let had_errors = !outcome.errors.is_empty();
diff --git a/codex-rs/core/src/plugins/manager_tests.rs b/codex-rs/core/src/plugins/manager_tests.rs
index a9f455bbc4..aed6237cfe 100644
--- a/codex-rs/core/src/plugins/manager_tests.rs
+++ b/codex-rs/core/src/plugins/manager_tests.rs
@@ -189,6 +189,13 @@ fn load_plugins_loads_default_skills_and_mcp_servers() {
         outcome.effective_skill_roots(),
         vec![plugin_root.join("skills")]
     );
+    assert_eq!(
+        effective_plugin_skill_roots(&outcome),
+        vec![crate::loader::PluginSkillRoot {
+            path: plugin_root.join("skills"),
+            plugin_id: "sample@test".to_string(),
+        }]
+    );
     assert_eq!(outcome.effective_mcp_servers().len(), 1);
     assert_eq!(
         outcome.effective_apps(),
diff --git a/codex-rs/core/src/plugins/mod.rs b/codex-rs/core/src/plugins/mod.rs
index a86502c28c..3ae9b890e7 100644
--- a/codex-rs/core/src/plugins/mod.rs
+++ b/codex-rs/core/src/plugins/mod.rs
@@ -40,6 +40,7 @@ pub use manager::PluginRemoteSyncError;
 pub use manager::PluginUninstallError;
 pub use manager::PluginsManager;
 pub use manager::RemotePluginSyncResult;
+pub use manager::effective_plugin_skill_roots;
 pub use manager::installed_plugin_telemetry_metadata;
 pub use manager::load_plugin_apps;
 pub use manager::load_plugin_mcp_servers;
diff --git a/codex-rs/core/src/skills.rs b/codex-rs/core/src/skills.rs
index 8d6886222a..fd72aff9e6 100644
--- a/codex-rs/core/src/skills.rs
+++ b/codex-rs/core/src/skills.rs
@@ -2,7 +2,6 @@ use std::collections::HashMap;
 use std::collections::HashSet;
 use std::env;
 use std::path::Path;
-use std::path::PathBuf;
 use std::sync::Arc;
 
 use crate::codex::Session;
@@ -43,7 +42,7 @@ pub use codex_core_skills::system;
 
 pub(crate) fn skills_load_input_from_config(
     config: &Config,
-    effective_skill_roots: Vec<PathBuf>,
+    effective_skill_roots: Vec<codex_core_skills::PluginSkillRoot>,
 ) -> SkillsLoadInput {
     SkillsLoadInput::new(
         config.cwd.clone().to_path_buf(),
@@ -185,6 +184,7 @@ pub(crate) async fn maybe_emit_implicit_skill_invocation(
         skill_name: candidate.name,
         skill_scope: candidate.scope,
         skill_path: candidate.path_to_skills_md,
+        plugin_id: candidate.plugin_id,
         invocation_type: InvocationType::Implicit,
     };
     let skill_scope = match invocation.skill_scope {
diff --git a/codex-rs/core/src/skills_watcher.rs b/codex-rs/core/src/skills_watcher.rs
index b5a1256cdb..09e7c882da 100644
--- a/codex-rs/core/src/skills_watcher.rs
+++ b/codex-rs/core/src/skills_watcher.rs
@@ -17,6 +17,7 @@ use crate::file_watcher::ThrottledWatchReceiver;
 use crate::file_watcher::WatchPath;
 use crate::file_watcher::WatchRegistration;
 use crate::plugins::PluginsManager;
+use crate::plugins::effective_plugin_skill_roots;
 use crate::skills_load_input_from_config;
 
 #[cfg(not(test))]
@@ -61,7 +62,7 @@ impl SkillsWatcher {
         plugins_manager: &PluginsManager,
     ) -> WatchRegistration {
         let plugin_outcome = plugins_manager.plugins_for_config(config);
-        let effective_skill_roots = plugin_outcome.effective_skill_roots();
+        let effective_skill_roots = effective_plugin_skill_roots(&plugin_outcome);
         let skills_input = skills_load_input_from_config(config, effective_skill_roots);
         let roots = skills_manager
             .skill_roots_for_config(&skills_input)
diff --git a/codex-rs/protocol/src/protocol.rs b/codex-rs/protocol/src/protocol.rs
index 5e0c6010e4..7991a829f6 100644
--- a/codex-rs/protocol/src/protocol.rs
+++ b/codex-rs/protocol/src/protocol.rs
@@ -3160,6 +3160,9 @@ pub struct SkillMetadata {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     #[ts(optional)]
     pub dependencies: Option<SkillDependencies>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    #[ts(optional)]
+    pub plugin_id: Option<String>,
     pub path: PathBuf,
     pub scope: SkillScope,
     pub enabled: bool,
diff --git a/codex-rs/tui/src/app.rs b/codex-rs/tui/src/app.rs
index 4feefcac93..c13f5673a8 100644
--- a/codex-rs/tui/src/app.rs
+++ b/codex-rs/tui/src/app.rs
@@ -375,6 +375,7 @@ fn list_skills_response_to_core(response: SkillsListResponse) -> ListSkillsRespo
                                     .collect(),
                             }
                         }),
+                        plugin_id: skill.plugin_id,
                         path: skill.path,
                         scope: match skill.scope {
                             codex_app_server_protocol::SkillScope::User => {
diff --git a/codex-rs/tui/src/bottom_pane/chat_composer.rs b/codex-rs/tui/src/bottom_pane/chat_composer.rs
index 6cf6c18d32..42eb37976e 100644
--- a/codex-rs/tui/src/bottom_pane/chat_composer.rs
+++ b/codex-rs/tui/src/bottom_pane/chat_composer.rs
@@ -4837,6 +4837,7 @@ mod tests {
             }),
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: PathBuf::from("/tmp/repo/google-calendar/SKILL.md"),
             scope: codex_protocol::protocol::SkillScope::Repo,
         }]));
@@ -4935,6 +4936,7 @@ mod tests {
                     }),
                     dependencies: None,
                     policy: None,
+                    plugin_id: None,
                     path_to_skills_md: PathBuf::from("/tmp/repo/google-calendar/SKILL.md"),
                     scope: codex_protocol::protocol::SkillScope::Repo,
                 }]));
diff --git a/codex-rs/tui/src/bottom_pane/mod.rs b/codex-rs/tui/src/bottom_pane/mod.rs
index da5e2421f7..24e574b1b9 100644
--- a/codex-rs/tui/src/bottom_pane/mod.rs
+++ b/codex-rs/tui/src/bottom_pane/mod.rs
@@ -1682,6 +1682,7 @@ mod tests {
                 interface: None,
                 dependencies: None,
                 policy: None,
+                plugin_id: None,
                 path_to_skills_md: PathBuf::from("test-skill"),
                 scope: SkillScope::User,
             }]),
diff --git a/codex-rs/tui/src/chatwidget/skills.rs b/codex-rs/tui/src/chatwidget/skills.rs
index 53dd7e8b8e..83b041c589 100644
--- a/codex-rs/tui/src/chatwidget/skills.rs
+++ b/codex-rs/tui/src/chatwidget/skills.rs
@@ -217,6 +217,7 @@ fn protocol_skill_to_core(skill: &ProtocolSkillMetadata) -> SkillMetadata {
                     .collect(),
             }),
         policy: None,
+        plugin_id: skill.plugin_id.clone(),
         path_to_skills_md: skill.path.clone(),
         scope: skill.scope,
     }
diff --git a/codex-rs/tui/src/chatwidget/tests/composer_submission.rs b/codex-rs/tui/src/chatwidget/tests/composer_submission.rs
index a5678a6b93..718e387edd 100644
--- a/codex-rs/tui/src/chatwidget/tests/composer_submission.rs
+++ b/codex-rs/tui/src/chatwidget/tests/composer_submission.rs
@@ -408,6 +408,7 @@ async fn submission_prefers_selected_duplicate_skill_path() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: repo_skill_path,
             scope: SkillScope::Repo,
         },
@@ -418,6 +419,7 @@ async fn submission_prefers_selected_duplicate_skill_path() {
             interface: None,
             dependencies: None,
             policy: None,
+            plugin_id: None,
             path_to_skills_md: user_skill_path.clone(),
             scope: SkillScope::User,
         },