diff --git a/src/filetransfer/params/aws_s3.rs b/src/filetransfer/params/aws_s3.rs
index d053703..0c0ac97 100644
--- a/src/filetransfer/params/aws_s3.rs
+++ b/src/filetransfer/params/aws_s3.rs
@@ -1,14 +1,28 @@
+//! ## AWS S3 Parameters
+//!
+//! Defines the runtime connection parameters used to build AWS S3 and
+//! S3-compatible remote filesystem clients.
+
 /// Connection parameters for AWS S3 protocol
 #[derive(Debug, Clone)]
 pub struct AwsS3Params {
+    /// Target bucket name.
     pub bucket_name: String,
+    /// Target region.
     pub region: Option<String>,
+    /// Optional custom endpoint URL.
     pub endpoint: Option<String>,
+    /// Optional shared credentials profile.
     pub profile: Option<String>,
+    /// Optional static access key.
     pub access_key: Option<String>,
+    /// Optional static secret access key.
     pub secret_access_key: Option<String>,
+    /// Optional security token for temporary credentials.
     pub security_token: Option<String>,
+    /// Optional session token for temporary credentials.
     pub session_token: Option<String>,
+    /// Whether to force path-style bucket addressing.
     pub new_path_style: bool,
 }
 
diff --git a/src/filetransfer/params/kube.rs b/src/filetransfer/params/kube.rs
index c9ac991..19a4e3c 100644
--- a/src/filetransfer/params/kube.rs
+++ b/src/filetransfer/params/kube.rs
@@ -1,22 +1,35 @@
+//! ## Kubernetes Parameters
+//!
+//! Defines the runtime parameters used to construct Kubernetes-backed file
+//! transfer clients.
+
 use remotefs_kube::Config;
 
-/// Protocol params used by WebDAV
+/// Protocol params used by Kubernetes connections.
 #[derive(Debug, Clone)]
 pub struct KubeProtocolParams {
+    /// Optional namespace for the default pod context.
     pub namespace: Option<String>,
+    /// Optional Kubernetes API URL.
     pub cluster_url: Option<String>,
+    /// Optional username override.
     pub username: Option<String>,
+    /// Optional client certificate path.
     pub client_cert: Option<String>,
+    /// Optional client key path.
     pub client_key: Option<String>,
 }
 
 impl KubeProtocolParams {
+    /// Kubernetes connections do not use the shared password secret flow.
     pub fn set_default_secret(&mut self, _secret: String) {}
 
+    /// Kubernetes params never require the generic password prompt.
     pub fn password_missing(&self) -> bool {
         false
     }
 
+    /// Converts bookmark/runtime parameters into a `remotefs_kube` config.
     pub fn config(self) -> Option<Config> {
         if let Some(cluster_url) = self.cluster_url {
             let mut config = Config::new(cluster_url.parse().unwrap_or_default());
diff --git a/src/filetransfer/params/smb.rs b/src/filetransfer/params/smb.rs
index 411eb3a..234ae21 100644
--- a/src/filetransfer/params/smb.rs
+++ b/src/filetransfer/params/smb.rs
@@ -1,13 +1,24 @@
+//! ## SMB Parameters
+//!
+//! Defines the runtime connection parameters used to build SMB remote
+//! filesystem clients.
+
 /// Connection parameters for SMB protocol
 #[derive(Debug, Clone)]
 pub struct SmbParams {
+    /// Hostname or address of the SMB server.
     pub address: String,
     #[cfg(posix)]
+    /// SMB service port used on POSIX platforms.
     pub port: u16,
+    /// Share name to mount.
     pub share: String,
+    /// Optional username.
     pub username: Option<String>,
+    /// Optional password.
     pub password: Option<String>,
     #[cfg(posix)]
+    /// Optional workgroup used on POSIX platforms.
     pub workgroup: Option<String>,
 }
 
diff --git a/src/filetransfer/params/webdav.rs b/src/filetransfer/params/webdav.rs
index 9c8bec1..78b787d 100644
--- a/src/filetransfer/params/webdav.rs
+++ b/src/filetransfer/params/webdav.rs
@@ -1,16 +1,25 @@
+//! ## WebDAV Parameters
+//!
+//! Defines the runtime connection parameters used to build WebDAV clients.
+
 /// Protocol params used by WebDAV
 #[derive(Debug, Clone)]
 pub struct WebDAVProtocolParams {
+    /// Base WebDAV endpoint URI.
     pub uri: String,
+    /// Username used for authentication.
     pub username: String,
+    /// Password used for authentication.
     pub password: String,
 }
 
 impl WebDAVProtocolParams {
+    /// Stores the shared secret as the active WebDAV password.
     pub fn set_default_secret(&mut self, secret: String) {
         self.password = secret;
     }
 
+    /// Returns whether the WebDAV password is currently missing.
     pub fn password_missing(&self) -> bool {
         self.password.is_empty()
     }
diff --git a/src/utils/parser/credentials.rs b/src/utils/parser/credentials.rs
index 4f382a1..b40394a 100644
--- a/src/utils/parser/credentials.rs
+++ b/src/utils/parser/credentials.rs
@@ -1,3 +1,8 @@
+//! ## Parser Credential Helpers
+//!
+//! Shared capture-group helpers used by parser submodules when extracting
+//! credentials and required fields from regex matches.
+
 pub(super) fn optional_capture(groups: &regex::Captures<'_>, index: usize) -> Option<String> {
     groups.get(index).map(|group| group.as_str().to_string())
 }
diff --git a/src/utils/parser/remote.rs b/src/utils/parser/remote.rs
index 3e3fd22..f2e1724 100644
--- a/src/utils/parser/remote.rs
+++ b/src/utils/parser/remote.rs
@@ -1,3 +1,8 @@
+//! ## Parser Remote Helpers
+//!
+//! Implements protocol-specific parsing for remote connection strings while
+//! keeping the public parser API stable.
+
 use std::path::PathBuf;
 
 #[cfg(smb)]