diff --git a/nushell/modules/pj_aliases.nu b/nushell/modules/pj_aliases.nu
index c391716..28da11b 100644
--- a/nushell/modules/pj_aliases.nu
+++ b/nushell/modules/pj_aliases.nu
@@ -14,18 +14,31 @@ export alias ....... = cd ../../../../../..
 export alias ........ = cd ../../../../../../..
 export alias .......... = cd ../../../../../../../..
 
-
-export def py [...rest: string] {
-    if (which ^py | is-not-empty) {
-        ^py ...$rest
-    } else if (which ^python3 | is-not-empty) {
-        ^python3 ...$rest
-    } else {
-        print "Error: Python is not installed or could not be found."
-    }
-}
-
 export alias weather = curl wttr.in
 export alias moon = curl wttr.in/Moon
 export alias quote = curl https://api.quotable.io/random | from json | get content
 export alias dadjoke = curl -H "Accept: application/json" https://icanhazdadjoke.com/ | from json | get joke
+
+# --- Git ---
+export alias g = git
+
+# --- Navigation & Shell ---
+export alias c = clear
+export def reload [] { exec nu }
+export def edit [] { ^$env.EDITOR ($env.NU_POLYJUICE_PATH | path join 'nu_polyjuice.nu') }
+
+# --- File system ---
+export alias tree = ls **/*
+
+# --- Network ---
+export alias myip = curl -s ifconfig.me
+export def ports [] { ^netstat -ano | lines | where {|row| $row | str contains 'LISTENING'} | str trim }
+
+# --- System ---
+export def df [] {
+    if (which ^df | is-not-empty) {
+        ^df -h
+    } else {
+        ^wmic logicaldisk get size,freespace,caption
+    }
+}
diff --git a/nushell/modules/pj_deepseek.nu b/nushell/modules/pj_deepseek.nu
new file mode 100644
index 0000000..e17bf89
--- /dev/null
+++ b/nushell/modules/pj_deepseek.nu
@@ -0,0 +1,54 @@
+const pj_module_dir = (path self | path dirname)
+const pj_cache_dir = ($pj_module_dir | path join '..' 'cache')
+const key_file = ($pj_cache_dir | path join 'deepseek_apikey.toml')
+
+# Save your DeepSeek API key to local cache.
+export def "pj deepseek setkey" [api_key: string] {
+    mkdir $pj_cache_dir
+    let content = $"[apikey]
+key = \"($api_key)\"
+"
+    $content | save -f $key_file
+    print $"(char --unicode '2714') DeepSeek API key saved to ($key_file)"
+}
+
+# Query DeepSeek account balance information.
+export def "pj deepseek" [] {
+    if not ($key_file | path exists) {
+        print $"(char --unicode '274c') No DeepSeek API key found. Use `pj deepseek setkey <api-key>` to set it."
+        return
+    }
+
+    let config = (open $key_file)
+    let api_key = ($config.apikey?.key? | default "")
+
+    if ($api_key | is-empty) {
+        print $"(char --unicode '274c') Invalid API key in config file. Use `pj deepseek setkey <api-key>` to set a new one."
+        return
+    }
+
+    let response = (curl -L -X GET 'https://api.deepseek.com/user/balance' -H 'Accept: application/json' -H $"Authorization: Bearer ($api_key)" | complete)
+
+    if ($response.exit_code != 0) {
+        print $"(char --unicode '274c') Failed to query balance: ($response.stderr)"
+        return
+    }
+
+    let balance = ($response.stdout | from json)
+    let available_text = if $balance.is_available { $'(char --unicode '2705') Yes' } else { $'(char --unicode '274c') No' }
+    let separator = ('' | fill --character (char --unicode '2501') --width 25 --alignment l)
+
+    print ""
+    print "  DeepSeek Account Balance"
+    print $"  ($separator)"
+    print $"  Available    : ($available_text)"
+    print ""
+
+    for info in $balance.balance_infos {
+        print $"  Currency     : ($info.currency)"
+        print $"  Total        : ($info.total_balance)"
+        print $"  Granted      : ($info.granted_balance)"
+        print $"  Topped-up    : ($info.topped_up_balance)"
+        print ""
+    }
+}
diff --git a/nushell/modules/pj_python.nu b/nushell/modules/pj_python.nu
new file mode 100644
index 0000000..870b984
--- /dev/null
+++ b/nushell/modules/pj_python.nu
@@ -0,0 +1,10 @@
+# Python launcher: prefer `py` (Windows launcher), fallback to `python3`
+export def py [...rest: string] {
+    if (which ^py | is-not-empty) {
+        ^py ...$rest
+    } else if (which ^python3 | is-not-empty) {
+        ^python3 ...$rest
+    } else {
+        print "Error: Python is not installed or could not be found."
+    }
+}
diff --git a/nushell/nu_polyjuice.nu b/nushell/nu_polyjuice.nu
index 8718eda..b5cced7 100644
--- a/nushell/nu_polyjuice.nu
+++ b/nushell/nu_polyjuice.nu
@@ -6,6 +6,7 @@ $env.NU_POLYJUICE_PATH = $env.FILE_PWD
 
 # modules
 use modules/pj_aliases.nu *
+use modules/pj_python.nu *
 use modules/pj_brew.nu *
 use modules/pj_uv.nu *
 use modules/pj_completions.nu *
@@ -13,4 +14,5 @@ use modules/pj_helix.nu *
 use modules/pj_fzf.nu *
 use modules/pj_zoxide.nu *
 use modules/pj_historyhintcomplete.nu *
+use modules/pj_deepseek.nu *
 use modules/pj_prompt.nu *