diff --git a/aiserver.py b/aiserver.py
index 141ab656..ebdf7fa8 100644
--- a/aiserver.py
+++ b/aiserver.py
@@ -219,6 +219,7 @@ class vars:
     abort       = False  # Whether or not generation was aborted by clicking on the submit button during generation
     compiling   = False  # If using a TPU Colab, this will be set to True when the TPU backend starts compiling and then set to False again
     checking    = False  # Whether or not we are actively checking to see if TPU backend is compiling or not
+    sp_changed  = False  # This gets set to True whenever a userscript changes the soft prompt so that check_for_sp_change() can alert the browser that the soft prompt has changed
     spfilename  = ""     # Filename of soft prompt to load, or an empty string if not using a soft prompt
     userscripts = []     # List of userscripts to load
     last_userscripts = []  # List of previous userscript filenames from the previous time userscripts were send via usstatitems
@@ -699,13 +700,29 @@ def loadsettings():
 #==================================================================#
 #  Load a soft prompt from a file
 #==================================================================#
+
+def check_for_sp_change():
+    while(True):
+        time.sleep(0.1)
+        if(vars.sp_changed):
+            with app.app_context():
+                emit('from_server', {'cmd': 'spstatitems', 'data': {vars.spfilename: vars.spmeta} if vars.allowsp and len(vars.spfilename) else {}}, namespace=None, broadcast=True)
+            vars.sp_changed = False
+
 def spRequest(filename):
+    if(not vars.allowsp):
+        raise RuntimeError("Soft prompts are not supported by your current model/backend")
+    
+    old_filename = vars.spfilename
+
     vars.spfilename = ""
     settingschanged()
 
     if(len(filename) == 0):
         vars.sp = None
         vars.sp_length = 0
+        if(old_filename != filename):
+            vars.sp_changed = True
         return
 
     global np
@@ -713,7 +730,8 @@ def spRequest(filename):
         import numpy as np
 
     z, version, shape, fortran_order, dtype = fileops.checksp(filename, vars.modeldim)
-    assert isinstance(z, zipfile.ZipFile)
+    if not isinstance(z, zipfile.ZipFile):
+        raise RuntimeError(f"{repr(filename)} is not a valid soft prompt file")
     with z.open('meta.json') as f:
         vars.spmeta = json.load(f)
     z.close()
@@ -749,6 +767,8 @@ def spRequest(filename):
 
     vars.spfilename = filename
     settingschanged()
+    if(old_filename != filename):
+            vars.sp_changed = True
 
 #==================================================================#
 # Startup
@@ -1069,6 +1089,7 @@ from flask_socketio import SocketIO, emit
 app = Flask(__name__, root_path=os.getcwd())
 app.config['SECRET KEY'] = 'secret!'
 socketio = SocketIO(app, async_method="eventlet")
+socketio.start_background_task(check_for_sp_change)
 print("{0}OK!{1}".format(colors.GREEN, colors.END))
 
 # Start transformers and create pipeline
@@ -2199,6 +2220,29 @@ def lua_get_modelbackend():
 def lua_is_custommodel():
     return vars.model in ("GPT2Custom", "NeoCustom", "TPUMeshTransformerGPTJ", "TPUMeshTransformerGPTNeoX")
 
+#==================================================================#
+#  Return the filename (as a string) of the current soft prompt, or
+#  None if no soft prompt is loaded
+#==================================================================#
+@bridged_kwarg()
+def lua_get_spfilename():
+    return vars.spfilename.strip() or None
+
+#==================================================================#
+#  When called with a string as argument, sets the current soft prompt;
+#  when called with None as argument, uses no soft prompt.
+#  Returns True if soft prompt changed, False otherwise.
+#==================================================================#
+@bridged_kwarg()
+def lua_set_spfilename(filename: Union[str, None]):
+    if(filename is None):
+        filename = ""
+    filename = str(filename).strip()
+    changed = lua_get_spfilename() != filename
+    assert all(q not in filename for q in ("/", "\\"))
+    spRequest(filename)
+    return changed
+
 #==================================================================#
 #  
 #==================================================================#
@@ -2613,7 +2657,6 @@ def get_message(msg):
         loadRequest(fileops.storypath(vars.loadselect))
     elif(msg['cmd'] == 'sprequest'):
         spRequest(vars.spselect)
-        emit('from_server', {'cmd': 'spstatitems', 'data': {vars.spfilename: vars.spmeta} if vars.allowsp and len(vars.spfilename) else {}}, broadcast=True)
     elif(msg['cmd'] == 'deletestory'):
         deletesave(msg['data'])
     elif(msg['cmd'] == 'renamestory'):
diff --git a/bridge.lua b/bridge.lua
index 796bc33f..ed0941c6 100644
--- a/bridge.lua
+++ b/bridge.lua
@@ -165,7 +165,7 @@ return function(_python, _bridged)
     ---@field num_outputs integer
     ---@field feedback string
     ---@field is_config_file_open boolean
-    local kobold = setmetatable({API_VERSION = 1.0}, metawrapper)
+    local kobold = setmetatable({API_VERSION = 1.1}, metawrapper)
     local KoboldLib_mt = setmetatable({}, metawrapper)
     local KoboldLib_getters = setmetatable({}, metawrapper)
     local KoboldLib_setters = setmetatable({}, metawrapper)
@@ -1050,11 +1050,34 @@ return function(_python, _bridged)
             return
         elseif not bridged.vars.gamestarted and v == "" then
             error("`KoboldLib.submission` must not be set to the empty string when the story is empty")
+            return
         end
         bridged.vars.submission = v
     end
 
 
+    --==========================================================================
+    -- Userscript API: Soft prompt
+    --==========================================================================
+
+    ---@param t KoboldLib
+    ---@return string?
+    function KoboldLib_getters.spfilename(t)
+        return bridged.get_spfilename()
+    end
+
+    ---@param t KoboldLib
+    ---@param v string?
+    function KoboldLib_setters.spfilename(t, v)
+        if v:find("/") or v:find("\\") then
+            error("Cannot set `KoboldLib.spfilename` to a string that contains slashes")
+        end
+        if bridged.set_spfilename(v) then
+            maybe_require_regeneration()
+        end
+    end
+
+
     --==========================================================================
     -- Userscript API: Model information
     --==========================================================================
diff --git a/fileops.py b/fileops.py
index cd269931..c303764e 100644
--- a/fileops.py
+++ b/fileops.py
@@ -122,7 +122,10 @@ def checksp(filename: str, model_dimension: int) -> Tuple[Union[zipfile.ZipFile,
             shape, fortran_order, dtype = np.lib.format._read_array_header(f, version)
             assert len(shape) == 2
     except:
-        z.close()
+        try:
+            z.close()
+        except UnboundLocalError:
+            pass
         return 1, None, None, None, None
     if dtype not in ('V2', np.float16, np.float32):
         z.close()
diff --git a/userscripts/api_documentation.html b/userscripts/api_documentation.html
index f504f821..86230366 100644
--- a/userscripts/api_documentation.html
+++ b/userscripts/api_documentation.html
@@ -56,6 +56,7 @@
 <li><a href="#kobold.num_outputs">kobold.num_outputs</a></li>
 <li><a href="#kobold.outputs">kobold.outputs</a></li>
 <li><a href="#kobold.settings">kobold.settings</a></li>
+<li><a href="#kobold.spfilename">kobold.spfilename</a></li>
 <li><a href="#kobold.story">kobold.story</a>
 <ul>
 <li></li>
@@ -172,6 +173,7 @@
 <li><code>kobold.num_outputs</code></li>
 <li><code>kobold.outputs</code></li>
 <li><code>kobold.settings</code></li>
+<li><code>kobold.spfilename</code></li>
 <li><code>kobold.story</code></li>
 <li><code>kobold.submission</code></li>
 <li><code>kobold.worldinfo</code></li>
@@ -394,6 +396,14 @@
 <li><code>kobold.settings.setwidepth</code> (World Info Depth)</li>
 <li><code>kobold.settings.setuseprompt</code> (Always Use Prompt)</li>
 </ul>
+<h1 id="kobold.spfilename">kobold.spfilename</h1>
+<p><em><strong>Readable from:</strong></em> anywhere<br>
+<em><strong>Writable from:</strong></em> anywhere</p>
+<pre class=" language-lua"><code class="prism  language-lua">field kobold<span class="token punctuation">.</span>spfilename<span class="token punctuation">:</span> string?
+</code></pre>
+<p>The name of the soft prompt file to use (as a string), including the file extension. If not using a soft prompt, this is <code>nil</code> instead.</p>
+<p>You can also set the soft prompt to use by setting this to a string or <code>nil</code>.</p>
+<p>Modifying this field from inside of a generation modifier triggers a regeneration, which means that the context is recomputed after modification and generation begins again with the new context and previously generated tokens. This incurs a small performance penalty and should not be performed in excess.</p>
 <h1 id="kobold.story">kobold.story</h1>
 <p><em><strong>Readable from:</strong></em> anywhere<br>
 <em><strong>Writable from:</strong></em> nowhere</p>
diff --git a/userscripts/api_documentation.md b/userscripts/api_documentation.md
index 1c37c644..fda69670 100644
--- a/userscripts/api_documentation.md
+++ b/userscripts/api_documentation.md
@@ -29,6 +29,7 @@ global kobold: KoboldLib
 * `kobold.num_outputs`
 * `kobold.outputs`
 * `kobold.settings`
+* `kobold.spfilename`
 * `kobold.story`
 * `kobold.submission`
 * `kobold.worldinfo`
@@ -372,6 +373,21 @@ Modifying certain fields from inside of a generation modifier triggers a regener
 * `kobold.settings.setwidepth` (World Info Depth)
 * `kobold.settings.setuseprompt` (Always Use Prompt)
 
+# kobold.spfilename
+
+***Readable from:*** anywhere
+***Writable from:*** anywhere
+
+```lua
+field kobold.spfilename: string?
+```
+
+The name of the soft prompt file to use (as a string), including the file extension. If not using a soft prompt, this is `nil` instead.
+
+You can also set the soft prompt to use by setting this to a string or `nil`.
+
+Modifying this field from inside of a generation modifier triggers a regeneration, which means that the context is recomputed after modification and generation begins again with the new context and previously generated tokens. This incurs a small performance penalty and should not be performed in excess.
+
 # kobold.story
 
 ***Readable from:*** anywhere