diff --git a/README.md b/README.md
index 6142e6fc..946967d1 100644
--- a/README.md
+++ b/README.md
@@ -312,6 +312,12 @@ Both nodes support the same metadata fields:
 
 Both nodes will automatically save prompts to the database and link any generated images to the prompt.
 
+- **Save to library** (`save_to_library`, on by default; "Save to library" in the Focused, Split and Pair editors):
+  turn it off while iterating and PromptManager ignores that node's runs. The prompt is not saved, the run is not
+  counted and its images are not linked (a scan skips them too), while the node's output is unchanged. Workflows
+  saved before this switch existed load with it on. If any PromptManager node feeding a sampler's positive input
+  has it off, none of that run's images are linked, because the image cannot show which sampler produced it.
+
 ### 🖼️ Using the Output-Wide Gallery
 
 The comprehensive gallery system provides complete access to all your ComfyUI output:
diff --git a/prompt_manager.py b/prompt_manager.py
index 2dcf0031..b7bcdc1a 100644
--- a/prompt_manager.py
+++ b/prompt_manager.py
@@ -26,13 +26,13 @@ except ImportError:
     InputTypeDict = dict
 
 try:
-    from .prompt_manager_base import PromptManagerBase
+    from .prompt_manager_base import SAVE_TO_LIBRARY_INPUT, PromptManagerBase
 except ImportError:
     import os
     import sys
 
     sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
-    from prompt_manager_base import PromptManagerBase
+    from prompt_manager_base import SAVE_TO_LIBRARY_INPUT, PromptManagerBase
 
 
 class PromptManager(PromptManagerBase, ComfyNodeABC):
@@ -115,6 +115,7 @@ class PromptManager(PromptManagerBase, ComfyNodeABC):
                         )
                     },
                 ),
+                "save_to_library": SAVE_TO_LIBRARY_INPUT,
             },
             "hidden": {
                 # The queued graph and this node's id: used to tell the positive
@@ -152,6 +153,7 @@ class PromptManager(PromptManagerBase, ComfyNodeABC):
         append_text: str = "",
         prompt: Optional[Dict[str, Any]] = None,
         unique_id: Optional[str] = None,
+        save_to_library: bool = True,
     ) -> Tuple[Any]:
         """
         Encode the text prompt and save it to the database.
@@ -164,6 +166,7 @@ class PromptManager(PromptManagerBase, ComfyNodeABC):
             search_text: Text to search for in past prompts
             prepend_text: Text to prepend to the main prompt
             append_text: Text to append to the main prompt
+            save_to_library: Off: nothing is saved, counted or tracked (#90)
 
         Returns:
             Tuple containing the conditioning for the diffusion model and the final
@@ -205,7 +208,9 @@ class PromptManager(PromptManagerBase, ComfyNodeABC):
         # Save prompt to database and set execution context for gallery tracking
         prompt_id = None
         extended_tags = []
-        if storage_text and storage_text.strip():
+        if not save_to_library:
+            self._skip_not_saved(prompt, unique_id)
+        elif storage_text and storage_text.strip():
             self.logger.debug(f"Processing prompt text: {storage_text[:100]}...")
 
             # Add prepend/append info to tags if they exist
@@ -249,6 +254,11 @@ class PromptManager(PromptManagerBase, ComfyNodeABC):
         tokens = clip.tokenize(encoding_text)
         conditioning = clip.encode_from_tokens_scheduled(tokens)
 
+        self.logger.info(f"CLIP encoding completed, text: {repr(encoding_text)[:80]}")
+        result = (conditioning, encoding_text)
+        if not save_to_library:
+            return result  # #90: no metadata registration, no history text
+
         # Register with ComfyUI integration for standard metadata compatibility
         node_id = f"promptmanager_{int(time.time() * 1000)}"
         self.comfyui_integration.register_prompt(
@@ -262,9 +272,6 @@ class PromptManager(PromptManagerBase, ComfyNodeABC):
                 "append_text": append_text.strip() if append_text else None,
             },
         )
-
-        self.logger.info(f"CLIP encoding completed, text: {repr(encoding_text)[:80]}")
-        result = (conditioning, encoding_text)
         record_runtime_context(
             type(self).__name__, text, prepend_text, append_text, encoding_text
         )
diff --git a/prompt_manager_base.py b/prompt_manager_base.py
index 62977b1f..921e1e2a 100644
--- a/prompt_manager_base.py
+++ b/prompt_manager_base.py
@@ -23,7 +23,7 @@ try:
     from .utils.image_monitor import get_image_monitor
     from .utils.prompt_tracker import get_prompt_tracker
     from .utils.hashing import generate_prompt_hash
-    from .utils.prompt_graph import resolve_text, run_prompt_nodes
+    from .utils.prompt_graph import resolve_text, run_prompt_nodes, save_setting
     from .utils.run_keys import executing_run_id, prompt_node_key
     from .utils.usage_tracking import PENDING_FIRST_USE
     from .utils.cached_runs import (
@@ -42,7 +42,7 @@ except ImportError:
     from utils.image_monitor import get_image_monitor
     from utils.prompt_tracker import get_prompt_tracker
     from utils.hashing import generate_prompt_hash
-    from utils.prompt_graph import resolve_text, run_prompt_nodes
+    from utils.prompt_graph import resolve_text, run_prompt_nodes, save_setting
     from utils.run_keys import executing_run_id, prompt_node_key
     from utils.usage_tracking import PENDING_FIRST_USE
     from utils.cached_runs import (
@@ -54,6 +54,22 @@ except ImportError:
     )
 
 
+# The optional input every PromptManager node declares last (#90): declared
+# last so no widget value of a workflow saved before it shifts.
+SAVE_TO_LIBRARY_INPUT = (
+    "BOOLEAN",
+    {
+        "default": True,
+        "label_on": "save",
+        "label_off": "skip",
+        "tooltip": (
+            "Save this node's prompt to the library, count its runs and link its "
+            "images. Off: PromptManager ignores the run; the output is unchanged."
+        ),
+    },
+)
+
+
 class PromptManagerBase:
     """Mixin providing shared prompt management logic for ComfyUI nodes.
 
@@ -156,7 +172,9 @@ class PromptManagerBase:
         resolved = resolve_text(prompt_graph, node_id)
         return {
             "is_run_prompt": node_id in run_prompt_nodes(prompt_graph),
+            # The hook skips a switch it cannot read (#90): the node counts
             "seen_at_queue": resolved is not None
+            and save_setting(prompt_graph, node_id) is True
             and generate_prompt_hash(resolved) == generate_prompt_hash(text),
             "known": True,
         }
@@ -245,6 +263,24 @@ class PromptManagerBase:
             "run_id": executing_run_id(),
         }
 
+    def _skip_not_saved(self, prompt_graph: Any = None, unique_id: Any = None) -> None:
+        """``save_to_library`` is off: nothing is saved, counted or tracked (#90).
+
+        A literal off makes the node no run prompt (``utils.prompt_graph``), so
+        no image looks up its run key. A switch wired from a node the graph
+        cannot read keeps the node a run prompt: its run key is marked like an
+        empty editor's, so an earlier run's entry of that key never links this
+        run's images.
+        """
+        message = (
+            "Save to library is off for this node: its prompt is not saved, the "
+            "run is not counted and its images are not linked"
+        )
+        if isinstance(prompt_graph, dict) and unique_id is not None:
+            self._mark_untracked(prompt_graph, unique_id, message)
+        else:
+            self.logger.info(message)
+
     def _skip_empty_prompt(self, prompt_graph: Any, unique_id: Any) -> None:
         """The ``text`` editor is empty: save and track nothing (#342).
 
diff --git a/prompt_manager_pair.py b/prompt_manager_pair.py
index df62d633..d406e23e 100644
--- a/prompt_manager_pair.py
+++ b/prompt_manager_pair.py
@@ -22,7 +22,11 @@ try:
     )
     from .utils.hashing import generate_prompt_hash
     from .utils.pair_execution import record_pair_execution
-    from .utils.prompt_graph import intrinsic_pair_nodes, run_prompt_components
+    from .utils.prompt_graph import (
+        intrinsic_pair_nodes,
+        run_prompt_components,
+        save_setting,
+    )
     from .utils.prompt_pair_resolver import resolve_text_input
     from .utils.usage_tracking import (
         PENDING_FIRST_USE,
@@ -41,7 +45,11 @@ except ImportError:
     )
     from utils.hashing import generate_prompt_hash
     from utils.pair_execution import record_pair_execution
-    from utils.prompt_graph import intrinsic_pair_nodes, run_prompt_components
+    from utils.prompt_graph import (
+        intrinsic_pair_nodes,
+        run_prompt_components,
+        save_setting,
+    )
     from utils.prompt_pair_resolver import resolve_text_input
     from utils.usage_tracking import (
         PENDING_FIRST_USE,
@@ -90,8 +98,13 @@ class PromptManagerPair(PromptManagerFocused):
         prompt: Optional[Dict[str, Any]] = None,
         unique_id: Optional[str] = None,
         extra_pnginfo: Optional[Dict[str, Any]] = None,
+        save_to_library: bool = True,
     ) -> Tuple[Any, Any, str, str]:
-        """Encode both sides once; database and tracking failures never block CLIP."""
+        """Encode both sides once; database and tracking failures never block CLIP.
+
+        With ``save_to_library`` off nothing is saved, counted, tracked or
+        recorded (#90); the four outputs are the same.
+        """
         if clip is None:
             raise RuntimeError("ERROR: clip input is invalid: None")
         if not isinstance(text, str) or not isinstance(negative_text, str):
@@ -109,6 +122,10 @@ class PromptManagerPair(PromptManagerFocused):
         negative_conditioning = clip.encode_from_tokens_scheduled(
             clip.tokenize(negative_text)
         )
+        result = positive_conditioning, negative_conditioning, positive, negative_text
+        if not save_to_library:
+            self._skip_not_saved(prompt, unique_id)
+            return result
         record_pair_execution(
             extra_pnginfo,
             unique_id,
@@ -169,7 +186,6 @@ class PromptManagerPair(PromptManagerFocused):
             )
         except Exception as error:
             self.logger.warning(f"Could not register paired metadata: {error}")
-        result = positive_conditioning, negative_conditioning, positive, negative_text
         record_runtime_context(
             type(self).__name__,
             text,
@@ -219,6 +235,9 @@ class PromptManagerPair(PromptManagerFocused):
         resolved_negative = (
             resolve_text_input(prompt, node_id, "negative_text") if known else None
         )
+        if known and save_setting(prompt, node_id) is not True:
+            # The hook skips a switch it cannot read (#90): the node counts
+            resolved_positive = resolved_negative = None
         positive_seen = resolved_positive is not None and generate_prompt_hash(
             resolved_positive
         ) == generate_prompt_hash(text)
diff --git a/prompt_manager_text.py b/prompt_manager_text.py
index 6e316f98..c6e3f070 100644
--- a/prompt_manager_text.py
+++ b/prompt_manager_text.py
@@ -26,13 +26,13 @@ except ImportError:
     InputTypeDict = dict
 
 try:
-    from .prompt_manager_base import PromptManagerBase
+    from .prompt_manager_base import SAVE_TO_LIBRARY_INPUT, PromptManagerBase
 except ImportError:
     import os
     import sys
 
     sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
-    from prompt_manager_base import PromptManagerBase
+    from prompt_manager_base import SAVE_TO_LIBRARY_INPUT, PromptManagerBase
 
 
 class PromptManagerText(PromptManagerBase, ComfyNodeABC):
@@ -115,6 +115,7 @@ class PromptManagerText(PromptManagerBase, ComfyNodeABC):
                         ),
                     },
                 ),
+                "save_to_library": SAVE_TO_LIBRARY_INPUT,
             },
             "hidden": {
                 # The queued graph and this node's id: used to tell the positive
@@ -149,6 +150,7 @@ class PromptManagerText(PromptManagerBase, ComfyNodeABC):
         append_text: str = "",
         prompt: Optional[Dict[str, Any]] = None,
         unique_id: Optional[str] = None,
+        save_to_library: bool = True,
     ) -> Tuple[str]:
         """
         Process the text prompt and save it to the database.
@@ -160,6 +162,7 @@ class PromptManagerText(PromptManagerBase, ComfyNodeABC):
             search_text: Text to search for in past prompts
             prepend_text: Text to prepend to the main prompt
             append_text: Text to append to the main prompt
+            save_to_library: Off: nothing is saved, counted or tracked (#90)
 
         Returns:
             Tuple containing the final processed text string
@@ -184,7 +187,9 @@ class PromptManagerText(PromptManagerBase, ComfyNodeABC):
         # Save prompt to database and set execution context for gallery tracking
         prompt_id = None
         extended_tags = []
-        if storage_text and storage_text.strip():
+        if not save_to_library:
+            self._skip_not_saved(prompt, unique_id)
+        elif storage_text and storage_text.strip():
             self.logger.debug(f"Processing prompt text: {storage_text[:100]}...")
 
             # Add prepend/append info to tags if they exist
@@ -220,6 +225,11 @@ class PromptManagerText(PromptManagerBase, ComfyNodeABC):
         else:
             self._skip_empty_prompt(prompt, unique_id)
 
+        self.logger.debug(f"Text processing completed: {final_text[:100]}...")
+        result = (final_text,)
+        if not save_to_library:
+            return result  # #90: no metadata registration, no history text
+
         # Register with ComfyUI integration for standard metadata compatibility
         node_id = f"promptmanagertext_{int(time.time() * 1000)}"
         self.comfyui_integration.register_prompt(
@@ -233,9 +243,6 @@ class PromptManagerText(PromptManagerBase, ComfyNodeABC):
                 "append_text": append_text.strip() if append_text else None,
             },
         )
-
-        self.logger.debug(f"Text processing completed: {final_text[:100]}...")
-        result = (final_text,)
         record_runtime_context(
             type(self).__name__, text, prepend_text, append_text, final_text
         )
diff --git a/py/api/admin.py b/py/api/admin.py
index a96d07d2..e010e3fb 100644
--- a/py/api/admin.py
+++ b/py/api/admin.py
@@ -52,6 +52,7 @@ try:
         extract_generation_params,
         parse_page_json,
     )
+    from ...utils.prompt_graph import metadata_opted_out, side_opted_out
     from ...utils.prompt_pair_resolver import resolve_prompt_pair, sampler_less_prompt
     from ...utils.review_capture import reviewable
 except ImportError:
@@ -67,6 +68,7 @@ except ImportError:
         extract_generation_params,
         parse_page_json,
     )
+    from utils.prompt_graph import metadata_opted_out, side_opted_out
     from utils.prompt_pair_resolver import resolve_prompt_pair, sampler_less_prompt
     from utils.review_capture import reviewable
 
@@ -260,6 +262,11 @@ SCAN_DETAILS = {
     "failed": "Error: the prompt could not be stored",
     "error": "Error: the file could not be processed (see the server log)",
     "found": "Metadata found, but no prompt text to store",
+    "not_saved": "Skipped · its PromptManager node does not save to the library",
+    "not_saved_wired": (
+        "Skipped · its Save to library switch is wired from another node, so only "
+        "the run itself can link it"
+    ),
     None: "No prompt metadata in the file",
 }
 
@@ -1720,10 +1727,34 @@ class AdminRoutesMixin:
                 except (ValueError, TypeError):
                     # Preserve malformed metadata for conservative resolver rejection.
                     pass
+        if metadata_opted_out(canonical):
+            # Save to library was off for the run's prompt: no prompt, link,
+            # recorded-run fallback or Needs review item (#90)
+            return "not_saved"
+        if metadata_opted_out(canonical, unreadable=True):
+            # The switch is wired from a node the file cannot show: only the
+            # live run (the node saw the value) can link it, never a scan
+            return "not_saved_wired"
         if not canonical.get("prompt") and not canonical.get("parameters"):
             return self._link_recorded_run(media_file, canonical, detailed, history)
         _with_file_size(canonical, media_file)
         resolution = resolve_prompt_pair(canonical)
+        if resolution["state"] == "resolved" and side_opted_out(
+            canonical.get("prompt"), resolution["negative"]
+        ):
+            # Only the negative's node is off: store the positive alone (#90)
+            prompt_text = (
+                resolution["positive"]
+                .get("storage_text", resolution["positive"]["text"])
+                .strip()
+            )
+            status = self._store_scanned_prompt(media_file, canonical, prompt_text)
+            if not detailed or status not in SCAN_TITLED_DETAILS:
+                return status
+            return {
+                "status": status,
+                "title": self._scan_title(media_file, prompt_text),
+            }
         if blank_positive(resolution):
             # Only prepend/append text: no stored prompt can own it (#342)
             resolution = {**resolution, "state": "unresolved"}
diff --git a/tests/browser/classic-node.spec.mjs b/tests/browser/classic-node.spec.mjs
index bd627e22..0f6cdead 100644
--- a/tests/browser/classic-node.spec.mjs
+++ b/tests/browser/classic-node.spec.mjs
@@ -19,7 +19,7 @@ test.beforeEach(async ({page, browserName}) => {
         await import('/extensions/promptmanager/prompt_manager.js');
         class Node {
             constructor(){
-                this.widgets=['text','category','tags','search_text'].map(name=>({name,value:'',inputEl:document.createElement('textarea')}));
+                this.widgets=[...['text','category','tags','search_text'].map(name=>({name,value:'',inputEl:document.createElement('textarea')})),{name:'save_to_library',type:'toggle',value:true}];
                 this.widgets_values=[]; this.inputs=[];
             }
             addDOMWidget(name,type,element){document.body.append(element);return {element};}
@@ -36,6 +36,14 @@ test.afterEach(async ({page,browserName}) => {
     expect(page.classicErrors).toEqual([]);
 });
 
+test('Classic loads an older workflow with Save to library on and keeps a saved off (#90)',async({page})=>{
+    // A workflow saved before the switch held the search UI's slot ('') at the switch's index
+    const loaded=await page.evaluate(()=>{const widget=node.widgets.find(w=>w.name==='save_to_library');widget.value='';node.configure({});return widget.value;});
+    expect(loaded).toBe(true);
+    const off=await page.evaluate(()=>{const widget=node.widgets.find(w=>w.name==='save_to_library');widget.value=false;node.configure({});return [widget.value,node.serialize().widgets_values[4]];});
+    expect(off).toEqual([false,false]);
+});
+
 test('Classic keeps immediate selection, search query and metadata serialization',async({page})=>{
     await page.route('**/prompt_manager/search?**', route=>route.fulfill({json:{success:true,results:[{text:'A new portrait',category:'Portrait',tags:['film grain'],rating:5}]}}));
     await page.evaluate(()=>{node.widgets.find(w=>w.name==='search_text').value='tag:"film grain" portrait';});
diff --git a/tests/browser/focused-node.spec.mjs b/tests/browser/focused-node.spec.mjs
index 4f2026bb..6ab2818c 100644
--- a/tests/browser/focused-node.spec.mjs
+++ b/tests/browser/focused-node.spec.mjs
@@ -26,7 +26,7 @@ test.beforeEach(async({page,browserName})=>{
         window.fixtureApp={registerExtension(extension){this.extension=extension;},ui:{settings:new EventTarget()},graph:{setDirtyCanvas(){}},canvas:{}};
         await import('/extensions/promptmanager/prompt_manager.js');
         class Node {
-            constructor(){this.widgets=['text','category','tags','search_text'].map(name=>({name,type:'text',value:'',options:{},inputEl:document.createElement('textarea')}));this.inputs=[...['clip','prepend_text','append_text'].map(name=>({name,type:name==='clip'?'CLIP':'STRING',link:null})),...['text','category','tags','search_text'].map(name=>({name,type:'STRING',link:null,widget:{name}}))];this.properties={};this.size=[550,700];}
+            constructor(){this.widgets=[...['text','category','tags','search_text'].map(name=>({name,type:'text',value:'',options:{},inputEl:document.createElement('textarea')})),{name:'save_to_library',type:'toggle',value:true,options:{}}];this.inputs=[...['clip','prepend_text','append_text'].map(name=>({name,type:name==='clip'?'CLIP':'STRING',link:null})),...['text','category','tags','search_text'].map(name=>({name,type:'STRING',link:null,widget:{name}})),{name:'save_to_library',type:'BOOLEAN',link:null,widget:{name:'save_to_library'}}];this.properties={};this.size=[550,700];}
             findInputByType(type){const index=this.inputs.findIndex(input=>input.type===type&&input.link==null);return index<0?undefined:{index,slot:this.inputs[index]};}
             addWidget(type,name,value,callback,options){const widget={type,name,value,callback,options};this.widgets.push(widget);return widget;}
             addDOMWidget(name,type,element){const host=document.createElement('div');host.style.height='650px';host.className='fixture-dom-widget';host.append(element);document.body.append(host);return {element};}
@@ -41,6 +41,32 @@ test.beforeEach(async({page,browserName})=>{
 });
 test.afterEach(async({page,browserName})=>{await saveCoverage(page,browserName);expect(page.focusedErrors).toEqual([]);});
 
+test(`${variant} Save to library switch saves its value and loads older workflows on (#90)`, async ({page}) => {
+    const toggle=page.getByRole('checkbox',{name:'Save to library',exact:true});
+    await expect(toggle).toBeChecked();
+    expect(await page.evaluate(()=>node.widgets.map(widget=>widget.name))).toEqual(['text','category','tags','search_text','prepend_text','append_text','save_to_library']);
+    // The native switch is drawn in the toolbar only: the host keeps it hidden and zero-height, like the text fallbacks
+    expect(await page.evaluate(()=>{const widget=node.widgets.find(item=>item.name==='save_to_library');return {type:widget.type,hidden:widget.hidden,size:widget.computeSize()};})).toEqual({type:'hidden',hidden:true,size:[0,-4]});
+    expect(await page.evaluate(()=>node.widgets.find(item=>item.name==='text').computeSize())).toEqual([0,-4]);
+    await toggle.uncheck();
+    await expect(page.locator('.pm-focused > .pm-editor-status[role=status]')).toHaveText('Save to library is off: runs of this node are not added to the library.');
+    const saved=await page.evaluate(()=>node.serialize());
+    expect(saved.widgets_values[6]).toBe(false);
+    await page.evaluate(saved=>node.configure(saved),saved);
+    await expect(toggle).not.toBeChecked();
+    await page.getByLabel('Main prompt',{exact:true}).fill('Typed while off');
+    await expect(page.locator('.pm-focused > .pm-editor-status[role=status]')).toHaveText('Save to library is off: runs of this node are not added to the library.');
+    // A workflow saved before the switch held the editor's own slot ('') at its index
+    await page.evaluate(()=>node.configure({widgets_values:['Old text','','','','','',''],properties:{}}));
+    await expect(toggle).toBeChecked();
+    expect(await page.evaluate(()=>node.widgets.find(widget=>widget.name==='save_to_library').value)).toBe(true);
+    await toggle.check();
+    await page.getByLabel('Main prompt',{exact:true}).fill('Typed while on');
+    await expect(page.locator('.pm-focused > .pm-editor-status[role=status]')).toHaveText('Main prompt is saved when this node runs.');
+    await page.evaluate(()=>{node.inputs.find(input=>input.name==='save_to_library').link=9;node.onConnectionsChange?.();});
+    await expect(toggle).toBeDisabled();
+});
+
 test(`${variant} library autocompletes filters and searches without changing editor metadata`, async ({page}) => {
     const requests=[];
     await page.route('**/prompt_manager/categories',route=>route.fulfill({json:{success:true,categories:['Portrait']}}));
@@ -257,7 +283,7 @@ test(`${variant} restores workflow values and disclosures and protects connected
 test(`${variant} offers text as a link socket, keeps typed text while linked and through a reload (#343)`,async({page})=>{
     const sockets=()=>page.evaluate(()=>Object.fromEntries(node.inputs.map(input=>[input.name,input.widget?.name??null])));
     // The hidden text widget no longer owns the input, so the host draws it as a socket; the other widget inputs are unchanged.
-    expect(await sockets()).toEqual({clip:null,prepend_text:null,append_text:null,text:null,category:'category',tags:'tags',search_text:'search_text'});
+    expect(await sockets()).toEqual({clip:null,prepend_text:null,append_text:null,text:null,category:'category',tags:'tags',search_text:'search_text',save_to_library:'save_to_library'});
     expect(await page.evaluate(()=>node.findInputByType('STRING').slot.name)).toBe('text');
     expect(await page.evaluate(()=>node.findInputByType('CLIP').slot.name)).toBe('clip');
     const main=page.getByRole('textbox',{name:'Main prompt',exact:true});
diff --git a/tests/browser/pair-node.spec.mjs b/tests/browser/pair-node.spec.mjs
index 2d554a84..e1ccda8a 100644
--- a/tests/browser/pair-node.spec.mjs
+++ b/tests/browser/pair-node.spec.mjs
@@ -17,7 +17,7 @@ test.beforeEach(async({page,browserName})=>{
         window.fixtureApp={registerExtension(extension){this.extension=extension;},ui:{settings},graph:{_nodes:[],setDirtyCanvas(){}},canvas:{},graphToPrompt:async()=>({})};
         await import('/extensions/promptmanager/prompt_manager.js');
         class Node {
-            constructor(){this.id=1;this.type='PromptManagerPair';this.widgets=['text','negative_text','category','tags','search_text'].map(name=>({name,type:'text',value:'',options:{},inputEl:document.createElement('textarea')}));this.inputs=[...['clip','prepend_text','append_text'].map(name=>({name,type:name==='clip'?'CLIP':'STRING',link:null})),...['text','negative_text','category','tags','search_text'].map(name=>({name,type:'STRING',link:null,widget:{name}}))];this.properties={};this.size=[1100,700];}
+            constructor(){this.id=1;this.type='PromptManagerPair';this.widgets=[...['text','negative_text','category','tags','search_text'].map(name=>({name,type:'text',value:'',options:{},inputEl:document.createElement('textarea')})),{name:'save_to_library',type:'toggle',value:true,options:{}}];this.inputs=[...['clip','prepend_text','append_text'].map(name=>({name,type:name==='clip'?'CLIP':'STRING',link:null})),...['text','negative_text','category','tags','search_text'].map(name=>({name,type:'STRING',link:null,widget:{name}})),{name:'save_to_library',type:'BOOLEAN',link:null,widget:{name:'save_to_library'}}];this.properties={};this.size=[1100,700];}
             findInputByType(type){const index=this.inputs.findIndex(input=>input.type===type&&input.link==null);return index<0?undefined:{index,slot:this.inputs[index]};}
             addWidget(type,name,value,callback,options){const widget={type,name,value,callback,options};this.widgets.push(widget);return widget;}
             addDOMWidget(name,type,element){const host=document.createElement('div');host.style.cssText='height:700px;width:1100px;max-width:100%';host.className='fixture-dom-widget';host.append(element);document.body.append(host);return {element};}
@@ -34,6 +34,18 @@ test.afterEach(async({page,browserName})=>{await saveCoverage(page,browserName);
 async function selectPair(page){await page.getByRole('button',{name:'Recent',exact:true}).click();await page.locator('.pm-editor-result').click();}
 async function draft(page,positive='Draft positive',negative='Draft negative'){await page.getByRole('textbox',{name:'Positive prompt',exact:true}).fill(positive);await page.getByRole('textbox',{name:'Negative prompt',exact:true}).fill(negative);}
 
+test('paired editor Save to library switch keeps the widget order and loads older workflows on (#90)',async({page})=>{
+    await expect(page.locator('.pm-pair')).toBeVisible();
+    const toggle=page.getByRole('checkbox',{name:'Save to library',exact:true});
+    await expect(toggle).toBeChecked();
+    expect(await page.evaluate(()=>node.widgets.map(widget=>widget.name))).toEqual(['text','negative_text','category','tags','search_text','prepend_text','append_text','save_to_library']);
+    await toggle.uncheck();
+    expect(await page.evaluate(()=>node.serialize().widgets_values[7])).toBe(false);
+    await expect(page.locator('.pm-pair > .pm-editor-status[role=status]').last()).toHaveText('Save to library is off: runs of this node are not added to the library.');
+    await page.evaluate(()=>node.configure({widgets_values:['P','N','','','','','',''],properties:{}}));
+    await expect(toggle).toBeChecked();
+});
+
 test('paired editor previews both texts before explicitly replacing both',async({page})=>{
     await expect(page.locator('.pm-pair')).toBeVisible();
     await draft(page);
diff --git a/tests/comfyui/execution-text-link.spec.mjs b/tests/comfyui/execution-text-link.spec.mjs
index 20e60de6..813a0345 100644
--- a/tests/comfyui/execution-text-link.spec.mjs
+++ b/tests/comfyui/execution-text-link.spec.mjs
@@ -16,8 +16,8 @@ installHostHooks(test, ['PromptManager', 'PromptManagerText', 'PromptManagerFocu
 // `primitive`: a core string node the queue-time resolver follows. `legacy`: the frontend's virtual Primitive node,
 // whose value is queued as literal text. `preview`: PrimitiveString -> PreviewAny, the shape of the maintainer's
 // TextGenerate -> PreviewAny chain, whose text is only known when the node runs.
-function build(page, { kind, positive, negative, prefix }) {
-    return page.evaluate(async ({ kind, positive, negative, prefix }) => {
+function build(page, { kind, positive, negative, prefix, saveToLibrary }) {
+    return page.evaluate(async ({ kind, positive, negative, prefix, saveToLibrary }) => {
         const { app } = await import('/scripts/app.js');
         app.graph.clear();
         const add = (type, x, y) => { const node = LiteGraph.createNode(type); app.graph.add(node); node.pos = [x, y]; return node; };
@@ -28,6 +28,7 @@ function build(page, { kind, positive, negative, prefix }) {
         const set = (name, value) => { const widget = prompt.widgets.find(item => item.name === name); widget.value = value; if (widget.inputEl) widget.inputEl.value = value; };
         set('text', positive.typed);
         if (negative) set('negative_text', negative.typed);
+        if (saveToLibrary !== undefined) prompt.widgets.find(item => item.name === 'save_to_library').value = saveToLibrary;
         const drive = (name, side, y) => {
             if (!side.via) return;
             if (side.via === 'legacy') {
@@ -73,7 +74,7 @@ function build(page, { kind, positive, negative, prefix }) {
         await prompt._pmTextSerializerReady;
         const { output, workflow } = await app.graphToPrompt();
         return { output, workflow, promptNode: String(prompt.id) };
-    }, { kind, positive, negative, prefix });
+    }, { kind, positive, negative, prefix, saveToLibrary });
 }
 
 async function run(execution, page, testCase, built) {
@@ -195,6 +196,47 @@ for (const [label, linked, negativeVia] of [['positive', ['text'], 'primitive'],
     });
 }
 
+// #90: with Save to library off the run still produces its image, but PromptManager saves, counts and links nothing,
+// and the run's history records no prompt text for it.
+for (const kind of ['PromptManager', 'PromptManagerText', 'PromptManagerFocused', 'PromptManagerSplit', 'PromptManagerPair']) {
+    test(`${kind} with Save to library off saves, counts and links nothing (#90)`, async ({ execution, page }) => {
+        test.setTimeout(90000);
+        const text = unique(`Not saved ${kind}`);
+        const negative = kind === 'PromptManagerPair' ? { typed: unique('Not saved negative') } : undefined;
+        const prefix = `notsaved/${randomUUID()}`;
+        const { output, workflow, promptNode } = await build(page, { kind, positive: { typed: text }, negative, prefix, saveToLibrary: false });
+        expect(output[promptNode].inputs.save_to_library).toBe(false);
+        const id = randomUUID();
+        const response = await execution.request.post('/prompt', { data: { prompt: output, prompt_id: id, extra_data: { extra_pnginfo: { workflow } } } });
+        expect(response.ok(), await response.text()).toBe(true);
+        let item;
+        await expect.poll(async () => {
+            item = (await (await execution.request.get(`/history/${id}`)).json())[id];
+            return item?.status?.status_str ?? null;
+        }, { timeout: 20000 }).toBe('success');
+        let result;
+        await expect.poll(async () => {
+            result = await readExecutionRuns(execution.databasePath, id);
+            const run = result.rows[0];
+            return Boolean(run && result.captures[run.run_id]);
+        }, { timeout: 10000, message: 'the run reaches SQLite' }).toBe(true);
+        const run = result.rows[0];
+        for (const context of result.captures[run.run_id].contexts || []) {
+            expect(context.positive_prompt_id ?? null).toBeNull();
+            expect(context.pair_id ?? null).toBeNull();
+        }
+        expect((result.usage[run.run_id] || []).every(entry => entry.run_count === 0)).toBe(true);
+        const files = Object.values(item.outputs).flatMap(value => value.images || []).map(image => image.filename);
+        expect(files.length).toBeGreaterThan(0);
+        await scan(execution);
+        expect(Object.values(await linkedPrompts(execution, files))).toEqual(files.map(() => null));
+        for (const query of [text, negative?.typed].filter(Boolean)) {
+            const found = await (await execution.request.get(`/prompt_manager/search?text=${encodeURIComponent(query)}`)).json();
+            expect(found.results ?? [], query).toEqual([]);
+        }
+    });
+}
+
 // #347: a cached PromptManager node counts every job, as an executing one does. Jobs after the first change only
 // the sampler seed, so ComfyUI serves the PromptManager node (and its PreviewAny source) from its output cache.
 const COUNTS = `import json, sqlite3, sys, pathlib
diff --git a/tests/comfyui/text-link.spec.mjs b/tests/comfyui/text-link.spec.mjs
index 6bfaf01a..612d34b4 100644
--- a/tests/comfyui/text-link.spec.mjs
+++ b/tests/comfyui/text-link.spec.mjs
@@ -370,6 +370,7 @@ test('workflows saved before #343 load unchanged and their linked text keeps wor
         const nodes = Object.fromEntries(app.graph._nodes.map(node => [node.id, node]));
         const reloaded = app.graph.serialize();
         return {
+            saves: Object.fromEntries(Object.entries(output).filter(([, node]) => node.class_type.startsWith('PromptManager')).map(([id, node]) => [id, node.inputs.save_to_library])),
             values: Object.fromEntries(reloaded.nodes.map(node => [node.id, node.widgets_values])),
             links: Object.fromEntries(Object.entries(output).map(([id, node]) => [id, { text: node.inputs.text, negative_text: node.inputs.negative_text }])),
             widgetBound: Object.fromEntries(Object.values(nodes).filter(node => node.type.startsWith('PromptManager')).map(node => [node.id, node.inputs.filter(input => ['text', 'negative_text'].includes(input.name) && input.widget).map(input => input.name)])),
@@ -377,8 +378,16 @@ test('workflows saved before #343 load unchanged and their linked text keeps wor
     }, workflow);
     for (const node of workflow.nodes) {
         // Every saved widget value comes back as it was saved, except the typed text main lost under a link (null).
-        if (node.widgets_values?.[0] !== null) expect(result.values[node.id], `${node.type} ${node.id}`).toEqual(node.widgets_values);
+        // #90: the last saved value is the editor's own slot (''), where the Save to library switch is now: it loads on.
+        if (node.widgets_values?.[0] === null) continue;
+        if (!node.type.startsWith('PromptManager')) { expect(result.values[node.id], `${node.type} ${node.id}`).toEqual(node.widgets_values); continue; }
+        const saved = node.widgets_values.length - 1;
+        expect(result.values[node.id].slice(0, saved), `${node.type} ${node.id}`).toEqual(node.widgets_values.slice(0, saved));
+        expect(result.values[node.id][saved], `${node.type} ${node.id} save_to_library`).toBe(true);
     }
+    // Every PromptManager node of the old workflow queues with Save to library on.
+    for (const save of Object.values(result.saves)) expect(save).toBe(true);
+    expect(Object.keys(result.saves).length).toBeGreaterThan(0);
     expect(result.links).toMatchObject({
         1: { text: 'Saved PromptManager text' }, 2: { text: 'Saved PromptManagerText text' }, 3: { text: 'Saved PromptManagerFocused text' },
         4: { text: 'Saved PromptManagerSplit text' }, 5: { text: 'Saved PromptManagerPair text', negative_text: 'Saved pair negative' },
diff --git a/tests/js/save-to-library.test.js b/tests/js/save-to-library.test.js
new file mode 100644
index 00000000..7d64aa0e
--- /dev/null
+++ b/tests/js/save-to-library.test.js
@@ -0,0 +1,68 @@
+// #90: the node's save_to_library switch (web/js/save-to-library.js).
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const source = import('../../web/js/save-to-library.js');
+
+function classicNode(saved) {
+    const names = ['text', 'category', 'tags', 'search_text', 'prepend_text', 'append_text', 'save_to_library', 'prompt_manager_search_ui'];
+    const widgets = names.map(name => ({name, value: name === 'save_to_library' ? true : ''}));
+    const node = {widgets, widgets_values: saved ? [...saved] : undefined};
+    // What a host configure does: each saved value goes to the widget at its index.
+    (saved || []).forEach((value, index) => { if (widgets[index]) widgets[index].value = value; });
+    return node;
+}
+
+test('an older workflow stored the editor slot where the switch is now: it loads on', async () => {
+    const {normalizeSaveWidget, savesToLibrary} = await source;
+    const node = classicNode(['a cat', 'c', 't', '', '', '', '']);
+    assert.equal(node.widgets[6].value, '', 'the host put the old DOM slot value into the switch');
+    assert.equal(normalizeSaveWidget(node), true);
+    assert.equal(node.widgets[6].value, true);
+    assert.equal(node.widgets_values[6], true);
+    assert.equal(savesToLibrary(node), true);
+    assert.deepEqual(node.widgets_values.slice(0, 6), ['a cat', 'c', 't', '', '', ''], 'no earlier value moved');
+});
+
+test('null, undefined and missing slots load on; saved booleans are kept', async () => {
+    const {normalizeSaveWidget, savesToLibrary} = await source;
+    for (const value of [null, undefined, 0, 'false']) {
+        const node = classicNode(['a', '', '', '', '', '', value]);
+        normalizeSaveWidget(node);
+        assert.equal(savesToLibrary(node), true, String(value));
+    }
+    const short = classicNode(['a', '', '', '', '', '']);
+    assert.equal(normalizeSaveWidget(short), false);
+    assert.equal(savesToLibrary(short), true);
+    const off = classicNode(['a', '', '', '', '', '', false]);
+    assert.equal(normalizeSaveWidget(off), false);
+    assert.equal(savesToLibrary(off), false);
+});
+
+test('a node without the widget (an older backend) saves', async () => {
+    const {normalizeSaveWidget, savesToLibrary} = await source;
+    assert.equal(savesToLibrary({widgets: [{name: 'text', value: ''}]}), true);
+    assert.equal(normalizeSaveWidget({widgets: []}), false);
+    assert.equal(savesToLibrary(undefined), true);
+});
+
+test('the switch moves after the editor fallbacks so every frontend has one order', async () => {
+    const {placeSaveWidgetLast} = await source;
+    const widgets = ['text', 'category', 'tags', 'search_text', 'save_to_library', 'prepend_text', 'append_text'].map(name => ({name}));
+    const node = {widgets};
+    assert.equal(placeSaveWidgetLast(node), true);
+    assert.deepEqual(node.widgets.map(widget => widget.name), ['text', 'category', 'tags', 'search_text', 'prepend_text', 'append_text', 'save_to_library']);
+    assert.equal(placeSaveWidgetLast(node), false, 'already last');
+    assert.equal(placeSaveWidgetLast({widgets: [{name: 'text'}]}), false);
+});
+
+test('setting the switch updates the widget, its saved value and notifies the host', async () => {
+    const {setSaveToLibrary, savesToLibrary} = await source;
+    const calls = [];
+    const node = classicNode(['a', '', '', '', '', '', true]);
+    node.widgets[6].callback = value => calls.push(value);
+    setSaveToLibrary(node, false);
+    assert.equal(savesToLibrary(node), false);
+    assert.equal(node.widgets_values[6], false);
+    assert.deepEqual(calls, [false]);
+    setSaveToLibrary({widgets: []}, false);
+});
diff --git a/tests/test_cached_runs.py b/tests/test_cached_runs.py
index d6ea4954..b337b6a6 100644
--- a/tests/test_cached_runs.py
+++ b/tests/test_cached_runs.py
@@ -210,13 +210,24 @@ class JobCase(unittest.TestCase):
         node = self.node(kind)
         self.context = (self.context[0], index)
         clip = mock.Mock()
+        # The node receives its switch as the queued graph holds it (#90)
+        save = g[node_id]["inputs"].get("save_to_library", True)
         if kind == "PromptManagerText":
-            return node.process_text(text, prompt=g, unique_id=node_id)
+            return node.process_text(
+                text, prompt=g, unique_id=node_id, save_to_library=save
+            )
         if kind == "PromptManagerPair":
             return node.encode_prompt(
-                clip, text, negative_text=negative, prompt=g, unique_id=node_id
+                clip,
+                text,
+                negative_text=negative,
+                prompt=g,
+                unique_id=node_id,
+                save_to_library=save,
             )
-        return node.encode_prompt(clip, text, prompt=g, unique_id=node_id)
+        return node.encode_prompt(
+            clip, text, prompt=g, unique_id=node_id, save_to_library=save
+        )
 
     def cache(self, node_id, *results):
         """Store executed results (one per list index) as ComfyUI's cache entry."""
@@ -313,6 +324,35 @@ class TestCachedJobsCount(JobCase):
         self.job(g, cached=["pm"])
         self.assertEqual(self.db.search_prompts(), [])
 
+    def test_disabled_node_then_cached_jobs_counts_0(self):
+        # #90 x #347: a node with Save to library off records no receipt and is
+        # no run prompt, so its cached jobs replay nothing. The prompt exists
+        # (an enabled run saved it), so any replayed count would show.
+        for kind in (
+            "PromptManager",
+            "PromptManagerFocused",
+            "PromptManagerSplit",
+            "PromptManagerText",
+            "PromptManagerPair",
+        ):
+            with self.subTest(kind=kind):
+                text = f"{LLM} not saved by {kind}"
+                negative = "blurry" if kind == "PromptManagerPair" else ""
+                self.first(graph(kind, negative_text=negative), text, negative)
+                before = (self.count(text), self.pair_count(text, negative))
+
+                def off(seed):
+                    g = graph(kind, negative_text=negative, seed=seed)
+                    g["pm"]["inputs"]["save_to_library"] = False
+                    return g
+
+                self.first(off(1), text, negative)
+                self.job(off(2), cached=["pm"])
+                self.job(off(3), cached=["pm"])
+                after = (self.count(text), self.pair_count(text, negative))
+                self.assertEqual(before[0], 1)
+                self.assertEqual(after, before)
+
     def test_alternating_upstream_values_each_count_their_own_prompt(self):
         g = graph()
         self.first(g, text="value A")
diff --git a/tests/test_save_to_library.py b/tests/test_save_to_library.py
new file mode 100644
index 00000000..3d8bee47
--- /dev/null
+++ b/tests/test_save_to_library.py
@@ -0,0 +1,508 @@
+"""#90 item 3: a node's ``save_to_library`` switch.
+
+Off: PromptManager ignores the run completely (no prompt saved, no run count,
+no image link), while the node still returns its normal outputs. On (the
+default, and every workflow or image made before the switch existed): as before.
+"""
+
+import logging
+import os
+import sys
+import unittest
+from pathlib import Path
+from unittest import mock
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+try:
+    from tests.test_prompt_attribution import MonitorCase, NodeCase
+    from tests.test_execution_contexts import load_module
+except ImportError:  # discovered with tests/ as the top-level directory
+    from test_prompt_attribution import MonitorCase, NodeCase
+    from test_execution_contexts import load_module
+
+from prompt_manager import PromptManager, PromptManagerFocused, PromptManagerSplit
+from prompt_manager_pair import PromptManagerPair
+from prompt_manager_text import PromptManagerText
+from prompt_search_list import PromptSearchList
+from utils.hashing import generate_prompt_hash
+from utils.prompt_graph import (
+    intrinsic_pair_nodes,
+    positive_opt_outs,
+    run_prompt_components,
+    run_prompt_nodes,
+    save_setting,
+)
+from utils.run_keys import prompt_node_key
+from utils.usage_tracking import (
+    PendingFirstUse,
+    QueuedRuns,
+    handle_queued_prompt,
+    on_dequeue,
+    queued_pair_runs,
+    queued_prompt_runs,
+)
+
+POSITIVE = "a lighthouse at dusk"
+NEGATIVE = "blurry"
+NODE_CLASSES = (
+    PromptManager,
+    PromptManagerText,
+    PromptManagerFocused,
+    PromptManagerSplit,
+    PromptManagerPair,
+)
+
+
+def run_graph(save=None, kind="PromptManager", negative_save=None):
+    """A PromptManager positive feeding a KSampler; ``save`` None leaves it out."""
+    inputs = {"text": POSITIVE, "clip": ["4", 1]}
+    if save is not None:
+        inputs["save_to_library"] = save
+    negative_inputs = {"text": NEGATIVE, "clip": ["4", 1]}
+    if negative_save is not None:
+        negative_inputs["save_to_library"] = negative_save
+    return {
+        "1": {"class_type": kind, "inputs": inputs},
+        "2": {"class_type": "PromptManager", "inputs": negative_inputs},
+        "4": {"class_type": "CheckpointLoaderSimple", "inputs": {"ckpt_name": "m"}},
+        "3": {
+            "class_type": "KSampler",
+            "inputs": {
+                "model": ["4", 0],
+                "positive": ["1", 0],
+                "negative": ["2", 0],
+                "latent_image": ["6", 0],
+            },
+        },
+        "6": {"class_type": "EmptyLatentImage", "inputs": {"batch_size": 1}},
+    }
+
+
+def pair_graph(save=None):
+    inputs = {"text": POSITIVE, "negative_text": NEGATIVE, "clip": ["4", 1]}
+    if save is not None:
+        inputs["save_to_library"] = save
+    return {
+        "1": {"class_type": "PromptManagerPair", "inputs": inputs},
+        "4": {"class_type": "CheckpointLoaderSimple", "inputs": {"ckpt_name": "m"}},
+        "3": {
+            "class_type": "KSampler",
+            "inputs": {
+                "model": ["4", 0],
+                "positive": ["1", 0],
+                "negative": ["1", 1],
+                "latent_image": ["6", 0],
+            },
+        },
+        "6": {"class_type": "EmptyLatentImage", "inputs": {"batch_size": 1}},
+    }
+
+
+class TestInputDeclaration(unittest.TestCase):
+    def test_every_prompt_manager_node_declares_a_boolean_defaulting_on(self):
+        for cls in NODE_CLASSES:
+            optional = cls.INPUT_TYPES()["optional"]
+            kind, options = optional["save_to_library"]
+            self.assertEqual(kind, "BOOLEAN", cls.__name__)
+            self.assertIs(options["default"], True, cls.__name__)
+            # Declared last: no saved widget value of an older workflow shifts
+            self.assertEqual(list(optional)[-1], "save_to_library", cls.__name__)
+
+    def test_search_list_has_no_switch(self):
+        inputs = PromptSearchList.INPUT_TYPES()
+        self.assertNotIn("save_to_library", inputs.get("optional", {}))
+        self.assertNotIn("save_to_library", inputs.get("required", {}))
+
+
+class TestSaveSetting(unittest.TestCase):
+    def test_missing_input_is_on(self):
+        self.assertIs(save_setting(run_graph(), "1"), True)
+
+    def test_literals_follow_comfyui_boolean_coercion(self):
+        for value, expected in (
+            (True, True),
+            (False, False),
+            ("", False),
+            (0, False),
+            ({"__value__": False}, False),
+            ({"__value__": True}, True),
+        ):
+            with self.subTest(value=value):
+                self.assertIs(save_setting(run_graph(save=value), "1"), expected)
+
+    def test_link_to_primitive_boolean_is_read(self):
+        for value in (True, False):
+            graph = run_graph(save=["9", 0])
+            graph["9"] = {"class_type": "PrimitiveBoolean", "inputs": {"value": value}}
+            self.assertIs(save_setting(graph, "1"), value)
+
+    def test_link_to_an_unknown_node_is_not_knowable(self):
+        graph = run_graph(save=["9", 0])
+        graph["9"] = {"class_type": "SomeCustomSwitch", "inputs": {}}
+        self.assertIsNone(save_setting(graph, "1"))
+        self.assertIsNone(save_setting(run_graph(save=["missing", 0]), "1"))
+
+
+class TestGraphRoles(unittest.TestCase):
+    def test_opted_out_positive_is_not_a_run_prompt(self):
+        graph = run_graph(save=False)
+        self.assertEqual(run_prompt_nodes(graph), [])
+        self.assertEqual(run_prompt_components(graph), [])
+        self.assertEqual(positive_opt_outs(graph), ["1"])
+
+    def test_enabled_positive_is_unchanged(self):
+        for save in (None, True):
+            graph = run_graph(save=save)
+            self.assertEqual(run_prompt_nodes(graph), ["1"])
+            self.assertEqual(positive_opt_outs(graph), [])
+
+    def test_opted_out_negative_is_no_positive_opt_out(self):
+        graph = run_graph(negative_save=False)
+        self.assertEqual(run_prompt_nodes(graph), ["1"])
+        self.assertEqual(positive_opt_outs(graph), [])
+
+    def test_walk_stops_at_an_opted_out_node(self):
+        graph = run_graph(save=False)
+        graph["1"]["inputs"]["text"] = ["7", 0]
+        graph["7"] = {"class_type": "PromptManagerText", "inputs": {"text": "x"}}
+        self.assertEqual(run_prompt_nodes(graph), [])
+
+    def test_sampler_less_fallback_skips_opted_out_nodes(self):
+        graph = {
+            "1": {
+                "class_type": "PromptManagerText",
+                "inputs": {"text": "a", "save_to_library": False},
+            },
+            "2": {"class_type": "PromptManagerText", "inputs": {"text": "b"}},
+        }
+        self.assertEqual(run_prompt_nodes(graph), ["2"])
+        self.assertEqual(run_prompt_components(graph), [("2", "text")])
+        self.assertEqual(positive_opt_outs(graph), ["1"])
+
+    def test_opted_out_pair_is_not_an_intrinsic_pair(self):
+        self.assertEqual(intrinsic_pair_nodes(pair_graph()), ["1"])
+        self.assertEqual(intrinsic_pair_nodes(pair_graph(save=False)), [])
+
+
+class TestQueueHook(unittest.TestCase):
+    def test_opted_out_node_is_never_stashed(self):
+        self.assertEqual(queued_prompt_runs(run_graph(save=False)), [])
+        self.assertEqual(queued_pair_runs(pair_graph(save=False)), [])
+
+    def test_unknown_setting_is_left_to_the_node(self):
+        graph = run_graph(save=["9", 0])
+        graph["9"] = {"class_type": "SomeCustomSwitch", "inputs": {}}
+        self.assertEqual(queued_prompt_runs(graph), [])
+        pair = pair_graph(save=["9", 0])
+        pair["9"] = {"class_type": "SomeCustomSwitch", "inputs": {}}
+        self.assertEqual(queued_pair_runs(pair), [])
+
+    def test_primitive_boolean_on_still_counts(self):
+        graph = run_graph(save=["9", 0])
+        graph["9"] = {"class_type": "PrimitiveBoolean", "inputs": {"value": True}}
+        self.assertEqual(
+            queued_prompt_runs(graph), [(generate_prompt_hash(POSITIVE), POSITIVE)]
+        )
+
+    def test_dequeue_counts_nothing_for_a_cached_opted_out_node(self):
+        """A cached node never executes: only the queued graph can say it is off."""
+        db = mock.Mock()
+        db.get_prompt_by_hash.return_value = {"id": 5}
+        queued, pending = QueuedRuns(), PendingFirstUse()
+        request = {"prompt": run_graph(save=False), "prompt_id": "job-1"}
+        handle_queued_prompt(request, queued, pair_queued=QueuedRuns())
+        on_dequeue("job-1", queued, lambda: db, pending, pair_queued=QueuedRuns())
+        db.record_prompt_use.assert_not_called()
+        self.assertEqual(pending.consume(generate_prompt_hash(POSITIVE)), 0)
+
+
+class TestNodesSaveNothing(NodeCase):
+    def run_node(self, cls, graph, save):
+        node = self.node(cls)
+        node.record_pair = mock.Mock()
+        kwargs = {"prompt": graph, "unique_id": "1", "save_to_library": save}
+        if cls is PromptManagerText:
+            return node, node.process_text(POSITIVE, **kwargs)
+        if cls is PromptManagerPair:
+            return node, node.encode_prompt(
+                self.clip(), POSITIVE, negative_text=NEGATIVE, **kwargs
+            )
+        return node, node.encode_prompt(self.clip(), POSITIVE, **kwargs)
+
+    def test_off_saves_counts_and_tracks_nothing_but_returns_outputs(self):
+        for cls in NODE_CLASSES:
+            with self.subTest(node=cls.__name__):
+                graph = (
+                    pair_graph(save=False)
+                    if cls is PromptManagerPair
+                    else run_graph(save=False, kind=cls.__name__)
+                )
+                node, result = self.run_node(cls, graph, False)
+                self.assertEqual(self.count_rows("prompts"), 0)
+                self.assertEqual(self.count_rows("prompt_pairs"), 0)
+                self.assertEqual(self.tracker.keyed_snapshot(), {})
+                self.assertEqual(self.tracker._prompt_queue, [])
+                node.comfyui_integration.register_prompt.assert_not_called()
+                if cls is PromptManagerText:
+                    self.assertEqual(result, (POSITIVE,))
+                elif cls is PromptManagerPair:
+                    self.assertEqual(result[0], ("cond", POSITIVE))
+                    self.assertEqual(result[1], ("cond", NEGATIVE))
+                    self.assertEqual(result[2:], (POSITIVE, NEGATIVE))
+                else:
+                    self.assertEqual(result, (("cond", POSITIVE), POSITIVE))
+
+    def test_off_without_graph_context_still_saves_nothing(self):
+        node = self.node(PromptManager)
+        node.encode_prompt(self.clip(), POSITIVE, save_to_library=False)
+        self.assertEqual(self.count_rows("prompts"), 0)
+        self.assertEqual(self.tracker._prompt_queue, [])
+
+    def test_off_leaves_an_existing_prompt_uncounted(self):
+        prompt_id = self.save(POSITIVE)
+        self.run_node(PromptManager, run_graph(save=False), False)
+        row = self.db.get_prompt_by_id(prompt_id)
+        self.assertFalse(row.get("run_count") or 0)
+
+    def test_on_is_unchanged(self):
+        self.run_node(PromptManager, run_graph(save=True), True)
+        self.assertIsNotNone(self.db.get_prompt_by_hash(generate_prompt_hash(POSITIVE)))
+        self.assertIn(
+            prompt_node_key(run_graph(save=True), "1"), self.tracker.keyed_snapshot()
+        )
+
+    def test_unknown_setting_on_at_run_time_counts_at_execution(self):
+        """The hook could not read a wired switch, so the node counts its run."""
+        graph = run_graph(save=["9", 0])
+        graph["9"] = {"class_type": "SomeCustomSwitch", "inputs": {}}
+        prompt_id = self.save(POSITIVE)
+        self.run_node(PromptManager, graph, True)
+        self.assertEqual(self.db.get_prompt_by_id(prompt_id)["run_count"], 1)
+
+
+class TestWiredSwitchOffMarksItsRun(NodeCase):
+    """Review finding: a wired switch off at run time keeps the node a run prompt."""
+
+    def wired_graph(self):
+        graph = run_graph(save=["9", 0])
+        graph["9"] = {"class_type": "SomeCustomSwitch", "inputs": {}}
+        return graph
+
+    def test_an_earlier_entry_of_the_key_never_stands_in(self):
+        graph = self.wired_graph()
+        key = prompt_node_key(graph, "1")
+        node = self.node(PromptManager)
+        node.encode_prompt(
+            self.clip(), POSITIVE, prompt=graph, unique_id="1", save_to_library=True
+        )
+        node.encode_prompt(
+            self.clip(), POSITIVE, prompt=graph, unique_id="1", save_to_library=False
+        )
+        latest, _run, _count = self.tracker.keyed_snapshot()[key]
+        self.assertTrue(latest.get("placeholder"))
+
+    def test_literal_off_marks_nothing(self):
+        node = self.node(PromptManager)
+        node.encode_prompt(
+            self.clip(),
+            POSITIVE,
+            prompt=run_graph(save=False),
+            unique_id="1",
+            save_to_library=False,
+        )
+        self.assertEqual(self.tracker.keyed_snapshot(), {})
+
+
+class TestMonitorLeavesOptedOutFilesUnlinked(MonitorCase):
+    def test_existing_prompt_is_not_linked_from_metadata(self):
+        self.save(POSITIVE)
+        self.assertIsNone(self.process({"prompt": run_graph(save=False)}))
+
+    def test_find_prompt_reports_opted_out(self):
+        self.save(POSITIVE)
+        state, prompt = self.handler._find_prompt_from_metadata(
+            {"prompt": run_graph(save=False)}
+        )
+        self.assertEqual((state, prompt), ("opted_out", None))
+
+    def test_mixed_positive_settings_leave_the_file_unlinked(self):
+        self.save(POSITIVE)
+        graph = run_graph(save=True)
+        graph["8"] = {
+            "class_type": "PromptManager",
+            "inputs": {"text": "other", "save_to_library": False},
+        }
+        graph["5"] = {
+            "class_type": "KSampler",
+            "inputs": {
+                "model": ["4", 0],
+                "positive": ["8", 0],
+                "negative": ["2", 0],
+                "latent_image": ["6", 0],
+            },
+        }
+        self.assertIsNone(self.process({"prompt": graph}))
+
+    def test_workflow_only_metadata_with_switch_off_is_opted_out(self):
+        self.save(POSITIVE)
+        metadata = {
+            "text_encoder_nodes": [
+                {
+                    "type": "PromptManager",
+                    "inputs": [],
+                    "widgets_values": [POSITIVE, "", "", "", "", "", False],
+                }
+            ]
+        }
+        state, _prompt = self.handler._find_prompt_from_metadata(metadata)
+        self.assertEqual(state, "opted_out")
+
+    def test_workflow_only_ignores_muted_nodes_and_reads_subgraphs(self):
+        from utils.prompt_graph import metadata_opted_out
+
+        node = {
+            "type": "PromptManager",
+            "widgets_values": [POSITIVE, "", "", "", "", "", False],
+        }
+        self.assertFalse(
+            metadata_opted_out({"workflow": {"nodes": [{**node, "mode": 4}]}})
+        )
+        self.assertTrue(
+            metadata_opted_out(
+                {
+                    "workflow": {
+                        "nodes": [],
+                        "definitions": {"subgraphs": [{"nodes": [node]}]},
+                    }
+                }
+            )
+        )
+
+    def test_unknown_setting_is_left_to_the_run(self):
+        self.save(POSITIVE)
+        graph = run_graph(save=["9", 0])
+        graph["9"] = {"class_type": "SomeCustomSwitch", "inputs": {}}
+        state, _prompt = self.handler._find_prompt_from_metadata({"prompt": graph})
+        self.assertEqual(state, "unknown")
+
+    def test_enabled_positive_still_links(self):
+        prompt_id = self.save(POSITIVE)
+        self.assertEqual(self.process({"prompt": run_graph(save=True)}), prompt_id)
+
+
+class TestLinkKeepsOptedOutNegativeOut(MonitorCase):
+    def setUp(self):
+        super().setUp()
+        # The real link, not the recording stub of MonitorCase
+        del self.handler.link_image_to_prompt
+
+    def test_opted_out_negative_is_never_stored_as_a_pair(self):
+        prompt_id = self.save(POSITIVE)
+        metadata = {"prompt": run_graph(save=True, negative_save=False)}
+        self.handler.link_image_to_prompt(self.image, {"id": prompt_id}, metadata)
+        self.assertIsNone(self.db.get_prompt_by_hash(generate_prompt_hash(NEGATIVE)))
+        self.assertEqual(self.count_pairs(), 0)
+        linked = (
+            self.db.model.get_connection()
+            .execute("SELECT prompt_id FROM generated_images")
+            .fetchall()
+        )
+        self.assertEqual([row[0] for row in linked], [prompt_id])
+
+    def test_opted_out_positive_links_nothing(self):
+        prompt_id = self.save(POSITIVE)
+        metadata = {"prompt": run_graph(save=False)}
+        self.handler.link_image_to_prompt(self.image, {"id": prompt_id}, metadata)
+        count = (
+            self.db.model.get_connection()
+            .execute("SELECT COUNT(*) FROM generated_images")
+            .fetchone()[0]
+        )
+        self.assertEqual(count, 0)
+
+    def count_pairs(self):
+        conn = self.db.model.get_connection()
+        return conn.execute("SELECT COUNT(*) FROM prompt_pairs").fetchone()[0]
+
+
+class TestScanSkipsOptedOutFiles(NodeCase):
+    def setUp(self):
+        super().setUp()
+        from py.api import admin
+
+        self.mixin = admin.AdminRoutesMixin.__new__(admin.AdminRoutesMixin)
+        self.mixin.db = self.db
+        self.mixin.logger = logging.getLogger("test.save_to_library.scan")
+        self.file = Path(self.tmp.name) / "out.png"
+
+    def test_opted_out_file_stores_nothing(self):
+        status = self.mixin._ingest_scanned_file(
+            self.file, {"prompt": run_graph(save=False)}
+        )
+        self.assertEqual(status, "not_saved")
+        self.assertEqual(self.count_rows("prompts"), 0)
+        self.assertEqual(self.count_rows("generated_images"), 0)
+
+    def test_opted_out_file_is_never_queued_for_review(self):
+        ambiguous = []
+        graph = run_graph(save=False)
+        graph["5"] = dict(graph["3"])  # a second sampler: ambiguous otherwise
+        graph["5"]["inputs"] = {**graph["3"]["inputs"], "positive": ["2", 0]}
+        status = self.mixin._ingest_scanned_file(
+            self.file, {"prompt": graph}, ambiguous=ambiguous
+        )
+        self.assertEqual(status, "not_saved")
+        self.assertEqual(ambiguous, [])
+
+    def test_opted_out_negative_stores_the_positive_only(self):
+        status = self.mixin._ingest_scanned_file(
+            self.file, {"prompt": run_graph(save=True, negative_save=False)}
+        )
+        self.assertEqual(status, "added")
+        self.assertIsNotNone(self.db.get_prompt_by_hash(generate_prompt_hash(POSITIVE)))
+        self.assertIsNone(self.db.get_prompt_by_hash(generate_prompt_hash(NEGATIVE)))
+        self.assertEqual(self.count_rows("prompt_pairs"), 0)
+
+    def test_wired_switch_is_left_to_the_live_run(self):
+        graph = run_graph(save=["9", 0])
+        graph["9"] = {"class_type": "SomeCustomSwitch", "inputs": {}}
+        status = self.mixin._ingest_scanned_file(self.file, {"prompt": graph})
+        self.assertEqual(status, "not_saved_wired")
+        self.assertEqual(self.count_rows("prompts"), 0)
+
+    def test_status_has_a_scan_detail(self):
+        from py.api import admin
+
+        group, row, _line = admin._scan_outcome(self.file, [], "not_saved")
+        self.assertEqual(group, "no_metadata")
+        self.assertIn("does not save", row["detail"])
+
+
+class TestHistoryRecordsNoText(unittest.TestCase):
+    def setUp(self):
+        self.m = load_module("execution_context_graph")
+
+    def test_opted_out_role_has_no_sources_and_no_text(self):
+        recipe = self.m.project_contexts(run_graph(save=False), None).recipes[0]
+        self.assertEqual(recipe.positive.sources, ())
+        self.assertIsNone(recipe.positive.inferred)
+        self.assertEqual(recipe.positive.reason, "not_saved")
+        # The enabled negative is recorded as before
+        self.assertEqual(recipe.negative.inferred.raw.value, NEGATIVE)
+
+    def test_unknown_setting_records_no_text_either(self):
+        graph = run_graph(save=["9", 0])
+        graph["9"] = {"class_type": "SomeCustomSwitch", "inputs": {}}
+        recipe = self.m.project_contexts(graph, None).recipes[0]
+        self.assertIsNone(recipe.positive.inferred)
+        self.assertEqual(recipe.positive.reason, "not_saved")
+
+    def test_enabled_role_is_unchanged(self):
+        recipe = self.m.project_contexts(run_graph(save=True), None).recipes[0]
+        self.assertEqual(recipe.positive.inferred.raw.value, POSITIVE)
+        self.assertEqual(len(recipe.positive.sources), 1)
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/vendor/comfyui-config.test.mjs b/tests/vendor/comfyui-config.test.mjs
index 2cb9587c..bf5b1c0d 100644
--- a/tests/vendor/comfyui-config.test.mjs
+++ b/tests/vendor/comfyui-config.test.mjs
@@ -35,15 +35,16 @@ test('execution script discovers only the new matrix and preserves all 78 origin
     assert.match(executions, /\[nodes2-start\]/);
     // + the fresh-host library location case, + #342 image attribution, + #343 linked text,
     // + #332 image category routes on a generated output (image-attribution.spec.mjs, 2 projects),
-    // + #347 cached runtime-linked runs: five node kinds and eight one-renderer cases (execution-text-link.spec.mjs, 2 projects)
-    assert.match(executions, /Total: 118 tests in 5 files/);
+    // + #347 cached runtime-linked runs: five node kinds and eight one-renderer cases (execution-text-link.spec.mjs, 2 projects),
+    // + #90 Save to library off (five node types)
+    assert.match(executions, /Total: 128 tests in 5 files/);
     for (const project of ['classic-start', 'nodes2-start']) {
         const cases = executions.split('\n').filter(line => line.includes(`[${project}]`));
         assert.equal(cases.filter(line => line.includes('execution-history.spec.mjs')).length, 15);
         assert.equal(cases.filter(line => line.includes('execution-outputs.spec.mjs')).length, 8);
         assert.equal(cases.filter(line => line.includes('library-location.spec.mjs')).length, 1);
         assert.equal(cases.filter(line => line.includes('image-attribution.spec.mjs')).length, 3);
-        assert.equal(cases.filter(line => line.includes('execution-text-link.spec.mjs')).length, 32);
+        assert.equal(cases.filter(line => line.includes('execution-text-link.spec.mjs')).length, 37);
     }
     assert.doesNotMatch(executions, /prompt-manager.spec/);
 });
diff --git a/tools/vendor/frontend-coverage-baseline.json b/tools/vendor/frontend-coverage-baseline.json
index de6c2416..dd070d4b 100644
--- a/tools/vendor/frontend-coverage-baseline.json
+++ b/tools/vendor/frontend-coverage-baseline.json
@@ -107,6 +107,12 @@
     "functions": 98,
     "statements": 98
   },
+  "save-to-library.js": {
+    "lines": 98,
+    "branches": 98,
+    "functions": 98,
+    "statements": 98
+  },
   "scan-progress.js": {
     "lines": 98,
     "branches": 98,
diff --git a/utils/execution_context_capture.py b/utils/execution_context_capture.py
index 3a07985f..0fd22d24 100644
--- a/utils/execution_context_capture.py
+++ b/utils/execution_context_capture.py
@@ -11,6 +11,7 @@ import weakref
 
 from .execution_context_budget import ContextBudget, PayloadLease, SealedContext
 from .execution_context_graph import (
+    NOT_SAVED,
     GraphProjection,
     GraphRole,
     SourceRef,
@@ -325,6 +326,8 @@ class ContextCapture:
                     nonlocal ambiguous
                     if role.reason == "source-transformed":
                         return _unknown("unsupported")
+                    if role.reason == NOT_SAVED:
+                        return _unknown("unavailable")
                     if not role.sources:
                         return role.inferred or _unknown("unsupported")
                     values = [
diff --git a/utils/execution_context_graph.py b/utils/execution_context_graph.py
index 740cfe43..ee884a34 100644
--- a/utils/execution_context_graph.py
+++ b/utils/execution_context_graph.py
@@ -3,8 +3,13 @@
 import re
 from dataclasses import dataclass
 from .execution_contexts import PromptSnapshot, TextEvidence, text_size
+from .prompt_graph import save_setting
 from .prompt_pair_resolver import _DEFAULT_ADAPTERS
 
+# A role whose PromptManager source has save_to_library off, or wired from a
+# node the graph cannot read: no text is recorded for it (#90)
+NOT_SAVED = "not_saved"
+
 
 @dataclass(frozen=True)
 class SourceRef:
@@ -332,6 +337,11 @@ class _Projector:
             self.transformed = False
             # Only the capture-source-to-consumer path determines transforms.
             sources = self.discover_sources(value, "conditioning")
+            if any(
+                save_setting(self.graph, source.node_id) is not True
+                for source in sources
+            ):
+                return GraphRole((), None, NOT_SAVED)
             snapshot, _ = self.text(value, "conditioning")
             return GraphRole(
                 sources, snapshot, "source-transformed" if self.transformed else ""
diff --git a/utils/image_monitor.py b/utils/image_monitor.py
index 7c70d876..78cfcb10 100644
--- a/utils/image_monitor.py
+++ b/utils/image_monitor.py
@@ -37,7 +37,13 @@ from .hashing import generate_prompt_hash
 from .metadata_extractor import ComfyUIMetadataExtractor
 from .parallel import note_refusal, refused_at_shutdown
 from .logging_config import get_logger
-from .prompt_graph import resolve_text, run_prompt_nodes
+from .prompt_graph import (
+    metadata_opted_out,
+    resolve_text,
+    run_prompt_nodes,
+    save_setting,
+    side_opted_out,
+)
 from .prompt_pair_resolver import resolve_prompt_pair
 from .run_keys import image_run_keys
 from .usage_tracking import survive_switch
@@ -450,6 +456,12 @@ class ImageGenerationHandler(FileSystemEventHandler):
             # that produced this image, independent of node caching and of any
             # negative-prompt PromptManager nodes in the workflow.
             state, current_prompt = self._find_prompt_from_metadata(metadata)
+            if state == "opted_out":
+                self.logger.info(
+                    "Save to library is off for this run's prompt, skipping image: "
+                    f"{image_path}"
+                )
+                return
             if state == "foreign":
                 # Another workflow saved this image: it belongs to no prompt of
                 # ours, and must not consume a batch queue entry.
@@ -715,16 +727,27 @@ class ImageGenerationHandler(FileSystemEventHandler):
             ``("linked", prompt)`` with a context dict holding 'id' and 'text';
             ``("foreign", None)`` when the workflow has no positive PromptManager
             node, so the image belongs to no prompt of ours;
+            ``("opted_out", None)`` when a PromptManager node that would be the
+            run's prompt has its ``save_to_library`` switch off (#90): the image
+            is linked to no prompt, by no fallback;
             ``("unknown", None)`` when metadata can't decide (missing, a batch
             item whose text came from another node, or a lookup failure) and the
             caller's queue and tracker fallbacks apply.
         """
         if not metadata:
             return "unknown", None
+        if metadata_opted_out(metadata):
+            return "opted_out", None
+        graph = metadata.get("prompt")
+        if isinstance(graph, dict) and any(
+            save_setting(graph, node_id) is None for node_id in run_prompt_nodes(graph)
+        ):
+            # A switch wired from a node the graph cannot read: only the node's
+            # own run (it saw the real value) can link the image (#90)
+            return "unknown", None
 
         prompt_text = None
         resolution = resolve_prompt_pair(metadata)
-        graph = metadata.get("prompt")
         if resolution["state"] == "resolved" and isinstance(graph, dict):
             positive = resolution["positive"]
             path = positive["provenance"].get("path", [])
@@ -865,13 +888,23 @@ class ImageGenerationHandler(FileSystemEventHandler):
             metadata: Extracted metadata from the image file (workflow, parameters,
                 etc.)
         """
+        if metadata_opted_out(metadata):
+            # Reached from a run or history: the file's own graph says no (#90)
+            self.logger.info(
+                f"Save to library is off for {os.path.basename(image_path)}; "
+                "left unlinked"
+            )
+            return
         try:
             resolution = resolve_prompt_pair(metadata)
+            graph = metadata.get("prompt") if isinstance(metadata, dict) else None
+            # An opted-out negative is never stored: link the positive alone
+            pair_allowed = not side_opted_out(graph, resolution.get("negative"))
 
             def link():
                 # One write; run again on the moved library when a Move
                 # library switched while it waited (#249 S6b).
-                if resolution["state"] == "resolved":
+                if resolution["state"] == "resolved" and pair_allowed:
                     positive = resolution["positive"]
                     expected = self.db_manager.get_prompt_by_hash(
                         generate_prompt_hash(
diff --git a/utils/prompt_graph.py b/utils/prompt_graph.py
index fc1ee362..b21021af 100644
--- a/utils/prompt_graph.py
+++ b/utils/prompt_graph.py
@@ -21,6 +21,11 @@ PROMPT_MANAGER_TYPES = frozenset(
     }
 )
 
+# A node's switch (#90): False means PromptManager ignores that node's runs
+SAVE_INPUT = "save_to_library"
+# Core nodes whose output is a known boolean: (class_type) -> input holding it
+_BOOLEAN_SOURCES = {"PrimitiveBoolean": "value"}
+
 # Upper bound on nodes expanded per graph; queued and embedded graphs are untrusted
 MAX_VISITS = 500
 # Longest text resolve_text will build; StringConcatenate chains can double
@@ -59,6 +64,116 @@ def _inputs(node: Any) -> Dict[str, Any]:
     return inputs if isinstance(inputs, dict) else {}
 
 
+def _as_boolean(value: Any) -> bool:
+    """ComfyUI's coercion of a BOOLEAN input before the node runs."""
+    if isinstance(value, dict) and "__value__" in value:
+        value = value["__value__"]
+    return bool(value)
+
+
+def save_setting(graph: Any, node_id: Any) -> Optional[bool]:
+    """A PromptManager node's ``save_to_library`` as the node will receive it.
+
+    True when the input is missing (every workflow and image from before the
+    switch), the literal coerced like ComfyUI does, the value of a linked core
+    ``PrimitiveBoolean``, and None when the switch is wired from a node whose
+    output cannot be known from the graph.
+    """
+    node = graph.get(str(node_id)) if isinstance(graph, dict) else None
+    inputs = _inputs(node)
+    if SAVE_INPUT not in inputs:
+        return True
+    value = inputs[SAVE_INPUT]
+    if not _is_link(value):
+        return _as_boolean(value)
+    source = graph.get(str(value[0]))
+    if not isinstance(source, dict) or value[1] != 0:
+        return None
+    key = _BOOLEAN_SOURCES.get(str(source.get("class_type", "")))
+    source_inputs = _inputs(source)
+    if key is None or key not in source_inputs or _is_link(source_inputs[key]):
+        return None
+    return _as_boolean(source_inputs[key])
+
+
+def opted_out(graph: Any, node_id: Any) -> bool:
+    """Whether a PromptManager node's switch is off: PromptManager ignores it."""
+    return save_setting(graph, node_id) is False
+
+
+def side_opted_out(graph: Any, side: Any) -> bool:
+    """Whether a resolved side's path passes a PromptManager node that is off.
+
+    ``side`` is a resolver side (``positive`` or ``negative`` of a resolved
+    pair): its text must not be stored when any PromptManager node on its
+    provenance path has its switch off or wired from an unreadable node (#90).
+    """
+    if not isinstance(graph, dict) or not isinstance(side, dict):
+        return False
+    provenance = side.get("provenance")
+    path = provenance.get("path") if isinstance(provenance, dict) else None
+    for step in path if isinstance(path, list) else []:
+        node_id = step.get("node_id") if isinstance(step, dict) else None
+        node = graph.get(str(node_id)) if node_id is not None else None
+        if (
+            isinstance(node, dict)
+            and node.get("class_type") in PROMPT_MANAGER_TYPES
+            and save_setting(graph, node_id) is not True
+        ):
+            return True
+    return False
+
+
+def _workflow_node_opted_out(node: Any) -> bool:
+    """A saved-workflow PromptManager node whose widget values hold ``False``.
+
+    No other PromptManager widget holds a boolean, so the value is the switch.
+    """
+    if not isinstance(node, dict):
+        return False
+    if (node.get("type") or node.get("class_type")) not in PROMPT_MANAGER_TYPES:
+        return False
+    if node.get("mode") in (2, 4):
+        return False  # muted or bypassed: it did not run
+    values = node.get("widgets_values")
+    return isinstance(values, list) and any(value is False for value in values)
+
+
+def metadata_opted_out(metadata: Any, *, unreadable: bool = False) -> bool:
+    """Whether a file's metadata says its run's prompt does not save (#90).
+
+    The executed graph (``prompt``) decides when present: a node of
+    ``positive_opt_outs``, or with ``unreadable`` also a run prompt whose
+    switch is wired from a node the graph cannot read. Without one, the
+    saved workflow (``workflow`` nodes or the extractor's
+    ``text_encoder_nodes``) is opted out when a PromptManager node stores
+    ``False``.
+    """
+    if not isinstance(metadata, dict):
+        return False
+    graph = metadata.get("prompt")
+    if isinstance(graph, dict):
+        if positive_opt_outs(graph):
+            return True
+        return unreadable and any(
+            save_setting(graph, node_id) is None for node_id in run_prompt_nodes(graph)
+        )
+    workflow = metadata.get("workflow")
+    nodes = list(metadata.get("text_encoder_nodes") or [])
+    if isinstance(workflow, dict) and isinstance(workflow.get("nodes"), list):
+        nodes.extend(workflow["nodes"])
+        definitions = workflow.get("definitions")
+        subgraphs = (
+            definitions.get("subgraphs") if isinstance(definitions, dict) else None
+        )
+        for subgraph in subgraphs if isinstance(subgraphs, list) else []:
+            inner = subgraph.get("nodes") if isinstance(subgraph, dict) else None
+            nodes.extend(inner if isinstance(inner, list) else [])
+    # Without the executed graph the node's role is unknown: any opted-out
+    # PromptManager node opts the file out (never a guessed link).
+    return any(_workflow_node_opted_out(node) for node in nodes[:MAX_VISITS])
+
+
 def _positive_roots(graph: Dict[str, Any]) -> List[Any]:
     """Links into samplers' positive inputs (KSampler, CFGGuider, BasicGuider, ...).
 
@@ -100,11 +215,21 @@ def has_sampler(graph: Any) -> bool:
 
 
 def positive_prompt_components(graph: Any) -> List[Tuple[str, str]]:
-    """Node/input identities reaching actual sampler positive wires."""
+    """Node/input identities reaching actual sampler positive wires.
+
+    A node whose switch is off is not one, and nothing upstream of it is
+    followed (#90): see ``positive_opt_outs``.
+    """
+    return _walk_positive(graph)[0]
+
+
+def _walk_positive(graph: Any) -> Tuple[List[Tuple[str, str]], List[str]]:
+    """(components of enabled nodes, opted-out nodes) on sampler positive wires."""
     if not isinstance(graph, dict):
-        return []
+        return [], []
 
     found: List[Tuple[str, str]] = []
+    skipped: List[str] = []
     seen = set()
     stack = list(reversed(_positive_roots(graph)))
     while stack and len(seen) < MAX_VISITS:
@@ -117,6 +242,10 @@ def positive_prompt_components(graph: Any) -> List[Tuple[str, str]]:
         if not isinstance(node, dict):
             continue
         if node.get("class_type") in PROMPT_MANAGER_TYPES:
+            if opted_out(graph, node_id):
+                if node_id not in skipped:
+                    skipped.append(node_id)
+                continue
             field = "text"
             if node.get("class_type") == "PromptManagerPair":
                 field = {
@@ -132,7 +261,33 @@ def positive_prompt_components(graph: Any) -> List[Tuple[str, str]]:
                 found.append(identity)
             continue
         stack.extend(reversed(_upstream_links(_inputs(node))))
-    return found
+    return found, skipped
+
+
+def _sampler_less_nodes(graph: Dict[str, Any]) -> List[str]:
+    """Every PromptManager node of a graph without a recognisable sampler."""
+    return [
+        str(node_id)
+        for node_id, node in graph.items()
+        if isinstance(node, dict) and node.get("class_type") in PROMPT_MANAGER_TYPES
+    ]
+
+
+def positive_opt_outs(graph: Any) -> List[str]:
+    """PromptManager nodes with their switch off that would be a run's prompt.
+
+    Those on a sampler's positive wires, or, in a graph without a recognisable
+    sampler, any. A run with one of them links no file to any prompt (#90):
+    the file's graph cannot always say which sampler wrote it.
+    """
+    if not isinstance(graph, dict):
+        return []
+    found, skipped = _walk_positive(graph)
+    if found or skipped or has_sampler(graph):
+        return skipped
+    return [
+        node_id for node_id in _sampler_less_nodes(graph) if opted_out(graph, node_id)
+    ]
 
 
 def positive_prompt_nodes(graph: Any) -> List[str]:
@@ -148,13 +303,13 @@ def positive_prompt_nodes(graph: Any) -> List[str]:
 
 def run_prompt_components(graph: Any) -> List[Tuple[str, str]]:
     """Actual positive components, retaining standalone main-editor fallback."""
-    components = positive_prompt_components(graph)
-    if components or not isinstance(graph, dict) or has_sampler(graph):
+    components, skipped = _walk_positive(graph)
+    if components or skipped or not isinstance(graph, dict) or has_sampler(graph):
         return components
     return [
-        (str(node_id), "text")
-        for node_id, node in graph.items()
-        if isinstance(node, dict) and node.get("class_type") in PROMPT_MANAGER_TYPES
+        (node_id, "text")
+        for node_id in _sampler_less_nodes(graph)
+        if not opted_out(graph, node_id)
     ]
 
 
@@ -165,16 +320,16 @@ def run_prompt_nodes(graph: Any) -> List[str]:
     say), every PromptManager node counts, as before 3.2.4, so an exotic workflow
     never silently loses usage counting or image linking. When a sampler exists
     and no PromptManager node feeds its positive input, nothing counts: the only
-    PromptManager nodes are negative prompts.
+    PromptManager nodes are negative prompts. A node whose switch is off never
+    counts (#90).
     """
-    positive = positive_prompt_nodes(graph)
-    if positive or not isinstance(graph, dict) or has_sampler(graph):
-        return positive
-    return [
-        str(node_id)
-        for node_id, node in graph.items()
-        if isinstance(node, dict) and node.get("class_type") in PROMPT_MANAGER_TYPES
-    ]
+    return list(
+        dict.fromkeys(
+            node_id
+            for node_id, field in run_prompt_components(graph)
+            if field == "text"
+        )
+    )
 
 
 def _join_text_inputs(
@@ -270,7 +425,18 @@ def resolve_text(graph: Any, node_id: str) -> Optional[str]:
 
 
 def intrinsic_pair_nodes(graph: Any) -> List[str]:
-    """Paired nodes whose matching outputs feed the same sampler, or standalone."""
+    """Paired nodes whose matching outputs feed the same sampler, or standalone.
+
+    A pair whose switch is off is never one (#90).
+    """
+    return [
+        node_id
+        for node_id in _intrinsic_pair_nodes(graph)
+        if not opted_out(graph, node_id)
+    ]
+
+
+def _intrinsic_pair_nodes(graph: Any) -> List[str]:
     if not isinstance(graph, dict) or len(graph) > MAX_VISITS:
         return []
     if not has_sampler(graph):
diff --git a/utils/usage_tracking.py b/utils/usage_tracking.py
index 6fb6d39c..761019da 100644
--- a/utils/usage_tracking.py
+++ b/utils/usage_tracking.py
@@ -30,7 +30,12 @@ from typing import Any, Callable, List, Optional, Tuple
 try:
     from .hashing import generate_prompt_hash
     from .logging_config import get_logger
-    from .prompt_graph import intrinsic_pair_nodes, resolve_text, run_prompt_components
+    from .prompt_graph import (
+        intrinsic_pair_nodes,
+        resolve_text,
+        run_prompt_components,
+        save_setting,
+    )
     from .prompt_pair_resolver import resolve_text_input
     from .pair_execution import clear_pair_execution
     from .queue_observers import subscribe_dequeue
@@ -41,6 +46,7 @@ except ImportError:
         intrinsic_pair_nodes,
         resolve_text,
         run_prompt_components,
+        save_setting,
     )
     from utils.prompt_pair_resolver import resolve_text_input
     from utils.pair_execution import clear_pair_execution
@@ -127,10 +133,14 @@ def queued_prompt_runs(graph: Any) -> List[Run]:
     """(hash, text) of each positive PromptManager node whose text is knowable.
 
     Each hash once: the same text in two positive nodes is one run of the prompt.
+    A node whose switch is off is never counted; one whose switch is wired from
+    a node the graph cannot read counts itself when it executes (#90).
     """
     runs: List[Run] = []
     seen = set()
     for node_id, field in run_prompt_components(graph):
+        if save_setting(graph, node_id) is not True:
+            continue
         node = graph.get(node_id, {}) if isinstance(graph, dict) else {}
         text = (
             resolve_text_input(graph, node_id, field)
@@ -156,6 +166,8 @@ def queued_pair_runs(graph: Any) -> List[Tuple[str, str, str]]:
     """Resolve raw paired recipes only when both outputs form the used pair."""
     found, seen = [], set()
     for node_id in intrinsic_pair_nodes(graph):
+        if save_setting(graph, node_id) is not True:
+            continue  # wired switch: the node counts itself (#90)
         positive = resolve_text_input(graph, node_id, "text")
         negative = resolve_text_input(graph, node_id, "negative_text")
         if positive is None or not positive.strip() or negative is None:
diff --git a/web/comfy/prompt_manager.js b/web/comfy/prompt_manager.js
index 51c1bdca..706c9d78 100644
--- a/web/comfy/prompt_manager.js
+++ b/web/comfy/prompt_manager.js
@@ -6,6 +6,7 @@ const { installClassicControls } = await import(api.fileURL('/prompt_manager/js/
 const { installFocusedNode, installSplitNode, installPairNode } = await import(api.fileURL('/prompt_manager/js/focused-node.js'));
 const { installPromptBridge } = await import(api.fileURL('/prompt_manager/js/prompt-bridge-host.js'));
 const { collapseLinkedWidget, isLinked, linkNoteText, primitiveTextValue, storedWidgetValue } = await import(api.fileURL('/prompt_manager/js/text-links.js'));
+const { normalizeSaveWidget } = await import(api.fileURL('/prompt_manager/js/save-to-library.js'));
 const promptManagerTypes = new Set(['PromptManager', 'PromptManagerText', 'PromptManagerFocused', 'PromptManagerSplit', 'PromptManagerPair']);
 
 // ============================================================================
@@ -525,6 +526,8 @@ app.registerExtension({
           if (originalConfigure) {
             originalConfigure.call(this, data);
           }
+          // #90: an older workflow loads with Save to library on
+          normalizeSaveWidget(this);
           if (data._userHasResized) {
             this._userHasResized = data._userHasResized;
           }
diff --git a/web/js/focused-node.js b/web/js/focused-node.js
index 55727284..f4aae5a1 100644
--- a/web/js/focused-node.js
+++ b/web/js/focused-node.js
@@ -2,9 +2,13 @@ import {createScope, createButton, createField, mountTheme} from './shared/toolk
 import {createPromptLibrary} from './prompt-library.js';
 import {attachMetadataAutocomplete} from './metadata-autocomplete.js';
 import {exposeTextSockets, linkNoteText, preferTextInputs, textInputAtPoint} from './text-links.js';
+import {SAVE_WIDGET, normalizeSaveWidget, placeSaveWidgetLast, saveWidget, savesToLibrary, setSaveToLibrary} from './save-to-library.js';
 
 const names = ['text', 'category', 'tags', 'search_text', 'prepend_text', 'append_text'];
 let nextEditorId = 0;
+// The editor draws these widgets itself; the host keeps them as hidden, zero-height values.
+function hiddenWidgetSize() { return [0, -4]; }
+function hideNativeWidget(widget) { widget.hidden = true; widget.type = 'hidden'; widget.computeSize = hiddenWidgetSize; }
 
 function loadStyles() {
     const href = new URL('./prompt-editor.css', import.meta.url).href;
@@ -43,10 +47,15 @@ export function installFocusedNode(nodeType, app, api, parseQuery, {layout = 'fo
         for (const name of pair ? [...names,'negative_text'] : names) {
             let widget = this.widgets?.find(item => item.name === name);
             if (!widget) widget = this.addWidget('text', name, '', () => {}, {});
-            widget.hidden = true; widget.type = 'hidden'; widget.computeSize = () => [0, -4];
+            hideNativeWidget(widget);
             widgets.set(name, widget);
         }
         exposeTextSockets(this, textInputs);
+        // #90: the switch follows the hidden fallbacks above (one widget order on every frontend) and is drawn in the
+        // toolbar, like the other hidden widgets are drawn by the editor.
+        placeSaveWidgetLast(this);
+        const nativeSave = saveWidget(this);
+        if (nativeSave) hideNativeWidget(nativeSave);
         const element = document.createElement('div'); element.className = `ca-tools pm-focused${split ? ' pm-split' : ''}${pair ? ' pm-pair' : ''}`;
         element.setAttribute('aria-label',pair ? 'Paired prompt editor' : split ? 'Split prompt editor' : 'Focused prompt editor');
         loadStyles(); mountTheme(element, app.ui?.settings, scope);
@@ -58,6 +67,11 @@ export function installFocusedNode(nodeType, app, api, parseQuery, {layout = 'fo
         toolbar.append(web);
         const save = pair ? createButton('Save pair','ca-primary') : null;
         if (save) toolbar.append(save);
+        const saveSwitch = document.createElement('input'); saveSwitch.type = 'checkbox'; saveSwitch.dataset.saveToLibrary = '';
+        const saveLabel = document.createElement('label'); saveLabel.className = 'pm-editor-save';
+        saveLabel.title = 'Off: runs of this node are not saved, counted or linked to their images. The output is unchanged.';
+        saveLabel.append(saveSwitch, document.createTextNode('Save to library'));
+        if (nativeSave) toolbar.append(saveLabel);
         let saving = false;
         const workspace = document.createElement('div'); workspace.className = 'pm-editor-workspace';
         const editor = document.createElement('div'); editor.className = 'pm-editor-compose';
@@ -138,7 +152,11 @@ export function installFocusedNode(nodeType, app, api, parseQuery, {layout = 'fo
         }
         const composed = disclosure('preview','Composed text preview');
         const preview = document.createElement('p'); preview.className = 'pm-editor-preview'; preview.dataset.composedPreview = ''; composed.append(preview);
-        const footer = document.createElement('p'); footer.className = 'pm-editor-status'; footer.setAttribute('role','status'); footer.textContent = pair ? 'The prompt pair is saved when this node runs, or use Save pair.' : 'Main prompt is saved when this node runs.';
+        const footer = document.createElement('p'); footer.className = 'pm-editor-status'; footer.setAttribute('role','status');
+        const SAVE_OFF = 'Save to library is off: runs of this node are not added to the library.';
+        const SAVE_LINKED = 'Save to library comes from a link: runs are added to the library only while it is on.';
+        function runNote(saved) { return isConnected(SAVE_WIDGET) ? SAVE_LINKED : savesToLibrary(thisNode) ? saved : SAVE_OFF; }
+        footer.textContent = runNote(pair ? 'The prompt pair is saved when this node runs, or use Save pair.' : 'Main prompt is saved when this node runs.');
         const saveConnectionNotice = pair ? document.createElement('p') : null;
         if (saveConnectionNotice) {
             saveConnectionNotice.className = 'pm-editor-status'; saveConnectionNotice.setAttribute('role','status');
@@ -166,6 +184,7 @@ export function installFocusedNode(nodeType, app, api, parseQuery, {layout = 'fo
             mainField.hidden = Boolean(isConnected('text')); connected.hidden = !isConnected('text');
             if (negative) { negative.field.hidden = Boolean(isConnected('negative_text')); negative.note.hidden = !isConnected('negative_text'); }
             if (save) { save.disabled = saving || hasConnectedPairValues(); saveConnectionNotice.hidden = !hasConnectedPairValues(); }
+            saveSwitch.checked = savesToLibrary(thisNode); saveSwitch.disabled = isConnected(SAVE_WIDGET);
             controls.forEach((input,name) => {
                 input.value = value(name);
                 if (name !== 'text' && name !== 'negative_text') {
@@ -185,7 +204,7 @@ export function installFocusedNode(nodeType, app, api, parseQuery, {layout = 'fo
                 write('category',prompt.category || '');
                 write('tags',Array.isArray(prompt.tags) ? prompt.tags.join(', ') : prompt.tags || '');
             }
-            render(); footer.setAttribute('role','status'); footer.textContent = pair ? 'Loaded pair. Saved when this node runs.' : 'Loaded prompt. Saved when this node runs.'; main.focus();
+            render(); footer.setAttribute('role','status'); footer.textContent = runNote(pair ? 'Loaded pair. Saved when this node runs.' : 'Loaded prompt. Saved when this node runs.'); main.focus();
         }});
         workspace.append(library.element); element.append(footer);
         function snapshot() {
@@ -197,7 +216,13 @@ export function installFocusedNode(nodeType, app, api, parseQuery, {layout = 'fo
             library.element.hidden = !split && !state.libraryOpen; browse.textContent = state.libraryOpen ? 'Hide library' : 'Browse library'; browse.setAttribute('aria-expanded', String(Boolean(state.libraryOpen)));
             library.setQuery(value('search_text')); library.restoreFilters(state.libraryFilters); render();
         }
-        controls.forEach((input,name) => scope.listen(input,'input',() => {write(name,input.value);render();footer.setAttribute('role','status');footer.textContent=pair?'The pair is saved when this node runs.':'Main prompt is saved when this node runs.';}));
+        controls.forEach((input,name) => scope.listen(input,'input',() => {write(name,input.value);render();footer.setAttribute('role','status');footer.textContent=runNote(pair?'The pair is saved when this node runs.':'Main prompt is saved when this node runs.');}));
+        scope.listen(saveSwitch,'change',() => {
+            if (isConnected(SAVE_WIDGET)) return;
+            setSaveToLibrary(thisNode, saveSwitch.checked); render();
+            footer.setAttribute('role','status'); footer.textContent = runNote(pair ? 'The pair is saved when this node runs.' : 'Main prompt is saved when this node runs.');
+            thisNode.setDirtyCanvas(true,true); app.graph?.setDirtyCanvas(true,true);
+        });
         scope.listen(browse,'click',() => {
             library.element.hidden = !library.element.hidden;
             library.closeCompletions();
@@ -248,6 +273,8 @@ export function installFocusedNode(nodeType, app, api, parseQuery, {layout = 'fo
         const result = configure?.apply(this,args);
         // A saved workflow restores its inputs with their widget bindings; keep the text inputs as sockets.
         exposeTextSockets(this, textInputs);
+        // #90: an older workflow loads with Save to library on
+        normalizeSaveWidget(this);
         this._focusedView?.restore();
         return result;
     };
diff --git a/web/js/prompt-editor.css b/web/js/prompt-editor.css
index ba6fbf4a..27c78330 100644
--- a/web/js/prompt-editor.css
+++ b/web/js/prompt-editor.css
@@ -2,6 +2,8 @@
 .pm-focused [hidden] { display: none !important; }
 .pm-editor-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
 .pm-editor-toolbar > strong { margin-inline-end: auto; font-weight: 500; }
+.pm-editor-save { display: inline-flex; align-items: center; gap: 6px; color: var(--ca-muted); cursor: pointer; }
+.pm-editor-save:has(input:checked) { color: inherit; }
 .pm-focused .ca-field-label { align-self: flex-start; margin-inline: 0; text-align: start; }
 .pm-editor-workspace, .pm-editor-compose { display: contents; }
 .pm-focused .pm-editor-main { display: flex; flex: 1; min-block-size: 180px; flex-direction: column; align-items: stretch; gap: 5px; text-align: start; }
diff --git a/web/js/save-to-library.js b/web/js/save-to-library.js
new file mode 100644
index 00000000..fdd39fe3
--- /dev/null
+++ b/web/js/save-to-library.js
@@ -0,0 +1,47 @@
+// #90: a PromptManager node's `save_to_library` switch. Off: PromptManager ignores the node's runs (nothing saved,
+// counted or linked); the node's output is unchanged.
+//
+// The input is declared last, so it takes the widget index an older workflow used for the editor's own
+// (non-serialized) DOM widget, where it stored `''` or nothing. ComfyUI coerces a BOOLEAN with `bool(value)`, so that
+// `''` would turn saving off: after a workflow loads, anything that is not a boolean is the default, on.
+
+export const SAVE_WIDGET = 'save_to_library';
+
+export function saveWidget(node) {
+    return node?.widgets?.find(widget => widget?.name === SAVE_WIDGET);
+}
+
+/** Whether the node saves its runs (a missing widget, as on an older backend, is on). */
+export function savesToLibrary(node) {
+    return saveWidget(node)?.value !== false;
+}
+
+/** Set a non-boolean switch value (from an older workflow) to on. Returns whether it changed. */
+export function normalizeSaveWidget(node) {
+    const widget = saveWidget(node);
+    if (!widget || typeof widget.value === 'boolean') return false;
+    widget.value = true;
+    const index = node.widgets.indexOf(widget);
+    if (Array.isArray(node.widgets_values) && index >= 0) node.widgets_values[index] = true;
+    return true;
+}
+
+/** Move the switch after every other widget the node has now, so its index is the same on every frontend. */
+export function placeSaveWidgetLast(node) {
+    const widget = saveWidget(node);
+    const widgets = node?.widgets;
+    if (!widget || widgets.at(-1) === widget) return false;
+    widgets.splice(widgets.indexOf(widget), 1);
+    widgets.push(widget);
+    return true;
+}
+
+/** Turn the switch on or off the way a native widget edit does. */
+export function setSaveToLibrary(node, value) {
+    const widget = saveWidget(node);
+    if (!widget) return;
+    widget.value = Boolean(value);
+    const index = node.widgets.indexOf(widget);
+    if (Array.isArray(node.widgets_values) && index >= 0) node.widgets_values[index] = widget.value;
+    widget.callback?.(widget.value, undefined, node);
+}