diff --git a/src/ssgs/eleventy.js b/src/ssgs/eleventy.js
index 0d813dd..19c9f8a 100644
--- a/src/ssgs/eleventy.js
+++ b/src/ssgs/eleventy.js
@@ -72,6 +72,9 @@ export default class Eleventy extends Ssg {
 
 		if (path === '_data' || path.endsWith('/_data')) {
 			collectionConfig.disable_url = true;
+			collectionConfig.disable_add = true;
+			collectionConfig.disable_add_folder = true;
+			collectionConfig.disable_file_actions = true;
 		}
 
 		return collectionConfig;
diff --git a/src/ssgs/hugo.js b/src/ssgs/hugo.js
index 972f2e2..a38d91d 100644
--- a/src/ssgs/hugo.js
+++ b/src/ssgs/hugo.js
@@ -82,6 +82,9 @@ export default class Hugo extends Ssg {
 
 		if (path === dataPath || path.endsWith(`/${dataPath}`)) {
 			collectionConfig.disable_url = true;
+			collectionConfig.disable_add = true;
+			collectionConfig.disable_add_folder = true;
+			collectionConfig.disable_file_actions = true;
 		}
 
 		return collectionConfig;
diff --git a/src/ssgs/jekyll.js b/src/ssgs/jekyll.js
index b1dcec5..f8778e1 100644
--- a/src/ssgs/jekyll.js
+++ b/src/ssgs/jekyll.js
@@ -62,6 +62,31 @@ function toPostsKey(key) {
 	return key.replace('drafts', 'posts');
 }
 
+/**
+ * Generates posts _inputs configuration.
+ *
+ * @param collectionKey {string} The posts key.
+ * @returns {Record<string, import('@cloudcannon/configuration-types').Input>}
+ */
+function generatePostsInputs(collectionKey) {
+	return {
+		categories: {
+			type: 'multiselect',
+			options: {
+				values: `collections.${collectionKey}[*].categories`,
+				allow_create: true,
+			},
+		},
+		tags: {
+			type: 'multiselect',
+			options: {
+				values: `collections.${collectionKey}[*].tags`,
+				allow_create: true,
+			},
+		},
+	};
+}
+
 /**
  * Gets `collections` from Jekyll configuration in a standard format.
  *
@@ -137,7 +162,12 @@ export default class Jekyll extends Ssg {
 			key === 'drafts' ||
 			key.endsWith('_drafts');
 
-		if (key === 'data' || (!options.collection?.output && !isKnownOutputCollection)) {
+		if (key === 'data') {
+			collectionConfig.disable_url = true;
+			collectionConfig.disable_add = true;
+			collectionConfig.disable_add_folder = true;
+			collectionConfig.disable_file_actions = true;
+		} else if (!options.collection?.output && !isKnownOutputCollection) {
 			collectionConfig.disable_url = true;
 		}
 
@@ -150,15 +180,21 @@ export default class Jekyll extends Ssg {
 				path: '[relative_base_path]/{date|year}-{date|month}-{date|day}-{title|slugify}.[ext]',
 			};
 
+			collectionConfig._inputs = generatePostsInputs(key);
+
 			collectionConfig.add_options ||= [
 				{ name: `Add ${collectionConfig.singular_name || 'Post'}` },
 				{ name: 'Add Draft', collection: toDraftsKey(key) },
 			];
 		} else if (isDraftsPath(collectionConfig.path)) {
+			const postsKey = toPostsKey(key);
+
 			collectionConfig.create ||= {
 				path: '', // TODO: this should not be required if publish_to is set
-				publish_to: toPostsKey(key),
+				publish_to: postsKey,
 			};
+
+			collectionConfig._inputs = generatePostsInputs(postsKey);
 		}
 
 		return collectionConfig;
diff --git a/toolproof_tests/eleventy/base.toolproof.yml b/toolproof_tests/eleventy/base.toolproof.yml
index 4ac37e7..36730b5 100644
--- a/toolproof_tests/eleventy/base.toolproof.yml
+++ b/toolproof_tests/eleventy/base.toolproof.yml
@@ -28,7 +28,10 @@ steps:
       ╎        "path": "_data",
       ╎        "name": "Data",
       ╎        "icon": "data_usage",
-      ╎        "disable_url": true
+      ╎        "disable_url": true,
+      ╎        "disable_add": true,
+      ╎        "disable_add_folder": true,
+      ╎        "disable_file_actions": true
       ╎      }
       ╎    },
       ╎    "timezone": "Pacific/Auckland",
diff --git a/toolproof_tests/eleventy/subfolder-source.toolproof.yml b/toolproof_tests/eleventy/subfolder-source.toolproof.yml
index 91235e5..142c1a3 100644
--- a/toolproof_tests/eleventy/subfolder-source.toolproof.yml
+++ b/toolproof_tests/eleventy/subfolder-source.toolproof.yml
@@ -29,7 +29,10 @@ steps:
       ╎        "path": "_data",
       ╎        "name": "Data",
       ╎        "icon": "data_usage",
-      ╎        "disable_url": true
+      ╎        "disable_url": true,
+      ╎        "disable_add": true,
+      ╎        "disable_add_folder": true,
+      ╎        "disable_file_actions": true
       ╎      }
       ╎    },
       ╎    "timezone": "Pacific/Auckland",
diff --git a/toolproof_tests/eleventy/templates-in-source.toolproof.yml b/toolproof_tests/eleventy/templates-in-source.toolproof.yml
index 7266bc2..479beb0 100644
--- a/toolproof_tests/eleventy/templates-in-source.toolproof.yml
+++ b/toolproof_tests/eleventy/templates-in-source.toolproof.yml
@@ -33,7 +33,10 @@ steps:
       ╎        "path": "_data",
       ╎        "name": "Data",
       ╎        "icon": "data_usage",
-      ╎        "disable_url": true
+      ╎        "disable_url": true,
+      ╎        "disable_add": true,
+      ╎        "disable_add_folder": true,
+      ╎        "disable_file_actions": true
       ╎      }
       ╎    },
       ╎    "timezone": "Pacific/Auckland",
diff --git a/toolproof_tests/hugo/base.toolproof.yml b/toolproof_tests/hugo/base.toolproof.yml
index 3fd1a2d..7ea5a0c 100644
--- a/toolproof_tests/hugo/base.toolproof.yml
+++ b/toolproof_tests/hugo/base.toolproof.yml
@@ -35,7 +35,10 @@ steps:
       ╎        "glob": [
       ╎          "!_index.md"
       ╎        ],
-      ╎        "disable_url": true
+      ╎        "disable_url": true,
+      ╎        "disable_add": true,
+      ╎        "disable_add_folder": true,
+      ╎        "disable_file_actions": true
       ╎      }
       ╎    },
       ╎    "timezone": "Pacific/Auckland",
diff --git a/toolproof_tests/hugo/data-dir.toolproof.yml b/toolproof_tests/hugo/data-dir.toolproof.yml
index 7e3a866..f9099ab 100644
--- a/toolproof_tests/hugo/data-dir.toolproof.yml
+++ b/toolproof_tests/hugo/data-dir.toolproof.yml
@@ -37,7 +37,10 @@ steps:
       ╎        "glob": [
       ╎          "!_index.md"
       ╎        ],
-      ╎        "disable_url": true
+      ╎        "disable_url": true,
+      ╎        "disable_add": true,
+      ╎        "disable_add_folder": true,
+      ╎        "disable_file_actions": true
       ╎      }
       ╎    },
       ╎    "timezone": "Pacific/Auckland",
diff --git a/toolproof_tests/hugo/data-only.toolproof.yml b/toolproof_tests/hugo/data-only.toolproof.yml
index 9dd2bb3..e1aa318 100644
--- a/toolproof_tests/hugo/data-only.toolproof.yml
+++ b/toolproof_tests/hugo/data-only.toolproof.yml
@@ -18,7 +18,10 @@ steps:
       ╎        "glob": [
       ╎          "!_index.md"
       ╎        ],
-      ╎        "disable_url": true
+      ╎        "disable_url": true,
+      ╎        "disable_add": true,
+      ╎        "disable_add_folder": true,
+      ╎        "disable_file_actions": true
       ╎      }
       ╎    },
       ╎    "timezone": "Pacific/Auckland",
diff --git a/toolproof_tests/hugo/example-site-only.toolproof.yml b/toolproof_tests/hugo/example-site-only.toolproof.yml
index 732118e..10f1e8d 100644
--- a/toolproof_tests/hugo/example-site-only.toolproof.yml
+++ b/toolproof_tests/hugo/example-site-only.toolproof.yml
@@ -34,7 +34,10 @@ steps:
       ╎        "glob": [
       ╎          "!_index.md"
       ╎        ],
-      ╎        "disable_url": true
+      ╎        "disable_url": true,
+      ╎        "disable_add": true,
+      ╎        "disable_add_folder": true,
+      ╎        "disable_file_actions": true
       ╎      }
       ╎    },
       ╎    "timezone": "Pacific/Auckland",
diff --git a/toolproof_tests/hugo/subfolder-source.toolproof.yml b/toolproof_tests/hugo/subfolder-source.toolproof.yml
index 16e5479..64632c5 100644
--- a/toolproof_tests/hugo/subfolder-source.toolproof.yml
+++ b/toolproof_tests/hugo/subfolder-source.toolproof.yml
@@ -37,7 +37,10 @@ steps:
       ╎        "glob": [
       ╎          "!_index.md"
       ╎        ],
-      ╎        "disable_url": true
+      ╎        "disable_url": true,
+      ╎        "disable_add": true,
+      ╎        "disable_add_folder": true,
+      ╎        "disable_file_actions": true
       ╎      }
       ╎    },
       ╎    "timezone": "Pacific/Auckland",
diff --git a/toolproof_tests/jekyll/base.toolproof.yml b/toolproof_tests/jekyll/base.toolproof.yml
index e81b8fa..7466c21 100644
--- a/toolproof_tests/jekyll/base.toolproof.yml
+++ b/toolproof_tests/jekyll/base.toolproof.yml
@@ -90,6 +90,22 @@ steps:
       ╎        "create": {
       ╎          "path": "",
       ╎          "publish_to": "posts"
+      ╎        },
+      ╎        "_inputs": {
+      ╎          "categories": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.posts[*].categories",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          },
+      ╎          "tags": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.posts[*].tags",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          }
       ╎        }
       ╎      },
       ╎      "news_drafts": {
@@ -99,6 +115,22 @@ steps:
       ╎        "create": {
       ╎          "path": "",
       ╎          "publish_to": "news_posts"
+      ╎        },
+      ╎        "_inputs": {
+      ╎          "categories": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.news_posts[*].categories",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          },
+      ╎          "tags": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.news_posts[*].tags",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          }
       ╎        }
       ╎      },
       ╎      "news_posts": {
@@ -108,6 +140,22 @@ steps:
       ╎        "create": {
       ╎          "path": "[relative_base_path]/{date|year}-{date|month}-{date|day}-{title|slugify}.[ext]"
       ╎        },
+      ╎        "_inputs": {
+      ╎          "categories": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.news_posts[*].categories",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          },
+      ╎          "tags": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.news_posts[*].tags",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          }
+      ╎        },
       ╎        "add_options": [
       ╎          {
       ╎            "name": "Add Post"
@@ -125,6 +173,22 @@ steps:
       ╎        "create": {
       ╎          "path": "[relative_base_path]/{date|year}-{date|month}-{date|day}-{title|slugify}.[ext]"
       ╎        },
+      ╎        "_inputs": {
+      ╎          "categories": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.posts[*].categories",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          },
+      ╎          "tags": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.posts[*].tags",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          }
+      ╎        },
       ╎        "add_options": [
       ╎          {
       ╎            "name": "Add Post"
@@ -145,7 +209,10 @@ steps:
       ╎        "path": "_data",
       ╎        "name": "Data",
       ╎        "icon": "data_usage",
-      ╎        "disable_url": true
+      ╎        "disable_url": true,
+      ╎        "disable_add": true,
+      ╎        "disable_add_folder": true,
+      ╎        "disable_file_actions": true
       ╎      },
       ╎      "data_animals": {
       ╎        "path": "_data/animals",
diff --git a/toolproof_tests/jekyll/default-collections.toolproof.yml b/toolproof_tests/jekyll/default-collections.toolproof.yml
index baf26e7..6b198c2 100644
--- a/toolproof_tests/jekyll/default-collections.toolproof.yml
+++ b/toolproof_tests/jekyll/default-collections.toolproof.yml
@@ -26,6 +26,22 @@ steps:
       ╎        "create": {
       ╎          "path": "",
       ╎          "publish_to": "posts"
+      ╎        },
+      ╎        "_inputs": {
+      ╎          "categories": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.posts[*].categories",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          },
+      ╎          "tags": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.posts[*].tags",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          }
       ╎        }
       ╎      },
       ╎      "news_drafts": {
@@ -35,6 +51,22 @@ steps:
       ╎        "create": {
       ╎          "path": "",
       ╎          "publish_to": "news_posts"
+      ╎        },
+      ╎        "_inputs": {
+      ╎          "categories": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.news_posts[*].categories",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          },
+      ╎          "tags": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.news_posts[*].tags",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          }
       ╎        }
       ╎      },
       ╎      "news_posts": {
@@ -44,6 +76,22 @@ steps:
       ╎        "create": {
       ╎          "path": "[relative_base_path]/{date|year}-{date|month}-{date|day}-{title|slugify}.[ext]"
       ╎        },
+      ╎        "_inputs": {
+      ╎          "categories": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.news_posts[*].categories",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          },
+      ╎          "tags": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.news_posts[*].tags",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          }
+      ╎        },
       ╎        "add_options": [
       ╎          {
       ╎            "name": "Add Post"
@@ -61,6 +109,22 @@ steps:
       ╎        "create": {
       ╎          "path": "[relative_base_path]/{date|year}-{date|month}-{date|day}-{title|slugify}.[ext]"
       ╎        },
+      ╎        "_inputs": {
+      ╎          "categories": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.posts[*].categories",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          },
+      ╎          "tags": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.posts[*].tags",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          }
+      ╎        },
       ╎        "add_options": [
       ╎          {
       ╎            "name": "Add Post"
@@ -75,7 +139,10 @@ steps:
       ╎        "path": "_data",
       ╎        "name": "Data",
       ╎        "icon": "data_usage",
-      ╎        "disable_url": true
+      ╎        "disable_url": true,
+      ╎        "disable_add": true,
+      ╎        "disable_add_folder": true,
+      ╎        "disable_file_actions": true
       ╎      },
       ╎      "data_animals": {
       ╎        "path": "_data/animals",
diff --git a/toolproof_tests/justice-eleventy-template.toolproof.yml b/toolproof_tests/justice-eleventy-template.toolproof.yml
index 1f3ee48..1f0e0ef 100644
--- a/toolproof_tests/justice-eleventy-template.toolproof.yml
+++ b/toolproof_tests/justice-eleventy-template.toolproof.yml
@@ -28,7 +28,10 @@ steps:
       ╎        "path": "_data",
       ╎        "name": "Data",
       ╎        "icon": "data_usage",
-      ╎        "disable_url": true
+      ╎        "disable_url": true,
+      ╎        "disable_add": true,
+      ╎        "disable_add_folder": true,
+      ╎        "disable_file_actions": true
       ╎      }
       ╎    },
       ╎    "timezone": "Pacific/Auckland",
diff --git a/toolproof_tests/vonge_jekyll.toolproof.yml b/toolproof_tests/vonge_jekyll.toolproof.yml
index 9e390a4..2a3200b 100644
--- a/toolproof_tests/vonge_jekyll.toolproof.yml
+++ b/toolproof_tests/vonge_jekyll.toolproof.yml
@@ -27,6 +27,22 @@ steps:
       ╎        "create": {
       ╎          "path": "",
       ╎          "publish_to": "posts"
+      ╎        },
+      ╎        "_inputs": {
+      ╎          "categories": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.posts[*].categories",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          },
+      ╎          "tags": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.posts[*].tags",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          }
       ╎        }
       ╎      },
       ╎      "posts": {
@@ -36,6 +52,22 @@ steps:
       ╎        "create": {
       ╎          "path": "[relative_base_path]/{date|year}-{date|month}-{date|day}-{title|slugify}.[ext]"
       ╎        },
+      ╎        "_inputs": {
+      ╎          "categories": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.posts[*].categories",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          },
+      ╎          "tags": {
+      ╎            "type": "multiselect",
+      ╎            "options": {
+      ╎              "values": "collections.posts[*].tags",
+      ╎              "allow_create": true
+      ╎            }
+      ╎          }
+      ╎        },
       ╎        "add_options": [
       ╎          {
       ╎            "name": "Add Post"
@@ -55,7 +87,10 @@ steps:
       ╎        "path": "_data",
       ╎        "name": "Data",
       ╎        "icon": "data_usage",
-      ╎        "disable_url": true
+      ╎        "disable_url": true,
+      ╎        "disable_add": true,
+      ╎        "disable_add_folder": true,
+      ╎        "disable_file_actions": true
       ╎      },
       ╎      "testimonials": {
       ╎        "path": "collections/_testimonials",