diff --git a/.tangled/workflow.schema.json b/.tangled/workflow.schema.json
--- a/.tangled/workflow.schema.json
+++ b/.tangled/workflow.schema.json
@@ -2,14 +2,14 @@
   "$schema": "http://json-schema.org/draft-07/schema#",
   "$id": "https://rssbase.io/schemas/tangled-workflow.schema.json",
   "title": "Tangled Spindle workflow",
-  "description": "Local JSON Schema for Tangled CI / Spindle workflow files under .tangled/workflows/*.yml. Based on https://docs.tangled.org/spindles.",
+  "description": "Local JSON Schema for Tangled CI / Spindle workflow files under .tangled/workflows/*.yml. Based on https://docs.tangled.org/spindles and Tangled's workflow parser.",
   "type": "object",
   "additionalProperties": false,
   "required": ["when", "engine"],
   "properties": {
     "when": {
       "title": "Trigger conditions",
-      "description": "Defines when the workflow runs. Each condition can match events, branches, and/or tags.",
+      "description": "Defines when the workflow runs. Each condition can match events, branches, tags, and optional changed-file path globs.",
       "type": "array",
       "minItems": 1,
       "items": { "$ref": "#/definitions/trigger" },
@@ -25,6 +25,12 @@
           "label": "tag push",
           "body": [
             { "event": ["push"], "tag": ["v*"] }
+          ]
+        },
+        {
+          "label": "path-filtered push",
+          "body": [
+            { "event": "push", "branch": "main", "paths": ["src/**", "package.json"] }
           ]
         }
       ]
@@ -56,12 +62,16 @@
           "description": "Recursively fetch git submodules. Default: false.",
           "type": "boolean",
           "default": false
+        },
+        "tags": {
+          "description": "Fetch Git tags during clone. Default depends on the Spindle runner.",
+          "type": "boolean"
         }
       },
       "defaultSnippets": [
         {
           "label": "default clone options",
-          "body": { "skip": false, "depth": 1, "submodules": false }
+          "body": { "skip": false, "depth": 1, "submodules": false, "tags": false }
         }
       ]
     },
@@ -244,7 +254,7 @@
           { "event": ["pull_request"], "branch": ["main"] }
         ],
         "engine": "nixery",
-        "clone": { "skip": false, "depth": 1, "submodules": false },
+        "clone": { "skip": false, "depth": 1, "submodules": false, "tags": false },
         "dependencies": {
           "nixpkgs": ["nodejs", "go"]
         },
@@ -262,29 +272,32 @@
       "required": ["event"],
       "properties": {
         "event": {
-          "description": "Events that can trigger this condition.",
-          "type": "array",
-          "minItems": 1,
-          "uniqueItems": true,
-          "items": {
-            "type": "string",
-            "enum": ["push", "pull_request", "manual"]
-          }
+          "description": "Events that can trigger this condition. Tangled accepts either a single string or a list.",
+          "$ref": "#/definitions/eventList"
         },
         "branch": {
-          "description": "Branch patterns. For push, matches pushed branches. For pull_request, matches target branches. No effect for manual. Supports * and ** globs.",
-          "$ref": "#/definitions/patternList"
+          "description": "Branch patterns. For push, matches pushed branches. For pull_request, matches target branches. No effect for manual. Supports * and ** globs. Tangled accepts either a single string or a list.",
+          "$ref": "#/definitions/stringOrPatternList"
         },
         "tag": {
-          "description": "Tag patterns for push events. No effect for pull_request or manual. Supports * and ** globs.",
-          "$ref": "#/definitions/patternList"
+          "description": "Tag patterns for push events. No effect for pull_request or manual. Supports * and ** globs. Tangled accepts either a single string or a list.",
+          "$ref": "#/definitions/stringOrPatternList"
+        },
+        "paths": {
+          "description": "Changed-file path globs. If set, the workflow only runs when at least one changed file matches one of these patterns. Supports * and ** globs. Tangled accepts either a single string or a list.",
+          "$ref": "#/definitions/stringOrPatternList"
         }
       },
       "allOf": [
         {
           "if": {
             "properties": {
-              "event": { "contains": { "const": "push" } }
+              "event": {
+                "anyOf": [
+                  { "const": "push" },
+                  { "type": "array", "contains": { "const": "push" } }
+                ]
+              }
             },
             "required": ["event"]
           },
@@ -294,12 +307,32 @@
               { "required": ["tag"] }
             ]
           }
+        },
+        {
+          "if": {
+            "properties": {
+              "event": {
+                "anyOf": [
+                  { "const": "pull_request" },
+                  { "type": "array", "contains": { "const": "pull_request" } }
+                ]
+              }
+            },
+            "required": ["event"]
+          },
+          "then": {
+            "required": ["branch"]
+          }
         }
       ],
       "defaultSnippets": [
         {
           "label": "push to main",
           "body": { "event": ["push"], "branch": ["main"] }
+        },
+        {
+          "label": "path-filtered push to main",
+          "body": { "event": "push", "branch": "main", "paths": ["src/**"] }
         },
         {
           "label": "pull request to main",
@@ -315,10 +348,33 @@
         }
       ]
     },
+    "eventList": {
+      "oneOf": [
+        {
+          "type": "string",
+          "enum": ["push", "pull_request", "manual"]
+        },
+        {
+          "type": "array",
+          "minItems": 1,
+          "uniqueItems": true,
+          "items": {
+            "type": "string",
+            "enum": ["push", "pull_request", "manual"]
+          }
+        }
+      ]
+    },
     "patternList": {
       "type": "array",
       "minItems": 1,
       "items": { "type": "string" }
+    },
+    "stringOrPatternList": {
+      "oneOf": [
+        { "type": "string" },
+        { "$ref": "#/definitions/patternList" }
+      ]
     },
     "environment": {
       "type": "object",
diff --git a/.tangled/workflows/build.yml b/.tangled/workflows/build.yml
--- a/.tangled/workflows/build.yml
+++ b/.tangled/workflows/build.yml
@@ -2,9 +2,13 @@
 
 when:
   - event: ["push", "manual"]
-    branch: ["main"]
-  - event: ["pull_request"]
-    branch: ["main"]
+    branch: main
+    paths:
+      - application/**
+  - event: pull_request
+    branch: main
+    paths:
+      - application/**
 
 engine: microvm
 image: nixos
diff --git a/.tangled/workflows/check.yml b/.tangled/workflows/check.yml
--- a/.tangled/workflows/check.yml
+++ b/.tangled/workflows/check.yml
@@ -2,9 +2,9 @@
 
 when:
   - event: ["push", "manual"]
-    branch: ["main"]
-  - event: ["pull_request"]
-    branch: ["main"]
+    branch: main
+  - event: pull_request
+    branch: main
 
 engine: microvm
 image: nixos