diff --git a/evaluator/flags/testkit-flags.json b/evaluator/flags/testkit-flags.json
index 268e905..38c9be5 100644
--- a/evaluator/flags/testkit-flags.json
+++ b/evaluator/flags/testkit-flags.json
@@ -474,6 +474,30 @@
           ["two", 50]
         ]
       }
+    },
+    "semver-v-prefix-flag": {
+      "state": "ENABLED",
+      "variants": { "match": "match", "no-match": "no-match" },
+      "defaultVariant": "no-match",
+      "targeting": {
+        "if": [{"sem_ver": [{"var": "version"}, "=", "v1.0.0"]}, "match", "no-match"]
+      }
+    },
+    "semver-partial-version-flag": {
+      "state": "ENABLED",
+      "variants": { "match": "match", "no-match": "no-match" },
+      "defaultVariant": "no-match",
+      "targeting": {
+        "if": [{"sem_ver": [{"var": "version"}, "^", "1"]}, "match", "no-match"]
+      }
+    },
+    "semver-build-metadata-flag": {
+      "state": "ENABLED",
+      "variants": { "match": "match", "no-match": "no-match" },
+      "defaultVariant": "no-match",
+      "targeting": {
+        "if": [{"sem_ver": [{"var": "version"}, "=", "1.0.0+build"]}, "match", "no-match"]
+      }
     }
   },
   "$evaluators": {
diff --git a/evaluator/gherkin/semver.feature b/evaluator/gherkin/semver.feature
index 0b215c7..6bb2c13 100644
--- a/evaluator/gherkin/semver.feature
+++ b/evaluator/gherkin/semver.feature
@@ -43,3 +43,42 @@ Feature: Evaluator semantic version operator
       | key                          | context_value |
       | semver-invalid-version-flag  | not-a-version |
       | semver-invalid-operator-flag | 1.0.0         |
+
+  @semver-edge-cases @semver-v-prefix
+  Scenario Outline: v-prefix handling
+    Given an evaluator
+    And a String-flag with key "semver-v-prefix-flag" and a fallback value "fallback"
+    And a context containing a key "version", with type "String" and with value "<version>"
+    When the flag was evaluated with details
+    Then the resolved details value should be "<value>"
+    Examples:
+      | version | value    |
+      | 1.0.0   | match    |
+      | v1.0.0  | match    |
+      | 2.0.0   | no-match |
+
+  @semver-edge-cases @semver-partial-version
+  Scenario Outline: partial version handling
+    Given an evaluator
+    And a String-flag with key "semver-partial-version-flag" and a fallback value "fallback"
+    And a context containing a key "version", with type "String" and with value "<version>"
+    When the flag was evaluated with details
+    Then the resolved details value should be "<value>"
+    Examples:
+      | version | value    |
+      | 1.5.0   | match    |
+      | 1.0.0   | match    |
+      | 2.0.0   | no-match |
+
+  @semver-edge-cases @semver-build-metadata
+  Scenario Outline: build metadata ignored in comparison
+    Given an evaluator
+    And a String-flag with key "semver-build-metadata-flag" and a fallback value "fallback"
+    And a context containing a key "version", with type "String" and with value "<version>"
+    When the flag was evaluated with details
+    Then the resolved details value should be "<value>"
+    Examples:
+      | version     | value    |
+      | 1.0.0       | match    |
+      | 1.0.0+other | match    |
+      | 2.0.0       | no-match |
diff --git a/flags/custom-ops.json b/flags/custom-ops.json
index 85f5f9a..84b1a94 100644
--- a/flags/custom-ops.json
+++ b/flags/custom-ops.json
@@ -299,6 +299,48 @@
           }
         ]
       }
+    },
+    "semver-v-prefix-flag": {
+      "state": "ENABLED",
+      "variants": {
+        "match": "match",
+        "no-match": "no-match"
+      },
+      "defaultVariant": "no-match",
+      "targeting": {
+        "if": [
+          {"sem_ver": [{"var": "version"}, "=", "v1.0.0"]},
+          "match", "no-match"
+        ]
+      }
+    },
+    "semver-partial-version-flag": {
+      "state": "ENABLED",
+      "variants": {
+        "match": "match",
+        "no-match": "no-match"
+      },
+      "defaultVariant": "no-match",
+      "targeting": {
+        "if": [
+          {"sem_ver": [{"var": "version"}, "^", "1"]},
+          "match", "no-match"
+        ]
+      }
+    },
+    "semver-build-metadata-flag": {
+      "state": "ENABLED",
+      "variants": {
+        "match": "match",
+        "no-match": "no-match"
+      },
+      "defaultVariant": "no-match",
+      "targeting": {
+        "if": [
+          {"sem_ver": [{"var": "version"}, "=", "1.0.0+build"]},
+          "match", "no-match"
+        ]
+      }
     }
   }
 }
diff --git a/gherkin/targeting.feature b/gherkin/targeting.feature
index 5dd7ae2..cd29f9d 100644
--- a/gherkin/targeting.feature
+++ b/gherkin/targeting.feature
@@ -240,6 +240,42 @@ Feature: Targeting rules
       | 3.1.0   | major |
       | 4.0.0   | none  |
 
+  @semver @semver-edge-cases @semver-v-prefix
+  Scenario Outline: sem_ver v-prefix handling
+    Given a String-flag with key "semver-v-prefix-flag" and a default value "fallback"
+    And a context containing a key "version", with type "String" and with value "<version>"
+    When the flag was evaluated with details
+    Then the resolved details value should be "<value>"
+    Examples:
+      | version | value    |
+      | 1.0.0   | match    |
+      | v1.0.0  | match    |
+      | 2.0.0   | no-match |
+
+  @semver @semver-edge-cases @semver-partial-version
+  Scenario Outline: sem_ver partial version handling
+    Given a String-flag with key "semver-partial-version-flag" and a default value "fallback"
+    And a context containing a key "version", with type "String" and with value "<version>"
+    When the flag was evaluated with details
+    Then the resolved details value should be "<value>"
+    Examples:
+      | version | value    |
+      | 1.5.0   | match    |
+      | 1.0.0   | match    |
+      | 2.0.0   | no-match |
+
+  @semver @semver-edge-cases @semver-build-metadata
+  Scenario Outline: sem_ver build metadata ignored
+    Given a String-flag with key "semver-build-metadata-flag" and a default value "fallback"
+    And a context containing a key "version", with type "String" and with value "<version>"
+    When the flag was evaluated with details
+    Then the resolved details value should be "<value>"
+    Examples:
+      | version       | value    |
+      | 1.0.0         | match    |
+      | 1.0.0+other   | match    |
+      | 2.0.0         | no-match |
+
   Scenario Outline: Time-based operations
     Given a Integer-flag with key "timestamp-flag" and a default value "0"
     And a context containing a key "time", with type "Integer" and with value "<time>"