diff --git a/gcv_guard.nsc.rs b/gcv_guard.nsc.rs
new file mode 100644
index 0000000..61f3861
--- /dev/null
+++ b/gcv_guard.nsc.rs
@@ -0,0 +1,228 @@
+// =====================================================
+// PI NETWORK – NSC GCV GUARD
+// Anti Price Claim & Anti Scam Narrative Smart Contract
+// =====================================================
+//
+// ⚠️ This contract DOES NOT define price.
+// ⚠️ This contract DOES NOT enable trading.
+// ⚠️ This contract PROTECTS narrative integrity.
+//
+// Compatible with: Pi-style WASM / NSC architecture
+// =====================================================
+
+/// ------------------------------
+/// NETWORK EPOCH
+/// ------------------------------
+#[derive(Clone, PartialEq)]
+enum NetworkEpoch {
+    ENCLOSED,     // Enclosed Mainnet
+    TRANSITION,   // Transition Phase
+    OPEN          // Open Mainnet
+}
+
+/// ------------------------------
+/// CLAIM TYPE
+/// ------------------------------
+#[derive(Clone, PartialEq)]
+enum ClaimType {
+    PRICE_CLAIM,        // Klaim harga / nilai pasti
+    VALUE_REFERENCE,    // Referensi nilai non-market
+    EDUCATIONAL,        // Edukasi / diskusi
+    UNKNOWN
+}
+
+/// ------------------------------
+/// NETWORK STATE
+/// ------------------------------
+struct NetworkState {
+    epoch: NetworkEpoch,
+    allow_market_price: bool,
+}
+
+/// ------------------------------
+/// AUDIT LOG
+/// ------------------------------
+struct GuardLog {
+    timestamp: u64,
+    actor: String,
+    claim_type: ClaimType,
+    decision: String,
+}
+
+/// ------------------------------
+/// CORE CONTRACT
+/// ------------------------------
+struct GCVGuard {
+    state: NetworkState,
+    logs: Vec<GuardLog>,
+}
+
+impl GCVGuard {
+
+    /// INIT CONTRACT
+    fn init() -> Self {
+        GCVGuard {
+            state: NetworkState {
+                epoch: NetworkEpoch::ENCLOSED,
+                allow_market_price: false,
+            },
+            logs: Vec::new(),
+        }
+    }
+
+    /// --------------------------
+    /// CLAIM DETECTION ENGINE
+    /// --------------------------
+    fn detect_claim(&self, text: &String) -> ClaimType {
+
+        let lower = text.to_lowercase();
+
+        if lower.contains("harga resmi")
+            || lower.contains("official price")
+            || lower.contains("gcv =")
+            || lower.contains("jamin harga")
+            || lower.contains("guaranteed value")
+        {
+            return ClaimType::PRICE_CLAIM;
+        }
+
+        if lower.contains("konsensus")
+            || lower.contains("referensi nilai")
+            || lower.contains("nilai internal")
+        {
+            return ClaimType::VALUE_REFERENCE;
+        }
+
+        if lower.contains("edukasi")
+            || lower.contains("diskusi")
+            || lower.contains("pembahasan")
+        {
+            return ClaimType::EDUCATIONAL;
+        }
+
+        ClaimType::UNKNOWN
+    }
+
+    /// --------------------------
+    /// GCV USAGE POLICY
+    /// --------------------------
+    fn gcv_usage_guard(&self, use_case: &String) -> Result<(), String> {
+
+        let lower = use_case.to_lowercase();
+
+        if lower.contains("jual")
+            || lower.contains("beli")
+            || lower.contains("exchange")
+            || lower.contains("withdraw")
+            || lower.contains("transfer nilai")
+        {
+            return Err(
+                "GCV_VIOLATION: GCV cannot be used for financial transactions."
+                    .to_string()
+            );
+        }
+
+        Ok(())
+    }
+
+    /// --------------------------
+    /// ENFORCEMENT ENGINE
+    /// --------------------------
+    fn enforce(
+        &mut self,
+        actor: String,
+        content: String,
+        use_case: String,
+        timestamp: u64,
+    ) -> Result<String, String> {
+
+        let claim = self.detect_claim(&content);
+
+        // GCV misuse guard
+        if let Err(e) = self.gcv_usage_guard(&use_case) {
+            self.log(actor, claim.clone(), "BLOCKED".to_string(), timestamp);
+            return Err(e);
+        }
+
+        match self.state.epoch {
+
+            NetworkEpoch::ENCLOSED => {
+                if claim == ClaimType::PRICE_CLAIM {
+                    self.log(actor, claim, "BLOCKED".to_string(), timestamp);
+                    return Err(
+                        "BLOCKED: No price claims allowed in Enclosed Mainnet."
+                            .to_string()
+                    );
+                }
+            }
+
+            NetworkEpoch::TRANSITION => {
+                if claim == ClaimType::PRICE_CLAIM {
+                    self.log(actor, claim, "REJECTED".to_string(), timestamp);
+                    return Err(
+                        "REJECTED: No official Pi price during transition phase."
+                            .to_string()
+                    );
+                }
+            }
+
+            NetworkEpoch::OPEN => {
+                if !self.state.allow_market_price
+                    && claim == ClaimType::PRICE_CLAIM
+                {
+                    self.log(actor, claim, "DENIED".to_string(), timestamp);
+                    return Err(
+                        "DENIED: Market price not enabled by governance."
+                            .to_string()
+                    );
+                }
+            }
+        }
+
+        self.log(actor, claim, "ALLOWED".to_string(), timestamp);
+        Ok(self.notice())
+    }
+
+    /// --------------------------
+    /// LOGGING
+    /// --------------------------
+    fn log(
+        &mut self,
+        actor: String,
+        claim: ClaimType,
+        decision: String,
+        timestamp: u64,
+    ) {
+        self.logs.push(
+            GuardLog {
+                timestamp,
+                actor,
+                claim_type: claim,
+                decision,
+            }
+        );
+    }
+
+    /// --------------------------
+    /// USER NOTICE
+    /// --------------------------
+    fn notice(&self) -> String {
+        "NOTICE:
+Pi Network has no official price.
+GCV is a community discussion concept only.
+Never share private keys.
+Beware of scams and misinformation."
+            .to_string()
+    }
+
+    /// --------------------------
+    /// GOVERNANCE HOOK
+    /// --------------------------
+    fn set_epoch(&mut self, epoch: NetworkEpoch) {
+        self.state.epoch = epoch;
+    }
+
+    fn enable_market_price(&mut self, status: bool) {
+        self.state.allow_market_price = status;
+    }
+}