diff --git a/server/src/dashboard.html b/server/src/dashboard.html
index f47314c..3770fe4 100644
--- a/server/src/dashboard.html
+++ b/server/src/dashboard.html
@@ -1085,10 +1085,12 @@
             `);
             
             loadGenericList('/api/adrs', 'adrs-container', item => `
-                <strong>${item.title}</strong>
-                <div style="font-size:0.9em; margin-bottom:8px;"><em>Context:</em> ${item.context || ''}</div>
+                <strong>${item.id} | ${item.title}</strong>
+                <span style="float:right; background:var(--canvas-bg); padding:2px 6px; border-radius:4px; font-size:0.8em; border:1px solid var(--border-color); ${item.status === 'superseded' ? 'text-decoration: line-through; color:var(--error-color);' : 'color:var(--success-color);'}">${item.status}</span>
+                <div style="font-size:0.9em; margin-bottom:8px; margin-top:8px;"><em>Context:</em> ${item.context || ''}</div>
                 <div style="font-size:0.9em; margin-bottom:8px;"><em>Decision:</em> ${item.decision || ''}</div>
-                <div style="font-size:0.9em;"><em>Consequences:</em> ${item.consequences || ''}</div>
+                <div style="font-size:0.9em; margin-bottom:8px;"><em>Consequence:</em> ${item.consequence || ''}</div>
+                ${item.supersedes ? `<div style="font-size:0.9em; font-weight:bold; color:var(--warning-color);">Supersedes: ${item.supersedes}</div>` : ''}
             `);
 
             loadGenericList('/api/context_workspaces', 'workspaces-container', item => `
diff --git a/server/src/handlers/meta.rs b/server/src/handlers/meta.rs
index daa6cf6..f87ccd3 100644
--- a/server/src/handlers/meta.rs
+++ b/server/src/handlers/meta.rs
@@ -25,6 +25,17 @@ impl McpTool for LogDecisionHandler {
         let mut final_id = String::new();
 
         state.adrs.modify(|adrs| {
+            if let Some(superseded_id) = &req.supersedes {
+                for old_adr in adrs.iter_mut() {
+                    if old_adr.id == *superseded_id {
+                        old_adr.status = "superseded".to_string();
+                        // Re-index the modified old ADR
+                        drop(idx.index_adr(old_adr));
+                        break;
+                    }
+                }
+            }
+
             final_id = format!("ADR-{:04}", adrs.len() + 1);
             let a = Adr {
                 id: final_id.clone(),
@@ -32,6 +43,8 @@ impl McpTool for LogDecisionHandler {
                 context: req.context,
                 decision: req.decision,
                 consequence: req.consequence,
+                status: "accepted".to_string(),
+                supersedes: req.supersedes,
                 timestamp: crate::handlers::utils::now_secs(),
             };
 
diff --git a/server/src/models.rs b/server/src/models.rs
index 1452eab..1ceae6e 100644
--- a/server/src/models.rs
+++ b/server/src/models.rs
@@ -82,8 +82,16 @@ pub struct Adr {
     pub context: String,
     pub decision: String,
     pub consequence: String,
+    #[serde(default = "default_adr_status")]
+    pub status: String,
+    #[serde(default)]
+    pub supersedes: Option<String>,
     pub timestamp: u64,
 }
+
+fn default_adr_status() -> String {
+    "accepted".to_string()
+}
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct Preference {
     pub key: String,
diff --git a/server/src/tools.rs b/server/src/tools.rs
index d548c4d..486b477 100644
--- a/server/src/tools.rs
+++ b/server/src/tools.rs
@@ -220,6 +220,8 @@ pub struct LogDecisionTool {
     pub decision: String,
     /// The consequence of the decision.
     pub consequence: String,
+    /// The ID of an older ADR this decision supersedes, if any.
+    pub supersedes: Option<String>,
 }
 
 /// Query architectural decision records.