diff --git a/src/hooks/init.rs b/src/hooks/init.rs
index 64115a1d..36b0fac9 100644
--- a/src/hooks/init.rs
+++ b/src/hooks/init.rs
@@ -582,6 +582,36 @@ pub fn uninstall(global: bool, gemini: bool, codex: bool, cursor: bool, verbose:
         removed.push("Integrity hash: removed".to_string());
     }
 
+    // 1c. Remove orphaned .github/hooks/rtk-rewrite.json (broken command from old rtk init --copilot)
+    let github_hook_path = PathBuf::from(".github/hooks/rtk-rewrite.json");
+    if github_hook_path.exists() {
+        let content = fs::read_to_string(&github_hook_path).unwrap_or_default();
+        let command = serde_json::from_str::<serde_json::Value>(&content)
+            .ok()
+            .and_then(|j| {
+                j.get("hooks")?
+                    .get("PreToolUse")?
+                    .as_array()?
+                    .first()
+                    .cloned()
+            })
+            .and_then(|e| e.get("command")?.as_str().map(String::from))
+            .unwrap_or_default();
+
+        if command == "rtk hook" {
+            fs::remove_file(&github_hook_path).with_context(|| {
+                format!(
+                    "Failed to remove orphaned hook: {}",
+                    github_hook_path.display()
+                )
+            })?;
+            removed.push(format!(
+                "Orphaned Copilot hook: {} (broken \"rtk hook\" command)",
+                github_hook_path.display()
+            ));
+        }
+    }
+
     // 2. Remove RTK.md
     let rtk_md_path = claude_dir.join("RTK.md");
     if rtk_md_path.exists() {
@@ -2017,6 +2047,42 @@ fn show_claude_config() -> Result<()> {
         println!("[--] Cursor: home dir not found");
     }
 
+    // Check for orphaned .github/hooks/rtk-rewrite.json (generated by older rtk init --copilot)
+    let github_hook_path = PathBuf::from(".github/hooks/rtk-rewrite.json");
+    if github_hook_path.exists() {
+        let content = fs::read_to_string(&github_hook_path).unwrap_or_default();
+        let command = serde_json::from_str::<serde_json::Value>(&content)
+            .ok()
+            .and_then(|j| {
+                j.get("hooks")?
+                    .get("PreToolUse")?
+                    .as_array()?
+                    .first()
+                    .cloned()
+            })
+            .and_then(|e| e.get("command")?.as_str().map(String::from))
+            .unwrap_or_default();
+
+        if command == "rtk hook" {
+            println!(
+                "\n[warn] .github/hooks/rtk-rewrite.json: broken hook command (\"rtk hook\" missing subcommand)"
+            );
+            println!("   → Generated by an older version of rtk init --copilot");
+            println!("   → Every Bash tool call logs a spurious parse_failure in history.db");
+            println!("   → Check impact: rtk gain --failures");
+            println!("   → Fix: delete the file or run `rtk init --copilot` to regenerate it");
+        } else if command == "rtk hook copilot" {
+            println!(
+                "\n[ok] .github/hooks/rtk-rewrite.json: Copilot hook configured"
+            );
+        } else if !command.is_empty() {
+            println!(
+                "\n[warn] .github/hooks/rtk-rewrite.json: unexpected command: \"{}\"",
+                command
+            );
+        }
+    }
+
     println!("\nUsage:");
     println!("  rtk init              # Full injection into local CLAUDE.md");
     println!("  rtk init -g           # Hook + RTK.md + @RTK.md + settings.json (recommended)");