diff --git a/src/agent_rules_kit/redaction.py b/src/agent_rules_kit/redaction.py
index d993360..3466770 100644
--- a/src/agent_rules_kit/redaction.py
+++ b/src/agent_rules_kit/redaction.py
@@ -30,6 +30,18 @@ class RedactionPattern:
         name="aws_access_key",
         pattern=re.compile(r"AKIA[0-9A-Z]{16}"),
     ),
+    RedactionPattern(
+        name="huggingface_token",
+        pattern=re.compile(r"hf_[A-Za-z0-9]{20,}"),
+    ),
+    RedactionPattern(
+        name="slack_token",
+        pattern=re.compile(r"xox[bpsa]-[A-Za-z0-9-]{10,}"),
+    ),
+    RedactionPattern(
+        name="npm_token",
+        pattern=re.compile(r"npm_[A-Za-z0-9]{20,}"),
+    ),
     RedactionPattern(
         name="private_key_block",
         pattern=re.compile(
diff --git a/tests/test_redaction.py b/tests/test_redaction.py
index 878c830..a01affb 100644
--- a/tests/test_redaction.py
+++ b/tests/test_redaction.py
@@ -45,6 +45,30 @@ def test_redacts_private_key_block(self) -> None:
         self.assertEqual(redacted, f"key:\n{REDACTION_TEXT}")
         self.assertNotIn("abc123", redacted)
 
+    def test_redacts_huggingface_like_token(self) -> None:
+        secret = "hf_" + ("F" * 36)
+
+        redacted = redact_secret_like_values(f"huggingface={secret}")
+
+        self.assertEqual(redacted, f"huggingface={REDACTION_TEXT}")
+        self.assertNotIn(secret, redacted)
+
+    def test_redacts_slack_like_token(self) -> None:
+        secret = "xoxb-" + ("1" * 12) + "-" + ("2" * 12) + "-" + ("G" * 24)
+
+        redacted = redact_secret_like_values(f"slack={secret}")
+
+        self.assertEqual(redacted, f"slack={REDACTION_TEXT}")
+        self.assertNotIn(secret, redacted)
+
+    def test_redacts_npm_like_token(self) -> None:
+        secret = "npm_" + ("H" * 36)
+
+        redacted = redact_secret_like_values(f"npm={secret}")
+
+        self.assertEqual(redacted, f"npm={REDACTION_TEXT}")
+        self.assertNotIn(secret, redacted)
+
     def test_redacts_multiple_secret_like_values(self) -> None:
         openai_like = "sk-" + ("D" * 24)
         github_like = "gho_" + ("E" * 36)