diff --git a/README.md b/README.md
index 3211f18..2091f09 100644
--- a/README.md
+++ b/README.md
@@ -71,25 +71,21 @@ happyDomain will delegate observation collection to this endpoint.
 
 ## Rules
 
-Each rule emits a finding code. Severity can be affected by the options above.
-
-| Code | Default severity | Condition |
-|------|-----------------|-----------|
-| `ptr_not_in_reverse_zone` | critical | The PTR owner is not under `in-addr.arpa` or `ip6.arpa`. |
-| `ptr_owner_malformed` | critical | The reverse-arpa owner cannot be decoded back to an IP address. |
-| `ptr_no_reverse_zone` | critical | The reverse zone serving the owner cannot be located (no SOA). |
-| `ptr_query_failed` | critical | The PTR query failed (network error, timeout, unreachable authoritative server). |
-| `ptr_rcode` | critical | The authoritative server returned a non-NOERROR rcode (typically NXDOMAIN). |
-| `ptr_missing` | critical | No PTR record is served at the owner name. |
-| `ptr_multiple` | warning | More than one PTR record exists at the same owner (RFC 1912 §2.1). Suppressed when `allowMultiplePTR` is enabled. |
-| `ptr_declared_mismatch` | critical | The authoritative PTR target differs from the target declared in happyDomain. |
-| `ptr_target_invalid` | critical | The PTR target is not a syntactically valid hostname (RFC 952/1123). |
-| `ptr_generic_hostname` | warning | The PTR target embeds the IP or matches a common ISP auto-generated pattern. Only reported when `flagGenericPTR` is enabled. |
-| `ptr_target_unresolvable` | critical / warning with `requireForwardMatch=false` | The PTR target has no A or AAAA record. |
-| `ptr_forward_mismatch` | critical / warning with `requireForwardMatch=false` | The PTR target's A/AAAA does not include the original IP (FCrDNS check failed). |
-| `ptr_ipv6_missing` | critical | An `ip6.arpa` owner has no PTR record. |
-| `ptr_low_ttl` | warning | The observed PTR TTL is below `minTTL`. |
-| `ptr_declared_low_ttl` | info | The declared PTR TTL is below `minTTL`. |
+| Code                       | Description                                                                                        | Severity |
+|----------------------------|----------------------------------------------------------------------------------------------------|----------|
+| `ptr.in_reverse_arpa`      | Verifies the PTR owner lies under in-addr.arpa or ip6.arpa.                                        | CRITICAL |
+| `ptr.owner_decodable`      | Verifies the reverse-arpa owner name decodes back to an IP address.                                | CRITICAL |
+| `ptr.reverse_zone_located` | Verifies the reverse zone serving the PTR owner can be located (SOA found).                        | CRITICAL |
+| `ptr.query_succeeded`      | Verifies the PTR query returns NOERROR from the authoritative servers.                             | CRITICAL |
+| `ptr.record_present`       | Verifies at least one PTR record is served at the owner name.                                      | CRITICAL |
+| `ptr.single_record`        | Flags multiple PTR records on the same IP (RFC 1912 §2.1 recommends exactly one).                  | WARNING  |
+| `ptr.declared_match`       | Verifies the PTR target served by the authoritative servers matches the declared target.           | CRITICAL |
+| `ptr.target_syntax_valid`  | Verifies the PTR target is a syntactically valid hostname (RFC 952/1123).                          | CRITICAL |
+| `ptr.generic_hostname`     | Flags PTR targets that embed the IP or match common ISP auto-generated patterns.                   | WARNING  |
+| `ptr.target_resolves`      | Verifies the PTR target resolves to at least one A or AAAA record.                                 | CRITICAL |
+| `ptr.fcrdns_match`         | Verifies the PTR target's A/AAAA resolves back to the original IP (Forward-Confirmed Reverse DNS). | CRITICAL |
+| `ptr.ipv6`                 | Reports whether the PTR concerns an IPv6 (ip6.arpa) address.                                       | CRITICAL |
+| `ptr.ttl_hygiene`          | Verifies the PTR TTL is at or above the configured minimum.                                        | WARNING  |
 
 ## License