diff --git a/internal/config/allowlist/allowed_ext_test.go b/internal/config/allowlist/allowed_ext_test.go
index 0d128468..79c08d8b 100644
--- a/internal/config/allowlist/allowed_ext_test.go
+++ b/internal/config/allowlist/allowed_ext_test.go
@@ -28,6 +28,10 @@ func TestIsAllowedExt(t *testing.T) {
 		{".FTLH", true},
 		{".ftlx", true},
 		{".FTLX", true},
+		{".graphql", true},
+		{".GRAPHQL", true},
+		{".gql", true},
+		{".GQL", true},
 		{".txt", false},
 		{".md", false},
 		{".png", false},
diff --git a/internal/config/allowlist/supported_file_types.json b/internal/config/allowlist/supported_file_types.json
index 69b9b416..a9a64fa3 100644
--- a/internal/config/allowlist/supported_file_types.json
+++ b/internal/config/allowlist/supported_file_types.json
@@ -69,5 +69,7 @@
   ".ets",
   ".json5",
   ".dart",
-  ".tf"
+  ".tf",
+  ".graphql",
+  ".gql"
 ]
diff --git a/internal/config/rules/rule_docs/graphql.md b/internal/config/rules/rule_docs/graphql.md
new file mode 100644
index 00000000..3c20f90c
--- /dev/null
+++ b/internal/config/rules/rule_docs/graphql.md
@@ -0,0 +1,40 @@
+> Favor precision over recall: only raise an issue when you are confident it is a real defect, and stay silent when the surrounding context is unclear — a false alarm costs more reviewer trust than a missed minor issue. Treat security and correctness findings as blocking, and style or idiom suggestions as non-blocking. Review only what is observable in the schema (SDL) or operation text under review; do not infer resolver behavior that lives in code outside this file.
+
+#### Obvious Typos or Spelling Errors
+- Spelling errors in type, field, enum-value, argument, input, directive, or fragment names at their declaration sites; do not report spelling errors at reference sites
+- Typos in descriptions or field names that affect readability of the public API surface
+
+#### Schema Evolution and Breaking Changes
+- Removing or renaming an existing type, field, enum value, or argument that clients may already depend on
+- Making a previously nullable input field or argument non-null, or adding a new required (non-null, no-default) argument to an existing field
+- Changing a field or argument type to an incompatible type
+- `@deprecated` applied without a non-empty `reason`
+- Do not flag purely additive changes: new types, new fields, new enum values appended, or new optional (nullable / defaulted) arguments
+- GraphQL has no numeric field tags — do not import Protocol Buffers field-number or renumbering concepts
+
+#### Naming Conventions
+- Types (object, interface, union, enum, input, scalar) should be `PascalCase`; fields, arguments, and input fields `camelCase`; enum values `UPPER_CASE`
+- Redundant `query`/`get` prefixes on `Query` fields, `mutation`/`subscription` affixes on their root fields, and `type`/`enum`/`interface`/`union` affixes in type names
+- Do not flag names that already follow these conventions merely to suggest a synonym
+
+#### Schema Design
+- Nullability that hides required-vs-optional intent (e.g. a field that can never be null typed as nullable, or a genuinely optional field typed non-null)
+- Types unreachable from any root field (`Query`/`Mutation`/`Subscription`) — dead schema
+- Missing descriptions on public types and fields that form the API contract
+- Names prefixed with `__` (reserved for introspection)
+- List fields returning a collection without a pagination or limit argument (`first`/`last`/`limit`/`after`), which allows unbounded result sets
+
+#### Operations and Fragments
+- Selecting `@deprecated` fields in queries, mutations, or fragments
+- Fragment cycles, unused fragments, and unused or undefined operation variables
+- Anonymous operations where a named operation aids caching and debugging
+- Missing leaf selections on fields that return object/interface/union types
+- Do not flag well-formed operations that merely differ in stylistic preference
+
+#### Security and Resource Limits
+- Only flag when the condition is observable in the schema or operation text under review
+- Unbounded list fields (see Schema Design) or deeply nested / recursive selections with no documented depth or complexity limit (query-depth DoS surface)
+- A field carrying clearly sensitive data (token, secret, password, or PII by name or description) exposed without an accompanying auth-related directive or comment
+- An explicit directive, configuration, or comment in the diff that enables introspection on an untrusted surface
+- Do not infer resolver-level N+1 cost, dataloader/batching usage, or runtime introspection state — those live in resolver code, not in schema or operation files
+- Do not report when a limit is enforced and clearly documented outside the schema
diff --git a/internal/config/rules/system_rules.json b/internal/config/rules/system_rules.json
index 2eb8aa83..08b18350 100644
--- a/internal/config/rules/system_rules.json
+++ b/internal/config/rules/system_rules.json
@@ -22,6 +22,7 @@
     "**/*.c": "c.md",
     "**/*.py": "python.md",
     "**/*.po": "po.md",
-    "**/*.pot": "pot.md"
+    "**/*.pot": "pot.md",
+    "**/*.{graphql,gql}": "graphql.md"
   }
 }
diff --git a/internal/config/rules/system_rules_test.go b/internal/config/rules/system_rules_test.go
index 1e532c65..2e230a89 100644
--- a/internal/config/rules/system_rules_test.go
+++ b/internal/config/rules/system_rules_test.go
@@ -90,6 +90,8 @@ func TestResolve_DefaultRules(t *testing.T) {
 		{"i18n/app.po", "Plural Forms"},
 		{"locale/messages.pot", "Placeholder Consistency"},
 		{"i18n/app.pot", "Header Integrity"},
+		{"api/schema.graphql", "Breaking Changes"},
+		{"queries/user.gql", "Breaking Changes"},
 	}
 
 	for _, tt := range tests {