Validators Reference

Validators Reference

All rules, what they check, their defaults, and configuration properties.

Rule IDs are stable identifiers you can use in CI output, JSON reports, and config overrides.

Priority levels: P0 = critical (pipeline-breaking), P1 = major, P2 = minor, P3 = info.

Note: All checks can be toggled per-validator in your ASVCheckerConfig DataAsset. See Configuration for setup.

Naming Convention

Class: UASVValidator_NamingConvention. Checks asset names against Allar's UE5 Style Guide prefix/suffix/pattern conventions. Works via asset registry tags — no asset loading required.

Rule ID	What it checks	Default	Config property	Auto-fix
missing_prefix	Asset name doesn't start with the required prefix for its class (e.g. BP_, T_, SM_)	On — P0	bCheckPrefix, DefaultClassPrefixes, ClassRules	Yes — renames asset, adds prefix
duplicate_prefix	Prefix is repeated in the name (e.g. BP_BP_MyActor)	On — P0	bCheckPrefix, DefaultClassPrefixes	Yes — renames, removes duplicate
missing_suffix	Required suffix for the class is absent (e.g. _SC for SoundConcurrency)	On — P1	bCheckSuffix, DefaultClassSuffixes	Yes — renames, adds suffix
missing_allowed_suffix	World asset doesn't end with one of the allowed level suffixes (_P, _Audio, _Lighting, _Geo, _Gameplay)	On — P1	bCheckAllowedSuffix, ClassRules[].AllowedSuffixes	Yes — renames, adds first allowed suffix
name_pattern_mismatch	Name doesn't match the regex pattern or contains a disallowed substring (__, -)	Off — P1	bCheckNamePattern, NamePattern, DisallowSubstrings	No
non_ascii_name	Asset name contains non-ASCII characters (Cyrillic, CJK, etc.)	Off — P1	bCheckNonAsciiName	No
junk_name	Name contains a placeholder/junk word anywhere (start, middle or end): New, Default, Untitled, Copy, Temp, Test, Example, Template, Placeholder. Matched as a whole word only — Temple or Latest are not flagged	Off — P1	bCheckJunkName, DisallowedNames	Yes — strips junk word when a meaningful name remains
wrong_case	A word segment in the asset name starts with a lowercase letter (e.g. T_cross instead of T_Cross). Skipped when the prefix itself is missing to avoid double-flagging.	Off — P2	bCheckPascalCase, PascalCasePriority	Yes — capitalizes first letter of each name segment

Common prefixes (built-in defaults)

Asset type	Prefix	Asset type	Prefix
Blueprint	BP_	Widget Blueprint	WBP_
Animation Blueprint	ABP_	Function Library	BPL_
Static Mesh	SM_	Skeletal Mesh	SK_
Material	M_	Material Instance	MI_
Texture / Texture2D	T_	Render Target	RT_
Sound Wave	S_	Sound Cue	SC_
Niagara System	NS_	Particle System	PS_
Data Asset	DA_	Data Table	DT_
Enum	E_	Struct	F_
World (Level)	L_	Level Sequence	SEQ_

The full list (80+ types) follows Allar's UE5 Style Guide. Override or extend via DefaultClassPrefixes or ClassRules.

Custom class prefixes

For project-specific asset types (e.g. GA_ for Gameplay Abilities, GE_ for Gameplay Effects, GC_ for Gameplay Cues):

1. Open Content/Data/DA_ASV_AllarStyleGuide
2. Expand ASVValidator_NamingConvention in the Validators list
3. Under Class Rules, click + to add a new entry
4. Set Class Picker to the parent class (e.g. UGameplayAbility) — all Blueprint subclasses will match automatically via IsChildOf
5. Set Prefix to GA_
6. Optionally set Suffix or Target Folders

Tip: Use Default Class Prefixes (a key/value map on the same validator) for simpler cases where you only need a class name → prefix mapping and don't need inheritance matching. Example: add "GameplayEffect_C" → "GE_".

Folder Structure

Class: UASVValidator_FolderStructure. Checks that assets are in the expected folder for their class, and that folder names follow path conventions.

Rule ID	What it checks	Default	Config property	Auto-fix
wrong_folder	Asset is not under any of the allowed folders for its class (e.g. a Material outside Materials/)	On — P0	bCheckWrongFolder, ClassRules	Yes — moves asset to best matching folder
folder_contains_unicode	A folder segment contains non-ASCII characters	On — P0	bCheckUnicode	No
folder_not_pascal_case	A folder segment starts with a lowercase letter or contains underscores	Off — P1	bCheckPascalCase	No
folder_disallowed_name	A folder has a generic/redundant name: Assets, AssetTypes, Meshes, Textures, Materials	Off — P1	bCheckDisallowedNames, DisallowedFolderNames	No
folder_in_developers	Asset is inside /Game/Developers/ — should not ship to production	On — P2	bCheckDevelopersFolder	No

Note: folder_disallowed_name is off by default because many existing projects use generic folder names. Enable it for new projects or when enforcing stricter standards.

To enable: open DA_ASV_AllarStyleGuide → expand ASVValidator_FolderStructure → set bCheckDisallowedNames = true and add names to DisallowedFolderNames (e.g. Assets, Meshes, Textures).

Texture

Class: UASVValidator_Texture. Reads texture properties from asset registry tags — no full asset load required for most checks.

Rule ID	What it checks	Default	Config property	Auto-fix
texture_not_power_of_two	Texture width or height is not a power of two (required for mipmaps and some GPU formats)	Off — P1	bCheckPowerOfTwo	No — must reimport at correct size
texture_exceeds_max_size	Texture dimension exceeds MaxTextureSize (default 8192)	On — P0	bCheckMaxSize, MaxTextureSize	No — must reimport at smaller size
texture_wrong_srgb	sRGB flag doesn't match texture type. Color textures (_D, _C, _Albedo) must have sRGB on; data textures (_N, _M, _R, _ARM) must have it off.	Off — P1	bCheckSRGB	Yes — sets correct sRGB flag
texture_wrong_compression	Compression settings don't match texture type by suffix (e.g. normal maps should use TC_NormalMap)	Off — P2	bCheckCompression	Yes — sets correct compression
texture_wrong_group	LOD group doesn't match expected for texture type (e.g. UI textures should use TEXTUREGROUP_UI)	Off — P2	bCheckTextureGroup, ExpectedTextureGroup	Yes — sets correct LOD group

Suffix-based type detection

The texture validator detects type from the asset name suffix:

Suffix	Type	sRGB	Compression
_D, _C, _Albedo, _BC	Diffuse / Color	On	BC1/BC3 (default)
_N, _NRM, _Normal	Normal map	Off	TC_NormalMap
_M, _R, _S, _Mask	Mask / Roughness / Metallic	Off	TC_Masks
_E, _Emissive	Emissive	On	BC3 (default)
_ARM, _ORM	Packed channel (AO/R/M)	Off	TC_Masks
_UI	UI texture	On	TC_EditorIcon

Blueprint

Class: UASVValidator_Blueprint. Loads each Blueprint to inspect variable definitions and compilation state. Slower than tag-only checks — prefer OnSave trigger.

Variable naming

Rule ID	What it checks	Default	Config property	Auto-fix
bp_bool_no_prefix	Boolean variable doesn't start with b (Allar 3.2.1.3)	Off — P1	bCheckBoolPrefix	Yes — renames, adds b prefix
bp_bool_is_pattern	Boolean uses bIs, bHas, bCan pattern — prefer bDead over bIsDead (Allar 3.2.1.4)	Off — P2	bCheckBoolIsPattern	Yes — renames, removes Is/Has/Can
bp_var_not_pascal_case	Variable name doesn't start with an uppercase letter (Allar 3.2.1.2)	Off — P1	bCheckPascalCase	Yes — capitalizes first letter
bp_var_atomic_type_name	Variable name contains atomic type in the name (e.g. ScoreFloat — use Score instead) (Allar 3.2.1.6)	Off — P2	bCheckAtomicTypeName	No
bp_var_redundant_context	Variable name repeats the Blueprint class name (e.g. PlayerHealth in BP_Player) (Allar 3.2.1.5)	Off — P2	bCheckRedundantContext	No
var_array_not_plural	TArray variable name is not plural (e.g. Enemy should be Enemies) (Allar 3.2.1.8)	Off — P2	bCheckArrayPlural	No
var_missing_type_name	Struct/Object variable doesn't include the type name (e.g. Hit instead of HitResult) (Allar 3.2.1.7)	Off — P2	bCheckComplexTypeName	No

Variable metadata

Rule ID	What it checks	Default	Config property	Auto-fix
bp_editable_missing_tooltip	Editable variable (EditAnywhere / EditDefaultsOnly) has no tooltip (Allar 3.2.2.1)	Off — P2	bCheckEditableTooltips	No
bp_editable_missing_range	Editable numeric variable has no ClampMin/ClampMax range defined (Allar 3.2.2.2)	Off — P3	bCheckEditableRanges	No
bp_var_config_flag	Variable uses the Config flag — BPs should not use Config (Allar 3.2.8)	Off — P1	bCheckConfigFlag	No
bp_vars_uncategorized	Blueprint has more than UncategorizedVarThreshold editable variables with no category (Allar 3.2.3)	Off — P3	bCheckUncategorizedVars, UncategorizedVarThreshold (default 5)	No

Compilation

Rule ID	What it checks	Default	Config property	Auto-fix
blueprint_compile_error	Blueprint has compilation errors (BS_Error state)	On — P0	bCheckCompilation	No
blueprint_compile_warning	Blueprint compiles with warnings (BS_UpToDateWithWarnings state) — e.g. deprecated nodes after an engine upgrade	Off — P2	bCheckCompileWarnings	No

Note: var_array_not_plural and var_missing_type_name are off by default — they produce many false positives on real projects and require the team to adopt strict naming conventions first.

To enable: open DA_ASV_AllarStyleGuide → expand ASVValidator_Blueprint → set bCheckArrayPlural or bCheckComplexTypeName to true.

Static Mesh

Class: UASVValidator_Mesh. Loads UStaticMesh to inspect collision, LODs, and Nanite settings.

Rule ID	What it checks	Default	Config property	Auto-fix
mesh_no_collision	Static mesh has no collision geometry (no simple or complex collision set up)	Off — P1	bCheckCollision	No — add collision in mesh editor
mesh_no_lods	Mesh above MinTriCountForLOD triangles has only one LOD level	Off — P2	bCheckLODs, MinTriCountForLOD (default 5000)	No — set up LODs in mesh editor or via auto-LOD
mesh_nanite_policy	Mesh Nanite state doesn't match project policy (MustEnable, MustDisable, or AllowAny). Triangle threshold applies for MustEnable.	Off — P2	bCheckNanite, NanitePolicy, MinTriCountForNanite (default 10000)	Yes — enables or disables Nanite per policy

Note: mesh_nanite_policy is off by default. Enable it only when your project has a firm Nanite policy — it will flag every mesh above the triangle threshold that doesn't comply.

To enable: open DA_ASV_AllarStyleGuide → expand ASVValidator_Mesh → set bCheckNanite = true, choose NanitePolicy (MustEnable / MustDisable / AllowAny), and optionally adjust MinTriCountForNanite (default 10 000).

Asset Health

Class: UASVValidator_AssetHealth. Checks general asset health — stale redirectors, potentially more in future versions. Reads from the asset registry without loading assets.

Rule ID	What it checks	Default	Config property	Auto-fix
stale_redirector	An ObjectRedirector asset exists at this path — left over from a rename or move that was never cleaned up	On — P1	bCheckRedirectors	Yes — runs Fix Up Redirectors (same as right-click in Content Browser)