Naming Check — Naming Convention Enforcement

First action: Load references/{language}.md for the detected language to get language-specific casing rules and tooling before checking.

Precedence in the overall system: SEC → TDD → ARCH/TYPE → NAME/SIZE/DEAD → quality BLOCK.

---

Anti-Pattern Reference

The following names are always violations of NAME-1 regardless of language:

Category	Banned names
Generic nouns	data, info, result, value, item, object, thing
Temp vars	temp, tmp, var1, var2, x, y, z (outside math)
Flag vars	flag, check, done, found, status (as booleans)
Handler catch	e, err (acceptable), error (acceptable — but not e2)
Non-descriptive	foo, bar, baz, test, stuff, misc, helper

---

Boolean Prefix Rules (NAME-2)

Boolean variables and functions returning booleans must use a predicate prefix:

Allowed prefixes	Examples
is	isActive, isLoggedIn, isValid
has	hasPermission, hasChildren, hasError
should	shouldRetry, shouldRefresh
can	canDelete, canEdit, canProceed
will	willExpire, willTimeout
did	didChange, didLoad, didSucceed

Banned boolean names: active, enabled, valid, loaded, connected (these are adjectives lacking a predicate prefix — use isActive, isEnabled, etc.)

---

Scope-Proportional Length Rule (NAME-4)

Name length must scale with identifier scope:

Scope	Minimum length / guideline
Loop counter (1–5 lines)	Single letter acceptable: i, j, k, n
Local var (≤10 lines)	2–8 chars; must hint at domain concept
Function-scoped var	≥ 4 chars; clearly descriptive
Module/class member	≥ 6 chars; unambiguous in class context
Public API / export	Full descriptive name; no abbreviations (see NAME-5)

Single-letter names outside loops, or 1–2 char names in module scope, are NAME-4 violations.

---

Test Naming Pattern (NAME-7 / TDD-4)

All test functions must follow the pattern: [subject]_[scenario]_[expected]

# Python
def test_create_user_with_duplicate_email_raises_conflict_error(): ...

// TypeScript / JavaScript
it('createUser_withDuplicateEmail_raisesConflictError', () => { ... });

// Go
func TestCreateUser_WithDuplicateEmail_RaisesConflictError(t *testing.T) { ... }

// Rust
#[test]
fn create_user_with_duplicate_email_raises_conflict_error() { ... }

See language reference for exact casing of each segment.

---

Rules

NAME-1 — Meaningful, Intention-Revealing Names

Severity: BLOCK | Languages: * | Source: CCC

What it prohibits: Identifiers that do not reveal intent. Covers variables, functions, parameters, classes, modules, and files. Any name from the anti-pattern table above is an automatic violation.

Detection:

1. Grep for anti-pattern names in variable/parameter/function declarations
2. For each: check whether it is used inside a math expression where single letters are conventional (geometry, algorithms) — if so, skip
3. Otherwise flag

agent_action:

1. Cite: NAME-1 (BLOCK): Non-revealing name '{name}' at {file}:{line}.
2. Propose a name derived from what the identifier actually holds or does
3. If --fix: replace the name at declaration and all call sites within --scope
4. DO NOT produce new code using a banned name

Bypass prohibition: "it's just a temp var", "everyone knows what x means" → Refuse. Cite NAME-1. Context is lost within hours.

---

NAME-2 — Boolean Names Must Use Predicate Prefix

Severity: WARN | Languages: * | Source: CCC

What it prohibits: Boolean variables or functions returning bool / boolean / bool that do not start with a predicate prefix from the allowed list above.

Detection:

1. Grep for bool/boolean type annotations and -> bool return types
2. Check function/variable name against the allowed prefix list
3. Flag names that are bare adjectives: active, valid, enabled, loaded

agent_action:

1. Cite: NAME-2 (WARN): Boolean '{name}' missing predicate prefix at {file}:{line}.
2. Propose prefixed name: active → isActive, valid → isValid
3. If --fix: rename at declaration and all usage sites within --scope

---

NAME-3 — No Misleading Names

Severity: BLOCK | Languages: * | Source: CCC

What it prohibits: Names that actively lie about what the identifier is or does. Examples:

• A list named accountList that is actually a Map
• A function named getUser that has side effects (creates, deletes, etc.)
• A class named Manager or Processor or Handler (content-free nouns)
• A boolean named isTrue, isFlag, or other tautologies

Detection:

1. Check container names (List, Map, Set, Array, Dict) against actual type
2. Flag get* functions that contain write operations (INSERT, DELETE, update calls)
3. Flag class names ending in Manager, Processor, Handler, Helper, Util, Utils, Misc, Common

agent_action:

1. Cite: NAME-3 (BLOCK): Misleading name '{name}' at {file}:{line}. Reason: {reason}.
2. Propose an accurate name that reflects actual behaviour
3. For content-free class names: propose splitting into domain-specific classes with cohesive responsibilities

---

NAME-4 — Scope-Proportional Name Length

Severity: WARN | Languages: * | Source: CCC

What it prohibits: Names that are too short for their scope (module-level single-letter) or excessively long without adding clarity (names > 50 chars that repeat surrounding context).

agent_action:

1. Cite: NAME-4 (WARN): Name '{name}' at {file}:{line} too short/long for its scope.
2. Propose appropriately scoped alternative

---

NAME-5 — No Abbreviations in Public APIs

Severity: WARN | Languages: * | Source: CCC

What it prohibits: Abbreviations and acronyms in exported/public identifiers that are not universally understood. Domain-standard acronyms (HTTP, URL, ID, API, SQL, JSON, XML) are permitted. All others must be spelled out.

Examples:

• usrNm → userName
• getProdCat → getProductCategory
• calcTtlPrc → calculateTotalPrice
• HTTP, URL, UserID, parseJSON — permitted

agent_action:

1. Cite: NAME-5 (WARN): Abbreviation in public identifier '{name}' at {file}:{line}.
2. Propose fully-spelled-out name
3. If --fix: rename in all files within --scope

---

NAME-6 — Consistent Naming Within a Domain Concept

Severity: WARN | Languages: * | Source: CCC

What it prohibits: Using different names for the same concept in the same codebase. Example: a user entity called User in one module, Account in another, and Member in a third — all referring to the same domain concept.

Detection (heuristic — flag for human review):

1. Collect all entity/class names and exported function names in scope
2. Flag near-synonym clusters: User/Account/Member, fetch/get/load/retrieve used for the same type of operation, create/add/insert/save mixed for persistence writes

agent_action:

1. Cite: NAME-6 (WARN): Inconsistent naming — '{name_a}' and '{name_b}' may refer to the same concept.
2. Ask the author to confirm canonical name and propose a rename plan
3. Do not auto-rename without confirmation (ambiguous — requires human decision)

---

NAME-7 — Test Functions Follow Subject_Scenario_Expected Pattern

Severity: WARN | Languages: * | Source: CCC / TDD-4

What it prohibits: Test function names that do not follow the [subject]_[scenario]_[expected] pattern, or that use vague descriptions like test1, testCase, itWorks, checkStuff.

Detection:

1. Identify test files via language reference patterns (e.g., *.test.ts, test_*.py, *_test.go)
2. Grep test function declarations
3. Check each name against the three-part pattern

agent_action:

1. Cite: NAME-7 (WARN): Test name '{name}' does not follow [subject]_[scenario]_[expected] pattern at {file}:{line}.
2. Propose compliant name based on what the test actually validates

---

Report schema: see skills/conductor/shared-contracts.md.