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PitLane Backend API Audit & Analysis

Date: March 2, 2026 | Framework: Fastify + TypeScript + Prisma ORM + PostgreSQL

Executive Summary

Your API is moderately homogeneous with good foundational patterns, but has several critical gaps in data integrity, validation consistency, and error handling. The architecture is solid, but implementation varies significantly across modules.

Overall Health Score: 6.5/10 ⚠️

Key Findings

  • ✅ Strengths: Standardized response format, good error classifications, transaction usage
  • ⚠️ Warnings: Incomplete input validation, missing DTOs/schemas, inconsistent error handling
  • 🔴 Critical: Authorization gaps, missing business logic validation, race conditions in some endpoints

1. Architecture & Layering ✅ GOOD

Current Pattern

routes → handler functions → controller (class-based) → service → database

Assessment: CONSISTENT

  • Routes properly delegate to handlers
  • Handlers parse input and call controllers
  • Controllers orchestrate business logic via services
  • Services handle database operations

Issues Found:

  • Auth module: Mixes concerns - auth.ts does both middleware + user lookup
  • Leagues/Drafts: Use class-based controllers (✅ good)
  • Notifications/Users: Use function-based handlers (inconsistent with leagues/drafts)
  • No clear input validation layer - scattered across controllers/services

2. Response Standardization ✅ GOOD

Status: STANDARDIZED

All responses follow consistent format:

// Success
{ success: true, data: T }

// Error
{ success: false, error: { code, message, details? } }

Coverage:

  • ✅ 8/8 modules use sendSuccess() / sendError() from api-response.ts
  • ✅ Standard error codes defined in ErrorCode enum
  • ✅ HTTP status codes properly mapped

Issues Found:

  • Some error responses bypass the standard (auth middleware returns raw { error: string })
  • Not all error codes are used consistently across modules
  • Missing specific error codes for:
    • Draft-specific errors (timeout, unavailable driver, etc.)
    • Scoring errors (calculation failures)
    • Payment/subscription errors

3. Error Handling & Recovery 🟡 INCONSISTENT

Error Code Coverage

Used Codes:

  • UNAUTHORIZED, INVALID_TOKEN, TOKEN_EXPIRED ✅
  • FORBIDDEN, VALIDATION_ERROR ✅
  • NOT_FOUND variants ✅
  • ALREADY_EXISTS, DUPLICATE_ENTRY ✅
  • BUSINESS_RULE_VIOLATION ✅

Missing Codes:

RATE_LIMITED
DRAFT_WINDOW_CLOSED
DRIVER_ALREADY_PICKED
LEAGUE_FULL_ERROR
MISSING_REQUIRED_FIELDS
INVALID_STATE_TRANSITION
CONCURRENT_MODIFICATION
DATA_INTEGRITY_ERROR

Critical Issues

Issue #1: Auth Middleware Doesn't Use Standard Response

auth.ts

// ❌ WRONG - Doesn't use sendError()
reply.status(401).send({ error: 'No token provided' });

// ✅ SHOULD BE
sendError(reply, ApiError.unauthorized('No token provided'));

Impact: Inconsistent error format from auth failures, breaks client parsing

Issue #2: Services Throw Generic Error Strings

// ❌ BAD - No error codes
throw new Error('Username already taken');
throw new Error('League name already exists for this season');

// ✅ GOOD - Specific error codes
throw ApiError.conflict('Username already taken');

Impact: Controllers don't know severity level, can't set correct HTTP status

Issue #3: Incomplete Error Handling in Complex Operations

scoring.service.ts#226

await this.prisma.$transaction(async (tx) => {
  // No error context added to transaction operations
  // If tx fails, no details about which league/race failed
});

4. Input Validation 🔴 CRITICAL GAPS

Status: INCONSISTENT & INCOMPLETE

Module-by-Module Assessment:

Module DTOs Zod Schemas Manual Validation Score
Auth ✅ login.dto.ts ✅ Full coverage ✅ Password regex 9/10
Users ❌ No DTO ❌ No schemas ⚠️ Inline strings 4/10
Leagues ❌ No DTO ❌ No schemas ⚠️ Inline strings 4/10
Drafts ❌ No DTO ❌ No schemas ❌ Missing 2/10
Scoring ❌ No DTO ❌ No schemas ❌ None 1/10
Notifications ❌ No DTO ❌ No schemas ❌ Incomplete 2/10
F1Data ❌ Unknown ❌ Unknown ❌ Unknown ?
Admin ❌ No DTO ⚠️ Partial ⚠️ Incomplete 3/10

Critical Gaps

Gap #1: No Validation for Scoring Endpoints

[scoring.controller.ts#1-100]

// ❌ NO VALIDATION
async getRaceScores(
  request: FastifyRequest<{ Params: { id: string; round: string } }>,
  reply: FastifyReply
): Promise<void> {
  const { id: leagueId, round } = request.params;
  // round could be: "abc", "-5", "1000", null
  // Only parseInt() is used - no validation!
  
  const race = await this.prisma.race.findFirst({
    where: {
      seasonId: league.seasonId,
      round: parseInt(round, 10), // ❌ Could be NaN
    },
  });
}

Required fixes:

// ✅ SHOULD BE
const roundSchema = z.object({
  id: z.string().cuid(),
  round: z.coerce.number().int().min(1).max(25),
});
const { id: leagueId, round } = roundSchema.parse(request.params);

Gap #2: No Validation for League Creation

[leagues.service.ts#30-50]

async createLeague(userId: string, input: CreateLeagueInput) {
  // input has NO type safety - CreateLeagueInput is just interface
  // No actual runtime validation that:
  // - name is string (not null/array/object)
  // - scoringType is valid enum
  // - maxPlayers is actually a number
  // - seasonId exists
}

Gap #3: Missing Validation in Draft Service

[drafts.service.ts#961]

async submitPick({ draftWindowId, leagueMemberId, driverId }: SubmitPickInput) {
  // ❌ No validation that:
  // - draftWindowId format is valid
  // - leagueMemberId format is valid
  // - driverId format is valid
  // - User making request owns the leagueMemberId
}

5. Authentication & Authorization 🔴 CRITICAL ISSUES

Current Implementation

  • ✅ JWT tokens with expiry
  • ✅ Refresh token rotation
  • ✅ Account lockout on failed attempts (5 attempts, 15 min lockout)
  • ❌ Inconsistent auth middleware usage
  • ❌ Missing authorization checks in several endpoints

Critical Issues

Issue #1: Auth Middleware Not Applied Consistently

[auth.routes.ts#1-110]

// ✅ PROTECTED (auth middleware)
fastify.get('/me', { preHandler: authenticate }, getMeHandler);

// ❌ PUBLIC (should be protected!)
fastify.get('/leagues/:id', getLeagueHandler); 
// But what about /leagues/:id/members (could leak private league data)?

// ❌ Inconsistent
fastify.post('/me/password', { preHandler: authenticate }, ...);
fastify.post('/logout', logoutHandler);  // No auth check!

Issue #2: Missing Role-Based Authorization

No authorization checks for:

  • Who can update draft order? (only commissioner)
  • Who can enter race results? (only admin)
  • Who can set system settings? (only super_admin)
  • Who can flag commissioner issues? (only league members)

Example: [leagues.controller.ts#400+]

async updateDraftOrder(request: FastifyRequest, reply: FastifyReply) {
  const user = getAuthenticatedUser(request);
  const { leagueId } = request.params;
  
  // ❌ NO CHECK: Is user the commissioner?
  // Any authenticated user could update ANY league's draft order!
  
  const league = await this.leaguesService.updateDraftOrder(leagueId, body);
}

Issue #3: Insufficient Permission Checks in Services

[users.service.ts#150+]

async changePassword(userId: string, dto: ChangePasswordDto) {
  // ✅ Good: Verifies current password
  const isValid = await verifyPassword(dto.currentPassword, user.passwordHash);
  
  // ✅ Good: Invalidates all refresh tokens
  await prisma.$transaction([
    prisma.user.update({ ... }),
    prisma.refreshToken.deleteMany({ where: { userId } }),
  ]);
}

// But what about:
async requestEmailChange(userId: string, dto: EmailChangeRequestDto) {
  // ⚠️ Verifies password twice - inefficient
  // ⚠️ Doesn't check if user can actually change email (throttled? verified?)
  // ⚠️ No audit log
}

6. Data Integrity & Transaction Safety 🟡 PARTIAL

Database Constraints

✅ Good:

  • Foreign key constraints with cascading deletes
  • Unique constraints on (seasonId, round) for races
  • Unique constraint on (leagueId, userId) for league members
  • Unique constraint on (draftWindowId, leagueMemberId, round) for draft picks
  • Soft deletes via leftAt timestamp on LeagueMember

❌ Missing:

  • No constraint preventing user from joining same league twice during race conditions
  • No constraint on duplicate email addresses during concurrent email changes
  • Missing indexes on frequently queried fields (e.g., User.id in notifications)

Transaction Usage

Current Statistics:

  • Used in: 9 files
  • Auth: 1 transaction (logout)
  • Users: 2 transactions (password change, email verification)
  • Leagues: 2 transactions (join league, leave league)
  • Drafts: 1 transaction (submit pick)
  • Scoring: 2 transactions (race scores, standings)

Good Examples

[auth.service.ts#469]

// ✅ CORRECT: Transaction ensures both happen or neither
await prisma.$transaction([
  prisma.user.update({ ... passwordHash ... }),
  prisma.refreshToken.deleteMany({ where: { userId } }), // Invalidate all sessions
]);

[users.service.ts#259]

// ✅ CORRECT: Prevents race condition
await prisma.$transaction([
  prisma.emailChangeRequest.updateMany({ cancelledAt: new Date() }),
  prisma.emailChangeRequest.create({ ... newRequest ... }),
]);

Problem Examples

[leagues.service.ts#737]

// ⚠️ INCOMPLETE TRANSACTION
const [member] = await this.prisma.$transaction([
  prisma.leagueMember.create({ ... }),
  // Missing: Update league memberCount? Check if league is full?
  // No validation that league isn't full!
]);

[scoring.service.ts#226]

// ❌ SILENT FAILURES
await this.prisma.$transaction(async (tx) => {
  for (const league of leagues) {
    const scores = await calculateScores(...);
    // If this fails for one league, entire transaction fails
    // No granular error handling or logging
  }
});

7. Type Safety & DTOs 🟡 INCONSISTENT

Current State

  • ✅ All files use TypeScript
  • ✅ Auth module has full DTO coverage (login.dto.ts)
  • ❌ 7/8 modules missing input validation DDOs
  • ❌ Response types are interfaces, not Zod schemas

Examples of Missing Type Safety

No Request DTO Validation

[leagues.controller.ts#20]

// ❌ No validation of request body shape
const body = request.body as CreateLeagueInput;

// Could be:
// { name: null, scoringType: "invalid", maxPlayers: [] }
// No runtime validation!

Should be:

const createLeagueSchema = z.object({
  name: z.string().min(3).max(80),
  seasonId: z.string().cuid(),
  scoringType: z.enum(['fia_official', 'linear_20', 'proprietary']).optional(),
  draftType: z.enum(['snake', 'regular']).optional(),
  // ... etc
});

const input = createLeagueSchema.parse(request.body);

Inconsistent Response Types

[leagues.types.ts]

// Interface - no validation
export interface LeagueResponse {
  id: string;
  name: string;
  // ...
}

// vs Auth
export type LoginResponse = z.infer<typeof loginResponseSchema>; // ✅ Zod-validated

8. Cross-Module Consistency Issues 🔴 CRITICAL

Pattern Inconsistencies

Area Auth Users Leagues Drafts Scoring
Controller Pattern Functions Functions Classes Classes Classes
DTO/Validation Zod ✅ None ❌ None ❌ None ❌ None ❌
Error Handling Good ✅ Inconsistent ⚠️ Inconsistent ⚠️ Minimal ❌ Minimal ❌
Transactions Some ⚠️ Some ⚠️ Some ⚠️ Some ⚠️ Some ⚠️
Rate Limiting Yes ✅ Yes ✅ No ❌ No ❌ No ❌
WebSocket Support No No No Yes ✅ No
Logging Good ✅ Good ✅ Good ✅ Good ✅ Good ✅

Issue #1: Inconsistent Controller Patterns

// Leagues - CLASS BASED
export class LeaguesController {
  constructor(private leaguesService: LeaguesService) {}
  async createLeague(request, reply) { ... }
}

// Auth - FUNCTION BASED
export async function registerHandler(request, reply) { ... }

// This requires different import patterns and makes testing harder

Issue #2: No Consistent Pagination

// Admin lists users with pagination
{ page, limit, search, role, status }

// But drafts list without pagination
getLeagueDraftWindows(leagueId) // Returns all, no limit!

// And notifications use inconsistent param names
{ page, limit, unreadOnly, type }

Issue #3: Inconsistent Error Messages

Same scenario, different errors:

// Leagues
throw new Error('League name already exists for this season');

// Drafts (if it had validation)
throw new Error('Draft already exists for this race');

// Should use consistent pattern:
throw ApiError.conflict('League already exists for season');

9. Race Conditions & Concurrency ⚠️ HIGH RISK

Identified Issues

Issue #1: Draft Pick Submission Race Condition

[drafts.service.ts (not shown)]

// ❌ UNSAFE: Multiple steps in sequence
async submitPick(draftWindowId, leagueMemberId, driverId) {
  // Step 1: Check if draft is open
  const draftWindow = await prisma.draftWindow.findUnique(...);
  if (draftWindow.status !== 'open') throw Error(...);
  
  // Step 2: Check if driver is available (⚠️ BETWEEN 1 & 2, ANOTHER USER PICKED IT!)
  
  // Step 3: Create draft pick
  await prisma.draftPick.create({ driverId });
}
// Result: Two users can pick the same driver

Fix: Use transaction with proper locking

await prisma.$transaction(async (tx) => {
  const [draftWindow, existingPick] = await Promise.all([
    tx.draftWindow.findUnique({ where: { id: draftWindowId } }),
    tx.draftPick.findFirst({ where: { driverId, draftWindowId } }),
  ]);
  
  if (existingPick) throw Error('Driver already picked');
  await tx.draftPick.create(...);
});

Issue #2: League Member Limit Check

[leagues.service.ts#750+]

async joinLeague(leagueId, userId) {
  const league = await this.prisma.league.findUnique({
    include: { members: { where: { leftAt: null } } }
  });
  
  // ❌ UNSAFE: Between check and create, another user could join!
  if (league.members.length >= league.maxPlayers) {
    throw Error('League is full');
  }
  
  // ❌ If this fails, transaction should prevent
  await this.prisma.leagueMember.create({ ... });
}

Issue #3: Email Change During Verification

// ❌ User can request email change, then:
// 1. Another tab initiates email change again
// 2. Verification tokens overlap
// 3. Unclear which change succeeds

10. Missing Validation & Business Rules 🔴 CRITICAL

Validation Gaps

Missing Input Validation

// Scoring - no validation of sorts
GET /races/:round/scores
// - round could be "abc", "-1", "999"

// Leagues - no validation of team name
POST /leagues/:id/join
{ teamName: "..." }
// - teamName could be "", very long, contain injected code

// Drafts - no validation of pick order
POST /drafts/:id/picks
{ driverId: "..." }
// - driverId could be from different season

Missing Business Logic Validation

// If user is already in league, what happens?
POST /leagues/:id/join
// ❌ No check: user.leagueMemberships.find(m => m.leagueId === id && !m.leftAt)

// If draft window is open but user isn't in league, what happens?
POST /drafts/:id/pick
// ❌ No check: Is leagueMemberId actually from this league?

// If picking driver from different season?
POST /drafts/:id/pick
// ❌ No check: Does driverId belong to season of this league?

// If two picks submitted simultaneously?
POST /drafts/:id/pick
// ❌ No lock mechanism - both could succeed

11. Missing Audit & Observability ⚠️ GAPS

Audit Logging

  • ❌ No audit log when league created/deleted
  • ❌ No audit log when user joins/leaves league
  • ❌ ⚠️ Audit log table exists but rarely populated
  • ✅ Auth logs account lockouts

Observability

  • ✅ Fastify logger used in handlers
  • ❌ No structured logging (no request IDs for tracing)
  • ❌ No performance metrics
  • ❌ No error rate metrics

Recommended Additions

// Create centralized audit logger
async function auditLog(userId, action, entityType, entityId, changes?) {
  await prisma.auditLog.create({
    data: { userId, action, entityType, entityId, changes }
  });
}

// Use in all mutations
async joinLeague(userId, leagueId) {
  const member = await prisma.leagueMember.create(...);
  await auditLog(userId, 'JOIN_LEAGUE', 'League', leagueId, { teamName });
}

12. API Endpoint Security Assessment

Public Endpoints (No Auth)

GET  /health                          ✅ OK (health check)
GET  /leagues                         ✅ OK (public leagues only)
GET  /leagues/:id                     ⚠️ Needs visibility check
GET  /leagues/:id/members             ⚠️ Leaks member list
GET  /join/:inviteToken               ✅ OK (token-based)
POST /join/:inviteToken               ✅ OK (requires auth)
GET  /users/vapid-public-key         ✅ OK (public key)

Protected Endpoints (Auth Required)

POST /auth/login                      ✅ Proper auth
POST /auth/register                   ✅ Rate limited (5/min)
POST /auth/refresh                    ⚠️ No CSRF token
POST /auth/logout                     ⚠️ No auth check applied!
GET  /users/me                        ✅ Auth required
PATCH /users/me                       ✅ Rate limited
POST /leagues                         ✅ Auth required

Admin Endpoints

GET  /admin/stats                     ⚠️ No auth check visible
GET  /admin/users                     ⚠️ No role check
POST /admin/scoring/calculate/:raceId ⚠️ No role check

13. Recommended Fix Priority

🔴 CRITICAL (Fix Immediately)

  1. Add input validation with Zod to all endpoints

    • Create DTOs for all CreateX/UpdateX operations
    • Auto-validate in request handlers

  2. Fix auth middleware - Apply to logout and admin endpoints

    • Add role-based authorization checks
    • Create @authorization('super_admin') decorator pattern

  3. Fix race conditions in draft picks and league joins

    • Wrap critical sections in transactions
    • Add optimistic locking if needed

  4. Add comprehensive business logic validation

    • User already in league?
    • Driver from correct season?
    • Draft window actually open?

🟡 HIGH (Fix This Sprint)

  1. Standardize controller patterns - Choose class-based OR function-based
  2. Add missing error codes for domain-specific errors
  3. Complete transaction coverage in critical paths
  4. Add pagination to all list endpoints
  5. Implement audit logging for all mutations
  6. Add correlation IDs for request tracing

🟢 MEDIUM (Next Sprint)

  1. Create comprehensive API documentation
  2. Add request/response validation tests
  3. Add concurrent operation tests
  4. Implement graceful degradation for external APIs
  5. Add metrics and alerting

14. Code Examples: Before & After

Example 1: League Creation

BEFORE (Current) ❌

// leaguesController.ts
async createLeague(request, reply) {
  try {
    const user = getAuthenticatedUser(request);
    const body = request.body as CreateLeagueInput; // No validation!
    const league = await this.leaguesService.createLeague(user.id, body);
    sendSuccess(reply, league, 201);
  } catch (error) {
    sendError(reply, error); // Generic error
  }
}

// leaguesService.ts
async createLeague(userId, input) {
  if (input.name.length < 3 || input.name.length > 80) {
    throw new Error('Invalid name'); // No error code
  }
  // ... manual validation scattered
}

AFTER (Fixed) ✅

// leagues.dto.ts
export const createLeagueSchema = z.object({
  name: z.string().min(3).max(80),
  seasonId: z.string().cuid(),
  scoringType: z.enum(['fia_official', 'linear_20', 'proprietary']).optional(),
  maxPlayers: z.number().int().min(2).max(11).optional(),
  // ... all fields with constraints
});
export type CreateLeagueInput = z.infer<typeof createLeagueSchema>;

// leaguesController.ts
async createLeague(request: FastifyRequest, reply: FastifyReply) {
  try {
    const user = getAuthenticatedUser(request);
    const input = createLeagueSchema.parse(request.body); // Validated
    const league = await this.leaguesService.createLeague(user.id, input);
    sendSuccess(reply, league, 201);
  } catch (error) {
    if (error instanceof z.ZodError) {
      sendError(reply, ApiError.validationError(error.errors));
    } else {
      sendError(reply, error);
    }
  }
}

// leaguesService.ts
async createLeague(userId: string, input: CreateLeagueInput) {
  // No re-validation needed - input is guaranteed valid
  
  // Just business logic
  const season = await this.prisma.season.findUniqueOrThrow({
    where: { id: input.seasonId },
  }).catch(() => {
    throw ApiError.notFound('Season');
  });
  
  const existingLeague = await this.prisma.league.findUnique({
    where: { seasonId_name: { seasonId: input.seasonId, name: input.name } },
  });
  
  if (existingLeague) {
    throw ApiError.conflict('League name already exists for this season');
  }
  
  // Create with transaction to ensure atomicity
  return await this.prisma.$transaction(async (tx) => {
    const league = await tx.league.create({ data: { ... } });
    const member = await tx.leagueMember.create({
      data: { leagueId: league.id, userId, teamName: defaultTeamName },
    });
    return transformLeagueResponse(league, 1, true);
  });
}

Example 2: Draft Pick Submission

BEFORE (Current) ❌

async submitPick(request, reply) {
  try {
    const user = getAuthenticatedUser(request);
    const { draftId } = request.params;
    const { driverId } = request.body;
    
    // No validation of driverId format
    // No check if user owns the draft pick slot
    
    const pick = await this.draftsService.submitPick(draftId, driverId);
    sendSuccess(reply, pick);
  } catch (error) {
    sendError(reply, error);
  }
}

AFTER (Fixed) ✅

// drafts.dto.ts
export const submitPickSchema = z.object({
  draftWindowId: z.string().cuid(),
  leagueMemberId: z.string().cuid(),
  driverId: z.string().cuid(),
});
export type SubmitPickInput = z.infer<typeof submitPickSchema>;

async submitPick(request: FastifyRequest, reply: FastifyReply) {
  try {
    const user = getAuthenticatedUser(request);
    const input = submitPickSchema.parse({
      ...request.body,
      draftWindowId: request.params.draftId,
    });
    
    // Verify user owns this league member record
    const leagueMember = await this.prisma.leagueMember.findUnique({
      where: { id: input.leagueMemberId },
    });
    
    if (leagueMember?.userId !== user.id) {
      throw ApiError.forbidden('You cannot submit picks for this league');
    }
    
    const pick = await this.draftsService.submitPick(input);
    sendSuccess(reply, pick);
  } catch (error) {
    if (error instanceof z.ZodError) {
      sendError(reply, ApiError.validationError(error.errors));
    } else {
      sendError(reply, error);
    }
  }
}

// drafts.service.ts
async submitPick(input: SubmitPickInput) {
  // Use transaction to prevent race condition
  return await this.prisma.$transaction(async (tx) => {
    // Fetch with lock
    const [draftWindow, existingPick, driver] = await Promise.all([
      tx.draftWindow.findUniqueOrThrow({
        where: { id: input.draftWindowId },
      }),
      tx.draftPick.findFirst({
        where: {
          draftWindowId: input.draftWindowId,
          driverId: input.driverId,
        },
      }),
      tx.driver.findUniqueOrThrow({
        where: { id: input.driverId },
      }),
    ]);
    
    // Validate state
    if (draftWindow.status !== 'open') {
      throw ApiError.badRequest('Draft window is not open', {
        status: draftWindow.status,
      });
    }
    
    if (existingPick) {
      throw ApiError.conflict('Driver already picked in this round', {
        pickedBy: existingPick.leagueMemberId,
      });
    }
    
    // Check if league member's turn
    const currentTurn = await this.getCurrentTurn(input.draftWindowId);
    if (currentTurn.leagueMemberId !== input.leagueMemberId) {
      throw ApiError.badRequest('Not your turn');
    }
    
    // Create pick
    const pick = await tx.draftPick.create({
      data: {
        draftWindowId: input.draftWindowId,
        leagueMemberId: input.leagueMemberId,
        driverId: input.driverId,
        round: currentTurn.round,
        pickOrder: currentTurn.pickOrder,
        submittedAt: new Date(),
      },
    });
    
    return pick;
  });
}

Summary Table: Health Indicators

Category Status Score Notes
Architecture ✅ Good 8/10 Clear layering, consistent patterns
Response Format ✅ Good 9/10 Standardized structure, minor gaps
Error Handling 🟡 Fair 6/10 Some inconsistencies, missing codes
Input Validation 🔴 Poor 3/10 Only auth module has Zod schemas
Authentication 🟡 Fair 6/10 Good tokens, missing auth checks
Authorization 🔴 Poor 2/10 Minimal role/permission checks
Data Integrity 🟡 Fair 6/10 Uses transactions, missing in some paths
Type Safety 🟡 Fair 5/10 TS everywhere, but interfaces not validated
Concurrency 🔴 Poor 3/10 Race conditions in draft/league ops
Consistency 🟡 Fair 5/10 Patterns vary across modules

Action Items Checklist

Week 1 (Critical)

  • Add Zod validation DTOs to all endpoints
  • Apply auth middleware to all protected routes
  • Fix draft picks race condition with transaction
  • Fix league joins with member count check

Week 2-3 (High Priority)

  • Standardize controller patterns across modules
  • Add authorization checks to admin endpoints
  • Implement audit logging for mutations
  • Add missing error codes and centralize error factory

Week 4+ (Medium Priority)

  • Add comprehensive API documentation
  • Add integration tests for concurrent operations
  • Implement request correlation IDs
  • Add metrics/monitoring

Generated: March 2, 2026
Reviewed By: API Audit Tool
Next Review: After fixes applied