[AmanKrSahu]

Executive Summary

This release branch merges verified Security Audit Logging (Task 2.23 / FR-2) and the Webhooks & Outbound Event System (Task 3.1 / FR-3) from the dev branch into main. The release establishes immutable audit trails across all critical authentication, session, and administrative lifecycles, and provides an enterprise-ready outbound webhook engine with cryptographic HMAC-SHA256 signature verification, SSRF protection, 24-hour dual-secret rotation grace windows, and automated exponential backoff retries.

All changes have undergone automated end-to-end integration testing, code formatting, static analysis, and type checking in simulated production environments. Merging this PR elevates AuthKit's enterprise readiness, compliance posture, and external platform integrability.

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Feature & Capabilities Scorecard

Feature Area	Task ID	Priority	Capability Details
Security Audit Logging	FR-2 (2.23)	P1	Centralized, asynchronous audit logging across 100% of mutation flows (Auth, MFA, OIDC, Sessions, Admin). Structured JSON metadata with automatic sensitive field sanitization.
Admin Audit Query API	FR-2 (2.23)	P1	High-throughput GET /api/v1/admin/audit-logs endpoint featuring cursor-based pagination and multi-dimensional filtering (userId, action, status, startDate, endDate).
Shared Event Catalog	FR-3 (3.1)	P1	Standardized domain event taxonomy covering 24 distinct event types with versioned envelopes (evt_<id>, type, version, timestamp, data) and wildcard * subscription matching.
Outbound Webhooks Delivery	FR-3 (3.1)	P1	Reliable HTTP dispatching with HMAC-SHA256 signature headers (X-Webhook-Signature: t=...,v1=...), configurable timeouts (5s), and response body truncation (10 KB max).
SSRF Guard & URL Safety	FR-3 (3.1)	P1	Active DNS resolution and IP validation blocking private IPv4/IPv6 ranges (RFC 1918, RFC 3927, Loopback, Link-Local) and cloud metadata endpoints prior to HTTP dispatch.
Dual-Secret Rotation	FR-3 (3.1)	P1	Zero-downtime secret rotation providing a 24-hour grace window where webhooks emit both v1 (current secret) and v1_old (previous secret) signatures.
Backoff Retries & Circuit Breaker	FR-3 (3.1)	P1	Exponential retry schedules (10s, 1m, 5m, 15m), Retry-After header parsing, automatic subscription disabling after 10 consecutive failures, and background queue worker recovery.
Admin Webhooks Management	FR-3 (3.1)	P1	Complete REST suite under /api/v1/admin/webhooks for subscription CRUD, secret rotation, live ping/test deliveries, and detailed delivery attempt audits.

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Database & Schema Migration

1. New Prisma Models & Indexes

Merging this release introduces three new database models:

• AuditLog: Stores immutable event records with composite indexes on userId, action, createdAt, and ipAddress.
• WebhookSubscription: Manages endpoint URLs, active event subscriptions, failure counters, and signing secrets (secret, previousSecret, previousSecretExpiresAt).
• WebhookDelivery: Tracks every webhook dispatch attempt, HTTP response status codes, latencies, error codes, and sanitized payload/response records.

2. Migration Execution

Run the following migration command during the production deployment pipeline:

pnpm prisma migrate deploy

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Documentation & API Artifacts Synchronization

• README.md: Updated feature capabilities and architecture descriptions to reflect audit logging and outbound webhook integrations.
• docs/api_endpoints.md: Expanded Section 7 (Admin) with comprehensive references for 7.4 Security Audit Logs (/admin/audit-logs) and 7.5 Webhooks (/admin/webhooks).
• Postman Collection (docs/api-specs/AuthKit.postman_collection.json): Added the Webhooks & Outbound Events request suite inside 08. Admin Controls & Role Management with automated test assertions.
• OpenAPI Specification (docs/api-specs/openapi.json): Exported complete OpenAPI 3.0 schemas, parameters, and response structures categorized under Admin - Audit Logs and Admin - Webhooks.
• Roadmap Tracker (docs/audit/2026-07-20/task.md): Updated Task 2.23 and Task 3.1 statuses to Done.

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QA & Sign-Off Verification

• Automated Test Suite: 20/20 test suites passed (93/93 tests passing) spanning unit, integration, SSRF security, and end-to-end live receiver tests.
• TypeScript Compilation: Compiled with 0 errors via pnpm type-check (tsc --noEmit).
• Code Quality & Style: Passed cleanly via pnpm lint (eslint) and pnpm format:check (prettier).
• Bundle Build: Verified successful production bundling via pnpm build (tsup + OpenAPI generation).