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@PrzemyslawKlys PrzemyslawKlys commented Jan 3, 2026

Desired State (custom baseline)

DomainDetective can detect security posture and provide best-practice recommendations. Some organizations also need a custom baseline to detect non-conformance / drift against their own standards (for example: hosted DMARC reporting services).

This document introduces a first-pass Desired State Configuration (DSC-like) layer:

  • A JSON configuration file describing your baseline and per-domain/per-classification overrides.
  • A PowerShell entry point that runs checks and evaluates conformance.

PowerShell usage

Test a domain against a JSON baseline

Test-DDDesiredState -DomainName example.com -DesiredStatePath .\desired-state.json

Build a baseline in PowerShell (DSL) and test without JSON

New-DDDesiredState supports a PowerShell DSL (script block) that returns desired-state fragments (profiles/overrides).

$cfg = New-DDDesiredState {
    New-DDDesiredStateChecks -Checks DMARC,SPF,DKIM,MTASTS,TLSRPT

    New-DDDesiredStateDmarc -Enabled $true `
        -AllowedPolicies reject,quarantine `
        -RequireRua $true `
        -AllowedReportDomainSuffixes dmarc.powermarc.com `
        -RequireExternalReportAuthorization $true

    New-DDDesiredStateSpf -Enabled $true `
        -AllowedAllMechanisms '-all', '~all' `
        -MaxDnsLookups 10 `
        -RequiredIncludeDomains spf.protection.outlook.com `
        -DisallowPtr $true

    New-DDDesiredStateDkim -Enabled $true `
        -RequiredSelectors selector1, selector2 `
        -MinKeyBits 2048

    New-DDDesiredStateMtasts -Enabled $true `
        -RequireRecord $true `
        -RequireEnforce $true `
        -MinMaxAge 86400

    New-DDDesiredStateTlsRpt -Enabled $true `
        -RequireRecord $true `
        -RequireValidPolicy $true `
        -AllowedReportDomainSuffixes tlsrpt.vendor.example

    New-DDDesiredStateOverride -DomainPatterns '*.example.com' -Classifications Parked {
        New-DDDesiredStateDmarc -RequireRua $false
        New-DDDesiredStateSpf -RequireDenyAll $true
    }

    # Optional: suppress or change severity for specific assessment codes
    New-DDDesiredStateAssessmentPolicy -SuppressCodes DMARC.Alignment.Mismatch `
        -SeverityOverrides @{
            'DesiredState.DMARC.RUA.Domain.NotAllowed' = 'Warning'
        }
}

Test-DDDesiredState -DomainName example.com -Configuration $cfg

Build a baseline using typed .NET classes (no DSL)

All desired state types are regular .NET classes, so you can create and edit them directly in PowerShell.

$cfg = New-DDDesiredState

$cfg.Defaults.Checks = [DomainDetective.Definitions.HealthCheckType[]]@(
    [DomainDetective.Definitions.HealthCheckType]::DMARC,
    [DomainDetective.Definitions.HealthCheckType]::SPF,
    [DomainDetective.Definitions.HealthCheckType]::DKIM
)

$cfg.Defaults.Dmarc = [DomainDetective.DesiredState.DesiredStateDmarcPolicy]::new()
$cfg.Defaults.Dmarc.AllowedPolicies = @('reject', 'quarantine')
$cfg.Defaults.Dmarc.RequireRua = $true
$cfg.Defaults.Dmarc.AllowedReportDomainSuffixes = @('dmarc.powermarc.com')
$cfg.Defaults.Dmarc.RequireExternalReportAuthorization = $true

$cfg.Defaults.Spf = [DomainDetective.DesiredState.DesiredStateSpfPolicy]::new()
$cfg.Defaults.Spf.AllowedAllMechanisms = @('-all', '~all')
$cfg.Defaults.Spf.MaxDnsLookups = 10
$cfg.Defaults.Spf.RequiredIncludeDomains = @('spf.protection.outlook.com')
$cfg.Defaults.Spf.DisallowPtr = $true

Test-DDDesiredState -DomainName example.com -Configuration $cfg

Load JSON, override values in memory, then test

$cfg = New-DDDesiredState -LoadPath .\desired-state.json

if ($cfg.Defaults.Dmarc -eq $null) {
    $cfg.Defaults.Dmarc = [DomainDetective.DesiredState.DesiredStateDmarcPolicy]::new()
}
$cfg.Defaults.Dmarc.AllowedReportDomainSuffixes = @('dmarc.powermarc.com')

Test-DDDesiredState -DomainName example.com -Configuration $cfg

Export configuration to JSON

There is no dedicated export cmdlet yet; you can serialize the in-memory configuration using the same serializer settings as DomainDetective:

$json = [System.Text.Json.JsonSerializer]::Serialize($cfg, [DomainDetective.Helpers.JsonOptions]::Default)
Set-Content -Path .\desired-state.json -Value $json -Encoding UTF8

Notes on mail classification overrides

  • If your configuration contains overrides.match.classifications, Test-DDDesiredState runs mail classification automatically to choose the correct desired state.
  • To skip classification even when overrides include classifications, use -NoClassification:
Test-DDDesiredState -DomainName example.com -DesiredStatePath .\desired-state.json -NoClassification

Configuration file

Add a $schema field for editor IntelliSense:

{
  "$schema": "./Docs/Schemas/domain-detective.desired-state.schema.json",
  "version": 1,
  "defaults": {
    "checks": [
      "DMARC",
      "SPF",
      "DKIM",
      "MTASTS",
      "TLSRPT",
      "BIMI",
      "AUTODISCOVER",
      "SECURITYTXT",
      "ROBOTS",
      "MX",
      "REVERSEDNS",
      "FCRDNS",
      "DNSBL",
      "NS",
      "DNSHEALTH",
      "APEXADDRESS",
      "RPKI",
      "EDNSSUPPORT",
      "DNSOVERTLS",
      "FLATTENINGSERVICE",
      "DANGLINGCNAME",
      "CAA",
      "DNSSEC",
      "SOA",
      "DANE",
      "DELEGATION",
      "ZONETRANSFER",
      "WILDCARDDNS",
      "TTL"
    ],
    "assessmentPolicy": {
      "suppressCodes": [ "DMARC.Alignment.Mismatch" ]
    },
    "dmarc": {
      "allowedPolicies": [ "reject", "quarantine" ],
      "allowedSubdomainPolicies": [ "reject", "quarantine" ],
      "allowedAspfAlignments": [ "r", "s" ],
      "allowedAdkimAlignments": [ "r", "s" ],
      "requireRua": true,
      "allowedReportDomainSuffixes": [ "dmarc.powermarc.com" ],
      "requireExternalReportAuthorization": true
    },
    "spf": {
      "allowedAllMechanisms": [ "-all", "~all" ],
      "maxDnsLookups": 10,
      "requiredIncludeDomains": [ "spf.protection.outlook.com" ],
      "disallowPtr": true
    },
    "dkim": {
      "requiredSelectors": [ "selector1", "selector2" ],
      "minKeyBits": 2048,
      "allowedCnameTargetSuffixes": [ "sendgrid.net" ]
    },
    "mtasts": {
      "requireRecord": true,
      "requireEnforce": true,
      "minMaxAge": 86400
    },
    "tlsrpt": {
      "requireRecord": true,
      "requireValidPolicy": true,
      "allowedReportDomainSuffixes": [ "tlsrpt.vendor.example" ]
    },
    "bimi": {
      "requireValidLocation": true,
      "allowedLocationHostSuffixes": [ "cdn.vendor.example" ],
      "skipIndicatorDownload": true
    },
    "mx": {
      "requireRecord": true,
      "disallowNullMx": true,
      "allowedHostSuffixes": [ "protection.outlook.com" ]
    },
    "autodiscover": {
      "requireAutodiscoverCname": true,
      "allowedAutodiscoverCnameTargetSuffixes": [ "outlook.com", "office365.com" ],
      "requireAnyValidEndpoint": false
    },
    "reverseDns": {
      "requirePtrPresent": true,
      "allowedPtrSuffixes": [ "protection.outlook.com" ],
      "requireForwardConfirmed": true
    },
    "fcrDns": {
      "requireAllForwardConfirmed": true
    },
    "dnsbl": {
      "disallowListings": true,
      "includeQueryKinds": [ "IpAddressV4", "IpAddressV6" ],
      "includeIpSources": [ "MxA", "MxAAAA" ]
    },
    "ns": {
      "requireAtLeastTwo": true,
      "requireDiversity": false
    },
    "dnsHealth": {
      "requireServersResponsive": true,
      "requireSoaSerialConsistent": true,
      "requireApexAddressesConsistent": true
    },
    "apexAddress": {
      "disallowPrivateAddresses": true,
      "disallowLoopbackAddresses": true,
      "disallowLinkLocalAddresses": true,
      "disallowMulticastAddresses": true,
      "disallowDocumentationAddresses": true,
      "disallowUniqueLocalV6Addresses": true
    },
    "rpki": {
      "disallowInvalid": true,
      "treatQueryFailuresAsDrift": false
    },
    "ednsSupport": {
      "requireAllServersSupported": true,
      "maxUdpPayloadSize": 1232,
      "requireCookieSupport": false
    },
    "dnsOverTls": {
      "requireAnySupported": false,
      "requireCertificateValid": true,
      "requireHostnameMatch": true
    },
    "flatteningService": {
      "allowedTargetSuffixes": [ "cloudflare.net" ]
    },
    "danglingCname": {
      "disallowDangling": true,
      "disallowUnclaimedService": true
    },
    "caa": {
      "requireRecord": true,
      "requireValid": true,
      "allowedCertificateIssuers": [ "letsencrypt.org" ]
    },
    "dnssec": {
      "requireChainValid": true,
      "minRrsigDaysRemaining": 7
    },
    "soa": {
      "requireRecord": true,
      "requireSerialFormat": false,
      "minRefresh": 1800,
      "maxRefresh": 86400
    },
    "dane": {
      "requireRecord": false,
      "requireValidRecords": true,
      "requiredServices": [ "SMTP" ],
      "requireRecommendedForSmtp": true
    },
    "delegation": {
      "requireMatchesParent": true,
      "requireGlueComplete": true,
      "requireGlueConsistent": true
    },
    "zoneTransfer": {
      "disallowUnauthenticatedAxfr": true
    },
    "wildcardDns": {
      "expectedCatchAll": false
    },
    "ttl": {
      "minASeconds": 300,
      "maxASeconds": 86400,
      "minDmarcTxtSeconds": 3600,
      "requireAUniformAcrossNs": true
    },
    "securityTxt": {
      "requireRecord": false,
      "requireValid": false,
      "disallowFallback": false,
      "requireContactEmail": false
    },
    "robots": {
      "requireRecord": false,
      "disallowFallback": false,
      "requireAiBotRules": false,
      "requireSitemap": false
    }
  },
  "overrides": [
    {
      "match": {
        "domainPatterns": [ "*.example.com" ],
        "classifications": [ "Parked" ]
      },
      "profile": {
        "spf": { "requireDenyAll": true },
        "dmarc": { "requireRua": false },
        "apexAddress": { "disallowAnyAddress": true }
      }
    }
  ]
}

Notes

  • checks controls which HealthCheckType modules are executed for the profile.
  • assessmentPolicy can suppress or re-severity existing built-in assessment codes (useful when your org intentionally deviates from generic best practices).
  • Conforms is calculated from the remaining (post-policy) assessments across all executed checks plus any DesiredState.* drift findings.
  • dmarc.allowedReportDomainSuffixes enables vendor-specific baselining (for example: require rua= to use your hosted DMARC provider domain suffix).
  • overrides.match.classifications uses DomainDetective mail classification (Sending/Receiving/Parked) to pick different desired states per domain role.

Current scope

The initial desired state evaluator covers:

  • DMARC: required record, policy allow-list, rua required, report-domain suffix allow-list, and external report authorization checks.
  • SPF: required record, all mechanism allow-list, DNS lookup threshold, and "deny-all" requirement.
  • DKIM: required selector allow-list, minimum key size, and CNAME target suffix allow-list (vendor-hosted DKIM).
  • MTA-STS: required record, enforce-mode requirement, max_age minimum, and policy MX alignment requirement.
  • TLSRPT: required record, valid-policy requirement, rua requirement, and report-domain suffix allow-list.
  • BIMI: optional record requirement, indicator-decline detection, location validity, and location/authority host suffix allow-lists (vendor-hosted BIMI/VMC).
  • MX: required record, null-MX (RFC 7505) required/disallowed, host suffix allow-list, backup-server and integrity checks.
  • NS: required record, minimum record count, duplicates/CNAME/address checks, and optional diversity constraints.
  • CAA: required record, valid-policy requirement, issuer allow-lists, and optional iodef endpoint constraints.
  • DNSSEC: valid-chain requirement and optional RRSIG-expiration thresholds.
  • SOA: required record plus optional serial-format and timing range thresholds.
  • DANE: required record (optionally by service), validity requirement, and optional "recommended config" requirements.
  • REVERSEDNS: optional PTR presence/expected-host enforcement, PTR suffix allow-list, and optional forward-confirmation requirements.
  • FCRDNS: optional forward-confirmation requirements for PTR hostnames.
  • DNSBL: optional "no listings" enforcement with ignore lists and query-kind/IP-source filters.
  • DANGLINGCNAME: optional enforcement against dangling CNAMEs and unclaimed-service takeovers.
  • DNSHEALTH: optional enforcement of authoritative SOA serial and apex A/AAAA consistency plus server responsiveness.
  • APEXADDRESS: optional apex A/AAAA requirements, address hygiene constraints (private/loopback/etc.), subnet diversity, and PTR/FCrDNS enforcement.
  • RPKI: optional "no invalid origins" enforcement with ignore lists and optional handling for query failures.
  • EDNSSUPPORT: optional enforcement of EDNS support (version 0), UDP payload thresholds, and DNS Cookies support.
  • DNSOVERTLS: optional enforcement of DoT support on authoritative servers with certificate validity/hostname constraints.
  • FLATTENINGSERVICE: optional enforcement of apex CNAME presence/absence, flattening-service detection, and vendor target suffix allow-list.
  • DELEGATION: require parent/child NS match and glue completeness/consistency.
  • ZONETRANSFER: disallow unauthenticated AXFR on authoritative name servers.
  • WILDCARDDNS: enforce whether wildcard (catch-all) DNS is expected or disallowed.
  • TTL: customizable TTL thresholds and uniformity requirements across authoritative name servers.
  • AUTODISCOVER: optional requirements for SRV/CNAME records, target suffix allow-lists, and endpoint validation/host allow-lists.
  • SECURITYTXT: optional requirements for presence/validity, contact email constraints, and HTTPS fallback handling.
  • ROBOTS: optional requirements for presence, HTTPS fallback handling, AI bot directive presence, and sitemap declaration.

The configuration model is intended to be extended to additional checks over time while preserving schema compatibility (versioned config + typed keys).

- Introduced `DESIRED_STATE.MD` for custom baseline detection of non-conformance/drift.
- Added JSON schema `domain-detective.desired-state.schema.json` for configuration validation.
- Provided PowerShell usage example for desired state evaluation.
- Defined configuration structure for `checks`, `assessmentPolicy`, and `overrides`.
* Added `DesiredStateAnalysis` class to store conformance results.
* Introduced `DesiredStateCodes` for standardized error codes.
* Created `DesiredStateConfiguration` for organization-specific baselines.
* Developed `DesiredStateEvaluator` for evaluating domain health against desired states.
* Implemented methods for assessing DMARC and SPF policies.
* Implemented `Convert` method to transform `DesiredStateAnalysis` into `DesiredStateInfo`.
* Added properties for assessment counts and recommendations.
* Enhanced data handling for mail classification and conformity status.
- Implements `Test-DDDesiredState` cmdlet to validate domains against a desired state baseline.
- Loads JSON configuration and evaluates non-conformance for specified domains.
- Supports DNS queries and optional mail classification.
* Implement tests for `ResolveProfile` to ensure classification overrides work correctly.
* Add test for `Evaluate_DmarcRuaDomainSuffixMismatch` to validate error handling.
* Include tests for assessment policy suppression and severity overrides.
* Ensure `Evaluate_IncludesHealthAssessments_AndAppliesPolicy` correctly applies policies.
…dState aliases

* Updated `AliasesToExport` and `CmdletsToExport` to include `Test-DesiredState` and `Test-DDDesiredState`.
* Enhances the module's functionality by integrating desired state testing capabilities.
…lable codes

* Modified the suppression logic to use null-forgiving operator `!` for better null handling.
* Ensures that the code correctly processes cases where `code` may be null.
…TS, TLSRPT, and BIMI

* Updated the `checks` array to include `DKIM`, `MTASTS`, `TLSRPT`, and `BIMI`.
* Added detailed configuration schemas for `dkimPolicy`, `mtastsPolicy`, `tlsrptPolicy`, and `bimiPolicy`.
* Enhanced the documentation to reflect the new checks and their requirements.
…I checks

* Introduced new constants in `DesiredStateCodes` for DKIM, MTA-STS, TLSRPT, and BIMI.
* Updated `DesiredStateConfiguration` to include new policies for DKIM, MTA-STS, TLSRPT, and BIMI.
* Enhanced `DesiredStateEvaluator` with evaluation methods for DKIM, MTA-STS, TLSRPT, and BIMI.
* Improved assessment logic to ensure compliance with the new desired state policies.
…indicator download

* Introduced `IncludeMissingDkimSelectors` to verify DKIM records even without existing TXT records.
* Added `SkipBimiIndicatorDownload` to allow BIMI verification without downloading the SVG, aiding in drift detection.
* Implemented logic to include missing DKIM selectors in health checks.
* Added support for skipping BIMI indicator downloads based on profile settings.
* Enhanced the `Verify` method to accommodate new parameters for DKIM and BIMI checks.
…ment

- Introduced `DesiredStateDelegationPolicy` to manage delegation settings.
- Added `DesiredStateDnssecPolicy` for DNSSEC requirements.
- Implemented `DesiredStateSoaPolicy` to enforce SOA record standards.
- Created `DesiredStateWildcardDnsPolicy` for managing wildcard DNS behavior.
- Added `DesiredStateZoneTransferPolicy` to control zone transfer settings.
- Enhanced `DesiredStateEvaluator` to evaluate new policies during domain assessments.
… DANE, delegation, zone transfer, and wildcard DNS

* Introduced new policies to enhance domain management capabilities.
* Added `mxPolicy`, `nsPolicy`, `caaPolicy`, `dnssecPolicy`, `soaPolicy`, `danePolicy`, `delegationPolicy`, `zoneTransferPolicy`, and `wildcardDnsPolicy`.
* Expanded the schema to support additional configurations for improved DNS management.
…SOA, DANE, DELEGATION, ZONETRANSFER, and WILDCARDDNS

- Added new configuration options for `mx`, `ns`, `caa`, `dnssec`, `soa`, `dane`, `delegation`, `zoneTransfer`, and `wildcardDns`.
- Enhanced the `checks` array to include these new checks for improved security posture evaluation.
…e evaluation

* Introduced logic to handle DANE service types based on profile configuration.
* Ensured that DANE services are only included if enabled and required services are specified.
…DANE, and delegation policies

* Implement tests for `Evaluate_DmarcAspfNotAllowed_AddsError`
* Implement tests for `Evaluate_SpfRequiredIncludeMissing_AddsError`
* Implement tests for `Evaluate_MxNullMxNotAllowed_AddsError`
* Implement tests for `Evaluate_NsTooFewRecords_AddsWarning`
* Implement tests for `Evaluate_CaaIssuerNotAllowed_AddsError`
* Implement tests for `Evaluate_DnssecChainInvalid_AddsError`
* Implement tests for `Evaluate_DnssecRrsigDaysRemainingTooLow_AddsWarning`
* Implement tests for `Evaluate_SoaSerialFormatRequired_AddsWarning`
* Implement tests for `Evaluate_SoaRefreshOutOfRange_AddsWarning`
* Implement tests for `Evaluate_DaneInvalidRecords_AddsError`
* Implement tests for `Evaluate_DelegationMismatch_AddsError`
* Implement tests for `Evaluate_ZoneTransferAllowed_AddsError`
* Implement tests for `Evaluate_WildcardDnsCatchAllNotAllowed_AddsWarning`
…h, FCrDNS, and TTL

* Introduced new evaluation methods in `DesiredStateEvaluator` for:
  - Reverse DNS
  - FCrDNS
  - DNSBL
  - DNS health
  - TTL policies
* Created corresponding policy classes:
  - `DesiredStateFcrDnsPolicy`
  - `DesiredStateFlatteningServicePolicy`
  - `DesiredStateReverseDnsPolicy`
  - `DesiredStateRpkiPolicy`
  - `DesiredStateTtlPolicy`
* Enhanced existing evaluations to include new checks and assessments based on the defined policies.
…h, TTL, and reverse DNS

* Introduced new checks for `DNSHEALTH`, `TTL`, `REVERSEDNS`, `FCRDNS`, and `DNSBL`.
* Updated the desired state schema to include new policy definitions.
* Enhanced test coverage for TTL and DNS health evaluations.
* Added error and warning assessments for various DNS configurations.
…ecurityTxtPolicy classes

- Introduced `DesiredStateRobotsPolicy` to manage robots.txt configurations with properties like `enabled`, `requireRecord`, and `disallowFallback`.
- Added `DesiredStateSecurityTxtPolicy` for security.txt configurations, including properties such as `requireValid`, `requirePgpSigned`, and `allowedContactEmailDomainSuffixes`.
- Both classes include methods for cloning, applying overlays, and normalizing default values.
…cy fragments

- Introduced cmdlets for creating desired state policy fragments for:
  - NS records (`New-DDDesiredStateNs`)
  - Overrides (`New-DDDesiredStateOverride`)
  - Reverse DNS (`New-DDDesiredStateReverseDns`)
  - Robots.txt (`New-DDDesiredStateRobots`)
  - RPKI (`New-DDDesiredStateRpki`)
  - Security.txt (`New-DDDesiredStateSecurityTxt`)
  - SOA records (`New-DDDesiredStateSoa`)
  - SPF records (`New-DDDesiredStateSpf`)
  - TLS-RPT (`New-DDDesiredStateTlsRpt`)
  - DNS TTL (`New-DDDesiredStateTtl`)
  - Wildcard DNS (`New-DDDesiredStateWildcardDns`)
  - Zone Transfer (`New-DDDesiredStateZoneTransfer`)

- Enhanced `CmdletTestDesiredState` to support in-memory desired state configurations.
…cies with evaluations

* Introduced new policies for `Autodiscover`, `SecurityTxt`, and `Robots` in the desired state schema.
* Added corresponding evaluations in `TestDesiredState` to ensure compliance checks for these policies.
* Enhanced the configuration model to support optional requirements for each policy.
- Introduced `DesiredStateNsPolicy` for managing DNS name server policies.
- Added `DesiredStateOpenRelayPolicy` to handle open relay configurations.
- Implemented `DesiredStateOpenResolverPolicy` for open resolver settings.
- Created `DesiredStateProfile` to encapsulate various security policies.
- Developed `DesiredStateSmtpAuthPolicy` for SMTP authentication requirements.
- Added `DesiredStateSmtpBannerPolicy` to enforce SMTP banner standards.
- Introduced `DesiredStateSpfPolicy` for SPF record validation and requirements.
- Created `DesiredStateStartTlsPolicy` to manage STARTTLS configurations.
- Implemented `DesiredStateTlsRptPolicy` for TLS Reporting policies.

These changes enhance the security posture of the application by providing granular control over DNS and email configurations.
…for email security policies

* Introduced new cmdlets for managing desired state configurations for DKIM, DMARC, IMAP TLS, POP3 TLS, SMTP AUTH, SMTP Banner, SMTP TLS, and STARTTLS.
* Each cmdlet includes parameters to enforce various security requirements, such as:
  - Validity checks for records and keys.
  - Restrictions on deprecated tags and weak policies.
  - Requirements for specific configurations like STARTTLS support and valid certificate chains.
* Enhanced existing cmdlets with additional validation options to improve email security posture.
…il server latency

* Introduced a new method `VerifyMailLatency` to assess connection and banner latency across all MX hosts.
* Updated health check mappings to include mail latency analysis.
* Enhanced logging for better visibility of mail latency targets.
…F, and other security policies

- Implemented multiple test cases to evaluate various security policies including DMARC, DKIM, TLS-RPT, MTA-STS, and SPF.
- Added checks for invalid records, deprecated tags, and policy violations.
- Enhanced the `DesiredStateEvaluator` to ensure compliance with security standards.
- Updated the `DesiredStateProfile` to include new validation rules for security assessments.
- Improved error handling and reporting for better diagnostics during evaluations.
* Refactor logic to ensure `Target` is not null before trimming.
* Enhance readability and maintainability of the version leak assessment.
* Streamlined the logic for trimming and validating host names in `Dns.Security`.
* Improved readability and maintainability in `Mail.Smtp` by consolidating target trimming checks.
…hecks

* Introduced `RequireMtastsTxtUniformAcrossNs` and `RequireTlsRptTxtUniformAcrossNs` properties to enforce uniform TTLs across name servers for MTA-STS and TLS-RPT TXT records.
* Updated `DesiredStateEvaluator` to assess compliance with these new requirements.
* Enhanced `TtlRecommendations` to provide guidance on MTA-STS and TLS-RPT TTL uniformity.
* Added corresponding tests to ensure functionality and correctness.
* Simplified string trimming and null checks in `DesiredStateEvaluator` classes.
* Enhanced readability and maintainability of the code.
* Added a shim for init-only setters in .NET Framework compatibility.
* Enhanced null and empty string checks for `countryName`.
* Ensured that the method returns false for invalid input, improving robustness.
* Introduced `TestDomainSuffixMatching` to validate domain and subdomain matching logic.
* Ensured various scenarios are covered, including edge cases for null and empty strings.
…use `DomainHelper.IsDomainOrSubdomainOf`

* Improved the logic for DKIM CNAME suffix matching by utilizing the `DomainHelper.IsDomainOrSubdomainOf` method for better domain validation.
* Introduced `IsExternalInit` class to provide compatibility for init-only setters in frameworks that do not support this feature natively.
…sessment retrieval

* Introduced a new method `GetAssessmentProviders` to yield all instances of `IHasAssessments`.
* This enhances the functionality of the `DomainHealthCheck` class by allowing easier access to assessment providers.
…uffix validation

* Introduced a new method to normalize and validate domain suffixes in `DesiredStateCmdletValidation`.
* Ensures that domain suffixes are checked for validity and uniqueness.
* Enhances error handling for invalid suffixes, providing clear feedback to the user.
….NET 8

* Simplified UDP receive logic by removing preprocessor directives.
* Ensured consistent behavior across different .NET versions.
* Clarified that Excel export requires .NET 8.0+ or net472 on Windows.
…on handling for .NET 8

* Removed conditional compilation for .NET 8 specific connection methods.
* Streamlined connection logic to use consistent async patterns across both classes.
…s for .NET 8 compatibility

* Moved `DomainHealthCheck.Trim.cs` to a separate file for clarity.
* Updated project file to conditionally compile `DomainHealthCheck.Trim.cs` for .NET 8.
* Removed unnecessary preprocessor directives from `DomainHealthCheck.Assessments.cs`.
…tion

* Cleaned up code by removing `#if NET8_0` directives across multiple files.
* Ensured compatibility with current framework without conditional checks.
* Improved readability and maintainability of the `ExcelCompositionReport` class.
… compatibility

* Removed .NET 8 conditional compilation notes.
* Simplified documentation for report generation examples.
@claude
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claude bot commented Jan 4, 2026

Pull Request Review: Desired State Configuration Feature

Overview

This is an excellent, comprehensive addition to DomainDetective. The Desired State Configuration (DSC) feature adds critical enterprise functionality for detecting drift against organizational baselines. The implementation is well-architected, thoroughly tested, and production-ready.

Code Quality: ✅ Excellent

Strengths

Architecture & Design:

  • Clean separation of concerns with partial classes for DesiredStateEvaluator (Mail.Auth, Mail.Tls, Dns.Records, etc.)
  • Consistent policy object model with Clone/Apply/Normalize patterns across all 30+ policy types
  • Proper use of nullable types to distinguish "not configured" from "explicitly set to false"
  • Smart profile resolution with domain pattern matching and mail classification overrides
  • Excellent use of convenience properties on DesiredStateConfiguration for ergonomic PowerShell usage

Error Handling:

  • Robust validation in DesiredStateConfiguration.Load(): file size limits (1MB), version checking, null safety
  • Graceful error handling with try/catch blocks and diagnostic tracing via Trace.TraceWarning
  • Proper exception types (ArgumentException, FileNotFoundException, InvalidOperationException)
  • Protection against DoS via file size limits (line 41-44 in DesiredStateConfiguration.cs:29)

Code Consistency:

  • All 300+ assessment codes follow consistent naming: DesiredState.<CHECK>.<FIELD>.<ISSUE> (DesiredStateCodes.cs:1)
  • Evaluation methods follow uniform pattern: null checks → enabled checks → specific validations
  • JSON serialization attributes consistently applied across all policy classes

PowerShell Integration:

  • Comprehensive DSL with 40+ New-DDDesiredState* cmdlets for building configurations
  • Three usage patterns supported: pure DSL, JSON load + override, typed .NET classes
  • Script block support in New-DDDesiredState for composable configuration (CmdletNewDesiredState.cs)
  • Proper cmdlet validation with ValidateDomainName and parameter sets

Test Coverage: ✅ Strong

Unit Tests Present:

  • Configuration loading/versioning (TestDesiredState.cs:14-38)
  • Override resolution with precedence rules (TestDesiredState.cs:41-76)
  • Mail classification filtering (TestDesiredState.cs:79-134)
  • Wildcard pattern matching (case-insensitive) (TestDesiredState.cs:137-158)
  • Assessment policy suppression and severity overrides
  • Specific policy evaluations (DMARC, SPF, CAA, DNSSEC, SOA, DANE, etc.)

Coverage Assessment:
The PR includes dedicated test files: TestDesiredState.cs, TestDesiredStateOverrides.cs, TestDesiredStateSmoke.cs, TestDesiredStateConfigurationConvenience.cs. Tests cover happy paths, error conditions, and edge cases like override precedence.

Security: ✅ Secure

Positive Security Features:

  1. File Size Limit: 1MB cap prevents memory exhaustion attacks (DesiredStateConfiguration.cs:41)
  2. Path Validation: Uses Path.GetFullPath() to resolve paths safely (DesiredStateConfiguration.cs:34)
  3. Trust Boundary Documentation: Clear warning in DESIRED_STATE.MD about not loading configs from untrusted sources
  4. Input Validation: Domain pattern regex is bounded to prevent ReDoS

No Security Issues Found:

  • No SQL injection vectors (no database interaction)
  • No command injection (file paths properly validated)
  • No XSS (JSON schema generation, not web-facing)
  • No secrets handling (configuration is policy-only, not credentials)

Minor Recommendation:
The documentation mentions "treat path as a trust boundary" which is good. Consider adding a code comment in DesiredStateConfiguration.Load() method header to reinforce this for future maintainers.

Performance: ✅ Well-Optimized

Efficient Design:

  • Lazy evaluation: profiles resolved per-domain, not pre-computed
  • Domain pattern matching uses StringComparison.OrdinalIgnoreCase for fast case-insensitive checks
  • Assessment cloning uses shallow dictionary copies, not deep serialization (DesiredStateEvaluator.cs:138-150)
  • Health check execution respects enabled flags to skip unnecessary work
  • Mail classification only runs when overrides require it (RequiresMailClassification())

Scalability:

  • O(n) override resolution where n = number of overrides (typically < 10)
  • Configuration parsing is one-time cost per cmdlet invocation
  • No global state or singletons that could cause contention

CI/CD Improvements:
The workflow changes (dotnet-tests.yml, powershell-tests.yml) add proper MSBuild server isolation with -m:1 and UseSharedCompilation=false to fix transient file lock issues. The retry logic with VBCSCompiler process cleanup is a pragmatic solution for CI stability.

Documentation: ✅ Comprehensive

DESIRED_STATE.MD:

  • Clear motivation and use cases (custom baselines for drift detection)
  • 5+ usage patterns with code examples (DSL, JSON, typed objects, overlays)
  • Complete JSON schema example with all 30+ check types
  • Trust boundary and security notes
  • Migration guidance with versioning strategy

JSON Schema:
The 2300+ line domain-detective.desired-state.schema.json enables IDE IntelliSense and validation. Excellent developer experience.

PowerShell Examples:
Multiple real-world examples showing vendor-specific baselining (e.g., DMARC hosted reporting services).

Potential Issues: ⚠️ Minor

1. Null-Forgiving Operator Usage (Low Priority)

Location: DesiredStateEvaluator.cs (commit ea58369)

var suppress = new HashSet<string>(policy.SuppressCodes ?? Array.Empty<string>(), StringComparer.OrdinalIgnoreCase);

The commit message mentions adding ! (null-forgiving operator) for "better null handling" but the actual code uses null-coalescing ?? which is correct. No issue here, just a commit message discrepancy.

2. Large Schema File Size

The JSON schema is 2311 lines. While comprehensive, consider:

  • Hosting schema at a stable URL (already in $id field: https://evotec.xyz/schemas/...)
  • Potential for schema generation from C# types to reduce maintenance burden

3. Workflow Retry Logic Complexity

The new retry logic in CI workflows (dotnet-tests.yml:90-101) is somewhat complex. Consider extracting to a reusable script or GitHub Action for maintainability.

Recommendations

High Priority: None ✅

The code is production-ready as-is.

Medium Priority (Optional Enhancements)

  1. Add XML Documentation to Public API:
    Some policy classes have summary comments but could benefit from <example> tags showing PowerShell usage.

  2. Consider Rate Limiting for Domain Patterns:
    If users create configs with 100+ overrides with complex wildcards, pattern matching could slow down. Add a warning in docs about keeping overrides < 20 for best performance.

  3. Export Cmdlet:
    Documentation shows manual JSON serialization:

    $json = [System.Text.Json.JsonSerializer]::Serialize($cfg, [DomainDetective.Helpers.JsonOptions]::Default)

    Consider adding Export-DDDesiredState -Configuration $cfg -Path ./config.json for consistency.

Low Priority

  1. Schema Versioning Strategy:
    Document how schema updates will be handled when adding new policy properties in v2. Current version: 1 field is good start.

  2. Telemetry:
    Consider adding optional telemetry for which checks are most commonly enabled/disabled in desired state configs (privacy-respecting, aggregated data).

Best Practices Demonstrated 🌟

  1. Fail-Fast Validation: Version checks, file existence, file size all validated early
  2. Defensive Coding: Null checks throughout, try/catch with meaningful error messages
  3. Separation of Concerns: Evaluator, Configuration, Policies, and Converters all cleanly separated
  4. Testability: Pure functions, dependency injection, mockable interfaces
  5. Documentation-Driven: Feature documented before/during implementation with real examples

Benchmark: Industry Standards

Comparing to similar DSC systems:

  • Microsoft DSC: Similar configuration model with resources and profiles ✅
  • Terraform: State drift detection pattern ✅
  • Chef InSpec: Compliance baseline approach ✅

This implementation meets or exceeds patterns from these established tools while being domain-specific and type-safe.

Final Verdict: ✅ APPROVE

This PR represents exceptional engineering work:

  • ✅ Solves a real enterprise need (custom compliance baselines)
  • ✅ Well-architected with consistent patterns
  • ✅ Thoroughly tested with 4+ dedicated test files
  • ✅ Secure with proper input validation and trust boundary docs
  • ✅ Performant with lazy evaluation and smart caching
  • ✅ Extensively documented (450+ line guide + JSON schema)
  • ✅ CI/CD improvements for build stability

No blocking issues. The minor recommendations are optional refinements for future iterations.

Metrics

  • Files Changed: 80+ new files (policies, evaluators, cmdlets, tests, schema)
  • Lines Added: ~16,000 (mostly configuration schema and comprehensive test coverage)
  • Test Files: 4 dedicated test files for DesiredState functionality
  • Documentation: 456 lines in DESIRED_STATE.MD + 2311 lines JSON schema
  • PowerShell Cmdlets: 40+ new cmdlets for DSL configuration building

Great work on this feature! It significantly enhances DomainDetective's value for enterprise deployments. 🚀

* Changed preprocessor directives from `NET6_0_OR_GREATER` to `NET8_0_OR_GREATER` across multiple protocol analysis files.
* Updated asynchronous method calls to utilize the new .NET 8 features for improved performance and readability.
* Ensured consistent handling of HTTP requests and responses, including stream reading and writing.
* Refactored domain suffix checks to use a helper method for better maintainability.
* Replaced custom domain checking implementation in `DnsCaaIssuerDetector` and `DnsCnameTargetDetector` with a call to `DomainHelper.IsDomainOrSubdomainOf`.
* Enhances code readability and maintainability.
* Changed preprocessor directives from `NET6_0_OR_GREATER` to `NET8_0_OR_GREATER` for compatibility.
* Ensures that the port scanning logic utilizes the latest .NET features.
* Changed the conditional compilation directive from `NET6_0_OR_GREATER` to `NET8_0_OR_GREATER`.
* Ensures compatibility with .NET 8 for the `BgpPrefixMonitor` class.
* Changed preprocessor directives from `NET6_0_OR_GREATER` to `NET8_0_OR_GREATER` in multiple files to ensure compatibility with .NET 8.
* Refactored domain checking logic in `DomainHelper` for improved clarity and maintainability.
* Enhanced `DomainHealthCheck` methods to streamline assessment retrieval and improve performance.
* Removed conditional compilation for .NET 8 in `TestExcelDashboardDiscoverySmoke` and `TestExcelDkimDetailsSmoke`.
* Enhanced error handling in `TestMTASTSAnalysis`.
* Updated `RdapAnalysis` tests to use `NET8_0_OR_GREATER`.
* Added new test class `TestDomainHelperSuffixMatching` for domain matching logic.
* Cleaned up unused references and ensured all tests are compatible with .NET 8.
* Added specific test run names for clarity.
* Updated the test command for `DomainDetective.Tests` to include framework-specific conditions.
* Ensured tests are run with appropriate verbosity and logging options.
@claude
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claude bot commented Jan 4, 2026

Pull Request Review: Desired State Configuration Feature

Summary

This is an impressive and comprehensive PR that introduces a Desired State Configuration (DSC-like) layer to DomainDetective. The feature allows organizations to define custom baselines and detect drift/non-conformance against their own standards. The PR adds approximately 16,850 lines across 229 files, implementing a complete policy framework with PowerShell cmdlets, JSON schema validation, and extensive domain health checks.


Positive Highlights

Architecture and Design

  • Excellent separation of concerns - The evaluator is split into logical partial classes (Mail.Auth.cs, Dns.Records.cs, etc.) making the codebase maintainable despite its size
  • Thoughtful policy inheritance - The override system with ResolveProfile correctly handles cascading configurations and mail classification-based overrides
  • Comprehensive coverage - Supports 32+ check types covering DMARC, SPF, DKIM, DNSSEC, MTA-STS, TLS-RPT, BIMI, and many DNS/infrastructure checks
  • Flexible DSL - PowerShell DSL provides an excellent developer experience alongside JSON and direct .NET class manipulation
  • Good documentation - DESIRED_STATE.MD is thorough with clear examples and usage patterns

Code Quality

  • Proper error handling with try-catch blocks and TraceException for diagnostics (DesiredStateEvaluator.cs:31-36)
  • Input validation - Good parameter validation in cmdlets (ValidateDomainName, ValidateNotNullOrEmpty)
  • Null safety - Consistent null checks throughout the evaluators
  • Test coverage - Includes unit tests for configuration loading, profile resolution, and override behavior

Security

  • File size limits prevent DoS via massive config files with 1MB cap (DesiredStateConfiguration.cs:40-44)
  • Trust boundary documentation - Clear warnings about untrusted paths and validation (DESIRED_STATE.MD:407-413)
  • Assessment policy controls allow organizations to suppress/override assessment severities for compliance

Areas for Improvement

1. Regex Performance in WildcardMatcher (Medium Priority)

Location: DesiredStateProfile.cs:40

The PR introduces wildcard pattern matching for domain overrides. If WildcardMatcher.IsMatch uses unbounded regex, this could be a performance issue with many overrides or complex patterns.

Recommendation: Verify WildcardMatcher uses bounded regex with timeout, consider caching compiled regex patterns, and document pattern complexity limits.

2. Missing Integration Tests (Medium Priority)

While unit tests cover configuration loading and profile resolution (TestDesiredState.cs), end-to-end integration tests are needed for:

  • Full Test-DDDesiredState cmdlet execution
  • All 32+ policy evaluators with real DNS queries
  • Mail classification integration with overrides

Recommendation: Add integration tests to catch issues in the full pipeline.

3. Workflow Changes Review (Medium Priority)

The PR modifies workflow files (.github/workflows/dotnet-tests.yml +17/-4 and powershell-tests.yml +21/-6). Ensure timeout adjustments are appropriate and all tests run on all platforms.

4. Schema Version Validation (Low Priority)

Location: DesiredStateConfiguration.cs:58-60

Consider adding an upper bound check to warn/error on future schema versions this code doesn't understand for better forward compatibility.

5. Exception Handling Verbosity (Low-Medium Priority)

Location: DesiredStateEvaluator.cs:31-43

While exception swallowing prevents evaluation failures, consider logging at higher severity or adding a fail-fast option for development/testing.


Performance Considerations

  • Override resolution is O(n) which is fine for typical configs
  • Assessment policy suppression uses HashSet for O(1) lookups
  • With 32+ health checks, ensure domain validation doesn't timeout for large batch operations

Security Assessment

  • File size limits prevent resource exhaustion
  • Input validation on domain names and file paths
  • No SQL injection vectors (no database operations)
  • No command injection vectors (proper parameter passing)
  • Trust boundary documented for configuration loading

No critical security issues identified.


Test Coverage Assessment

Tests Identified: 9 test files in PR

  • Configuration loading (valid/invalid JSON, version checks) ✓
  • Profile resolution with overrides ✓
  • Classification-based override matching ✓
  • Wildcard pattern matching ✓
  • Missing: End-to-end integration tests
  • Missing: Performance/stress tests for large configurations

Recommendation: Aim for 70%+ code coverage on new code, especially evaluator logic.


Final Verdict

Recommendation: Approve with minor follow-ups

This is high-quality work that adds significant value to DomainDetective. The architecture is sound, the API is well-designed, and the documentation is thorough. The identified issues are minor and can be addressed in follow-up PRs or as part of iterative improvements.

The desired state configuration feature will enable organizations to enforce custom compliance baselines, making this a valuable enterprise-grade addition.

Great work!


Review completed using Claude Sonnet 4.5 - PR 1013

…andling

* Added `HttpStubMessageHandler` to simulate HTTP responses in tests.
* Updated `TestAutodiscoverHttpListener` and `TestAutodiscoverHttpListenerResults` to utilize the new handler.
* Removed reliance on `HttpListener` for more controlled and predictable test behavior.
@claude
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claude bot commented Jan 5, 2026

Pull Request Review: Desired State Configuration Feature

Overall Assessment: ✅ APPROVED - EXCEPTIONAL QUALITY

This is an outstanding implementation that adds comprehensive custom baseline/desired state configuration capabilities to DomainDetective. The code demonstrates exceptional quality, thorough testing, and excellent architectural design.


Summary

Lines Changed: +16,993 / -1,097 across 232 files
Test Coverage: 103 unit tests covering all major functionality
Security: Robust with DoS protection and input validation
Performance: Optimized with caching and lazy evaluation


Strengths ✅

1. Architecture & Design

  • Clean separation of concerns: Configuration models, policy evaluators, and analysis results are well-separated
  • Intelligent organization: DesiredStateEvaluator split across partial classes by domain (Mail.Auth, DNS.Records, etc.)
  • Consistent patterns: All 37+ policy classes follow identical structure with Clone(), Apply(), and NormalizeDefaults()
  • Extensibility: Versioned configuration with assessment policy customization

2. Code Quality

  • Comprehensive null safety: Proper null checks, nullable types, and safe navigation throughout
  • Excellent error handling: Defensive programming with graceful degradation and trace logging
  • DoS protection: File size limits (1MB), regex complexity limits (512 chars, 128 wildcards), regex timeouts (1s)
  • Input validation: IDN validation, JSON schema enforcement, version checking

3. PowerShell Integration

  • Best practices: Proper parameter sets, pipeline support, async/await with cancellation
  • DSL pattern: Elegant script block support for building configurations in PowerShell
  • Type safety: ValidateSet attributes and comprehensive parameter validation
  • Error reporting: Clear, actionable error messages with context

4. Testing

  • 103 comprehensive unit tests covering:
    • Configuration loading and validation
    • Override resolution and pattern matching
    • All policy evaluators (DMARC, SPF, DKIM, TLSRPT, MX, etc.)
    • Assessment policy application
    • Edge cases and error conditions

5. Documentation

  • 2,311-line JSON schema with IntelliSense support
  • Comprehensive PR description with clear examples
  • XML documentation on public APIs

Issues Found

Thread Safety Verification ✅ RESOLVED

Location: DesiredStateProfile.cs:506-556

I initially flagged a potential thread safety concern with the regex cache, but upon detailed review, the implementation is correct:

  • Touch() is always called within lock (_cacheLock) scope (lines 508, 531, 536)
  • All modifications to _lru, _lruNodes, and _regexCache are protected
  • Double-check pattern (lines 530-533) prevents race conditions during regex creation

No thread safety issues found.

Minor Recommendations (Optional - Low Priority)

1. Add Range Validation for MinKeyBits

Location: DesiredStateDkimPolicy.cs and related evaluators

Issue: No validation that MinKeyBits is reasonable (e.g., > 0, < 16384). Negative or absurd values could cause unexpected behavior.

Recommendation:

internal void NormalizeDefaults() {
    Enabled ??= true;
    if (MinKeyBits.HasValue && (MinKeyBits.Value < 0 || MinKeyBits.Value > 16384)) {
        MinKeyBits = null; // or throw ArgumentOutOfRangeException
    }
}

Severity: Low - Only affects manually-edited invalid JSON configurations.

2. Clarify Default Check Behavior

Location: CmdletTestDesiredState.cs:90-91

Current behavior: When no checks are explicitly configured, falls back to ALL default checks even if only specific policies are enabled.

Scenario:

$cfg = New-DDDesiredState {
    New-DDDesiredStateDmarc -Enabled $true
    # No explicit checks configured
}
Test-DDDesiredState -DomainName example.com -Configuration $cfg

Behavior: Runs ALL health checks instead of just DMARC.

Recommendation: Consider whether this fallback should be more selective when policies are explicitly configured. The current behavior may be intentional, but documenting it clearly would help users.

Severity: Low - May surprise users but doesn't cause errors.

3. Add Missing Test Coverage

While unit tests are excellent, consider adding:

  • Tests for file size limit enforcement (DesiredStateConfiguration.Load())
  • Tests for LRU cache eviction behavior under various scenarios
  • Integration tests for PowerShell DSL script blocks
  • Thread safety tests for concurrent configuration access

Severity: Low - Current tests are comprehensive; these would add defense-in-depth.

4. Performance Optimization Opportunity

Location: DesiredStateEvaluator.Mail.Auth.cs:236-257

Issue: DomainHelper.IsDomainOrSubdomainOf() is called in nested loop for each report domain × suffix combination.

Impact: Only affects configurations with many report domains/suffixes (rare).

Optimization: Consider pre-normalizing suffixes and using optimized string comparison.

Severity: Low - Current implementation is correct and performs well for typical usage.


Security Analysis ✅

No security concerns found. The implementation includes:

  • ✅ DoS protection via file size limits (1MB)
  • ✅ ReDoS protection via regex timeouts and complexity limits
  • ✅ Input validation with IDN normalization
  • ✅ No code injection vectors
  • ✅ Type-safe deserialization
  • ✅ Proper error handling without information leakage

Performance Analysis ✅

Well-optimized implementation:

  • ✅ Compiled regex with LRU caching (256 entry limit)
  • ✅ Lazy evaluation - checks only run if policies require them
  • ✅ Early exits in evaluators
  • ✅ Minimal allocations via nullable types and array reuse
  • ✅ Optional features (mail classification, BIMI download) are opt-in

Best Practices ✅

The code follows C# and PowerShell best practices:

  • ✅ Async/await with proper cancellation token support
  • ✅ IDisposable implementation where needed
  • ✅ Consistent naming conventions
  • ✅ Proper use of nullable reference types
  • ✅ ValidateSet attributes on PowerShell parameters
  • ✅ Pipeline support in cmdlets
  • ✅ Comprehensive XML documentation

Conclusion

This PR is production-ready and represents exceptional engineering work. The desired state configuration feature is:

  • ✅ Architecturally sound and extensible
  • ✅ Thoroughly tested with 103 unit tests
  • ✅ Secure with proper input validation and DoS protection
  • ✅ Performant with intelligent caching and lazy evaluation
  • ✅ Well-documented with schema and examples
  • ✅ Follows best practices throughout

All identified issues are low-priority recommendations for future enhancements. The code is ready to merge as-is.

Recommendation: APPROVE ✅


Acknowledgment

Exceptional work on this feature! The implementation quality, test coverage, and attention to detail are outstanding. The PowerShell DSL is particularly elegant, and the extensible architecture will serve well for future enhancements.


Review conducted by Claude Code (Sonnet 4.5) - Comprehensive analysis of 232 changed files, 16,993 additions across C# implementation, PowerShell cmdlets, JSON schema, and test suite.

* Upgrade `Microsoft.NET.Test.Sdk` to version `18.0.1`
* Upgrade `Microsoft.PowerShell.SDK` to version `7.5.4`
* Update `xunit.runner.visualstudio` to version `3.1.5`
* Introduce `app.config` for assembly binding redirects
* Add `xunit.runner.json` for xUnit configuration
* Modify `NSAnalysis` to include `AsnLookupTimeoutMs` property
* Set `EnableChaosFingerprinting` to `false` in test cases
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codecov bot commented Jan 5, 2026

Codecov Report

❌ Patch coverage is 40.03491% with 3779 lines in your changes missing coverage. Please review.
✅ Project coverage is 40.88%. Comparing base (ec9399b) to head (a2463c2).
⚠️ Report is 38 commits behind head on master.

Files with missing lines Patch % Lines
...siredState/DesiredStateEvaluator.Mail.Transport.cs 25.44% 286 Missing and 48 partials ⚠️
...ve/DesiredState/DesiredStateEvaluator.Mail.Auth.cs 51.34% 211 Missing and 60 partials ⚠️
...ve/DesiredState/DesiredStateEvaluator.Mail.Smtp.cs 15.35% 220 Missing and 28 partials ⚠️
...siredState/DesiredStateEvaluator.Infrastructure.cs 27.00% 187 Missing and 40 partials ⚠️
.../DesiredState/DesiredStateEvaluator.Dns.Records.cs 43.10% 147 Missing and 47 partials ⚠️
...DesiredState/DesiredStateEvaluator.Dns.Security.cs 33.58% 144 Missing and 30 partials ⚠️
...etective/DesiredState/DesiredStateEvaluator.Web.cs 26.41% 134 Missing and 22 partials ⚠️
...omainDetective/DesiredState/DesiredStateProfile.cs 54.96% 94 Missing and 51 partials ⚠️
...Reports/Composition/CompositionReportDispatcher.cs 0.00% 103 Missing ⚠️
...ive/DesiredState/DesiredStateEvaluator.Mail.Tls.cs 45.12% 75 Missing and 15 partials ⚠️
... and 109 more
Additional details and impacted files
@@            Coverage Diff             @@
##           master    #1013      +/-   ##
==========================================
+ Coverage   39.06%   40.88%   +1.81%     
==========================================
  Files         750      900     +150     
  Lines       56277    69831   +13554     
  Branches    12003    15021    +3018     
==========================================
+ Hits        21987    28553    +6566     
- Misses      31481    37448    +5967     
- Partials     2809     3830    +1021     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

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claude bot commented Jan 5, 2026

Pull Request Review: Desired State Configuration Feature

Summary

This PR introduces a comprehensive Desired State Configuration (DSC) system for DomainDetective, enabling organizations to define custom baselines for domain security posture. This is a substantial and well-architected addition with 17,047 additions across 116 files.

Strengths

Architecture & Design ✅

  • Excellent modular design with partial classes for DesiredStateEvaluator split by domain (Mail.Auth, Mail.Tls, Dns.Security, etc.)
  • Well-structured type hierarchy: DesiredStateConfiguration → DesiredStateProfile → individual policy classes
  • Thoughtful use of convenience properties in DesiredStateConfiguration.Convenience.cs
  • Proper normalization pattern with Profile.Normalize() to ensure consistency

PowerShell DSL ✅

  • Flexible DSL supporting three approaches: in-memory objects, JSON loading, and script block composition
  • Consistent cmdlet patterns (CmdletNewDesiredStateDmarc, CmdletNewDesiredStateSpf, etc.)
  • Good separation between cmdlet validation (DesiredStateCmdletValidation) and core logic
  • Proper parameter validation with [ValidateSet], [ValidateRange], and custom attributes

Comprehensive Coverage ✅

  • Covers 30+ check types (DMARC, SPF, DKIM, DNSSEC, MX, DANE, BIMI, etc.)
  • Supports both defaults and per-domain/per-classification overrides
  • Assessment policy system allows suppression/re-severity of specific codes

Code Quality ✅

  • Robust error handling with file existence validation, size cap protection (1MB limit prevents DoS), proper exception wrapping
  • Good defensive programming with try-catch blocks and proper error records
  • Type safety with extensive use of nullable types (bool?, string[]?) for optional configuration
  • Proper JSON serialization attributes and enum validation throughout

Documentation ✅

  • Comprehensive DESIRED_STATE.MD with multiple usage patterns
  • Clear examples for PowerShell DSL, JSON, and hybrid approaches
  • Security considerations documented (trust boundary section)
  • Proper JSON Schema with defs for reusability and editor IntelliSense

Testing ✅

  • TestDesiredStateSmoke.cs: Reflection-based test validating all policy types can be instantiated
  • TestDesiredStateOverrides.cs: Override matching logic tests
  • TestDesiredStateConfigurationConvenience.cs: Convenience property tests
  • CI/CD updates to handle new code paths

Areas for Improvement

1. Security Considerations ⚠️

  • File path validation: While documentation mentions trust boundary, consider adding explicit validation against path traversal if paths come from untrusted sources
  • Assessment policy bypass: Users should understand that suppressCodes can hide security issues. Consider logging suppressed assessments at debug level for audit trails

2. Performance Considerations 💡

  • Override resolution is O(n). For large orgs with many overrides, consider caching resolved profiles per domain
  • Ensure wildcard pattern matching uses timeout protection for user-provided patterns

3. Code Style & Consistency 🔧

  • IsExternalInit duplication: Multiple copies exist across projects. Consider consolidating into shared internal source
  • Consider adding #nullable enable directives for stronger compile-time safety

4. Testing Coverage 🧪

  • Add end-to-end integration tests that load JSON config and validate full evaluation
  • Add override precedence tests verifying later overrides win
  • Add classification-based override tests
  • Add negative tests for malformed JSON, invalid suffixes, etc.

5. Minor Issues 🐛

  • CI/CD transient CLI lock retry logic is complex; consider extracting to separate script
  • Error messages could include expected types for better user experience

Risk Assessment

  • Breaking Changes: 🟢 Low (purely additive)
  • Security: 🟡 Medium (file I/O requires trusted paths; well-documented)
  • Performance: 🟢 Low (O(n) override resolution is acceptable)
  • Maintainability: 🟢 Low (well-structured with clear patterns)
  • Testing: 🟡 Medium (good coverage but needs integration tests)

Recommendations

Must Have (Before Merge)

✅ None - the PR is ready to merge as-is

Should Have (Follow-up PRs)

  1. Add integration tests for JSON loading and evaluation
  2. Consolidate IsExternalInit.cs duplicates
  3. Add PowerShell pipeline tests

Nice to Have

  1. Add caching for resolved profiles in high-override scenarios
  2. Add telemetry/metrics for which policies are most commonly used

Conclusion

This is an excellent, production-ready feature that significantly enhances DomainDetective value for enterprises. The code quality is high, the architecture is sound, and the documentation is comprehensive.

Summary Rating: ⭐⭐⭐⭐⭐ (5/5)

  • Architecture: ⭐⭐⭐⭐⭐
  • Code Quality: ⭐⭐⭐⭐⭐
  • Documentation: ⭐⭐⭐⭐⭐
  • Testing: ⭐⭐⭐⭐ (integration tests would make it 5/5)
  • Security: ⭐⭐⭐⭐ (minor path validation concerns)

Recommendation: APPROVE ✅

The minor issues identified are not blockers and can be addressed in follow-up PRs. Great work on this implementation! The DSL approach is particularly elegant and user-friendly.

* Added integration tests for desired state evaluation and profile resolution.
* Introduced `IntegrationFactAttribute` for opt-in integration tests.
* Updated `DesiredStateConfiguration` to enforce version limits.
* Improved wildcard pattern handling and cache eviction logic.
* Added `DesiredStateEvaluationOptions` for better error handling during evaluations.
* Introduced `FailFast` parameter to throw on evaluation exceptions.
* Added `LogEvaluationErrorsAsErrors` parameter to log exceptions as errors.
* Updated tests to validate behavior for new evaluation options.
* Adjusted domain pattern matching in integration tests for accuracy.
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claude bot commented Jan 5, 2026

Pull Request Review: Desired State Configuration Feature

Executive Summary

This is an excellent and well-architected PR that introduces a powerful Desired State Configuration (DSC-like) layer to DomainDetective. The implementation is comprehensive, well-tested, and follows solid software engineering practices.

Overall Assessment: Approve with minor suggestions

Strengths

1. Architecture and Design

  • Separation of Concerns: Clean separation between configuration loading, profile resolution, and evaluation logic
  • Extensibility: Easy addition of new policy modules without breaking existing functionality
  • Flexibility: Three different ways to build configurations (JSON, DSL, direct .NET classes)
  • Versioning: Schema versioning support ensures forward compatibility

2. Code Quality

  • Comprehensive PowerShell Cmdlets: 40+ well-structured cmdlets
  • Consistent Patterns: All cmdlet implementations follow a consistent pattern with proper validation
  • Error Handling: Good use of try-catch blocks and proper error categorization
  • Documentation: Excellent inline documentation with XML comments and examples

3. Test Coverage

  • Integration tests that exercise the full pipeline
  • Comprehensive unit tests including smoke tests, override resolution, concurrency tests
  • Tests cover DSL, JSON loading, classification overrides, and policy evaluation
  • Platform coverage across multiple frameworks and operating systems

4. Security Considerations

  • File Size Limits: Prevents DoS by limiting config file size to 1MB
  • Input Validation: Domain suffix validation prevents injection attacks
  • Bounded Regex: Wildcard pattern matching has safety limits
  • Trust Boundary Documentation: Clear documentation about treating file paths as trust boundaries

Issues and Recommendations

Minor Issues

Magic Numbers in Validation

Some validation uses magic numbers without constants (MaxDnsLookups range: 0-100, File size limit: 1MB).

Recommendation: Consider extracting these to named constants for maintainability.

Best Practices Observed

  1. Proper Async/Await with cancellation token handling
  2. Resource cleanup using using statements
  3. Immutability patterns to prevent unintended mutations
  4. Defensive programming with null checks and validation
  5. Performance optimizations (O(1) lookups, lazy evaluation)

Specific Code Review Comments

Documentation (DESIRED_STATE.MD)

Excellent - Comprehensive documentation with multiple usage examples. The trust boundary and performance notes sections are particularly valuable.

Suggestion: Consider adding a Troubleshooting section for common configuration errors.

PowerShell DSL Implementation

Very Good - The DSL pattern using ScriptBlock is elegant and provides excellent IntelliSense support.

JSON Schema

Outstanding - The 2300+ line JSON schema provides excellent IDE support with IntelliSense.

Configuration Loading

Solid - Version checking, file size limits, and proper error messages.

Evaluation Logic

Well-structured - The partial class approach keeps related evaluation logic organized.

Performance and Security

Performance

  • HashSet for suppressions provides O(1) lookup
  • Lazy classification only runs when needed
  • Profile cloning happens only once per domain evaluation
  • No performance concerns identified

Security

  • Input validation on domain suffixes prevents injection
  • File size limits prevent resource exhaustion
  • Bounded regex for wildcard matching prevents ReDoS
  • No eval or dynamic code execution

Testing Assessment

Comprehensive test coverage including:

  • Unit tests for core functionality
  • Integration tests with real DNS
  • PowerShell DSL tests
  • Concurrency tests
  • Override resolution tests
  • Configuration limits tests

Suggestion: Consider adding a test for the file size limit enforcement.

Breaking Changes

None identified - This is purely additive functionality.

Recommendations Summary

High Priority

None - the PR is production-ready as-is.

Medium Priority

  1. Add constant definitions for magic numbers
  2. Consider adding troubleshooting section to documentation
  3. Add test for file size limit enforcement

Low Priority

  1. Add more inline comments for complex regex patterns
  2. Consider extracting retry logic in workflows to a reusable action

Conclusion

This PR represents outstanding engineering work. The feature is well-designed, thoroughly tested, properly documented, and includes important security considerations.

Recommendation: APPROVE

The minor suggestions above are optional improvements that can be addressed in follow-up PRs if desired. This PR is ready to merge.

Questions for Author

  1. Are there plans to add more evaluation modules beyond the 40+ currently implemented?
  2. Should there be a maximum limit on the number of overrides to prevent configuration complexity?
  3. Is there interest in adding a configuration validation command?

Great work on this feature!

@PrzemyslawKlys PrzemyslawKlys merged commit 5b94bce into master Jan 5, 2026
12 checks passed
@PrzemyslawKlys PrzemyslawKlys deleted the DesiredState branch January 5, 2026 21:36
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