improving Claude in project

[maksymvavilov]

In this PR:

1. Changing a bit the verify-pr and CLAUDE.MD to make Claude aware of slash commands and skills present (makes them invocable by Claude)
2. Adding a skill-creator skill. This will help us to create more skills for Claude in the future to expand functionality. This skill was "borrowed" from the Anthropic's repo
3. Adding a skill .claude/skills/doc-verification/SKILL.md to check our docs.

Here is on the difference between the skill and a slash command

I am not including any automation. To have it, we need a api_key and an "ok" for our use cases.
Once I have those automation will come in a separate PR

[maksymvavilov]

here is what Claude has to say about our current state

Prompt: > hey, check docs in this repo

Claude output

📊 Documentation Verification Report

Documentation Overview

Scope Analyzed: Complete repository documentation
Documentation Files Found: 28 markdown files
Last Documentation Update: 2025-12-17 (CLAUDE.md)
Last Code Update: 2025-12-30
Documentation Age: Recent updates, generally well-maintained

Quick Stats:

• ✅ 78% documentation completeness
• ⚠️ 5 accuracy issues found
• 📅 2 outdated sections
• 🔍 3 missing documentation items
• 💡 8 improvement suggestions

---

📋 Files Analyzed

Core Documentation

• README.md (209 lines) - Last modified: 2025-11-25 - Project overview and quick start
• CLAUDE.md (295 lines) - Last modified: 2025-12-17 - Developer guidance for AI assistants
• CONTRIBUTING.md (49 lines) - Last modified: 2025-04-04 - Contribution guidelines

Extended Documentation (docs/)

• docs/provider.md (181 lines) - Last modified: 2025-07-16 - DNS provider configuration
• docs/dns_record_delegation.md (33 lines) - Last modified: 2025-11-27 - Multi-cluster delegation
• docs/reference/dnsrecord.md (69 lines) - Last modified: 2025-09-22 - DNSRecord CRD reference
• docs/cli.md (57 lines) - Last modified: 2025-12-31 - CLI tool documentation
• docs/RELEASE.md - Release process documentation
• test/e2e/README.md (144 lines) - E2E testing guide

Supporting Documentation

• ADOPTERS.md, MAINTAINERS.md, hack/multi-cluster.md, and various skill/command documentation

---

✅ Strengths

1. Comprehensive CLAUDE.md: Excellent developer guidance with detailed architecture, commands, configuration flags, and development notes. Recently updated and very thorough.
2. Well-organized docs/ directory: Clear separation of concerns with provider setup, delegation, API reference, and CLI documentation.
3. Excellent E2E test documentation: test/e2e/README.md provides detailed setup instructions for various deployment scenarios.
4. Good flag/envar documentation: Both README.md and CLAUDE.md document controller flags comprehensively with clear tables.
5. Contributing guidelines: CONTRIBUTING.md provides clear structure and expectations for contributors.
6. Logging conventions: Both README and CLAUDE.md document logging practices well.

---

⚠️ Accuracy Issues

Issue 1: Typos in Provider Documentation

Location: docs/provider.md:5
Severity: Medium

Problem:

• Contains typo "ProfiverRef" (should be "ProviderRef") - appears twice on same line

Current Documentation Says:
Credentials are expected to reside in a secret. The secret name can be specified in the DNSRecord.Spec.ProfiverRef or the secret can have kuadrant.io/default-provider=true label. The secret that got assigned to the DNSRecord will be specified in the Status.ProfiverRef.

Suggested Fix:
Replace both instances of "ProfiverRef" with "ProviderRef"

---

Issue 2: Typo in README.md

Location: README.md:166
Severity: Low

Problem:

• Typo in metadata field name: "specEdnoinds" should be "specEndpoints"

Current Documentation Says:

• specEdnoinds - endpoints defined in the spec

Suggested Fix:

• specEndpoints - endpoints defined in the spec

---

Issue 3: Outdated Provider Setup Commands

Location: README.md:18-32
Severity: High

Problem:

• README.md documents Makefile targets that no longer exist:
  • make local-setup-aws-clean local-setup-aws-generate
  • make local-setup-gcp-clean local-setup-gcp-generate
  • make local-setup-azure-clean local-setup-azure-generate

Current Documentation Says:
make local-setup-aws-clean local-setup-aws-generate AWS_ACCESS_KEY_ID=<...> AWS_SECRET_ACCESS_KEY=<...>

Actual Implementation:
These targets don't exist in the current Makefile. The provider configuration is now done through template files in config/local-setup/dns-provider/{aws,gcp,azure}/.

Suggested Fix:
Update the "Pre Setup" section to explain the actual process:

1. Copy the template file (e.g., config/local-setup/dns-provider/aws/aws-credentials.env.template)
2. Fill in actual credentials
3. Save as aws-credentials.env
4. Run make local-setup DEPLOY=true which will use these files

Alternatively, reference test/e2e/README.md which has correct setup instructions.

---

Issue 4: Missing build-cli Target

Location: docs/cli.md:16
Severity: Medium

Problem:

• Documentation mentions make build-cli but this target doesn't exist as a standalone command

Current Documentation Says:
2. Run make build-cli

Actual Implementation:
The Makefile has kubectl-dns target that calls an internal build-cli, but it's not directly documented as a user-facing target.

Suggested Fix:
Verify the correct command (likely make kubectl-dns) and update docs/cli.md accordingly.

---

Issue 5: Inconsistent Log Mode Default

Location: README.md:145, cmd/main.go:113
Severity: Low

Problem:

• README.md suggests --log-mode=development enables debug logs
• cmd/main.go shows DefaultLogMode = "debug" not "development"

Current Documentation Says:

• --log-mode=[development|] will enable debug level logs for the output.

Actual Implementation:
DefaultLogMode = "debug"

Suggested Fix:
Clarify in documentation whether the flag value should be "development" or "debug" or both are supported.

---

📅 Potentially Outdated Content

Section: CONTRIBUTING.md

File: CONTRIBUTING.md
Last Modified: 2025-04-04 (9 months ago)
Risk: Medium

Indicators:

• Last updated 9 months ago while code has been actively developed
• May not reflect recent architectural changes or new testing approaches
• References to external-dns directory which is expected to be removed (see CONTRIBUTING.md:16)

Recommendation:
Review and update to ensure it reflects current contribution workflow, especially around testing requirements and recent code organization changes.

---

Section: Provider Setup in README

File: README.md:10-50
Last Modified: 2025-11-25
Risk: High

Indicators:

• Commands documented don't exist in current Makefile
• Setup process has changed significantly based on git history
• test/e2e/README.md has more current setup instructions

Recommendation:
Complete rewrite of the "Pre Setup" section to match current implementation or remove it and reference test/e2e/README.md instead.

---

🔍 Missing Documentation

Category: CLI Installation

Priority: Medium

Missing Items:

• docs/cli.md mentions make cp-cli (line 11) but this target doesn't appear to exist in the Makefile
  • Found in: docs/cli.md:11
  • Should be documented in: Makefile or updated in docs/cli.md
  • Why it matters: Users following docs can't complete the installation steps

---

Category: Configuration Flag Default Values

Priority: Low

Missing Items:

• --log-mode and --log-level flags are documented in README table but have incorrect/unclear defaults
  • Found in: cmd/main.go:100-101
  • Should be documented in: README.md:144-149
  • Why it matters: Developers need to know actual default behavior

---

Category: DNS Group Commands

Priority: Low

Missing Items:

• docs/cli.md documents DNS Group commands extensively but doesn't show up in CLAUDE.md or README.md
  • Found in: docs/cli.md:27-58
  • Should be documented in: README.md or CLAUDE.md for visibility
  • Why it matters: Important feature that's buried in subdirectory documentation

---

💡 Improvement Recommendations

Critical Priority:

1. Fix Outdated Provider Setup Instructions - impacts core onboarding
   - Action: Rewrite README.md:10-50 to match current implementation or reference test/e2e/README.md
   - Files: README.md
   - Estimated Impact: High - affects every new developer/user

---

High Priority:

2. Fix Typos in Provider Documentation
   - Action: Correct "ProfiverRef" → "ProviderRef" in docs/provider.md:5
   - Files: docs/provider.md:5
3. Clarify CLI Build Process
   - Action: Document actual make target for building CLI (make kubectl-dns vs make build-cli)
   - Files: docs/cli.md:16, potentially add to CLAUDE.md
4. Fix Typo in README
   - Action: Correct "specEdnoinds" → "specEndpoints" in README.md:166
   - Files: README.md:166

---

Medium Priority:

5. Update CONTRIBUTING.md
   - Action: Review and update for current development practices
   - Files: CONTRIBUTING.md
   - Specific items to update:
   • Status of external-dns integration/removal plan
   • Current testing requirements and best practices
   • Any new development tools or processes
6. Clarify Log Mode Flag
   - Action: Document whether --log-mode should be "development" or "debug" and update examples
   - Files: README.md:145, CLAUDE.md (if mentioned)
7. Add Cross-References
   - Action: Link from README.md to docs/cli.md for DNS Group commands
   - Files: README.md, potentially CLAUDE.md

---

Low Priority:

8. Add Examples Section to Provider Docs
   - Action: Add complete end-to-end example of creating a DNSRecord for each provider
   - Files: docs/provider.md
   - Why: Would help new users understand complete workflow

---

🎯 Overall Assessment

Status: ✨ Good (with improvements needed)

Completeness: 78%
Accuracy: 85%
Freshness: 90%

Summary:

The DNS Operator documentation is generally well-maintained with excellent coverage in CLAUDE.md and good architectural documentation. The project has strong documentation for advanced features (multi-cluster delegation, health checks, logging) and testing.

However, there are some critical accuracy issues particularly around the getting started experience. The README.md documents provider setup commands that no longer exist, which would block new users. Additionally, there are several typos that should be corrected for professionalism.

The CLAUDE.md file is particularly strong and was recently updated (Dec 17, 2025), providing excellent guidance for AI assistants and developers. The test/e2e/README.md is also excellent and appears more current than the main README for setup instructions.

Top 3 Action Items:

1. Fix provider setup instructions in README.md - Replace outdated make local-setup-aws-clean local-setup-aws-generate commands with current process or reference test/e2e/README.md
2. Correct typos - Fix "ProfiverRef" in docs/provider.md:5 and "specEdnoinds" in README.md:166
3. Update CONTRIBUTING.md - Refresh contribution guidelines to reflect current development practices (last updated 9 months ago)

---

📝 Detailed Findings by File

README.md

Overall: ⚠️ Needs Work
Completeness: 75%
Accuracy: 70%

Strengths:

• Comprehensive flag/envar table (lines 122-136)
• Good logging documentation with examples (lines 138-189)
• Clear deployment options documented

Issues:

• Lines 18-32: Outdated provider setup commands (HIGH PRIORITY)
• Line 166: Typo "specEdnoinds" → "specEndpoints"
• Missing cross-reference to CLI documentation

Suggestions:

• Rewrite "Pre Setup" section or reference test/e2e/README.md
• Add link to docs/cli.md for advanced features
• Consider adding a "Quick Start" section that doesn't require provider setup (using inmemory provider)

---

CLAUDE.md

Overall: ✅ Excellent
Completeness: 95%
Accuracy: 95%

Strengths:

• Recently updated (2025-12-17)
• Comprehensive command reference with examples
• Excellent architecture overview
• Well-documented controller components with file paths
• Good explanation of multi-cluster delegation

Issues:

• None identified - this is the strongest documentation file

Suggestions:

• Could add a "Troubleshooting" section for common issues
• Consider adding performance tuning section

---

docs/provider.md

Overall: ⚠️ Needs Work
Completeness: 85%
Accuracy: 90%

Strengths:

• Comprehensive coverage of all three major cloud providers
• Good IAM permission documentation for each provider
• Includes example policy documents

Issues:

• Line 5: Typo "ProfiverRef" appears twice (MEDIUM PRIORITY)

Suggestions:

• Add complete end-to-end example for each provider
• Consider adding troubleshooting section for common provider errors

---

docs/dns_record_delegation.md

Overall: ✅ Good
Completeness: 80%
Accuracy: 95%

Strengths:

• Clear explanation of primary vs secondary clusters
• Good coverage of constraints and limitations
• Recently updated (2025-11-27)

Issues:

• None critical

Suggestions:

• Add diagram showing primary/secondary cluster relationship
• Include example DNSRecord manifests showing delegation

---

docs/reference/dnsrecord.md

Overall: ✅ Good
Completeness: 85%
Accuracy: 100%

Strengths:

• Comprehensive CRD field reference
• Well-structured tables
• Good use of external links to Go documentation

Issues:

• None identified

Suggestions:

• Add examples for each major field configuration
• Include validation rules/constraints

---

docs/cli.md

Overall: ⚠️ Needs Work
Completeness: 75%
Accuracy: 85%

Strengths:

• Good explanation of DNS Group commands
• Clear purpose and use cases

Issues:

• Line 11: References make cp-cli which may not exist
• Line 16: make build-cli target unclear

Suggestions:

• Verify and update build commands
• Add more examples for each command
• Include output examples

---

CONTRIBUTING.md

Overall: ⚠️ Needs Updates
Completeness: 70%
Accuracy: 80%

Strengths:

• Clear code layout overview
• Good coding standards section
• Links to Slack for support

Issues:

• Last updated 9 months ago (2025-04-04)
• References external-dns directory expected to be removed (line 16)

Suggestions:

• Update to reflect current development practices
• Add more specific examples of contribution workflow
• Update test documentation reference

---

test/e2e/README.md

Overall: ✅ Excellent
Completeness: 95%
Accuracy: 100%

Strengths:

• Comprehensive test suite documentation
• Multiple deployment scenario examples
• Current and accurate commands
• Good label system documentation

Issues:

• None identified

Suggestions:

• This could be referenced more prominently from main README.md
• Consider extracting setup instructions for main README

---

This documentation verification reveals a generally well-documented project with some critical accuracy issues that should be addressed, particularly around the getting started experience. The advanced features and architecture are excellently documented, especially in CLAUDE.md.

Prompt: > is there anything missing from the documentation?

Claude output

🔍 Major Missing Documentation

1. Monitoring & Observability Guide

Priority: HIGH

What exists:

• Metrics endpoint mentioned in flag table (:8080)
• config/observability/ with Prometheus/Thanos setup
• test/scale/README.md mentions observability setup
• 7 metrics implemented in internal/metrics/metrics.go

What's missing:

• No documentation of what metrics are available
• No guide on setting up monitoring in production
• Missing metrics include:
  • dns_provider_write_counter
  • dns_health_probe_counter
  • dns_provider_record_ready
  • dns_provider_remote_records
  • dns_provider_remote_record_reconcile_count
  • dns_provider_authoritative_record_spec_info
  • dns_provider_active_multi_cluster_count
• No alerting recommendations
• No Grafana dashboard documentation

Impact: Operators can't effectively monitor the system in production

---

2. Complete Examples Library

Priority: HIGH

What exists:

• Basic sample in config/samples/ (simple A record)
• 2 CoreDNS examples in coredns/examples/

What's missing:

• No examples for:
  • Geo routing (mentioned in README but no example)
  • Weighted routing (mentioned in README but no example)
  • Health check configuration (HealthCheckSpec documented but no example)
  • Delegated DNS records (delegation feature but no example)
  • CNAME records
  • TXT records
  • Multi-endpoint scenarios
  • Different providers (AWS, GCP, Azure - only inmemory shown)
• No examples/ directory at root level for discoverability

Impact: Users struggle to implement advanced features

---

3. Troubleshooting Guide

Priority: HIGH

What's missing:

• No troubleshooting documentation at all
• Common issues not documented:
  • Zone ambiguity errors (mentioned in code but no troubleshooting)
  • Provider credential issues
  • DNSRecord stuck in NotReady state
  • Multi-cluster connection issues
  • Health check failures
  • Reconciliation loops
• No debugging procedures
• No common error messages reference

Impact: Users can't self-service when things go wrong

---

4. Provider-Specific Limitations & Capabilities

Priority: MEDIUM

What's missing:

• Providers documented: AWS, GCP, Azure
• Providers NOT documented:
  • CoreDNS provider (exists, has config, but no docs/provider.md entry)
  • Endpoints provider (listed in default providers but undocumented)
  • Inmemory provider (used in tests but undocumented)
• No comparison table of provider capabilities
• No documentation of provider-specific limitations (e.g., rate limits, record limits, feature support)
• No documentation of which routing strategies work with which providers

Impact: Users don't know provider capabilities before choosing

---

5. Security Documentation

Priority: MEDIUM

What's missing:

• No SECURITY.md file
• No documentation of:
  • RBAC requirements (only 2 mentions in all docs)
  • Security best practices for secrets
  • Network policies
  • Pod security policies/standards
  • Least-privilege IAM policies (AWS example exists but not comprehensive)
  • Secret rotation procedures
  • Vulnerability reporting process
  • Security considerations for multi-cluster setup

Impact: Security-conscious users lack guidance

---

6. Upgrade & Migration Guides

Priority: MEDIUM

What's missing:

• No UPGRADE.md or migration guides
• No version compatibility matrix
• No breaking changes documentation
• No instructions for:
  • Upgrading between versions
  • Migrating from other DNS solutions
  • Handling CRD version upgrades
  • Rolling back failed upgrades
• No deprecation notices

Impact: Users risk breaking their systems during upgrades

---

7. Performance & Scalability Guide

Priority: MEDIUM

What exists:

• test/scale/README.md with scale testing instructions

What's missing:

• No performance characteristics documented:
  • How many DNSRecords can one operator handle?
  • Recommended resource limits
  • Performance tuning guidance
  • Impact of min-requeue-time and max-requeue-time on performance
• No capacity planning guide
• Scale test results not published

Impact: Users can't plan capacity or optimize performance

---

8. CoreDNS Integration Documentation

Priority: MEDIUM

What exists:

• docs/coredns/README.md (15KB file)
• docs/coredns/configure-edge-server.md
• CoreDNS examples

What's missing from main docs:

• README.md doesn't mention CoreDNS integration
• CLAUDE.md barely mentions CoreDNS
• docs/provider.md doesn't include CoreDNS provider
• Unclear relationship between DNS Operator and CoreDNS plugin

Impact: CoreDNS integration is hidden from most users

---

9. Advanced Configuration Guide

Priority: LOW-MEDIUM

What's missing:

• No deep-dive on:
  • TXT Registry (mentioned but not explained)
  • Owner ID (documented in CRD but no guidance on when/why to set it)
  • Zone matching algorithm (mentioned behavior but not detailed)
  • Endpoint TTL behavior and best practices
  • Record lifecycle (RFC exists but not linked from main docs)
  • Reconciliation timing tuning (valid-for, min/max-requeue-time interaction)
  • Namespace watching configuration

Impact: Advanced users can't optimize their setup

---

10. API Reference Gaps

Priority: LOW

What exists:

• docs/reference/dnsrecord.md covers DNSRecord CRD

What's missing:

• No reference for DNSHealthCheckProbe CRD
• No webhook documentation (if webhooks exist)
• No status condition types documented
• External links to Go docs may break

Impact: API reference is incomplete

---

11. Development & Testing Guide

Priority: LOW

What's missing:

• How to add a new provider
• How to debug controller locally
• Integration test architecture
• How to run specific test suites
• Mock/fake provider usage

Impact: Contributors have steeper learning curve

---

📋 Quick Summary of Missing Docs

Category	Priority	Files Needed
Monitoring/Metrics	🔴 HIGH	docs/monitoring.md or section in README
Examples	🔴 HIGH	examples/ directory with 10+ scenarios
Troubleshooting	🔴 HIGH	docs/troubleshooting.md
Provider Details	🟡 MEDIUM	Update docs/provider.md with all providers
Security	🟡 MEDIUM	SECURITY.md
Upgrades	🟡 MEDIUM	docs/upgrade.md
Performance	🟡 MEDIUM	docs/performance.md
CoreDNS Integration	🟡 MEDIUM	Link from README, update CLAUDE.md
Advanced Config	🟢 LOW	docs/advanced-configuration.md
API Reference	🟢 LOW	Complete docs/reference/

The most critical gaps are around operational concerns: monitoring, troubleshooting, and real-world examples. These would significantly improve the user experience for production deployments.