feat: 🎸 02-graph-validation-and-utilities

[thalesraymond]

No description provided.

[github-actions]

🤖 Jules Review

Summary

This PR implements robust task graph validation and Mermaid flowchart generation in Go. It introduces distinct, standard Go error types for validation failures, utilizes an explicit stack for cycle detection (preventing recursion stack overflows on deep graphs), and safely sanitizes and escapes node names for Mermaid diagrams. The implementation is highly efficient, idiomatic, and well-tested.

Strengths

• Excellent DFS Implementation: The explicit stack implementation for cycle detection avoids recursion depth limits and accurately isolates and reports exact cycle paths.
• Idiomatic Error Handling: Utilizing Unwrap() []error within ValidationErrors elegantly supports Go 1.20+ errors.Is/errors.As multi-error inspection.
• Robust Mermaid Generation: The use of strings.NewReplacer combined with a deterministic ID generation loop ensures performance and syntax safety when handling special characters in Mermaid nodes.

Verdict

VERDICT: approve

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Session: 6321501400233135278

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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