Summary of Changes

Hello @ReneWerner87, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on enhancing the project's code quality and CI/CD pipeline by upgrading the golangci-lint GitHub Action and its underlying linter binary. It introduces a dedicated configuration file for the linter and includes minor code adjustments to align with the updated linting standards, ensuring a more robust and consistent codebase.

Highlights

• Linter Action Update: The GitHub Actions workflow for golangci-lint has been updated to version 9.
• Linter Binary Version: The golangci-lint binary used in the Makefile's lint target has been upgraded from v1.62.2 to v2.6.2.
• Linter Configuration: A new .golangci.yml file has been added to configure the golangci-lint tool, specifying Go version 1.24 and other run parameters.
• Test Code Refactoring: Minor refactorings were applied to decoder_test.go to align with new linter rules, including introducing local variables for embedded structs and correcting field access paths in assertions.

Walkthrough

Updated golangci-lint from v1.62.2 to v2.6.2 with a new module path in the Makefile. Refactored decoder_test.go to access embedded struct fields through intermediate local aliases instead of direct promoted field access in two test functions.

Changes

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

• Verify golangci-lint v2.6.2 binary path and configuration compatibility with the new module structure
• Confirm test refactoring doesn't alter test semantics—assertions should remain logically equivalent despite the access pattern change

Possibly related PRs

• chore: update golangci-lint tooling utils#160: Migrates golangci-lint from v1 to v2 module path in Makefile, parallel tooling upgrade effort

Poem

🐰 A lint tool ascends to version two,
Tests refactor their embedded view,
Through aliases, fields come alive,
Cleaner assertions help us thrive! ✨

Pre-merge checks and finishing touches

Learnt from: efectn
Repo: gofiber/fiber PR: 3162
File: hooks_test.go:228-228
Timestamp: 2024-12-13T08:14:22.851Z
Learning: In Go test files, prefer using the `require` methods from the `testify` package for assertions instead of manual comparisons and calls to `t.Fatal` or `t.Fatalf`.

Learnt from: CR
Repo: gofiber/cli PR: 0
File: AGENTS.md:0-0
Timestamp: 2025-09-03T12:18:29.841Z
Learning: Always run `make lint`

Learnt from: CR
Repo: gofiber/cli PR: 0
File: AGENTS.md:0-0
Timestamp: 2025-09-03T12:18:29.841Z
Learning: Use the Makefile commands for common tasks (e.g., `make lint`, `make test`)

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.96%. Comparing base (e4d0470) to head (0c99dea).
⚠️ Report is 4 commits behind head on main.

@@           Coverage Diff           @@
##             main      #42   +/-   ##
=======================================
  Coverage   96.96%   96.96%           
=======================================
  Files           4        4           
  Lines         758      758           
=======================================
  Hits          735      735           
  Misses         12       12           
  Partials       11       11           

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