[appleboy]

Summary

Standardize the local and CI lint/test entry points using the signet reference. Pin golangci-lint v2.15.0 in a separate tools module and commit its checksums. Consolidate lint/testing in .github/workflows/testing.yml, run the same Make targets in CI, and retain repository-specific test matrices, service setup, benchmarks, and security steps.

• Resolve lint findings and normalize formatting in the affected source/tests, preserving public APIs.

Plan and classification

Scope: align .golangci.yml, go.tools.mod, Makefile and testing workflow; resolve enabled lint findings, including tracked nested example modules. No issue or Jira reference was supplied.

Leaf change — changes are bounded to development tooling, tests and/or examples; one reviewer is recommended.

flowchart TD
    CI[testing.yml] --> Make[Makefile lint and test]
    Make --> Tools[go.tools.mod pinned lint tool]
    style CI fill:#e8f4ff,stroke:#246
    style Make fill:#e8f4ff,stroke:#246
    style Tools fill:#e8f4ff,stroke:#246

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Verification

Checkout ci/standardize-lint-tooling and use the repository root. Go 1.26.10 or newer, Make, Git, network access for Go modules, and actionlint. Run all commands from the repository root.

Command	Expected behavior	Observed result
make install-tools	Download pinned tooling	Passed
go tool -modfile=go.tools.mod golangci-lint config verify	Accept the lint configuration	Passed
make fmt then make lint	Format and lint all configured modules	Passed; 0 lint issues in every configured module
make test	Run the repository tests and compile included examples	All configured packages and nested example modules passed (where present); examples without tests compiled successfully.
actionlint .github/workflows/testing.yml	Validate workflow syntax and expressions	Passed
git diff --staged --check	No whitespace errors	Passed before commit

Behavioral check (Passed): from this branch, run make install-tools, make lint, then make test; each exits zero. Lint resolves its executable through go.tools.mod rather than relying on a globally installed binary. Any configured module failure propagates a nonzero exit to CI.

Verification runtime: Go 1.26.10 darwin/arm64. The Go 1.26/1.27 hosted CI matrix has not been observed before opening this PR. External security scanners and Codecov upload require GitHub Actions and were not executed locally.

Cleanup: remove generated coverage.txt/coverage.out if present; stop only disposable test containers created for this verification.

AI authorship

• AI was used: OpenAI Codex.
• AI-authored files: .github/workflows/golangci-lint.yml, .github/workflows/testing.yml, .golangci.yml, Makefile, ace-template/main_test.go, app-engine/go11x/hello.go, basic/main_test.go, cors-middleware/main.go, custom-validation/server.go, file-binding/main.go, go.tools.mod, go.tools.sum, grpc/example1/gin/main.go, grpc/example1/grpc/server.go, new_relic/main.go, oidc/main.go, otel/main.go, realtime-advanced/main.go, realtime-advanced/routes.go, realtime-advanced/stats.go, realtime-chat/main.go, realtime-chat/rooms.go, send_chunked_data/send_chunked_data.go, server-sent-event/main.go, upload-file/limit-bytes/main_test.go.
• Human line-by-line reviewed: None — not yet reviewed by a human.

Risk and rollback

Stricter lint checks may reject future code or require formatting updates. Review the Makefile module coverage and workflow matrix/service preservation. Dependency changes are confined to the tools module; revert this commit to restore the prior tooling.

No secrets were added. Any service credentials in the verification recipe are disposable test-only values. Review source changes carefully; checksum updates are mechanical.