Ways of Working

Development Workflow

Development is agent-first — every change starts as a structured issue and flows through issue → plan → implement → test → review:

1. Create an issue using the devantler-tech/.github issue templates:
   • Feature — user story with acceptance criteria.
   • Bug — expected vs actual behavior with reproduction steps.
   • Chore — user story with acceptance criteria for general tasks.
   • Kata — Improvement Kata for continuous improvement (problem → definition of awesome → target condition → actions).
2. Plan — create a structured implementation plan from the issue before writing code.
3. Implement — execute the plan following the practices in this skill (TDD, quality gates, GitHub Flow, CI/CD).
4. Manual test — validate behavior hands-on before merging. Focus on UX: output must be well-presented and every piece of feedback (errors, warnings, prompts) must be actionable.
5. Code review (optional) — CI's strict linting, scanning, and quality gates are the primary feedback loop, so manual review is not always required.

Testing

Follow the test-driven-development skill rigorously — write the test first, watch it fail, write minimal code to pass.

Application / Library Repositories

Type	Tooling	When to run
Unit tests	SDK test frameworks (e.g. go test, xunit, jest)	CI on every PR
Integration tests	SDK test frameworks	CI on every PR
E2E / system tests	GitHub Actions workflows that exercise the app/binary/service as an end user would	CI on every PR; move to merge_group if the suite becomes too heavy
Benchmark tests	SDK benchmark frameworks (e.g. BenchmarkDotNet, go test -bench)	CI on every PR

Platform / Kubernetes Repositories

For platform engineering work, ksail provides the build → run → publish loop and Testkube runs the actual test suites inside the cluster:

Type	App-repo equivalent	Tooling	What it does
Linting / scanning	Unit tests	Standard linters & scanners (e.g. kubeconform, kube-linter, Trivy)	Validate manifests statically — no cluster needed
Integration tests	Integration tests	Ephemeral local cluster (ksail cluster create) + Testkube	Spin up a Docker cluster, deploy workloads, and run Testkube test suites against them
E2E / system tests	E2E / system tests	Ephemeral or real cluster + Testkube	Deploy to a full environment (local or remote) and run end-to-end Testkube test suites

Platform lifecycle commands:

Command	Purpose
ksail project init	Scaffold a new cluster configuration
ksail cluster create	Spin up the cluster locally (Docker) or on real infrastructure and verify workloads reconcile
ksail workload push	Push Kubernetes manifests as OCI artifacts to a container registry

Code Quality Gates (CI)

Every pull request must pass:

• Strict linting — language-specific linters with zero-tolerance for warnings.
• Strict security scanning — e.g. CodeQL, Trivy, zizmor.
• Strict code quality scanning — e.g. SonarQube, MegaLinter.
• No code coverage regression — coverage must not decrease compared to the base branch.
• No benchmark regression — benchmark results must not regress compared to the base branch.

Problem Solving

• Fix at the root cause — never patch symptoms. Trace every bug or failure to its origin and fix it there.
• Workarounds are always temporary — if a workaround is unavoidable, mark it clearly (e.g. // WORKAROUND: comment with a linked issue) and schedule its removal.
• Upstream first — when a fix belongs in a dependency or upstream project, contribute it there. Only carry a local patch until the upstream change is released.

Libraries

Prefer popular, well-maintained third-party libraries over writing custom implementations. Only roll your own when no suitable library exists or when the dependency would be disproportionately heavy.

Refactoring & Design

Follow https://refactoring.guru guidelines for refactoring techniques and design patterns.

Branching & Flow

Use GitHub Flow:

1. Create a feature branch from main.
2. Open a pull request.
3. Pass all CI checks.
4. Merge via merge queue (merge_group) when the repository is configured for it; otherwise merge the pull request normally.

CI/CD Pipeline

Each repository has two core workflow files — ci.yaml and cd.yaml — plus a thin release.yaml that calls a reusable workflow (see Releases). Reusable logic is extracted into local GitHub Actions under .github/actions/:

• Composite actions — for simple, self-contained steps.
• TypeScript actions — for anything complex, because they are locally testable and avoid hard-to-read bash embedded in YAML.

Application / Library Repositories

Event	What runs
pull_request	All tests (unit, integration, E2E, benchmarks), linting, security & quality scanning, coverage & benchmark regression checks. Move E2E to merge_group only if the suite becomes too heavy.
merge_group	CD to dev environment.
push to main	Publish artifacts (packages, container images, etc.).
Semver tag (vX.X.X)	CD to prod environment.

Platform / Kubernetes Repositories

Event	What runs
pull_request	Linting & scanning (kubeconform, kube-linter, Trivy, etc.) plus integration tests on an ephemeral local cluster (ksail cluster create + Testkube). Move integration tests to merge_group if the suite becomes too heavy.
merge_group	CD to dev — deploy to staging infrastructure (e.g. Hetzner).
Semver tag (vX.X.X)	CD to prod — ksail cluster update, ksail workload push, ksail workload reconcile.

Releases

Releases are automated via the devantler-tech/reusable-workflows/.github/workflows/create-release.yaml reusable workflow. It runs semantic-release on push to main, calculates the next semver from conventional commit history, and creates the tag + GitHub release — which in turn triggers the CD pipeline above.

For application publishing, always use upstream releasers — e.g. GoReleaser for Go or dotnet-releaser for .NET — rather than hand-rolling publish scripts.

Data-Driven Improvement

• Use benchmarking data to guide performance improvements — don't optimise without numbers.
• Use code coverage data to guide where to add tests — target uncovered paths, not a vanity percentage.

Reference Implementations

• devantler-tech/ksail — Go CLI built with TDD, full CI/CD pipeline, benchmarks, and E2E system tests in GitHub Actions.
• devantler-tech/platform — Kubernetes platform using ksail for init → create → push OCI workflow, with progressive CI (Docker → Hetzner staging → Hetzner prod).