Add comprehensive beginner-friendly documentation

[deepsm007]

/cc @openshift/test-platform

/hold

Assisted by Claude

[openshift-ci-robot]

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📥 Commits

Reviewing files that changed from the base of the PR and between c02f4b3fd3140e133f49031d9796b4f7275627dc and cf95330a8ff0d7ec84abd5877f14a4cbf6890ec1.

📒 Files selected for processing (1)

• docs/README.md (1 hunks)

Walkthrough

Adds extensive documentation across the repository: new docs in docs/, expanded CONTRIBUTING.md, and many new README.md files under cmd/ and pkg/. Changes are documentation-only; no code, API, or exported-entity modifications.

Changes

Cohort / File(s)	Summary
Root documentation docs/ARCHITECTURE.md, docs/README.md, docs/SETUP.md, CONTRIBUTING.md	New architecture guide with diagrams and usage, documentation hub/index, beginner setup guide with prerequisites and troubleshooting, and extensively expanded contributing guidelines and FAQ.
Command tool READMEs cmd/.../README.md (e.g. cmd/ci-operator/README.md, cmd/autotestgridgenerator/README.md, cmd/backport-verifier/README.md, cmd/bugzilla-backporter/README.md, cmd/check-cluster-profiles-config/README.md, cmd/ci-operator-config-mirror/README.md, cmd/ci-operator-configresolver/README.md, cmd/ci-operator-prowgen/README.md, cmd/ci-secret-bootstrap/README.md, cmd/cluster-display/README.md, cmd/cluster-operator-status/README.md, cmd/clusterimageset-updater/README.md, cmd/determinize-ci-operator/README.md, cmd/determinize-peribolos/README.md, cmd/determinize-prow-config/README.md, cmd/docgen/README.md, cmd/dptp-pools-cm/README.md, cmd/entrypoint-wrapper/README.md, cmd/generate-registry-metadata/README.md, cmd/helpdesk-faq/README.md, cmd/job-trigger-controller-manager/README.md, cmd/payload-testing-prow-plugin/README.md, cmd/pipeline-controller/README.md, cmd/pj-rehearse/README.md, cmd/rebalancer/README.md, cmd/result-aggregator/README.md, cmd/retester/README.md)	Adds individual README documentation for many command-line tools and Prow plugins describing purpose, usage, options, workflows, and examples.
Package documentation pkg/.../README.md (e.g. pkg/api/README.md, pkg/controller/README.md, pkg/steps/README.md)	Adds package-level READMEs describing APIs, core data types, controller patterns, Step interface, execution flow, and related references.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

• Focus review on high-density documentation with examples or diagrams:
  • docs/ARCHITECTURE.md
  • CONTRIBUTING.md
  • command READMEs that include CLI flags, YAML snippets, or workflows (verify accuracy and consistency).

✨ Finishing touches

🧪 Generate unit tests (beta)

• [ ] Create PR with unit tests
• [ ] Post copyable unit tests in a comment

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[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: deepsm007, liangxia

The full list of commands accepted by this bot can be found here.

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• ~~OWNERS~~ [deepsm007,liangxia]

Approvers can indicate their approval by writing /approve in a comment Approvers can cancel approval by writing /approve cancel in a comment

[openshift-ci-robot]

Scheduling required tests: /test e2e

[liangxia]

Nice doc. :+1:

[Prucek]

I think it's a good idea, but I think we should invest more time in it. I feel like the documentation is very vague, not going into detail much, and repeating itself a bit: ARCHITECTURE.md, CODEBASE_WALKTHROUGH.md, SETUP.md, SUMMARIES.md, USAGE.md, OVERVIEW.md, sounds pretty similar to me, I think I would prefer maybe just one or two. I would also like to add such a readme for every component (maybe also each package) we have, so that it is easy to start with claude on any tool.

Also I am not sure if we need these: CONTRIBUTING_GUIDE.md, FAQ.md, ONBOARDING.md, these would be a better fit in o/release maybe.

[openshift-ci[bot]]

New changes are detected. LGTM label has been removed.

[openshift-ci[bot]]

@deepsm007: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/breaking-changes	cf95330a8ff0d7ec84abd5877f14a4cbf6890ec1	link	false	/test breaking-changes

Full PR test history. Your PR dashboard.

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[deepsm007]

I think this is way better, but I would rather make it even better. Some of them are pretty good, but others lack details. I think we should combine the knowledge of ci-docs, o/release, branching doc, and the ci-tools with our knowledge and be pedantic on what it says. I would focus on one tool in more detail, let's say pj-rehearse:

* understand how the code works along with the rehearse package

* understand how it is deployed, also that we can test with the alpha deployment

* what commands it does have

* and combine with the doc in ci/docs
  so that it has a nice overall picture.
  I know this is really time-consuming, but I think it's worth it. You can't make that on your own. Everyone would need to help when they touch a tool and it doesn't have .md, make it. We can discuss this in our meetings. Until then, I would like to help you.

I'll spend more time rewriting this.