feat: add AGENTS.md, CLAUDE.md, CONTRIBUTING.md, and copilot-instructions.md

Establish the guidance chain for agents and contributors:
- AGENTS.md: OKF-style pointer file with discovery order and links to
  PSModule/docs and MSXOrg/docs
- CLAUDE.md: Claude Code entry point that imports AGENTS.md
- .github/copilot-instructions.md: Copilot entry point pointing to AGENTS.md
- CONTRIBUTING.md: self-contained contribution workflow for the template repo

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: MariusStorhaug

.github/copilot-instructions.md

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+# Copilot Instructions
+
+See [`AGENTS.md`](../AGENTS.md) for all onboarding and guidance pointers for this repository.

AGENTS.md

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+# Agents
+
+This file is the onboarding entry point for agents working in this repository.
+It is a pointer file — guidance lives in the documentation, not here.
+
+## This repository
+
+`Template-PSModule` is the canonical starting template for new PowerShell modules in the PSModule organization.
+It provides the CI/CD framework wiring, starter layout, and community files that every PSModule module repository begins with.
+
+Read in this order:
+
+1. [`README.md`](README.md) — what this repository is and its purpose as a template.
+2. [`CONTRIBUTING.md`](CONTRIBUTING.md) — how to work on the template itself.
+3. [`.github/PSModule.yml`](.github/PSModule.yml) — framework configuration defaults.
+
+## PSModule guidance
+
+For PSModule-specific build, layout, and process guidance:
+
+- [Template quickstart](https://psmodule.github.io/docs/Modules/Process-PSModule/template-quickstart/) — how to create a new module from this template.
+- [Repository defaults](https://psmodule.github.io/docs/Modules/Repository-Defaults/) — the expected repository layout and required files.
+- [Module anatomy](https://psmodule.github.io/docs/Modules/module-anatomy/) — source layout and framework conventions.
+- [Build, test, pack, publish](https://psmodule.github.io/docs/Modules/Process-PSModule/build-test-pack-publish/) — the CI/CD pipeline.
+- [Standards](https://psmodule.github.io/docs/Modules/Standards/) — PowerShell module coding standards.
+
+## Org-wide guidance
+
+For cross-cutting ways of working and standards:
+
+- [Agentic Development](https://msxorg.github.io/docs/Ways-of-Working/Agentic-Development/) — how agents and humans collaborate in this ecosystem.
+- [Ways of Working](https://msxorg.github.io/docs/Ways-of-Working/) — contribution workflow, branching, PRs, issues.
+- [Coding Standards](https://msxorg.github.io/docs/Coding-Standards/) — language-level conventions.
+
+## Main directive
+
+Everything is a work in progress and can be improved.
+If you find a problem, fix it if it is small; otherwise open an issue in the relevant repository.

CLAUDE.md

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+# Claude
+
+See [`AGENTS.md`](AGENTS.md) for all onboarding and guidance pointers for this repository.

CONTRIBUTING.md

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+# Contributing
+
+Thank you for contributing to `Template-PSModule`.
+This file describes how to work on the template itself — not how to use it.
+If you want to create a new module from this template, see the [template quickstart](https://psmodule.github.io/docs/Modules/Process-PSModule/template-quickstart/).
+
+## What this repository is
+
+`Template-PSModule` is the canonical starting template for new PowerShell modules in the PSModule organization.
+Changes to this repository affect every module created from it going forward.
+Keep changes focused: structural layout, required community files, CI/CD wiring, and framework defaults.
+
+## Before you start
+
+1. Read [`AGENTS.md`](AGENTS.md) for the guidance chain and documentation references.
+2. Familiarise yourself with the [repository defaults](https://psmodule.github.io/docs/Modules/Repository-Defaults/) that this template must satisfy.
+3. Check the open issues and pull requests to avoid duplicate work.
+
+## Workflow
+
+This project follows the [MSXOrg contribution workflow](https://msxorg.github.io/docs/Ways-of-Working/Contribution-Workflow/):
+
+1. Open or pick up an issue that describes the change.
+2. Create a branch from `main` following the `<type>/<issue>-<short-slug>` convention (e.g. `feat/42-add-security-md`).
+3. Make small, focused commits and push often.
+4. Open a **draft PR** as soon as the change has a basic shape — early feedback is preferred.
+5. Mark the PR ready for review once CI is green and the change is complete.
+
+For branching details, see [Branching and Merging](https://msxorg.github.io/docs/Ways-of-Working/Branching-and-Merging/).
+
+## Pull requests
+
+- Keep PRs small and focused on a single deliverable.
+- The PR title should follow the [commit conventions](https://msxorg.github.io/docs/Ways-of-Working/Commit-Conventions/).
+- Auto-merge is enabled; the PR lands as soon as all required checks pass and a reviewer approves.
+
+For PR format guidance, see [PR Format](https://msxorg.github.io/docs/Ways-of-Working/PR-Format/).
+
+## Issues
+
+Use GitHub Issues to report bugs, request features, or propose template changes.
+Follow the [issue format](https://msxorg.github.io/docs/Ways-of-Working/Issue-Format/) guidance.
+
+## Code standards
+
+PowerShell in this template follows the [PSModule Standards](https://psmodule.github.io/docs/Modules/Standards/) and the
+[MSXOrg Coding Standards](https://msxorg.github.io/docs/Coding-Standards/).
+
+## Questions
+
+Open a GitHub Discussion or file an issue if something is unclear.