[Copilot]

Summary

Adds .github/copilot-setup-steps.yaml to define automated environment setup for GitHub Copilot coding agent.

Why

Completes Copilot infrastructure per best practices. Repository already has comprehensive instructions (.github/copilot-instructions.md) but lacked automated setup steps.

What changed

• Added .github/copilot-setup-steps.yaml with three steps:
  • Install Go dependencies via go mod download
  • Install golangci-lint v2.5.0 (matches script/lint version)
  • Verify installation with error handling

MCP impact

• No tool or API changes

Prompts tested (tool changes only)

N/A

Security / limits

• No security or limits impact

Lint & tests

• Linted locally with ./script/lint
• Tested locally with ./script/test

Docs

• Not needed

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• gh.io
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>✨ Set up Copilot instructions</issue_title>
<issue_description>Configure instructions for this repository as documented in Best practices for Copilot coding agent in your repository.

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes ✨ Set up Copilot instructions #3

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[Copilot]

Pull request overview

This PR adds a Copilot setup steps configuration file to automate environment setup for GitHub Copilot coding agent. The configuration complements existing Copilot instructions by defining executable setup steps for Go dependencies and tooling.

Changes:

• Added .github/copilot-setup-steps.yaml with three automated setup steps: Go module dependency installation, golangci-lint v2.5.0 installation, and setup verification

[Copilot]

The variable $GOLANGCI_LINT_VERSION should be quoted to prevent potential word splitting or globbing issues. The corresponding code in script/lint line 11 uses quotes: sh -s "$GOLANGCI_LINT_VERSION". This ensures consistent behavior even if the variable contains spaces or special characters.

Suggested change

	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s $GOLANGCI_LINT_VERSION
	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s "$GOLANGCI_LINT_VERSION"