Adds Copilot instructions & agents

[Miraeld]

Description

Fixes #xx
Nothing impacts users.
Only add copilot instructions & custom agents.

Type of change

• Chore

Detailed scenario

What was tested

Nothing to be tested, Only md files added.

How to test

Nothing to be tested, Only md files added.

Technical description

Documentation

This pull request adds detailed agent documentation for the rocket-scripts project, covering three specialized roles: performance beacon implementation, build/release management, and technical documentation. Each agent file provides clear responsibilities, technical context, coding standards, and boundaries for contributors. These guides are designed to streamline onboarding, clarify team roles, and ensure best practices across development, build, and documentation workflows.

Agent responsibilities and workflow documentation:

• Performance Beacon Agent: Introduces .github/agents/beacon-agent.md with instructions for implementing new beacon features, coding standards, architecture patterns, integration steps, and performance best practices for client-side detection beacons.
• Build/Release Agent: Adds .github/agents/build-agent.md detailing the build pipeline, esbuild usage, CI/CD workflows, release process, troubleshooting, and boundaries for managing npm publishing and WP Rocket integration.
• Documentation Agent: Provides .github/agents/docs-agent.md outlining documentation standards, JSDoc comment patterns, README structure, writing style guidelines, review checklists, and update frequency for maintaining technical documentation and code comments.

Mandatory Checklist

Code validation

• I validated all the Acceptance Criteria. If possible, provide screenshots or videos.
• I triggered all changed lines of code at least once without new errors/warnings/notices.
• I implemented built-in tests to cover the new/changed code.

Code style

• I wrote a self-explanatory code about what it does.
• I protected entry points against unexpected inputs.
• I did not introduce unnecessary complexity.
• Output messages (errors, notices, logs) are explicit enough for users to understand the issue and are actionnable.

Unticked items justification

Nothing needed, only md files added.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for 641682e1	✅ ∅ (target: 50.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (641682e)	Report Missing	Report Missing	Report Missing
Head commit (1cedc59)	1946	1610	82.73%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#68)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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Footnotes

1. Codacy didn't receive coverage data for the commit, or there was an error processing the received data. Check your integration for errors and validate that your coverage setup is correct. ↩

[Copilot]

Pull request overview

This PR adds comprehensive GitHub Copilot instructions and specialized agent documentation to streamline development workflows for the rocket-scripts project. The documentation establishes clear coding standards, testing patterns, build processes, and role-specific guidelines.

Key Changes:

• Added main Copilot instructions with architecture patterns, coding standards, and browser API usage guidelines
• Created four specialized agent guides for test engineering, documentation, build/release management, and beacon implementation
• Established consistent patterns for development workflows including testing, building, and integration with WP Rocket

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
.github/copilot-instructions.md	Comprehensive guide covering project architecture, ES6 module patterns, DOM/browser APIs, testing standards, build process, and performance considerations for the beacon functionality
.github/agents/test-agent.md	Quality engineer agent documentation for writing Mocha/Sinon tests, mocking browser APIs, and ensuring comprehensive test coverage
.github/agents/docs-agent.md	Technical writer agent guide for maintaining README, JSDoc comments, and code documentation with clear writing standards and examples
.github/agents/build-agent.md	Build/release engineer documentation covering esbuild configuration, CI/CD workflows, npm publishing, and WP Rocket integration process
.github/agents/beacon-agent.md	Performance optimization specialist guide for implementing new beacon features with coding standards, browser API patterns, and integration steps

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