fix(workflows): correct JSON output formatting in plugin discovery step

Description

Fixed the plugin collection discovery step in the plugin-package.yml workflow by adding the compact output flag (-c) to the jq command. Without compact output, jq -s produced multi-line pretty-printed JSON that broke the $GITHUB_OUTPUT mechanism in GitHub Actions, preventing the matrix strategy from parsing the discovered plugin collections correctly.

• fix(workflows): Added -c (compact) flag to jq -s in the plugin discovery step, changing jq -s '{include: .}' to jq -sc '{include: .}' to produce single-line JSON output compatible with $GITHUB_OUTPUT.

Related Issue(s)

N/A

Type of Change

Select all that apply:

Code & Documentation:

• Bug fix (non-breaking change fixing an issue)
• New feature (non-breaking change adding functionality)
• Breaking change (fix or feature causing existing functionality to change)
• Documentation update

Infrastructure & Configuration:

• GitHub Actions workflow
• Linting configuration (markdown, PowerShell, etc.)
• Security configuration
• DevContainer configuration
• Dependency update

AI Artifacts:

• Reviewed contribution with prompt-builder agent and addressed all feedback
• Copilot instructions (.github/instructions/*.instructions.md)
• Copilot prompt (.github/prompts/*.prompt.md)
• Copilot agent (.github/agents/*.agent.md)
• Copilot skill (.github/skills/*/SKILL.md)

Note for AI Artifact Contributors:

• Agents: Research, indexing/referencing other project (using standard VS Code GitHub Copilot/MCP tools), planning, and general implementation agents likely already exist. Review .github/agents/ before creating new ones.
• Skills: Must include both bash and PowerShell scripts. See Skills.
• Model Versions: Only contributions targeting the latest Anthropic and OpenAI models will be accepted. Older model versions (e.g., GPT-3.5, Claude 3) will be rejected.
• See Agents Not Accepted and Model Version Requirements.

Other:

• Script/automation (.ps1, .sh, .py)
• Other (please describe):

Testing

• Verified that jq -sc '{include: .}' produces single-line JSON suitable for GitHub Actions matrix output.
• Confirmed the workflow YAML syntax is valid after the change.

Checklist

Required Checks

• Documentation is updated (if applicable)
• Files follow existing naming conventions
• Changes are backwards compatible (if applicable)
• Tests added for new functionality (if applicable)

Required Automated Checks

The following validation commands must pass before merging:

• Markdown linting: npm run lint:md
• Spell checking: npm run spell-check
• Frontmatter validation: npm run lint:frontmatter
• Link validation: npm run lint:md-links
• PowerShell analysis: npm run lint:ps

Security Considerations

• This PR does not contain any sensitive or NDA information
• Any new dependencies have been reviewed for security issues
• Security-related scripts follow the principle of least privilege

Additional Notes

The jq -s (slurp) flag correctly aggregates JSON objects into an array, but its default pretty-printed output spans multiple lines. GitHub Actions $GITHUB_OUTPUT requires values to be on a single line. The -c (compact) flag resolves this by ensuring the JSON is emitted as a single line.

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