Update modernize-java plugin

[leonard520]

…ure-java-migration-copilot-vscode-extension@4657622

Source commit: 4657622462e4904f9619e35b4f2919bfa56c454e

Source branch: fix/sync-from-release-tag

Triggered by: haital_microsoft

Workflow: https://github.com/devdiv-azure-service-dmitryr/azure-java-migration-copilot-vscode-extension/actions/runs/26074926939

Pull Request Checklist

• I have read and followed the CONTRIBUTING.md guidelines.
• I have read and followed the Guidance for submissions involving paid services.
• My contribution adds a new instruction, prompt, agent, skill, or workflow file in the correct directory.
• The file follows the required naming convention.
• The content is clearly structured and follows the example format.
• I have tested my instructions, prompt, agent, skill, or workflow with GitHub Copilot.
• I have run npm start and verified that README.md is up to date.
• I am targeting the staged branch for this pull request.

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Description

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Type of Contribution

• New instruction file.
• New prompt file.
• New agent file.
• New plugin.
• New skill file.
• New agentic workflow.
• Update to existing instruction, prompt, agent, plugin, skill, or workflow.
• Other (please specify):

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Additional Notes

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By submitting this pull request, I confirm that my contribution abides by the Code of Conduct and will be licensed under the MIT License.

[github-actions]

🔍 Skill Validator Results

✅ All checks passed

Scope	Checked
Skills	1
Agents	1
Total	2
Severity	Count
---	---:
❌ Errors	0
⚠️ Warnings	0
ℹ️ Advisories	0

Summary

Level	Finding
ℹ️	Found 1 agent(s)
ℹ️	Validated 1 agent(s)
ℹ️	✅ All checks passed (1 agent(s))

Full validator output

```text Found 1 agent(s) Validated 1 agent(s)

✅ All checks passed (1 agent(s))

</details>

[Copilot]

Pull request overview

Updates the modernize-java plugin to align with upstream release 1.17.0, including MCP server invocation tweaks and a significant refresh of the modernize-java agent’s workflow/plan-generation guidance.

Changes:

• Bumped plugin version to 1.17.0 and pinned the MCP server package to @1.17.0, adding --callerType plugin.
• Updated the modernize-java agent guidance (plan format spec, event reporting details, precheck behavior changes).
• Added a PostToolUse hook to the agent front matter to run telemetry scripts after tool usage.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
plugins/modernize-java/.github/plugin/plugin.json	Bumps plugin version and adjusts MCP server npx args (pin + callerType).
agents/modernize-java.agent.md	Expands/changes upgrade workflow instructions and adds a PostToolUse hook command.

[aaronpowell]

Is this in a public github repo? Would it be worth migrating to the external plugin model?