Adds the 'Oracle-to-PostgreSQL Migration Expert' Custom Agent, Asociated Skills, and Plugin Manifest

[PrimedPaul]

Pull Request Checklist

• I have read and followed the CONTRIBUTING.md guidelines.
• 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.

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Description

Adds the 'Oracle-to-PostgreSQL Migration Expert' Custom Agent, its associated skills, plugin manifest.
This custom agent is for helping users migrate application codebases from Oracle to Postgres.
This custom agent uses a 'gated' approach, never moving onto the next step without user approval.

The skills' syntax follow the 'Claude API Docs' best practices.

I constantly refine the custom agent by enhancing it's skillset with real-world occurrences of common migration errors and differences to look out for.

READMEs updated using 'npm run build'.

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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

I am currently working on an enterprise Oracle to Postgres migration exercise, converting legacy and modern application codebases. I created this custom agent to help the multiple developers on the team with instruction, guidance and achieving more consistent results.

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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.

[Copilot]

Pull request overview

Adds a new “Oracle-to-PostgreSQL Migration Expert” plugin to the Awesome Copilot collection, providing an agent plus a set of migration-focused skills and reference material for Oracle→PostgreSQL work in .NET codebases.

Changes:

• Added a new custom agent definition for Oracle→PostgreSQL migrations.
• Added multiple new migration skills (planning, scaffolding tests, creating tests, stored procedure migration, bug reporting, and review guidance) plus supporting reference docs.
• Registered the new plugin/agent/skills in the docs tables and plugin marketplace metadata.

Reviewed changes

Copilot reviewed 25 out of 25 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
skills/scaffolding-oracle-to-postgres-migration-test-project/SKILL.md	New skill to scaffold an xUnit integration test project for migration validation.
skills/reviewing-oracle-to-postgres-migration/references/postgres-refcursor-handling.md	Reference doc on refcursor client handling differences.
skills/reviewing-oracle-to-postgres-migration/references/postgres-concurrent-transactions.md	Reference doc on Npgsql single-active-command constraints.
skills/reviewing-oracle-to-postgres-migration/references/oracle-to-postgres-type-coercion.md	Reference doc on PostgreSQL strict type coercion vs Oracle implicit conversions.
skills/reviewing-oracle-to-postgres-migration/references/oracle-to-postgres-to-char-numeric.md	Reference doc on TO_CHAR(numeric) migration patterns.
skills/reviewing-oracle-to-postgres-migration/references/oracle-to-postgres-timestamp-timezone.md	Reference doc on timestamp/timezone handling and Npgsql configuration guidance.
skills/reviewing-oracle-to-postgres-migration/references/oracle-to-postgres-sorting.md	Reference doc on ordering differences and PostgreSQL DISTINCT ordering constraints.
skills/reviewing-oracle-to-postgres-migration/references/oracle-parentheses-from-clause.md	Reference doc on Oracle-only FROM-clause parentheses patterns.
skills/reviewing-oracle-to-postgres-migration/references/no-data-found-exceptions.md	Reference doc on SELECT INTO “no data found” behavior differences.
skills/reviewing-oracle-to-postgres-migration/references/empty-strings-handling.md	Reference doc on empty string vs NULL behavior differences.
skills/reviewing-oracle-to-postgres-migration/references/REFERENCE.md	Index file tying the review skill’s reference docs together.
skills/reviewing-oracle-to-postgres-migration/SKILL.md	New skill to review/validate migrations using the bundled reference insights.
skills/planning-oracle-to-postgres-migration-integration-testing/SKILL.md	New skill to produce an integration testing plan for a target project.
skills/migrating-oracle-to-postgres-stored-procedures/SKILL.md	New skill to translate Oracle PL/SQL procedures to PostgreSQL PL/pgSQL.
skills/creating-oracle-to-postgres-migration-integration-tests/SKILL.md	New skill to generate DB-agnostic integration tests for migrated data access code.
skills/creating-oracle-to-postgres-migration-bug-report/references/BUG-REPORT-TEMPLATE.md	Bug report template reference for migration defects.
skills/creating-oracle-to-postgres-migration-bug-report/SKILL.md	New skill to create structured bug reports for migration issues.
skills/creating-oracle-to-postgres-master-migration-plan/SKILL.md	New skill to inventory/classify projects in a .NET solution for migration.
plugins/oracle-to-postgres-migration-expert/README.md	Plugin documentation describing included agent/skills and usage.
plugins/oracle-to-postgres-migration-expert/.github/plugin/plugin.json	Plugin manifest registering the agent and skills.
docs/README.skills.md	Adds the new skills to the skills documentation index.
docs/README.plugins.md	Adds the new plugin to the plugins documentation index.
docs/README.agents.md	Adds the new agent to the agents documentation index.
agents/oracle-to-postgres-migration-expert.agent.md	New agent definition for migration guidance and tool-assisted execution.
.github/plugin/marketplace.json	Registers the new plugin in the generated marketplace list.

[Copilot]

Pull request overview

Copilot reviewed 25 out of 25 changed files in this pull request and generated 5 comments.

[aaronpowell]

This is looking great - thanks for taking the time to incorporate the feedback (I know we've been through a few iterations) as I think this will be really usable as a set of skills.

I added one really tiny nitpick change just to ensure that nothing gets missed when working with it, but otherwise it'll be good to merge in.

[PrimedPaul]

Thanks for taking the time @aaronpowell. I will be migrating apps for the foreseeable future and will keep iterating while sticking to the "less is more" ethos.