plugin: point Apple Dev Skills to Socket

[gaelic-ghost]

Summary

• point the standalone Apple Dev Skills marketplace at the Socket-hosted plugin payload
• replace the README with compatibility and Socket install guidance
• add a regression test for the compatibility marketplace source

Verification

• bash .github/scripts/validate_repo_docs.sh
• uv run pytest
• local compatibility marketplace smoke with isolated CODEX_HOME

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 26cf2685-64b1-425f-b8b6-550a34978836

📥 Commits

Reviewing files that changed from the base of the PR and between fc6f436 and c7ff0dc.

⛔ Files ignored due to path filters (1)

• uv.lock is excluded by !**/*.lock

📒 Files selected for processing (7)

• .agents/plugins/marketplace.json
• .codex-plugin/plugin.json
• .github/scripts/validate_repo_docs.sh
• AGENTS.md
• README.md
• pyproject.toml
• tests/test_compatibility_marketplace.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch plugin/socket-compat-marketplace

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[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: c7ff0dcc10

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• Comment "@codex review".

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[chatgpt-codex-connector]

Use a supported marketplace source type

When Codex discovers this repo marketplace, this entry is rejected before it can redirect users to Socket. I checked Codex's marketplace parser (codex-rs/core/src/plugins/marketplace.rs): RawMarketplaceManifestPluginSource is an internally tagged enum with only the local variant, so source: "git-subdir" deserializes as an unknown variant. As a result, users following codex plugin marketplace add gaelic-ghost/apple-dev-skills cannot load or install the compatibility marketplace entry.

Useful? React with 👍 / 👎.