refactor(ci): reuse Markdown tool setup

[mldangelo-oai]

Summary

Markdown-only CI repeats the package-manager and Node setup already provided by the shared action. Reuse that action with identical versions, cache settings, conditions and ordering.

Changes

• Replace the two setup steps with the existing composite action.
• Keep the CI-scope test checking the consolidated step in all nine existing cases.

Testing

• Fresh release-automation tests passed: 292 cases, including all nine CI-scope cases. Existing actionlint/ShellCheck, zizmor and Prettier checks passed for the unchanged workflow patch.
• The five portable source checks passed. SDK changes passed types and normal formatting; MCP changes passed MCP typecheck and relevant formatting checks.
• The combined integration tree is byte-identical to the previously validated combined tree: both full SDK runs (3,566 passed, 53 skipped each), 209 MCP checks and installed-package checks remain applicable. These full suites were not rerun for this history-only integration.
• Three fresh native reviews and an independent verifier passed for this exact base/head. Hosted CI and Codex/Copilot reviews run on the updated head.

Risk and rollout

No commands, public configuration, dependencies or required jobs change. This is an independent follow-up to the landed build cleanup. Latest main at dff04368 is merged; the workflow contribution is unchanged.

Public disclosure review

• No customer, partner, prospect, or user identities, data, or identifying details are included.
• No credentials, personal data, private source, scan findings, or nonpublic links or tickets are included.
• I reviewed the branch name, title, description, commits, changes, comments, logs, screenshots, attachments, and links for public disclosure.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-04T05:05:26.900996Z	832caec	Manual request
🔒 Security Review	✅ Completed 2026-10-04T05:05:04.108882Z	832caec	New commits

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[mldangelo-oai]

@codex review the current head 0c486e6.

[Copilot]

Copilot review overview

🟢 Approval recommended

The shared action preserves the existing versions, cache configuration, condition, and execution order.

Review effort: Balanced
Findings: None

What changed in this PR

Reuses the shared TypeScript tool setup action for Markdown-only CI without changing behavior.

Changes:

• Consolidates pnpm and Node.js setup into the existing composite action.
• Updates CI-scope tests for the consolidated step.

File	Description
.github/​workflows/​node-ci.yml	Replaces duplicated setup steps with setup-tools.
sdk/​typescript/​tests-ts/​release-automation.test.ts	Updates expected conditional setup step.

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[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Keep them coming!

Reviewed commit: 0c486e66e7

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[mldangelo-oai]

@codex review the current head 832caec.

[Copilot]

Copilot review overview

🟢 Approval recommended

The shared action preserves the previous versions, cache configuration, condition, and execution order.

Review effort: Balanced
Findings: None

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. More of your lovely PRs please.

Reviewed commit: 832caecd50

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".