ci: grant deployments:write to features workflow

[emptyhammond]

Summary

PR #2228 ("ci: harden workflows") scoped the GITHUB_TOKEN to least privilege. The features.yml build job calls the reusable workflow ably/features/.github/workflows/sdk-features.yml, which declares it requires:

permissions:
  deployments: write
  id-token: write

However features.yml granted only contents: read and id-token: write — missing deployments: write. A called reusable workflow cannot request a permission the caller did not grant, so this caused an invisible failure at workflow startup (the Features job never ran).

This restores the missing deployments: write permission.

Background

Flagged by @VeskeR on ably-dotnet#1328, who noted the same regression landed across multiple SDKs (ably-js, ably-python). Broken ably-js run: https://github.com/ably/ably-js/actions/runs/26302842757

Summary by CodeRabbit

• Chores
  • Updated an automation workflow’s permissions to support deployment-related actions.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: c0904913-e9ac-4767-a1ac-3f7fd99ea99a

📥 Commits

Reviewing files that changed from the base of the PR and between 13bd25d and 8d19aec.

📒 Files selected for processing (1)

• .github/workflows/features.yml

---

Walkthrough

The workflow job permission set was extended to include deployments: write.

Changes

Workflow permissions update

Layer / File(s)	Summary
Add deployments permission .github/workflows/features.yml	The job-level permissions block now includes deployments: write.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• ably/ably-js#2229: Also changes .github/workflows/features.yml permissions in the same workflow, with related checkout credential handling updates.

Suggested reviewers

• owenpearson

Poem

🐰 A little workflow hopped along,
With one new permission in its song.
Deployments now can take their place,
Under CI’s moonlit grace.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the workflow permission change by adding deployments:write to the features CI workflow.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/features-workflow-deployments-permission

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}