chore: add renovate config to enable Renovate

[heskew]

What

Adds renovate.json so Renovate manages dependency updates on oauth. The repo had no Renovate (or Dependabot) config; this mirrors the canonical setup used by harper and harper-pro, minus their repo-specific package rules.

Config

• extends: ["config:recommended"]
• Weekly — before 9am Monday (America/New_York)
• Semantic commits; prConcurrentLimit: 2; minimumReleaseAge: 7 days; internalChecksFilter: strict
• automerge: true for grouped minor/patch (excludes 0.x via matchCurrentVersion: "!/^0/"); pinned GitHub Action digests
• reviewersFromCodeOwners: true → future Renovate PRs request the CODEOWNERS (@HarperFast/developers)

Note the automerge: true — it matches harper. For a security-sensitive auth lib you may want to drop it (or scope it to digests only like harper-pro); easy to adjust here before merge.

Heads-up on app scope

Renovate is already installed across the HarperFast org (active renovate[bot] PRs on harper-pro, studio, agent, create-harper, …). If nothing happens after this merges, the Renovate GitHub App may be scoped to selected repositories — in that case, add oauth under org settings → GitHub Apps → Renovate. I couldn't verify the app's repo scope from here (needs admin:org).

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🤖 Generated with Claude Code

[gemini-code-assist]

Code Review

This pull request introduces a new renovate.json configuration file to manage dependency updates. The reviewer identified a potential risk with the global automerge setting, which would automatically merge major version upgrades. They provided a suggestion to restrict automerging to non-major updates to prevent breaking changes from being automatically merged.

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[gemini-code-assist]

Setting "automerge": true at the root level of your Renovate configuration will cause Renovate to automatically merge all dependency updates (including major version upgrades and 0.y.z updates) once they pass tests. For a security-sensitive OAuth library, this is highly risky as major upgrades often introduce breaking changes that might not be fully caught by the test suite.

To mitigate this risk, it is highly recommended to remove "automerge": true from the root level and restrict it only to safe updates, such as non-major dependencies (minor and patch updates for stable versions).

Suggested change

	"automerge": true,
	"reviewersFromCodeOwners": true,
	"lockFileMaintenance": { "enabled": false },
	"packageRules": [
	{
	"groupName": "pin digests",
	"groupSlug": "all-digests",
	"matchDepTypes": ["action"],
	"pinDigests": true
	},
	{
	"groupName": "all non-major dependencies",
	"groupSlug": "all-minor-patch",
	"matchUpdateTypes": ["minor", "patch"],
	"matchCurrentVersion": "!/^0/"
	}
	"reviewersFromCodeOwners": true,
	"lockFileMaintenance": { "enabled": false },
	"packageRules": [
	{
	"groupName": "pin digests",
	"groupSlug": "all-digests",
	"matchDepTypes": ["action"],
	"pinDigests": true
	},
	{
	"groupName": "all non-major dependencies",
	"groupSlug": "all-minor-patch",
	"matchUpdateTypes": ["minor", "patch"],
	"matchCurrentVersion": "!/^0/",
	"automerge": true
	}

[claude]

Reviewed; no blockers found.

[github-actions]

1 blocker found.

1. Global automerge enabled for all updates

File: renovate.json:10
What: The configuration enables automerge: true at the top level, which applies to all dependency updates including major versions and 0.x.x packages.
Why it matters: In 0.x.x versions, minor updates are often breaking, and major updates in stable versions always carry risks. Combined with the project's tsc || true build policy (which allows PRs to pass CI even with type regressions), global automerge could lead to broken code being silently merged into main without human verification.
Suggested fix: Remove automerge: true from the top level (line 10) and move it into the specific packageRules where auto-merging is desired—specifically the all non-major dependencies block (lines 20-25). This ensures that major updates and updates to unstable 0.x.x packages still require manual review.

[dawsontoth]

I agree with Gemini :)