chore: enable repo automation (CodeRabbit + release-please)

[fatblaine]

What

Promote the repo-automation config from dev to production (main), per docs/planning/repo-automation-plan.md sections B1 + C:

• CodeRabbit — automated AI review on every PR (.coderabbit.yaml)
• release-please — automated versioning, CHANGELOG.md, and GitHub Releases from Conventional Commits

Why

Solo repo with no second reviewer and manual releases. CodeRabbit fills the review gap; release-please turns "hand-write release notes + tag" into "merge one auto-generated Release PR". Both zero-cost, no change to the feat→dev→main flow.

Changes

File	Purpose
.coderabbit.yaml	chill profile, English reviews, auto-review on dev/main, path-scoped instructions aligned to CLAUDE.md (backend/frontend/agent)
.github/release-please-config.json	simple release-type, single app version, changelog-sections mapping commit types → sections
.github/.release-please-manifest.json	Current version pinned to 1.0.0 (auto-maintained after this)
.github/workflows/release-please.yml	Runs on push to main, opens/maintains the Release PR

Activation

Merging this into main is what first activates the release-please workflow (on: push: branches: [main]).

Before/after merge, confirm:

• Settings → Actions → General → Read and write permissions + Allow GitHub Actions to create and approve pull requests are enabled
• Settings → General → Pull Requests → squash default commit message set to "Pull request title" (keeps squash merges Conventional-Commits compliant)

Verification

• After merge, an empty green release-please run appears in Actions — no Release PR yet, since every commit since v1.0.0 is chore: (expected, not a failure).
• Next feat:/fix: reaching main auto-opens a chore(main): release suburblens 1.x.0 PR with a generated CHANGELOG; merging that PR tags the release.

Notes

• Config only — no production code touched.
• CLAUDE.md and docs/planning/ai-changelog.md were updated alongside this work but are gitignored, so they're not in the diff.

[coderabbitai]

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 111edbb1-6eb7-47a4-998f-ec3acada1497

📥 Commits

Reviewing files that changed from the base of the PR and between 02d14cf and 9345aaf.

📒 Files selected for processing (4)

• .coderabbit.yaml
• .github/.release-please-manifest.json
• .github/release-please-config.json
• .github/workflows/release-please.yml

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[Copilot]

Pull request overview

Promotes repository automation configuration to production (main) by enabling CodeRabbit automated PR reviews and adding release-please for Conventional Commits–driven release PRs, changelog generation, and GitHub Releases.

Changes:

• Add release-please GitHub Actions workflow that runs on pushes to main.
• Introduce release-please configuration + manifest to define release behavior and starting version.
• Add CodeRabbit configuration for auto-review on dev/main with path-scoped guidance.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
.github/workflows/release-please.yml	Adds the release-please automation workflow triggered on pushes to main.
.github/release-please-config.json	Configures release-please release type and changelog section mapping.
.github/.release-please-manifest.json	Pins initial release-please manifest version (1.0.0).
.coderabbit.yaml	Enables CodeRabbit auto-review with path-specific review instructions.

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