refactor: flatten template choice executor

[chhoumann]

Summary

• Converts TemplateChoiceEngine into a flat executor composed from explicit services/evaluators.
• Preserves template file creation, append/overwrite, folder selection, and formatter behavior.
• Adds validation coverage for rejected/missing folder selections.

Stack

1. engine-flat/01-vault-frontmatter-services
2. engine-flat/02-formatter-template-services
3. This PR
4. engine-flat/04-capture-choice
5. engine-flat/05-macro-cutover

Validation

• bun run lint
• bun run test
• bun run build
• Obsidian dev vault plugin reload and e2e validation

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: eaafadf4-c65e-446c-b5ba-152d1cfe87a8

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch engine-flat/03-template-choice

Tip

💬 Introducing Slack Agent: The best way for teams to turn conversations into code.

Slack Agent is built on CodeRabbit's deep understanding of your code, so your team can collaborate across the entire SDLC without losing context.

• Generate code and open pull requests
• Plan features and break down work
• Investigate incidents and troubleshoot customer tickets together
• Automate recurring tasks and respond to alerts with triggers
• Summarize progress and report instantly

Built for teams:

• Shared memory across your entire org—no repeating context
• Per-thread sandboxes to safely plan and execute work
• Governance built-in—scoped access, auditability, and budget controls

One agent for your entire SDLC. Right inside Slack.

👉 Get started

---

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 and usage tips.}

[cloudflare-workers-and-pages]

Deploying quickadd with    Cloudflare Pages

Latest commit:	b9766b9
Status:	✅  Deploy successful!
Preview URL:	https://0778b374.quickadd.pages.dev
Branch Preview URL:	https://engine-flat-03-template-choi.quickadd.pages.dev

View logs

[chhoumann]

Closing this stack after deciding not to continue with this refactor direction.