No versioning for custom template updates + add custom template flag

[Linker44]

Ticket Ticket ENG-565

Description Of Changes

We no longer rely on versioning to update custom template connections.
Custom templates will only be replaced if the customer prompts deletion through #7320
Added flags to validate when a template is custom and if it has a fallback template available for deletion.

Code Changes

• Removed replaceable flag.
• Removed reliance on versioning for connection updates.
• Added custom and file_template_available attributes to templates.

Steps to Confirm

1. Upload a custom template for an existing integration (ex: stripe).
2. use the connection types endpoint to list all available templates.
3. verify the uploaded template has custom=true and file_template_available=true.

Pre-Merge Checklist

• Issue requirements met
• All CI pipelines succeeded
• CHANGELOG.md updated
  • Add a db-migration This indicates that a change includes a database migration label to the entry if your change includes a DB migration
  • Add a high-risk This issue suggests changes that have a high-probability of breaking existing code label to the entry if your change includes a high-risk change (i.e. potential for performance impact or unexpected regression) that should be flagged
  • Updates unreleased work already in Changelog, no new entry necessary
• UX feedback:
  • All UX related changes have been reviewed by a designer
  • No UX review needed
• Followup issues:
  • Followup issues created
  • No followup issues
• Database migrations:
  • Ensure that your downrev is up to date with the latest revision on main
  • Ensure that your downgrade() migration is correct and works
    • If a downgrade migration is not possible for this change, please call this out in the PR description!
  • No migrations
• Documentation:
  • Documentation complete, PR opened in fidesdocs
  • Documentation issue created in fidesdocs
  • If there are any new client scopes created as part of the pull request, remember to update public-facing documentation that references our scope registry
  • No documentation updates required

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Project	Deployment	Actions	Updated (UTC)
fides-plus-nightly	Ready	Preview, Comment	Feb 6, 2026 7:28pm

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
fides-privacy-center	Ignored		Feb 6, 2026 7:28pm

[greptile-apps]

Greptile Overview

Greptile Summary

Removes version-based automatic replacement of custom connector templates with file-based templates. Instead of relying on versioning to determine when to replace custom templates, the PR adds two new flags:

• custom: Indicates whether the template is custom-uploaded
• default_connector_available: Indicates whether a Fides-provided default template exists

Key changes:

• Removed replaceable column from custom_connector_template table and all related logic
• Removed automatic version comparison and template replacement in CustomConnectorTemplateLoader._load_connector_templates()
• Added delete_template() method to enable explicit deletion via PR Custom template deletion endpoint #7320
• Updated version syncing to always match file template versions when available (not just for replaceable templates)
• Updated all tests to verify new behavior and remove old replacement tests

Issues found:

• Migration downgrade missing server_default for NOT NULL column - will fail on existing data
• Unused ConnectionConfig import in connector_registry_service.py

Confidence Score: 4/5

• Safe to merge after fixing the migration downgrade issue
• The PR correctly removes version-based replacement logic and adds custom template flags. The changes are well-tested with comprehensive test updates. However, the migration downgrade could fail on existing data without a server_default value.
• The migration file needs server_default added to the downgrade function

Important Files Changed

Filename	Overview
src/fides/api/alembic/migrations/versions/xx_2026_02_05_1741_55ea9941018b_.py	Removes replaceable column from custom_connector_template table. Downgrade adds column back without default value, which could fail on existing data.
src/fides/api/schemas/saas/connector_template.py	Adds custom and default_connector_available fields to templates and list response.
src/fides/api/service/connectors/saas/connector_registry_service.py	Removes version-based replacement logic. Adds delete_template method and flags for custom templates. Unused ConnectionConfig import added.

[greptile-apps]

_{3 files reviewed, 2 comments}

_{Edit Code Review Agent Settings | Greptile}

changes implemented