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+# Proposal: Selective scope for scheduled "Scan All"
+
+**Author:** Soumya Raikwar (@SoumyaRaikwar)
+
+**Discussion:** [https://github.com/goharbor/harbor/issues/22266](https://github.com/goharbor/harbor/issues/22266)
+
+## Abstract
+
+Allow administrators to limit scheduled "Scan All" executions to a subset of artifacts by specifying scope via an optional X-Scan-All-Scope header on schedule create/update. Scope can be defined by project_ids or repositories. When absent, behavior remains unchanged (scan all artifacts).
+
+## Background
+
+Today, the scheduled "Scan All" job scans every artifact in Harbor. In large installations this is resource-intensive and often unnecessary—teams typically need recurring scans only for selected projects or images. There is no built-in way to constrain the scheduled scan set without removing other projects from Harbor or disabling the schedule entirely.
+
+## Proposal
+
+• Introduce an optional request header for schedule create/update: X-Scan-All-Scope
+
+• Supported JSON payloads for the header:
+  ◦ {"project_ids":[number,...]}
+  ◦ {"repositories":[string,...]} where strings are repo references like project/repo or project/repo:tag
+
+• Execution behavior:
+  ◦ If scope header is present, enumerate artifacts only from the specified scope.
+  ◦ If scope header is omitted, retain existing behavior and scan all artifacts.
+
+• Portal (UI):
+  ◦ In Interrogation Services > Vulnerability page, add inputs to pick one or more projects and optionally multi-select repositories. When saving a schedule, the UI sends the scope via X-Scan-All-Scope.
+
+• Backward compatibility:
+  ◦ No changes to existing API schemas; only an optional header. Existing clients keep working unchanged.
+
+## Non-Goals
+
+• Changing the behavior of manual "Scan All now" (remains global in this iteration).
+
+• Adding advanced matching patterns (e.g., wildcards/regex) beyond explicit project/repository selection.
+
+• Persisting complex scope objects beyond what is necessary to execute the schedule and record execution metadata.
+
+## Rationale
+
+• Header vs request body:
+  ◦ Using a header avoids changing the schedule schema and keeps the request body stable/backward compatible.
+  
+  ◦ It lets existing clients ignore the feature safely.
+• Scope shapes:
+  ◦ project_ids aligns with Harbor's internal references and is efficient to resolve.
+  
+  ◦ repositories matches how users think about targets and supports per-tag precision if needed.
+• Compatibility:
+  ◦ Optional feature flag style—no impact when not used.
+
+## Compatibility
+
+• API: Backward compatible. Existing endpoints and payloads remain valid. The optional X-Scan-All-Scope header is additive.
+
+• RBAC: Unchanged—only system admins can configure the "Scan All" schedule.
+
+• Mixed versions: Older clients not sending the header continue scanning all artifacts.
+
+## Implementation
+
+• Backend
+  ◦ Parse X-Scan-All-Scope header JSON on schedule create/update and store it in schedule execution context or scheduler metadata (implementation detail depending on existing scheduler storage).
+  
+  ◦ Extend scan-all controller to accept an optional scope and apply it to the artifact iterator (project-based and repo-based filters).
+  
+  ◦ Record scope summary in execution metadata/logs for observability.
+  
+• Frontend
+  ◦ Add project selection and repository multi-select to the Vulnerability configuration screen.
+  
+  ◦ Send X-Scan-All-Scope on schedule create/update when user selects a scope.
+  
+  ◦ Minor type fix: use the local Project model where needed for compatibility with existing services.
+
+• Testing
+  ◦ Unit tests for scope parsing and filtering logic.
+  
+  ◦ Integration tests for scheduled runs covering: no scope (global), project-scoped, repo-scoped.
+  
+  ◦ UI tests to verify schedule save with/without scope and correct header transmission.
+
+• Documentation
+  ◦ Update API docs to describe X-Scan-All-Scope and provide examples.
+  
+  ◦ Update admin docs to show UI flow for configuring scoped schedules.
+
+
+## Open issues (if applicable)
+
+• Header size limits: Very large lists of repositories may exceed practical header limits. Guidance may be required (e.g., prefer project_ids for broad scoping; keep repo lists manageable).
+
+• Persistence details: Confirm where scope is stored for scheduled jobs (job metadata vs scheduler DB) to ensure it survives restarts and is visible in execution history.
+
+• Error handling/partial scope: Define whether invalid/unauthorized IDs or repositories are ignored with warnings or cause schedule update rejection. Initial suggestion: skip invalid entries, log warnings, and continue with valid targets.
+
+• Future enhancements: Support patterns (e.g., by label or wildcard), and scoping for "Scan All now" as a separate follow-up if community agrees.