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backlog/archive/tasks/task-30.1 - Design-extension-source-config-model-and-defaults.md

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+---
+id: TASK-30.1
+title: Design extension source config model and defaults
+status: To Do
+assignee: []
+created_date: '2026-02-13 18:32'
+updated_date: '2026-02-13 18:34'
+labels: []
+dependencies: []
+parent_task_id: TASK-30
+priority: high
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+Define a backend-agnostic configuration contract for extension repository streaming, including resolver endpoints/process mode, query/auth headers, timeouts, enable flags, and source preference. Wire schema through Config/ResolvedConfig and generated template/defaults so users can manage repos entirely through config.
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+<!-- AC:BEGIN -->
+- [ ] #1 Add new config sections for extension source providers in Config and ResolvedConfig types.
+- [ ] #2 Add validation defaults and env-compatible parsing for provider list, auth, header overrides, and feature flags.
+- [ ] #3 Update config template and docs text so defaults are discoverable and editable.
+- [ ] #4 Invalid/missing config should fail fast with a clear message path.
+- [ ] #5 Existing config readers do not regress when no providers are configured.
+<!-- AC:END -->
+
+## Implementation Notes
+
+<!-- SECTION:NOTES:BEGIN -->
+Phase 1 — Foundation: config contract + validation + defaults
+<!-- SECTION:NOTES:END -->
+
+## Definition of Done
+<!-- DOD:BEGIN -->
+- [ ] #1 Config examples in template/docs include at least one provider entry shape.
+- [ ] #2 Defaults remain backward-compatible when key is absent.
+- [ ] #3 Feature can be disabled without touching unrelated settings.
+<!-- DOD:END -->