---
id: TASK-85
title: Refactor large files for maintainability and readability
status: In Progress
assignee: []
created_date: '2026-02-19 09:46'
updated_date: '2026-02-19 10:01'
labels:
  - architecture
  - refactor
  - maintainability
dependencies: []
priority: medium
---

## Description

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Several core files are oversized and high-coupling (`src/main.ts`, `src/anki-integration.ts`, `src/config/service.ts`, `src/core/services/immersion-tracker-service.ts`). This task tracks phased, behavior-preserving decomposition plus guardrails and generated-launcher workflow cleanup.
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## Suggestions

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- Use seam tests before each extraction.
- Keep `src/main.ts` + `src/anki-integration.ts` as thin composition/coordinator layers.
- Formalize `subminer` as generated artifact only.
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## Action Steps

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1. Add file-budget guardrails and baseline report.
2. Split `src/main.ts` into runtime domain modules.
3. Split `src/anki-integration.ts` into focused collaborators.
4. Split `src/config/service.ts` by load/migrate/validate/warn phases.
5. Split immersion tracker service by state, persistence, sync responsibilities.
6. Clarify generated launcher artifact workflow and docs.
7. Run full build/test gate and publish maintainability report.
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## Acceptance Criteria
<!-- AC:BEGIN -->
- [ ] #1 `src/main.ts` reduced to orchestration-focused module with extracted runtime domains
- [ ] #2 `src/anki-integration.ts` reduced to facade with helper collaborators
- [ ] #3 Config and immersion tracker services decomposed without behavior regressions
- [ ] #4 `subminer` generated artifact ownership/workflow documented and enforced
- [ ] #5 Full build + config/core tests pass after refactor
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## Definition of Done
<!-- DOD:BEGIN -->
- [ ] #1 Plan at `docs/plans/2026-02-19-repo-maintainability-refactor-plan.md` executed or decomposed into child tasks
- [ ] #2 Regression coverage added for extracted seams
- [ ] #3 Docs updated for architecture and contributor workflow changes
<!-- DOD:END -->