refactor: remove root node and npm workflow deps

backlog/tasks/task-120 - Replace-node-sqlite-with-libsql-and-remove-Yomitan-Node-wrapper.md

@@ -0,0 +1,35 @@
+---
+id: TASK-120
+title: 'Replace node:sqlite with libsql and remove Yomitan Node wrapper'
+status: Done
+assignee: []
+created_date: '2026-03-08 04:14'
+updated_date: '2026-03-08 04:39'
+labels:
+  - runtime
+  - bun
+  - sqlite
+  - tech-debt
+dependencies: []
+priority: medium
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+Remove the remaining root Node requirement caused by immersion tracking SQLite usage and the old Yomitan build wrapper by migrating the local SQLite layer off node:sqlite, running the SQLite-backed verification lanes under Bun, and switching the vendored Yomitan build flow to Bun-native scripts.
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+<!-- AC:BEGIN -->
+- [x] #1 Immersion tracker runtime no longer imports or requires node:sqlite
+- [x] #2 SQLite-backed immersion tracker tests run under Bun without Node --experimental-sqlite
+- [x] #3 Root build/test scripts no longer require the Yomitan Node wrapper or Node-based SQLite verification lanes
+- [x] #4 README requirements/testing docs reflect the Bun-native workflow
+<!-- AC:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+Replaced the immersion tracker SQLite dependency with a local libsql-backed wrapper, updated Bun/runtime compatibility tests to avoid process.exitCode side effects, switched Yomitan builds to run directly inside the vendored Bun-native project, deleted scripts/build-yomitan.mjs, and verified typecheck plus Bun build/test lanes (`build:yomitan`, `test:immersion:sqlite`, `test:runtime:compat`, `test:fast`).
+<!-- SECTION:FINAL_SUMMARY:END -->