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+---
+phase: 06-preset-data-first-run-detection-and-db-safety
+plan: "02"
+subsystem: data
+tags: [presets, i18n, static-data]
+dependency_graph:
+  requires: []
+  provides: [PresetItem, PRESETS]
+  affects: [src/data/presets.ts, src/i18n/en.json, src/i18n/de.json]
+tech_stack:
+  added: []
+  patterns: [static-data-module, i18n-dot-path]
+key_files:
+  created:
+    - src/data/presets.ts
+  modified:
+    - src/i18n/en.json
+    - src/i18n/de.json
+decisions:
+  - "item_tier restricted to fixed|variable only (no one_off) to match DB check constraint on template_items"
+  - "presets.{type}.{slug} i18n key structure matches type+slug fields in PRESETS array"
+metrics:
+  duration: "~5 minutes"
+  completed: "2026-04-20"
+  tasks_completed: 2
+  files_changed: 3
+---
+
+# Phase 06 Plan 02: Preset Data Library Summary
+
+Static 19-item preset budget library with English and German translations, structured as `presets.{type}.{slug}` i18n keys matching the PRESETS array shape.
+
+## Tasks Completed
+
+| Task | Name | Commit | Files |
+|------|------|--------|-------|
+| 1 | Create src/data/presets.ts | 3bc7782 | src/data/presets.ts (created) |
+| 2 | Add preset translations to en.json and de.json | d235080 | src/i18n/en.json, src/i18n/de.json |
+
+## What Was Built
+
+`src/data/presets.ts` exports `PresetItem` interface and `PRESETS` array with exactly 19 items:
+- 4 income, 4 bill, 5 variable_expense, 2 debt, 2 saving, 2 investment
+- All `item_tier` values are `"fixed"` or `"variable"` (no `"one_off"`)
+- Pure static module — no Supabase or React imports
+
+Both i18n files now have a top-level `"presets"` key with nested `{type}.{slug}` structure covering all 19 slugs in English and German.
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Threat Surface Scan
+
+No new network endpoints, auth paths, or trust boundaries introduced. T-06-05 (JSON malformed) mitigated — both files verified valid via `node -e "JSON.parse(...)"` before commit.
+
+## Self-Check: PASSED
+
+- src/data/presets.ts: FOUND
+- src/i18n/en.json "presets" key: FOUND
+- src/i18n/de.json "presets" key: FOUND
+- 19 PRESETS items confirmed (grep '{ slug:' returns 19)
+- no one_off in presets.ts confirmed
+- tsc --noEmit: PASSED
+- Commits 3bc7782 and d235080: confirmed in git log