Files
LumaWeb/experiments/0004-storage-design
wt 0e2b3098df S00-005: Select idb and verify transactional storage failure policies
Changes: Propose ADR 0004 comparing native IndexedDB, idb and Dexie; select idb 8.0.4 with account, transaction, quota, upgrade and key ownership policy. Repair rollback and add injected quota/blocked upgrade checks, exact wrapper lock, runtime guard, license texts and reproduction notes. Preserve historical recovery artifacts.
Validation: Fresh-cache npm ci and npm run check passed on Node 24.21.0/npm 11.19.0; manifest, HTTPS/SHA512 and license checks passed. make check passed 72 tooling tests; tasks.py validate and git diff --check passed. Native browser quota, disk durability and process restart were not tested; ADR remains proposed for independent QA.

Task: S00-005
Agent: auto-storage-0ce544ac4b40
Role: storage
Action: claim
Status: review

Task title: Выбрать IndexedDB wrapper и migration policy
2026-10-15 18:33:15 +07:00
..

Storage design experiment (S00-005)

Synthetic fixtures only. No app adapter, shared contract, secrets or real messages. ADR: docs/decisions/0004-storage-design.md (proposed pending independent QA). RECOVERY.md preserves the earlier interruption inventory; its missing-output notes are historical, superseded by this task's code and evidence.

From this directory, using Node 24.21.0 and bundled npm 11.19.0:

npm ci --ignore-scripts --no-audit --no-fund --cache /tmp/luma-storage-review-cache --fetch-retries=0 --fetch-timeout=15000
npm run check

check refuses other Node/npm versions. Lockfile pins idb 8.0.4 (ISC) and fake-indexeddb 6.2.5 (Apache-2.0), with HTTPS URLs/SHA512 integrity and no transitives. .npmrc retains verified TLS. Runtime dependencies are isolated to this experiment. Full license texts are in licenses/; production distributions must preserve idb's notice. fake-indexeddb is a test fixture and must not enter production paths.

  • src/rollback.mjs: actual unique-index ConstraintError, failed upgrade rollback, complete schema/data assertions, corrected retry and same-process connection reopen.
  • src/quota-blocked.mjs: explicitly injected quota error after successful requests, multi-store abort/checkpoint invariance, account B preservation, retry/reopen; held old connection, versionchange/blocked and release; stale-version refusal.
  • src/_probe.mjs: preserved exploratory native-API fixture, outside check suite.

Each fixture uses its own synthetic database name and deletes it before/after. The blocked scenario has a 3-second failure deadline. CI should impose an overall process timeout as well. Exceptions/assertion failures cause nonzero exit; PASS text is printed only after the corresponding assertions.

fake-indexeddb is in memory. Quota fault injection checks the policy response and real fixture transaction abort, not a native request/commit QuotaExceededError. Reopen is not process restart. No real browser was available (empty inventory). Browser multi-tab, physical quota/disk failure, crash/restart, eviction and StorageManager permission/persistence grants remain external integration checks. Future browser testing should use a disposable isolated origin/profile, repeat the schema and blocked scenarios on native IDB, then validate request/commit quota failures and restart persistence without filling a user's normal origin. No TLS, CORS or encryption workaround is required or authorized.