Append-only consent ledger (GDPR Art. 6/7) — record, withdraw, and gate consent per subject + purpose as a Convex component

Standalone multi-actor signal log (scoped append-only log with per-subscriber cursors), transports, and the transport-conformance suite

Action ledger schema, append-only write helpers, and idempotency primitives for Voyant control surfaces.

Append-only file as TCP service

MikroORM warehouse store for @dudousxd/nestjs-catalog, on MySQL or PostgreSQL: a stored model, append-only snapshot loads, and its own tables managed at boot.

SQLite (WAL) implementation of the v402 storage interface — Drizzle schema, embedded migrations, BEGIN IMMEDIATE write transactions, append-only ledger.

Letopis (летопись): append-only versioned entity store on TimescaleDB with dot-notation chains — every change is a new row, history is first-class (asOf, versions, watch, cascade tombstones)

Append-only session persistence for ti

Tamper-evident append-only audit log for Orqenix scope actions (CR v7.1 Ch.17)

Append-only per-subject activity feed and event ledger, as a Convex component

Record every AI decision as a signed, append-only trail. Every loop leaves a tail.

A structured, append-only task ledger for AI agents.

Hash-chained append-only audit log primitive. sha256(prevHash || payloadHash || ts || seq), canonical-JSON deterministic across Node, browsers, and Python.

Append-only, tamper-evident audit log for the Strav framework

tamper evident append only log. each entry hashes the previous, verify offline

Audit logging module for NestJS with automatic Prisma change tracking and append-only PostgreSQL storage

MongoDB-backed server for db-state: CRUD, append-only log, sync, WebSocket RPC, group-based access objects with row filters and field-level rules, file-based custom methods.

Own-action record: the append-only JSONL log of what the chopsticks runtime itself did (injections, workspace finals, exits, policy conflicts).

Storage interface for the v402 facilitator (identities, deposits, spent requests, append-only ledger, blocklist, watcher cursor, reconciliation) plus an in-memory reference implementation for tests.

LiveChange **service definition** for **collaborative CodeMirror 6** documents: stores document text as **line arrays**, applies incoming **ChangeSet** updates, keeps an append-only **steps** history, and optional **snapshots** for faster replay.