# Next Sprint Planning — quicproquo > Pick 8 of the 24 features below for the next sprint cycle. > Created: 2026-03-04 | Status: PENDING SELECTION ## Completed Sprints (this cycle) | # | Sprint | Commit | Summary | |---|--------|--------|---------| | 4 | Rich Messaging | `81d5e2e` | Read receipts, typing, reactions, edit/delete | | 5 | File Transfer | `3350d76` | Chunked blob upload/download, /send-file | | 6 | Disappearing + Groups | `fd21ea6` | TTL messages, /group-info, deleteAccount | | 7 | Go SDK | `65ff262` | QUIC + Cap'n Proto, 24 RPC methods, 14 API functions | | 8 | TypeScript SDK | `28ceaaf` | 175KB WASM crypto, WebSocket transport, browser demo | | 9 | Mesh Networking | `1b61b7e` | MeshIdentity, store-and-forward, broadcast channels | | 10 | Privacy Hardening | `9244e80` | --redact-logs, traffic padding, /privacy suite, /verify-fs | | 11 | Multi-Device | `9244e80` | Device registry (3 RPCs), /devices, max 5 per identity | ## Current Codebase Stats - **27 Cap'n Proto RPCs** (@0–@26) on NodeService - **10 AppMessage types** (0x01–0x09 + file ref) - **~40 REPL commands** - **Tests**: 72 core + 35 server + 28 P2P + 14 E2E = 149 - **SDKs**: Rust (native), Go, TypeScript/WASM, C FFI, Python ctypes - **Crates**: core, proto, server, client, p2p, bot, gen, kt, plugin-api, gui, mobile, ffi --- ## Feature Candidates (pick 8) ### A. Federation Wiring **Effort**: Medium | **Area**: Server Wire the existing outbound federation relay into the actual delivery flow. When a message targets `user@remote.domain`, the server routes via `FederationClient::relay_enqueue()` instead of local store. Add `/federate ` admin command to configure peers. Test with two server instances. Currently all federation code exists but is marked `#[allow(dead_code)]`. ### B. Contact Management & Blocking **Effort**: Medium | **Area**: Client + Server Contact list with add/remove/block/unblock. Server-side: `addContact @27`, `removeContact @28`, `blockUser @29`, `listContacts @30` RPCs + contacts table. Client: `/contacts`, `/block `, `/unblock `. Blocked users can't enqueue messages to you (server enforces). Import/export contacts as JSON. ### C. Voice/Video Call Signaling **Effort**: High | **Area**: Core + Client WebRTC signaling over MLS for E2E encrypted calls. Add `CallOffer`, `CallAnswer`, `CallIce`, `CallHangup` AppMessage types (0x0A–0x0D). Client REPL: `/call `, `/answer`, `/hangup`. The actual media (audio/video) uses WebRTC peer-to-peer; qpq only handles the encrypted signaling. Include SDP offer/answer exchange and ICE candidate relay. ### D. Encrypted Backup & Restore **Effort**: Medium | **Area**: Client + Core Export all local state (message history, keys, group state) as an encrypted archive. Key derivation from user password via Argon2id. Format: encrypted SQLite dump + identity seed + MLS group states. `/backup ` and `/restore ` commands. Verify integrity on restore. Critical for device migration and disaster recovery. ### E. Group Permissions & Roles **Effort**: Medium | **Area**: Server + Client Admin/moderator/member roles within MLS groups. Server-side role storage per channel. Admins can: remove members, rename group, set TTL policy. Moderators can: mute members. Members can: send messages. `/role admin|mod|member`, `/mute `. Enforced at both server (RPC level) and client (MLS proposal validation). ### F. Key Transparency Audit Client **Effort**: Medium | **Area**: Client + KT crate Client-side verification of the KT Merkle log. The KT crate (`quicproquo-kt`) already has the Merkle tree and audit log. Add: `/kt audit ` to verify a user's key history is consistent, `/kt monitor` to continuously watch for key changes, `/kt proof ` to fetch and verify inclusion proofs. Alert on unexpected key changes (TOFU violation). ### G. Message Search **Effort**: Low-Medium | **Area**: Client Full-text search over local encrypted message history. Add FTS5 virtual table to the conversation SQLite DB. `/search ` returns matching messages with context, timestamps, and conversation names. `/search in:` for scoped search. Highlight matching terms. Index on message insert. ### H. Server Clustering & HA **Effort**: High | **Area**: Server + Infra Run multiple qpq-server instances behind a shared state layer. Options: shared PostgreSQL backend (replace SQLite for clustered mode), or Raft consensus for delivery queue. Add `--cluster-peers` flag, health-based leader election, delivery queue synchronization. Docker Compose with 3-node cluster. This is the path to production-scale deployment. ### I. Protocol Compliance Testing **Effort**: Medium | **Area**: Testing Comprehensive MLS RFC 9420 compliance test suite. Verify: TreeKEM operations, epoch advancement, proposal/commit sequences, welcome message handling, group context extensions, PSK injection, external joins. Cross-test with other MLS implementations (OpenMLS test vectors). Add to CI. Target: 50+ protocol-level tests covering edge cases. ### J. User Profiles & Status **Effort**: Low | **Area**: Server + Client Profile pictures (stored as blobs), display names, status messages ("Available", "Away", custom text), about/bio text. `updateProfile @27` and `fetchProfile @28` RPCs. Profile data is signed by the identity key for authenticity. `/profile set-name `, `/profile set-status `, `/profile set-avatar `, `/profile ` to view. Cache profiles locally. ### K. Notification Framework **Effort**: Medium | **Area**: Server + Client Per-conversation notification settings: all, mentions-only, muted. Server-side WebPush integration for browser clients (using the TS SDK). Add `updateNotificationSettings @27` RPC. Client: `/mute `, `/unmute`, `/notify mentions-only`. Push notification payload: encrypted sender + conversation hint (no message content). APNs/FCM gateway as a separate microservice. ### L. Mobile App Shell **Effort**: High | **Area**: Mobile + FFI React Native app using the C FFI bindings (quicproquo-ffi). Screens: login, conversation list, chat view, settings. Bridge FFI functions to React Native via NativeModules. Use the existing `qpq_connect`, `qpq_login`, `qpq_send`, `qpq_receive` C API. iOS + Android targets. Alternatively: Flutter with dart:ffi. Includes push notification registration. ### M. Message Threading & Replies **Effort**: Low-Medium | **Area**: Client + Core Threaded conversations within channels. Add `thread_id` field to Chat AppMessage — replies to a message inherit its thread_id (or create one). `/thread ` enters a thread view showing only that thread's messages. `/threads` lists active threads with last activity. Thread-aware notification counts. Local storage: add `thread_id` column to messages table, filter queries by thread. ### N. Cross-Signing & Identity Verification **Effort**: Medium | **Area**: Core + Client Out-of-band identity verification via QR codes and emoji comparison. Generate a short verification code from both parties' identity keys (similar to Signal's safety numbers but interactive). `/verify ` starts a verification session, displays emoji sequence or QR payload. `/verify confirm` marks the contact as verified. Verified contacts show a checkmark. Store verification state locally. Alert if a verified contact's key changes. ### O. Offline Message Queue with Priorities **Effort**: Low-Medium | **Area**: Client Smart offline queue that prioritizes messages when reconnecting. Messages queued while offline get priority levels: critical (key rotation, group ops), normal (chat), low (typing, read receipts). On reconnect, send critical first, then normal, drop stale low-priority. `/outbox` shows pending messages. `/outbox flush` forces immediate send. `/outbox clear` discards unsent. Exponential backoff with jitter for reconnection. ### P. Audit Log & Compliance Export **Effort**: Medium | **Area**: Server Persistent server-side audit log for compliance. Every RPC call logged to a dedicated `audit_events` table: timestamp, identity, operation, result, metadata. Configurable retention policy (30/60/90 days). `qpq-admin audit --from --to --user` CLI to query. Export to JSON/CSV. GDPR data export: `/export-my-data` RPC returns all data the server holds about a user. Separate from redact-logs (this is structured, queryable). ### Q. Bot Framework Enhancements **Effort**: Medium | **Area**: Bot SDK + Server Enhance the existing `quicproquo-bot` crate into a full bot platform. Add: slash command registration (`/weather`, `/poll`, etc.), interactive message components (buttons/selects as structured AppMessage extensions), bot permissions (scoped access tokens), webhook delivery (HTTP POST on events). `BotBuilder` pattern: `Bot::new().command("ping", handle_ping).on_message(handle_msg).run()`. Example bots: echo, reminder, RSS feed. ### R. Tor/I2P Transport **Effort**: High | **Area**: Server + Client + P2P Anonymous transport layer for privacy-critical deployments. Server: listen on Tor hidden service (.onion) via `arti` or `tor` crate, configurable via `--tor-hidden-service`. Client: connect through SOCKS5 proxy to .onion address, `--tor-proxy socks5://127.0.0.1:9050`. P2P mesh: route through Tor for metadata-resistant peer communication. Optional I2P support via SAM bridge. All existing QUIC+TLS works over the tunnel. ### S. Plugin Marketplace & Hot-Reload **Effort**: Medium | **Area**: Server + Plugin API Extend the existing plugin system into a discoverable marketplace. Plugin manifest format (TOML) with name, version, permissions, hooks. `qpq-server --plugin-dir ./plugins/` auto-loads `.so`/`.dylib` files. Hot-reload: watch plugin directory, reload on change without server restart. Plugin isolation: each plugin runs in its own thread with limited Store access. Add `qpq-gen plugin ` scaffolding. Example: spam filter plugin, message archiver. ### T. Stress Testing & Benchmarking Suite **Effort**: Medium | **Area**: Testing + Infra Production-grade load testing tool. Simulate N concurrent clients: register, login, create channels, send/receive at configurable rate. Measure: messages/sec throughput, p50/p95/p99 latency, memory usage, connection limits. `cargo bench` integration for micro-benchmarks (already have some). New `qpq-loadtest` binary: `qpq-loadtest --clients 100 --rate 50/s --duration 60s --server localhost:5001`. Generate HTML report with charts. Identify bottlenecks before production. ### U. Disappearing Media & View-Once **Effort**: Low | **Area**: Client + Core View-once messages that auto-delete after first viewing. Add `ViewOnce` flag to FileRef AppMessage — recipient can view the file/image once, then it's deleted locally. Server-side: auto-delete blob after first download. `/send-once ` command. Display "[view-once media]" placeholder until opened. Prevent screenshots (best-effort: clear clipboard, disable screen recording notification). Extends existing file transfer infrastructure. ### V. Emoji Status & Presence **Effort**: Low | **Area**: Server + Client Lightweight presence system. Users set an emoji + short text status ("🏖️ On vacation", "🔴 Do not disturb", "🟢 Available"). Ephemeral — not stored permanently, expires after configurable duration. `publishPresence` RPC (piggyback on existing `publishEndpoint`). Client poll or push-based presence updates. `/status 🎯 Focusing` to set, `/status` to view, `/who` shows online contacts with their status. No tracking — presence is opt-in and ephemeral. ### W. Markdown & Rich Text Messages **Effort**: Low | **Area**: Core + Client Rich text formatting in messages. Support a subset of Markdown in chat: **bold**, *italic*, `code`, ```code blocks```, ~~strikethrough~~, > quotes, [links](url). Parse on display (client-side only — wire format stays plain text with Markdown syntax). TUI renderer: ANSI escape codes for bold/italic/color. Browser demo: render as HTML. Add `/format on|off` toggle. No changes to MLS or wire protocol — purely presentational. ### X. Invitation Links & QR Codes **Effort**: Low-Medium | **Area**: Server + Client Shareable invitation links for joining the server or a group. `createInvite` RPC generates a time-limited, usage-limited token. Format: `qpq://server:port/invite/TOKEN` or QR code encoding. `/invite create [--expires 24h] [--uses 10]` generates link. `/invite list` shows active invites. `/invite revoke ` cancels. New users can register via invite: `qpq-client --invite qpq://...`. Group invites: generate a link that auto-adds the joiner to a specific group after registration. --- ## Selection Guide **Privacy-first** (maximum anonymity & security): A (federation), D (backup), F (KT audit), N (cross-signing), R (Tor), U (view-once) **Production-ready** (deploy to real users): A (federation), B (contacts), H (clustering), I (compliance), K (notifications), T (stress test) **User experience** (make it feel like a real messenger): B (contacts), C (calls), G (search), J (profiles), V (presence), W (rich text), X (invites) **Mobile launch** (ship an app): D (backup), J (profiles), K (notifications), L (mobile app), X (invites) **Developer ecosystem** (grow the community): Q (bot framework), S (plugin marketplace), T (stress test), I (compliance) **Mesh/Freifunk** (offline-first, decentralized): A (federation), N (cross-signing), O (offline queue), R (Tor) --- ## Selected Features (fill in after choosing) > Replace this section with your 8 picks, then we'll plan sprint assignments. | Sprint | Feature | Notes | |--------|---------|-------| | 12 | | | | 13 | | | | 14 | | | | 15 | | | | 16 | | | | 17 | | | | 18 | | | | 19 | | |