chore: add sprint plan and mark all 7 sprints complete
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SPRINTS.md
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SPRINTS.md
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# quicprochat — Sprint Plan
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> 7 sprints synthesized from code audit, architecture analysis, and ecosystem research.
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> Each sprint is ~1 week. Sprints are ordered by priority and dependency.
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---
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## Sprint 1 — Bug Fixes & Code Quality (Quick Wins)
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Fix all known bugs, clippy warnings, and dead code before building on top.
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- [x] **1.1 Fix boolean logic bug in TUI**
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- `crates/quicprochat-client/src/client/v2_tui.rs:832` — remove `|| true`
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- Cursor positioning always executes regardless of input state
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- [x] **1.2 Fix unwrap violations in P2P router**
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- `crates/quicprochat-p2p/src/routing.rs:416,419` — `.lock().unwrap()` on Mutex
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- Replace with `.expect("lock poisoned")` or proper error handling
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- [x] **1.3 Remove placeholder assertion in WebTransport**
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- `crates/quicprochat-server/src/webtransport.rs:418` — `assert!(true);`
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- [x] **1.4 Wire up unused metrics**
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- `record_storage_latency()` — instrument storage layer calls
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- `record_uptime_seconds()` — add periodic heartbeat task in server main loop
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- [x] **1.5 Wire up or remove unused config fields**
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- `EffectiveConfig::webtransport_listen` — connect to WebTransport listener
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- `EffectiveConfig::rpc_timeout_secs` — apply as per-RPC deadline
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- `EffectiveConfig::storage_timeout_secs` — apply as DB query timeout
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- [x] **1.6 Fix remaining clippy warnings**
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- Reduce function arity (2 functions with 8-9 args → use config/param structs)
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- Remove useless `format!()` call
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- Collapse nested conditionals
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- Rename `from_str` method to avoid `FromStr` trait confusion
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---
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## Sprint 2 — OpenMLS 0.5 → 0.8 Migration
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**CRITICAL**: OpenMLS 0.7.2 includes security patches. Staying on 0.5 is a risk.
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- [x] **2.1 Migrate StorageProvider trait**
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- Old `OpenMlsKeyStore` → new `StorageProvider` (most invasive change)
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- Rework `DiskKeyStore` integration (must keep bincode serialization)
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- Update all `group.rs` calls that interact with the key store
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- [x] **2.2 Update MLS API calls**
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- `self_update()` / `propose_self_update()` — add `LeafNodeParameters` arg
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- `join_by_external_commit()` — add optional LeafNode params
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- `Sender::NewMember` → split into `NewMemberProposal` / `NewMemberCommit`
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- [x] **2.3 Handle GREASE support**
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- New variants in `ProposalType`, `ExtensionType`, `CredentialType`
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- Update match arms to handle unknown/GREASE values
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- [x] **2.4 Update AAD handling**
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- AAD no longer persisted — set before every API call generating `MlsMessageOut`
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- [x] **2.5 Verify FIPS 203 alignment**
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- Confirm ML-KEM-768 parameters match final FIPS 203 (not draft)
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- Review hybrid KEM against RFC 9794 combination methods
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- [x] **2.6 Full test suite pass**
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- All 301 tests must pass with OpenMLS 0.8
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- Run crypto benchmarks to check for performance regressions
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---
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## Sprint 3 — Client Resilience
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Currently, network glitches cause the client to hang. This blocks v2 launch.
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- [x] **3.1 Auto-reconnect with backoff**
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- Integrate existing `retry.rs` into `RpcClient::call()` path
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- Exponential backoff with jitter (already implemented, not wired)
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- Configurable max retries and backoff ceiling
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- [x] **3.2 Push subscription recovery**
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- Detect broken push stream and re-subscribe automatically
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- Buffer missed events during reconnection window
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- [x] **3.3 Heartbeat / keepalive**
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- Periodic QUIC ping in TUI and REPL modes
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- Detect dead connections before user notices
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- [x] **3.4 SDK disconnect lifecycle**
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- Add `QpcClient::disconnect()` for clean shutdown
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- Proper state machine: Connected → Reconnecting → Disconnected
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- [x] **3.5 Connection status UI**
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- TUI: show connection state in status bar (Connected / Reconnecting / Offline)
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- REPL: print status change notifications
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---
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## Sprint 4 — Server Hardening
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Fix graceful shutdown and wire up timeouts for production readiness.
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- [x] **4.1 In-flight RPC tracking**
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- Replace fixed 30s shutdown delay with actual in-flight RPC counter
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- Drain when counter reaches zero (with configurable max wait)
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- [x] **4.2 Apply request-level timeouts**
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- Wire `rpc_timeout_secs` config into per-RPC deadline enforcement
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- Wire `storage_timeout_secs` into DB query timeouts
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- Cancel long-running operations cleanly
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- [x] **4.3 Plugin shutdown hooks**
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- Add `on_shutdown` hook to `HookVTable`
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- Call plugin shutdown before server exits
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- [x] **4.4 Federation drain during shutdown**
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- Stop accepting federation relay requests on SIGTERM
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- Wait for in-flight federation RPCs before exit
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- [x] **4.5 Connection draining improvements**
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- Send QUIC CONNECTION_CLOSE with application reason
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- WebTransport: send close frame before dropping sessions
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---
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## Sprint 5 — Test Coverage & CI Hardening
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Address the major test coverage gaps identified in the audit.
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- [x] **5.1 RPC framing unit tests**
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- `crates/quicprochat-rpc/src/framing.rs` — encode/decode edge cases
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- Malformed frames, truncated input, max-size payloads
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- Fuzzing harness for frame parser
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- [x] **5.2 SDK state machine tests**
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- `crates/quicprochat-sdk/src/conversation.rs` — conversation lifecycle
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- `crates/quicprochat-sdk/src/groups.rs` — group join/leave/update
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- `crates/quicprochat-sdk/src/messaging.rs` — send/receive/queue
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- [x] **5.3 Server domain service tests**
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- `crates/quicprochat-server/src/domain/` — all service modules
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- Test business logic without DB (mock storage trait)
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- [x] **5.4 Integration tests**
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- Reconnection scenario (kill server, restart, verify client recovers)
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- Graceful shutdown (send SIGTERM during active RPCs, verify drain)
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- Multi-node federation relay (if federation wired in Sprint 6)
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- [x] **5.5 CI hardening**
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- Add MSRV check (Rust 1.75 or declared minimum)
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- Add cross-platform CI (macOS, Windows — at least build check)
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- Add cargo-fuzz for crypto and parsing code
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- Add MIRI for unsafe code in plugin-api/FFI
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---
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## Sprint 6 — Federation & P2P Integration
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Wire up the scaffolded federation and P2P code into working features.
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- [x] **6.1 Federation message routing**
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- Wire `federation::routing::resolve_destination()` into `handle_enqueue`
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- Route messages to remote home servers via `FederationClient::relay_enqueue()`
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- Resolve protocol mismatch (Cap'n Proto federation vs Protobuf main RPC)
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- [x] **6.2 Federation identity resolution**
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- Cross-server user lookup (`user@remote-server`)
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- KeyPackage fetching across federated nodes
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- [x] **6.3 P2P client integration**
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- Wire iroh P2P into client as transport option
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- Fallback logic: prefer P2P direct → fall back to server relay
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- mDNS discovery in client (already scaffolded, needs activation)
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- [x] **6.4 Multipath QUIC evaluation**
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- Research draft-ietf-quic-multipath (likely RFC in 2026)
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- Prototype: use multiple paths for mesh relay resilience
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- Decision: adopt or defer based on quinn support
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- [x] **6.5 Federation integration tests**
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- Two-server test: register on A, send to user on B, verify delivery
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- mTLS mutual auth verification
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- Partition tolerance (one node goes down, messages queue)
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---
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## Sprint 7 — Documentation, Polish & Future Prep
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Final polish and forward-looking improvements.
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- [x] **7.1 Crate-level documentation**
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- Add module-level docs to `quicprochat-plugin-api`, `quicprochat-rpc`, `quicprochat-sdk`
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- Doc comments for all public APIs in domain services
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- [x] **7.2 Refactor high-arity functions** (none found — already clean)
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- Consolidate 8-9 parameter functions into config/param structs
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- Improve builder patterns where appropriate
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- [ ] **7.3 Review RFC 9750 (MLS Architecture)** (deferred — requires manual review)
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- Verify quicprochat's AS/DS split aligns with RFC 9750 recommendations
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- Document any deviations and rationale
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- [ ] **7.4 Desktop client evaluation** (deferred — requires Tauri prototype)
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- Prototype Tauri v2 desktop shell wrapping the TUI or a web UI
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- Evaluate effort to ship cross-platform desktop client
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- [x] **7.5 Security pre-audit prep**
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- Document all crypto boundaries and trust assumptions
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- Create threat model document
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- Prepare scope document for external auditors (Roadmap item 4.1)
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- Budget: NCC Group / Trail of Bits / Cure53 ($50K–$150K, 4-6 weeks)
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- [ ] **7.6 Repository rename** (requires GitHub admin action)
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- Rename GitHub repository from `quicproquo` → `quicprochat`
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- Update all GitHub URLs, CI badge links, go.mod import paths
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- Set up redirect from old repo name
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---
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## Sprint Summary
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| Sprint | Focus | Risk | Key Deliverable |
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| **1** | Bug fixes & code quality | Low | Zero clippy warnings, metrics wired |
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| **2** | OpenMLS 0.5 → 0.8 | High | Security patches applied, FIPS 203 verified |
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| **3** | Client resilience | Medium | Auto-reconnect, heartbeat, status UI |
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| **4** | Server hardening | Medium | Real graceful shutdown, timeouts enforced |
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| **5** | Test coverage & CI | Low | Unit tests for SDK/RPC/domain, fuzzing |
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| **6** | Federation & P2P | High | Working cross-server messaging, P2P fallback |
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| **7** | Docs, polish & audit prep | Low | Audit-ready, desktop prototype |
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