Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

Vote Attribution Bug: Fixed election vote counting - votes were incorrectly attributed to self instead of replying peer, making multi-node elections impossible to win
Follower AppendEntries Stub: Replaced stub handle_follower with proper RpcHandler delegation for term checking, log consistency verification, entry appending, and commit index advancement
Log Truncation No-Op: Implemented actual truncate_log_from to remove conflicting entries when leader sends entries with different terms at same index (Raft Log Matching Property)
Vote Term Ordering: Fixed election livelock risk - now checks log up-to-date BEFORE updating term/voted_for when candidate has higher term
Write-Ahead Ordering: Fixed Log.write/2 to write to WAL before updating in-memory state, ensuring true write-ahead semantics
Segment Durability: Added :file.sync/1 calls after segment append and seal operations for crash safety

ETS Table Leak: Fixed LogMeta to delete ETS table on terminate, preventing resource leaks on restart
Election Reply Tracking: Added peer ID tracking in process dictionary for correlating election RPC replies with sender
Snapshot Transfer: Implemented leader-side snapshot chunk sending with peer status tracking and completion handling

Network Layer: Added RaftEx.Network module for unified local/remote RPC routing with node monitoring
Segment Files: Complete immutable segment file implementation with fsync, recovery, truncation, and deletion
Server Process States: Full implementation of candidate and pre_vote states with election timeout handling
Test Coverage: Added 11 new tests (96 → 107) covering segment writer, network layer, and cluster operations

Added excoveralls, dialyxir, credo for test coverage and static analysis
Added quality and quality.ci aliases for running format, credo, and dialyzer