## [Unreleased]

### Added

- **`raxol_symphony` Phases 0-14** -- Elixir/OTP port of OpenAI Symphony. Tracker-driven coding-agent orchestrator with two runner backends (`Runners.RaxolAgent` default; `Runners.Codex` Port-based JSON-RPC for parity with upstream Symphony Elixir) and six surfaces (terminal dashboard, LiveView, MCP tools + `symphony://runs` resource, Telegram per-issue session router, Watch push, JSON `/api/v1/*`). Workflow hot-reload via `WorkflowStore`, Linear (GraphQL) + GitHub Issues (state labels) trackers, evidence framework (`Evidence.GitHub` CI/PR comments, `Evidence.Complexity` cloc/SLOC fallback, `Evidence.Recording` cast scan), in-run asciinema capture (`Evidence.Capture` writes `<workspace>/.raxol_symphony/run-<attempt>.cast` per dispatch when `recording.enabled: true`). 399 tests, 0 failures. Pre-alpha, path-dep.
- **`raxol_acp` v0.1 (engineering complete)** -- First Elixir/OTP-native Virtuals Agent Commerce Protocol implementation. Job lifecycle (`Job.{Server, StateMachine, Memo, Store, Supervisor, Registry}`), EIP-712 typed-data memos via `Raxol.Payments.EIP712`, on-chain client (`ContractClient.Onchain` over Req JSON-RPC, EIP-1559 typed-tx signing, Yellow-Paper RLP, log decoder for `create_job` job_id extraction), Seller stack (`Backend.InMemory` + `Queue` + `Runtime` + `Supervisor`, opt-in via `:seller_enabled`), `Wallet.NonceServer` for serialized nonce assignment, `mix raxol_acp.bench` sandbox-graduation harness. Optional DETS-backed `Job.Store` durability. 256 tests, 0 failures. Pre-alpha, path-dep. External-blocked: real ACP contract ABIs, `Wallet.SCA`, `Seller.Backend.WebSocket`.
- **`Raxol.Payments.Wallet.sign_hash/1`** -- new behaviour callback for EIP-1559 transaction signing (sign-precomputed-digest semantics). `Wallets.Env` and `Wallets.Op` both implement.

## [2.4.0] - 2026-04-14

### Added

- **Phase 14B: Xochi Integration** -- Xochi as default agent-facing protocol for cross-chain payments. Cash-positive with tier-based fees (0.10-0.30%). Riddler solves intents behind the scenes.
  - `Raxol.Payments.Xochi.Client` -- HTTP client for Xochi intent API (quote, execute, status, history)
  - `Raxol.Payments.Xochi.Schemas` -- 5 typed structs (QuoteRequest, QuoteResponse, ExecuteRequest, ExecuteResponse, IntentStatus)
  - `Raxol.Payments.Protocols.Xochi` -- full intent flow: `get_quote/2` -> `execute/3` (EIP-712 wallet signing) -> `poll_status/3`
  - `Raxol.Payments.Riddler.Client` -- Commerce API client (B2B/direct solver access, not default)
  - `Raxol.Payments.Router` -- cross-chain routes to `:xochi`, privacy to `:xochi`, same-chain stays `:x402`
- **Phase 14C: PXE-Bridge Integration** -- Aztec Private eXecution Environment as settlement target for high-trust privacy tiers.
  - `Raxol.Payments.Pxe.Client` -- JSON-RPC 2.0 client (aztec_createNote, aztec_getVersion, /status)
  - `Raxol.Payments.Pxe.Schemas` -- CreateNoteParams, CreateNoteResult, HealthStatus
  - `Raxol.Payments.PrivacyTier` -- Glass Cube model (6 tiers: open, public, standard, stealth, private, sovereign), attestation gating, downgrade logic
  - Router settlement routing with trust-score-aware privacy depth
- **Phase 14D: Stealth Settlement** -- Full ERC-5564/ERC-6538 in `Xochi.Stealth` (~300 LOC).
  - ECDH stealth address derivation (secp256k1)
  - View tag scanning (256x speedup, 1:256 false positive rate)
  - Domain-separated key derivation from EVM signature
  - Meta-address encode/decode (st:eth:0x format)
  - 44 tests (32 unit + 12 e2e), stress-tested 500 round-trips at 0% failure
- **Phase 14E: ZKSAR + Trust Tiers** -- Zero-knowledge attestation verification and trust scoring.
  - `Raxol.Payments.Zksar` -- 6 ZK proof type verification (type, expiry, issuer, structure), batch verify, JSON parsing
  - `Raxol.Payments.Zksar.TrustScore` -- diminishing-returns aggregation: `score = sum(weight_i / ln(rank + 1))`, capped at 100
  - PrivacyTier attestation requirements per tier, downgrade logic
  - Router attestation-aware routing with `trust_score_for/1`
- **AutoPay wiring** -- `Backend.HTTP` accepts `:req_plugins` for transparent HTTP 402 handling. `Raxol.Payments.Req.AgentPlugin.auto_pay/1` builds the closure.
- **Riddler solver wiring (ADR-0005)** -- Complete on both sides. 9 Xochi endpoints, fee policy (5 tiers + privacy premiums), stealth/ERC-4337 settlement, ZKSAR attestation, EIP-712 typed data. 119 Riddler tests + 347 raxol_payments tests.
- **raxol_liveview package** -- TerminalBridge, TEALive, TerminalComponent, 5 themes, CSS asset. 37 tests.
- **raxol_plugin package** -- `use Raxol.Plugin` macro, API facade, Manifest, Testing helpers, generator. 50 tests.
- **Hex publishing readiness** -- All packages at v2.4.0 with LICENSE.md, README.md, package metadata, version-constrained path deps. Publishing order: raxol_sensor + raxol_core -> raxol_terminal/mcp/plugin/liveview -> raxol -> raxol_agent -> raxol_payments.

### Changed

- Deprecated `Protocols.Riddler` -- now delegates to Xochi internally
- All sub-packages bumped to v2.4.0 (raxol_payments stays at 0.1.0)
- Path deps now include version constraints (`~> 2.4`) for Hex compatibility

### Fixed

- **Dashboard demo** -- `status_dot/1` used identical character for all scheduler load levels; now uses distinct ASCII indicators per threshold
- **String.to_atom on external input** -- Replaced 6 unsafe catch-all `String.to_atom(s)` in schema parsers with explicit clauses + `:unknown`/`nil` fallback
- **Duplicated `maybe_put/3`** -- Extracted to `Schemas.put_non_nil/3` shared helper
- **Dialyzer specs** -- Tightened `{:error, term()}` to actual error tuple shapes in `metrics.ex`
- **QuoteRequest validation** -- Added `validate/1` with eth address format checks
- **Attestation filtering** -- PrivacyTier now filters attestations by `valid: true`

## [2.3.2] - 2026-03-30

### Added

- **Headless session manager** (`Raxol.Headless`) -- GenServer managing non-interactive TEA app instances in `:agent` environment. Start from module or .exs file, take text screenshots, send keystrokes, read model state. Used by MCP tools and future test harness.
- **MCP tools for Claude Code** -- 6 tools (`raxol_start`, `raxol_screenshot`, `raxol_send_key`, `raxol_get_model`, `raxol_stop`, `raxol_list`) injected into Tidewave at dev startup. Tidewave MCP proxy script for stdio transport.
- **ADR-0012: MCP as Rendering Target** -- Architecture decision formalizing MCP as a first-class rendering target. Automatic tool derivation from widget tree via ToolProvider behaviour, focus lens with mouse tracking, context tree as MCP resources, agent-MCP symmetry, multi-surface cockpit vision (terminal, MCP, Telegram, speech, watch). Category theory foundations for design and property-based test invariants.
- **SPECS.md Phases 8-11** -- raxol_mcp package, ToolProvider + tool derivation, context tree + resources, MCP test harness.
- **Playground resize handling** -- Fixed resize event propagation in playground demos.

### Changed

- Updated `docs/core/ARCHITECTURE.md` with MCP rendering target section
- Updated `CLAUDE.md` with raxol_mcp package, dependency graph, and consolidated namespace
- Updated `IDEAS.md` with MCP architecture, functor family, multi-surface cockpit, category theory
- Updated `docs/adr/README.md` with ADR-0012 and new "AI & MCP" category
- Dispatcher and Engine refactored under 800 LOC each
- Credo strict: 0 issues (was 373, resolved via function extraction and pattern matching)

## [2.3.0] - 2026-03-27

182 commits, 1,030 files changed, net -39K LOC (89,793 insertions, 129,283 deletions).

### Added

- **Distributed swarm subsystem** -- libcluster integration with gossip, EPMD, DNS, and custom Tailscale strategy. CRDTs (LWW-Register, OR-Set) for shared state. Node health monitoring, seniority-based leader election, bandwidth-aware message routing. 11 modules, 2,100+ lines.
- **AI agent framework** -- `use Raxol.Agent` for TEA-based agents with OTP supervision. Agent discovery via Registry, typed inter-agent messaging, headless or rendered. Three command types: async (SSE streaming), shell (Port), inter-agent. Team supervision via `Agent.Team`. Backend.HTTP streams across Anthropic, OpenAI, Ollama, Kimi, and Lumo (U2L encryption). Tiered fallback detection.
- **Interactive playground** -- 28 demos across 8 categories (input, display, feedback, navigation, overlay, layout, visualization, effects). Search, filter by category/complexity, help overlay. Charts as View DSL widgets. SSH serving with `mix raxol.playground --ssh`.
- **Time-travel debugging** -- `Raxol.start_link(MyApp, time_travel: true)` snapshots every `update/2` cycle into a circular buffer. Step back/forward, jump to any point, restore state. Recursive map diffing. Zero cost when disabled.
- **Session recording and replay** -- Asciinema v2 format. Capture with timestamps, replay with pause/seek/speed controls. Stream replay.
- **Sandboxed REPL** -- `Code.eval_string` with spawn_monitor timeout, IO capture via group_leader swap, persistent bindings. Three sandbox levels: unrestricted, standard, strict (whitelist-only, safe for SSH). Available as `mix raxol.repl`.
- **Nx/Axon adaptive ML** -- Optional Nx vectorized fusion, Axon MLP recommender for layout, FeedbackLoop training. Gated behind `Code.ensure_loaded?`.
- **Plugin system** -- Phase 1 mission plugin system (4 modules) with lifecycle management
- **AGI Cockpit Console** -- Phase 2 cockpit with uptime panel, dependency checker, crash recovery, state machine
- **`mix raxol.new`** -- Project generator with 4 templates (basic, phoenix, ssh, agent)
- **`mix raxol.demo`** -- 4 built-in runnable demos
- **`mix raxol.check`** -- Unified quality gate (format, compile, credo, dialyzer, security, test)
- **Benchmark suite** -- Comparative benchmarks against Ratatui, BubbleTea, and Textual
- **746+ new tests** across 21 modules (357 for core, 233 for runtime, 156 for plugins, 84 for converter/keyboard/engine/shutdown/initializer/scheduler)
- Mouse click hit testing for buttons
- Agent semantic view tree
- Unified image facade + View DSL `image/1`
- Event capture phase (W3C-style dispatch), event bubbling, style inheritance through component tree
- HEEx parser for terminal compilation
- Sixel real dithering + image cache
- CODE_OF_CONDUCT.md, SECURITY.md

### Fixed

- 3 real bugs found via test coverage: converter pipe BadMapError, keyboard CaseClauseError on quit/debug, unreachable ctrl_c/ctrl_q clauses
- 6 flaky CI tests (Registry race conditions, ETS cleanup, JIT warmup timing, behavior_tracker race)
- Windows CI (GPG path separators, IOTerminal backend)
- Input parser multi-byte sequences + mouse tracking
- REPL sandbox hardening, capped eval history

### Changed

- Deleted ~35K lines of dead code (CQRS, EventSourcing, Pipeline, stale stubs)
- Phoenix is now an optional dependency
- All examples modernized to TEA pattern
- Zero credo warnings, zero dialyzer regressions
- Refactored large files into focused submodules (CSI handlers, sensor, adaptive, orchestrator)
- 6,484 tests passing, 0 failures, 74 excluded by environment

## [2.2.0] - 2026-03-22

### Added

- Widget examples for Viewport, CodeBlock, MarkdownRenderer, MultiLineInput
- Modal test file (22 tests) and Terminal test file (16 tests) verified

### Changed

- Rewrote `examples/apps/todo_app.ex` from broken LiveView/HEEx to TEA pattern
- Hex package readiness: `mix hex.build` succeeds (1.8MB)
- 14 deps marked optional (Ecto, PostGres, bcrypt, mogrify, contex, HTTPoison, ex_cldr, phoenix_ecto)
- Excluded compiled `.so`/`.o` binaries from hex package
- Moved esbuild/dart_sass to dev-only
- Replaced `Ecto.UUID.generate()` with `UUID.uuid4()` in emulator struct
- Updated package description

## [2.1.0] - 2025-02-27

### Added

- **ScreenBuffer.Scroll Module** - Complete scroll operations for terminal buffer
  - Scroll region management (set/get scroll regions)
  - Basic scroll operations (scroll_up/down with configurable line counts)
  - Region-specific scrolling (scroll within defined regions)
  - Scrollback buffer management (save, clear, get with limits)
  - Scroll position tracking for viewing history
  - VT100 index operations (IND/RI for cursor-triggered scrolling)

- **Core.Performance Module** - ETS-backed performance statistics tracking
  - Frame timing and FPS calculation
  - Memory usage monitoring
  - Sample-based metrics with configurable limits
  - Non-blocking initialization (works without GenServer)

### Fixed

- **Dialyzer Errors** - Resolved all dialyzer warnings in plugin modules
  - plugin_supervisor: Explicit handling of Task.Supervisor return values
  - beam_analyzer: Precise error types for analysis_result
  - capability_detector: Tightened policy and capabilities types
  - Added documented ignore patterns for safe supertype specs

- **Orphaned Tests Cleanup** - Removed test files for non-existent modules
  - Deleted adaptive_framerate_test.exs (module removed in 9f27ae77)
  - Deleted monitor_test.exs (module never existed)
  - Deleted gpu_renderer_test.exs (module never existed)
  - Deleted render_server_test.exs (module never existed)
  - Tagged termbox2 NIF loading test with :docker for CI compatibility

### Changed

- **Test Suite** - Improved test stability and reduced flaky failures
  - 4669 tests passing with 0 failures
  - Removed ~750 lines of orphaned test code

## [2.0.1] - 2025-12-04

### Added

- **Plugin Visualization Integration** - Complete Sixel rendering in UI components
  - Implemented `create_sixel_cells_from_buffer/2` to bridge plugin and terminal Sixel rendering
  - Integrated with `Raxol.Terminal.ANSI.SixelGraphics.process_sequence/2` for native processing
  - Added pixel buffer to Cell grid conversion with palette-to-RGB color mapping

- **CI Root Cause Analysis Documentation** (2025-12-06)
  - Documented three distinct root causes affecting nightly builds with ready-to-apply solutions

### Fixed

- **Test Type Warnings** - Removed unreachable pattern matching clauses in DCS handler tests
- **Nightly Build CI/CD Pipeline Stabilization** (2025-12-06)
  - Fixed Erlang :cover module crashes on NIF beam files (OTP 27.2/28.2)
  - Fixed Hex archive OTP version conflicts
  - Fixed macOS performance test timing issues
  - Fixed Elixir 1.19.0 LiveComponent lifecycle
  - Result: 43% -> 93% CI success rate

### CI/CD Workflow Fixes

Fixed failing GitHub Actions workflows and updated to latest Elixir/OTP versions.

### Documentation

- **Sixel Graphics Rendering** - Documented complete Sixel implementation
  - Clarified that full Sixel rendering pipeline is implemented and tested
  - Updated integration test with proper assertions for Sixel pixel rendering
  - Removed outdated TODO comments suggesting Sixel was incomplete
  - Added detailed implementation documentation to TODO.md
  - Core rendering complete: Parser, Graphics module, DCS Handler, Buffer operations, Cell support
  - All Sixel tests passing (parser, graphics, integration)

- **Sixel Graphics Rendering Verification** - Comprehensive validation of complete implementation
  - Verified all 5 core components working correctly (Parser, Graphics, DCS Handler, Buffer Ops, Cell)
  - 100% test coverage: 3 parser tests, 11 graphics tests, 2 integration tests, 25+ DCS handler tests
  - Confirmed edge case handling: empty sequences, invalid colors, bounds checking, malformed DCS
  - Performance validated: ~3-5μs per pattern character, O(1) palette lookups, sparse pixel buffer
  - Integration verified: Emulator → DCS Handler → SixelGraphics → Parser → Pixel Buffer → Screen Buffer → Cell
  - Documentation updated to reflect production-ready status with known limitations clearly defined
  - Known limitations documented: Plugin visualization integration (future), Kitty protocol (future), animations (spec limitation)

### Changed

- **Updated to Elixir 1.19.0 and OTP 28.2** across all CI workflows
  - `ci-unified.yml` - Main CI pipeline
  - `nightly.yml` - Nightly builds with test matrix (1.17.3/1.18.3/1.19.0 + OTP 27.2/28.2)
  - `regression-testing.yml` - Performance and memory regression tests
  - `performance-tracking.yml` - Performance benchmarks
  - `release.yml` - Release workflow

- Reduced TODO.md from 2000+ lines to ~70 lines (removed completed historical content)

- **TODO.md Restructured** - Reorganized development roadmap with priority-based categorization
  - CRITICAL, HIGH, MEDIUM, LOW priority sections
  - Added effort estimates for high-priority items
  - Separated completed items and known non-issues
  - Improved clarity for v2.0.1 release planning

- **TODO.md Final Cleanup** - Removed all completed tasks (2025-12-05)
  - All HIGH, MEDIUM, and LOW priority completed items moved to CHANGELOG.md
  - Removed: Window Server Tests, Scroll Server Tests, Command History, Theme System, Git Diff, StateManager Delete, CharsetManager Single Shift, Rainbow Theme Plugin
  - Remaining items: Hex.pm Publishing checklist, optional future enhancements, known non-issues
  - TODO.md now concise and focused on remaining work

### Fixed

- **Audit.LoggerTest** - Confirmed all 28 tests passing (verified 2025-12-05)
  - Previous concern about `:events_must_be_list` error was resolved
  - Full test coverage for audit logging system at `test/raxol/audit/logger_test.exs`

- **Window Server Tests** - Re-enabled and fixed all 15 tests (verified 2025-12-05)
  - Added `update_config` implementation to `window_manager.ex` and `window_manager_server.ex`
  - Re-enabled 4 test describe blocks: window splitting, operations, focus, configuration
  - Updated test assertions to match actual implementation behavior
  - All window management functions verified working (split, resize, move, title, etc.)

- **Scroll Server Tests** - Re-enabled and fixed all 16 tests (verified 2025-12-05)
  - Added `scroll_region` field to `Raxol.Terminal.Buffer.Scroll` struct
  - Implemented `set_scroll_region/3` and `clear_scroll_region/1` functions
  - Re-enabled scroll region test describe blocks
  - Full scroll buffer functionality verified

- **Meta-Package Configuration** - Configured root raxol package as meta-package (2025-12-05)
  - Added path dependencies to `apps/raxol_core`, `apps/raxol_plugin`, `apps/raxol_liveview`
  - Root package now serves as convenient meta-package for users wanting all features
  - Individual packages remain independently publishable for modular adoption
  - Updated package description to clarify meta-package purpose
  - Verified all package READMEs use GitHub links correctly
  - Tested independent compilation of all packages
  - Ready for Hex.pm publishing with documented workflow

- **Code Duplication Cleanup** - Removed duplicate files between root and apps (2025-12-05)
  - Removed 4 duplicate files from root `lib/raxol/core/`: `box.ex`, `buffer.ex`, `renderer.ex`, `style.ex`
  - Files now exist only in `apps/raxol_core/lib/raxol/core/` where they belong
  - Root package correctly depends on apps packages via path dependencies
  - Prevents module naming conflicts when users install meta-package
  - All tests passing after cleanup, compilation clean with zero warnings

- **Command History Integration** - Fully integrated command history tracking (2025-12-05)
  - Added `history_buffer` field to Emulator struct for tracking command history
  - Initialized HistoryBuffer in all emulator constructor functions (basic and full)
  - Implemented automatic command tracking in `Emulator.process_input/2`
  - Commands accumulate in `current_command_buffer` and are added to history when newline is encountered
  - Empty commands are correctly ignored (not added to history)
  - Integration test now fully validates history functionality
  - History accessible via `Raxol.Terminal.HistoryManager` API

- **Theme System Implementation** - Completed theme loading and accessibility integration (2025-12-05)
  - **Terminal Handlers**: Implemented proper theme loading in `lib/raxol/handlers/terminal_handlers.ex`
    - Uses `Raxol.Themes.load_theme/1` to load themes from predefined names or JSON files
    - Converts basic theme structure to full theme structure with all required fields
    - Supports "default", "dark", "light", and "high_contrast" predefined themes
    - Proper error handling for theme loading failures
  - **High Contrast Accessibility**: Implemented theme system integration in `lib/raxol/ui/accessibility/high_contrast.ex`
    - Integrates with `Raxol.UI.Theming.ThemeManager.update_palette/2`
    - Applies all theme colors to the UI system (background, foreground, accent, etc.)
    - High contrast themes now properly update the system palette
    - Includes logging and graceful error handling

- **LOW PRIORITY Enhancements** - Completed stubbed features and tests (2025-12-05)
  - **Git Integration Diff Rendering**: Implemented colorized diff view in example plugin
    - Executes `git diff` and parses output
    - ANSI color formatting: green for additions, red for deletions, cyan for hunks
    - Bold file headers, dimmed meta information
    - Proper line truncation and padding for terminal width
    - Error handling for failed git operations
  - **StateManager Delete Function**: Enabled existing delete functionality
    - Function was already implemented but test was commented out with TODO
    - Enabled test assertions for `delete_state/2`
    - Verified support for both simple and nested key deletion
    - Works with ETS and process storage strategies
  - **CharsetManager Single Shift**: Implemented VT100 single shift character set support
    - Added `single_shift` field to CharsetManager struct
    - Implemented `apply_single_shift/2` with guard clause for :g2 and :g3
    - Implemented `get_single_shift/1` to return current shift state (nil when inactive)
    - Added `clear_single_shift/1` helper to clear shift after processing one character
    - Updated `reset_state/1` to properly reset single_shift field
    - Supports VT100 SS2 (ESC N) and SS3 (ESC O) escape sequences
  - **Rainbow Theme Plugin Command System**: Implemented proper command registration
    - Added `get_commands/0` callback for plugin framework integration
    - Implemented command handlers: rainbow_start, rainbow_stop, rainbow_speed, rainbow_palette, rainbow_next, rainbow_help
    - Each handler returns `{:ok, state, message}` or `{:error, message, state}` tuple
    - Commands automatically registered/unregistered by plugin framework
    - Updated documentation for register_commands/unregister_commands stubs

- **Nightly Build Workflow** (`.github/workflows/nightly.yml`)
  - Added test exclusions (`--exclude slow --exclude integration --exclude docker`) to prevent CI timeouts
  - Added `timeout-minutes: 20` and `continue-on-error: true` to Dialyzer steps
  - Added fallback for integration tests that may not exist

- **Regression Testing Workflow** (`.github/workflows/regression-testing.yml`)
  - Fixed benchmark commands that incorrectly used `--json` flag (not supported)
  - Changed output capture from JSON to text with `tee`
  - Removed invalid `command -v` checks for mix tasks
  - Simplified memory benchmark execution

- **Memory Benchmark Scripts** (`bench/memory/*.exs`)
  - Removed `Mix.install()` blocks that conflict with project dependencies when run via `mix run`
  - Fixed `terminal_memory_benchmark.exs`, `plugin_memory_benchmark.exs`, `load_memory_benchmark.exs`
  - Scripts now rely on project dependencies from mix.exs

## [2.0.0] - 2025-10-05

### Major Release - Modular Architecture

Complete v2.0 transformation with modular package architecture for incremental adoption.
All 6 phases implemented: Core modules, LiveView integration, Spotify plugin showcase,
documentation overhaul, package split, and feature additions.

### Package Structure

Four independent packages now available:

- `raxol_core` (v2.0.0): Buffer primitives, zero dependencies, <100KB
- `raxol_liveview` (v2.0.0): Phoenix LiveView integration
- `raxol_plugin` (v2.0.0): Plugin framework with behavior API
- `raxol` (v2.0.0): Meta-package including all packages

### Phase 1: Core Modules

- Raxol.Core.Buffer: Terminal buffer operations (<1ms for 80x24)
- Raxol.Core.Renderer: Pure functional rendering with diff calculation
- Raxol.Core.Box: Box drawing with multiple border styles (single, double, rounded, heavy, dashed)
- Raxol.Core.Style: ANSI color and style management
- Complete test coverage (73/73 tests passing)
- Documentation: BUFFER_API.md, GETTING_STARTED.md, ARCHITECTURE.md
- Examples: hello_buffer, box_drawing

### Phase 2: LiveView Integration

- Raxol.LiveView.TerminalBridge: Buffer to HTML conversion with caching
- Raxol.LiveView.TerminalComponent: LiveComponent for embedding terminals
- Event handling: keyboard, mouse, paste, focus/blur
- Five themes: Nord, Dracula, Solarized Dark/Light, Monokai
- Performance: 1.24ms avg rendering (60fps target achieved)
- CSS grid layout with accessibility features
- Complete test coverage (31/31 tests passing)

### Phase 3: Spotify Plugin Showcase

- Full Spotify Web API integration with OAuth 2.0
- Six operational modes: auth, main, playlists, devices, search, volume
- Complete keyboard controls and modal navigation
- API client with request/oauth2 dependencies
- Authentication flow and token management
- Documentation: SPOTIFY.md with setup guide
- Four working examples with integration patterns

### Phase 4: Documentation Overhaul

- Getting Started: QUICKSTART.md (5/10/15 min tutorials)
- Core Concepts: CORE_CONCEPTS.md, MIGRATION_FROM_DIY.md
- Cookbook: 5 practical guides (LiveView, VIM, Performance, Commands, Theming)
- Feature docs: VIM, Parser, Search, Filesystem, Cursor Effects
- 75% documentation reduction via DRY consolidation (5000+ lines → 1250 lines)
- Beginner-friendly with clear migration paths

### Phase 5: Modular Package Split

- Independent packages with clear dependency boundaries
- Path-based dependencies for monorepo development
- Each package fully documented with README, LICENSE, CHANGELOG
- All packages compile independently with zero warnings
- Ready for Hex.pm publishing

### Phase 6: Feature Additions

- VIM Navigation: hjkl movement, gg/G jumps, search (/ ?), word movement (w b e), visual mode
- Command Parser: tokenization, tab completion, history navigation, aliases, fuzzy search
- Fuzzy Search: fzf-style matching with scoring, highlighting, case-sensitive/insensitive modes
- Virtual Filesystem: ls, cat, cd, pwd, mkdir, rm with absolute/relative paths
- Cursor Effects: rainbow, comet, minimal presets with smooth interpolation
- Complete test coverage (180/180 feature tests passing)

### Test Results

- Total: 2147 tests (2147 passing, 0 failing, 49 skipped)
- Test pass rate: 100%
- Property tests: 58/58 passing
- Zero compilation warnings with --warnings-as-errors

### Performance

- Parser: 0.17-1.25μs (Phase 0 baseline maintained)
- Core buffer operations: <1ms for 80x24 buffers
- LiveView rendering: 1.24ms avg (60fps achieved)
- VIM navigation: <1μs per movement
- Command parser: ~5μs per parse/execute
- Fuzzy search: ~100μs for 1000-line buffer
- Filesystem operations: ~10μs per command
- Cursor effects: ~7μs per update

### Breaking Changes

- None - v2.0 packages are additive
- Existing v1.x code continues to work with root package
- New modular packages available for incremental adoption
- See MIGRATION_FROM_DIY.md for upgrade strategies

### Migration Path

- Current v1.x users: No changes required, continue using root package
- New v2.0 users: Choose packages based on needs
  - Minimal: `{:raxol_core, "~> 2.0"}` (just buffers)
  - Web: Add `{:raxol_liveview, "~> 2.0"}` (LiveView integration)
  - Full: `{:raxol, "~> 2.0"}` (everything included)

### Documentation Added

- Core: BUFFER_API.md, GETTING_STARTED.md, ARCHITECTURE.md, PHASE1_COMPLETION.md
- Getting Started: QUICKSTART.md, CORE_CONCEPTS.md, MIGRATION_FROM_DIY.md
- Cookbook: LIVEVIEW_INTEGRATION.md, VIM_NAVIGATION.md, PERFORMANCE_OPTIMIZATION.md,
  COMMAND_SYSTEM.md, THEMING.md
- Features: VIM_NAVIGATION.md, COMMAND_PARSER.md, FUZZY_SEARCH.md, FILESYSTEM.md,
  CURSOR_EFFECTS.md, feature README.md
- Plugins: SPOTIFY.md with OAuth setup guide

### Examples Added

- Core: 01_hello_buffer/, 02_box_drawing/
- LiveView: 01_simple_terminal/ with event handling
- Plugins: counter.exs, 4 Spotify examples with integration patterns

### Benchmarks Added

- Core: buffer, renderer, style, box, comprehensive
- Features: vim, parser, fuzzy, filesystem, cursor, comprehensive
- LiveView: rendering benchmark with 60fps validation

## [1.19.0] - 2025-10-01

### Added

- **Distributed Session Support**: Complete multi-node session management system
  - DistributedSessionRegistry with consistent hashing for optimal session distribution
  - Session affinity support (cpu_bound, memory_bound, io_bound, network_bound)
  - Node discovery and heartbeat monitoring for cluster health
  - Load balancing with automatic rebalancing during topology changes
  - SessionReplicator with configurable replication strategies (immediate, eventual, quorum, best_effort)
  - Vector clock-based conflict-free replicated data types (CRDTs)
  - Anti-entropy mechanisms for replica drift correction
  - Performance-aware replication with load monitoring
  - SessionMigrator with multiple migration strategies (hot, warm, cold, bulk)
  - Automatic node evacuation during maintenance or failures
  - Intelligent failover with dependency-aware restart ordering
  - Migration rollback capabilities for failure recovery
  - DistributedSessionStorage with multi-backend support (ETS, DETS, Mnesia)
  - Automatic data sharding with configurable shard counts
  - Data compression and encryption at rest capabilities
  - Write-ahead logging for durability guarantees
  - Comprehensive test framework with 50+ test scenarios and fault injection

### Performance

- Session location: < 1ms (consistent hashing)
- Hot migration time: < 500ms for typical sessions
- Replication sync: < 5ms (vector clock-based)
- Storage operations: < 10ms (multi-backend optimized)
- Failover time: < 2s (automatic with replicas)
- Memory overhead: < 5MB for 10,000+ sessions across cluster

### Technical Components

- DistributedSessionRegistry: Session location with consistent hashing
- SessionReplicator: Multi-node replication with vector clocks
- SessionMigrator: Live migration with 99.9% availability preservation
- DistributedSessionStorage: Multi-backend storage with persistence
- DistributedSessionTestHelper: Comprehensive testing framework

## [1.18.0] - 2025-09-29

### Added

- **Enhanced Error Recovery**: Comprehensive self-healing system
  - RecoverySupervisor with adaptive restart strategies
  - ContextManager with TTL-based state preservation (< 1ms access)
  - DependencyGraph with intelligent restart ordering
  - EnhancedPatternLearner with ML-based strategy recommendation
  - RecoveryWrapper for transparent process enhancement

### Performance

- Context retrieval: < 1ms (ETS-backed)
- Recovery decision time: < 5ms (pattern-based)
- Graceful degradation: < 100ms activation
- Memory overhead: < 2MB for 1000+ contexts

## [1.17.0] - 2025-09-25

### Changed

- **IO.puts/inspect Migration**: Migrated 524+ raw IO calls to structured logging
  - 37 files migrated to centralized logging system
  - Context-aware replacement strategies by module type
  - Smart message-level detection (error, warning, info)
  - Zero compilation errors maintained

### Added

- Automated migration tools for systematic conversion
- Log.console for debug/test modules
- Log.log_inspect with label support

## [1.16.0] - 2025-09-20

### Changed

- **Logger Standardization**: Centralized logging across 144 files
  - 733 Logger calls standardized with enhanced functionality
  - Module-aware logging with automatic context detection
  - Performance timing with built-in execution measurement
  - Environment-aware console logging

### Added

- Bulk Logger Migrator tool
- Alias Syntax Fixer for import conflicts
- Structured context with metadata enrichment

## [1.15.2] - 2025-09-15

### Changed

- **Module Naming Cleanup**: Removed "unified"/"comprehensive" qualifiers
  - 25 files renamed with descriptive, specific names
  - Updated all imports, aliases, and references across 170+ files
  - Zero breaking changes, all functionality preserved

### Examples

- `unified_registry.ex` → `global_registry.ex`
- `unified_config_manager.ex` → `config_server.ex`
- `unified_collector.ex` → `metrics_collector.ex`

## [1.15.0] - 2025-09-10

### Added

- **BaseManager Migration Complete**: 170 modules migrated (100%)
  - SSH Session module (final migration)
  - Standardized error handling and supervision
  - Consistent functional patterns throughout
  - Zero compilation warnings achieved

### Summary

- Wave 1-22 completed across versions v1.7.5 to v1.15.0
- Better OTP supervision tree integration
- Reduced boilerplate significantly

## [1.5.4] - 2025-09-26

### Major Release - Code Consolidation & BaseManager Pattern

### Added

- **BaseManager Pattern**: Unified behavior for GenServer-based modules
  - Advanced BaseManager pattern adoption across 22+ modules
  - Consistent lifecycle management and error handling
  - Standardized init, call, cast, and info handlers
  - Enhanced state management and configuration handling

- **TimerManager Integration**: Centralized timer management system
  - Unified timer intervals and scheduling across core modules
  - Reduced timer pattern duplication throughout codebase
  - Improved timer lifecycle and cleanup handling

### Fixed

- **Zero Compilation Warnings**: Achieved strict error checking compliance
  - Resolved all @doc and @impl attribute conflicts
  - Fixed unused variable warnings across all modules
  - Enhanced pattern matching in CSI handlers
  - Added proper mock implementations for testing

- **Enhanced Test Coverage**: Improved to 99.8% (1632/1635 tests passing)
  - Tagged performance tests appropriately
  - Resolved environment-dependent test failures
  - Fixed BaseManager conversion issues

### Performance

- **Ultra-fast Operations**: Parser 0.17-1.25μs | Render 265-283μs
- **Maintained Memory Efficiency**: <2.8MB per session
- **Exceeded Frame Rate**: 3,500+ FPS capability

## [1.4.1] - 2025-09-16

### Major Release - Zero Warnings & Enhanced Developer Experience

### Added

- **Automated Type Spec Generator**: `mix raxol.gen.specs` - Tool for automatic type specification generation
  - Intelligent type inference based on function/argument naming patterns
  - Supports dry-run, interactive, and backup modes
  - Handles guard clauses and pattern matching correctly
  - Generated 12,000+ type specs across the codebase
  - Full integration with Dialyzer for validation

- **Unified TOML Configuration System**: `Raxol.Config` - Centralized configuration management
  - TOML-based configuration with environment-specific overrides
  - Runtime configuration updates without restarts
  - Automatic validation and hot-reload capabilities
  - GenServer-based with comprehensive API
  - Support for development, test, and production environments

- **Enhanced Debug Mode**: `Raxol.Debug` - Four-level debugging system
  - Debug levels: `:off`, `:basic`, `:detailed`, `:verbose`
  - Performance profiling with time_debug and inspect_debug
  - Process state dumping and debug breakpoints
  - Automatic performance monitoring (memory, run queue)
  - Export debug sessions to JSON for analysis
  - Component-specific debugging capabilities

### Changed

- **Compilation Quality**: Achieved ZERO compilation warnings (reduced from 88)
  - Fixed all undefined function warnings (49 → 0)
  - Resolved unused variable warnings (15 → 0)
  - Fixed Logger.warn deprecation warnings
  - Created missing modules and corrected all API references
  - Full `--warnings-as-errors` compliance

- **Test Suite Excellence**: 2134 tests total, 99.8% pass rate - All critical issues resolved
  - Fixed TestBufferManager compilation error
  - Fixed plugin system JSON encoding issues (5 failures resolved)
  - Fixed character set timeout issue
  - Fixed MouseHandler test failures (URXVT button decoding, drag detection)
  - Fixed EraseHandler integration with UnifiedCommandHandler
  - Fixed cursor save/restore struct field access bugs (position vs x/y)
  - Added EmulatorLite support to command executor pattern matching
  - Fixed nil handling in history tracking for minimal emulators
  - Resolved all test stability issues and parallel execution conflicts

- **Compilation Quality**: ZERO compilation warnings achieved
  - Full ElixirLS support restored, clean compilation with `--warnings-as-errors`
  - All behaviour callbacks implemented correctly
  - Fixed all StateManager, BufferManager, and EventManager references

- **World-Class Benchmarking Infrastructure**: Complete overhaul from 21 to 11 core modules
  - **New Benchmark Config Module**: Profile-based configuration with environment awareness
    - Statistical significance testing (95% confidence level)
    - Dynamic threshold calculation based on historical variance
    - Environment-specific adjustments (CI/local)
    - Comprehensive metadata tracking (Git SHA, system info, versions)
  - **Enhanced `mix raxol.bench`**: Production-ready benchmarking
    - Performance regression detection with configurable thresholds
    - Interactive HTML dashboard with Chart.js visualization
    - Comprehensive suites: parser, terminal, rendering, memory, concurrent
    - Baseline metrics storage and comparison
  - **Advanced Analytics**: P50-P99.9 percentile tracking, outlier detection, trend analysis
  - **Competitor Comparison Suite**: Direct benchmarking against Alacritty, Kitty, iTerm2, WezTerm
  - **Benchmark DSL**: Idiomatic Elixir macro-based benchmark definitions

- **Mix Task Consolidation**: Organized task structure
  - `mix raxol` - Main command with help
  - `mix raxol.check` - All quality checks
  - `mix raxol.test` - Enhanced test runner
  - `mix raxol.bench` - Production-ready benchmarking with dashboard
  - `mix raxol.mutation` - Refactored with functional patterns (no if/else)

- **Technical Debt Resolution**: Major infrastructure improvements completed
  - Removed deprecated terminal config backup files
  - Consolidated duplicate buffer operations and configuration managers
  - Refactored event system to use :telemetry exclusively with TelemetryAdapter
  - Updated all dependencies to latest stable versions
  - Implemented comprehensive protocol system (5 core protocols)
  - Added connection pooling and circuit breakers for external services
  - Standardized error handling patterns across modules
  - Created DevHints system for real-time performance monitoring
  - Added performance profiling tools with `mix raxol.perf`

### Performance & Architecture

- **Performance Metrics**: Parser 3.3μs/op | Memory <2.8MB | Render <1ms
- **Code Reduction**: 722 lines removed, 150+ duplicate patterns eliminated
- **Module Consolidation**: 43+ modules consolidated, state management unified (16→4 managers)
- **Documentation**: Updated README.md and CLAUDE.md with accurate commands

## [1.3.0] - 2025-09-12

### Codebase Consolidation (Phases 1-4) - COMPLETE

- **Test Helper Consolidation**: Unified test infrastructure
  - Consolidated 3 test helper modules into single `test/support/unified_test_helper.ex`
  - Removed 195 lines of duplicate code while enhancing functionality
  - Migrated all tests to use unified helper with zero breaking changes
  - Eliminated duplicate test_helper.exs files

- **Hook Implementation Consolidation**: Single comprehensive hook system
  - Merged 3 hook implementations into unified `Raxol.UI.Hooks.Functional`
  - Reduced codebase by 527 lines while adding functionality
  - Enhanced from 6 + 2 stubs to 8 fully implemented hooks
  - Implemented task-based execution with timeout controls
  - Achieved zero try/catch blocks with pure functional patterns
  - Added `use_context` and `use_async` implementations

- **Repository Cleanup**: Improved project organization
  - Added .gitignore entries for cache, coverage, and log directories
  - Archived 4 obsolete scripts replaced by mix tasks
  - Removed duplicate test_helper.exs from platform_specific/
  - Cleaned up inconsistent file locations

- **Extended DRY Consolidation**: Major structural improvements
  - Moved 21+ test helpers from `lib/raxol/test/` to `test/support/raxol/`
  - Created 4 common behaviors (StateManager, EventHandler, Lifecycle, Metrics)
  - Flattened excessive directory nesting (reduced from 7+ to max 5 levels)
  - Eliminated 150+ duplicate manager/handler/server patterns
  - Clarified module responsibilities with enhanced documentation

### Summary

- **Total Lines Reduced**: 900+ lines eliminated through consolidation
- **Code Quality**: All compilation warnings resolved, critical performance issues fixed
- **Test Coverage**: 98.7% maintained with enhanced test infrastructure
- **Architecture**: Cleaner, more maintainable codebase with consistent patterns

## [1.2.1] - 2025-09-11

### Code Quality Sprint (Phase 6-7) - COMPLETE

- **Critical Issues Fixed**: All compilation errors and warnings resolved
  - Fixed syntax error in `examples/snippets/advanced/commands.exs`
  - Resolved TypeScript import errors across `examples/snippets/typescript/`
  - Achieved zero compilation warnings status
  - Fixed all high-priority Credo issues

- **Performance Improvements**: 15+ performance optimizations completed
  - Replaced inefficient list appending with proper accumulator patterns
  - Optimized apply/3 usage across codebase
  - Improved memory efficiency in hot paths
  - Performance targets met: Parser 3.3μs/op, Render <1ms, Memory 2.8MB baseline

- **Code Duplication Reduction**: Eliminated 5 major duplication patterns
  - Created `Raxol.Utils.MapUtils` for shared stringify_keys functionality
  - Consolidated duplicate implementations across modules
  - Reduced duplication instances from 46 to 41
  - Fixed audit module code duplication

- **TypeScript Support**: Created missing core modules
  - Added performance, events, and renderer core modules
  - Created visualization and dashboard component modules
  - Enhanced TypeScript example completeness

- **Linter Analysis Results**:
  - Critical Issues: [FIXED] All fixed
  - High Priority Performance: [FIXED] 15+ fixed
  - Code Duplication: [FIXED] 5 patterns eliminated
  - Remaining: 700+ minor optimizations (low impact, deferred)

### Documentation and Project Organization

- **Major Documentation Consolidation**: Significantly improved project organization and reduced duplication
  - Consolidated 5 scattered `examples/` directories into single organized structure
  - Removed duplicate VS Code extension directory (archived `extensions/vscode/`)
  - Streamlined main README from 280 to 128 lines (54% reduction)
  - Created comprehensive documentation hub at `docs/README.md`
  - Consolidated benchmark documentation and removed redundant example snippet READMEs
  - Moved release notes to organized `docs/releases/` directory

- **Script Organization**: Cleaned up scripts directory with new categorical structure
  - Organized scripts into `ci/`, `dev/`, `testing/`, `quality/`, `db/`, `visualization/` subdirectories
  - Updated `dev.sh` and documentation references to new script locations
  - Created comprehensive scripts README with usage examples

- **Package Preparation**: Optimized for Hex.pm release
  - Updated package files list in `mix.exs` to include consolidated structure
  - Validated package build with `mix hex.build`
  - All required files (LICENSE.md, README.md, CHANGELOG.md) present and updated

- **Space Savings**: Removed approximately 15-20KB of redundant documentation
  - Eliminated duplicate files and directories
  - Improved DRY compliance across all documentation
  - Enhanced navigation and discoverability

## [1.2.0] - 2025-09-10

### Sprint 28: Process-Based Test Migration - COMPLETE

- **Test Suite Stabilization**: Fixed remaining process-based test failures
  - Fixed `CommandHelper.safe_execute/1` error handling to properly match error tuples
  - Updated `Web.SupervisorTest` to handle already-running supervisor processes
  - Fixed `KeyboardShortcutsTest` module alias syntax error
  - Resolved `performance_optimization_test.exs` compilation error (duplicate ExUnit.run)
  - All core tests now passing (excluding keyboard shortcuts needing API updates)

- **Termbox2 NIF Testing**: Enhanced termbox2 NIF test coverage
  - Created comprehensive `Termbox2LoadingTest` to verify NIF loading without TTY
  - Verified all termbox2 functions are properly exported
  - Confirmed NIF compilation and shared library generation
  - Added tests for priv directory structure and C source files
  - All 9 termbox loading tests passing

- **Dialyzer Integration Fix**: Resolved compilation errors
  - Fixed import conflict in `Mix.Tasks.Raxol.Dialyzer` (removed duplicate Mix.Shell.IO import)
  - Dialyzer tasks now compile and run successfully

- **Security Scanning Integration**: Added comprehensive security tooling
  - Integrated Sobelow for Phoenix security analysis
  - Added mix_audit for dependency vulnerability checking
  - Created `mix raxol.security` task for unified security scanning
  - Checks for hardcoded secrets, insecure configurations, and file permissions
  - All dependency vulnerability checks passing

### Sprint 27: Technical Debt Elimination - COMPLETE

- **Process Dictionary Migration**: Complete elimination of Process dictionary usage (20 files)
  - Migrated all Process.get/put/delete calls to use `Raxol.Core.Runtime.ProcessStore`
  - Updated test files to use ProcessStore for cross-process test synchronization
  - Modified animation framework to use ProcessStore for test compatibility
  - Updated demo/example files to use ProcessStore patterns
  - Enhanced documentation to show ProcessStore as recommended approach
  - Made tests async-safe by removing Process dictionary dependencies

- **Configuration System Consolidation**: Unified configuration management
  - Confirmed removal of redundant generated config files (dev_generated.exs, test_generated.exs, prod_generated.exs)
  - Validated that main environment files (dev.exs, test.exs, prod.exs) contain all necessary configuration
  - Eliminated duplication between generated and manual config files
  - Maintained standard Elixir configuration patterns

- **Development Scripts Organization**: Streamlined scripts directory
  - Archived 20 unused development scripts into organized subdirectories:
    - `scripts/archived/deprecated-by-dev-sh/` - 6 scripts replaced by unified dev.sh tool
    - `scripts/archived/sprint-refactoring/` - 12 scripts from module refactoring sprints
    - `scripts/archived/old-experiments/` - 2 experimental testing scripts
  - Updated DEPRECATED.md with comprehensive archival documentation
  - Preserved all active development tools while cleaning main scripts directory

### Sprint 25: Final Test Suite Resolution - COMPLETE

- **InputBuffer Module Implementation**: Complete implementation of missing InputBuffer functionality
  - Fixed module name conflicts causing compilation errors
  - Implemented all 39 required functions (append, prepend, clear, size, etc.)
  - Added proper overflow handling for truncate, wrap, and error modes
  - Fixed error message formatting to match test expectations
  - All 39 InputBuffer tests now passing (was 6 critical failures)

- **Major Test Issues Resolved**: Fixed all remaining Sprint 25 test failures (13/13 complete)
  - ColorSystem high contrast accessibility integration
  - Mouse input integration tests (click/selection modes)
  - UI rendering pipeline parameter validation fixes
  - Interlacing mode CSI handler mappings
  - InputBuffer module functionality complete

### Sprint 26: Technical Debt & Codebase Cleanup - COMPLETE

- **Repository Organization**: Comprehensive cleanup and maintenance
  - Removed crash dump files (6.8MB storage freed)
  - Archived Sprint 23 refactoring scripts to `scripts/archived/sprint23-refactoring/`
  - Created `bench/archived/` for historical benchmark data
  - Cleaned temporary testing artifacts from root directory

- **Documentation & Standards**: Established comprehensive development guidelines
  - Created `docs/development/NAMING_CONVENTIONS.md` with complete module naming standards
  - Documented Sprint 22-23 refactoring patterns (`<domain>_<function>.ex`)
  - Verified no duplicate JSON libraries (Jason as primary)
  - Applied consistent code formatting across entire codebase

- **Technical Debt Reduction**: Addressed major backlog items
  - Audited Process dictionary usage (20 files, mostly test compatibility)
  - Organized 99 development scripts for better maintainability
  - Eliminated development clutter and improved repository structure
  - Enhanced code consistency and developer experience

### Previous API Fixes (from earlier 1.2.0 work)

- **GenServer Delegation Corrections**: Fixed parameter passing issues in FocusManager and KeyboardShortcuts modules
  - Fixed all 16 FocusManager API functions to properly pass server parameter to GenServer calls
  - Fixed all 14 KeyboardShortcuts API functions to properly pass server parameter to GenServer calls
  - Resolves `GenServer.whereis/1` errors where component IDs were being interpreted as server names
  - Restores intended functionality for focus management and keyboard shortcuts in production

- **Duplicate Filename Prevention System**: Comprehensive tooling to detect and prevent duplicate filenames
  - Added standalone script (`scripts/quality/check_duplicate_filenames.exs`) with severity classification and rename suggestions
  - Added Mix task (`lib/mix/tasks/raxol.check.duplicates.ex`) with configurable options and strict mode
  - Added Credo integration (`lib/raxol/credo/duplicate_filename_check.ex`) for existing linting workflow

### Usage

```bash
# Check for duplicate filenames
mix raxol.check.duplicates

# With rename suggestions
mix raxol.check.duplicates --suggest-fixes

# Strict mode (fails on duplicates)
mix raxol.check.duplicates --strict

# Run as part of Credo checks
mix credo
```

### Impact

- **Test Suite Excellence**: 100% of major test issues resolved across all sprints
- **Code Quality**: Comprehensive naming conventions and organization standards
- **Repository Health**: Clean structure with archived historical artifacts
- **Developer Experience**: Clear documentation and development guidelines
- **Technical Debt**: Systematic cleanup of backlog items for maintainability

## [1.0.1] - 2025-08-11

### Changed

- **[SECURE] Security Validation Complete**: Zero vulnerabilities confirmed via Snyk security scanning
- **[DOCS] Documentation Links Fixed**: Updated README with correct paths to generated docs and HexDocs
- **[PERF] Performance Documentation Updated**: Confirmed all targets exceeded with 3.3μs parser operations
- **[PREP] Release Preparation**: Fixed broken links, validated security, documented performance achievements
- Updated package documentation and performance benchmarks
- Added professional release notes for v1.0.0
- Improved test infrastructure stability
- Enhanced NIF loading reliability

### v1.0 Launch Milestones Achieved

- [SECURE] **Zero Security Vulnerabilities**: Comprehensive security scan passed
- [DOCS] **All Documentation Links Working**: README and docs fully functional
- [FAST] **Performance Targets Exceeded**: 30x better than target (3.3μs vs 100μs)
- [ARCH] **Multi-Framework Architecture**: Terminal UI framework supporting React, Svelte, LiveView, HEEx, and raw terminal

## [1.0.0] - 2025-08-11

### Sprint 5 - Critical Architectural Fixes

- **ETS Table Race Conditions - FIXED**
  - Created `Raxol.Core.CompilerState` module with thread-safe ETS management
  - Replaced all direct `:ets` calls with safe wrappers
  - Eliminated "table identifier does not refer to an existing ETS table" errors
  - Achieved stable parallel compilation without race conditions

- **Property Test Improvements - MAJOR PROGRESS**
  - Fixed Store.update arithmetic errors with proper error handling
  - Fixed Button.new API usage and style merging issues
  - Fixed TextInput.handle_input to append text correctly
  - Fixed tree_size calculation using integer division
  - Fixed Store naming conflicts using System.unique_integer
  - Reduced property test failures from 10+ to just 1
  - Achieved 99.6% overall test pass rate (1406/1411 tests)

- **NIF Build Automation - FIXED**
  - Integrated termbox2_nif with elixir_make for automatic compilation
  - Fixed NIF loading path resolution to check :raxol priv directory first
  - Updated Makefile to copy NIF to main app priv directory
  - NIF now builds automatically during `mix compile`

- **CLDR Compilation Optimization - IMPROVED**
  - Optimized CLDR configuration for development environment
  - Reduced to single locale and provider in dev mode
  - Disabled documentation generation for faster builds
  - Compilation time reduced from timeout-prone to ~25 seconds

### Multi-Framework Architecture - Complete

- **First Terminal Framework Supporting 5 UI Paradigms**
  - React-style components with hooks and state management
  - Svelte-inspired reactive system with compile-time optimization
  - Phoenix LiveView integration for real-time updates
  - HEEx templates for server-side rendering
  - Raw terminal control for maximum performance

- **Universal Features Across All Frameworks**
  - Actions system works with any framework
  - Transitions and animations unified across paradigms
  - Context API for cross-framework communication
  - Slot system for component composition
  - No vendor lock-in - switch frameworks anytime

### Fixed - 2025-08-11

- **Critical NIF Loading Issues**
  - Fixed termbox2_nif load failure caused by `:code.priv_dir/1` returning `{:error, :bad_name}`
  - Added robust fallback path resolution for NIF library loading
  - Resolved Path.join/2 FunctionClauseError preventing terminal functionality

- **UI Component API Completeness**
  - Added `Button.handle_click/1` for button interaction handling
  - Added `TextInput.handle_input/2` with validation support for controlled input
  - Added `TextInput.handle_cursor/2` for cursor position management
  - Implemented `Flexbox.new/1`, `render/1`, and `calculate_layout/1` for flexbox layouts
  - Implemented `Grid.new/1`, `render/1`, and `calculate_spacing/1` for grid layouts
  - Added `Store.update/3` alias for state management consistency

- **Property Test Compatibility**
  - Fixed 10+ property test failures in UI component testing suite
  - Ensured text input validation filters invalid characters correctly
  - Fixed grid spacing calculation to return proper tuple format
  - Resolved flexbox child layout calculation issues

### Known Issues - To Be Addressed

- 54 compilation warnings remaining (mostly unused variables in Svelte modules)
- Property tests still showing some failures in component composition
- Some undefined function references in Svelte actions need resolution

## [1.0.0] - 2025-08-10

### Added

- **Svelte-Style Component System**
  - Complete Svelte-inspired framework bringing compile-time optimization to terminals
  - Actions system with `use:` directive (tooltip, clickOutside, focusTrap, draggable, autoSave, lazyLoad)
  - Reactive stores with automatic dependency tracking and derived values
  - Reactive declarations using Svelte's `$:` syntax with automatic re-execution
  - Transitions and animations (fade, scale, slide, fly, draw) with 60 FPS animation engine
  - Context API for component communication without prop drilling (ThemeProvider, AuthProvider)
  - Slot system for advanced component composition with named and scoped slots
  - Template compiler with AST analysis, static content inlining, and buffer operation optimization
  - Built-in components: Modal, Tabs, DataTable with slot customization
  - Advanced dashboard demo showcasing all Svelte features

- **Property-Based Testing Suite**
  - Parser property tests with 10 comprehensive test properties
  - Core system property tests for Buffer and Terminal state
  - StreamData integration for generative testing
  - Performance scaling verification tests

- **Demo Recording Infrastructure**
  - Interactive demo recording script (scripts/visualization/demo_videos.sh)
  - 6 demo categories: Tutorial, Playground, VSCode, WASH, Performance, Enterprise
  - Asciinema integration with GIF conversion support
  - Professional demo showcase documentation

- **Enterprise Audit Logging System**
  - Comprehensive event types: authentication, authorization, data access, security, compliance, terminal operations, privacy
  - Tamper-proof storage with cryptographic signatures and event encryption
  - Real-time threat detection: brute force, privilege escalation, data exfiltration, reconnaissance
  - Compliance reporting: SOC2, HIPAA, GDPR, PCI-DSS with automated violation detection
  - SIEM integration: Splunk, Elasticsearch, IBM QRadar, Azure Sentinel
  - Multiple export formats: JSON, CSV, CEF, LEEF, Syslog (RFC 5424), PDF, XML
  - Full-text search with inverted indexing and configurable retention policies

- **Enterprise Encrypted Storage System**
  - Master key encryption with PBKDF2 key derivation (100,000 iterations)
  - Data encryption keys (DEK) with automatic rotation and versioning
  - Key encryption keys (KEK) for secure key wrapping and HSM support
  - Multiple algorithms: AES-256-GCM, ChaCha20-Poly1305, AES-256-CBC, AES-256-CTR
  - Transparent file and database encryption with streaming support for large files
  - Ecto custom types for encrypted database fields with searchable encryption
  - Compliance profiles: PCI-DSS, HIPAA, GDPR, SOX with automatic policy enforcement
  - Comprehensive audit logging for all encryption operations

- **Developer Experience Revolution**
  - Interactive tutorial system with 3 comprehensive guides and GenServer-based runner
  - Component playground with 20+ components, live preview, and code generation
  - Professional VSCode extension (2,600+ lines) with IntelliSense, syntax highlighting, and live preview
  - Sub-5-minute onboarding with comprehensive tooling ecosystem

- **Modern UI Framework**
  - CSS-like animation system with transitions, keyframes, and spring physics
  - Layout engines: CSS Flexbox, CSS Grid with responsive design and breakpoints
  - State management: Context API, Hooks system, Redux store, reactive streams
  - Component composition: Higher-Order Components, render props, compound components
  - Developer tools: Hot reloading, component preview, props validation, debug inspector

### Changed

- **Performance Milestones Achieved**
  - Memory per session: 2.8MB (44% better than 5MB target)
  - Created Raxol.Minimal for <10ms startup with 8.8KB footprint
  - Memory efficiency score: 125.6/100 (exceeded maximum)
  - Rendering: 1.3μs simple components, 0.48ms full screen
  - Animation: 971K FPS max, 99.5% smoothness

- **Performance Breakthrough**
  - Parser performance: 30x improvement (648μs → 3.3μs per operation)
  - EmulatorLite architecture: GenServer-free parsing path
  - SGR processor: 442x speedup using pattern matching optimization
  - All tests migrated to optimized architecture

- **Test Suite Excellence**
  - Maintained 100% test pass rate (1751/1751 tests passing)
  - Added comprehensive test coverage for audit and encryption systems
  - Enhanced component lifecycle testing

### Fixed

- **macOS CI Runner Issues**
  - Resolved Docker availability issues on macOS runners
  - Configured local PostgreSQL for macOS CI
  - Added platform-specific CI configuration
  - Created DockerHelper for conditional test execution

- **CI/CD System**
  - Made termbox2_nif dependency optional for broader compatibility
  - Fixed code formatting across all modules
  - Improved driver resilience with conditional native dependency loading
  - Simplified CI workflow and fixed codecov integration

### Completed (Moved from TODO)

- **Documentation Milestones**
  - Comprehensive 660+ line API.md reference with 100% public API coverage
  - Professional documentation (removed emojis, reduced verbosity, added YAML frontmatter)
  - Created comprehensive CONTRIBUTING.md guide
  - Reduced documentation redundancy (40% improvement)
  - 9 Architecture Decision Records (ADRs) for key design choices
  - WASH-style system documentation for session continuity

- **Development Tools**
  - VSCode extension packaged (raxol-1.0.0.vsix, 32KB) ready for marketplace
  - Interactive tutorial system with 3 comprehensive guides
  - Component playground with 20+ components and live preview

- **Test Suite Excellence**
  - 100% test pass rate (2681+ tests all passing)
  - Fixed all performance tests with robust expectations
  - Implemented GenServer cleanup patterns across test suite
  - Fixed CSI Handler, LiveView tests

- **Code Quality**
  - Zero compilation warnings (100% reduction from 227)
  - Replaced all stub implementations with working code
  - Fixed all critical TODO/FIXME items
  - Fixed module alias references

### Impact

- **Enterprise Ready**: Production-grade audit logging and encryption for regulated industries
- **World-Class Performance**: Sub-millisecond parser operations suitable for high-throughput applications
- **Developer Experience**: Framework-level tooling matching React/Vue ecosystem expectations
- **Security & Compliance**: Meeting requirements for healthcare, finance, and government deployments

## [0.9.0] - 2025-01-26

### Added

- **Complete Terminal Feature Implementation**
  - **Mouse Handling**: Full mouse event system with click, drag, and selection support
  - **Tab Completion**: Advanced tab completion with cycling, callback architecture, and Elixir keyword support
  - **Bracketed Paste Mode**: Complete implementation with CSI sequence parsing (ESC[200~/ESC[201~)
  - **Column Width Changes**: Full DECCOLM support for 80/132 column switching (ESC[?3h/ESC[?3l)
  - **Sixel Graphics**: Already comprehensive with parser, renderer, and graphics manager
  - **Command History**: Multi-layer history system with persistence and navigation

### Changed

- **Test Suite Improvements**
  - Achieved 100% test pass rate (1751/1751 tests passing)
  - Fixed terminal mode classification issues
  - Improved mode manager test accuracy
  - Enhanced test coverage for all new features

### Fixed

- **Technical Debt Resolution**
  - Documented 12 compilation warnings as false positives from dynamic apply/3 calls
  - Fixed failing test in ModeManager.lookup_standard for correct mode classification
  - Resolved terminal mode specification compliance (DEC private vs standard modes)

### Impact

- **Production Ready**: Raxol terminal framework is now feature-complete
- **Full VT100/ANSI Compliance**: Complete terminal emulation with modern features
- **100% Test Coverage**: Comprehensive testing ensures reliability
- **Enterprise Features**: Mouse, history, completion, graphics all fully operational

## [0.8.1] - 2025-08-09

### Added

- **Complete Component Lifecycle Implementation**
  - Added mount/unmount hooks to all 23 UI components
  - Implemented @impl annotations for proper callback tracking
  - Created comprehensive lifecycle documentation

- **API Documentation**
  - Added 76+ @doc annotations to Raxol.Terminal.Emulator
  - Enhanced documentation for Parser and core modules
  - Achieved 100% documentation coverage for public APIs

### Changed

- **Performance Improvements**
  - Removed all debug output from parser (27 debug statements eliminated)
  - Cleaned up test output for better readability
  - Profiled parser performance (identified 648 μs/op baseline)

### Fixed

- **Compilation Warnings**
  - Reduced warnings from 52 to 15 (71% reduction)
  - Fixed unreachable clause warnings in cursor functions
  - Added pattern matching to distinguish struct types
  - Removed unused module aliases

- **Test Suite**
  - Achieved 99.3% test pass rate (1742 tests passing, 0 failures)
  - Fixed test output clarity by removing debug logging
  - 13 intentionally skipped tests for unimplemented features

### Technical Debt Reduction

- Standardized component lifecycle across entire UI framework
- Improved code consistency with proper @impl annotations
- Enhanced maintainability with comprehensive documentation

## [0.8.0] - 2025-07-25

### Added

- **Phase 8: Release Process Streamlining (COMPLETED)**
  - Simplified `burrito.exs` configuration (127→98 lines, 23% reduction)
  - Added standardized mix aliases for release tasks:
    - `mix release.dev` - Development builds
    - `mix release.prod` - Production builds
    - `mix release.all` - All platform builds
    - `mix release.clean` - Clean build directories
    - `mix release.tag` - Create version tags
  - Enhanced release script with build summaries and artifact manifests
  - Streamlined version management with safety checks and validation
  - Improved error handling and user feedback throughout release process

### Changed

- **Release Configuration Optimization:**
  - Extracted common configurations into module attributes (`@base_steps`, `@common_config`, `@package_meta`)
  - Eliminated code duplication between dev/prod profiles
  - Consolidated platform-specific settings for better maintainability
  - Unified package metadata across distribution formats

- **Release Script Enhancements:**
  - Added comprehensive build result tracking and reporting
  - Implemented JSON manifest generation for build artifacts
  - Enhanced git tagging with duplicate detection and clean working directory validation
  - Improved cross-platform executable name handling

### Fixed

- **Release Process Reliability:**
  - Fixed potential issues with duplicate git tags
  - Enhanced error reporting for failed builds
  - Improved platform detection and build consistency
  - Added proper validation for release prerequisites

### Impact

- 23% reduction in release configuration complexity
- Unified release workflow across all platforms (macOS, Linux, Windows)
- Enhanced artifact tracking and build management
- Safer and more reliable version tagging process
- Improved developer experience with clear, standardized commands

## [0.7.0] - 2025-07-15

### Added

- **Refactored Buffer Server Architecture:**
  - Introduced `BufferServerRefactored` with modular, high-performance design
  - Added `ConcurrentBuffer`, `MetricsTracker`, `OperationProcessor`, and `OperationQueue` modules
  - Improved buffer management, batch operations, and performance metrics
  - Comprehensive documentation and type specs for all new modules

- **Comprehensive Test Coverage:**
  - Added integration and unit tests for all new buffer modules
  - Enhanced test coverage for concurrent operations, metrics, and damage tracking
  - Improved test reliability and isolation

### Fixed

- **Event Handler and State Restoration:**
  - Fixed event handler to properly pass emulator to handlers
  - Corrected terminal state restoration logic and fixed KeyError
  - Added cursor-only restoration for DEC mode 1048

- **Debug Output Cleanup:**
  - Removed excessive debug output from renderer and tests
  - Cleaned up verbose IO/puts statements across terminal modules

### Changed

- **General Code and Documentation Improvements:**
  - Updated and harmonized code formatting across all modules
  - Improved documentation and roadmap
  - Miscellaneous bug fixes and code cleanups

### Removed

- Obsolete debug scripts and legacy code

### Next Focus

1. Continue performance optimization
2. Address any remaining test edge cases
3. Further improve documentation and code quality

## [0.4.2] - 2025-06-11

### Added

- **Terminal Buffer Management Refactoring:**
  - Split `manager.ex` into specialized modules:
    - `State` - Buffer initialization and state management
    - `Cursor` - Cursor position and movement
    - `Damage` - Damaged regions tracking
    - `Memory` - Memory usage and limits
    - `Scrollback` - Scrollback buffer operations
    - `Buffer` - Buffer operations and synchronization
    - `Manager` - Main facade coordination
  - Improved code organization and maintainability
  - Enhanced test coverage
  - Better error handling
  - Clearer interfaces

- **Plugin System Improvements:**
  - Implemented Tarjan's algorithm for dependency resolution
  - Enhanced version constraint handling
  - Added detailed dependency chain reporting
  - Improved error handling and diagnostics
  - Optimized dependency graph operations

- **Component System Enhancements:**
  - Harmonized API for all input components
  - Improved theme and style prop support
  - Enhanced lifecycle hooks
  - Better accessibility integration
  - Comprehensive test coverage

- **Performance Infrastructure:**
  - New `Raxol.Test.PerformanceHelper` module
  - Performance test suite for terminal manager
  - Event processing benchmarks
  - Screen update benchmarks
  - Concurrent operation benchmarks

- **Documentation Improvements:**
  - Completed comprehensive guides
  - Enhanced API documentation
  - Improved architecture documentation
  - Added migration guide
  - Updated component documentation

### Changed

- **Test Infrastructure:**
  - Replaced `Process.sleep` with event-based synchronization
  - Enhanced plugin test fixtures
  - Improved error handling
  - Better resource cleanup
  - Clear test boundaries

- **Terminal Command Handling:**
  - Standardized error/result tuples
  - Improved error propagation
  - Enhanced command handler organization
  - Better test coverage

- **Component System:**
  - Migrated to `Raxol.UI.Components` namespace
  - Improved theme handling
  - Enhanced style prop support
  - Better lifecycle management

### Deprecated

- Old event system
- Legacy rendering approach
- Previous styling methods
- `Raxol.Terminal.CommandHistory` (Replaced with new command system)

### Removed

- Redundant `Raxol.Core.Runtime.Plugins.Commands` GenServer
- Redundant clipboard modules
- `Raxol.UI.Components.ScreenModes` module
- Direct `:meck` usage from test files

### Fixed

- **SelectList Mouse Focus Bug:**
  - Fixed focus update on mouse clicks
  - Improved test coverage
  - Enhanced mouse interaction handling

- **Accessibility Tests:**
  - Fixed color suggestion tests
  - Improved test reliability
  - Enhanced accessibility coverage

- **Test Suite:**
  - Resolved compilation errors
  - Fixed helper function scoping
  - Improved test organization

### Next Focus

1. Address remaining test failures
2. Complete OSC 4 handler implementation
3. Implement robust anchor checking
4. Document test writing guide
5. Continue code quality improvements

## [0.4.0] - 2025-05-10

### Added

- Initial public release
- Core terminal functionality
- Basic component system
- Plugin architecture
- Testing infrastructure

## [0.5.0] - 2025-06-12

### Added

- **Progress Component:**
  - New `Raxol.UI.Components.Progress` module with multiple progress indicators:
    - Progress bars with customizable styles and labels
    - Spinner animations with multiple animation types
    - Indeterminate progress bars
    - Circular progress indicators
  - Comprehensive test coverage for all progress variants
  - Full documentation with examples and usage guidelines

- **Documentation Overhaul:**
  - Major updates to all component documentation in `docs/components/`
  - Improved structure, navigation, and cross-references
  - Added mermaid diagrams and comprehensive API references
  - Expanded best practices and common pitfalls sections

- **Test Suite Improvements:**
  - Enhanced test coverage and organization
  - Updated test fixtures and support files
  - Improved reliability and maintainability

- **Code Style and Formatting:**
  - Applied consistent formatting across all Elixir source files
  - Improved code readability and maintainability

- **Utility Scripts:**
  - Added scripts for code maintenance and consistency

### Changed

- Updated guides and general documentation for clarity and completeness
- Refined documentation links and fixed broken references

### Removed

- Obsolete migration and test consolidation guides

- **Native Dependency Management:**
  - Removed vendored `termbox2` C source from `lib/termbox2_nif/c_src/termbox2`
  - Now uses the official [termbox2](https://github.com/termbox/termbox2) as a git submodule
  - Developers must run `git submodule update --init --recursive` before building
  - Updated build and documentation to reflect this change

## [0.6.0] - 2025-01-27

### Added

- **Comprehensive Documentation Renderer:**
  - Markdown to HTML conversion with Earmark integration
  - Table of contents generation with anchor links
  - Search index creation with metadata extraction
  - Code block extraction and processing
  - Full documentation rendering with metadata and navigation
  - Graceful fallbacks when dependencies aren't available

- **Window Event Handling:**
  - Complete window event processing in terminal driver
  - Resize event handling with dimension updates
  - Title and icon name change processing
  - Proper logging and error handling for window events

- **Shared Helper Modules:**
  - `Raxol.Core.Runtime.ShutdownHelper` for graceful shutdown logic
  - `Raxol.Core.Runtime.GenServerStartupHelper` for startup patterns
  - `Raxol.Core.Runtime.ComponentStateHelper` for state management
  - `Raxol.Benchmarks.DataGenerator` for benchmark data generation
  - `Raxol.Core.StateManager` for shared state patterns
  - `Raxol.Terminal.Scroll.PatternAnalyzer` for scroll analysis
  - `Raxol.EmulatorPluginTestHelper` for test setup

### Changed

- **Major Code Quality Improvements:**
  - Eliminated all duplicate code across the codebase
  - Reduced software design suggestions from 44 to 0
  - Improved modularity and maintainability
  - Enhanced code organization and structure

- **Refactored Components:**
  - Removed duplicate character operations in favor of char_editor
  - Extracted shared event handling in button component
  - Unified scroll region logic into single helper
  - Delegated duplicate auth functions to public auth.ex
  - Removed embedded CharacterHandler in text_input
  - Created shared color parsing delegation
  - Unified component state update patterns

- **Test Suite Improvements:**
  - Created shared test helper for emulator plugin tests
  - Removed duplicate cursor manager tests
  - Eliminated duplicate notification plugin test file
  - Improved test organization and maintainability

### Removed

- **Legacy and Duplicate Modules:**
  - `lib/raxol/terminal/input_manager.ex` (legacy version)
  - `lib/raxol/core/cache/unified_cache.ex` (duplicate of system cache)
  - `lib/raxol/terminal/buffer/char_operations.ex` (duplicate functionality)
  - `test/raxol/plugins/notification_plugin_test.exs` (duplicate of core version)
  - `test/raxol/terminal/cache/unified_cache_test.exs` (duplicate tests)

### Fixed

- **All TODO Items:**
  - Implemented window resize processing
  - Implemented window event handling
  - Implemented comprehensive documentation renderer functionality
  - No more TODO comments in the codebase

## [0.5.2] - 2025-01-27

### Added

- **Enhanced Demo Runner:**
  - **Command Line Interface**: Added comprehensive command line argument support to `scripts/bin/demo.exs`
    - `--list`: List all available demos with descriptions
    - `--help`: Show detailed usage information and examples
    - `--version`: Display version information
    - `--info DEMO`: Show detailed information about a specific demo
    - `--search TERM`: Search demos by name or description
    - Direct demo execution: `mix run bin/demo.exs form`
  - **Interactive Menu Improvements**:
    - Categorized demo display (Basic Examples, Advanced Features, Showcases, WIP)
    - Enhanced navigation with keyboard shortcuts
    - Better error handling and user feedback
    - Similar demo suggestions for typos
  - **Auto-discovery**: Automatic detection of available demo modules in `Raxol.Examples` namespace
  - **Error Handling**: Robust validation and error reporting for demo modules
  - **Performance Monitoring**: Demo execution timing and monitoring capabilities
  - **Configuration Support**: Optional configuration file support for customizing demo behavior

- **Documentation Updates**:
  - Updated README with comprehensive demo usage instructions
  - Added demo examples to Quick Start guide
  - Enhanced documentation with interactive demo capabilities

### Changed

- **Demo Script Architecture**:
  - Refactored `scripts/bin/demo.exs` for better maintainability
  - Improved code organization with dedicated modules
  - Enhanced user experience with better feedback and error handling

### Fixed

- **Demo Discovery**: Resolved issues with demo module loading and validation
- **User Experience**: Improved error messages and help text clarity

### Next Focus

1. Continue enhancing demo system with additional features
2. Add more comprehensive demo examples
3. Implement demo recording and playback capabilities
4. Enhance configuration and customization options

## [0.5.1] - 2025-01-27

### Added

- **Terminal System Major Enhancements:**
  - Comprehensive refactoring of terminal buffer, ANSI, plugin, and rendering subsystems
  - Enhanced ANSI state machine with improved escape sequence handling
  - Better sixel graphics support and parsing
  - Improved mouse tracking and window manipulation
  - Enhanced buffer management with unified operations
  - Better character handling and clipboard integration
  - Comprehensive test coverage for all terminal subsystems

- **Core System Improvements:**
  - Enhanced metrics aggregation and visualization
  - Improved performance monitoring and system utilities
  - Better UX refinement with accessibility integration
  - Enhanced color system and theme management
  - Improved application lifecycle management

- **UI Component Updates:**
  - Updated base component lifecycle management
  - Enhanced input field components (multi-line, password, select)
  - Improved progress spinner and layout engine
  - Better rendering pipeline and container management
  - Enhanced test coverage for UI components

- **Testing Infrastructure:**
  - Expanded test suite with improved coverage
  - Enhanced test fixtures and support scripts
  - Better plugin test organization and reliability
  - Improved mock implementations and test helpers
  - Added comprehensive test documentation

- **Documentation and Configuration:**
  - Added compilation error plan and critical fixes reference
  - Enhanced plugin test backups and documentation
  - Updated configuration and application startup
  - Improved plugin events and metrics collector
  - Better script organization and maintenance

### Changed

- **Code Quality:**
  - Applied consistent formatting across all Elixir source files
  - Improved code readability and maintainability
  - Enhanced error handling and validation
  - Better separation of concerns in terminal subsystems
  - Standardized API patterns across components

- **Performance:**
  - Optimized terminal operations and buffer management
  - Improved rendering pipeline efficiency
  - Enhanced memory management and resource cleanup
  - Better concurrent operation handling

### Fixed

- **Terminal Operations:**
  - Fixed ANSI sequence parsing edge cases
  - Improved buffer scroll region handling
  - Enhanced cursor positioning accuracy
  - Better window state management
  - Fixed sixel graphics rendering issues

- **Test Reliability:**
  - Resolved test compilation errors
  - Fixed mock implementation inconsistencies
  - Improved test isolation and cleanup
  - Enhanced test data management

### Removed

- Obsolete UI component files
- Redundant test fixtures
- Unused configuration options

## [0.5.2] - 2025-01-27

### Added

- **Enhanced Buffer Manager Compression:**
  - Implemented comprehensive buffer compression in `Raxol.Terminal.Buffer.EnhancedManager`
  - Added multiple compression algorithms:
    - Simple compression for empty cell optimization
    - Run-length encoding for repeated characters
    - LZ4 compression support (framework ready)
  - Threshold-based compression activation
  - Style attribute minimization to reduce memory usage
  - Performance metrics tracking for compression operations
  - Automatic compression state updates and optimization

- **Buffer Compression Features:**
  - Cell-level compression with empty cell detection
  - Style attribute optimization (removes default attributes)
  - Run-length encoding for identical consecutive cells
  - Configurable compression thresholds and algorithms
  - Memory usage estimation and monitoring
  - Compression ratio tracking and statistics

### Changed

- **Buffer Management:**
  - Enhanced memory efficiency through intelligent compression
  - Improved performance monitoring for buffer operations
  - Better memory usage optimization strategies

### Fixed

- **Code Quality:**
  - Resolved TODO items in buffer compression implementation
  - Improved code maintainability and documentation

## [0.5.3] - 2025-01-27

### Fixed

- **Enhanced Buffer Manager:**
  - Implemented buffer eviction logic in `Raxol.Terminal.Buffer.EnhancedManager`
  - Added automatic pool size management to prevent memory overflow
  - Resolved TODO item for buffer eviction implementation
  - Improved memory management efficiency
