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Change Log

[Unreleased]

[1.4.0] - 2026-03-15

Added

  • ST syntax highlighting injected into <Declaration>, <ST>, <Implementation>, and <Interface> XML elements in TwinCAT/CoDeSys export files (plain content and CDATA-wrapped)
  • Hardware address literals (%IX0.0, %QW1, %MD100, etc.) highlighted as constant.other.hardware-address.st
  • Pragma/attribute blocks ({attribute 'xxx'}, {IF}, {ENDIF}, etc.) highlighted as meta.pragma.st with keyword.other.pragma.st keyword scopes
  • SFC action qualifier keywords (N, S, R, L, D, P, SD, DS, SL) highlighted as keyword.other.sfc-qualifier.st
  • ANY_CHAR and ANY_CHARS generic types added to storage.type.st
  • CLASS, END_CLASS, INTERFACE, END_INTERFACE, METHOD, END_METHOD, PRIVATE, PROTECTED, PUBLIC, INTERNAL, END_NAMESPACE added to keyword.declaration.st
  • PROPERTY added to keyword.other.st
  • Named parameters: IEC 61131-3 escape character $ (not \) used in string escape patterns
  • OF in ARRAY [..] OF scoped as keyword.other.array-of.st (distinct from CASE...OF control scope)
  • Named parameters in FB/function calls (Param :=, Param =>) now scoped as variable.parameter.st in syntax highlighting (#94)
  • Signature Help for function and function block calls: triggers on ( and ,, supports manual trigger, highlights active parameter, includes standard + workspace signatures (#33)
  • Diagnostic error for assignment to CONSTANT-qualified variables (VAR CONSTANT, VAR_GLOBAL CONSTANT); paren-depth guard avoids false positives on named FB parameters (#60)
  • Diagnostic error for out-of-bounds array access with constant/literal indices; supports 1-D, multi-dimensional, zero-based, and negative-lower-bound arrays; variable indices ignored (#61)
  • FOR loop bounds validation: BY 0 flagged as error (infinite loop), reverse range with positive/negative BY flagged as warning (never executes), start equals end flagged as hint; only constant bounds checked (#62)
  • Diagnostic warning and quick-fix code action for := vs = confusion: bare = in statement position flagged with "Replace '=' with ':='" action; := inside IF/ELSIF/WHILE/UNTIL condition flagged with "Replace ':=' with '='" action (#63)
  • Cross-file rename: F2 now renames symbols across all workspace files, not just the active document

Fixed

  • Multi-line FB calls with closing ) on its own line falsely flagged as "Unmatched closing parenthesis"; fixed with cross-line depth tracking
  • Output named parameters (Param =>) falsely flagged as undefined identifiers; => pattern now excluded from identifier extraction

Changed

  • Bump @types/node to ^25.0.0, glob to ^13.0.0; add skipLibCheck to tsconfig for TS 5.x / @types/node 25 compatibility (#124)
  • Standardized manual test fixture naming (removed test_/test- prefixes) and updated references
  • Removed redundant QA and screenshot placeholder docs from repo (docs/QA_CHECKLIST.md, images/README.md)

[1.3.0] - 2026-02-20

Added

  • Pre-release QA manual testing checklist covering all 14 feature categories (#75)
  • Manual test fixtures for rename symbol, find references, .iecst extension, commands, formatting settings (#75)
  • Rich hover tooltips for standard function blocks: parameter tables, behavior descriptions, usage examples (#22)
  • Advanced diagnostics and linting: missing semicolons, duplicate declarations, undefined variables, unused variables, type mismatches (#6)
  • Semantic analysis powered by AST parser symbols for deeper code inspection (#6)
  • Quick fixes for semantic diagnostics: insert semicolon, remove duplicate declaration, remove unused variable (#6)
  • Levenshtein-based fuzzy matching for "did you mean?" suggestions on undefined identifiers (#6)
  • Code formatting (Shift+Alt+F): keyword casing, indentation, operator spacing, VAR block alignment, trailing whitespace removal (#29)
  • Format Selection support for partial document formatting (#29)
  • Configurable formatting settings: keywordCase, insertSpacesAroundOperators, alignVarDeclarations, trimTrailingWhitespace, insertFinalNewline (#29)
  • Rename Symbol (F2): rename variables, functions, FBs, programs with IEC 61131-3 validation, comment awareness (#28)
  • Code actions and quick fixes: auto-insert missing END blocks, close unclosed strings, fix unmatched parentheses (#26)
  • Real-time diagnostics with Problems panel integration: unmatched blocks, unclosed strings, unmatched parentheses (#27)
  • AST parser rewrite with multi-line statement accumulator architecture (#41)
  • 62 unit tests for workspace-indexer, member-access-provider, definition-provider, completion-provider (44 → 106 total) (#44)
  • 45 unit tests for diagnostics provider (106 → 151 total) (#27)
  • 31 unit tests for code action provider (151 → 182 total) (#26)
  • 58 unit tests for rename provider (182 → 240 total) (#28)
  • 67 unit tests for formatting provider (240 → 307 total) (#29)
  • 46 unit tests for Phase 2 semantic diagnostics, levenshtein/fuzzy matching, and code actions (307 → 353 total) (#6)
  • Clean build steps for compile and webpack scripts

Changed

  • License changed from BUSL-1.1 to MIT (#78)
  • Extracted getExtensionPath from server.ts into extension-path.ts for testability (#44)
  • Updated all npm dependencies (TypeScript 4.9→5.9, webpack 5.99→5.105, node types 16→20) (#50)
  • Removed legacy parser (parser.ts) and its tests

Fixed

  • Parser regex fails on multi-line variable declarations (#41)
  • Verbose console.log in definition provider polluting test and server output

Removed

  • Stale documentation (FEATURES.md, MANUAL_TEST_GUIDE.md, RELEASE_PLAN.md, TESTING.md)
  • Dead scripts (pretest, compile-test, test:watch, test:pre-commit)
  • Stale files (test-local.sh, HOW_TO_TEST_LOCALLY.md)
  • Stale branches (develop, feature/issue-5-rename-symbol-support)

[1.2.5] - 2026-02-10

Fixed

  • Duplicate completion provider conflicts (#37)
  • npm test failing in clean environments (#38)
  • iec61131-definitions/ inaccessible in packaged extension (#39)
  • Hardcoded workspace root breaking in renamed folders (#40)
  • Inconsistent case-insensitive symbol lookup (#42)
  • Memory leak from missing index cleanup on file close (#43)

Changed

  • Removed duplicate completion provider from extension client
  • Extension path passed via LSP initialization instead of hardcoded lookup
  • Normalized symbol names for IEC 61131-3 case-insensitive compliance
  • Debounced document change handling for typing performance

[1.2.4] - 2025-06-21

Fixed

  • Improved error handling for LSP client connection
  • Fixed "Pending response rejected since connection got disposed" error
  • Added proper shutdown sequence for LSP server process

Changed

  • Enhanced language server connection stability
  • Improved error reporting for better diagnostics
  • Completed migration to webpack bundling for better reliability

[1.2.3] - 2025-06-21

Fixed

  • Comprehensive fix for LSP initialization error with vscode-languageclient module
  • Improved module resolution with fallback mechanisms
  • Enhanced error reporting for language server initialization issues

Changed

  • Migrated to webpack-based bundling for improved performance and reliability
  • Reduced extension size by optimizing included dependencies
  • Improved extension startup time by bundling code into fewer files

[1.2.2] - 2025-06-21

Fixed

  • Critical bug fix: resolved LSP initialization error with vscode-languageclient module
  • Added robust error handling for language server activation
  • Added LSP status check command to verify Language Server Protocol is running

[1.2.1] - 2025-06-19

Fixed

  • Language Server Protocol (LSP) activation issues
  • Enhanced error handling for LSP initialization
  • Added diagnostic tools for LSP status verification
  • Improved server-client communication with detailed logging

[1.2.0] - 2025-06-19

Added

  • Go to Definition & Find References: Navigate through Structured Text code
  • Member access navigation for function blocks (instance.member → definition)
  • Cross-file navigation between instances and library definitions
  • Smart hover information for variables and function block members
  • Comprehensive symbol indexing across workspace
  • Language Server Protocol (LSP) Integration:
    • Client-server architecture for advanced IDE features
    • Workspace indexing for cross-file references
    • Enhanced symbol provider with member access support
  • IEC 61131-3 Definition Files:
    • Standard function block definition files (TON, TOF, TP, CTU, etc.)
    • Enhanced documentation and specification compliance
    • Sample files and test cases for manual validation

Improved

  • Reorganized project structure with better separation of concerns
  • Enhanced documentation with comprehensive test guides
  • Better performance with smarter caching and incremental updates
  • More robust parser with better error handling

[1.1.0] - 2025-06-16

Added

  • Function Block Instance Member Completion: Auto-complete for function block output members
    • Dot notation support (e.g., myTimer.Q, upCounter.CV)
    • Support for all IEC 61131-3 standard function blocks (TON, TOF, TP, CTU, CTD, CTUD, R_TRIG, F_TRIG, RS, SR)
    • Type-aware suggestions with detailed descriptions
  • Enhanced parser with function block instance extraction
  • Enhanced code snippets and examples

Improved

  • Syntax highlighting with additional keywords (END_CONFIGURATION, END_RESOURCE)
  • Better variable and function block detection
  • Enhanced error handling and performance
  • Updated documentation and testing infrastructure

Fixed

  • Missing syntax highlighting for configuration keywords
  • Parser edge cases for variable declarations

[1.0.1] - 2024-01-09 15:30:00

Changed

  • Updated publisher ID from ControlForge to ControlForgeSystems
  • Removed Hello World sample command
  • Improved extension description for marketplace listing
  • Updated repository and website URLs

[1.0.0] - 2024-01-09

Added

  • Initial release
  • Syntax highlighting for Structured Text
  • Basic syntax validation
  • Support for .st and .iecst files
  • IEC 61131-3 language features