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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.

[2.0.0.1] — 2026-09-15 — Release Revision: Performance, Security, and Tooling

Release Tag: v2.0.0.1

Added

  • Release revision documentation in docs/ReleaseNotes.md, covering the complete change set since v2.0.0.
  • tsc lint --fix support for applying safe linter fixes from the command line.
  • Additional stdlib registration and behavior tests across database, CSV, JWT, PDF, FTP, math, media, and notification modules.
  • Additional AST, parser, runtime, web, and package-manager coverage for previously untested paths.

Fixed

  • Reduced formatter, VM debugger, bytecode disassembler, LSP, IR, package-manager, and stdlib allocation overhead on hot paths.
  • Closed missing capability checks in web, notification, canvas, and related privileged operations.
  • Fixed command-injection risks in the doctor command and Windows notification handling.
  • Corrected the loopback IP safety validation and several documentation links.

Changed

  • Optimized IR predecessor mapping, diagnostic quick-fix lookup, LSP character lookup, SQLite query preparation, and capability validation.
  • Refactored large stdlib, DSL, semantic-analysis, resolver, packager, and CLI functions into smaller units without changing public behavior.
  • Added release guidance for the vMAJOR.MINOR.PATCH.REVISION tag convention. Cargo packages remain at SemVer 2.0.0 for this revision release.

[2.0.0] — 2026-07-26 — Syntax Freeze

No breaking syntax changes will be made after this release in the 2.x series.

Language Freeze Decisions

Five language design questions were locked permanently on 2026-07-26:

Decision Resolution
compat/ handling examples/compat/ kept permanently; each file gets # LEGACY COMPAT TEST header
Stdlib call style Qualified (math.abs(), json.parse()); implicit only for true built-ins (say, ask, env, file)
Null literal null is canonical; none is deprecated alias → TSW1011
Loop semantics loop N = counted (runs exactly N times); repeat cond = while (runs while condition is true)
String interpolation $"..." is canonical; f"..." is deprecated alias → TSW1012

Added

  • Loop token variant — new canonical keyword loop for counted loops (loop N)
  • Parallel token variant — new canonical keyword parallel for parallel blocks
  • Default token variant — new canonical keyword default for match default arms
  • Full TSW error code namespace — TSW1001–TSW1014, TSW2001–TSW2002, TSI3001 all defined
  • docs/engineering/LANGUAGE_FREEZE_2.0.md — permanent freeze declaration document
  • Expanded semantic analysis — 10 canonical rules now formally documented in 10_semantic_analysis.md
  • Full grammar expansion — 03_grammar_ebnf.md updated with lambda, bitwise ops, DSL, parallel, $"...", loop, and complete operator precedence

Changed (Compiler)

  • token_kind.rs — inverted canonical/deprecated classification:
    • Canonical 2.0 (no warning): do, send, when, loop, repeat, for, in, match, case, default, try, catch, throw, use, class, struct, enum, trait, interface, const, null, say, ask, break, continue, else, async, await, parallel, end, export, new, self, true, false, typeof, with
    • Deprecated Alias (emit TSW): build, make, return, model, if, elif, while, import, from, let, var, fun, function, attempt, none, keep, give, stop, skip, each, switch, be, equals, then
  • errors/src/lib.rs — E0104 description updated to "Expected end to close block"
  • to_canonical() — inverted: now maps Build→Do, Return→Send, If→When, While→Repeat, Model→Class, Import/From→Use, etc.
  • is_canonical_keyword() — updated to reflect 2.0 canonical set
  • is_alias_keyword() — updated to reflect 2.0 deprecated set
  • is_future_reserved_keyword() — narrowed to only Type, Yield, Spawn, Pub, Mut
  • FStringStart.static_lexeme() — changed from f" to $" (canonical)

Changed (Docs)

  • docs/engineering/01_language_spec_v1.md — full rewrite; all canonical keywords correct
  • docs/engineering/03_grammar_ebnf.md — expanded with all missing grammar rules
  • docs/engineering/10_semantic_analysis.md — expanded with 10 canonical semantic rules
  • docs/engineering/14_error_codes.md — full TSW namespace documented
  • docs/StyleGuide.md — full rewrite with tsc fmt specification
  • docs/MigrationGuide.md — rewritten as 1.0.8 → 2.0 guide
  • docs/LanguageGuide.md — updated with $"...", loop, parallel, null examples
  • README.md — hero example updated to canonical 2.0 syntax

Changed (Examples)

  • examples/compat/ files — added # LEGACY COMPAT TEST header to each file

Deprecated (Keyword Reclassification)

The following keywords, previously documented as canonical in some docs, are now officially deprecated and will emit warnings:

build, make, let, var, return, give, if, elif, while, import, from, each, attempt, model, none, f"...", keep, stop, skip, switch, then, be, equals

These keywords continue to compile in the 2.x series. They are never removed — only deprecated. Run tsc migrate . to auto-convert.

[1.0.8] — 2026-06-01

Added

  • Created 17 Cargo workspace member crates, covering the entire compiler, runtime, and tools stack.
  • Unified common types (Span, NodeId, Ident) inside the techscript_common crate.
  • Unified syntax constants, keyword lists, tokens, and operator precedence levels inside the techscript_syntax crate.
  • Scaffolding skeleton for all remaining modules: AST, Lexer, Parser, Errors, Semantic Analyzer, Interpreter, VM, GC, Builtins, Stdlib, CLI, LSP, Formatter, Linter, and Package Manager.
  • Established default placeholder unit tests and example entry points.
  • Configured CI/CD workflows and GitHub templates.