Sourced from github.com/odvcencio/gotreesitter's releases.

v0.12.1

Full Changelog: odvcencio/gotreesitter@v0.11.2...v0.12.1

v0.11.2 keeps the recent grammargen parity work moving without reopening the heavy generator lanes.

Highlights

• restore DFA lex-mode parity at whitespace boundaries for CSS and JavaScript corpus cases
• extend COBOL imported-grammar parity with safer external-scanner adaptation and transitive passthrough normalization
• add focused TypeScript, TSX, and COBOL snippet parity coverage and include CSS in the isolated focus-target harness
• backfill CHANGELOG history through v0.11.1 so the released version record matches the shipped tags

Validation

• GitHub Actions ci passed on main at 13e0a6d (build, freshness, parity-cgo)
• isolated Docker real-corpus runs passed for css, javascript, typescript, tsx, and cobol with 25/25 no-error, sexpr parity, and deep parity in each lane

v0.11.1 rolls up the parser and grammargen parity work that just landed on main via PR #16.

Highlights

• Restores CSS real-corpus parity to 25/25 no-error, sexpr parity, and deep parity.
• Skips grammargen conflict diagnostics/provenance on the plain GenerateLanguage fast path.
• Fixes parser regressions around after-whitespace lex modes, unary reduction collapse, and Python pass-statement normalization.
• Carries forward broader parity fixes across C/C++, JavaScript/TypeScript/TSX, COBOL, and the focused Docker parity harness.

Validation

• Merged from PR #16 after build, freshness, parity-cgo, and perf-regression all passed.

v0.10.0

Highlights

• add grammargen.GenerateLanguageAndBlob and GenerateLanguageAndBlobWithContext so callers can obtain both the compiled language and serialized blob from one generation pass
• restore parser normalization and grammargen helper behavior needed by downstream grammar-extension work
• split parity validation into fast smoke mode and explicit exhaustive mode so required CI and local iteration stay practical

Included fixes

• parser result normalization for invisible wrappers, C cast handling, and C# tuple pattern shape
• LR/repetition and extra-chain handling updates in grammargen
• Python external scanner incremental reuse disabled until its state reuse is correct
• race fix in grammars/gateway_test.go progress bookkeeping
• calc grammar precedence cleanup for the built-in test grammar

Validation

• smoke parity gate now passes in roughly 53 seconds instead of requiring the full exhaustive parity sweep
• full exhaustive parity remains available via GTS_PARITY_MODE=exhaustive and the manual CI workflow

Sourced from github.com/odvcencio/gotreesitter's changelog.

[0.12.1] - 2026-03-28

Changed

• Refreshed the README roadmap/version snapshot so it reflects the shipped grammargen release line and the current parser/performance priorities.

Fixed

• grammars/scanner_lookup_test.go no longer copies a full Language value when checking scanner adaptation, avoiding the go vet lock-copy failure caused by embedded sync.Once fields.

[0.12.0] - 2026-03-28

Added

• grammargen now imports and emits tree-sitter ABI 15 reserved-word sets, preserving reserved-word metadata through grammar extension and normalization.
• Added Python pattern-matching and f-string parity coverage, plus comprehensive YAML and C# parity and regression suites including a Docker-isolated C# CGO regression lane.
• Added parser recovery and normalization coverage for Rust dot ranges, Rust token trees and struct expressions, YAML recovered roots, and C# namespaces, query expressions, type declarations, Unicode identifiers, and implicit var restoration.

Changed

• GLR stack equivalence checks now skip recursive frontier descent where possible and cache frontier equivalence per parse to reduce duplicate merge work on ambiguous parses.

Fixed

• Restored Python real-corpus parity with keyword-leaf repair, print and interpolation normalization, and trailing self-call recovery in repaired blocks.
• Tightened Rust parity for macro token bindings, token trees, pattern statements, recovered function items, and struct-expression spans.
• Imported-language scanner adaptation now preserves existing ExternalLexStates instead of overwriting them during scanner wiring.

[0.11.2] - 2026-03-26

Added

• Focused TypeScript and TSX snippet parity cases for const type parameters, template literal types, enums, and class method bodies drawn from corpus-style inputs.
• COBOL snippet parity coverage for close/open statements, PIC forms, and perform ... varying cases that previously escaped smaller parity checks.
• CSS to the curated cgo_harness focus-target board so it runs through the same isolated real-corpus and cgo parity entrypoints as the other tracked grammars.

Fixed

• DFA token selection now evaluates base and after-whitespace lex modes from one shared path, restoring CSS function-value parity and JavaScript template-string corpus parity without skipping valid immediate tokens.
• Imported-language parity adapts external scanners more defensively, including lowercase grammar-name lookup, so generated COBOL scanner wiring stays aligned with embedded references.
• Hidden passthrough flattening preserves transitive alternatives without recursing indefinitely, keeping COBOL normalization parity-safe on imported grammars.
• The COBOL real-corpus lane no longer forces the choice-lifting threshold that was driving deep-parity regressions.

[0.11.1] - 2026-03-25

Changed

• grammargen skips conflict diagnostics and provenance on the plain GenerateLanguage fast path unless a report or LR splitting actually needs them.

Fixed

• Restored CSS real-corpus parity to 25/25 on no-error, sexpr parity, and deep parity.
• Tightened parser and grammargen parity across C/C++, JavaScript/TypeScript/TSX, COBOL, and C# normalization paths.
• Fixed after-whitespace lex modes, unary reduction collapse, and Python pass-statement normalization regressions called out in the v0.11.1 release.

[0.11.0] - 2026-03-24

Added

• Grammar subset support with build tags and blob overrides for smaller focused builds.

... (truncated)

• 5284b99 release: version 0.12.1
• b9bf002 release: version 0.12.0
• c14ec7e add(c_sharp): C# grammar parity and recovery normalization
• 7dfba72 add(yaml): GLR recovery normalization and comprehensive parity tests
• 2ac215a fix(grammars): preserve existing ExternalLexStates during scanner adaptation
• d177893 add(rust): dot-range normalization and extensive Rust recovery functions
• d4466a0 Merge pull request #15 from odvcencio/pr14-fix3-on-pr14
• 7870442 fix(grammargen): recover rust token trees in parity tests
• 42e8d8a fix(grammargen): recover Rust pattern statements in parity
• 695ee7c fix(grammargen): recover Rust struct expressions in parity
• Additional commits viewable in compare view

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