release: v0.5.20 - C# support, fuzzy search, bug fixes

- C# language parser with symbol extraction and relationship tracking
- File extensions: .cs, .csx, .cshtml auto-configured in codanna init
- Fuzzy search now handles missing character typos in full symbol names
- Dual fuzzy strategy: ngram tokens + whole word matching
- BREAKING: Tantivy schema name field changed from TEXT to STRING (requires reindex)
- Automatic reverse relationship creation for bidirectional navigation
- Fixed file ID counter race condition during batch operations
- Fixed Windows file locking with retry logic and error logging
- C# node_discovery.txt generation added to exploration tests

All tests passing (447 total)

BREAKING CHANGE: Requires full reindex with 'codanna index --force'

Author: bartolli

CHANGELOG.md

@@ -5,6 +5,36 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.5.20] - 2025-10-02
+
+### Added
+- C# language support with full parser implementation (PR#39)
+  - Symbol extraction for classes, interfaces, structs, enums, methods, properties, fields
+  - Relationship tracking for inheritance, interface implementation, and method calls
+  - XML documentation comment extraction
+  - File extensions: `.cs`, `.csx`, `.cshtml`
+- Fuzzy search on non-tokenized name field for whole-word typo tolerance
+  - Handles missing character typos in full symbol names (e.g., "ArchivService" finds "ArchiveService")
+  - Dual fuzzy strategy: ngram tokens for partial matches + whole words for full name typos
+
+### Changed
+- **BREAKING**: Tantivy schema `name` field changed from TEXT to STRING
+  - Enables exact matching without tokenization for fuzzy search
+  - Requires full reindex: `codanna index --force`
+- **PERFORMANCE**: Batch commits every 100 files instead of per-file commits
+  - 10-50x faster indexing (varies by platform and file count)
+  - macOS: ~10x improvement on typical projects
+  - Windows: 25-50x improvement (1-2 files/s → 46 files/s on 4,453 file project)
+  - Reduces disk I/O, segment creation, and cache rebuilds
+- Automatic reverse relationship creation for bidirectional graph navigation
+  - Implements ↔ ImplementedBy, Extends ↔ ExtendedBy, Calls ↔ CalledBy, Uses ↔ UsedBy
+
+### Fixed
+- File ID counter race condition during batch operations
+  - Pending counter prevents stale committed values from causing duplicate IDs
+- Windows file locking issues with proper retry logic and error logging
+  - Symbol cache and persistence layer handle OS error 1224 and permission denied
+
 ## [0.5.19] - 2025-10-01
 
 ### Added

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "codanna"
-version = "0.5.19"
+version = "0.5.20"
 authors = ["Angel Bartolli <bartolli@gmail.com>"]
 edition = "2024"
 description = "Code Intelligence for Large Language Models"

Cargo.toml

@@ -1,6 +1,6 @@
 # C Parser Coverage Report
 
-*Generated: 2025-10-02 21:49:28 UTC*
+*Generated: 2025-10-02 22:34:05 UTC*
 
 ## Summary
 - Nodes in file: 145

contributing/parsers/c/AUDIT_REPORT.md

@@ -1,6 +1,6 @@
 # C Grammar Analysis
 
-*Generated: 2025-10-02 21:49:28 UTC*
+*Generated: 2025-10-02 22:34:05 UTC*
 
 ## Statistics
 - Total nodes in grammar JSON: 132

contributing/parsers/c/GRAMMAR_ANALYSIS.md

@@ -1,5 +1,5 @@
 === C Language ABI-15 COMPREHENSIVE NODE MAPPING ===
-  Generated: 2025-10-02 21:49:28 UTC
+  Generated: 2025-10-02 22:34:05 UTC
   ABI Version: 15
   Node kind count: 145
 

contributing/parsers/c/node_discovery.txt

@@ -1,6 +1,6 @@
 # C++ Parser Coverage Report
 
-*Generated: 2025-10-02 21:49:28 UTC*
+*Generated: 2025-10-02 22:34:05 UTC*
 
 ## Summary
 - Nodes in file: 131

contributing/parsers/cpp/AUDIT_REPORT.md

@@ -1,6 +1,6 @@
 # C++ Grammar Analysis
 
-*Generated: 2025-10-02 21:49:28 UTC*
+*Generated: 2025-10-02 22:34:05 UTC*
 
 ## Statistics
 - Total nodes in grammar JSON: 223

contributing/parsers/cpp/GRAMMAR_ANALYSIS.md

@@ -1,5 +1,5 @@
 === C++ Language ABI-15 COMPREHENSIVE NODE MAPPING ===
-  Generated: 2025-10-02 21:49:28 UTC
+  Generated: 2025-10-02 22:34:05 UTC
   ABI Version: 14
   Node kind count: 131
 

contributing/parsers/cpp/node_discovery.txt

@@ -1,6 +1,6 @@
 # C# Parser Coverage Report
 
-*Generated: 2025-10-02 21:49:28 UTC*
+*Generated: 2025-10-02 22:46:39 UTC*
 
 ## Summary
 - Nodes in file: 108