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feat(kernel): R7b C# walker — csharp module, tree-sitter-c-sharp 0.23.5 pin, csharp default-routed (#1378)

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Second R7b port, checklist-first recipe (docs/design/csharp-kernel-port-checklist.md;
parity passed FIRST RUN again). No grammar bump — the #717 vendored wasm verified
table-identical to crate 0.23.5 (ABI 15, STATE_COUNT 8053, node-kind + field tables);
first port with no grammar-prep step. The #237 #if-blanking preParse stays TS-side
via the existing route-point hoist.

Walker preserves bug-for-bug: the single-namespace-node quirks (second namespace
nests under the first, nested namespaces leave no trace, import refs hang off the
namespace node), raw member-access callee texts (this./base./literal receivers,
multi-line fluent chains) with unconditional chain re-encode, deliberate emission
holes (property accessor/expression bodies, ctor initializers, delegates/events/
operators/indexers/local functions, top-level locals), garbage extends refs
((repo) primary-ctor args, BaseDto(Name) record bases, enum : byte), the alias-
import moduleName quirks, nameof-as-call, CSHARP fn-ref spec (+= subscription,
this.X bare-name form, argument layer, initializer lists), C# type-ref engine
(nested-generic returnType failure included), and value-ref shadow pruning.

Gates: sweeps 0-diff serilog 211/216 / Newtonsoft.Json 914/945 / jellyfin
2104/2105 (deferrals match the survey's per-repo predictions — both-arm #if
damage; default --max-deferral 0.1 holds, no c/cpp exemption); full-init dumps
byte-identical ×3 (14.0k/109.1k/210.8k lines); kernel-csharp-parity suite
(torture ×3 + CRLF variants + 8 micro-pins + defer) + csharp grammar-parity row;
full suite 2,608 ×2 under CODEGRAPH_KERNEL_EXPECT=1. DEFAULT_ROUTED += csharp
(11 langs).

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Colby Mchenry
2026-07-20 13:46:12 -05:00
committed by GitHub
co-authored by Claude Fable 5
parent f1ca991943
commit 286e9ccc2d
15 changed files with 2890 additions and 6 deletions
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docs/design/rust-kernel-migration-plan.md
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@@ -605,7 +605,7 @@ parity before porting the language.
| python | `languages/python.ts` | T1 | crates.io | Third. Decorator extraction feeds framework route detection — parity required. **PORTED + DEFAULT-ON (§4e).** | ✅ |
| go | `languages/go.ts` | T1 | crates.io | Third (tie). Value-reference edges ship here too (#897). **PORTED + DEFAULT-ON (§4e).** | ✅ |
| ruby, php | dedicated files | T1 | crates.io | Straightforward; PHP property-receiver shapes (#1220/#1251) are RESOLUTION-side, unaffected. | ☐ |
| csharp | `languages/csharp.ts` | T1 | crates.io | Plain. | ☐ |
| csharp | `languages/csharp.ts` | T1 | crates.io | **DONE (R7b #2, 2026-07-20)** — `csharp.rs` walker; NO grammar bump (the #717 vendored wasm verified table-identical to crate 0.23.5 — first port with no grammar-prep step); the #237 `#if` preParse stays TS-side via the route-point hoist. Parity 0-diff on serilog/Newtonsoft.Json/jellyfin (3,229 files) + dump byte-identical ×3; deferral 0.05–3.3% = both-arm `#if` damage. Quirk list: docs/design/csharp-kernel-port-checklist.md. | ☑ |
| rust | `languages/rust.ts` | T1 | crates.io | **DONE (R7b #1, 2026-07-20)** — `rustlang.rs` walker; grammar bumped to v0.24.2 (crate + vendored wasm together). Parity 0-diff on ripgrep/tokio/rust-analyzer + dump byte-identical ×3; rust-analyzer's parser crates defer 18% (token-macro tables, both-arm parse errors — grammar-inherent). Quirk list: docs/design/rust-lang-kernel-port-checklist.md. | ☑ |
| dart, scala, lua, luau, r | dedicated files | T1 | crates.io (luau/r/scala: verify crate freshness vs our wasm) | Long-tail T1; port opportunistically after the big five. | ☐ |
| kotlin | `languages/kotlin.ts` | T1½ | crates.io | Expect/actual pairing is synthesis-side (fine); extraction is clean but validate against a KMP repo. | ☐ |