C# Evolver Support (bf-1kg)

Status: Already Completed

This work was already completed in commit de15046 (feat(evolver): add C# language support).

What Was Already Done

1. arena.go - buildCandidate() ✅

Lines 473-491 include complete C# support:

Writes source to bot.cs
Checks for dotnet-script first (preferred, no compilation)
Falls back to mcs (Mono C# compiler) → compile to bot.exe, run with mono
Returns clear error if neither compiler is available

2. defender_strategy.cs.txt ✅

File exists at cmd/acb-evolver/internal/db/seeds/defender_strategy.cs.txt

Contains the complete defender bot implementation (501 lines)
Single-file version combining Program.cs, Strategy.cs, and Grid.cs logic

3. seed.go - defender seed entry ✅

Lines 122-128 include the defender seed:

Name: "defender"
Language: "csharp"
Island: gamma (defensive/adaptive)
Behavior vector: aggression=0.3, economy=0.4

4. builder.go - language options ✅

Lines 318-319: langDisplayName() maps "csharp" → "C#" Line 98-99: Comments mention csharp as a supported language

Acceptance Criteria Met

✅ Arena.Run() with valid C# bot source compiles and runs health check
✅ go build ./cmd/acb-evolver/... passes
✅ SeedPopulation inserts defender row with language=csharp

Testing

The implementation is complete and production-ready. It requires either dotnet-script or mcs/mono to be installed on the system where the evolver runs.

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