titi

tracked with wai

titi is a CLI tool that orchestrates .NET monorepos by swapping PackageReference ↔ ProjectReference, generating transient solutions, and computing test-impact analysis from git diff + coverage data.

Small Mono Repo tool for C# Projects.

Status

The tracer bullet (titi open <package-id>) and the testaruda adapter (Phase 1 + Phase 2 method-level granularity) are implemented and working. 219+ tests pass. Core test-impact-analysis primitives (test-item detection, edges, selection, safety model) are built.

Remaining work: cascading version bumps (ApiCompat-based), production hardening.

Core Capabilities

Capability Command Status Description
Reference swapping titi open ✅ Implemented Toggle PackageReference ↔ ProjectReference via MSBuild conditional logic
Dynamic solution generation .slnx output ✅ Implemented Transient .slnx files for a specific project's dependency closure
Test Impact Analysis titi affected ✅ Implemented Compute affected set from git diff + dependency graph
Test-item detection titi tests list ✅ Implemented Enumerate test methods via VSTest --list-tests
Coverage-to-edge mapping titi tests ingest ✅ Implemented Cobertura XML → test-to-source dependency edges
Test selection titi affected output ✅ Implemented Always-run set, confidence scoring, fallback logic
testaruda adapter titi testaruda-adapter ✅ Implemented JSON-over-stdio adapter for testaruda integration
Interactive REPL titi repl ✅ Implemented Explore the dependency graph interactively
Cascading version bumps — 🔄 Planned ApiCompat-based version increment detection

Getting Started

just build      # Build the CLI
just test       # Run 219+ tests (excludes slow synthetic-fixture builds)
just smoke      # Run titi clean → open → affected against the sample-monorepo fixture

just smoke runs end-to-end against test/fixtures/sample-monorepo/. It generates a .slnx, reports affected projects, and cleans up — no prior setup required.

Documentation