v0.4.0

RealDiff 0.4.0

RealDiff 0.4.0 is the breaking product rename and adds Python 3.12+ as the sixth traced language.

Highlights

• The repository, projects, namespaces, package IDs, command, environment variables, schemas, action, container, and artifacts are now RealDiff/realdiff/REALDIFF. This release intentionally carries no BehaviorDiff compatibility aliases.
• Python 3.12+ attaches through PEP 669 sys.monitoring at process start. There is no target build, bytecode weaving, AST rewriting, compiler coupling, or sys.settrace fallback.
• pytest and unittest test extents derive from structural roots. Generators, coroutines, and async generators retain one logical call across suspension and emit only at final completion or escaping unwind.
• The fields-only Python canonicalizer avoids properties, descriptors, user attribute hooks, iterators, formatting, equality, and hashing. Unsafe regions are counted partial markers; redaction occurs after real-value hashing.
• Python source members are inventoried by a side-effect-free AST pass because a no-build tracer still must reconcile unexecuted coverage. Runtime events remain exclusively sys.monitoring-owned.
• The maintained Python gate reports 378 matched keys across 73 subject methods and 384 events per run, with six pytest roots, six equivalent unittest roots, zero clean divergences, and a verified base-trace cache hit.
• RealDiff.Tool.0.4.0 packages all six tracers. The installed-package proof records four Python runs and 1,536 Python events in addition to the existing Java, Node, Go, and Rust proofs.

The all-language container includes Python 3.12 and pytest. The local six-language image proof verifies every staged Python tracer file and the realdiff executable.

Full Changelog: v0.3.0...v0.4.0

v0.3.0

BehaviorDiff 0.3.0

BehaviorDiff 0.3.0 completes the distribution and confidentiality work around the Rust architecture.

Highlights

• The retired C# diff engine is no longer shipped or selectable. Matching, noise filtering, frontier analysis, baseline policy, and findings generation run through the single-pass streaming Rust engine.
• The public behaviordiff executable is now a thin Rust launcher. It owns argument routing, .behaviordiff/config.yml loading, language detection, and managed-process spawning; risky repository orchestration remains in the self-contained managed component.
• Self-contained archives are published for linux-x64, linux-arm64, darwin-x64, darwin-arm64, and win-x64, each with a sidecar checksum and aggregate SHA256SUMS. A .NET runtime is not required to run the CLI.
• The Rust tracer now applies the same rendering confidentiality contract as the other tracers: sensitive-name and credential-shape redaction plus configured type/path opt-outs. SHA-256 digests still cover the complete real value, so a secret rotation remains detectable while comments and traces show <redacted>.

The release workflow executes all five native archives and then downloads the Linux artifact into a clean Ubuntu image with no .NET runtime. Node and Go analyses must both reach rendered GitHub comments before the release is published.

Full Changelog: v0.2.0...v0.3.0

v0.2.0

Full Changelog: v0.1.0...v0.2.0

BehaviorDiff v0.1.0

BehaviorDiff v0.1.0 is the initial open-source preview.

Highlights:

• Build-time Mono.Cecil tracing for .NET 8 xUnit repositories
• Three-run nondeterminism baseline and behavior-frontier analysis
• Canonical findings.json with coverage and assertion reaction
• GitHub Actions and Azure Pipelines PR integrations
• Idempotent summaries and cause-hunk comments
• Optional citation-grounded Anthropic explanations
• Stable-sort, retry-policy, and configuration-parser demos

Install the attached tool package:

dotnet tool install --global BehaviorDiff.Tool `
  --add-source <download-directory> `
  --version 0.1.0

See the README for the five-minute demo and CI setup.