INVARIANT 0.3.0 — packaged beta

INVARIANT 0.3.0 is the first packaged beta release of the local coding-agent comparison workflow.

Run the same task in isolated Linux workspaces, evaluate results with frozen checks, compare them, then continue or review and apply a selected result.

• Public Rust core and broker libraries with documented APIs and standalone consumer verification.
• Complete Python sdist/wheel, guided onboarding and installable Python/JavaScript examples.
• Dependency preparation without model turns, baseline preflight, Markdown/JSON/CSV reports.
• Storage retention, private image/state backups, recoverable same-path restore and sanitized diagnostics.
• Existing recipe, selection, retry, apply, workspace and broker behavior retained.

See the README, changelog and verification record.

Install the attached wheel in a host virtual environment, or use the versioned Git installation in the README. Verify attached files with SHA256SUMS. Rust archives remain version 0.1.0; their unpublished core dependency needs the documented local patch, or consume both crates directly from Git.

This beta supports macOS/Linux. Native Codex uses host ChatGPT sign-in and real account allowance. Backups are private, unencrypted, same-path archives. Hard disk quotas, automatic merges, deterministic model responses, PyPI publication and public image publication are outside this release.

Verified on matching macOS/Linux source: all 21 acceptance requirements and 22 release stages, 271 application and 11 SDK unit tests, 40-trial command matrices, and 15 real Codex turns. Python 3.11–3.15 and Rust 1.90/stable CI matrices passed. Full evidence stays private locally; the attached summary and source manifest identify the verified source.

The exact README Git installation from v0.3.0 was also verified in a fresh virtual environment outside the checkout; installed imports, packaged examples and diagnostics passed.