v1.0.0 — Codex-native plan-first Pact

Breaking change

• pact run and pact daemon are plan-first by default. Existing automation that expects Pact-managed implementation must add --implement.

Highlights

• Native Codex assessment, implementation, integration, structured-output, and shared-session support while preserving Claude Code workflows.
• New pact review gate combining Advocate implementation review with Pact-packaged Simulacrum claim review.
• Pact now ships the MIT-licensed Simulacrum runtime and annotated corpus; pact-sim provides direct access without user-specific home-directory state.
• Cross-agent pact-engineer and simulacrum skills plus Claude plugin metadata.
• Contract reconciliation, clearer coding-agent setup failures, quoted tmux launch boundaries, and collision-resistant project session IDs.
• README, capabilities, Claude guidance, and GitHub Pages documentation updated for v1.

Verification

• 2,194 tests passed; 2 expected skips.
• Ruff static-error checks and both skill package validations passed.
• Clean-room wheel and sdist build/install verified with pact, pact review, packaged Sim corpus, and pact-sim.
• Live Codex structured-output and packaged Sim review smoke tests passed.