v0.6.0

Added

• First-party feature_delivery workflow for scoped behavior changes, focused
  discovery, readiness review, implementation, reconciliation, and safe resume.
• Shared native delivery contract and versioned plan asset linking requirements,
  acceptance criteria, task ownership, dependencies, and current evidence.
• Read-only Python 3.12+ validator for strict schema/coverage checks, actual file
  outcomes, artifact/input hashes, red-drill proof, and checkpoint freshness.
  Recorded commands remain inert data; semantic review and real tests remain
  required independently of structural success.
• Atomic plan-update helper with candidate validation, observed-digest conflict
  detection, cooperative locks, flushed writes, and idempotent replacement.
• Executable Python entry points on POSIX, verified by the hosted lint gate.
• Deterministic regressions and validator mutation drills, plus isolated live
  agent scenarios with independent product oracles and negative controls.
• Independent trial checks re-observe runtime versions and validate current
  closure receipts, including a negative control for fabricated versions.

Changed

• Connected setup and retrofit to the shared delivery lifecycle without replacing
  their canonical discovery, code-quality, or red-drill procedures.
• Extended package checks to inspect every committed resource in both archives.
  Added Python 3.12/3.14 validation, strict typing, lint, and tests across Windows,
  Linux, and macOS using the existing CI/release pipeline.
• Reworked README navigation, workflow routing, installation, and documentation
  around a warm ivory, charcoal, and copper visual identity.
• Updated agent adapters, manifests, installation guidance, and contributor docs
  for all three workflows. Delivery code uses only Python's standard library;
  no third-party workflow integration or copied framework code was added.

Verification

• 46 deterministic tests, including validator mutation drills and independent
  outcome-oracle controls; strict typing and linting; twelve hosted matrix jobs.
• 24 independently reviewed live core trials and one unchanged-plan trial.
  Evaluation scope and model/runtime limits are recorded in docs/QUALITY-REVIEW.md.
• Desktop/mobile and light/dark README rendering, plus the saved neutral GitHub
  social-preview image, checked visually.