ArcKit 6.9.0

Added

• State ask-always/answer-optional in ADM commands and wire in template intake questions

Fixed

• Sync extension parity tests with converter PLUGIN_SOURCES (arckit-oaa)
• Make shipped ADM templates render conforming artefacts (14-field Document Control, canonical revision-history columns, valid mermaid)
• Standardise intake §5 provenance keys and add the artefact-value audit rule
• Mirror community intake-instructions.md into the Claude overlay layout
• Make intake interview ask-always/answer-optional and wire in template intake questions
• Point canonical guide codex-marketplace ref at terrygzhou/arckit-codex
• Sync intake-instructions.md shared asset into all community plugins
• Resolve MD012 multiple-blank-line lint in README and CHANGELOG
• Make GitHub Release creation idempotent
• Fail fast when PYPI_API_TOKEN is missing or invalid in PyPI publish

Changed

• Gitignore .env.* local env files
• Close out intake-authoritative-questions tasks (lint, commit, layout-sync fix)
• Serialize release & PyPI publish with concurrency guards
• Make PyPI upload idempotent via twine --skip-existing