v1.5.0

Added

• New openspec/.plus/config.yaml — optional, project-level settings file, separate from openspec/config.yaml, installed/merged automatically by the install/update prompt.
• settings.questionMode: batch — openspec-plus-proposal/-design/-spec/-tasks group each phase's discovery questions into as few question-tool rounds as possible instead of one at a time. Same real answers, no assumptions — fewer round trips for per-prompt-priced model providers, especially premium/high-tier models where round trips are expensive. Config-only, no conversational trigger.
• settings.autoUpdateCheck: false — lets openspec-plus-proposal skip its weekly network version check + upgrade question entirely.
• settings.apply.executionMode / settings.apply.parallelism — let openspec-plus-apply skip its Subagent-vs-Inline and parallel-dispatch questions when set.