v0.5.9

Added

• MCP tool annotations (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) on all 19 tools for machine-readable safety classification
• Usage/non-usage conditions in tool descriptions (e.g., "Use this to...", "Do not use for...")

Changed

• Breaking: memory_note_new now returns JSON {"path", "title", "date"} instead of a plain path string
• Breaking: memory_search removes 6 parameters: prf, no_prf, rerank, compact, explain, no_feedback_expand — use mode presets instead. no_rerank is retained for disabling auto-enabled reranking
• Breaking: memory_search_global removes 3 parameters: compact, explain, no_feedback_expand — use mode presets instead
• engine parameter in memory_search now uses Literal["auto", "index", "hybrid", "rg", "python"] enum constraint
• fmt parameter in memory_export now uses Literal["json", "zip"] enum constraint
• lang parameter in memory_note_new now uses Literal["ja", "en"] enum constraint
• Compact mode (mode="quick") now strips settings echo-back fields (expand_enabled, feedback_expand, top, snippets, rerank_enabled, rerank_auto_enabled, compact) from search results
• Compact mode now omits empty detail dict from result tuples (2-element [score, entry] instead of 3-element [score, entry, {}])