tsift-memory

First-party memory substrate for tsift and agent-doc.

This crate owns the stable memory schema, budgeted capture contracts, graph projection primitives, and migration importers. It treats external memory tools such as claude-mem as import sources instead of durable runtime dependencies.

Current surfaces:

• MemoryStore initializes .tsift/memory.db with schema version 1.
• plan_capture_handoff estimates tokens before model calls and reports split/defer decisions.
• guard_memory_handoff fails closed on oversized raw payloads and emits digest/context replacements plus retryable chunk commands.
• project_memory_events maps memory events into provider-neutral graph nodes/edges.
• inspect_claude_mem and read_claude_mem_events inspect the observed claude-mem SQLite schema without writing to it.
• import_claude_mem optionally migrates those events into the tsift memory DB; uncapped imports report per-table source/read/import reconciliation and capped event-id samples so operators can prove all supported rows were covered without oversized JSON.
• Graph-db refresh can project matching claude-mem observations, session summaries, user prompts, and adjacent Chroma handles as read-only semantic/session/source rows without taking over capture ownership.