Perseus Vault

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by Perseus-Computing-LLC

Persistent, encrypted memory for AI agents: one Rust binary, one file, no cloud. 122 canonical MCP tools, hybrid recall, bi-temporal history, AES-256-GCM. Local-first, air-gap ready, MIT.

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Tools (40)

perseus_vault_as_of

Transaction-time time-travel: the version of a fact (category + key) that was believed at a past instant.

perseus_vault_ask

RAG: recall context, query LLM, return grounded answer with sources.

perseus_vault_bitemporal

Full 2-axis bi-temporal query: "as of transaction time T, what did we believe was true at valid time V" — the exact rectangle cell.

perseus_vault_capture

Opt-in in-session capture (#520): distill a transcript/insight payload (text, markdown, or JSONL) into durable entities (root-cause / pitfall / decision / pattern / takeaway) the moment a problem is solved. Local rule-based distiller by default, optional llm: true with graceful fallback; near-dup me

perseus_vault_check_failure_pattern

Deja-vu guard: check an action against previously recorded failures (journal + failure/pitfall entities) before retrying it. Read-only.

perseus_vault_communities

GraphRAG community detection over the link graph (deterministic label propagation or greedy-modularity "louvain"; pure Rust, offline).

perseus_vault_community_summary

Extractive (optionally LLM-polished) summary of one community, materialized as an entity with evidencefor links to members.

perseus_vault_context

Pre-formatted markdown block for session injection. Recall-first by default: pass query (the current task/message) and only topically relevant entities are injected, clamped to a per-model budget; the legacy unconditional dump requires mode: "alwaysinject".

perseus_vault_decay

Recalculate Ebbinghaus decay scores (batched 1000-entity transactions).

perseus_vault_embed

Generate dense vectors via the bundled model, Ollama, or OpenAI-compatible endpoint.

perseus_vault_expire

Time-based lifecycle sweep: entities past their body expiresat transition to status='expired' (content retained, dry-run supported).

perseus_vault_extract

Local, deterministic, rule-based knowledge extraction (facts / preferences / temporal events / episodes) from text or a stored entity. Read-only.

perseus_vault_forget

Soft-delete (archived=1).

perseus_vault_get_entity

Fetch one entity by ID with full bodyjson.

perseus_vault_global_recall

GraphRAG global search: breadth over community summaries, then depth into the best communities' members — holistic answers across clusters.

perseus_vault_graph_attest

Stamp the from-side entity id as the evidence anchor on legacy edges so they become serveable by the graph recall arms (#869); dry-run preview, journaled.

perseus_vault_graph_drift

Read-only graph/entities/indexes/receipts drift report (#869): unattested, dangling, archived/expired-target, and cross-workspace edges, stale community memberships, FTS drift, journal refs to missing entities.

perseus_vault_history

List superseded versions of a fact (category + key), newest first — paginated (limit default 20, plus offset); total reports the full trail size (companion to perseusvaultasof).

perseus_vault_hygiene

Read-only startup-memory hygiene report (#675): scores active memories by "actionability" (concrete anchors — issue keys, #refs, paths, URLs, decisions — vs vague/date-only/short) and lists the worst offenders with reasons, for archive/consolidate curation.

perseus_vault_ingest

Trigger connector syncs (GitHub, file watcher).

perseus_vault_ingest_file

Locally extract a document's text (plaintext/markdown always; DOCX/PDF with the multimodal feature) and store it as a recallable entity.

perseus_vault_journal

Append structured event with actor attribution.

perseus_vault_link

Create typed relationship links between entities.

perseus_vault_memories

Anthropic memory-tool compatible file interface (view/create/strreplace/insert/delete/rename under /memories), backed by vault entities.

perseus_vault_prune

Bulk archive by category, decay threshold, or age.

perseus_vault_purge

Permanently delete archived entities + VACUUM. Destructive.

perseus_vault_recall

Search with FTS5/dense/hybrid modes, filters, stemming expansion. Query contract (#562): query="" is match-all enumeration (the "list all" path); "" and other wildcards are literal FTS5 terms, not globs — "" matches nothing.

perseus_vault_recall_layer

Recall from a specific biomimetic layer (world, episodic, semantic).

perseus_vault_recall_when

Proactive just-in-time recall: surface entities whose recallwhen triggers match.

perseus_vault_remember

Store/update entity. Idempotent by (category, key); a content change snapshots the prior version into history.

perseus_vault_scan

Deterministic paginated enumeration of a category or the whole store (#562): immutable id ASC keyset pages with a nextcursor/hasmore contract, so export/sync/reset callers can walk every entity exactly once. Read-only — no retrieval-count/decay side-effects, no offset cap.

perseus_vault_semantic_search

Dense-only semantic search shortcut — find entities by meaning, ranked purely by embedding similarity (no keyword fallback).

perseus_vault_state_delete

Delete state entry.

perseus_vault_state_get

Get state value. Returns null if expired.

perseus_vault_state_list

List state keys, optionally filtered by prefix.

perseus_vault_state_set

Set key-value state with optional TTL.

perseus_vault_timeline

Query journal by time range with filters.

perseus_vault_traverse

Walk entity link graph up to configurable depth.

perseus_vault_unlink

Remove entity links.

perseus_vault_valid_at

Valid-time lookup: the version that was actually true in the world at an instant, per current knowledge (SQL:2011 APPLICATIONTIME).