vestige/CLAUDE.md

Vestige v2.0.1 — Cognitive Memory System

Vestige is your long-term memory. 29 stateful cognitive modules implement real neuroscience: FSRS-6 spaced repetition, synaptic tagging, prediction error gating, hippocampal indexing, spreading activation, reconsolidation, and dual-strength memory theory. Use it automatically. Use it aggressively.

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Session Start Protocol

Every conversation, before responding to the user:

session_context({
  queries: ["user preferences", "[current project] context"],
  context: { codebase: "[project]", topics: ["[current topics]"] },
  token_budget: 2000
})

Then check automationTriggers from response:

• needsDream → call dream (consolidates memories, discovers hidden connections)
• needsBackup → call backup
• needsGc → call gc(dry_run: true) then review
• totalMemories > 700 → call find_duplicates

Say "Remembering..." then retrieve context before answering.

Fallback: If session_context unavailable: search × 2 → intention check → system_status → predict.

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Complete Tool Reference (21 Tools)

session_context — One-Call Initialization

session_context({
  queries: ["user preferences", "project context"],  // search queries
  context: { codebase: "project-name", topics: ["svelte", "rust"], file: "src/main.rs" },
  token_budget: 2000,        // 100-10000, controls response size
  include_status: true,       // system health
  include_intentions: true,   // triggered reminders
  include_predictions: true   // proactive memory predictions
})

Returns: markdown context + automationTriggers + expandable IDs for on-demand retrieval.

smart_ingest — Save Anything

Single mode — auto-decides CREATE/UPDATE/SUPERSEDE via Prediction Error Gating:

smart_ingest({
  content: "What to remember",
  tags: ["tag1", "tag2"],
  node_type: "fact",          // fact|concept|event|person|place|note|pattern|decision
  source: "optional reference",
  forceCreate: false          // bypass dedup when needed
})

Batch mode — save up to 20 items in one call (session end, pre-compaction):

smart_ingest({
  items: [
    { content: "Item 1", tags: ["session-end"], node_type: "fact" },
    { content: "Item 2", tags: ["bug-fix"], node_type: "fact" }
  ]
})

Each item runs the full cognitive pipeline: importance scoring → intent detection → synaptic tagging → hippocampal indexing → PE gating → cross-project recording.

search — 7-Stage Cognitive Search

search({
  query: "search query",
  limit: 10,                  // 1-100
  min_retention: 0.0,         // filter by retention strength
  min_similarity: 0.5,        // minimum cosine similarity
  detail_level: "summary",    // brief|summary|full
  context_topics: ["rust", "debugging"],  // boost topic-matching memories
  token_budget: 3000          // 100-10000, truncate to fit
})

Pipeline: Overfetch (3x, BM25+semantic) → Rerank (cross-encoder) → Temporal boost → Accessibility filter (FSRS-6) → Context match (Tulving 1973) → Competition (Anderson 1994) → Spreading activation. Every search strengthens the memories it finds (Testing Effect).

memory — Read, Edit, Delete, Promote, Demote

memory({ action: "get", id: "uuid" })           // full node with all FSRS state
memory({ action: "edit", id: "uuid", content: "updated text" })  // preserves FSRS state, regenerates embedding
memory({ action: "delete", id: "uuid" })
memory({ action: "promote", id: "uuid", reason: "was helpful" })  // +0.20 retrieval, +0.10 retention, 1.5x stability
memory({ action: "demote", id: "uuid", reason: "was wrong" })     // -0.30 retrieval, -0.15 retention, 0.5x stability
memory({ action: "state", id: "uuid" })          // Active/Dormant/Silent/Unavailable + accessibility score

Promote/demote does NOT delete — it adjusts ranking. Demoted memories rank lower; alternatives surface instead.

codebase — Code Patterns & Architectural Decisions

codebase({ action: "remember_pattern", name: "Pattern Name",
  description: "How it works and when to use it",
  files: ["src/file.rs"], codebase: "project-name" })

codebase({ action: "remember_decision", decision: "What was decided",
  rationale: "Why", alternatives: ["Option A", "Option B"],
  files: ["src/file.rs"], codebase: "project-name" })

codebase({ action: "get_context", codebase: "project-name", limit: 10 })
// Returns: patterns, decisions, cross-project insights

intention — Prospective Memory (Reminders)

intention({ action: "set", description: "What to do",
  trigger: { type: "context", topic: "authentication" },  // fires when discussing auth
  priority: "high" })

intention({ action: "set", description: "Deploy by Friday",
  trigger: { type: "time", at: "2026-03-07T17:00:00Z" },
  deadline: "2026-03-07T17:00:00Z" })

intention({ action: "set", description: "Check test coverage",
  trigger: { type: "context", codebase: "vestige", file_pattern: "*.test.*" } })

intention({ action: "check", context: { codebase: "vestige", topics: ["testing"] } })
intention({ action: "update", id: "uuid", status: "complete" })
intention({ action: "list", filter_status: "active" })

dream — Memory Consolidation

dream({ memory_count: 50 })

5-stage cycle: Replay → Cross-reference → Strengthen → Prune → Transfer. Uses Waking SWR tagging (70% tagged + 30% random for diversity). Discovers hidden connections, generates insights, persists new edges to the activation network.

explore_connections — Graph Traversal

explore_connections({ action: "associations", from: "uuid", limit: 10 })
// Spreading activation from a memory — find related memories via graph traversal

explore_connections({ action: "chain", from: "uuid-A", to: "uuid-B" })
// Build reasoning path between two memories (A*-like pathfinding)

explore_connections({ action: "bridges", from: "uuid-A", to: "uuid-B" })
// Find connecting memories that bridge two concepts

predict — Proactive Retrieval

predict({ context: { codebase: "vestige", current_file: "src/main.rs",
  current_topics: ["error handling", "rust"] } })

Returns: predictions with confidence, suggestions, speculative retrievals, top interests. Uses SpeculativeRetriever's learned patterns from access history.

importance_score — Should I Save This?

importance_score({ content: "Content to evaluate",
  context_topics: ["debugging"], project: "vestige" })

4-channel model: novelty (0.25), arousal (0.30), reward (0.25), attention (0.20). Composite > 0.6 = save it.

find_duplicates — Dedup Memory

find_duplicates({ similarity_threshold: 0.80, limit: 20, tags: ["bug-fix"] })

Cosine similarity clustering. Returns merge/review suggestions.

memory_timeline — Chronological Browse

memory_timeline({ start: "2026-02-01", end: "2026-03-01",
  node_type: "decision", tags: ["vestige"], limit: 50, detail_level: "summary" })

memory_changelog — Audit Trail

memory_changelog({ memory_id: "uuid", limit: 20 })       // per-memory history
memory_changelog({ start: "2026-03-01", limit: 20 })      // system-wide

memory_health — Retention Dashboard

memory_health()

Returns: avg retention, distribution buckets (0-20%, 20-40%, etc.), trend (improving/declining/stable), recommendation.

memory_graph — Visualization Export

memory_graph({ query: "search term", depth: 2, max_nodes: 50 })
memory_graph({ center_id: "uuid", depth: 3, max_nodes: 100 })

Returns nodes with force-directed positions + edges with weights.

Maintenance Tools

system_status()                              // health + stats + warnings + recommendations
consolidate()                                // FSRS-6 decay cycle + embedding generation
backup()                                     // SQLite backup → ~/.vestige/backups/
export({ format: "json", tags: ["bug-fix"], since: "2026-01-01" })
gc({ min_retention: 0.1, dry_run: true })    // garbage collect (dry_run first!)
restore({ path: "/path/to/backup.json" })

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Mandatory Save Gates

You MUST NOT proceed past a save gate without executing the save.

Gate	Trigger	Action
BUG_FIX	After any error is resolved	smart_ingest({ content: "BUG FIX: [error]\nRoot cause: [why]\nSolution: [fix]\nFiles: [paths]", tags: ["bug-fix", "project"], node_type: "fact" })
DECISION	After any architectural/design choice	codebase({ action: "remember_decision", decision, rationale, alternatives, files, codebase })
CODE_CHANGE	After >20 lines or new pattern	codebase({ action: "remember_pattern", name, description, files, codebase })
SESSION_END	Before stopping or compaction	smart_ingest({ items: [{ content: "SESSION: [summary]", tags: ["session-end"] }] })

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Trigger Words — Auto-Save

User Says	Action
"Remember this" / "Don't forget"	smart_ingest immediately
"I always..." / "I never..." / "I prefer..."	Save as preference
"This is important"	smart_ingest + memory(action="promote")
"Remind me..." / "Next time..."	intention({ action: "set" })

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Cognitive Architecture

Search Pipeline (7 stages)

1. Overfetch — 3x results from hybrid search (0.3 BM25 + 0.7 semantic, nomic-embed-text-v1.5 768D)
2. Rerank — Cross-encoder rescoring (Jina Reranker v1 Turbo, 38M params)
3. Temporal — Recency + validity window boosting (85% relevance + 15% temporal)
4. Accessibility — FSRS-6 retention filter (Active ≥0.7, Dormant ≥0.4, Silent ≥0.1)
5. Context — Tulving 1973 encoding specificity (topic overlap → +30% boost)
6. Competition — Anderson 1994 retrieval-induced forgetting (winners strengthen, competitors weaken)
7. Activation — Spreading activation side effects + predictive model + reconsolidation marking

Ingest Pipeline

Pre: 4-channel importance scoring (novelty/arousal/reward/attention) + intent detection → auto-tag Store: Prediction Error Gating: similarity >0.92 → UPDATE, 0.75-0.92 → UPDATE/SUPERSEDE, <0.75 → CREATE Post: Synaptic tagging (Frey & Morris 1997, 9h backward + 2h forward) + hippocampal indexing + cross-project recording

FSRS-6 (State-of-the-Art Spaced Repetition)

• Retrievability: R = (1 + factor × t / S)^(-w20) — 21 trained parameters
• Dual-strength model (Bjork & Bjork 1992): storage strength (grows) + retrieval strength (decays)
• Accessibility = retention×0.5 + retrieval×0.3 + storage×0.2
• 20-30% more efficient than SM-2 (Anki)

29 Cognitive Modules (stateful, persist across calls)

Neuroscience (16): ActivationNetwork (Collins & Loftus 1975), SynapticTaggingSystem (Frey & Morris 1997), HippocampalIndex (Teyler & Rudy 2007), ContextMatcher (Tulving 1973), AccessibilityCalculator, CompetitionManager (Anderson 1994), StateUpdateService, ImportanceSignals, NoveltySignal, ArousalSignal, RewardSignal, AttentionSignal, EmotionalMemory (Brown & Kulik 1977), PredictiveMemory, ProspectiveMemory, IntentionParser

Advanced (11): ImportanceTracker, ReconsolidationManager (Nader — 5min labile window), IntentDetector (9 intent types), ActivityTracker, MemoryDreamer (5-stage consolidation), MemoryChainBuilder (A*-like), MemoryCompressor (30-day min age), CrossProjectLearner (6 pattern types), AdaptiveEmbedder, SpeculativeRetriever (6 trigger types), ConsolidationScheduler

Search (2): Reranker, TemporalSearcher

Memory States

• Active (retention ≥ 0.7) — easily retrievable
• Dormant (≥ 0.4) — retrievable with effort
• Silent (≥ 0.1) — difficult, needs cues
• Unavailable (< 0.1) — needs reinforcement

Connection Types

semantic, temporal, causal, spatial, part_of, user_defined — each with strength (0-1), activation_count, timestamps

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Advanced Techniques

Cross-Project Intelligence

The CrossProjectLearner tracks patterns across ALL projects (ErrorHandling, AsyncConcurrency, Testing, Architecture, Performance, Security). When you learn a pattern in one project that works, it becomes available in all projects. Use codebase({ action: "get_context" }) without a codebase filter to get universal patterns.

Reconsolidation Window

After any memory is accessed (via search, get, or promote), it enters a 5-minute "labile" state where modifications are enhanced. This is the optimal time to edit memories with new context. The system handles this automatically.

Synaptic Tagging (Retroactive Importance)

Memories encoded in the last 9 hours can be retroactively promoted when something important happens. If you fix a critical bug, not only does the fix get saved — related memories from the past 9 hours also get importance boosts. The SynapticTaggingSystem handles this automatically.

Dream Insights

Dreams don't just consolidate — they generate new insights by cross-referencing recent memories with older knowledge. The insights can reveal: contradictions between memories, previously unseen patterns, connections across different projects. Always check dream results for insights_generated.

Token Budget Strategy

Use token_budget on search and session_context to control response size. For quick lookups: 500. For deep context: 3000-5000. Results that don't fit go to expandable — retrieve them with memory({ action: "get", id: "..." }).

Detail Levels

• brief — id/type/tags/score only (1-2 tokens per result, good for scanning)
• summary — 8 fields including content preview (default, balanced)
• full — all FSRS state, timestamps, embedding info (for debugging/analysis)

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Memory Hygiene

Promote when user confirms helpful, solution worked, info was accurate. Demote when user corrects mistake, info was wrong, led to bad outcome. Never save: secrets, API keys, passwords, temporary debugging state, trivial info.

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The One Rule

When in doubt, save. The cost of a duplicate is near zero (Prediction Error Gating handles dedup). The cost of lost knowledge is permanent.

Memory is retrieval. Searching strengthens memory. Search liberally, save aggressively.

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Development

• Crate: vestige-mcp v2.0.1, Rust 2024 edition, MSRV 1.91
• Tests: 1,238 (352 unit + 192 E2E + cognitive + journey + extreme), zero warnings
• Build: cargo build --release -p vestige-mcp (features: embeddings + vector-search)
• Build (no embeddings): cargo build --release -p vestige-mcp --no-default-features
• Bench: cargo bench -p vestige-core
• Architecture: McpServer → Arc<Storage> + Arc<Mutex<CognitiveEngine>>
• Storage: SQLite WAL mode, Mutex<Connection> reader/writer split, FTS5 full-text search
• Embeddings: nomic-embed-text-v1.5 (768D, 8K context) via fastembed (local ONNX, no API)
• Vector index: USearch HNSW (20x faster than FAISS)
• Binaries: vestige-mcp (MCP server), vestige (CLI), vestige-restore
• Dashboard: SvelteKit 2 + Svelte 5 + Three.js + Tailwind 4, embedded at /dashboard
• Env vars: VESTIGE_DASHBOARD_PORT (default 3927), VESTIGE_CONSOLIDATION_INTERVAL_HOURS (default 6), RUST_LOG