Cognee:Recall

/cognee-recall — Search & Recall from Knowledge Graph

Semantic, graph-traversal, and lexical search across Cognee's knowledge graph. Finds entities, decisions, events, and their relationships — then injects relevant results as agent context for informed decision-making.

Quick Reference

bashCopy code
COGNEE="${COGNEE_BASE_URL:-http://localhost:8000}"
DATASET="my-project"

# Semantic search (auto-selects best strategy)
curl -s -X POST "$COGNEE/api/v1/search" \
  -H "Content-Type: application/json" \
  -d '{"query": "authentication decisions", "datasets": ["my-project"], "search_type": "FEELING_LUCKY", "top_k": 10}' | jq .

# Graph completion search (relationship-aware)
curl -s -X POST "$COGNEE/api/v1/search" \
  -H "Content-Type: application/json" \
  -d '{"query": "who reports to Alice", "datasets": ["my-project"], "search_type": "GRAPH_COMPLETION", "top_k": 10}' | jq .

# Recall with context injection (adds system prompt)
curl -s -X POST "$COGNEE/api/v1/recall" \
  -H "Content-Type: application/json" \
  -d '{"query": "rate limiting", "datasets": ["my-project"], "top_k": 10, "only_context": true}' | jq .

# Cross-project search
curl -s -X POST "$COGNEE/api/v1/search" \
  -H "Content-Type: application/json" \
  -d '{"query": "auth decisions", "datasets": ["project-a", "project-b", "project-c"], "search_type": "FEELING_LUCKY"}' | jq .

Search Types

Cognee supports multiple search strategies. Use FEELING_LUCKY for auto-selection (recommended), or specify one:

Sub-commands

/cognee-recall search — Run a semantic/graph search

Procedure:

1. Ask the user what they're looking for (or use the provided query).
2. Determine the best search type based on the query:
   • Queries about relationships → GRAPH_COMPLETION
   • General "what do we know" → FEELING_LUCKY
   • Time-based ("last week", "in Q2") → TEMPORAL if available
   • Code-related → CODING_RULES
3. Detect which datasets to search:
   • Default: current project dataset
   • If user mentions another project: include its dataset
   • Use /cognee status to list available datasets
4. Execute search:

bashCopy code
COGNEE="${COGNEE_BASE_URL:-http://localhost:8000}"

curl -s -X POST "$COGNEE/api/v1/search" \
  -H "Content-Type: application/json" \
  -d "{
    \"query\": \"$QUERY\",
    \"datasets\": $DATASETS_JSON,
    \"search_type\": \"$SEARCH_TYPE\",
    \"top_k\": $TOP_K
  }" | jq .

5. Present results:

Copy code
COGNEE RECALL — "$QUERY"
==================================================
Found N results across M datasets

[1] DECISION: Use JWT for API auth (2026-06-30)
    Context: Stateless, works with existing infra
    Dataset: my-project | Score: 0.94

[2] ENTITY: Auth Service — depends_on → PlatformHub
    Description: Authentication and authorization service
    Dataset: my-project | Score: 0.87

[3] TASK: Set up JWT middleware (open, priority 1)
    Assigned to: Alice Chen
    Dataset: my-project | Score: 0.82

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

/cognee-recall context — Inject results as agent context

Same as search, but formats results for direct injection into the agent's context window. Use this before making architectural decisions or when context from past sessions is needed.

Procedure:

1. Run search as above.
2. Format results as a compact context block:

Copy code
[COGNEE CONTEXT INJECTION — {timestamp}]
Query: "{original_query}"
Dataset(s): {dataset_names}

Relevant knowledge:
• DECISION ({date}): {text} — {context} [relevance: {score}]
• ENTITY: {name} ({type}) — {description} [relevance: {score}]
• TASK: {text} ({status}) — assigned to {assignee} [relevance: {score}]
• EVENT: {title} ({date}, {type}) — {summary} [relevance: {score}]

Use this context to inform your response. Cite specific decisions and entities where relevant.

3. The agent then uses this context transparently in its reasoning.

/cognee-recall graph — Explore entity neighborhood

Explore the graph around a specific entity to understand its relationships.

bashCopy code
COGNEE="${COGNEE_BASE_URL:-http://localhost:8000}"

# First, get the dataset ID
DATASET_ID=$(curl -s "$COGNEE/api/v1/datasets" | jq -r '.[] | select(.name=="my-project") | .id')

# Get the full graph
curl -s "$COGNEE/api/v1/datasets/$DATASET_ID/graph" | jq .

Present as a relationship map:

Copy code
ENTITY GRAPH — "Auth Service" (my-project)
==================================================
                      ┌──────────────────┐
                      │   Auth Service   │
                      │   (system)       │
                      └───┬──────────┬───┘
                          │          │
              depends_on  │          │ owns
                          │          │
                   ┌──────▼──┐  ┌───▼──────────┐
                   │Platform │  │ JWT Middleware│
                   │Hub      │  │ (module)      │
                   │(module) │  └───────────────┘
                   └─────────┘

Related decisions:
  • Use JWT for API auth (2026-06-30) — relates to Auth Service

Related tasks:
  • Set up JWT middleware (open) — assigned to Alice Chen
  • Update API docs (open) — assigned to unassigned

/cognee-recall cross-project — Search across multiple projects

Search for related knowledge across all available datasets.

bashCopy code
COGNEE="${COGNEE_BASE_URL:-http://localhost:8000}"

# Get all dataset names
DATASETS=$(curl -s "$COGNEE/api/v1/datasets" | jq -r '[.[].name] | join(",")')

# Cross-project search
curl -s -X POST "$COGNEE/api/v1/search" \
  -H "Content-Type: application/json" \
  -d "{
    \"query\": \"$QUERY\",
    \"datasets\": [$DATASETS_JSON],
    \"search_type\": \"FEELING_LUCKY\",
    \"top_k\": 15
  }" | jq .

Present results grouped by dataset:

Copy code
CROSS-PROJECT RECALL — "$QUERY"
==================================================
Found N results across M datasets

my-project (5 results):
  [1] DECISION: Use JWT for API auth — 0.94
  [2] ENTITY: Auth Service — 0.87
  ...

e-and-c (3 results):
  [1] DECISION: Stakeholder role for external users — 0.91
  [2] ENTITY: External Review System — 0.84
  ...

optimize (2 results):
  [1] DECISION: Migration to pgvector — 0.78
  ...

Behavior Rules

Proactive recall triggers

Automatically run /cognee-recall search when:

• User asks "what do we know about X" or "what did we decide about Y"
• User starts a new task that references past work ("continue working on auth")
• User makes a decision that might conflict with past decisions
• Before architectural or design discussions that would benefit from context

Relevance threshold

Only show results with relevance score > 0.5 by default. If fewer than 3 results exceed threshold, tell the user: "Only {N} low-relevance results found. Try a broader query."

Context injection discipline

• Inject context before reasoning about a decision, not after.
• Cite specific decisions/entities from the graph in responses: "Based on the June 30 decision to use JWT for API auth [Cognee]..."
• Never fabricate — if the graph has no relevant data, say so.

Session-aware recall

If Cognee supports sessions, tag recalls with a session ID for better multi-turn context:

bashCopy code
SESSION_ID="coco-$(date +%s)"

curl -s -X POST "$COGNEE/api/v1/search" \
  -H "Content-Type: application/json" \
  -d "{
    \"query\": \"$QUERY\",
    \"datasets\": [\"$DATASET\"],
    \"search_type\": \"FEELING_LUCKY\",
    \"top_k\": 10
  }" | jq .

Fallback Behavior

If Cognee is unreachable:

1. Check if Brain is available: look for project_brain.db in current or parent directories
2. If available: "Cognee is not running. Using Brain for this query instead." Run equivalent /brain context --search "query"
3. If neither available: "No memory backend available. Start Cognee with cognee server start or initialize Brain with /brain init."

Prerequisites

Cognee must be running and the project dataset must exist (created via /cognee init).

bashCopy code
# Verify
curl http://localhost:8000/health
curl http://localhost:8000/api/v1/datasets | jq '.[].name'