evrmem

Local Chinese semantic memory search and storage using text2vec embeddings and ChromaDB, supporting RAG-based context augmentation for AI agents.

evrmem Skill

Name

evrmem

Description

Local Chinese Vector Memory System. Provides semantic memory search and storage for AI agents using local Chinese embedding models (text2vec) and ChromaDB. Supports RAG-based context augmentation.

When to Use

Use this skill when the user asks to:

• "Search memories" or "Find related memories"
• "Save this to memory"
• "Remember this information"
• "Search my knowledge base"
• "Find past notes about X"
• "Add this to my memory"
• "What do I know about X"
• "RAG retrieval" or "context augmentation"
• Query or recall previous learnings

Prerequisites

Install evrmem and initialize:

bash

pip install evrmem
evrmem init

For China users (mirror):

bash

set HF_ENDPOINT=https://hf-mirror.com   # Windows
# or
export HF_ENDPOINT=https://hf-mirror.com   # Linux/Mac
evrmem init

Core Workflow

1. Semantic Search (Most Common)

python

from qmd.core.vector_db import vector_db

results = vector_db.search("React form warning", top_k=5)
for r in results:
    print(f"[{r['distance']:.3f}] {r['content'][:80]}")

Or via CLI:

bash

evrmem search "React form warning"
evrmem search "deployment issue" --project myproject

2. Add Memory

python

memory_id = vector_db.add_memory(
    "React StrictMode causes Form.useForm warning",
    metadata={"project": "mes-demo", "tags": "react,antd"}
)

Or via CLI:

bash

evrmem add "Important finding about X" --project myproject --tags react,bug

3. Structured Query

bash

# Query by project
evrmem query --project mes-demo

# Query by tag
evrmem query --tag react

# List all projects
evrmem query --list-projects

# List all tags
evrmem query --list-tags

4. RAG Retrieval

python

result = vector_db.rag("how to fix the form warning", top_k=3)
print(result["context"])

Or via CLI:

bash

evrmem rag "how to fix the form warning"
evrmem rag "how to fix the form warning" --prompt

5. Statistics

bash

evrmem stats

Configuration

Create ~/.evrmem/config.yaml:

yaml

vector_db:
  persist_directory: "~/.evrmem/data/qmd_memory"

embedding:
  model_name: "shibing624/text2vec-base-chinese"
  device: "cpu"  # or "cuda"
  cache_folder: "~/.evrmem/models"

rag:
  top_k: 5
  min_similarity: 0.5

logging:
  level: "WARNING"

Environment Variables

Variable	Description	Default
EVREM_DATA_DIR	Data directory	~/.evrmem/data/qmd_memory
EVREM_MODEL_NAME	HuggingFace model name	shibing624/text2vec-base-chinese
EVREM_LOCAL_MODEL	Local model path (highest priority)	-
EVREM_DEVICE	Device for inference	cpu
EVREM_TOP_K	Default retrieval count	5
EVREM_MIN_SIM	Minimum similarity threshold	0.5
EVREM_LOG_LEVEL	Logging level	WARNING
EVREM_LOCAL_FILES_ONLY	Disable network access	false
HF_ENDPOINT	HuggingFace mirror endpoint	-

Response Format

When reporting search results, use this format:

text

## evrmem Search Results

**Query:** "user query"
**Results:** N memories found

| Score | Project | Content |
|-------|---------|---------|
| 0.723 | mes-demo | React StrictMode causes Form.useForm warning... |
| 0.681 | docs | Deployment script timeout issue... |

### Top Match
**Project:** mes-demo | **Tags:** react,antd

> React StrictMode causes Form.useForm warning...

When adding memory:

text

## Memory Saved

**ID:** abc123
**Project:** mes-demo
**Tags:** react
**Content:** React StrictMode causes Form.useForm warning...

Use `evrmem search "React StrictMode"` to retrieve later.

Installation for Agent

If evrmem is not installed:

python

import subprocess
subprocess.run(["pip", "install", "evrmem"], check=True)
# Initialize on first use (downloads ~400MB model)
subprocess.run(["evrmem", "init"], check=True)

For China users, set mirror before init:

python

import os
os.environ["HF_ENDPOINT"] = "https://hf-mirror.com"
subprocess.run(["evrmem", "init"], check=True)

Edge Cases

• Model download fails: Set HF_ENDPOINT=https://hf-mirror.com before evrmem init
• NumPy errors: Run pip install "numpy<2" --force-reinstall
• Offline/air-gapped: Download model on connected machine, copy ~/.evrmem/models to offline machine, set EVREM_LOCAL_FILES_ONLY=true
• Empty search results: Try broader terms or check if memories exist with evrmem query --list-projects
• Similarity too low: Adjust --top-k or lower EVREM_MIN_SIM threshold
• Slow search: Use CPU by default; set EVREM_DEVICE=cuda if GPU available