email-insights/
├── data/
│   └── emails.csv              # Raw email data (id, from, subject, body, date)
├── database/
│   └── signals.db              # SQLite database (created after running ingestion)
├── db/
│   ├── connection.py           # Single source of truth for SQLite connections
│   ├── schema.py               # DDL for all tables (idempotent CREATE IF NOT EXISTS)
│   ├── signals.py              # Read/write for signals table
│   ├── raw_emails.py           # Read/write for raw_emails table
│   └── jobs.py                 # Read/write for jobs and failed_extractions tables
├── ingestion/
│   ├── fetch_emails_imap.py    # Fetch emails via IMAP → store raw in SQLite
│   ├── parse_csv.py            # Step 1: Load emails from CSV
│   ├── extract_signals.py      # Step 2: Call local LLM to extract signals
│   └── store_signals.py        # Step 3: Write signals to SQLite (run this)
├── logs/
│   └── worker.log              # Rotating log file (auto-created, 5 MB max, 3 backups)
├── mcp_server/
│   ├── server.py               # MCP server: registers tools and starts listening
│   └── tools.py                # SQLite query functions + job scheduling tools
├── utils/
│   └── logger.py               # Shared structured logger (stderr + rotating file)
├── worker/
│   └── job_runner.py           # Background worker: polls SQLite and runs extraction jobs
├── requirements.txt
└── README.md

pip install -r requirements.txt

IMAP_HOST=imap.gmail.com
IMAP_USER=you@gmail.com
IMAP_PASSWORD=your-app-specific-password
IMAP_PORT=993          # optional, default 993
IMAP_MAILBOX=INBOX     # optional, default INBOX

python ingestion/fetch_emails_imap.py

# Fetch only the 50 most recent emails
python ingestion/fetch_emails_imap.py --limit 50

# Also export a CSV backup
python ingestion/fetch_emails_imap.py --output data/backup.csv

# Count emails in a date range (no fetch)
python ingestion/fetch_emails_imap.py --count --start-date 2025-01-01 --end-date 2025-03-01

python ingestion/store_signals.py

python worker/job_runner.py

{
  "mcpServers": {
    "email-insights": {
      "command": "python",
      "args": ["/absolute/path/to/email-insights/mcp_server/server.py"]
    }
  }
}

Claude Desktop ──stdio──▶ mcp_server/server.py
                                  │
                          mcp_server/tools.py
                                  │
                           SQLite signals.db
                                  │
                        worker/job_runner.py  ◀── runs separately
                                  │
                          LM Studio (local LLM)

CREATE TABLE raw_emails (
    id           INTEGER PRIMARY KEY AUTOINCREMENT,
    email_id     TEXT    UNIQUE,    -- SHA-256(date|sender_name|sender_email)[:16]
    date         TEXT,              -- ISO format from email Date header
    sender_name  TEXT,
    sender_email TEXT,
    subject      TEXT,
    body         TEXT,
    fetched_at   TEXT DEFAULT (datetime('now'))
);

CREATE TABLE signals (
    id              INTEGER PRIMARY KEY AUTOINCREMENT,
    email_id        TEXT    UNIQUE,
    topic           TEXT,       -- job application | recruiter outreach | rejection | interview | networking | other
    tone            TEXT,       -- positive | neutral | negative
    sender_type     TEXT,       -- recruiter | company HR | networking contact | university | other
    urgency         TEXT,       -- high | medium | low
    requires_action INTEGER,    -- 0 or 1
    date            TEXT        -- ISO format: YYYY-MM-DD
);

CREATE TABLE jobs (
    job_id           INTEGER PRIMARY KEY AUTOINCREMENT,
    schema_id        INTEGER,
    status           TEXT NOT NULL DEFAULT 'pending',  -- pending | scheduled | running | completed | failed
    run_at           TEXT,       -- ISO datetime; NULL means run immediately
    total_emails     INTEGER DEFAULT 0,
    processed_emails INTEGER DEFAULT 0,
    created_at       TEXT DEFAULT (datetime('now')),
    completed_at     TEXT,
    error_message    TEXT,
    retry_of_job_id  INTEGER     -- set for retry jobs; links back to source job
);

CREATE TABLE failed_extractions (
    id            INTEGER PRIMARY KEY AUTOINCREMENT,
    job_id        INTEGER NOT NULL,
    email_id      TEXT NOT NULL,
    error_message TEXT,
    created_at    TEXT DEFAULT (datetime('now'))
);

[2026-03-05 14:22:01] [INFO] Worker started, polling every 10 seconds
[2026-03-05 14:22:11] [INFO] Job 1 picked up: schema_id=None, 10 emails to process
[2026-03-05 14:22:13] [INFO] [1/10] email_id=e001 extracted: topic=recruiter outreach, tone=positive
[2026-03-05 14:22:14] [WARNING] [2/10] email_id=e002 retrying after error: JSONDecodeError
[2026-03-05 14:22:16] [ERROR] [2/10] email_id=e002 failed after retry, saved to failed_extractions
[2026-03-05 14:22:45] [INFO] Job 1 completed in 34.2s: 9 success, 1 failed