Email Management Skill

Read and search emails from Lark Mail via the lark CLI using IMAP with local caching.

Setup

Before using mail commands, IMAP credentials must be configured:

lark mail setup

This will prompt for IMAP credentials. See: https://www.larksuite.com/hc/en-US/articles/378111206512-log-in-to-lark-mail-through-a-third-party-email-client

Running Commands

Ensure lark is in your PATH, or use the full path to the binary. Set the config directory if not using the default:

lark mail <command>
# Or with explicit config:
LARK_CONFIG_DIR=/path/to/.lark lark mail <command>

Commands Reference

Check Status

lark mail status

Shows connection status and cache freshness. The freshness field indicates how stale the cached data is.

List Mailboxes

lark mail list

Sync Emails

Fetch new emails from the server into the local cache:

# Sync INBOX (default)
lark mail sync

# Sync with more parallel connections (faster for large mailboxes)
lark mail sync --workers 20

# Sync specific mailbox
lark mail sync --mailbox Sent

Flags:

• --mailbox, -m: Mailbox to sync (default: INBOX)
• --workers, -w: Number of parallel connections (default: 10)

Important:

• Run sync before searching if you need fresh data
• Sync is resumable - if interrupted, running it again only fetches messages not already cached

Search Emails

Search the local cache (fast, no network calls):

# List recent emails
lark mail search

# Filter by sender
lark mail search --from alice@example.com

# Filter by subject
lark mail search --subject "Q4 Report"

# Filter by date range
lark mail search --since 2025-01-01 --before 2025-01-15

# Combined filters
lark mail search --from boss@example.com --since 2025-01-01 --limit 10

# Search different mailbox
lark mail search --mailbox Sent

View Email Content

lark mail show --uid <uid>

The UID is obtained from search results.

Download as .eml

lark mail fetch --uid <uid>
lark mail fetch --uid <uid> --output ./emails/

Output Formats

All commands output JSON.

mail status Output

{
  "configured": true,
  "host": "imap.larksuite.com",
  "port": 993,
  "username": "user@example.com",
  "connection": "ok",
  "cache": {
    "last_sync": "2025-01-14T10:30:00+08:00",
    "freshness": "15 minutes ago",
    "uidvalidity": 12345,
    "last_uid": 4521
  }
}

mail search Output

{
  "mailbox": "INBOX",
  "last_sync": "2025-01-14T10:30:00+08:00",
  "freshness": "15 minutes ago",
  "total_cached": 1523,
  "results": [
    {
      "uid": 4521,
      "message_id": "<abc123@mail.example.com>",
      "date": "2025-01-14T09:15:00+08:00",
      "from_addr": "alice@example.com",
      "from_name": "Alice",
      "subject": "Q4 Report"
    }
  ],
  "count": 1
}

mail show Output

{
  "uid": 4521,
  "from": {
    "email": "alice@example.com",
    "name": "Alice"
  },
  "subject": "Q4 Report",
  "date": "2025-01-14T09:15:00+08:00",
  "message_id": "<abc123@mail.example.com>",
  "body": "Hi,\n\nPlease find the Q4 report attached...\n\nBest,\nAlice"
}

mail sync Output

{
  "mailbox": "INBOX",
  "new_messages": 5,
  "total_cached": 1523,
  "message": "synced 5 new messages"
}

Error Handling

Errors return JSON:

{
  "error": true,
  "code": "ERROR_CODE",
  "message": "Description"
}

Common error codes:

• CONNECTION_ERROR - IMAP connection failed (check credentials)
• SCOPE_ERROR - Missing mail permissions. Run lark auth login --add --scopes mail
• SYNC_ERROR - Failed to sync emails
• SEARCH_ERROR - Cache query failed
• VALIDATION_ERROR - Missing required fields (e.g., --uid)
• IO_ERROR - File system error

Required Permissions

This skill requires the mail scope group. If you see a SCOPE_ERROR, the user needs to add mail permissions:

lark auth login --add --scopes mail

To check current permissions:

lark auth status

Typical Workflow

1. Check cache freshness:

   lark mail status
   

2. Sync if needed (based on freshness):

   lark mail sync
   

3. Search emails:

   lark mail search --from boss@example.com --since 2025-01-01
   

4. View email details using UID from search:

   lark mail show --uid 4521
   

5. Download if needed:

   lark mail fetch --uid 4521