---
title: Reference
description: Thegram reference documentation.
url: https://docs.thegram.one/ko/reference/
lang: en
requested_lang: ko
fallback_from: https://docs.thegram.one/reference/
tier: current
---

# Reference

Thegram reference documentation.

<div class="tg-links">

- [Storage Permissions in Local, Vault, and Drive Workflows](/reference/storage-permissions/)\
  Choose a storage boundary deliberately: local files, Thegram Vault mounts, and Google Drive mounts have different identities, permissions, paths, synchronization, and conflict behavior.
- [.gram syntax](/reference/syntax-guide/)\
  The current source envelope, identifiers, fields, blocks and literal escaping.
- [Records and fields](/reference/records-guide/)\
  Current record types, field multiplicity and stable identifiers.
- [Relations and references](/reference/relations-guide/)\
  Directional record links, REL records and unresolved external targets.
- [Revision history and recovery](/reference/history-guide/)\
  History/6 replay, legacy readers, selectors, CAS and stale-write recovery.
- [MCP errors and write recovery](/reference/mcp-errors/)\
  Structured failures, CAS, receipts, retries and mount-specific recovery.
- [MCP tools](/reference/mcp-tools/)\
  Current Thegram Cloud MCP tool list with input schemas and annotations.

</div>

## Legacy archive {#legacy}

These pages describe paths that are no longer current. They keep their URLs for existing links.

<div class="tg-links">

- [MCP tools: retained 15-tool capture (2026-10-12)](/archive/mcp-tools-15-tool-capture/)\
  Historical 15-tool MCP schema capture with request and output fixtures from local producer 0.9.8; superseded by the current tools/list contract.

</div>