Source of Truth

Source of Truth is a structured graph of your entire documentation — pages, headings, sections, and cross-links — kept in sync with the GitHub repository. AI agents read it through the Docsbook MCP server and use it to answer questions or trigger workflows.

What the graph contains#

For each page the graph stores:

Canonical reference (owner/repo/path#section)
Title and frontmatter
Heading tree with stable anchors
Section bodies (markdown)
Outbound and inbound links

This is the same structure that powers llms-full.txt, but exposed as a queryable API rather than a flat file.

Formats#

Request the graph in either format:

{ "format": "toon" }

{ "format": "json" }

toon is a compact, token-efficient representation designed to fit large graphs into an LLM context window. json is the canonical structured form for programmatic use.

MCP tools#

Three MCP tools operate on the graph:

Tool	Purpose
`get_doc_graph`	Return the full graph in the requested format
`read_doc_sections`	Read specific sections by canonical reference
`reindex_doc_graph`	Force a rebuild from the latest GitHub state

Freshness#

If the graph has not been rebuilt for more than 7 days, responses include a stale warning. Reindexing is rate-limited to 100 rebuilds per month per workspace — enough for hourly cron jobs without abuse.

Pricing#

Source of Truth is a PRO+ feature ($59/month). The underlying GitHub indexing runs on every plan, but graph access through the MCP API is gated to PRO+.

MCP Server — How agents authenticate and call the graph tools.
Webhooks — Subscribe to content.indexed and content.outdated events.