Every document in Sombra has full version history, powered by an immutable database. Your AI agent can look back to any point in time — no manual snapshots, no "save as v2", no git required.
Sombra is built on an immutable data store where nothing is ever overwritten in place. Every edit to every document creates a new revision with a precise timestamp. The full history is always there — these tools give your AI agent access to it.
changes_sinceWhat changed?
Returns a structured summary of every revision since a given timestamp: which sections were touched, how many lines changed, and when. Compact enough for your agent to scan without burning tokens.
read_snapshotWhat did it say?
Returns the full content of a document as it existed at any point in time. Optionally filter to a single section. Your agent can compare then and now without you having to find the right version.
The resume skill uses changes_since to show exactly what happened since your last session:
"I think we messed up the spec, what did it say on Tuesday?" Your agent calls read_snapshot with a section filter and returns just the relevant part — no need to pull the entire document.
Filter changes_since to a specific section and see every revision that touched it. Your agent can reconstruct the timeline of a decision without reading every version of the full document.
Structured summaries, not diffs
changes_since returns section names and line counts — not raw unified diffs. Your agent gets the signal it needs in a fraction of the tokens.
Section filtering
Both tools accept an optional section filter. Ask about "## Decisions" and get just that section — not the entire 30k-token document.
Newest-first ordering
Results come back with the most recent changes first. Your agent usually cares about what just happened, not the initial write.
Works everywhere
Available to any MCP client — Claude Code, Claude Desktop, ChatGPT, OpenCode. No git required.
These tools are part of the Sombra MCP server
Connect your AI agent and start using changes_since and read_snapshot right away.