Architecture diagrams that keep up with your code
Generate a diagram from your repo, then let MermaidCreator watch for stale architecture knowledge. Every pull request can show what it changes, and merges open review-first drift findings instead of silently changing your docs.
Repo generation, PR knowledge impact, evidence links, and drift review are all part of DiagramOps.
Every architecture doc starts true and slowly turns into fiction
Someone draws the system in a wiki. Six months and a hundred merges later, nobody trusts it — so nobody updates it, and new hires piece the real architecture together from grep and guesswork. The fix isn't more discipline. It's a diagram that reads the code itself.
1 · Connect
Point it at a repo
Install the GitHub app on a repository and pick it in your workspace. It reads the file tree and your dependencies — no access to anything it doesn't need.
2 · Generate
Get a real architecture diagram
One click and you have a layered diagram of how the system fits together — frontend, services, data, and the external tools you actually depend on.
3 · Forget about it
It opens a review queue
From then on it lives in your pull requests and opens drift findings on merge. You approve the knowledge update instead of trusting a silent rewrite.
The diagram shows up where the work happens
Reviewers see the change, not just the diff
Open a PR and the bot comments a small diagram of exactly what it touches — the shape of the change, before anyone reads a line of code.
The full architecture, right in the thread
The same comment carries the system diagram, rendered natively by GitHub. Context is one scroll away, not buried in a wiki.
It opens findings on merge
Merge to main and DiagramOps creates review-first findings with suggested Mermaid updates. Auto-apply is opt-in per source for teams that want the legacy behavior.
Generated from a repo — renders natively in GitHub
flowchart TD
subgraph FE["Frontend"]
APP["Web app"]
end
subgraph API["Backend / API"]
ROUTES["API routes"]
JOBS["Background jobs"]
end
subgraph DATA["Data"]
DB["Postgres"]
end
subgraph EXT["External Services"]
PAY["Payments"]
MAIL["Email"]
end
APP --> ROUTES
ROUTES --> DB
JOBS --> DB
ROUTES -->|"webhook"| PAY
JOBS -->|"sends"| MAILSee your system drawn from its own code
Generate your first repo diagram on DiagramOps, with PR knowledge impact and drift review built in for your team.
Get started