Docs-as-code for agencies: the complete 2026 guide

Agencies adopted docs-as-code almost by accident: you already work in git, you already live in an IDE, and AI editors made writing markdown fast. So the docs ended up in the repo, next to the code, versioned like everything else. This guide covers what that means, why it suits agencies specifically, the toolchain, and the one gap you'll hit — sharing with clients — and how to close it.

What docs-as-code actually means

Docs-as-code treats documentation like source:

• Plain text — markdown (.md / .mdx), not a proprietary format.
• In the repo — alongside the code it documents.
• Edited in your IDE — Cursor, Claude Code, VS Code.
• Version-controlled — every change tracked, diffable, revertible.
• Reviewed like code — pull requests, history, blame.
• Published with automation — rendered or built, not hand-copied.

The payoff: docs and code never drift, changes are auditable, and your existing workflow covers documentation too.

Why it fits agencies

1. You're already in git and an IDE. No new authoring tool to adopt.
2. AI writing is native. Cursor and Claude Code draft and update docs where they live; see documentation tools for Cursor / Claude Code users.
3. Per-project structure. Each client project's docs live with its code — clean separation.
4. Versioning for free. Git is the version history; no separate doc-versioning UI needed.

A minimal toolchain

• Repo: GitHub or GitLab.
• Editor: Cursor / Claude Code / VS Code.
• Format: Markdown + GFM (tables, code, task lists), Mermaid for diagrams.
• Conventions: a docs/ folder, a predictable structure, a .docignore for internal-only files.
• Sharing layer: a viewer/portal for non-technical readers (the gap below).

The gap docs-as-code leaves: sharing

Here's the problem every agency hits: markdown in a private repo is unreadable to clients. They don't have GitHub, shouldn't have repo access, and can't comment in a way you can act on. The usual workarounds — PDFs, Google Docs, GitHub invites — each break (stale, drifting, or over-exposing).

The clean solution keeps docs-as-code intact and adds a sharing layer on top:

• A portal renders the repo's markdown for browser reading.
• Clients sign in by email (no GitHub), scoped to their project.
• They comment per section; you resolve from one inbox.
• A **.docignore** keeps internal files out of the portal entirely.
• A role-aware MCP lets AI agents query the docs within each user's permissions.

This is exactly what an overlay like Miradorly provides — your team never leaves Cursor, and clients get a real reading-and-commenting experience.

Docs-as-code vs. moving to a docs platform

The platforms solve sharing by making you abandon docs-as-code. The overlay solves sharing while keeping it.

A practical setup checklist

1. Standardize a docs/ structure in each project repo.
2. Add a .docignore for secrets, drafts, and CLAUDE.md.
3. Write and edit docs in Cursor / Claude Code as part of normal work.
4. Connect the repo to a viewer for client sharing; invite by email with roles.
5. (Optional) Expose a role-aware MCP so clients' and your AI agents can query the docs.

Bottom line

Docs-as-code is the right default for agencies — it's where your workflow already is, and AI editors make it fast. Its only real weakness is sharing with non-technical clients, and you don't fix that by abandoning the model for a platform. You fix it with a thin overlay that renders the repo, handles permissions and comments, and adds a role-aware MCP — keeping the docs exactly where your team writes them.