Rules & repo support

What is monorepo support?

Handling a repository containing many projects: per-directory configuration, ownership and scoped analysis.

By Cláudia FernandesUpdated 2026-10-02

In a monorepo, one repository holds many services owned by different teams with different languages and standards. A tool that treats it as a single unit produces one undifferentiated finding list and one meaningless quality grade.

Real support means scoping analysis to changed paths, applying different configuration per subdirectory, and routing findings to the owning team. Without it, adoption stalls because nobody feels responsible for the shared number.

What to look for

Per-directory configuration and quality gates
Analysis scoped to changed paths rather than the whole tree
Ownership routing, typically via CODEOWNERS
Pricing model, since some tools bill a monorepo as a single project, others by size

Best 18 code quality, security and code review tools with monorepo support

Every tool in the directory whose documentation covers this, 12 fully and 6 partially. Full support is shown first. Shown in a random order that changes on every visit, so no tool gets an advantage from its position.

Support is not the same as parity, since some implementations are narrower in scope, gated to a higher plan tier, or maintained only for existing customers. The note under each tool is what its own documentation describes.

Code Security Platform

Aikido

Split monorepo per path (Pro+); GitLab/Azure DevOps only, no secrets scanning

AI Coding Agent

ChatGPT / Codex

Nested per-service AGENTS.md rules and path-based severity overrides; review pane also handles multi-repo projects.

AI Coding Agent

Claude Code

Dedicated docs cover per-package CLAUDE.md, sparse worktrees, and per-directory skills for monorepos.

Code Security Platform

Corgea

BLAST endpoint-reachability analysis attributes findings to the correct sub-project within a monorepo.

PR Review Tool

Cursor (Bugbot)

Nested BUGBOT.md discovery upward from changed files, glob-scoped rules, ROUTING.md product boundaries.

Code Quality Platform

DeepSource

All tiers provide monorepo support alongside unlimited pull request reviews.

Code Security Platform

GitHub Advanced Security

category param documented for monorepo SARIF differentiation; matrix builds run per-component analysis in parallel

PR Review Tool

Greptile

Cascading .greptile/ per-directory config lets monorepo packages own strictness, rules and filters

Code Quality Platform

Qlty

Sandboxed per-plugin installs, prefix/package_file scoping, directory-scoped triage, differential analysis, directory-level UI

PR Review Tool

Qodo

Path-pattern rule scopes, folder-level rule scoping, folder allow-listing in ignore rules

Code Security Platform

Snyk

The CLI's --all-projects flag explicitly documents monorepo scanning, alongside --detection-depth and --exclude for multi-package repos.

Code Quality Platform

SonarQube

Multi-project repository analysis with monorepo branch, PR, and scoped analysis.

PR Review Tool

CodeAnt AI

"Monorepo" appears only in test-coverage upload tagging docs (per-module coverage); no equivalent guidance for code-review or security scanning across a monorepo's packages.

PR Review Tool

CodeRabbit

Glob path filters/instructions and hierarchical per-directory config; monorepos never named explicitly

Code Quality Platform

CodeScene

Architectural definitions give subsystem, component and service-level analysis; monorepos never named explicitly

AI Coding Agent

Gemini Code Assist

Multiple separate repositories can be selected as chat context; scanning or configuring multiple packages within a single repository is not documented.

Code Security Platform

Semgrep

Dashboard project filters can target a monorepo subfolder; no wider monorepo handling documented.

Code Security Platform

Veracode

Multi-module build uploads let you choose which modules to scan, adjacent to monorepo scanning; repo-scanning docs never use the term "monorepo" or describe per-directory project scoping.

Custom Rule Authoring

FAQ