REPOSITORY ARCHITECTURE

Repository Structure Analysis: Detecting Architectural Drift & Modular Coupling

Catalayer Code Technical Manual•Updated 2026-10-18•7 min read

As repositories grow, modular boundaries erode. What began as a clean layered architecture degrades into spaghetti dependencies, undocumented cross-package imports, and configuration fragmentation. Catalayer Code scans directory trees to map architectural drift.

DETERMINISTIC PRINCIPLES

Evaluation Foundations

01

Rule Assertion

Directory topology mirrors system architecture.

02

Rule Assertion

Circular dependencies between sibling packages indicate leaky abstractions.

03

Rule Assertion

Monorepos require centralized dependency governance and workspace lockfile coordination.

04

Rule Assertion

Detecting structural decay early prevents painful multi-month architectural rewrites.

RULE MATRIX

Deterministic Check Signals

Specific verifiable repository conditions evaluated by Catalayer Code.

SIGNAL NAMEVERIFIED REPOSITORY CONDITIONCONFIDENCETARGET RISK MITIGATED
Workspace Boundary EnforcementValidates pnpm-workspace.yaml, lerna.json, or npm workspaces definitionsHIGHOrphaned packages and uncoordinated dependency versions
Deep Nesting Topology RiskFlags directory nesting exceeding 6 levels deepMEDIUMExcessive coupling and fragile import paths

Observable Signs of Structural Decay

Structural rot presents concrete symptoms: duplicated utility modules across sibling folders, inconsistent tsconfig.json configurations, and root-level script bloat. Catalayer Code highlights these signals to maintain clean separation of concerns.

BOUNDARY & LIMITS

Explicit Technical Limitations

What this inspection method does not and cannot evaluate.

  • Inspects static file tree structures; does not trace dynamic runtime dependency injection.
  • Domain-specific architectural patterns (e.g. Clean Architecture vs. Hexagonal) require contextual human interpretation.

Inspect Any Public GitHub Repository

Run deterministic checks against any public repository without granting OAuth permissions. Review structural gaps, untested changes, and reviewability findings with evidence.

Frequently Asked Questions

Can Catalayer Code inspect monorepos?

Yes. It recognizes package workspaces across JavaScript/TypeScript, Go workspaces, Cargo workspaces, and Python poetry/uv monorepos.

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