analysis-orchestrator

name	analysis-orchestrator
description	Orchestrate a full codebase analysis using all static analysis tools (knip, dependency-cruiser, jscpd) and synthesize findings.
compatibility	Requires pnpm. Works with TypeScript/JavaScript projects including Next.js, React, Node.js.
metadata	{"author":"codebase-analysis-agent","version":"1.0"}

Analysis Orchestrator

Coordinate all static analysis tools and synthesize their output into a unified picture of codebase health.

When to use this skill

• "Run a full codebase analysis"
• "Update the findings document"
• "Check if the codebase is clean before merging"
• "What has changed since the last analysis run?"
• "Is this new code following architectural rules?"

Quick start

# Run everything
pnpm analyze:all

# Or individually per tool
pnpm analyze:deps:validate
pnpm analyze:dead
pnpm analyze:dupes

Step-by-step orchestration

Step 1 — Architecture validation (fastest, run first)

pnpm analyze:deps:validate

Expected clean output:

✔ no dependency violations found

If violations appear, investigate before proceeding.

Step 2 — Dead code scan

pnpm analyze:dead

knip exits code 1 when findings exist — this is expected, not a failure.

Step 3 — Duplicate detection

pnpm analyze:dupes

HTML reports are written to /tmp/jscpd-report/html/. Open them for detailed side-by-side diff views.

Step 4 — Cross-reference and synthesize

After running all tools, look for cross-tool patterns:

Pattern A: Bypassed utility

knip:  "helperFn" — unused export
jscpd: helperFn clones inline code elsewhere

→ A utility exists, nobody imports it, and the logic was written inline elsewhere.

Pattern B: Missing route or export

knip:  "getItemById" — unused export
(no matching route/handler)

→ A service function was written but never wired up.

Pattern C: Orphaned feature

knip: multiple unused exports in same file cluster
jscpd: no clones (unique implementations)

→ A complete subsystem with no callers.

Synthesizing findings into a report

Use a findings document (e.g., docs/ANALYSIS_FINDINGS.md). When updating it:

1. Keep existing comments/annotations — developer notes are important context
2. Update the generation timestamp in the document header
3. Cross-reference new findings against known findings before adding them
4. Preserve open items from the previous run unless confirmed resolved
5. Add new findings in the correct section based on classification

Key cross-tool signals

Signal	Meaning	Action
knip unused + jscpd duplicate	Bypassed utility	Wire the caller to use the utility
knip unused + no route	Missing route	Add the route, don't delete the service
knip multiple unused + no clones	Orphaned subsystem	Document as future feature

Handling project types

Next.js (App Router)

• Entry points: app/page.tsx, app/layout.tsx, app/route.ts
• Components: components/**/*.tsx
• Hooks: hooks/**/*.ts, hooks/**/*.tsx
• Server actions: app/actions.ts, lib/actions.ts
• Important: Files in app/ are entry points via routing, not imports

Next.js (Pages Router)

• Entry points: pages/_app.tsx, pages/_document.tsx
• API routes: pages/api/**/*.ts
• Components: components/**/*.tsx

React Library / Component Library

• Entry point: src/index.ts
• Components: src/components/**/*.tsx
• Hooks: src/hooks/**/*.ts, src/hooks/**/*.tsx
• Utils: src/lib/**/*.ts

Node.js / Backend

• Entry point: src/index.ts, src/main.ts
• Common pattern: handlers/ → actions/ → services/

shadcn/ui Component Library

• Ignore components/ui/ in jscpd (auto-generated boilerplate)
• knip may flag unused exports — check if used via cn() utility
• lib/utils.ts uses template strings for class names - knip won't trace these

Output format for findings

### P[N] — [Short description]

**File**: `path/to/file.ts:line`
**Status**: [A | B | B (bypassed) | C]

[What the symbol/function does]

[What the tool output showed]

[Why this matters]

**Action needed**: [Specific recommended fix]

What to cross-reference

Before marking anything as new, check existing findings:

• "Exports That Are Fine" table — previously reviewed and intentional symbols
• "Orphaned Subsystems" section — existing orphaned clusters
• "Priority Action Items" — open items still awaiting resolution

Example agent response

**Codebase Analysis — [project name]**
**Run date**: 2026-03-29

**Architecture**: ✔ No violations

**Dead code summary**:
- N unused files, N unused exports, N unused dependencies

**New findings since last run**: [symbols not previously documented]

**Previously documented findings still open**:
- P1: [description]
- P2: [description]

**Cross-tool signals**:
- [Any bypassed utility patterns]

**Recommendation**: [highest priority action]

See docs/ANALYSIS_FINDINGS.md for full details.

Config files reference

See individual skill docs for:

• .jscpd.json — Duplicate code detection config
• knip.json — Dead code analysis config
• .dependency-cruiser.cjs — Architecture validation config

Next.js/React Quick Start

For Next.js App Router projects, use these recommended settings:

.jscpd.json

{
  "format": ["typescript", "tsx"],
  "output": "/tmp/jscpd-app",
  "ignore": [
    "**/__tests__/**",
    "**/*.test.tsx",
    "**/node_modules/**",
    "app/**/page.tsx",
    "app/**/layout.tsx",
    "components/ui/**"
  ]
}

knip.json (Next.js App Router)

{
  "entry": ["app/page.tsx", "app/layout.tsx", "app/route.ts"],
  "project": ["app/**/*.ts", "app/**/*.tsx", "components/**/*.ts", "components/**/*.tsx", "lib/**/*.ts"],
  "ignore": ["components/ui/**", "app/**/page.tsx", "app/**/layout.tsx", "app/**/not-found.tsx", "app/**/error.tsx", "**/__tests__/**"],
  "ignoreDependencies": ["clsx", "tailwind-merge", "class-variance-authority"],
  "ignoreExportsUsedInFile": true
}

.dependency-cruiser.cjs (Next.js)

module.exports = {
  forbidden: [
    {
      name: "no-circular",
      severity: "error",
      from: {},
      to: { circular: true }
    }
  ],
  options: {
    doNotFollow: { path: "node_modules" },
    tsConfig: { fileName: "tsconfig.json" }
  }
};