analysis-provenance

name	analysis-provenance
version	1.0.0
description	Identify code ownership before modifying validators or linters. Checks file headers for provenance indicators, reviews documentation, and determines provenance as UPSTREAM, LOCAL, VENDOR, or UNKNOWN. Prevents accidental modification of upstream tools.
license	MIT
user-invocable	true

Analysis Provenance

Identify code ownership before modifying validators, linters, or tool configurations.

Triggers

• check provenance before modifying
• is this file upstream or local
• who owns this validator
• check code ownership
• analyze provenance

---

Quick Start

# Check provenance of a single file
python3 .claude/skills/analysis-provenance/scripts/check_provenance.py --target .config/markdownlint.json

# Check provenance of a directory
python3 .claude/skills/analysis-provenance/scripts/check_provenance.py --target .config/

# JSON output for automation
python3 .claude/skills/analysis-provenance/scripts/check_provenance.py --target PSScriptAnalyzerSettings.psd1 --format json

---

Quick Reference

Category	Meaning	Action
UPSTREAM	External dependency (npm, pip, NuGet)	Configure, do not modify
LOCAL	Project-owned code	Modify as needed
VENDOR	Copied/vendored upstream code	Avoid modification, track upstream
UNKNOWN	Cannot determine	Investigate before modifying

---

When to Use

Use this skill before:

• Modifying any validator or linter behavior
• Changing tool configuration files
• Investigating unexpected validation failures
• Updating analyzer settings

---

Process

graph TD
    A[Target file or directory] --> B["1. Target Resolution<br/>Resolve paths, check exists"]
    B --> C["2. Directory Analysis<br/>node_modules, .venv, vendor,<br/>.gitmodules"]
    C --> D["3. Package Manifest Analysis<br/>package.json, requirements,<br/>lockfiles"]
    D --> E["4. File Header Analysis<br/>First 20 lines: generated<br/>markers, copyright notices"]
    E --> F["5. Provenance Determination<br/>Weight signals, return<br/>category + evidence"]
    F --> G["Decision:<br/>UPSTREAM - configure only<br/>LOCAL - safe to modify<br/>VENDOR - track upstream<br/>UNKNOWN - investigate first"]

---

Decision Tree

Need to modify a validator/linter?
│
├─ Run: python3 .claude/skills/analysis-provenance/scripts/check_provenance.py --target <file>
│
├─ Result: UPSTREAM
│  ├─ Do NOT modify the tool/file directly
│  ├─ Adjust local configuration instead
│  ├─ Check for configuration override options
│  └─ If no override exists, document why the rule is suppressed
│
└─ Result: LOCAL
   ├─ Safe to modify as needed
   ├─ Follow project coding standards
   └─ Test changes before committing

---

Command Reference

From the repository root, run:

python3 .claude/skills/analysis-provenance/scripts/check_provenance.py --target <path> [options]

Parameter	Required	Default	Description
--target	Yes	-	File or directory to analyze
--format	No	text	Output format: text, json
--verbose	No	false	Include all evidence details

Exit Code	Meaning
0	Provenance determined successfully
1	Script error (file not found, invalid arguments)

---

Anti-Patterns

Avoid	Why	Instead
Modifying files in node_modules	Changes lost on npm install	Configure via local config files
Editing vendored code	Breaks upstream tracking	Document suppression, fork if needed
Skipping provenance check	Accidental upstream modification	Always check before modifying
Assuming config is local	May be generated or vendored	Verify with this skill

---

Verification

After running provenance check:

• Category determined (UPSTREAM/LOCAL/VENDOR/UNKNOWN)
• Evidence provided with signal types
• Recommendation matches category
• Exit code is 0 (successful analysis)

---

Related Skills

Skill	Relationship
style-enforcement	Configure vs modify validators
programming-advisor	Evaluate external solutions
analyze	Broad codebase investigation

---

Detection Signals Reference

Upstream Indicators

Signal	Location	Example
Package manifest entry	package.json	"markdownlint-cli2": "^0.12.1"
Node modules path	node_modules/	Any file under this directory
Python site-packages	.venv/, site-packages/	Any file under these directories
NuGet cache	.nuget/, packages/	Any file under these directories
File header comment	First 20 lines	"Generated by", "DO NOT EDIT", copyright notice
Git submodule	.gitmodules	Path matches submodule

Local Indicators

Signal	Location	Example
Under project root	Outside dependency directories	src/, .config/, scripts/
No external version	Not in lockfiles	Custom script
Project copyright	File header	Project-specific copyright
Git tracked	.git/	In project git history

Vendor Indicators

Signal	Location	Example
vendor/ directory	Project root	vendor/third-party/
Vendor comment	File header	"Vendored from "
VENDORED.md reference	Same directory	Documents upstream source

Examples

Check Validator Config (LOCAL)

python3 .claude/skills/analysis-provenance/scripts/check_provenance.py --target .markdownlint.json

Provenance Check: .markdownlint.json
====================================
Category: LOCAL
Confidence: HIGH
Evidence:
  - File is under project root
  - File is tracked in git
  - No external package reference found
Recommendation: Safe to modify as needed.

Check External Tool (UPSTREAM)

python3 .claude/skills/analysis-provenance/scripts/check_provenance.py --target node_modules/markdownlint-cli2/lib/main.js

Provenance Check: node_modules/markdownlint-cli2/lib/main.js
============================================================
Category: UPSTREAM
Confidence: HIGH
Evidence:
  - Located in node_modules directory
  - Package: markdownlint-cli2@0.12.1 (package.json)
  - npm registry: https://registry.npmjs.org/
Recommendation: Do NOT modify. Configure via .markdownlint.json instead.

JSON Output

python3 .claude/skills/analysis-provenance/scripts/check_provenance.py --target PSScriptAnalyzerSettings.psd1 --format json

{
  "target": "PSScriptAnalyzerSettings.psd1",
  "category": "LOCAL",
  "confidence": "HIGH",
  "evidence": [
    {"signal": "project_root", "value": true},
    {"signal":   
       
  
   

Common Validator/Linter Files

Tool	Config Files	Typical Provenance
markdownlint	.markdownlint.json, .markdownlint-cli2.jsonc	LOCAL
PSScriptAnalyzer	PSScriptAnalyzerSettings.psd1	LOCAL
ESLint	.eslintrc.json, eslint.config.js	LOCAL
Prettier	.prettierrc, .prettierrc.json	LOCAL
StyleCop	.stylecop.json	LOCAL
EditorConfig	.editorconfig	LOCAL
Tool binaries	node_modules/, .venv/	UPSTREAM

Integration with Agent Workflow

Before Modifying Validators

# Check provenance FIRST
python3 .claude/skills/analysis-provenance/scripts/check_provenance.py \
  --target <validator-file>

# If UPSTREAM: adjust config
# If LOCAL: modify file

In Pre-commit Hooks

# Prevent accidental upstream modifications
- id: provenance-check
  name: Provenance Check
  entry: python3 .claude/skills/analysis-provenance/scripts/check_provenance.py
  args: [--target, node_modules, --exit-on-upstream]
  language: python

---

Timelessness: 8/10

Dependency management and provenance tracking are fundamental software engineering practices. The upstream vs local distinction applies regardless of package manager or language. Configuration over modification is a timeless pattern for external dependencies.