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    AI Feature Impact Analyzer™

    1

    Map every code, API, database, test, and dependency affected by a feature change before implementation.

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    AI Feature Impact Analyzer™

    AI Feature Impact Analyzer™

    Example session with this skill installed

    I want to add a subscription cancellation feature.

    Requirements

    • Users can cancel immediately.
    • Users can also cancel at the end of their billing period.
    • Cancelled subscriptions should not renew.
    • Users should retain access until the end of the paid period when they choose end-of-period cancellation.
    • Admins should be able to see the cancellation status.

    Before I change any code, analyze the repository and tell me:

    1. Every file/module likely affected.
    2. API endpoints that need changes.
    3. Database tables/fields that may need changes.
    4. Frontend components that may need changes.
    5. Authentication/authorization implications.
    6. Payment/webhook dependencies.
    7. Existing tests that cover related behavior.
    8. Tests that are missing.
    9. Breaking-change risks.
    10. The safest implementation order.

    Do not modify any files.

    Only report findings supported by repository evidence.
    Clearly label inferred or unverified findings.

    • Read your context and instructions
    • Compiled the ai feature impact

    AI FEATURE IMPACT ANALYZER™
    ━━━━━━━━━━━━━━━━━━━━━━━━━━

    FEATURE
    Subscription Cancellation

    ANALYSIS STATUS
    COMPLETED

    CONFIDENCE
    HIGH

    OVERALL IMPACT
    HIGH

    ━━━━━━━━━━━━━━━━━━━━━━━━━━

    1. IMPACT SUMMARY
      ━━━━━━━━━━━━━━━━━━━━━━━━━━

    Estimated affected areas

    Backend: 7 modules
    Frontend: 4 components
    Database: 2 tables
    API: 3 endpoints
    Tests: 11 existing
    Missing tests: 6
    External flow: Payment webhook

    ━━━━━━━━━━━━━━━━━━━━━━━━━━
    2. DATABASE IMPACT
    ━━━━━━━━━━━━━━━━━━━━━━━━━━

    HIGH

    Affected

    subscriptions
    subscription_events

    Evidence
    subscriptions contains status and renewal-related fields.

    Potential changes

    • cancellation_status
    • cancelled_at
    • cancel_at_period_end

    Risk
    HIGH

    Reason
    Incorrect state handling could cause unintended renewals
    or premature access removal.

    ━━━━━━━━━━━━━━━━━━━━━━━━━━
    3. API IMPACT
    ━━━━━━━━━━━━━━━━━━━━━━━━━━

    POST /api/subscription/cancel

    Status
    LIKELY NEW

    Evidence
    Existing subscription management routes found.

    GET /api/subscription/status

    Status
    AFFECTED

    Reason
    Frontend currently consumes subscription status.

    ━━━━━━━━━━━━━━━━━━━━━━━━━━
    4. FRONTEND IMPACT
    ━━━━━━━━━━━━━━━━━━━━━━━━━━

    billing/SubscriptionPanel
    → cancellation UI required

    components/SubscriptionStatus
    → cancellation state required

    components/CancelConfirmation
    → likely new component

    ━━━━━━━━━━━━━━━━━━━━━━━━━━
    5. PAYMENT IMPACT
    ━━━━━━━━━━━━━━━━━━━━━━━━━━

    HIGH

    Detected

    payment webhook handler

    Potential dependency
    Subscription cancellation state may need to remain
    synchronized with payment-provider events.

    IMPORTANT
    External provider behavior could not be fully verified
    from the repository.

    Status
    UNVERIFIED

    ━━━━━━━━━━━━━━━━━━━━━━━━━━
    6. AUTHORIZATION
    ━━━━━━━━━━━━━━━━━━━━━━━━━━

    Admin cancellation visibility requires authorization review.

    Existing admin middleware
    FOUND

    Status
    VERIFIED

    ━━━━━━━━━━━━━━━━━━━━━━━━━━
    7. TEST IMPACT
    ━━━━━━━━━━━━━━━━━━━━━━━━━━

    Existing relevant tests
    11

    Missing scenarios

    ❌ Immediate cancellation
    ❌ End-of-period cancellation
    ❌ Duplicate cancellation request
    ❌ Unauthorized cancellation
    ❌ Webhook after cancellation
    ❌ Subscription already expired

    Priority
    HIGH

    ━━━━━━━━━━━━━━━━━━━━━━━━━━
    8. BREAKING-CHANGE RISKS
    ━━━━━━━━━━━━━━━━━━━━━━━━━━

    🔴 HIGH
    Subscription state transitions

    🟠 MEDIUM
    API response changes

    🟠 MEDIUM
    Frontend subscription-status handling

    🟡 LOW
    Admin display changes

    ━━━━━━━━━━━━━━━━━━━━━━━━━━
    9. RECOMMENDED IMPLEMENTATION ORDER
    ━━━━━━━━━━━━━━━━━━━━━━━━━━

    1. Define subscription state transitions
    2. Update database model/migration
    3. Update subscription service
    4. Implement cancellation API
    5. Synchronize webhook behavior
    6. Update authorization rules
    7. Update frontend state
    8. Add regression tests
    9. Run complete subscription test suite
    10. Review API compatibility

    ━━━━━━━━━━━━━━━━━━━━━━━━━━
    10. FINAL VERDICT
    ━━━━━━━━━━━━━━━━━━━━━━━━━━

    IMPLEMENTATION READINESS
    REVIEW REQUIRED

    Why

    The repository clearly shows subscription state and payment
    dependencies, but external payment-provider cancellation
    behavior is not fully verifiable from local files.

    DO NOT START IMPLEMENTATION UNTIL

    ✓ State transitions are finalized
    ✓ Payment-provider behavior is confirmed
    ✓ Missing cancellation tests are planned
    ✓ Migration strategy is defined

    Connects securely to your tools. The creator never sees your data.

    What you get

    Analyze feature impact before codingFind affected files and modulesMap API and database dependenciesDetect hidden feature dependenciesIdentify required regression testsPlan large codebase changesAssess breaking-change riskGenerate implementation plans

    About this skill

    AI Feature Impact Analyzer™ analyzes a requested feature or change against the actual repository and produces an evidence-backed Feature Impact Map before development begins.

    Instead of asking an AI agent to immediately modify code, this skill first determines what the requested change can affect, where those dependencies live, what could break, and what should be changed or tested.

    It analyzes:

    Repository architecture Relevant source files Components and modules API endpoints Database tables and relationships Authentication and authorization paths External integrations Configuration and environment variables Shared utilities Dependencies Existing tests Documentation Frontend/backend contracts Event and webhook flows Feature flags Potential breaking changes Core workflow

    Feature Request → Repository Discovery → Dependency Mapping → Impact Analysis → Risk Assessment → Test Impact → Implementation Order → Change Plan

    For each affected area, the skill reports:

    What is affected Why it is affected Evidence Risk level Potential regression Required tests Recommended implementation order Example

    For:

    “Add subscription cancellation with immediate and end-of-period cancellation.”

    The skill can identify:

    DATABASE

    ├── subscriptions ├── subscription_events └── billing_history

    BACKEND

    ├── cancellation API ├── webhook handler ├── authorization └── billing service

    FRONTEND

    ├── billing page ├── confirmation modal └── subscription status

    TESTS

    ├── API tests ├── payment tests ├── authorization tests └── UI tests

    It then identifies hidden dependencies, breaking-change risks, missing tests, and the safest implementation sequence.

    Evidence-first analysis

    The skill must distinguish:

    VERIFIED — supported by repository evidence.

    INFERRED — likely based on repository structure but not directly confirmed.

    UNVERIFIED — required evidence was unavailable.

    It must never invent affected files, dependencies, test coverage, API relationships, or database relationships.

    What makes it different

    This is not a generic code review tool.

    A code reviewer asks:

    “Is the existing code good?”

    Feature Impact Analyzer asks:

    “If we change this, what else can this change affect?”

    The result is a concrete implementation-impact map that developers can use before writing code.

    Safety

    The default workflow is read-only analysis.

    It should not modify production code, delete files, alter databases, install dependencies, or execute destructive commands unless the user explicitly requests those actions.

    How to install

    Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.

    ~30 seconds
    1. 1

      Download the ZIP

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    2. 2

      Unzip into your skills folder

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    3. 3

      Ask your agent to use it

      Restart the agent if it was already running. It picks the skill up automatically - no config needed.

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    Security scanned

    Verified clean 1 month ago

    • Passed all security checks, Safe to install

    Listed1 month ago
    Updated27 days ago

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