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    Time Zone Contract Repair

    1

    Repair time-zone contract drift in a repository using Cursor.

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    Time Zone Contract Repair

    Time Zone Contract Repair

    Example session with this skill installed

    Audit our booking service and worker logic. Recurring appointments drift after DST, and our reports vary by server location. Fix the code to use IANA zones and stable occurrence IDs.

    • Read your context and instructions
    • Compiled the time zone contract

    I have identified 6 drift points. Findings include naive UTC conversions in the API and fixed 24-hour recurrence offsets. I have prepared a patch adding IANA zone validation and half-open report ranges. 12 new deterministic tests verify the fix across DST gaps and folds.

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

    About this skill

    The problem

    Date and time behavior often drifts across API schemas, database columns, and background workers. Naive timestamps, lost zone identities, and broken recurrence logic lead to shifted all-day events and duplicate or missed scheduled jobs.

    What it does

    • Traces temporal values from user input through validation, storage, and worker execution to find contract drift.
    • Identifies naive timestamps, false UTC conversions, and fixed-offset recurrence errors during DST transitions.
    • Introduces explicit temporal types and IANA zone validation to replace fragile numeric offsets.
    • Repairs overnight availability windows and reporting boundaries to ensure consistency across different server zones.
    • Updates mocks, fixtures, and tests to verify time-sensitive logic deterministically without using live clocks.

    Frameworks & tools

    Works with repository materials including Prisma, Django, SQLAlchemy, BullMQ, Celery, and standard date libraries. Uses local verification tools like Bash, grep, and repository-specific test runners.

    Why this beats prompting it yourself

    Handling daylight saving gaps, autumn folds, and recurrence expansion requires a strict "time contract" approach that generic prompts miss. This skill enforces a comprehensive audit of every temporal layer, from database session zones to serialization, ensuring patches are bounded and safe.

    Use cases

    • Fixing all-day calendar events that shift dates when viewed in different time zones.
    • Repairing recurring reminders that drift an hour after a daylight saving transition.
    • Resolving duplicate background jobs caused by autumn clock changes.
    • Standardizing report boundaries so daily exports don't change based on container location.

    Known limitations

    Does not access live calendars, production databases, or external booking providers. Will not execute data migrations or select organization-wide business time zone policies.

    Find more skills like this on the Claude Skills Marketplace, the Codex Skills Marketplace and the Gemini Skills Marketplace, or browse Claude Skills for Agents & Orchestration.

    Cannot access live production data, external APIs, or calendars. Requires existing repository tests or mocks for verification. Does not perform data migrations or production deployments.

    How to use

    1. 1

      Connect your agent to the Agensi MCP

      Copy the prompt and paste it into Claude, ChatGPT, Cursor or any agent that supports MCP. It sets up the connection for you. Manual setup

    2. 2

      Sign in to Agensi

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    3. 3

      Ask for what you need

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    Security scan passed 3 months ago

    Permissions

    Terminal / Shell
    Read Files
    Write Files

    Permissions are limited to the active local workspace and are used to inspect user-supplied or local workspace files; create or modify bounded local fixes, tests, documentation, or review artifacts; run repository-supported local tests, checks, builds, or parsing commands. The skill package does not require bundled credentials, unrestricted external network access, or automatic production changes.

    Listed3 months ago
    Updated9 days ago

    What's inside

    Frequently Asked Questions

    This skill audits your entire codebase—from database schemas to background worker logic—to identify and fix naive timestamps, broken DST recurrence, and inconsistent zone handling that leads to scheduling errors.

    It is designed for use with advanced AI coding agents and is compatible with major backend frameworks like Django, SQLAlchemy, Prisma, and task queues like Celery or BullMQ.

    You receive the specialized skill definition for your AI agent, along with a set of deterministic testing patterns and temporal contract templates to apply across your repository.

    The skill includes logic to update your mocks and fixtures, allowing your test suite to simulate DST transitions and clock shifts deterministically without relying on the system clock.

    No, for security and safety, the skill focuses on the codebase and repository layers; it will provide the logic for repairs but will not execute migrations on live production databases.

    The skill identifies 'naive' datetime objects and replaces them with explicit IANA zone validation and ISO-8601 serialized formats to ensure consistent behavior across distributed systems.

    New in Agents & Orchestration