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Event Sourcing

Checked
aj-geddes·vlatest·other·MIT

Event Sourcing captures application state changes as a sequence of events, enabling robust auditing, debugging, and temporal queries for improved data management.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add aj-geddes/useful-ai-prompts --skill event-sourcing -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

aj-geddes

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

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    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned aj-geddes/useful-ai-prompts at 3f5182cfd7.

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Commit
3f5182cfd7
Manifest
skills/event-sourcing/SKILL.md
Scanned
7 files, 669 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

The event-sourcing skill enables AI agents to record all state changes as a sequence of immutable events rather than storing current state snapshots. This approach allows systems to reconstruct past states, audit actions, and derive new states by replaying the event log.

When to use it

  • Implementing financial ledgers where every transaction must be auditable and irreversible.
  • Building collaborative editing tools that need to resolve conflicts by replaying user actions.
  • Creating debugging environments where you can rewind a system to a specific point in time.
  • Designing data pipelines that require deriving current views from historical change streams.

Key capabilities

  • Stores state transitions as an append-only log of events.
  • Reconstructs historical system states by replaying event sequences.
  • Enables full audit trails for compliance and debugging purposes.
  • Supports multiple read models derived from the same event stream.

Example prompts

"Design a banking ledger that uses event sourcing to track every deposit and withdrawal as an immutable event." "Create a collaborative document editor where conflicts are resolved by replaying user edit events in chronological order." "Build a system that can rewind a user's shopping cart to the state it was in 10 minutes ago using an event log."

Tips & gotchas

Event sourcing requires careful planning for schema evolution, as changing event structures can break historical data interpretation. Ensure your agents understand that current state is not stored directly but must be calculated by aggregating all prior events.