cratis-chronicle-client-elixir

cratis-chronicle-client-elixir is a skill for Claude Code, Codex from Cratis/AI. It costs 112 tokens per session (5,045 once invoked), scanned A, original, MIT.

A guide to using the cratis_chronicle library from an Elixir application. It covers putting the Chronicle client in an OTP supervision tree, appending events, and defining event handlers.

In plain words
What is it for?
Use it to connect an Elixir service to Chronicle, append events, and process them with reactors.
Why use it?
It clarifies that the library is an ordinary Elixir library and does not create a supervision tree for you. It also keeps guidance tied to the published version rather than unreleased code.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to connect an Elixir service to Chronicle, append events, and…

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Install with agentmods
npx agentmods add skills/cratis/ai/cratis-chronicle-client-elixir
View source ↗ Cratis/AI
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Cratis/AI --skill cratis-chronicle-client-elixir
Clone the repo
git clone --depth 1 https://github.com/Cratis/AI

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for cratis-chronicle-client-elixir

README.md
[![agentmods](https://agentmods.dev/badge/skills/cratis/ai/cratis-chronicle-client-elixir.svg)](https://agentmods.dev/skills/cratis/ai/cratis-chronicle-client-elixir)
Your own site
<a href="https://agentmods.dev/skills/cratis/ai/cratis-chronicle-client-elixir"><img src="https://agentmods.dev/badge/skills/cratis/ai/cratis-chronicle-client-elixir.svg" alt="Measured on agentmods" height="20"></a>
Per session 112 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,045 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00112 $0.05045
Opus 5 $0.00056 $0.02523
Sonnet 5 $0.00022 $0.01009
Haiku 4.5 $0.00011 $0.00505

Measured today against content hash dc97323a5070, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

cratis-chronicle-client-elixir scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/cratis-chronicle-client-elixir/SKILL.md · 430 lines

How it starts

The opening of the file, as written. The whole thing — 430 lines — stays where its author put it; the contents beside it link to each section on GitHub.

The Chronicle client for Elixir

cratis_chronicle is a standalone client SDK. It is a library, not a framework: it starts no supervision tree of its own, you add Chronicle.Client to yours, and everything after that is ordinary OTP.

Verified product sources

This skill is verified against Cratis/Chronicle.Elixir at tag v2.2.0, which is the version actually published on Hex.

Fact Value Source
OTP app / Hex package :cratis_chronicle Source/chronicle/mix.exs:14
Published version 2.2.0 hex.pm
Elixir requirement ~> 1.14 Source/chronicle/mix.exs:16
Contracts dependency cratis_chronicle_contracts resolved to 16.13.4 Source/chronicle/mix.lock

The v2.3.0 git tag was never published to Hex. mix deps.get cannot fetch it. Anything introduced there — notably the Chronicle.Concept macro, which does not exist at v2.2.0 — must not be documented as available.

The repository's VERSION file says 0.0.5 and is a build-time placeholder overwritten by the publish workflow. Never quote it.

Do not copy from the repository's root README.md. At v2.2.0 it uses module names that do not exist — use Chronicle.EventType, use Chronicle.ReadModel, use Chronicle.Reactor, use Chronicle.Reducer, use Chronicle.Seeder (README.md:9-13, :49, :54). The real modules are namespaced: Chronicle.Events.EventType, Chronicle.ReadModels.ReadModel, Chronicle.Reactors.Reactor, Chronicle.Reducers.Reducer, Chronicle.Seeding.Seeder. Copy from Documentation/client-snippets/ instead — those are CI-validated and correct at every version.

Documentation/get-started.md:12 pins {:cratis_chronicle, "~> 0.1"}, which does not match the published 2.2.0. Use a 2.x requirement.

Adding it

# mix.exs
defp deps do
  [
    {:cratis_chronicle, "~> 2.2"}
  ]
end

The library declares extra_applications: [:logger, :inets, :ssl] and no mod: (Source/chronicle/mix.exs), so nothing starts on its own. :inets and :ssl back the least-connections load balancer's HTTP probes.

Read the full file on GitHub · 430 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. today First seen · 430 lines · 112 tokens per session scan A dc97323a5070

Subscribe to this mod's changes

cratis-chronicle-client-elixir is a skill published in the GitHub repository Cratis/AI (2 stars, last pushed today), licensed MIT. It adds 112 tokens to every session and 5,045 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-06.

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