A setup and management guide for Aeon, an agent that runs scheduled tasks in a GitHub repository. Its tasks are written as Markdown skill files and configured in a YAML file.

It helps create an Aeon instance, select or install skills, reschedule runs, edit skills, set the agent's guiding strategy and tone, and derive skills from past chats.

It helps turn repeated coding-agent work into scheduled tasks and explains how to fix tasks that do not run or change their timing and instructions.

aeon — Skill for Claude Code by aaronjmars/aeon-agent

Install

Getting it into your agent

There is no command for this one: it runs only inside a plugin, and the catalogue could not identify which plugin ships it. The source is linked below.

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/aaronjmars/aeon-agent/plugin__skills__aeon_/github.svg)](https://agentmods.dev/skills/aaronjmars/aeon-agent/plugin__skills__aeon_)

Your own site

<a href="https://agentmods.dev/skills/aaronjmars/aeon-agent/plugin__skills__aeon_"><img src="https://agentmods.dev/badge/skills/aaronjmars/aeon-agent/plugin__skills__aeon_/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/aaronjmars/aeon-agent/plugin__skills__aeon_"><img src="https://agentmods.dev/badge/skills/aaronjmars/aeon-agent/plugin__skills__aeon_.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 147 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 8,371 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. ✓ AI security review Sonnet 5 · 7 Sept 2026 📄 Read the review

Origin 97% copy Near-identical to another mod 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.

Model	Per session	Once invoked
Fable 5.1	$0.00147	$0.08371
Opus 5.5	$0.00059	$0.03348
Sonnet 5.5	$0.00029	$0.01674
Haiku 4.5	$0.00015	$0.00837

Measured 1mo ago against content hash bb7b23d77a1d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

aeon scanned grade A with 1 finding 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 1mo ago.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

Origin

This is a copy

97% identical to aeon — 244 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

output/.tmp-aeon-update/head/plugin__skills__aeon__SKILL.md · 452 lines

How it starts

The opening of the file, as written. The whole thing — 452 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Aeon

Aeon is an agent that runs on the user's own GitHub repo via Actions. A skill is a Markdown file (skills/<name>/SKILL.md); aeon.yml says which ones run and when.

Pick the mode they're asking for:


1 · Start	No instance yet, or set one up from scratch
2 · Reschedule	Change times, cadence, or what a skill focuses on
3 · Unblock	"It didn't run" / "nothing happened"
4 · Chat → skill	Turn what we just did into a scheduled skill
5 · Edit a skill	Change what an existing skill does
6 · What to turn on	Pick skills, browse packs, install more
7 · Strategy & voice	`STRATEGY.md` and `soul/` — the north star and the tone
8 · Mine history → skill	"What of my repeated work could Aeon do for me?" — surface it from past coding-agent chats

Preflight (every mode)

Find the repo: current dir → gh repo set-default → ask. Clone it if it isn't local.
Confirm gh points at THEIR instance, before any command that writes.
```
gh repo view --json nameWithOwner -q .nameWithOwner
```
If that prints aeonfun/aeon and they aren't working on upstream itself, stop and run gh repo set-default <owner>/<repo>. gh prefers an upstream remote over origin when no default is pinned, and every Aeon write (auth, secrets set, skills run, config pushes) is a gh -R <resolved> call — so it will cheerfully put their API keys on the upstream repo and dispatch runs there. It looks like success: no error, a real run id, and the skill just never fires on their instance.
gh auth status — everything routes through gh. If it fails, tell them to run gh auth login and stop.
Use the ./aeon CLI for all config writes. It preserves comments in aeon.yml and validates. Never hand-edit the YAML — with one exception: the CLI cannot create an entry for a brand-new skill (see Mode 4 step 4).

Don't trust "disabled" for a skill you just created. The read path lists skills from disk and defaults a missing aeon.yml entry to enabled: false, so "not configured" and "disabled" look identical. One command tells them apart:

Read the full file on GitHub · 452 lines

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.

1mo ago First seen · 452 lines · 147 tokens per session scan E bb7b23d77a1d

Subscribe to this mod's changes

aeon is a skill published in the GitHub repository aaronjmars/aeon-agent (12 stars, last pushed 8d ago), licensed MIT. It adds 147 tokens to every session and 8,371 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). It is 97% identical to aeon, differing in 244 lines, and is treated as a copy.

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