Borrowing it
Nothing to install: this file belongs to aeonfun/aeon. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/aeonfun/aeon/main/.claude/skills/aeon/SKILL.mdgit clone --depth 1 https://github.com/aeonfun/aeonWrote 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.
[](https://agentmods.dev/skills/aeonfun/aeon/aeon)<a href="https://agentmods.dev/skills/aeonfun/aeon/aeon"><img src="https://agentmods.dev/badge/skills/aeonfun/aeon/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.
<a href="https://agentmods.dev/skills/aeonfun/aeon/aeon"><img src="https://agentmods.dev/badge/skills/aeonfun/aeon/aeon.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.09680 |
| Opus 5.5 | $0.00059 | $0.03872 |
| Sonnet 5.5 | $0.00029 | $0.01936 |
| Haiku 4.5 | $0.00015 | $0.00968 |
Grade C, and why
aeon scanned grade C with 3 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
"What am I doing by hand over and over that Aeon could just do?" Mode 4 turns *this* chat into a skill; Mode 8 mines *past* chats to find which chat is worth turning into one. It reads the operator's local coding-agent t Reads MCP configurationmediumAgent snooping
mcp.json carries server URLs and auth tokens; reading it lets a mod discover and abuse other integrations.
- **"No MCP tools available."** On the Claude harness a single unresolved `${VAR}` in `.mcp.json` disables **every** MCP server for that run, not just the broken one (`::warning::.mcp.json references secret(s) not set:` Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
<curl / WebFetch / `./secretcurl` / `gh api` - how this skill fetches> How it starts
The opening of the file, as written. The whole thing — 460 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 (an instance made with Aeon Connect lives atgithub.com/<owner>/<repo>like any other; no instance yet means Mode 1). -
Confirm
ghpoints at THEIR instance, before any command that writes.gh repo view --json nameWithOwner -q .nameWithOwnerIf that prints
aeonfun/aeonand they aren't working on upstream itself, stop and rungh repo set-default <owner>/<repo>.ghprefers anupstreamremote overoriginwhen no default is pinned, and every Aeon write (auth,secrets set,skills run, config pushes) is agh -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 throughgh. If it fails, tell them to rungh auth loginand stop. -
Use the
./aeonCLI for all config writes. It preserves comments inaeon.ymland 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).
What ships with it
7 files 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.
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.
- 3d ago Changed · -9 lines 59414e13490f
- 7d ago Changed · +21 lines 985fab7dc2ee
- 11d ago Changed 5a95cc09fb59
- 16d ago Changed · +4 lines ca24a852cb2c
- 17d ago Changed · +2 lines c08431514c51
- 20d ago Changed · -11 lines scan E → C 07027cf02c6f
- 21d ago Changed · -1 lines e21a9906cd4d
- 22d ago Changed · +1 lines 52457eaad267
- 25d ago Changed 3288152f61d2
- 1mo ago First seen · 453 lines · 147 tokens per session scan E 910706c728c9
aeon is a skill published in the GitHub repository aeonfun/aeon (783 stars, last pushed yesterday), licensed MIT. It adds 147 tokens to every session and 9,680 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it C with 3 findings (reads agent configuration directories, reads mcp configuration, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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