A synchronisation tool that brings framework changes from an upstream repository into a separate copy of the project through a reviewable pull request. An upstream repository is the original project that a copy follows.

Use it to preview differences, merge new skills and fixes, recover or reset the comparison point, and open an update pull request.

It keeps the copy updated without overwriting local configuration or pushing changes directly to the main branch.

aeon-update — Skill for Claude Code and Codex by aeonfun: A synchronisation tool that brings framework changes from an…

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.

agentmods

npx agentmods add skills/aeonfun/aeon/aeon-update

Any agent

npx skills add aeonfun/aeon --skill aeon-update

Clone the repo

git clone --depth 1 https://github.com/aeonfun/aeon

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/aeonfun/aeon/aeon-update.svg)](https://agentmods.dev/skills/aeonfun/aeon/aeon-update)

Your own site

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

Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 6,240 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. Scan, not verified.

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.

Model	Per session	Once invoked
Fable 5	$0.00037	$0.06240
Opus 5	$0.00018	$0.03120
Sonnet 5	$0.00007	$0.01248
Haiku 4.5	$0.00004	$0.00624

Measured 4d ago against content hash 40852bbefff4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

aeon-update 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 4d 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.

Every network call is `gh api`, which authenticates via `GITHUB_TOKEN` automatically - no `curl`, no `./secretcurl`, no `$SECRET` on the command line for the Bash permission layer to refuse, and no secret beyond the defa

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

aeon-update — 100% identical, 0 lines differ

skills/aeon-update/SKILL.md · 326 lines

How it starts

The opening of the file, as written. The whole thing — 326 lines — stays where its author put it; the contents beside it link to each section on GitHub.

${var} — mode selector; space-separated tokens, order-independent, all optional:

mode (sync | report, default sync) — sync opens a PR with the framework changes; report computes the delta and notifies, mutating nothing (dry run).

repo=owner/name — override the upstream source repo (else auto-resolved from this instance's parent, falling back to aeonfun/aeon).

reset=<sha|fork-point> — force the stored baseline to <sha> (or the merge-base with upstream) before running. Recovery / backfill lever.

Empty ⇒ sync from the auto-resolved upstream. Examples: `` · report · repo=aeonfun/aeon · reset=fork-point.

Today is ${today}. This is the fleet's downstream updater - the counterpart to fork-fleet. fork-fleet looks outward from the parent to find work in the forks worth pulling up; this skill runs inside an instance and pulls the parent's shipped framework changes down - new skills, script/harness fixes, workflow and doc updates - and lands them as a reviewable PR. It is how an instance stays current with aeonfun/aeon without a hand-run rsync-overlay rebase.

Operating principles

PR, never push to main. Every framework change ships as one reviewable PR. The operator merges.
Never clobber operator config. aeon.yml, STRATEGY.md, soul/, memory/, output/, .mcp.json and the git-derived catalogs are instance-owned. Upstream changes to them are surfaced for manual review in the PR body, never written into the tree.
3-way, not blind overwrite. A framework file the operator has already customized is auto-merged when its local edits and upstream's edits touch disjoint regions (a real git merge-file 3-way, S6); it is only listed as a conflict for a human when the same lines changed on both sides. This is what lets a hand-narrowed workflow keep receiving unrelated upstream fixes without a manual merge every run.
Silent when in sync. Baseline == upstream HEAD ⇒ nothing to do, no notification.
The baseline is the watermark, and it advances by merge. The new baseline SHA is written into the PR branch, so the watermark only moves when the operator merges the PR. Unresolved conflicts are tracked separately so advancing the baseline can never silently drop them.

Read the full file on GitHub · 326 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.

4d ago First seen · 326 lines · 37 tokens per session scan A 40852bbefff4

Subscribe to this mod's changes

aeon-update is a skill published in the GitHub repository aeonfun/aeon (706 stars, last pushed 4d ago), licensed MIT. It adds 37 tokens to every session and 6,240 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (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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