# update-aegis

Checks and updates the Aegis Method Pack installed for an AI coding host. Use it to inspect the current installation, apply an update, and verify the result.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · ★ 1388
- Author: GanyuanRan
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/GanyuanRan/Aegis/tree/HEAD/skills/update-aegis/SKILL.md
- Updated: 2026-10-25
- HTML: https://affpapa.org/en/nevibecode/skills/update-aegis

## What it does

The update-aegis skill maintains an installed Aegis Method Pack. It starts by checking the host registry with `python scripts/aegis-update.py status --json`, then updates the selected installation and runs `aegis-doctor.py` to verify the outcome. Updating Aegis should not modify the target project itself.

The updater supports different synchronization modes, including `junction` and `copy-skills`. Copy-based synchronization keeps unrelated files and local edits intact, and halts when a write would conflict. If the installed checkout contains local changes, those changes must not be overwritten without the user's decision; with explicit permission, the update can use `--stash`.

The default scope is the current host. Updating every registered installation requires an explicit `--all` request. For plugin-managed hosts, the platform's own plugin manager controls the update process. On OpenCode, for instance, this skill can register the host while leaving the actual update to its plugin manager.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add GanyuanRan/Aegis --skill update-aegis -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/update-aegis/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/update-aegis/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add GanyuanRan/Aegis --skill update-aegis -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/update-aegis/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add GanyuanRan/Aegis --skill update-aegis -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/update-aegis/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install GanyuanRan/Aegis update-aegis
```

2. **Manually: put the files in place**
- File: `.github/skills/update-aegis/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add GanyuanRan/Aegis --skill update-aegis -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/GanyuanRan/Aegis --path skills/update-aegis
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/update-aegis/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add GanyuanRan/Aegis --skill update-aegis -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/GanyuanRan/Aegis/tree/HEAD/skills/update-aegis/SKILL.md

## When to use it
- Check whether the installed Aegis version is current.
- Update the Aegis Method Pack for a selected host.
- Verify an update with `aegis-doctor.py`.
- Preserve local changes during an approved update.
- Identify file conflicts in a copied skill installation.

## Example prompts
- Check the Aegis installation for this host and tell me whether it needs an update.
- Update the Aegis Method Pack for the current host, then verify it with `aegis-doctor.py`.
- Prepare an update for every registered host using `--all` and show which installations will be affected.

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 05e64ad32d2ea4b8.

BEGIN THIRD-PARTY FILE 05e64ad32d2ea4b8
````text
---
name: update-aegis
description: "Use when the user says `aegis:update`, asks to update or upgrade an installed Aegis method-pack, wants the latest Aegis version, or asks whether Aegis is current on this host."
---

# Update Aegis

Update the installed Aegis Method Pack for the current AI coding host.

This skill is host maintenance. Do not edit the target project just because the
user asked to update Aegis.

## Default Semantics

- `aegis:update` updates the current host's registered Aegis installation.
- Updating every registered host requires an explicit `--all` request.
- If more than one host is registered and the current host cannot be identified,
  ask one concrete question before updating.
- Do not update a development checkout when the installed method-pack root is a
  separate path.
- Do not perform background automatic updates. The local registry may record
  `updateMode`, but this skill only performs explicit user-triggered updates.

## Evidence First

From the installed method-pack root, inspect the host-scoped registry:

```bash
python scripts/aegis-update.py status --json
```

If the registry is missing, register the current host before updating. Use the
host's install guide and actual discovery path rather than guessing.

If `~/.config/aegis/config.toml` already declares `method_pack_root`, prefer
that canonical root when registering additional hosts. Host-specific discovery
paths, copied skill directories, plugin caches, or adapter payloads should be
treated as generated / host-managed views into the same Aegis body, not as
separate editable checkouts.

Codex example:

```bash
python scripts/aegis-update.py register \
  --host codex \
  --sync-mode junction \
  --discovery-root ~/.agents/skills/aegis \
  --reload-hint "restart Codex"
```

Copy-based host example:

```bash
python scripts/aegis-update.py register \
  --host codebuddy \
  --sync-mode copy-skills \
  --discovery-root ~/.codebuddy/skills \
  --reload-hint "restart CodeBuddy"
```

Copy synchronization uses the installation registry's scoped file inventory.
It preserves unrelated files and local edits, and stops on conflicting writes
before changing the view. An identical legacy copy can be adopted; a differing
copy needs reconciliation or a separate discovery root. Unknown stale copies
are retained. Names and prefixes alone never prove ownership; do not delete
them to make verification pass.
Source names that collide under Unicode normalization/case folding are rejected
for portability. A case-only rename with changed contents can require moving
the conflicting file to a backup outside the discovery root, or selecting a
separate root. Preserve existing files during reconciliation.

Prefixed direct-child host example:

```bash
````
END THIRD-PARTY FILE 05e64ad32d2ea4b8

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