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[NixOS] Add bump-overlay-versions skill to repo

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Move skill from global ~/.claude/skills to project-local .claude/skills
so it's version controlled with the dotfiles.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Ivan Malison
2026-01-29 11:57:11 -08:00
parent 595dc39945
commit 50fc48ec36
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---
name: bump-overlay-versions
description: Use when user asks to bump, update, or upgrade claude-code or codex versions in overlay.nix, or when checking if newer versions are available
---
# Bump Overlay Versions
## Overview
Updates claude-code and/or codex to latest versions in `~/dotfiles/nixos/overlay.nix`. Nix requires correct hashes which must be discovered through failed builds.
## Quick Reference
| Package | Check Latest | Hash Fields |
|---------|--------------|-------------|
| claude-code | `npm view @anthropic-ai/claude-code version` | `hash`, `npmDepsHash` (keep empty) |
| codex | `curl -s "https://api.github.com/repos/openai/codex/releases/latest" \| jq -r '.tag_name'` | `hash`, `cargoHash` |
## Workflow
### 1. Check Current vs Latest Versions
```bash
# Current versions are in overlay.nix claudeCodeVersion and codexVersion blocks
# Check latest:
npm view @anthropic-ai/claude-code version
curl -s "https://api.github.com/repos/openai/codex/releases/latest" | jq -r '.tag_name'
# codex tag format: rust-v0.92.0 -> version is 0.92.0
```
### 2. Update Version and Clear Hashes
In `~/dotfiles/nixos/overlay.nix`:
**For claude-code:**
```nix
claudeCodeVersion = {
version = "X.Y.Z"; # Update to new version
hash = ""; # Clear - will get from build error
npmDepsHash = ""; # Keep empty (no npm deps)
};
```
**For codex:**
```nix
codexVersion = {
version = "X.Y.Z"; # Update to new version (without rust-v prefix)
hash = ""; # Clear - will get from build error
cargoHash = ""; # Clear - will get from build error
};
```
### 3. Build to Get Hashes
```bash
just switch
```
The build will fail with hash mismatch errors showing the correct hash. Copy the `got:` hash value.
**For codex:** You'll need to run twice - once for `hash` (source), once for `cargoHash` (cargo deps).
### 4. Update with Correct Hashes
Replace empty strings with the hashes from build errors, then run `just switch` again.
## Enable/Disable Overrides
The overlay uses boolean flags - set to `false` to use nixpkgs versions instead:
```nix
enableCodexOverride = true; # Set false to use nixpkgs codex
enableClaudeCodeOverride = true; # Set false to use nixpkgs claude-code
```
**Never delete the override code** - just toggle the flags.
## File Location
`~/dotfiles/nixos/overlay.nix`