vc-update

vc-update is a skill for Claude Code, Codex from withkynam/vibecode-pro-max-kit. It costs 29 tokens per session (6,307 once invoked), scanned D, original, MIT.

A guided updater for an agent-development toolkit that checks the current project, previews remote changes, and can apply an approved update.

In plain words
What is it for?
Use it to check for a newer harness version, review a dry-run summary, and update the local toolkit after confirmation.
Why use it?
It makes toolkit updates easier to inspect and helps reveal uncommitted work before files are changed.

Skill for Claude CodeCodex

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/withkynam/vibecode-pro-max-kit/vc-update
Any agent
npx skills add withkynam/vibecode-pro-max-kit --skill vc-update
Clone the repo
git clone --depth 1 https://github.com/withkynam/vibecode-pro-max-kit

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.

agentmods badge for vc-update

README.md
[![agentmods](https://agentmods.dev/badge/skills/withkynam/vibecode-pro-max-kit/vc-update.svg)](https://agentmods.dev/skills/withkynam/vibecode-pro-max-kit/vc-update)
Your own site
<a href="https://agentmods.dev/skills/withkynam/vibecode-pro-max-kit/vc-update"><img src="https://agentmods.dev/badge/skills/withkynam/vibecode-pro-max-kit/vc-update.svg" alt="Measured on agentmods" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,307 The whole file, excluding the scripts and references it only reads on demand.
Security scan D 2 findings. 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.

ModelPer sessionOnce invoked
Fable 5 $0.00029 $0.06307
Opus 5 $0.00015 $0.03154
Sonnet 5 $0.00006 $0.01261
Haiku 4.5 $0.00003 $0.00631

Measured 4d ago against content hash 0761f31bb034, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade D, and why

vc-update scanned grade D with 2 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 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

or diff .claude/settings.json .vibecode-backup/.claude/settings.json

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

- If a real directory exists at the path: `rm -rf` it first.
.claude/skills/vc-update/SKILL.md · 443 lines

How it starts

The opening of the file, as written. The whole thing — 443 lines — stays where its author put it; the contents beside it link to each section on GitHub.

vc-update

Output style: Follow process/development-protocols/communication-standards.md — answer-first, plain language, no unexplained jargon, TL;DR on long responses.

Pull the latest agent harness improvements from the remote vibecode-pro-max-kit repository into the current project.

When to Use

  • After being told a new harness version is available
  • Periodically to check for updates
  • After bootstrapping a project with vc-setup and wanting the latest improvements

Workflow

Follow these steps exactly. Do NOT skip the dry-run or confirmation step.

Step 1: Check Worktree Status

Run git status --porcelain in the project root.

  • If output is non-empty: warn the user that they have uncommitted changes and suggest git stash or committing first. Do not block -- continue after warning.
  • If output is empty: proceed silently.

Step 2: Read Current Version

Read the file .vc-version in the project root.

  • If it exists: store its contents as currentVersion (a semver string like 2.0.4).
  • If it does not exist: set currentVersion to "0.0.0" (treat as first update).

Step 3: Clone Remote Repository

# Respect VC_KIT_SOURCE override (local path or alternate URL).
# When unset, defaults to the official remote.
KIT_SOURCE="${VC_KIT_SOURCE:-https://github.com/withkynam/vibecode-pro-max-kit.git}"
VC_UPDATE_TMPDIR="/tmp/vc-update-$(date +%s)"
git clone --local --depth 1 --quiet "$KIT_SOURCE" "$VC_UPDATE_TMPDIR" 2>/dev/null \
  || git clone --depth 1 --quiet "$KIT_SOURCE" "$VC_UPDATE_TMPDIR"
# Note: --local is a no-op for remote URLs (git ignores it); the fallback covers all cases.

VC_KIT_SOURCE — if set, use this path or URL instead of the official remote. Accepts any value accepted by git clone. This enables offline testing (VC_KIT_SOURCE=/path/to/local/kit) and forks/pinned versions.

If the clone fails (network error, auth error, repo not found):

  • Print the error message.
  • Clean up the temp directory if it was partially created.
  • Stop. Do not proceed.

Read the full file on GitHub · 443 lines

Files

What ships with it

1 file 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.

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.

  1. 4d ago First seen · 443 lines · 29 tokens per session scan D 0761f31bb034

Subscribe to this mod's changes

vc-update is a skill published in the GitHub repository withkynam/vibecode-pro-max-kit (1,115 stars, last pushed 2mo ago), licensed MIT. It adds 29 tokens to every session and 6,307 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it D with 2 findings (reads agent configuration directories, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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