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mcpc: Skill for Claude Code

.agents/skills/version-upgrade/SKILL.md

version-upgrade is a skill for Claude Code, Codex from mcpc-tech/mcpc. It costs 33 tokens per session (423 once invoked), scanned A, original, MIT.

A workflow for upgrading mcpc package versions and synchronizing the dependencies between those packages. It also updates the command-line interface version in the source code.

In plain words
What is it for?
It helps read and bump package versions, update dependent references, change the CLI version constant, and run Deno lint and tests.
Why use it?
It prevents version references from falling out of sync across a multi-package project. It also adds linting and tests to check the upgrade.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is mcpc-tech/mcpc's own configuration. It tells Claude Code and Codex how to work on mcpc itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcpc configures →

not rated 105repo +1 1mo ago A scan SkillSpector: pass 33 tokens original MIT
View source ↗ mcpc-tech/mcpc
Reuse

Borrowing it

Nothing to install: this file belongs to mcpc-tech/mcpc. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/mcpc-tech/mcpc/main/.agents/skills/version-upgrade/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/mcpc-tech/mcpc

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 version-upgrade

README.md
[![agentmods](https://agentmods.dev/badge/skills/mcpc-tech/mcpc/version-upgrade/github.svg)](https://agentmods.dev/skills/mcpc-tech/mcpc/version-upgrade)
Your own site
<a href="https://agentmods.dev/skills/mcpc-tech/mcpc/version-upgrade"><img src="https://agentmods.dev/badge/skills/mcpc-tech/mcpc/version-upgrade/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.

agentmods 80×15 button for version-upgrade

Your own site · 80×15
<a href="https://agentmods.dev/skills/mcpc-tech/mcpc/version-upgrade"><img src="https://agentmods.dev/badge/skills/mcpc-tech/mcpc/version-upgrade.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 423 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 5.1 $0.00033 $0.00423
Opus 5.5 $0.00013 $0.00169
Sonnet 5.5 $0.00007 $0.00085
Haiku 4.5 $0.00003 $0.00042

Measured 2mo ago against content hash 8be183ce3a52, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

version-upgrade scanned grade A with 0 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 2mo 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/version-upgrade/SKILL.md · 69 lines

What it actually says

Version Upgrade Skill

Upgrade mcpc package versions and their dependencies.

When to Use

User asks to upgrade versions, like:

  • "upgrade core version"
  • "upgrade all packages"
  • "bump versions"

Steps

1. Read Current Versions

Read each packages/*/deno.json to find current versions.

  • Core is the base - upgrade it first
  • Other packages depend on core

2. Increment Version

For each package:

  • Increment the appropriate segment (patch/minor/major)
  • Match the pattern: if core goes 0.3.38 → 0.3.39, dependents should reference ^0.3.39

3. Sync CLI Version

If CLI is updated:

  • Find CLI_VERSION in packages/cli/src/config/loader.ts
  • Update to match cli deno.json version

4. Verify

deno lint
deno test --allow-all packages/*/tests/

Version Patterns

Type Pattern When
Core 0.3.x Feature additions
CLI 0.1.x Feature additions
Utils 0.2.x Feature additions
Plugins 0.0.x Patch=fix, Minor=feature

Key Files to Update

  • packages/core/deno.json - base version
  • packages/*/deno.json - each package's version + core dependency
  • packages/cli/src/config/loader.ts - CLI_VERSION constant

Tips

  • Always upgrade core first, then dependents
  • Check for dependency warnings with deno lint
  • Update CLI_VERSION to match deno.json version
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. 2mo ago First seen · 69 lines · 33 tokens per session scan A 8be183ce3a52

Subscribe to this mod's changes

version-upgrade is a skill published in the GitHub repository mcpc-tech/mcpc (105 stars, last pushed 1mo ago), licensed MIT. It adds 33 tokens to every session and 423 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Git and workflowagentic-mcpcode-mode-mcpmcp-composemcp-servermcpc
Related

version-upgrade compared with skills from other repositories

version-upgrade next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
version-upgrademcpc-tech/mcpcSkill1051mo agoMITA33Claude Code, Codex
polish-docs-metacyanheads/git-mcp-serverSkill2451mo agoApache-2.0A53Claude Code, Codex
github-via-nyxidChronoAIProject/NyxIDSkill41yesterdayApache-2.0A116Claude Code
git-workflowmodelcontextprotocol/csharp-sdkSkill4.6kyesterdaynoneA19Claude Code, Codex
p4-stream-workflowsperforce/p4mcp-serverSkill1244d agoMITA0Claude Code, Codex
p4-workspace-setupperforce/p4mcp-serverSkill1244d agoMITA0Claude Code, Codex
hmem-releaseBumblebiber/hmemSkill246d agoMITA50Claude Code