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speckit-updater

speckit-updater is a skill for Claude Code from NotMyself/claude-win11-speckit-update-skill. It costs 0 tokens per session (1,919 once invoked), scanned A, original, MIT.

A maintenance tool for safely updating GitHub SpecKit installations while preserving project customizations.

In plain words
What is it for?
It is for checking, approving, applying, and rolling back SpecKit updates in a project.
Why use it?
It helps avoid losing local changes when applying newer SpecKit templates and can show conflicts, backups, and files that would change.

Skill for Claude Code

Written for Claude Code: Claude Code plugin machinery. Also seen: mentions Claude Code.

Part of the speckit-updater plugin — 1 skill, 8 commands shipped together

not rated 30repo 10mo ago A scan 0 tokens original MIT archived

Good fit It is for checking, approving, applying, and rolling back SpecKit updates in a project.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/notmyself/claude-win11-speckit-update-skill/speckit-updater
View source ↗ NotMyself/claude-win11-speckit-update-skill
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.

Any agent
npx skills add NotMyself/claude-win11-speckit-update-skill --skill speckit-updater
Clone the repo
git clone --depth 1 https://github.com/NotMyself/claude-win11-speckit-update-skill

Made for: Claude Code.

Or install speckit-updater, the plugin that ships this one along with the rest of its 1 skill, 8 commands.

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 speckit-updater

README.md
[![agentmods](https://agentmods.dev/badge/skills/notmyself/claude-win11-speckit-update-skill/speckit-updater/github.svg)](https://agentmods.dev/skills/notmyself/claude-win11-speckit-update-skill/speckit-updater)
Your own site
<a href="https://agentmods.dev/skills/notmyself/claude-win11-speckit-update-skill/speckit-updater"><img src="https://agentmods.dev/badge/skills/notmyself/claude-win11-speckit-update-skill/speckit-updater/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 speckit-updater

Your own site · 80×15
<a href="https://agentmods.dev/skills/notmyself/claude-win11-speckit-update-skill/speckit-updater"><img src="https://agentmods.dev/badge/skills/notmyself/claude-win11-speckit-update-skill/speckit-updater.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,919 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.
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 $0.00000 $0.01919
Opus 5 $0.00000 $0.00959
Sonnet 5 $0.00000 $0.00384
Haiku 4.5 $0.00000 $0.00192

Measured 12d ago against content hash 1e17755dfd56, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

speckit-updater 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 12d ago.

The scan reads SKILL.md. This mod also ships 9 executable files (scripts/generate-fingerprints.ps1, scripts/helpers/Get-UpdateConfirmation.ps1, scripts/helpers/Invoke-ConflictResolutionWorkflow.ps1, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

skills/speckit-updater/SKILL.md · 161 lines

How it starts

The opening of the file, as written. The whole thing — 161 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SpecKit Safe Update

This skill provides safe update capabilities for GitHub SpecKit installations, preserving customizations while applying template updates.

Installation: Available via plugin (/plugin marketplace add NotMyself/claude-plugins then /plugin install speckit-updater) or manual Git clone. See README.md for details.

What to do when this skill is invoked

When the user invokes /speckit-updater, you should:

  1. Run the update orchestrator script without any flags (conversational mode):

    pwsh -NoProfile -Command "& 'C:\Users\bobby\.claude\skills\speckit-updater\scripts\update-wrapper.ps1'"

  2. Parse the output for markers:

    • [PROMPT_FOR_APPROVAL] - Update scenario (existing SpecKit installation)
    • [PROMPT_FOR_INSTALL] - Fresh installation scenario (no .specify/ directory)

  3. For Updates ([PROMPT_FOR_APPROVAL] marker found):

    • Present the Markdown summary showing:
      • Current version vs. available version
      • Files to update/add/remove
      • Conflicts detected (if any)
      • Files preserved (customized)
      • Backup location
      • Custom commands
    • Ask the user for approval to proceed with the update
    • If approved, re-run with -Proceed flag
    • If declined, inform the user the update was cancelled

  4. For Fresh Installations ([PROMPT_FOR_INSTALL] marker found):

    • Present a natural installation offer to the user, such as:
      • "SpecKit is not currently installed in this project. Would you like me to install it?"
      • "I can install the latest SpecKit templates for you. This will create the .specify/ directory structure and download the templates from GitHub."
    • Do NOT mention the -Proceed flag to the user (this is an implementation detail)
    • If user approves (says "yes", "proceed", "install it", etc.), re-run with -Proceed flag
    • If user declines, inform them the installation was cancelled

Read the full file on GitHub · 161 lines

Files

What ships with it

60 files 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. 12d ago First seen · 161 lines · 0 tokens per session scan A 1e17755dfd56

Subscribe to this mod's changes

speckit-updater is a skill published in the GitHub repository NotMyself/claude-win11-speckit-update-skill (30 stars, last pushed 10mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,919 tokens. 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.

Building agentsClaude Codepowershellspeckitwindows-11
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