update-ported-plugin

A workflow for updating a plugin that was previously moved to another platform when its source or the target platform changes.

In plain words
What is it for?
Use it to load migration context, detect source and platform changes, update the port, validate the result, and refresh its migration records.
Why use it?
It identifies differences from the original migration and applies focused updates instead of repeating the entire porting process.

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/sequenzia/agent-alchemy/update-ported-plugin
Any agent
npx skills add sequenzia/agent-alchemy --skill update-ported-plugin
Clone the repo
git clone --depth 1 https://github.com/sequenzia/agent-alchemy

Made for: Claude Code, Codex.

Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,228 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 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 $0.00019 $0.07228
Opus 5 $0.00010 $0.03614
Sonnet 5 $0.00004 $0.01446
Haiku 4.5 $0.00002 $0.00723

Measured 2d ago against content hash 758312c0627a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

update-ported-plugin 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 2d 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.

claude/plugin-tools/skills/update-ported-plugin/SKILL.md · 792 lines

How it starts

The opening of the file, as written. The whole thing — 792 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Update Ported Plugin

Apply incremental updates to previously-ported plugins when source plugins have changed or the target platform has evolved. Reads the PORT-METADATA embedded in MIGRATION-GUIDE.md to determine the baseline, detects source diffs and platform drift, and applies targeted updates without re-running the full port-plugin workflow.

CRITICAL: Complete ALL 5 phases. The workflow is not complete until Phase 5: Output & Refresh is finished. After completing each phase, immediately proceed to the next phase without waiting for user prompts.

Critical Rules

AskUserQuestion is MANDATORY

IMPORTANT: You MUST use the AskUserQuestion tool for ALL questions to the user. Never ask questions through regular text output. Text output is only for status updates and informational summaries.

Plan Mode Behavior

CRITICAL: This skill performs an interactive update workflow, NOT an implementation plan. Proceed with the full detection and update workflow immediately -- do not defer to an "execution phase".

Phase Overview

Execute these phases in order, completing ALL of them:

  1. Load Context -- Parse arguments, locate MIGRATION-GUIDE.md, extract and validate PORT-METADATA
  2. Detect Changes -- Diff source files against baseline commit, check platform adapter staleness
  3. Apply Source Changes -- Incrementally update ported files for source modifications
  4. Apply Platform Changes -- Update ported files for platform adapter drift
  5. Output & Refresh -- Write files, refresh metadata, update history, and summarize

Phase 1: Load Context

Goal: Parse arguments, locate the MIGRATION-GUIDE.md from a previous port, extract the PORT-METADATA block, and validate that the baseline is intact.

Step 1: Parse Arguments

Parse $ARGUMENTS for:

  • --target <platform> -- Target platform slug (default: opencode)
  • --source-only -- Only detect and apply source changes; skip platform change detection
  • --platform-only -- Only detect and apply platform changes; skip source change detection
  • --output-dir <path> -- Override output directory for updated files (default: write in-place)

Read the full file on GitHub · 792 lines

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. 2d ago First seen · 792 lines · 19 tokens per session scan A 758312c0627a

Subscribe to this mod's changes

update-ported-plugin is a skill published in the GitHub repository sequenzia/agent-alchemy (43 stars, last pushed 3mo ago), licensed MIT. It adds 19 tokens to every session and 7,228 once invoked, about $0.0001 per session on Opus 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.

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