migration-analysis

migration-analysis is a skill for Claude Code, Codex from PlamenTSV/plamen. It costs 43 tokens per session (3,517 once invoked), scanned A, original, MIT.

An Aptos smart-contract review for upgrades and migrations, such as moving from an older token system to a newer one. Aptos is a blockchain platform whose deployed modules can be upgraded under certain rules.

In plain words
What is it for?
It detects migration patterns, reviews token transitions, checks upgrade-policy and storage compatibility, and examines whether old and new interfaces can work together.
Why use it?
It helps reveal stranded assets, incompatible interfaces, and unsafe changes to persistent contract data during an upgrade.

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/plamentsv/plamen/migration-analysis
Any agent
npx skills add PlamenTSV/plamen --skill migration-analysis
Clone the repo
git clone --depth 1 https://github.com/PlamenTSV/plamen

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 migration-analysis

README.md
[![agentmods](https://agentmods.dev/badge/skills/plamentsv/plamen/migration-analysis.svg)](https://agentmods.dev/skills/plamentsv/plamen/migration-analysis)
Your own site
<a href="https://agentmods.dev/skills/plamentsv/plamen/migration-analysis"><img src="https://agentmods.dev/badge/skills/plamentsv/plamen/migration-analysis.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,517 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 $0.00043 $0.03517
Opus 5 $0.00022 $0.01758
Sonnet 5 $0.00009 $0.00703
Haiku 4.5 $0.00004 $0.00352

Measured 4d ago against content hash c9b5fe47d409, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

migration-analysis 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 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.

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/aptos/migration-analysis/SKILL.md · 311 lines

How it starts

The opening of the file, as written. The whole thing — 311 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill: MIGRATION_ANALYSIS

Trigger: Protocol has migration patterns (reinitialize, V2/V3, deprecated, upgrade, legacy, Coin-to-FA) Covers: Token type mismatches, stranded assets, interface incompatibilities, module upgrade safety Required: YES when MIGRATION flag detected

Aptos Migration Context

Aptos modules are upgradeable by default under the compatible upgrade policy. Key differences from EVM:

  • Module upgrades are in-place (same address, same module name)
  • Resources in global storage persist across upgrades unchanged
  • New functions can be added; existing public function signatures must remain compatible
  • Storage layout must be compatible: new fields only at end of structs, existing fields unchanged
  • immutable policy freezes module permanently; compatible allows additive changes
  • The Coin<T> to FungibleAsset migration is a major ecosystem-wide transition

Trigger Patterns

V2|V3|_deprecated|migrat|upgrade|legacy|old_token|new_token|coin_to_fungible|fungible_asset_to_coin|reinitialize

Reasoning Template

Step 1: Identify Token Transitions

Find all token migration patterns:

  • Coin<T> to FungibleAsset migration (ecosystem-wide)
  • Legacy module interfaces still referenced
  • Deprecated functions still callable
  • V1 -> V2 module patterns within the protocol

For each transition:

Old Standard/Type New Standard/Type Migration Function Bidirectional? Framework Support?
Coin FungibleAsset coin::coin_to_fungible_asset YES (coin::fungible_asset_to_coin) aptos_framework
ModuleV1::Resource ModuleV2::Resource custom migrate() {YES/NO} N/A

Step 2: Check Interface Compatibility

For each external call that involves migrated tokens or upgraded modules:

  1. What type does the CALLER expect? (Coin<T> or FungibleAsset or Object<Metadata>)
  2. What type does the CALLEE actually return/accept?
  3. Are they the same?
  4. Has the external module upgraded to use a different standard?

Read the full file on GitHub · 311 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. 4d ago First seen · 311 lines · 43 tokens per session scan A c9b5fe47d409

Subscribe to this mod's changes

migration-analysis is a skill published in the GitHub repository PlamenTSV/plamen (281 stars, last pushed 1mo ago), licensed MIT. It adds 43 tokens to every session and 3,517 once invoked, about $0.0002 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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