eg-migration

eg-migration is a skill for Claude Code from SoliEstre/EstreGenesis. It costs 121 tokens per session (973 once invoked), scanned A, original, Apache-2.0.

A procedure for moving an existing project onto the EstreGenesis standard, a shared set of instructions for coding agents.

In plain words
What is it for?
Use it when adopting EstreGenesis in a project with existing agent instructions, including CLAUDE.md, AGENTS.md, or tool-specific rule files.
Why use it?
It audits the project's current rules before combining or promoting them, reducing the risk of losing important conventions.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions CLAUDE.md; mentions AGENTS.md; mentions Gemini CLI.

Part of the estregenesis plugin — 13 skills shipped together

Good fit Use it when adopting EstreGenesis in a project with existing agent instructions, including CLAUDE.md, AGENTS.md, or tool-specific rule files.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/soliestre/estregenesis/eg-migration
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 SoliEstre/EstreGenesis --skill eg-migration
Clone the repo
git clone --depth 1 https://github.com/SoliEstre/EstreGenesis

Made for: Claude Code.

Or install estregenesis, the plugin that ships this one along with the rest of its 13 skills.

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 eg-migration

README.md
[![agentmods](https://agentmods.dev/badge/skills/soliestre/estregenesis/eg-migration/github.svg)](https://agentmods.dev/skills/soliestre/estregenesis/eg-migration)
Your own site
<a href="https://agentmods.dev/skills/soliestre/estregenesis/eg-migration"><img src="https://agentmods.dev/badge/skills/soliestre/estregenesis/eg-migration/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 eg-migration

Your own site · 80×15
<a href="https://agentmods.dev/skills/soliestre/estregenesis/eg-migration"><img src="https://agentmods.dev/badge/skills/soliestre/estregenesis/eg-migration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 121 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 973 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 $0.00121 $0.00973
Opus 5 $0.00060 $0.00487
Sonnet 5 $0.00024 $0.00195
Haiku 4.5 $0.00012 $0.00097

Measured 9d ago against content hash 8913104db5c3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

eg-migration 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 9d 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.

plugins/estregenesis/skills/eg-migration/SKILL.md · 59 lines

How it starts

The opening of the file, as written. The whole thing — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/eg-migration (/egmig) — bring an existing project onto the EG standard

Migration modes M1 (Migration A) and M3 (Migration C) of the seed. Additive by construction: the project's existing rules are extracted and promoted, never bulldozed.

0. Audit first, classify second

Inventory what the project actually has — do not guess:

AGENTS.md · CLAUDE.md · GEMINI.md · .cursor/rules/ · .github/copilot-instructions.md
.windsurfrules · .clinerules · .agent/ · .claude/ (settings, skills, hooks)

Then classify:

Finding Mode Route
.agent/seed_prompt.md present (any version) M2 Stop — this is an upgrade, not a migration → /eg-upgrade
Rule files exist, but no AGENTS.md acting as SSoT M1 Seed's Migration A — continue
An AGENTS.md exists but co-exists with divergent per-tool rules, or the project has heavy custom conventions worth keeping M3 Seed's Migration C (hybrid) — continue
No rule files at all /eg-bootstrap

State the mode and the evidence for it in one line before touching anything.

1. Fetch the seed

Same tier table as /eg-bootstrap — default Lite, user's prevailing language. One tier per repo.

Base: https://raw.githubusercontent.com/SoliEstre/EstreGenesis/main/

Tier English 한국어
Master AI_Native_Project_Master_Seed_Prompt.md AI_Native_프로젝트_마스터_시드_프롬프트.md
Lite AI_Native_Project_Seed_Prompt_Lite.md AI_Native_프로젝트_시드_프롬프트_Lite.md
Compact AI_Native_Project_Seed_Prompt_Compact.md AI_Native_프로젝트_시드_프롬프트_Compact.md

Write it verbatim to .agent/seed_prompt.md, header marker intact (that marker is what /eg-upgrade diffs later).

2. Run the seed's migration section

Read .agent/seed_prompt.md and execute Migration A (M1) or Migration C (M3). The seed owns the procedure — follow it rather than re-deriving it. The invariants it enforces, and the reason they matter here:

  • Extract, don't discard. Every existing rule becomes either a line in AGENTS.md (it was a real project rule) or a deliberate drop recorded with its reason (it was tool-specific noise). Nothing evaporates silently.
  • AGENTS.md becomes the SSoT. Per-tool files (CLAUDE.md, .cursor/rules/*, …) are rewritten as thin bridges that import it — that is what ends the rule-file drift the project came here to fix.
  • Custom conventions survive (M3). A hybrid project keeps its own conventions; the seed layers structure around them instead of replacing them.

Read the full file on GitHub · 59 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. 9d ago First seen · 59 lines · 121 tokens per session scan A 8913104db5c3

Subscribe to this mod's changes

eg-migration is a skill published in the GitHub repository SoliEstre/EstreGenesis (8 stars, last pushed 3d ago), licensed Apache-2.0. It adds 121 tokens to every session and 973 once invoked, about $0.0006 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 2026-08-31.

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