retroactive-instantiation

retroactive-instantiation is a skill for Claude Code, Codex from Sistema2D/FrameCode-VibeWork. It costs 18 tokens per session (877 once invoked), scanned A, original, Apache-2.0.

A procedure for adopting the FrameCode VibeWork framework in an existing or older application without rewriting its history.

In plain words
What is it for?
Use it when retrofitting governance into a legacy or partially structured project, or when migrating an older or incomplete FCVW setup.
Why use it?
It separates the project's existing facts and past decisions from the framework's new rules, reducing the risk of destructive migration.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions AGENTS.md.

Good fit Use it when retrofitting governance into a legacy or partially structured project, or when migrating an older or incomplete FCVW setup.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sistema2d/framecode-vibework/retroactive-instantiation
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 Sistema2D/FrameCode-VibeWork --skill retroactive-instantiation
Clone the repo
git clone --depth 1 https://github.com/Sistema2D/FrameCode-VibeWork

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 retroactive-instantiation

README.md
[![agentmods](https://agentmods.dev/badge/skills/sistema2d/framecode-vibework/retroactive-instantiation.svg)](https://agentmods.dev/skills/sistema2d/framecode-vibework/retroactive-instantiation)
Your own site
<a href="https://agentmods.dev/skills/sistema2d/framecode-vibework/retroactive-instantiation"><img src="https://agentmods.dev/badge/skills/sistema2d/framecode-vibework/retroactive-instantiation.svg" alt="Measured on agentmods" height="20"></a>
Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 877 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 warn 7 Sept 2026
SkillSpector: 2 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Agent Snooping · line 53
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
  • medium Agent Snooping · line 54
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 $0.00018 $0.00877
Opus 5 $0.00009 $0.00439
Sonnet 5 $0.00004 $0.00175
Haiku 4.5 $0.00002 $0.00088

Measured 8d ago against content hash 3cc3c5a0939d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

retroactive-instantiation 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 8d 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.

FCVW/skills/retroactive-instantiation/SKILL.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SKILL: Retroactive Instantiation

High-density activation guide for adopting FrameCode VibeWork inside an existing, advanced, legacy, or partially governed application.

Purpose

Adopt FCVW non-destructively in an existing application, separating observed project truth from framework policy and from pre-adoption history.

Activation Triggers

Load this skill when:

  • the user asks for retroactive FCVW adoption in an existing application;
  • the repository already contains application code before FCVW is installed;
  • an older or partial FCVW/ structure must be migrated forward;
  • the task mentions "instanciação retroativa", "adotar FCVW", "migrar framework antigo", "legacy app", "advanced app", or "governance retrofit".

Use project-instantiation instead for blank or fresh Phase 0 projects.

Mandatory Source of Truth

Read and follow FCVW/RETROACTIVE_INSTANTIATION.md.

This skill is only the JIT trigger and compact checklist. Do not duplicate or override the canonical workflow.

Inputs

Existing repository and history, current application documentation, RETROACTIVE_INSTANTIATION.md, OWNERSHIP.md, framework lock and migration, project authority, and baseline build/test/deploy evidence.

Execution Checklist

  1. Read AGENTS.md, FCVW/RETROACTIVE_INSTANTIATION.md, and FCVW/CONTEXT_MAP.md.
  2. Inspect the current repository and classify it:
    • Case A: no FCVW present;
    • Case B: older FCVW present;
    • Case C: partial or inconsistent FCVW present.
  3. Create or update FCVW/Plans/in_progress/P2-R4-{date}-retroactive-instantiation.md.
  4. Preserve application files first: source code, root README, runtime configs, data, tests, deployment files, and existing docs.
  5. Load skills/code-hygiene-refactor/SKILL.md and record a non-destructive hygiene triage: duplicates, stale files, dead code candidates, catch-all modules, and monolith candidates.
  6. Load skills/anti-monolith-guard/SKILL.md for every identified monolith that will receive new changes.
  7. Import, repair, or migrate FCVW under FCVW/ using non-destructive merges.
  8. Fill project documents from evidence; use To be defined for missing facts.
  9. Preserve historical plans, changelogs, troubleshooting records, decisions, audits, and wiki pages.
  10. Add a changelog fragment and validation evidence; regenerate filesystem paths when changed, and create wiki/session records only when their promotion or handoff criteria are met.
  11. Run safe local tests and structural checks; record limitations instead of inventing results.
  12. Move the plan to the final status folder only after validation is recorded.

Read the full file on GitHub · 79 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. 8d ago First seen · 79 lines · 18 tokens per session scan A 3cc3c5a0939d

Subscribe to this mod's changes

retroactive-instantiation is a skill published in the GitHub repository Sistema2D/FrameCode-VibeWork (23 stars, last pushed 7d ago), licensed Apache-2.0. It adds 18 tokens to every session and 877 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.