modernization-flow-implement

modernization-flow-implement is a command for coding agents from griddynamics/rosetta. It costs 13 tokens per session (1,064 once invoked), scanned A, original, Apache-2.0.

A guided implementation phase for updating older software after its target design has been approved. It requires preserving public interfaces, writing tests, and checking that the modernized code still matches the original requirements.

In plain words
What is it for?
Use it to implement approved modernization plans one project at a time, maintain compatibility for public APIs, add tests based on the old code, and validate the result against its specifications.
Why use it?
It gives a structured way to carry out modernization without losing existing users or behavior. It also makes testing and code-coverage checks part of the implementation work.

Command

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 commands/griddynamics/rosetta/modernization-flow-implement
Clone the repo
git clone --depth 1 https://github.com/griddynamics/rosetta

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 modernization-flow-implement

README.md
[![agentmods](https://agentmods.dev/badge/commands/griddynamics/rosetta/modernization-flow-implement.svg)](https://agentmods.dev/commands/griddynamics/rosetta/modernization-flow-implement)
Your own site
<a href="https://agentmods.dev/commands/griddynamics/rosetta/modernization-flow-implement"><img src="https://agentmods.dev/badge/commands/griddynamics/rosetta/modernization-flow-implement.svg" alt="Measured on agentmods" height="20"></a>
Per session 13 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,064 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00013 $0.01064
Opus 5 $0.00006 $0.00532
Sonnet 5 $0.00003 $0.00213
Haiku 4.5 $0.00001 $0.00106

Measured yesterday against content hash 92128bf41abd, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

modernization-flow-implement 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 yesterday.

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/core-copilot-light/commands/modernization-flow-implement.md · 129 lines

How it starts

The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Modernization Implementation Phase

Context

PREREQUISITES:

  • Complete Phase 7 (final cross-project review)
  • EXPLICIT HUMAN APPROVAL of all target specs

Requirements

  • MUST follow approved target specifications
  • MUST implement one project at a time (or per approved plan)
  • MUST maintain backward compatibility for public APIs
  • MUST write tests based on original code understanding
  • MUST validate against original specs
  • MUST achieve 80% minimum code coverage per project
  • MUST USE FLOW coding-flow.md for actual implementation

DOs AND DON'Ts FOR MODERNIZATION

DO:

  • DO analyze thoroughly before proposing changes
  • DO document all findings with evidence
  • DO call out unknowns and assumptions explicitly
  • DO create follow-up tasks for ambiguities
  • DO process each phase completely before moving to next
  • DO validate completeness at each checkpoint
  • DO maintain public API compatibility (or document changes)
  • DO adopt modern features where appropriate
  • DO leverage standard libraries and established packages
  • DO write comprehensive tests based on original behavior

DON'T:

  • DON'T skip phases or rush through analysis
  • DON'T generalize or assume - document facts only
  • DON'T provide code in specs - use interfaces and signatures
  • DON'T suggest solutions during analysis phase
  • DON'T break public APIs without explicit approval
  • DON'T implement before specs are approved
  • DON'T change requirements without approval
  • DON'T ignore edge cases from original code
  • DON'T simplify functionality without approval

EMPHASIS ON CRITICAL RULES

THESE RULES ARE COMMONLY IGNORED - PAY ATTENTION

  1. NO CODE IN SPECS - Use interfaces and method signatures only, NOT implementation code
  2. NO GENERALIZATION - Document facts only, not patterns or abstractions
  3. NO ASSUMPTIONS - Call out all assumptions explicitly
  4. EVIDENCE REQUIRED - All findings must reference actual code
  5. COMPLETE EACH PHASE - Do not skip or rush through phases
  6. VALIDATE CHECKPOINTS - Verify completeness before proceeding
  7. PUBLIC API COMPATIBILITY - Maintain or explicitly document changes
  8. PROCESS SEPARATELY - Each project is its own task

Read the full file on GitHub · 129 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. yesterday First seen · 129 lines · 13 tokens per session scan A 92128bf41abd

Subscribe to this mod's changes

modernization-flow-implement is a command published in the GitHub repository griddynamics/rosetta (342 stars, last pushed today), licensed Apache-2.0. It adds 13 tokens to every session and 1,064 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 2026-09-03.