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.
npx skills add ivegamsft/basecoat --skill cross-stack-modernizationgit clone --depth 1 https://github.com/ivegamsft/basecoatWrote 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.
[](https://agentmods.dev/skills/ivegamsft/basecoat/cross-stack-modernization)<a href="https://agentmods.dev/skills/ivegamsft/basecoat/cross-stack-modernization"><img src="https://agentmods.dev/badge/skills/ivegamsft/basecoat/cross-stack-modernization/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.
<a href="https://agentmods.dev/skills/ivegamsft/basecoat/cross-stack-modernization"><img src="https://agentmods.dev/badge/skills/ivegamsft/basecoat/cross-stack-modernization.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00089 | $0.00318 |
| Opus 5 | $0.00044 | $0.00159 |
| Sonnet 5 | $0.00018 | $0.00064 |
| Haiku 4.5 | $0.00009 | $0.00032 |
Grade A, and why
cross-stack-modernization 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 5d 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.
What it actually says
Cross-Stack Modernization
Language-agnostic patterns for incrementally modernizing legacy applications: strangler fig, anti-corruption layer (ACL), risk scoring, and dependency extraction sequencing.
Reference Files
| File | Contents |
|---|---|
references/workflow.md |
Decision matrix, strangler fig steps, ACL pattern, DB-first vs UI-first, risk scoring, extraction sequencing |
references/examples.md |
Risk scoring example, nginx strangler fig routing, TypeScript ACL adapter |
Strategy Decision (Quick Reference)
| Criterion | Refactor | Strangler fig | Full rewrite |
|---|---|---|---|
| Test coverage | > 60 % | 30–60 % | < 30 % |
| Time horizon | Weeks | Months | Quarters |
| Risk tolerance | Low | Medium | High |
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 5d ago First seen · 32 lines · 89 tokens per session scan A f4b7d7d838f6
cross-stack-modernization is a skill published in the GitHub repository ivegamsft/basecoat (4 stars, last pushed today), licensed MIT. It adds 89 tokens to every session and 318 once invoked, about $0.0004 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.
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