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 fubits1/svelte-skills --skill migration-svelte-5git clone --depth 1 https://github.com/fubits1/svelte-skillsWrote 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/fubits1/svelte-skills/migration-svelte-5)<a href="https://agentmods.dev/skills/fubits1/svelte-skills/migration-svelte-5"><img src="https://agentmods.dev/badge/skills/fubits1/svelte-skills/migration-svelte-5/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/fubits1/svelte-skills/migration-svelte-5"><img src="https://agentmods.dev/badge/skills/fubits1/svelte-skills/migration-svelte-5.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 | $0.00065 | $0.03336 |
| Opus 5.5 | $0.00026 | $0.01334 |
| Sonnet 5.5 | $0.00013 | $0.00667 |
| Haiku 4.5 | $0.00006 | $0.00334 |
Grade A, and why
migration-svelte-5 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 11d 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.
How it starts
The opening of the file, as written. The whole thing — 321 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Svelte 3/4 to 5 Migration
Authoritative reference: the official Svelte 5 migration guide is the canonical list of breaking changes and gotchas (components are no longer classes → mount/hydrate; $effect is client-only; event-modifier limits; and the rest). This skill is the migration WORKFLOW — order, audit, interop, traps; defer to the guide for the full what-changed.
Required companion skills
Invoke these at the indicated points. This skill says WHEN; they say HOW.
| Skill | When | Source |
|---|---|---|
svelte:svelte-code-writer |
Before writing/editing ANY .svelte or .svelte.ts |
plugin: svelte@svelte |
svelte:svelte-core-bestpractices |
Before writing ANY Svelte 5 component logic | plugin: svelte@svelte |
svelte-5:code-style-svelte |
Before and after every .svelte file edit |
this marketplace |
frontend:code-style |
Before and after every file edit | this marketplace |
frontend:editing |
Before and during every code edit | this marketplace |
frontend:comments |
Before and after every code edit | this marketplace |
svelte-5:doc-component |
After creating or migrating a .svelte component |
this marketplace |
svelte-5:storybook |
When creating/updating stories | this marketplace |
svelte-5:storybook-vitest |
When writing play functions | this marketplace |
svelte-5:testing-svelte |
When writing vitest browser tests | this marketplace |
frontend:playwright |
Before AND after migration (baselines + verification) | this marketplace |
frontend:pixel-perfect |
For any CSS/layout changes during migration | this marketplace |
frontend:validate-file |
After EVERY file edit | this marketplace |
frontend:migration |
Framework-agnostic phases this skill builds on | this marketplace |
Prefer delegating each .svelte create/edit/review to the svelte:svelte-file-editor subagent (plugin svelte@svelte). It runs in its own context window, so its docs lookup and autofixer iteration don't spend the main agent's context during a long migration. The companion skills above still say WHEN; the subagent is where the per-file edit happens. Tell it to invoke frontend:editing and the sub-skills it requires.
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.
- 11d ago Changed 0ad7ea94c6ef
- 12d ago Changed · +10 lines 13aaf807459e
- 2mo ago First seen · 311 lines · 65 tokens per session scan A 1fe4874f518a
migration-svelte-5 is a skill published in the GitHub repository fubits1/svelte-skills (10 stars, last pushed 12d ago), licensed MIT. It adds 65 tokens to every session and 3,336 once invoked, about $0.0003 per session on Opus 5.5. 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.
migration-svelte-5 compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| migration-svelte-5fubits1/svelte-skills | Skill | 10 | 12d ago | MIT | A | 65 | Claude Code |
| shadcn-sveltevercel-labs/json-render | Skill | 19k | 2d ago | Apache-2.0 | A | 63 | Claude Code, Codex |
| add-localizationmicrosoft/power-platform-skills | Skill | 1.1k | yesterday | MIT | A | 69 | Claude Code |
| vue-router-best-practicesvuejs-ai/skills | Skill | 3.3k | 14d ago | MIT | A | 25 | Claude Code, Codex |
| moai-domain-uiuxmodu-ai/moai-adk | Skill | 1.3k | 4d ago | Apache-2.0 | A | 49 | Claude Code |
| moai-domain-frontendmodu-ai/moai-adk | Skill | 1.3k | 4d ago | Apache-2.0 | A | 54 | Claude Code |
| frontend-conventionsfpindej/netrock | Skill | 235 | 4d ago | MIT | A | 27 | Claude Code |