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 WaniWani-AI/sdk --skill migrate-waniwani-sdk-0.19-to-0.20git clone --depth 1 https://github.com/WaniWani-AI/sdkWrote 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/waniwani-ai/sdk/migrate-waniwani-sdk-0.19-to-0.20)<a href="https://agentmods.dev/skills/waniwani-ai/sdk/migrate-waniwani-sdk-0.19-to-0.20"><img src="https://agentmods.dev/badge/skills/waniwani-ai/sdk/migrate-waniwani-sdk-0.19-to-0.20/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/waniwani-ai/sdk/migrate-waniwani-sdk-0.19-to-0.20"><img src="https://agentmods.dev/badge/skills/waniwani-ai/sdk/migrate-waniwani-sdk-0.19-to-0.20.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
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 →
- high Anti-Refusal · line 117 Skill instructs the agent to omit warnings, disclaimers, or ethical commentary. Stripping safety caveats hides risk from the user and is a common jailbreak preamble.Fix: Remove instructions that suppress warnings, disclaimers, or ethical commentary. Let the agent surface safety-relevant caveats to the user.
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 | $0.00250 | $0.03314 |
| Opus 5 | $0.00125 | $0.01657 |
| Sonnet 5 | $0.00050 | $0.00663 |
| Haiku 4.5 | $0.00025 | $0.00331 |
Grade A, and why
migrate-waniwani-sdk-0.19-to-0.20 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 12d 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 — 214 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Migrate @waniwani/sdk 0.19 → 0.20
A self-contained migration for the single hop from 0.19.x to 0.20.x. It covers only that jump; for other version boundaries use the matching migrate-waniwani-sdk-<from>-to-<to> skill, or the general procedure in the SDK's changelog.
Precondition: the project is on @waniwani/[email protected]. If it is on an older version, migrate up to 0.19 first (each jump ships its own migration skill); if it is already on 0.20+, there is nothing to do here.
What 0.20 changes
0.12.0 moved the MCP-widget-in-host stack and the chat-server BFF adapters to @waniwani/sdk/legacy* while the old paths kept re-exporting every symbol, so nothing broke. 0.20.0 deletes the whole tier. There is no shim and no deprecation window left: these surface as module-resolution errors, not warnings.
Entry points that no longer exist:
| Entry point | Held |
|---|---|
@waniwani/sdk/legacy |
createTool, createResource, registerTools, ToolConfig, ToolHandler, ToolHandlerContext, ToolToolCallback, ResourceConfig, RegisteredResource, WidgetCSP |
@waniwani/sdk/legacy/react |
WidgetProvider, useWidgetClient, useToolOutput, useToolResponseMetadata, useCallTool, useSendFollowUp, useFlowAction, useUpdateModelContext, useDisplayMode, useRequestDisplayMode, useTheme, useLocale, useSafeArea, useMaxHeight, useWidgetState, useOpenExternal, useIsChatGptApp, InitializeNextJsInIframe, LoadingWidget, DevModeProvider, the mock helpers, detectPlatform, isMCPApps, isOpenAI |
@waniwani/sdk/legacy/next-js, @waniwani/sdk/next-js |
toNextJsHandler |
@waniwani/sdk/legacy/express-js, @waniwani/sdk/express-js |
toExpressJsHandler |
@waniwani/sdk/chat/server |
ApiHandler, ApiHandlerOptions, BeforeRequestContext, BeforeRequestResult, ClientVisitorContext, VisitorMeta, WebSearchConfig, GeoLocation, extractGeoFromHeaders |
Also gone: ChatCard and ChatCardProps from @waniwani/sdk/chat.
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.
- 12d ago First seen · 214 lines · 250 tokens per session scan A 7358e4dcbb14
migrate-waniwani-sdk-0.19-to-0.20 is a skill published in the GitHub repository WaniWani-AI/sdk (17 stars, last pushed yesterday), licensed MIT. It adds 250 tokens to every session and 3,314 once invoked, about $0.0013 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.
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