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 Chemaclass/agnostic-ai --skill playground-rebuildgit clone --depth 1 https://github.com/Chemaclass/agnostic-aiWrote 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/chemaclass/agnostic-ai/playground-rebuild)<a href="https://agentmods.dev/skills/chemaclass/agnostic-ai/playground-rebuild"><img src="https://agentmods.dev/badge/skills/chemaclass/agnostic-ai/playground-rebuild/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/chemaclass/agnostic-ai/playground-rebuild"><img src="https://agentmods.dev/badge/skills/chemaclass/agnostic-ai/playground-rebuild.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00037 | $0.00363 |
| Opus 5.5 | $0.00015 | $0.00145 |
| Sonnet 5.5 | $0.00007 | $0.00073 |
| Haiku 4.5 | $0.00004 | $0.00036 |
Grade A, and why
playground-rebuild 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 3d 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
playground-rebuild
The hosted playground at https://agnostic-ai.org/playground/ runs the same code as the CLI, compiled to WebAssembly via cmd/agnostic-ai-wasm.
Build
make playground-build
Writes docs/playground/agnostic-ai.wasm and copies wasm_exec.js, the helper script from the Go toolchain. Both are gitignored; CI regenerates them on push to main.
Serve locally
make playground-serve
Builds the Zola site and WebAssembly bundle, assembles the same files that GitHub Pages publishes, then serves _site/ with python3 -m http.server 8080. Open http://127.0.0.1:8080/playground/.
file:// does not work because browsers refuse WebAssembly.instantiateStreaming on local files.
After edits
For frontend or Go source changes, stop the server started for this task and rerun make playground-serve, then refresh the browser. This rebuilds and copies the bundle into _site/playground/. make playground-build alone updates docs/playground/, leaving the served copy stale.
Exercise the changed spec and target in the browser and inspect its generated output or error. Record the scenario and result. Select any additional checks from repository-root docs/internal/contributing.md, section "Choose checks for your change".
Clean
make playground-clean
Removes the generated .wasm and wasm_exec.js.
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.
- 3d ago Changed · +1 lines 05d5879bc33d
- 18d ago Changed e52e9e5c0b66
- 1mo ago Changed c300fcd59e00
- 1mo ago First seen · 40 lines · 37 tokens per session scan A f970147bf0f4
playground-rebuild is a skill published in the GitHub repository Chemaclass/agnostic-ai (25 stars, last pushed today), licensed MIT. It adds 37 tokens to every session and 363 once invoked, about $0.0001 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 2026-08-30.
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