Borrowing it
Nothing to install: this file belongs to BloomBooks/BloomDesktop. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/BloomBooks/BloomDesktop/master/.claude/skills/bloom-canvas-e2e-testing/SKILL.mdgit clone --depth 1 https://github.com/BloomBooks/BloomDesktopWrote 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/bloombooks/bloomdesktop/bloom-canvas-e2e-testing)<a href="https://agentmods.dev/skills/bloombooks/bloomdesktop/bloom-canvas-e2e-testing"><img src="https://agentmods.dev/badge/skills/bloombooks/bloomdesktop/bloom-canvas-e2e-testing/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/bloombooks/bloomdesktop/bloom-canvas-e2e-testing"><img src="https://agentmods.dev/badge/skills/bloombooks/bloomdesktop/bloom-canvas-e2e-testing.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 | $0.00078 | $0.00363 |
| Opus 5.5 | $0.00031 | $0.00145 |
| Sonnet 5.5 | $0.00016 | $0.00073 |
| Haiku 4.5 | $0.00008 | $0.00036 |
Grade A, and why
bloom-canvas-e2e-testing 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 1mo 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
Canvas e2e tests
The suite, its helpers, the frame model, the selectors, the run commands and the stability rules
all live with the tests: read and follow
src/BloomBrowserUI/bookEdit/canvas-e2e-tests/AGENTS.md. This skill only says when to reach for
it and repeats the one rule that can hang a run.
Use it for automated Playwright tests of Canvas Tool behavior, verified with real mouse
gestures. Not for component-harness tests under react_components/*/*.uitest.ts
(component-test skill) or for the BloomE2E suite that launches its own Bloom.exe
(add-e2e-test skill).
Before you start: Bloom is running and serving the Edit tab, the current page has a
.bloom-canvas, and the Canvas tool is in the toolbox. Take the port from
launcherControl.mjs --status (see run-bloom); 8089 is first-come across worktrees.
Never let a native OS dialog open unprepared (file picker, video capture, "Record
yourself..."): Playwright cannot see it and the run hangs. The AGENTS.md above lists which
commands are safe and how winformsUia.ps1 drives a picker when one is unavoidable.
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.
- 1mo ago Changed f7f042a065f4
- 1mo ago Changed · -82 lines · +48 tokens per session fb4690881af4
- 1mo ago Changed · +7 lines 458162713611
- 2mo ago First seen · 100 lines · 30 tokens per session scan A b17f3a705667
bloom-canvas-e2e-testing is a skill published in the GitHub repository BloomBooks/BloomDesktop (43 stars, last pushed today), licensed MIT. It adds 78 tokens to every session and 363 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 2026-08-30.
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