The harness landed in 4973ada and spread to 11 component test files
without the guide mentioning it, while relays cited the guide as
sanctioning it. Document the per-file @vitest-environment opt-in, the
seam-selection order (pure exported seam, happy-dom, TemplateResult
extraction), happy-dom conventions and limits, and the opportunistic
migration stance for existing extraction tests.
Show a pinned banner at the top of the session view with resource and
runtime diagnostics (skills, prompts, themes, extension load errors) plus
the Anthropic subscription-auth billing notice, recomputed live from the
current runtime so they stay accurate across browser reloads.
Warnings carry an optional dismiss capability; the Anthropic notice is
dismissable and durably suppressed through pi's own anthropicExtraUsage
warning setting. Also fixes the testing-guide skill frontmatter so it
loads.
Federico Jaramillo Martinez