Replace the tsgo native preview with typescript@7.0.2 and port the check scripts to the TS 7 API. Target ES2024, drop useDefineForClassFields: false and unused decorator options, and enable verbatimModuleSyntax. Replace tsx with node plus the source resolver hook, passed to --import as a file URL.
closes#9965
This change makes system prompt text and tool changes part of the transcript rather than silently rewriting its starting conditions. This lets Pi record when instructions changed or tools became available, restore that state after resuming or navigating branches, and preserve cached prompt prefixes where the upstream supports it.
`parseFrontmatter` runs a real YAML parser, so `tools: [read, bash]`
arrives as an array while `tools: read, bash` arrives as a string. The
loader only handled the string form and called `.split(",")`, which
throws on the array form.
The throw escapes `loadAgentsFromDir` -- only `readdirSync` and
`readFileSync` are guarded -- so one agent file using the array form
broke discovery for every agent in that scope, not just itself.
Normalize both spellings in one helper, and type the frontmatter fields
as `unknown` so the string assumptions are explicit. The previous
`parseFrontmatter<Record<string, string>>` annotation asserted a shape
the YAML parser never guarantees, which is what hid the mismatch from
tsc while `AgentConfig.tools` was already typed `string[]`.
Move provider auth and OAuth flows onto pi-ai Models, compose models.json and extension overlays through ModelRuntime, and retain ModelRegistry as an extension compatibility facade.
The question extension tool blocks on ctx.ui.custom() but omitted
executionMode, so multiple question calls in one assistant turn ran
under the default parallel mode and raced on the editor slot. Only the
last question rendered; earlier calls hung pending forever.
Set executionMode: "sequential" so the agent loop serializes the
batch. Wrappers already propagate the field to the core.
closes#6189
