pi-schema: opt-in coercion, compile(schema, { coerce: true }) with coerce() and
parse(), the superset of TypeBox's Value.Convert rules and pi-ai's old coercion;
unresolvedRefs option; url and json-pointer-uri-fragment formats.
pi-ai: Tool takes any JSON Schema; validation through pi-schema; Type, Static
and TSchema are no longer exported (breaking). pi-agent-core and pi-durable:
tools on pi-schema, no TypeBox dependency. Coding agent: extensions keep Type,
Static, TSchema and StringEnum through an extension view of pi-ai; built-in
tools stay on TypeBox.
Nested tool calls: ToolExecutionApi.executeTool() runs another tool as its own pi.tool task owned by the caller,
keyed for replay-safe reattachment. Results for programs live in the caller's NestedResultDoc until it settles;
pi.live.nestedTools shows each call with the arguments it runs with and a summary. TaskOptions.abandonOnRestart
aborts work its creator awaited only in memory before it runs again after a restart.
Structured output: structuredOutputSchema and structuredOutput, validated; a tool without a schema gives programs its
bounded output (one text as a string, one image as itself, else the list). ToolExecutionResult.content is now output.
callers and modelTools decide who may call a tool.
Storage errors: any error a Storage method throws fails the Session, which closes itself; later calls and waits reject
with SessionFailed, watches end with session_failed, and Session.closed settles. Nothing retries in the Harness.
StorageRejected is removed; StorageRequestError marks invalid reads that fail only their call. Listener and onReport
errors are contained and reported.
Also updates scripts/issues/triage.ts and the vacation experiment for the content -> output rename.
A run's input is committed before the system prompt is rendered, so requests
started with the user message. Anthropic then sent the tool list at the top of
every request and each tool change invalidated the whole prompt cache. Context
derivation now moves a system message preceded only by user messages to the
front. A live e2e test gates the cache reuse across a tool change.
closes#10542
