chore(vendor): import pi 1.3.0

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: 71023aec1546d6d677a65669c5665c0927ce0dd0

third_party/pi/packages/agent/CHANGELOG.md

@@ -1,5 +1,80 @@
 # Changelog
 
+## [1.3.0] - 2026-10-15
+
+## [1.2.0] - 2026-10-12
+
+## [1.1.0] - 2026-10-07
+
+### Added
+
+- Added `durationMs` to tool result messages, `AgentToolCallOutcome`, and `tool_execution_end` events: how long `execute()` took, measured with a monotonic clock and excluding hooks. Calls that did not run have none ([#10549](https://github.com/earendil-works/pi/issues/10549))
+
+### Changed
+
+- `streamProxy()` returns an `AssistantMessageEventStream`, so proxied responses get `durationMs` like direct ones
+
+## [1.0.4] - 2026-10-05
+
+## [1.0.3] - 2026-10-05
+
+## [1.0.2] - 2026-10-04
+
+## [1.0.1] - 2026-10-03
+
+## [1.0.0] - 2026-10-01
+
+### Breaking Changes
+
+- Removed the experimental harness from `@earendil-works/pi-agent-core`: `AgentHarness`, sessions and session storage, the durable runtime, pico3, harness tools, compaction, skills, prompt templates, system prompt helpers, telemetry schemas, the search service types, and the `uuidv7` and pi-telemetry re-exports. The `./node`, `./harness/*`, and `./experimental/pico3` subpath exports are gone. The package now contains only `Agent`, the agent loop, the proxy stream, and their types. Use `@earendil-works/pi-durable` for durable sessions.
+
+## [0.99.2] - 2026-09-30
+
+## [0.99.1] - 2026-09-29
+
+## [0.99.0] - 2026-09-29
+
+### Added
+
+- Added the `onProviderStreamEvent` agent option, which is passed to provider streams to observe parsed provider events before normalization ([#9784](https://github.com/earendil-works/pi/issues/9784), [#9901](https://github.com/earendil-works/pi/pull/9901) by [@davidbrai](https://github.com/davidbrai)).
+- The agent loop now records the requested thinking level as `thinkingLevel` on each assistant message.
+
+## [0.87.1] - 2026-09-22
+
+## [0.87.0] - 2026-09-21
+
+### Breaking Changes
+
+- Removed `AgentOptions.shouldStopAfterTurn` and `AgentLoopConfig.shouldStopAfterTurn`. Use `finishTurn` and return `{ action: "end" }` to stop after the completed turn:
+
+  ```ts
+  // Before
+  shouldStopAfterTurn: async (turn, signal) => await shouldStop(turn, signal),
+
+  // After
+  finishTurn: async (turn, signal) => {
+    // shouldStopAfterTurn previously ran only for normal responses.
+    if (turn.message.stopReason === "error" || turn.message.stopReason === "aborted") return;
+    return (await shouldStop(turn, signal)) ? { action: "end" } : undefined;
+  },
+  ```
+
+  `finishTurn` runs after the assistant and all tool results are finalized but before `turn_end`; its decision is applied after `turn_end`. It also runs for error and aborted responses, whose decisions are ignored because those responses remain hard exits. The guard in the migration preserves the old hook's normal-response-only invocation, including avoiding predicate side effects on hard exits. Returning `{ action: "end" }` leaves steering and follow-up queues untouched and skips `prepareNextTurn`.
+
+### Added
+
+- Added `prepareRequest`, which runs before every provider request, including the first. For example, return `{ context: { ...context, messages: persistedMessages } }` to install canonical context after already-selected input is emitted without introducing another queue poll.
+- Added `finishTurn`, which runs after assistant/tool-result finalization and before `turn_end` for normal, error, and aborted responses. Return `{ action: "end" }` to end a normal run after `turn_end`, or `undefined` to preserve normal scheduling. `{ action: "continue" }` ensures one next provider request: existing tool-result, steering, or follow-up scheduling can satisfy that request without adding another one; otherwise the loop makes one context-only request. Error and aborted responses remain hard exits.
+- Added `Agent.peekQueuedMessages()` to preview the next queue-selected batch without consuming it.
+
+### Fixed
+
+- Fixed harness reads misclassifying text files beginning with `GIF` as images ([#9755](https://github.com/earendil-works/pi/issues/9755)).
+
+## [0.86.1] - 2026-09-20
+
+## [0.86.0] - 2026-09-19
+
 ## [0.85.1] - 2026-09-05
 
 ## [0.85.0] - 2026-09-04