chore(harness): upgrade Pi to 0.83.0

[jonathanlab]

Problem

The repository pins Pi 0.82.1 while Pi 0.83.0 is the current stable release. The upgrade changes TypeBox to 1.3.7 and refreshes OAuth credentials with less than five minutes of validity remaining.

Changes

• Upgrade all Pi packages to 0.83.0.
• Declare TypeBox 1.3.7 directly in @posthog/harness.
• Update OAuth fixtures for the five-minute refresh window.
• Cover nullable-array TypeBox validation used by MCP schemas.

How did you test this?

• pnpm typecheck
• pnpm --filter @posthog/harness test
• pnpm --filter @posthog/agent typecheck
• pnpm --filter @posthog/agent exec vitest run src/pi/runtime.test.ts src/pi/rpc-client.test.ts src/pi/rpc-transport.test.ts src/pi/model-catalog.test.ts src/pi/queue-persistence.test.ts src/pi/conversation/translatePiConversation.test.ts src/pi/conversation/translatePiMessage.test.ts src/pi/conversation/tools
• pnpm --filter @posthog/workspace-server exec vitest run src/services/pi-session/pi-session.test.ts

Automatic notifications

• Publish to changelog?
• Alert Sales and Marketing teams?

[trunk-io]

😎 Merged directly without going through the merge queue, as the queue was empty and the PR was up to date with the target branch - details.

[github-actions]

React Doctor found no issues in the changed files. 🎉

_{Reviewed by React Doctor for commit 987935e.}

[stamphog]

Note

🤖 stamphog reviewed 987935e8182e014812446d1aa06b7e2f5d9eb68d — verdict: REFUSED

Gates denied this PR (deny-listed dependency/toolchain change, classified T2-never) — it's a genuine dependency and lockfile upgrade, and Greptile's in-flight review (👀) means review hasn't concluded.

• Gate verdict DENIED: matches deps_toolchain deny-list and classified T2-never
• Touches dependency manifests and pnpm-lock.yaml (third-party code upgrade) — risky territory needing human review
• Greptile review is in-flight (👀 reaction) — should wait for it to complete before merging

Gate mechanics and policy version

Gate		Result
prerequisites	✓	all clear
deny-list	✗	matches: deps_toolchain
size	✓	116L, 3F substantive, 133L/5F incl. docs/generated/snapshots — within ceiling
tier	✗	classified as T2-never: T2-never (133L, 5F, single-area, chore)
stamphog 2.0.0b3		.stamphog/policy.yml @ 94c47de · reviewed head 987935e

[greptile-apps]

_{Reviews (1): Last reviewed commit: "chore(harness): upgrade Pi to 0.83.0" | Re-trigger Greptile}