Add replay and rework hook resolution

[anbuzin]

Adds a replay system that takes an optional checkpoint= parameter and uses it to replay API calls and tool executions on re-entry. This unifies the API across long-running and serverless applications.

Also, because this is a major API rework, I've added some tests and updated all of the examples along the way.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
py-ai	Ready	Preview, Comment	Feb 12, 2026 7:59pm

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​@​streamdown/​cjk@​1.0.1
	npm/​@​streamdown/​math@​1.0.1
	npm/​@​streamdown/​mermaid@​1.0.1
	npm/​@​streamdown/​code@​1.0.1
	npm/​class-variance-authority@​0.7.1
	npm/​typescript-eslint@​8.54.0
	npm/​@​ai-sdk/​react@​3.0.74
	npm/​@​types/​react-dom@​19.2.3
	npm/​shiki@​3.22.0
	npm/​@​tanstack/​react-router@​1.158.1
	npm/​@​types/​react@​19.2.13
	npm/​clsx@​2.1.1
	npm/​nanoid@​5.1.6
	npm/​radix-ui@​1.4.3
	npm/​@​types/​node@​24.10.11
	npm/​vite@​7.3.1
	npm/​cmdk@​1.1.1
	npm/​tailwindcss@​4.1.18
	npm/​react@​19.2.4
	npm/​globals@​16.5.0
	npm/​tailwind-merge@​3.4.0
	npm/​@​tanstack/​react-query@​5.90.20
	npm/​use-stick-to-bottom@​1.1.2
	npm/​@​tailwindcss/​vite@​4.1.18
	npm/​typescript@​5.9.3
	npm/​eslint-plugin-react-refresh@​0.4.26
	npm/​react-dom@​19.2.4
	npm/​lucide-react@​0.563.0
	npm/​eslint@​9.39.2
	npm/​streamdown@​2.1.0
	npm/​@​eslint/​js@​9.39.2
	pypi/​anthropic@​0.79.0
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[socket-security]

Warning

Review the following alerts detected in dependencies.

According to your organization's Security Policy, it is recommended to resolve "Warn" alerts. Learn more about Socket for GitHub.

Action	Severity	Alert  (click "▶" to expand/collapse)
Warn		Obfuscated code: npm entities is 91.0% likely obfuscated Confidence: 0.91 Location: Package overview From: examples/fastapi-vite/frontend/pnpm-lock.yaml → npm/streamdown@2.1.0 → npm/@streamdown/math@1.0.1 → npm/entities@6.0.1 ℹ Read more on: This package | This alert | What is obfuscated code? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support@socket.dev. Suggestion: Packages should not obfuscate their code. Consider not using packages with obfuscated code. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore npm/entities@6.0.1. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.
Warn		Obfuscated code: npm safer-buffer is 94.0% likely obfuscated Confidence: 0.94 Location: Package overview From: examples/fastapi-vite/frontend/pnpm-lock.yaml → npm/@streamdown/mermaid@1.0.1 → npm/safer-buffer@2.1.2 ℹ Read more on: This package | This alert | What is obfuscated code? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support@socket.dev. Suggestion: Packages should not obfuscate their code. Consider not using packages with obfuscated code. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore npm/safer-buffer@2.1.2. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.
Warn		Obfuscated code: npm vite is 91.0% likely obfuscated Confidence: 0.91 Location: Package overview From: examples/fastapi-vite/frontend/package.json → npm/vite@7.3.1 ℹ Read more on: This package | This alert | What is obfuscated code? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support@socket.dev. Suggestion: Packages should not obfuscate their code. Consider not using packages with obfuscated code. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore npm/vite@7.3.1. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.

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