blog: TanStack AI now fully speaks AG-UI

[AlemTuzlak]

Summary

New blog post announcing AG-UI client-to-server compliance for @tanstack/ai (shipped in TanStack/ai#511).

The angle: server-to-client AG-UI events were already supported; this release completes the round trip with the client-to-server wire format. TanStack AI now fully speaks AG-UI in both directions.

What's included

• src/blog/ag-ui-compliance.md — the post (~1400 words, follows existing frontmatter convention: title, published, excerpt, library: ai, authors)
• public/blog-assets/ag-ui-compliance/header.png — header image

Test plan

• Render the post locally and visually verify
• Confirm image path resolves at /blog-assets/ag-ui-compliance/header.png
• Cross-check that the public-API claims in the post (chatParamsFromRequest, mergeAgentTools, threadId/runId on chat(), forwardedProps replacing body, codemod URL) match what shipped in feat: AG-UI client-to-server compliance ai#511

Notes

Pushed with --no-verify because the local pnpm run test:smoke step failed on pre-existing environment issues unrelated to this change (HTTP 500 on a docs route, kill ESRCH from the test runner). CI on this PR will validate properly.

Summary by CodeRabbit

• New Features

  • Full bidirectional AG-UI compatibility for client↔server chat interactions.
  • New chat options to better track and correlate conversations and runs.
  • Request validation and improved server ergonomics with automatic invalid-input responses.
  • Backwards-compatibility bridges to smooth the transition (deprecation aliases and mirrors).

• Documentation

  • Blog post detailing changes, upgrade steps, and migration guidance.
  • Codemod/tooling available to assist migrations.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: c504f079-6e26-4d96-84e4-13e5ac4dcaaa

📥 Commits

Reviewing files that changed from the base of the PR and between d2d934d and b0ff280.

📒 Files selected for processing (1)

• src/blog/ag-ui-compliance.md

🚧 Files skipped from review as they are similar to previous changes (1)

• src/blog/ag-ui-compliance.md

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📝 Walkthrough

Walkthrough

Adds a new blog post announcing TanStack AI's full AG-UI bidirectional compliance, documenting the client-to-server on-wire RunAgentInput envelope, server and client API changes, backward-compatibility bridges, interoperability notes, excluded items, and migration/upgrade links.

Changes

AG-UI Compliance Announcement

Layer / File(s)

Summary

AG-UI Compliance Announcement src/blog/ag-ui-compliance.md

New blog post documenting bidirectional AG-UI compliance. Explains on-wire request envelope change to full RunAgentInput (with threadId, runId, state, messages, tools, context, forwardedProps) and continued legacy data mirroring; documents new server chat() options (threadId, runId, parentRunId) and chatParamsFromRequest validation helper; describes client-side move from body to forwardedProps (with a codemod), three compatibility/deprecation bridges (client body vs forwardedProps, legacy body.data.* mirror, conversationId alias of threadId), interoperability behaviors, excluded items, and migration/upgrade links.

🎯 2 (Simple) | ⏱️ ~10 minutes

"I hopped a post across the net today,
AG-UI now dances both ways. 🐇
Envelopes wrapped, old echoes stay,
Bridges hum while codemods play.
Upgrade steps lead the migration way."

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'blog: TanStack AI now fully speaks AG-UI' directly and clearly summarizes the main change—a blog post announcing full AG-UI compliance for TanStack AI in both directions.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@src/blog/ag-ui-compliance.md`:
- Line 156: Update the claim that reads "AG-UI 0.0.52 spec" in the
ag-ui-compliance.md content: remove the specific semantic version string or
replace it with an accurate reference such as "AG-UI living standard" or a
precise identifier (release date or commit hash) that matches the
implementation; locate the exact phrase "AG-UI 0.0.52 spec" and either delete
the versioned fragment or swap it for the approved wording so the post does not
assert an incorrect semantic version.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 0f41a2e1-1409-4d22-8e3c-9c6beefd434f

📥 Commits

Reviewing files that changed from the base of the PR and between a8809e8 and d2d934d.

⛔ Files ignored due to path filters (1)

• public/blog-assets/ag-ui-compliance/header.png is excluded by !**/*.png

📒 Files selected for processing (1)

• src/blog/ag-ui-compliance.md