[Agents] Add changelog for Agents SDK v0.5.0 and @cloudflare/ai-chat v0.1.0

[whoiskatrin]

Summary

• Adds a changelog entry for the Agents SDK v0.5.0 release, covering:
  • Built-in retry utilities with exponential backoff, per-task retry options, and class-level defaults
  • First stable release of @cloudflare/ai-chat v0.1.0 with major refactor, new features (maxPersistedMessages, body option, incremental persistence), and numerous bug fixes
  • Synchronous queue and schedule getter methods (backward compatible)
  • React hooks lint fix, TypeScript deep recursion fix, POST SSE keepalive, widened peer dependency ranges

[whoiskatrin]

/bonk review this changelog and fix minor issues if needed

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/changelog/	@cloudflare/pm-changelogs, @cloudflare/pcx-technical-writing

[ask-bonk]

Review Summary

This is a well-written changelog entry. The frontmatter, MDX structure, code examples, and overall content are solid and consistent with the existing v0.4.0 changelog conventions.

What looks good:

• Frontmatter is schema-compliant with valid products references (agents, workers)
• TypeScriptExample component is correctly imported and used
• Code blocks all have proper lowercase language specifiers (ts, sh)
• No unescaped JSX-special characters ({, }, <, >) in prose
• Heading hierarchy is correct (H2 sections, H3 for Upgrade under Other improvements — matches v0.4.0 pattern)
• Internal structure follows the established pattern: intro paragraph, feature sections with code examples, other improvements list, upgrade instructions

One minor fix applied:

• Line 68: Converted the dense comma-separated bug fix sentence into a bulleted list. The original packed five distinct bug fixes into a single run-on sentence, making it harder to scan. The bulleted format is consistent with how the rest of the entry (and the "Key new features" section directly above) presents lists of items.

github run

[github-actions]

Preview URL: https://f59688ac.preview.developers.cloudflare.com
Preview Branch URL: https://changelog-agents-sdk-v0-5-0.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/changelog/2026-02-16-agents-sdk-v050/	https://changelog-agents-sdk-v0-5-0.preview.developers.cloudflare.com/changelog/2026-02-16-agents-sdk-v050/