# Engineering changelog > Selected desktop, server, and mobile changes from the repository, grouped by the behavior they affect. Handbook / Contribute · Checked against the source on 2026-10-05 · https://www.hbcode.ai/docs/changelog ## How to read these entries > **Commit dates, not release dates** These entries describe engineering work committed to the repository through 30 September 2026. A change reaches the installers and the app stores later, so check your installed version when you report behavior. Work in progress is left out. ## 30 September 2026 · HB Code and one chat layer for both agents - Renamed the product to HB Code: names, icons, and website links on the desktop and in the mobile apps. - Separated the shared chat state from the agent adapters. The desktop code is now in chat, agents/codex, agents/claude, and agents/dispatch. - Renamed the chat RPC methods from run.codexChat… to run.chat… for both agents. The relay now requires protocol 1.7 from every app. - Added Claude subagents, Claude account controls, and usage history. - Fixed races between usage-history requests. Source: commit 8f6d69f74. - [Where the desktop code lives](https://www.hbcode.ai/docs/contributing.md#layout): The chat layer, dispatch, the two adapters, and the allowed imports. ## 28 September 2026 · Claude sessions - Added Claude Code as a second agent. You pick Codex or Claude when you create a session, on the desktop or on a phone. - Ran Claude through a desktop-owned agent host with the Claude Agent SDK, including the Claude sign-in, saved conversation import, and model and access controls. - Extended the iOS and Android session contracts to Claude sessions. - Kept history pages bounded while complete assistant replies stay together. Source: commit 16fb6698a. - [The Claude Agent SDK integration](https://www.hbcode.ai/docs/claude-agent-sdk.md): The agent host, history projection, approvals, subagents, and accounts. ## 26 September 2026 · Workspace delivery and previews - Kept an Android message that the desktop rejects, with the reason, instead of sending it again or dropping it. - Hardened browser uploads and the isolation between server services. - Improved timeline and command output handling. Source: commit 3339faf0a. - [Timeline](https://www.hbcode.ai/docs/timeline.md): History pages, the revisioned live overlay, settlement epochs, and the pagination splice contract. ## 16 September 2026 · Workspace previews and session reliability - Added scoped preview caching and native document handling on the desktop and the phones. - Added session access settings and timeline reliability fixes across desktop and mobile. - Extended the shared RPC contract and its regression tests. Source: commit 94510a616. - [Command output, documents, and previews](https://www.hbcode.ai/docs/output-and-previews.md): Artifacts, the HTML sandbox, and file transfers. ## 15 September 2026 · Document previews and mobile reliability - Opened local HTML files as rendered documents: the desktop with a Source view and Reload, iPhone with Reload and Done, Android as file-backed previews. - Moved large file reads to sequential 4 MiB chunks and made desktop and mobile navigation between previews more predictable. - Improved outbox delivery, session loading, and Git error recovery. Published this handbook on the website. - Rebuilt the native media tools from source for both desktop platforms and updated dependency locks. Source: commits 8deb6d413 and acaf6575f. - [Command output, documents, and previews](https://www.hbcode.ai/docs/output-and-previews.md#html-documents): The HTML sandbox, chunked file transfers, and web pages as Markdown. ## 11 September 2026 · Desktop dictation - Added personal OpenAI API key settings alongside Gemini for desktop dictation. - Separated transcription quota errors from rate limits and added recording-size validation before an OpenAI upload. - Added credential-settings and transcription recovery checks. Source: commit 7a5749266. - [Dictation and vocabulary](https://www.hbcode.ai/docs/tools/dictation.md#dictation): Providers, models, hint vocabularies, and the error classes. ## 10 September 2026 · iOS recording and history - Improved recording controls and dictation feedback in the iOS workspace. - Adjusted the initial timeline presentation and limited older-history paging to one request per user gesture. - Added focused tests for dictation presentation and the first older-page load. Source: commit 8aa267c67. A separate dependency update, e10d28915, patched the smol-toml denial-of-service issue. - [iOS: chat hosts, the collection view, and the outbox](https://www.hbcode.ai/docs/ios/chat.md): Snapshots, older pages, scrolling, and the outbox on the iPhone. ## 9 September 2026 · Account and workspace recovery - Preserved rotated refresh tokens when later validation fails, while keeping logout and account deletion serialized. - Updated relay expiry, rate limits, and database runtime checks, and added a PostgreSQL backup playbook and Redis setup changes. - Included iOS session, timeline, composer, and highlighting fixes, plus desktop Git and runtime integration updates. Source: commit b437b7a6d. The commit records server and database validation and makes no claim about a production deployment or an iOS runtime test. - [Accounts, auth, and regions](https://www.hbcode.ai/docs/accounts-and-auth.md): The PKCE handoff, token refresh, and what a region change invalidates. ## 5 September 2026 · Chat delivery and timeline stability - Preserved retry identity and improved recovery of cancelled outbox operations. - Kept first-message timeline updates visible and removed stale compaction progress. - Improved sidebar search, command-output controls, and model-setting continuity through queued delivery. - Added account-scoped desktop discovery and switcher recovery fixes. Sources: commits c3485b2af and 9cd174076. - [Message delivery](https://www.hbcode.ai/docs/message-delivery.md): Outbox custody, turn admission, and recovery of a lost reply.