ThinkWatch Core 0.55.1

This release stops a request that requires a server-side tool, such as Claude Code's web search, from being sent without it to an upstream of another format.

Upgrade notes

• The control-plane protocol version is unchanged (28) and so is the request store's schema (22). ThinkWatch Lite 2026.9.23 includes 0.54.0 (protocol 27) and does not connect to 0.55.x: a server used with it stays on 0.54.0 until the app is updated to a release that includes 0.55.1.
• New message codes: gw.convert.tool_unsendable and gw.convert.tools_unsendable.

Requests that require a server-side tool. Claude Code runs each web search as a request that carries only the server-side web_search tool and forces the model to use it. Converted for an upstream of another format (AWS Bedrock, OpenAI, Gemini), the server tool was dropped, since only the provider it belongs to runs it: the model answered without searching, and Claude Code passed that answer on as the search results. When the tool a request forces cannot be sent in the upstream's format, that attempt is no longer made. The next upstream of the route is tried, and if none can take the request the client gets a 400 that names the tool and the upstream. Server-side tools offered alongside other tools, which the model is free to leave unused, are still dropped and listed in the request's details as before.

Downloads

Platform	Binary	Archive for server installation
Linux, x86_64	twcore-x86_64-unknown-linux-gnu	twcore-x86_64-unknown-linux-gnu.tar.gz
Linux, aarch64	twcore-aarch64-unknown-linux-gnu	twcore-aarch64-unknown-linux-gnu.tar.gz
macOS, Apple silicon	twcore-aarch64-apple-darwin	—
Windows, x64	twcore-x86_64-pc-windows-msvc.exe	—
Windows, ARM64	twcore-aarch64-pc-windows-msvc.exe	—

Each file is published with a .sha256 file beside it. A Linux archive contains twcore, the systemd unit twcore.service and LICENSE. ThinkWatch Lite includes its own copy of twcore; the files here are for running core separately, such as on a server.

Server installation

On Linux (x86_64 or aarch64), the install script sets up twcore as a systemd service. This installs 0.55.1:

curl -fsSL https://raw.githubusercontent.com/ThinkWatchProject/ThinkWatch-Core/main/scripts/install.sh | sudo sh -s -- --version 0.55.1

An installation made with the script switches to 0.55.1 with:

sudo twcore upgrade --version 0.55.1 --restart

Configuration, the remote control port and connecting ThinkWatch Lite are described in docs/server.md.

Verifying a download

A .sha256 file holds the SHA-256 of the file followed by its name. With both files in the current directory, on Linux:

sha256sum -c twcore-x86_64-unknown-linux-gnu.tar.gz.sha256

On macOS:

shasum -a 256 -c twcore-aarch64-apple-darwin.sha256

On Windows, in PowerShell, the following prints True when the binary matches:

(Get-FileHash .\twcore-x86_64-pc-windows-msvc.exe).Hash -eq (Get-Content .\twcore-x86_64-pc-windows-msvc.exe.sha256).Split()[0]

The install script and twcore upgrade check the SHA-256 themselves.

What's Changed

• fix(gateway): refuse a hop that would drop the tool a request requires by @fylorn in #233
• chore: v0.55.1 by @fylorn in #234

Full Changelog: v0.55.0...v0.55.1