diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3cc4fb33..ba753709 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,8 @@ GitHub Releases page; `0.8.0` is the new starting line.
## Unreleased
+## 0.51.0 (2026-06-22)
+
- **Reasoning levels now match each GPT model.** The thinking selector and
Shift+Tab cycle scope reasoning effort to what the active OpenAI GPT-5-family
model actually accepts β e.g. gpt-5.4/gpt-5.5 no longer offer `minimal`
@@ -46,6 +48,8 @@ GitHub Releases page; `0.8.0` is the new starting line.
so brew can't delete the in-use Cellar version mid-session; the new build is
staged side-by-side and goes live on restart.
+Upgrade with `pythinker update`, `pip install --upgrade pythinker-code==0.51.0`, or use the native installer for your platform from the [Releases page](https://github.com/Pythoughts-labs/pythinker-code/releases/latest).
+
## 0.50.0 (2026-06-20)
- **Silent native updates no longer crash a running session.** The downloaded
diff --git a/README.md b/README.md
index 2e87fd99..d0f69853 100644
--- a/README.md
+++ b/README.md
@@ -50,12 +50,16 @@ It speaks the [**Agent Client Protocol (ACP)**](https://github.com/agentclientpr
---
-## π What's New in 0.50.0
+## π What's New in 0.51.0
-- **Safer silent updates.** The downloaded build is now staged beside the running executable and promoted at exit, instead of overwriting the live onefile bundle in place β eliminating mid-session `zlib: incorrect header check` crashes after a background update.
-- **Cleaner update notice.** The "Updated β vX. Restart to apply." line renders below the prompt's bottom border, not inside the input area.
+- **Model-aware thinking levels.** The thinking selector and Shift+Tab cycle now scope reasoning effort to what the active GPT-5-family model accepts; unsupported persisted levels are clamped before the API call.
+- **Cleaner diff cards.** Diff syntax highlighting no longer paints an opaque code-theme background over green/red row tints β tints show through on every terminal.
+- **Truecolor in VS Code terminals.** Integrated terminals reporting `TERM_PROGRAM=vscode` (and forks) are promoted to truecolor so diff tints don't fall back to 16-color mode.
+- **No duplicate welcome banner on reload.** Same-session reloads (`/model`, `/theme`, `/thinking`, β¦) keep the existing banner instead of stacking a second splash.
+- **Update notice moved to footer.** The persistent "Restart to apply" / "Update available" line renders below the status/clock row, clear of the input box.
+- **Safer Homebrew self-upgrades.** Silent `brew upgrade` runs with cleanup/auto-update disabled so the in-use Cellar version isn't deleted mid-session.
-Upgrade with `pythinker update`, `pip install --upgrade pythinker-code==0.50.0`, or use the native installer for your platform from the [Releases page](https://github.com/Pythoughts-labs/pythinker-code/releases/latest).
+Upgrade with `pythinker update`, `pip install --upgrade pythinker-code==0.51.0`, or use the native installer for your platform from the [Releases page](https://github.com/Pythoughts-labs/pythinker-code/releases/latest).
---
@@ -145,7 +149,7 @@ matches your OS β no Python, Node, or `uv` prerequisite.
| Platform | Recommended install | Artifact source |
|---|---|---|
-| **πͺ Windows** | `irm https://pythinker.com/install.ps1 \| iex` | `PythinkerSetup-0.50.0.exe` from [Releases](https://github.com/Pythoughts-labs/pythinker-code/releases/latest) |
+| **πͺ Windows** | `irm https://pythinker.com/install.ps1 \| iex` | `PythinkerSetup-0.51.0.exe` from [Releases](https://github.com/Pythoughts-labs/pythinker-code/releases/latest) |
| **
/
** | `curl -fsSL https://pythinker.com/install.sh \| bash` | native tarball from [Releases](https://github.com/Pythoughts-labs/pythinker-code/releases/latest) |
| **
β Homebrew** | `brew install Pythoughts-labs/pythinker/pythinker-code` | auto-published Homebrew tap |
| **π³ Docker** | `docker run --rm -it ghcr.io/pythoughts-labs/pythinker-code` | GHCR multi-arch image |
@@ -173,7 +177,7 @@ pythinker # start the interactive TUI
### πͺ Windows β native installer
-`PythinkerSetup-0.50.0.exe` is a signed* Inno Setup wizard. Installs per-user
+`PythinkerSetup-0.51.0.exe` is a signed* Inno Setup wizard. Installs per-user
into `%LOCALAPPDATA%\Programs\Pythinker`, registers `pythinker` on your user
PATH (`HKCU\Environment`), broadcasts `WM_SETTINGCHANGE` so new shells see
the change. **No UAC prompt.**
@@ -184,13 +188,13 @@ irm https://pythinker.com/install.ps1 | iex
# Or manually download the installer + checksum from the Releases page,
# verify with Get-FileHash, then run:
-.\PythinkerSetup-0.50.0.exe
+.\PythinkerSetup-0.51.0.exe
# Open a fresh PowerShell
pythinker --version
```
-**Per-machine install** (IT-managed boxes): `.\PythinkerSetup-0.50.0.exe /ALLUSERS`
+**Per-machine install** (IT-managed boxes): `.\PythinkerSetup-0.51.0.exe /ALLUSERS`
installs to `%ProgramFiles%\Pythinker` and writes PATH to HKLM (requires admin).
**Upgrade:** `pythinker update` from inside the running app β it downloads
@@ -248,26 +252,26 @@ attached to every GitHub Release.
```sh
# Debian / Ubuntu (x86_64)
-sudo dpkg -i pythinker-code_0.50.0_amd64.deb
+sudo dpkg -i pythinker-code_0.51.0_amd64.deb
sudo apt-get install -f # only if dpkg reports missing deps
# Debian / Ubuntu (ARM64)
-sudo dpkg -i pythinker-code_0.50.0_arm64.deb
+sudo dpkg -i pythinker-code_0.51.0_arm64.deb
# Fedora / RHEL / openSUSE (x86_64)
-curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.50.0/pythinker-code-0.50.0.x86_64.rpm
-curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.50.0/pythinker-code-0.50.0.x86_64.rpm.sha256
-sha256sum -c pythinker-code-0.50.0.x86_64.rpm.sha256
+curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.51.0/pythinker-code-0.51.0.x86_64.rpm
+curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.51.0/pythinker-code-0.51.0.x86_64.rpm.sha256
+sha256sum -c pythinker-code-0.51.0.x86_64.rpm.sha256
# Fedora / RHEL:
-sudo dnf install ./pythinker-code-0.50.0.x86_64.rpm
+sudo dnf install ./pythinker-code-0.51.0.x86_64.rpm
# openSUSE:
-sudo zypper install ./pythinker-code-0.50.0.x86_64.rpm
+sudo zypper install ./pythinker-code-0.51.0.x86_64.rpm
# Fedora / RHEL (aarch64)
-curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.50.0/pythinker-code-0.50.0.aarch64.rpm
-curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.50.0/pythinker-code-0.50.0.aarch64.rpm.sha256
-sha256sum -c pythinker-code-0.50.0.aarch64.rpm.sha256
-sudo dnf install ./pythinker-code-0.50.0.aarch64.rpm
+curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.51.0/pythinker-code-0.51.0.aarch64.rpm
+curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.51.0/pythinker-code-0.51.0.aarch64.rpm.sha256
+sha256sum -c pythinker-code-0.51.0.aarch64.rpm.sha256
+sudo dnf install ./pythinker-code-0.51.0.aarch64.rpm
```
Both packages drop a small `/usr/bin/pythinker` launcher that execs the real
@@ -276,8 +280,8 @@ binary under `/usr/lib/pythinker/`, so your `$PATH` stays tidy.
**Verify before install:**
```sh
-sha256sum -c pythinker-code_0.50.0_amd64.deb.sha256 # Debian/Ubuntu
-sha256sum -c pythinker-code-0.50.0.x86_64.rpm.sha256 # Fedora/RHEL
+sha256sum -c pythinker-code_0.51.0_amd64.deb.sha256 # Debian/Ubuntu
+sha256sum -c pythinker-code-0.51.0.x86_64.rpm.sha256 # Fedora/RHEL
```
**Upgrade:** download the new `.deb`/`.rpm` from Releases and `dpkg -i` /
diff --git a/docs/en/guides/getting-started.md b/docs/en/guides/getting-started.md
index 6725a193..0fd0608d 100644
--- a/docs/en/guides/getting-started.md
+++ b/docs/en/guides/getting-started.md
@@ -31,7 +31,7 @@ Run the native installation script to complete the installation. The canonical e
curl -fsSL https://pythinker.com/install.sh | bash
# Pin a specific version
-curl -fsSL https://pythinker.com/install.sh | bash -s -- --version 0.50.0
+curl -fsSL https://pythinker.com/install.sh | bash -s -- --version 0.51.0
# Custom prefix (defaults to $HOME/.local)
curl -fsSL https://pythinker.com/install.sh | bash -s -- --prefix /opt/pythinker
@@ -44,7 +44,7 @@ On Windows, run the PowerShell bootstrap. It downloads the native installer, ver
irm https://pythinker.com/install.ps1 | iex
```
-You can also download `PythinkerSetup-0.50.0.exe` manually from the [latest release](https://github.com/Pythoughts-labs/pythinker-code/releases/latest).
+You can also download `PythinkerSetup-0.51.0.exe` manually from the [latest release](https://github.com/Pythoughts-labs/pythinker-code/releases/latest).
Verify the installation:
diff --git a/docs/en/release-notes/breaking-changes.md b/docs/en/release-notes/breaking-changes.md
index 5871dd4b..b1be0fd0 100644
--- a/docs/en/release-notes/breaking-changes.md
+++ b/docs/en/release-notes/breaking-changes.md
@@ -4,6 +4,10 @@ This page documents breaking changes in Pythinker Code releases and provides mig
## Unreleased
+## 0.51.0 (2026-06-22)
+
+No breaking changes. This release is compatible with 0.50.0 user configuration, native installs, and session data.
+
## 0.50.0 (2026-06-20)
No breaking changes. This release is compatible with 0.49.0 user configuration, native installs, and session data.
diff --git a/docs/en/release-notes/changelog.md b/docs/en/release-notes/changelog.md
index b3145ed0..fe5c0a28 100644
--- a/docs/en/release-notes/changelog.md
+++ b/docs/en/release-notes/changelog.md
@@ -17,6 +17,30 @@ GitHub Releases page; `0.8.0` is the new starting line.
## Unreleased
+## 0.51.0 (2026-06-22)
+
+- **Reasoning levels now match each GPT model.** The thinking selector and
+ Shift+Tab cycle scope reasoning effort to what the active OpenAI GPT-5-family
+ model actually accepts β e.g. gpt-5.4/gpt-5.5 no longer offer `minimal`
+ (which they reject) and keep `xhigh`, while gpt-5.0 keeps `minimal`. A
+ persisted unsupported level is clamped to the nearest supported one before
+ it is sent, so the API never rejects it.
+- **Diff cards no longer show a "blue overlay".** The syntax highlighter no
+ longer paints the code theme's opaque background (e.g. catppuccin `#1E1E2E`)
+ onto diff lines, so the green/red row tints β and the terminal background on
+ context lines β show through on every terminal. Previously that code-theme
+ block masked the row tints and only blended where the terminal background
+ happened to match it.
+- **VS Code-family terminals are detected as truecolor.** `color_depth()` now
+ promotes integrated terminals reporting `TERM_PROGRAM=vscode` (including forks
+ built on it) to truecolor β like the existing Windows Terminal promotion β so
+ diff tints don't fall back to the colorless 16-color path when the terminal
+ doesn't advertise `COLORTERM`.
+- **Model/theme switches no longer reprint the welcome banner.** A same-session
+ reload (`/model`, `/theme`, `/thinking`, `/new`, fork, β¦) now keeps the
+ existing banner and shows only its own "Switched toβ¦ / Reloadingβ¦"
+ confirmation, instead of stacking a redundant second welcome splash below it.
+ `/clear` and `/reload` still wipe the screen and reprint the banner.
- **Update notice no longer crowds the prompt.** The persistent "Restart to apply"
/ "Update available" line now renders as the last footer row β below the
status/clock line β instead of directly under the input box, keeping the input
@@ -26,6 +50,8 @@ GitHub Releases page; `0.8.0` is the new starting line.
so brew can't delete the in-use Cellar version mid-session; the new build is
staged side-by-side and goes live on restart.
+Upgrade with `pythinker update`, `pip install --upgrade pythinker-code==0.51.0`, or use the native installer for your platform from the [Releases page](https://github.com/Pythoughts-labs/pythinker-code/releases/latest).
+
## 0.50.0 (2026-06-20)
- **Silent native updates no longer crash a running session.** The downloaded
diff --git a/packages/linux-installer/README.md b/packages/linux-installer/README.md
index 7f18d0d7..c2666d0d 100644
--- a/packages/linux-installer/README.md
+++ b/packages/linux-installer/README.md
@@ -8,19 +8,19 @@ End-user install from the current GitHub Release:
```sh
# Debian / Ubuntu
-curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.50.0/pythinker-code_0.50.0_amd64.deb
-curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.50.0/pythinker-code_0.50.0_amd64.deb.sha256
-sha256sum -c pythinker-code_0.50.0_amd64.deb.sha256
-sudo dpkg -i pythinker-code_0.50.0_amd64.deb
+curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.51.0/pythinker-code_0.51.0_amd64.deb
+curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.51.0/pythinker-code_0.51.0_amd64.deb.sha256
+sha256sum -c pythinker-code_0.51.0_amd64.deb.sha256
+sudo dpkg -i pythinker-code_0.51.0_amd64.deb
sudo apt-get install -f # only needed if dependencies fail to resolve
# Fedora / RHEL / openSUSE
-curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.50.0/pythinker-code-0.50.0.x86_64.rpm
-curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.50.0/pythinker-code-0.50.0.x86_64.rpm.sha256
-sha256sum -c pythinker-code-0.50.0.x86_64.rpm.sha256
-sudo dnf install ./pythinker-code-0.50.0.x86_64.rpm
+curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.51.0/pythinker-code-0.51.0.x86_64.rpm
+curl -LO https://github.com/Pythoughts-labs/pythinker-code/releases/download/v0.51.0/pythinker-code-0.51.0.x86_64.rpm.sha256
+sha256sum -c pythinker-code-0.51.0.x86_64.rpm.sha256
+sudo dnf install ./pythinker-code-0.51.0.x86_64.rpm
# or, on openSUSE:
-sudo zypper install ./pythinker-code-0.50.0.x86_64.rpm
+sudo zypper install ./pythinker-code-0.51.0.x86_64.rpm
```
The package drops a single executable at `/usr/bin/pythinker` and a license
@@ -36,17 +36,17 @@ file at `/usr/share/doc/pythinker-code/LICENSE`.
## Build
```sh
-bash packages/linux-installer/build.sh 0.50.0
+bash packages/linux-installer/build.sh 0.51.0
```
Outputs to `dist/`:
-- `pythinker-code_0.50.0_amd64.deb`
-- `pythinker-code-0.50.0.x86_64.rpm`
+- `pythinker-code_0.51.0_amd64.deb`
+- `pythinker-code-0.51.0.x86_64.rpm`
The portable tarball used by `scripts/install-native.sh` is published by
the existing `release-pythinker-cli.yml` workflow under the cargo-dist
-target-triple naming (e.g. `pythinker-0.50.0-x86_64-unknown-linux-gnu.tar.gz`).
+target-triple naming (e.g. `pythinker-0.51.0-x86_64-unknown-linux-gnu.tar.gz`).
## CI
diff --git a/pyproject.toml b/pyproject.toml
index 5961c461..e334c745 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
[project]
name = "pythinker-code"
-version = "0.50.0"
+version = "0.51.0"
description = "Pythinker β an agentic CLI developed by Pythoughts-labs."
readme = "README.md"
requires-python = ">=3.12"
diff --git a/uv.lock b/uv.lock
index a3c066cb..3d2c6591 100644
--- a/uv.lock
+++ b/uv.lock
@@ -2515,7 +2515,7 @@ wheels = [
[[package]]
name = "pythinker-code"
-version = "0.50.0"
+version = "0.51.0"
source = { editable = "." }
dependencies = [
{ name = "agent-client-protocol" },