Remove dead INSTALL_PYTHON build arg

Python 3 has been unconditionally present since the Debian trixie
upgrade (e58962a, Apr 13) — python3 3.13 ships as a transitive
dependency of the trixie base image. python3-pip (e1029bb) and
python3-venv (3a7ec45) were later added to the base layer on Apr 23
so Mason could install Python-based LSPs (ruff, ansible-lint) into
venvs on nvim startup. MemPalace's pip install (b9c08c3) just
piggybacks on what was already there.

In other words, INSTALL_PYTHON=true has been a no-op reinstall of
already-installed packages for two weeks before MemPalace existed.
The flag is dead weight and the docs that advertise it as meaningful
are misleading. Remove it everywhere.

Users who want Python tooling should use the pre-installed uv/uvx.

.gitignore

@@ -9,3 +9,7 @@
 
 # Personal cloud-init overrides (not shared)
 deploy/my-cloud-init.yml
+
+# MemPalace per-project files (issue #185)
+mempalace.yaml
+entities.json

CHANGELOG.md

@@ -6,6 +6,10 @@ Tags follow `v{opencode_version}[letter]` — bare tag for the first build on a
 
 ---
 
+## Unreleased
+
+- **Cleanup:** Remove dead `INSTALL_PYTHON` build arg. Python 3 + pip + venv have been unconditionally installed in the base layer since mempalace was added; the flag was a no-op. Users should use `uv` (pre-installed) or `uvx` for Python tooling.
+
 ## v1.14.28b — 2026-04-27
 
 - **Feature:** Add MemPalace local-first AI memory system to base image. Provides 29 MCP tools for semantic search over conversation history, knowledge graph queries, and agent diaries. Palace data persists via optional `devbox-palace` named volume, ChromaDB embedding model cache via `devbox-chroma-cache`. No API keys required.

DOCKER_HUB.md

@@ -520,7 +520,6 @@ Everything in the base image, plus:
 
 When [building from source](https://gitea.jordbo.se/joakimp/opencode-devbox), additional runtimes are available via build args:
 
-- **Python 3** (`INSTALL_PYTHON=true`) — Python 3 + pip + venv
 - **Go** (`INSTALL_GO=true`) — Go toolchain
 
 ## oh-my-opencode-slim (OMOS variant)

Dockerfile

@@ -160,15 +160,7 @@ RUN ARCH=$(case "${TARGETARCH}" in \
     unzip -q /tmp/awscli.zip -d /tmp && \
     /tmp/aws/install && \
     rm -rf /tmp/aws /tmp/awscli.zip && \
-    aws --version
+     aws --version
-
-# ── Optional: Python ─────────────────────────────────────────────────
-ARG INSTALL_PYTHON=false
-RUN if [ "${INSTALL_PYTHON}" = "true" ]; then \
-      apt-get update && apt-get install -y --no-install-recommends \
-        python3 python3-pip python3-venv && \
-      rm -rf /var/lib/apt/lists/*; \
-    fi
 
 # ── Optional: Go ─────────────────────────────────────────────────────
 ARG INSTALL_GO=false

README.md

@@ -330,13 +330,12 @@ docker compose run --rm --build devbox
 Enable optional language runtimes or pin a specific opencode version:
 
 ```bash
-docker compose build --build-arg INSTALL_PYTHON=true --build-arg INSTALL_GO=true
+docker compose build --build-arg INSTALL_GO=true
 docker compose build --build-arg OPENCODE_VERSION=1.5.0
 ```
 
 | Arg | Default | Description |
 |---|---|---|
-| `INSTALL_PYTHON` | `false` | Python 3 + pip + venv |
 | `INSTALL_GO` | `false` | Go toolchain |
 | `INSTALL_OMOS` | `false` | [oh-my-opencode-slim](https://github.com/alvinunreal/oh-my-opencode-slim) multi-agent orchestration (installs Bun and plugin) |
 | `OMOS_VERSION` | `latest` | Pin a specific oh-my-opencode-slim version |

docker-compose.yml

@@ -23,7 +23,6 @@ services:
     # build:
     #   context: .
     #   args:
-    #     INSTALL_PYTHON: "false"
     #     INSTALL_GO: "false"
     #     INSTALL_OMOS: "false"
     container_name: opencode-devbox