Fix OMOS bunx detection

entrypoint-user.sh gated OMOS auto-install on 'command -v bunx', but
neither upstream bun installer nor our Dockerfile creates a bunx
symlink — only the bun binary exists on PATH. The check always failed
on a fresh OMOS image, printing 'ENABLE_OMOS=true but bun is not
installed.' even though bun was right there. Latent until now because
the only exercised path had a persisted oh-my-opencode-slim.json from
a prior install.

Fixes:
- Gate on 'command -v bun' instead of bunx.
- Call 'bun x oh-my-opencode-slim@latest install ...' (bun x is the
  real subcommand that actually works with only the bun binary).
- Add 'ln -sf bun /usr/local/bin/bunx' in the Dockerfile OMOS block
  so interactive users can still type bunx by habit.
- Smoke test asserts the bunx symlink exists on the OMOS variant.

Also verify 'test -L /usr/local/bin/bunx' as a build-time sanity check.
Can't use 'bunx --help' for that — bun exits 1 on help output even
though it prints the usage correctly.

CHANGELOG.md

@@ -6,6 +6,16 @@ Tags follow `v{opencode_version}[letter]` — bare tag for the first build on a
 
 ---
 
+## v1.14.29b — 2026-04-29
+
+**Fix OMOS `bunx` detection.**
+
+- **Fix:** `entrypoint-user.sh` checked `command -v bunx` to gate the OMOS auto-install, but the OMOS image only ships the `bun` binary — upstream's bun installer never creates a `bunx` symlink and neither did our Dockerfile. The check always failed on a fresh OMOS image, so `bun x oh-my-opencode-slim@latest install` never ran and first-start OMOS setup would have printed `ENABLE_OMOS=true but bun is not installed.` even though bun was right there. Latent until now because the only exercised path had a persisted `oh-my-opencode-slim.json` from a prior install.
+  - Changed the gate to `command -v bun`.
+  - Changed both install invocations from `bunx oh-my-opencode-slim@latest install ...` to `bun x oh-my-opencode-slim@latest install ...`.
+  - Added `ln -sf bun /usr/local/bin/bunx` to the Dockerfile's OMOS block so interactive users can still type `bunx` by habit, and verified the symlink during build.
+  - Smoke test now asserts the `bunx` symlink is present on the OMOS variant.
+
 ## v1.14.29 — 2026-04-28
 
 **Opencode 1.14.29 + infrastructure and maintainability pass.**

Dockerfile

@@ -284,8 +284,10 @@ RUN if [ "${INSTALL_OMOS}" = "true" ]; then \
       unzip -o /tmp/bun.zip -d /tmp/bun && \
       mv /tmp/bun/bun-linux-${BUN_ARCH}/bun /usr/local/bin/bun && \
       chmod +x /usr/local/bin/bun && \
+      ln -sf bun /usr/local/bin/bunx && \
       rm -rf /tmp/bun /tmp/bun.zip && \
       bun --version && \
+      test -L /usr/local/bin/bunx && \
       npm install -g oh-my-opencode-slim@${OMOS_VERSION}; \
     fi
 

entrypoint-user.sh

@@ -53,7 +53,7 @@ OMOS_CONFIG="$CONFIG_DIR/oh-my-opencode-slim.json"
 OMOS_CONFIG="$CONFIG_DIR/oh-my-opencode-slim.json"
 
 if [ "${ENABLE_OMOS:-false}" = "true" ]; then
-  if ! command -v bunx &>/dev/null; then
+  if ! command -v bun &>/dev/null; then
     echo "WARNING: ENABLE_OMOS=true but bun is not installed."
     echo "Rebuild with: docker compose build --build-arg INSTALL_OMOS=true"
   elif [ ! -f "$OMOS_CONFIG" ]; then
@@ -70,7 +70,7 @@ if [ "${ENABLE_OMOS:-false}" = "true" ]; then
       OMOS_SKILLS_FLAG="no"
     fi
 
-    bunx oh-my-opencode-slim@latest install \
+    bun x oh-my-opencode-slim@latest install \
       --no-tui \
       --tmux="${OMOS_TMUX_FLAG}" \
       --skills="${OMOS_SKILLS_FLAG}"
@@ -87,7 +87,7 @@ if [ "${ENABLE_OMOS:-false}" = "true" ]; then
       OMOS_SKILLS_FLAG="yes"
       [ "${OMOS_SKILLS:-true}" = "false" ] && OMOS_SKILLS_FLAG="no"
 
-      bunx oh-my-opencode-slim@latest install \
+      bun x oh-my-opencode-slim@latest install \
         --no-tui \
         --tmux="${OMOS_TMUX_FLAG}" \
         --skills="${OMOS_SKILLS_FLAG}" \

scripts/smoke-test.sh

@@ -107,6 +107,7 @@ fi
 # bun: only in the omos variant
 if [ "$VARIANT" = "omos" ]; then
   run "bun (omos)"            "bun --version"
+  run "bunx symlink (omos)"   "test -L /usr/local/bin/bunx && readlink /usr/local/bin/bunx"
   # oh-my-opencode-slim is npm-installed globally (not a bun install);
   # verify it shows up in the global module list.
   run "oh-my-opencode-slim"   "npm ls -g --depth=0 2>/dev/null | grep oh-my-opencode-slim"