fix(cli): restart opencode automatically when src/mcp/ changes

OpenCode caches the MCP tool list at connect time. When the bot adds
or modifies tools (anything under src/mcp/), the bot rebuild updates
the server but OpenCode keeps serving the stale list — new tools
don't show up in /mcps until something kicks the connection.

The --update flow now detects diffs in src/mcp/ and runs
\`docker compose restart opencode\` after the bot rebuild. ~2s extra,
no full rebuild of opencode (its image is unchanged), and the next
prompt sees the fresh tool list.

Skipped when rebuild_opencode is already true (a full rebuild includes
the restart anyway).

CLI doc updated to mention the new behavior.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: JohanYP

bin/opencode-assistant

@@ -202,6 +202,7 @@ cmd_update() {
   changed_files=$(git -C "$REPO_DIR" diff --name-only HEAD..origin/main)
 
   local rebuild_bot=false rebuild_opencode=false rebuild_workspace=false
+  local restart_opencode=false
   if echo "$changed_files" | grep -qE '^(src/|package(-lock)?\.json|tsconfig\.json|Dockerfile$|docker-compose\.yml$)'; then
     rebuild_bot=true
   fi
@@ -213,6 +214,15 @@ cmd_update() {
     rebuild_workspace=true
   fi
 
+  # The MCP server lives inside the bot container — when its tools list
+  # changes (src/mcp/*), the bot rebuild updates the server but OpenCode
+  # caches the old tool list at connect time and won't see new tools
+  # until it reconnects. Force a restart to drop the cached list.
+  # Skip when rebuild_opencode is already true (a full rebuild includes restart).
+  if echo "$changed_files" | grep -qE '^src/mcp/' && ! $rebuild_opencode; then
+    restart_opencode=true
+  fi
+
   # 4. Resumen
   echo ""
   echo "Changed files:"
@@ -232,6 +242,9 @@ cmd_update() {
   else
     info "Will rebuild: ${BOLD}${rebuilds[*]}${NC}"
   fi
+  if $restart_opencode; then
+    info "Will restart opencode to pick up new MCP tools"
+  fi
 
   # 5. Pull
   info "Pulling..."
@@ -253,6 +266,10 @@ cmd_update() {
     info "Rebuilding workspace-mcp..."
     dc_workspace up -d --build
   fi
+  if $restart_opencode; then
+    info "Restarting opencode (MCP tool list refresh)..."
+    dc restart opencode
+  fi
 
   # 7. Healthcheck post-update
   echo ""

docs/CLI_USAGE.md

@@ -34,6 +34,7 @@ What it does, in order:
    - Changed `src/`, `package*.json`, `tsconfig.json`, `Dockerfile`, or `docker-compose.yml` → rebuild **bot**.
    - Changed `Dockerfile.opencode` or `docker/opencode-entrypoint.sh` → rebuild **opencode**.
    - Changed `Dockerfile.workspace-mcp` (if you have the side-car) → rebuild **workspace-mcp**.
+   - Changed `src/mcp/` (new MCP tools added) → restart **opencode** (no rebuild) so it re-fetches the tool list.
    - Anything else (docs, README, GitHub Actions) → no rebuild needed.
 4. `git pull --ff-only`.
 5. Rebuilds only the services that need it (`docker compose up -d --build <service>` for each).