diff --git a/Dockerfile b/Dockerfile
index 447918fd..9e6ccc5d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ RUN touch src/main.rs && cargo build --release
 
 # --- Runtime stage ---
 FROM debian:bookworm-slim
-RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl unzip && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl procps unzip && rm -rf /var/lib/apt/lists/*
 
 # Install kiro-cli (auto-detect arch, copy binary directly)
 ARG KIRO_CLI_VERSION=2.0.0
diff --git a/Dockerfile.claude b/Dockerfile.claude
index 32803a0d..4a309794 100644
--- a/Dockerfile.claude
+++ b/Dockerfile.claude
@@ -8,7 +8,7 @@ RUN touch src/main.rs && cargo build --release
 
 # --- Runtime stage ---
 FROM node:22-bookworm-slim
-RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl procps && rm -rf /var/lib/apt/lists/*
 
 # Install claude-agent-acp adapter and Claude Code CLI
 ARG CLAUDE_CODE_VERSION=2.1.104
diff --git a/Dockerfile.codex b/Dockerfile.codex
index 228e67c8..a2de9f3e 100644
--- a/Dockerfile.codex
+++ b/Dockerfile.codex
@@ -8,7 +8,7 @@ RUN touch src/main.rs && cargo build --release
 
 # --- Runtime stage ---
 FROM node:22-bookworm-slim
-RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl procps && rm -rf /var/lib/apt/lists/*
 
 # Pre-install codex-acp and codex CLI globally
 ARG CODEX_VERSION=0.120.0
diff --git a/Dockerfile.copilot b/Dockerfile.copilot
index 3a68fb8f..d1033ef1 100644
--- a/Dockerfile.copilot
+++ b/Dockerfile.copilot
@@ -8,7 +8,7 @@ RUN touch src/main.rs && cargo build --release
 
 # --- Runtime stage ---
 FROM node:22-bookworm-slim
-RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl procps && rm -rf /var/lib/apt/lists/*
 
 # Install GitHub Copilot CLI via npm (pinned version)
 ARG COPILOT_VERSION=1.0.25
diff --git a/Dockerfile.gemini b/Dockerfile.gemini
index 863a7ba1..484553ff 100644
--- a/Dockerfile.gemini
+++ b/Dockerfile.gemini
@@ -8,7 +8,7 @@ RUN touch src/main.rs && cargo build --release
 
 # --- Runtime stage ---
 FROM node:22-bookworm-slim
-RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl procps && rm -rf /var/lib/apt/lists/*
 
 # Install Gemini CLI (native ACP support via --acp)
 ARG GEMINI_CLI_VERSION=0.37.2