devcontainer_exec: command param treated as single executable, compound shell commands fail

[aniongithub]

Problem

devcontainer_exec passes the command parameter as argv[0] directly to the OCI runtime, not through a shell. This means:

1. Multi-word commands fail — command: "echo hello" looks for a binary literally named echo hello:

   OCI runtime exec failed: exec: "echo hello": executable file not found in $PATH
   

2. Workaround requires splitting command/args — command: "echo", args: "hello" works, but breaks down for compound commands.

3. Compound shell commands with quotes get mangled — passing bash as command and -lc "cd /foo && bar -c baz.yml -o out.html" as args fails with:

   unexpected EOF while looking for matching `"`
   

What works today

command: bash
args: -c cd /workspaces/forgewright && forgewright visualize -c forgewright.yml

But this is fragile — &&, pipes, and flags can be misinterpreted depending on how the args string is tokenized.

Expected behavior

Either:

• Option A: command should be passed through a shell so compound commands work
• Option B: args should preserve the entire string as-is (no splitting/re-quoting)
• Option C: Add a shell: true option that wraps command + args in sh -c

Environment

• devcontainer-mcp (MCP tool)
• macOS, Docker Desktop
• devcontainer CLI 0.86.0