[Bug]: container-use terminal has an issue with source mounting.

[andrewwhitecdw]

What happened?

Summary: container-use terminal has an issue with source mounting. Use this Docker command instead for an interactive shell:

This happens on my machine and I am unsure if it is reproducible. x86 Linux.

Error: input: container-use: load: missing required argument: "source"
What's Happening

Root Cause: container-use terminal fails with "missing required argument: source" when trying to start an interactive shell in an existing environment.

Steps to Reproduce

1. Create a container-use environment (via MCP or CLI)
2. Run container-use terminal
3. Error: load: missing required argument: "source"
   Environment Config (.container-use/environment.json)

{
workdir: /workdir,
base_image: mcr.microsoft.com/playwright:v1.40.0-jammy,
setup_commands: [
npx playwright install chromium --with-deps
]
}

Attempted Fixes (Failed)

1. Added "source": "." to environment.json - Same error
2. Passed source via CLI - No CLI flag documented for terminal subcommand
3. Checked container-use terminal --help - No --source or similar option

Expected Behavior
container-use terminal should:

1. Start the container from the environment's base image
2. Mount the project directory (inferred from .container-use/ location)
3. Provide an interactive bash shell

Actual Behavior
Container fails to start with Dagger-level error about missing "source" argument.
Technical Context

Component	Value
container-use version	Latest (via zerobrew)
Environment	stable-mammal, flying-pangolin
Base image	mcr.microsoft.com/playwright:v1.40.0-jammy
Platform	WSL2 (Ubuntu)
Project dir	snip
Workaround
Direct Docker command works fine:
docker run -it --rm \
-v /snip:/workdir \
-w /workdir \
mcr.microsoft.com/playwright:v1.40.0-jammy \
bash
Suggested Fix
The terminal subcommand should either:

1. Auto-detect source from .container-use/ parent directory
2. Accept --source flag to explicitly set mount point
3. Document required config field if source must be in environment.json

---

Ticket Title: container-use terminal fails with "missing required argument: source"
Labels: bug, terminal, source-mount

Version

container-use version 0.4.2
commit: 89ebe7765ec067a07c51de104822056eb217c1b9
built: 2025-08-19T22:23:38Z

Logs