# Tool config mount cleanup

## Problem

The built-in tool definitions currently declare configuration and state mounts that belong in user-controlled config profiles:

- The `pi-agent` manifest mounts `pi_state` (`/tmp/.pi/agents`) and `pi_config` (`/home/user/.pi`) via a `git_mount` reference.
- The `opencode` built-in compose template mounts a named volume `opencode_home:/tmp` and sets `HOME=/tmp`.

These require manual configuration or implicit state persistence, which conflicts with the design that tool configs should only set up the actual tool, while config profiles handle user-specific configuration and state.

## Decision

Remove all configuration/state mounts from built-in tool definitions. Tool configs will declare only:

- Runtime environment (packages, user, command, ports).
- The workspace/repository mount.
- SSH key mounts supplied by the platform.

User-specific configuration and state will be handled exclusively by config profiles.

## Scope

- Remove `pi_state` and `pi_config` mounts from the `pi-agent` manifest.
- Update the original migration that inserts the `pi-agent` manifest.
- Add a data migration to remove those mounts from existing `tool_definition_manifests` rows.
- Remove the `opencode_home:/tmp` volume and `HOME=/tmp` override from the `opencode` built-in compose template.

## Non-goals

- No changes to config profile behavior.
- No changes to workspace or SSH key mounts.
- No changes to tool image Dockerfiles beyond what is required by mount removal.