Set up PStack agent profiles for OpenCode

OpenCode selects subagents by agent ID. A profile can set its own model, or inherit the current session model. OpenCode does not load PStack's model sheet from the instructions array and does not accept Claude's per-call model or subagent_type fields.

Current profiles

• pstack-agent is the default PStack worker and inherits the current session model.
• pstack-reviewer is read-only and inherits the current session model.
• pstack-comment-sicko is the read-only comment reviewer and inherits the current session model.

The profiles are defined in maxstack/opencode/agents/ and installed under ~/.config/opencode/agents/ for each runtime. Do not edit an installed copy. Edit the source profile and rerun the runtime installer.

Add a model override

1. Use /models in the target project and choose a model that the provider makes available there.
2. Confirm the exact provider/model ID and any supported #variant.
3. Add that value to the chosen profile's model frontmatter. Omit model when the profile should inherit the current session model.
4. Run a fresh PStack subagent session and inspect its reported model before relying on the override.

This setup does not generate per-role profiles or promise multi-model diversity. OpenChamber Multi-run can compare models in separate sessions, but the parent must still perform PStack's judging and synthesis steps.