[FEATURE]: create and expose model-id environment variables for bash from CLI

[bdwelle]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

I have shell scripts and other code that runs from opencode (agents, skills, and tools) that need to be aware of which model the user has selected, for model-aware workflows.

For one, I want to be able to compare content generated by different models, and include model id / name in frontmatter.

Having the id of the currently selected model available also enables patterns like this -- using the SDK to query whatever model the user currently has selected in the TUI:

    const result = await opencodeClient.session.prompt({
      path: { id: session.data.id },
      body: {
        model: {
          providerID: process.env.OPENCODE_PROVIDER_ID,
          modelID: process.env.OPENCODE_MODEL_ID,
        },
        parts: [
          {
            type: "text",
            text: prompt,
          },
        ],
      },
    });

I see a few other feature requests that could be solved by this:
#10453
#10247
#6350
#9065
#9292
#7492

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• [FEATURE]: Add a variable {CURRENT_MODEL} for commands #10247: Add a variable {CURRENT_MODEL} for commands - directly requests exposing current model name to commands, same goal using different terminology
• [FEATURE]: add model identity info to system prompt #9065: Add model identity info to system prompt - related feature that adds model awareness to prompts
• [FEATURE]: Expose session context to child processes via environment variables #9292: Expose session context to child processes via environment variables - uses similar environment variable mechanism for other metadata
• [Bug] Primary agents lack identity awareness when user switches agents - cannot determine which agent is active #7492: Primary agents lack identity awareness - related identity awareness issue for agents

Feel free to ignore if none of these address your specific case.

[bdwelle]

I submitted a draft PR 10451 - create and expose model-id environment variables for bash from CLI that would provide a solution for this feature request.

[bdwelle]

Hi @ThDx

I'm trying to figure out if this would be a good addition to opencode. I've been using this on my own dev branch for a couple of weeks now and it's providing the functionality I'm looking for. As noted above, I think this feature would also address several other existing feature requests. I made a draft PR. Any chance you could have a look and let me know what you think?

🙏🏻