feat(opencode): support wildcard matching in agent config

[Haohao-end]

Issue for this PR

Closes #18898

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

This adds wildcard matching for agent config keys.

For example, a config like researcher/* now applies to existing agents such as researcher/agent-a instead of being treated as a literal agent name.

I kept exact agent config higher priority than wildcard matches, and added handling for wildcard disable/override order so later, more specific config can still restore the original agent correctly.

How did you verify your code works?

I tested locally with:

• cd packages/opencode && bun test --timeout 30000 test/agent/agent.test.ts
• cd packages/opencode && bun run typecheck
• bun turbo typecheck

I also added tests for:

• nested agent matching
• exact config overriding wildcard config
• later wildcard entries overriding earlier ones
• wildcard disable followed by a later override

Screenshots / recordings

Not applicable.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

[github-actions]

Hey! Your PR title Add wildcard support for agent config overrides doesn't follow conventional commit format.

Please update it to start with one of:

• feat: or feat(scope): new feature
• fix: or fix(scope): bug fix
• docs: or docs(scope): documentation changes
• chore: or chore(scope): maintenance tasks
• refactor: or refactor(scope): code refactoring
• test: or test(scope): adding or updating tests

Where scope is the package name (e.g., app, desktop, opencode).

See CONTRIBUTING.md for details.

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

Based on my search results, the current PR (18907) for "Add wildcard support for agent config overrides" appears to be the only PR addressing this specific feature.

The search results returned:

• PR feat(opencode): support wildcard matching in agent config #18907 (the current PR itself - excluded from duplicate consideration)
• PR feat(task): add model override for subagents #18528: "feat(task): add model override for subagents" - related to agent config overrides but specifically for model overrides, not wildcard patterns
• PR feat(task): Add subagent-to-subagent delegation with budgets, persistent sessions, and hierarchical session navigation #7756: "feat(task): Add subagent-to-subagent delegation..." - broader subagent feature, not directly related to this wildcard config change

No duplicate PRs found

[Haohao-end]

I didn't find a direct duplicate PR for wildcard matching in agent config.

I did notice some related prior work around subagents / task permissions / agent config behavior, but not this specific wildcard matching behavior for agent config keys.

If this needs design approval first, I'm happy to convert this to draft or wait for maintainer guidance.

[rekram1-node]

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