fix(agent-manager): allow explicit provider selection

[marius-kilocode]

What Problem This Solves

Agent Manager model-name resolution previously relied on the invoking provider and fallback ranking. Callers could not select a specific provider when the same model name was available from multiple providers.

Why This Change Was Made

Each Agent Manager task now accepts an optional provider beside model. The provider is trimmed and scoped to the available catalog before exact, name, fuzzy, and variant matching. Unknown providers, provider/model mismatches, provider-only requests, and malformed provider values fail safely without requesting Agent Manager permission.

Model-only requests keep the existing inherited-provider preference and deterministic tie-break behavior. The resolved event still carries only the concrete model reference, so protocol and SDK artifacts do not need regeneration.

User Impact

Callers can use tasks[].provider with a model name to force a provider, for example { "model": "Shared", "provider": "anthropic" }. Model search output and Agent Manager documentation describe the new field and provider IDs.

Evidence

• bun test test/kilocode/agent-manager-tool.test.ts test/kilocode/agent-manager-models-tool.test.ts from packages/opencode, 43 tests passed.
• bun run typecheck from packages/opencode passed.
• bun run lint passed with zero errors and existing warnings.
• bun run script/check-opencode-annotations.ts --worktree passed.
• Prettier checks passed for all touched TypeScript files.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 files)

• packages/opencode/src/kilocode/tool/agent-manager.ts

Previous Review Summary (commit 78692a7)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit 78692a7)

Status: No Issues Found | Recommendation: Merge

Files Reviewed (7 files)

• .changeset/explicit-agent-manager-provider.md
• packages/kilo-docs/pages/automate/agent-manager.md
• packages/opencode/src/kilocode/tool/agent-manager-models.ts
• packages/opencode/src/kilocode/tool/agent-manager-models.txt
• packages/opencode/src/kilocode/tool/agent-manager.ts
• packages/opencode/src/kilocode/tool/agent-manager.txt
• packages/opencode/test/kilocode/agent-manager-tool.test.ts

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[iscekic]

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