Goal

PawWork should send Kimi/Moonshot-compatible tool-call requests in a shape their APIs accept, without changing unrelated provider behavior or adding model-specific behavior patches.

Scope

In scope:

• Guard empty message content before provider requests where it can break Kimi/Moonshot-compatible endpoints.
• Keep the existing Moonshot/Kimi $ref schema sanitizer behavior, including preserving root $defs / definitions.
• Add conservative missing type normalization for Kimi/Moonshot tool schema properties.
• Ensure Kimi-like provider/model aliases are covered by the compatibility path.
• Add targeted regression tests in the provider transform test suite.

Out of scope:

• GitHub-specific behavior patches.
• Prompt tuning for Kimi.
• Context compaction changes.
• Loop detection or repeated successful tool-call gating, tracked separately by [Feature] Loop gate also covers low-yield successful repeats, not only failures #279.
• Broad provider transform refactors.

Relevant files or context

Likely files:

• packages/opencode/src/provider/transform.ts
• packages/opencode/test/provider/transform.test.ts
• packages/opencode/src/provider/pawwork-providers.ts

Context:

• Kimi Code CLI handles stricter Kimi-compatible behavior by dropping empty assistant tool-call content and normalizing tool schemas.
• Upstream OpenCode has related Kimi/Moonshot discussions, but not a complete PawWork-ready fix.
• This issue is PR1. The loop containment work remains PR2 and should close [Feature] Loop gate also covers low-yield successful repeats, not only failures #279 separately.

Verification

• Add regression coverage for empty content handling.
• Add regression coverage for $ref sibling cleanup while preserving root $defs / definitions.
• Add regression coverage for missing property type normalization.
• Add coverage that Kimi-like aliases enter the compatibility path.
• Run the targeted provider transform test file.
• Confirm unrelated provider paths are not changed by the new tests or implementation.

Execution mode

Agent should investigate and propose a plan first.