Pass x-opencode-session for memory, roll-call, and expand-prompt calls

[intentionally-left-nil]

Issue

The previous fix for opencode's backend only resolved the main inference endpoints (that we share with opencode). Kilo has other entrypoints that use inference, and all of these need the x-opencode-session headers as well

Fixes #13723

Implementation

How to Test

kilo roll-call anthropic, using the vscode plugin with this fix, and using memory

Manual/local verification

TBD

Checklist

• Issue linked above, or exception explained
• Tests/verification described
• Screenshots/video included for visual changes, or marked N/A
• Changeset considered for user-facing changes
• I personally reviewed the diff and can explain the changes, including any AI-assisted work.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

The new opencodeSessionHeaders helper correctly mirrors the providerID.startsWith("opencode") gate and User-Agent used by LLMRequestPrep.prepare, and it is wired into all three direct AI SDK call sites (memory consolidation, roll-call, prompt enhancement). All touched files are Kilo-owned paths, so no upstream merge markers are needed. The required sessionID addition to MemoryPorts.ModelPort.run is applied consistently across the host adapter and kilo-memory callers, and the new tests exercise the real header plumbing rather than mocking it. No resource leaks introduced in the changed code.

Files Reviewed (9 files)

• .changeset/opencode-session-header-followup.md
• packages/kilo-memory/src/effect/capture.ts
• packages/kilo-memory/src/effect/ports.ts
• packages/opencode/src/kilocode/cli/cmd/roll-call.ts
• packages/opencode/src/kilocode/enhance-prompt.ts
• packages/opencode/src/kilocode/memory/ports.ts
• packages/opencode/src/kilocode/provider/opencode-session-headers.ts
• packages/opencode/test/kilocode/memory/memory-ports.test.ts
• packages/opencode/test/kilocode/provider/opencode-session-headers.test.ts

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_{Reviewed by deepseek-v4.1-flash · Input: 0 · Output: 0 · Cached: 0}

_{Review guidance: REVIEW.md from base branch main}