Certify OpenCode adapter against the v1 approval contract #279

Decision

Retain OpenCode and raise it from its current installed integration to the same evidence-backed certified-adapter standard as Claude, Codex, and Pi.

Current state

The adapter uses an OpenCode plugin for blocking tool.execute.before approvals and session-event mapping. It is not currently in the certified contract.

Certification requirements

• Verify the current official plugin API, global/project scope behavior, and compatible OpenCode versions.
• Add a versioned contract/capability report for managed install/uninstall, integrity/drift, approval decision/edit mapping, lifecycle/recovery, audit/redaction, and plugin reload/replacement behavior.
• Test approve, deny, expiry, edit, global/project installation, daemon-unavailable, timeout, plugin reload, restart, and session exit with provider-shaped fixtures; add a secret-gated live evidence path.
• Keep onibi adapters --json, hooks --show, and doctor exact about proven capability and limitations.

Promotion gate

OpenCode becomes certified only after every contract claim has local tests, a documented live result, and review.