feat: OpenCode hook bridge plugin#225
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Add a TypeScript plugin that bridges OpenCode's native tool.execute.before/after hooks to Symposium's canonical hook pipeline. The plugin is embedded in the cargo-agents binary and installed to .opencode/plugins/symposium.ts during init. Rust side: - opencode.rs now returns Symposium-native event handlers for all 4 hook events - symposium.rs gains AgentHookOutput impls for per-event output structs - agents/mod.rs registers/unregisters the plugin file with @generated header, upgrade detection, and user-managed file safety Plugin behavior: - tool.execute.before: applies updatedInput to args, stashes deny/context - tool.execute.after: injects stashed warnings and additionalContext into output - Cannot block tool execution; denied hooks surface as agent-visible warnings Co-authored-by: Claude <claude@anthropic.com>
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What does this PR do?
Add a TypeScript plugin that bridges OpenCode's native tool.execute.before/after hooks to Symposium's canonical hook pipeline. The plugin is embedded in the cargo-agents binary and installed to .opencode/plugins/symposium.ts during init.
Rust side:
Plugin behavior:
Disclosure questions
AI disclosure.
Questions for reviewers.