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Plugin API

The traits an extension implements.

Trait	Crate	Purpose
`Observer`	`ekos-observation-sdk`	`name()`, `async scan(&ScanContext) -> ObservationPackage`
`CompilerPass`	`ekos-compiler-core`	`name`, `dependencies`, `version`, `cache_inputs`, `async run(&mut PassContext)`
`EkosExtension`	`ekos` (cli)	`name`, `logic_version`, `observers`, `recovery_passes`, `async after_commit`, `mcp_tools`, `call_mcp_tool`
`SqlDialectParser`	`ekos-sql-dialect-sdk`	`name`, `sqlparser_dialect`, `preprocess`
`LlmProvider`	`ekos-recovery`	`model_name`, `async complete`, streaming variant
`KnowledgeStore`	`ekos-ledger`	read/write access to the ledger (writers: commit, simulation; the runtime holds it read-only)

All are injected by trait; there is no global mutable state. Guides: Plugin Architecture.