- Introduce `hostHTTPOperationBridge` to manage, claim, and cancel host HTTP operations with scoped cleanups
- Scope HTTP operations and streams to specific plugin instances to isolate lifecycles and prevent cross-plugin access
- Add RPC handlers for `MethodHostHTTPOperationOpen` and `MethodHostHTTPCancel`
- Link operation cancellation and resource cleanup to host callback contexts and stream termination
Closes: #6085
- Introduce `modelExecutionStatusError` to retain explicit HTTP status codes on model execution errors
- Propagate HTTP status codes from callback errors across Unix and Windows host callback dispatchers
- Update `marshalRPCError` to encode HTTP status codes into error envelopes using `pluginabi.NewErrorEnvelope`
Closes: #5970
- Ensure `methodBytes` and `request` are kept alive across dynamic library invocation on Windows to prevent premature garbage collection.
Closes: #5807
- Added `rpcPluginError` to encapsulate plugin errors with HTTP status codes.
- Enhanced `decodeEnvelopeResult` to preserve and return detailed plugin errors with status codes.
- Introduced `isPluginErrorEnvelope` to identify plugin error envelopes.
- Updated plugin call logic in Unix and Windows loaders to differentiate plugin errors from system errors.
- Added unit tests to verify error handling and status code preservation.
- Updated host model callback logic to skip originating plugin's interceptors during nested model executions.
- Added `SkipInterceptorPluginID` field to plugin API structs for controlling interceptor bypass behavior.
- Introduced supporting logic in host API handlers, plugin host registry, and callback contexts to identify and skip specific plugins.
- Enhanced unit tests across plugin host, API handlers, and execution paths to verify interceptor skipping behavior and plugin isolation.
- Revised documentation to clarify non-recursive behavior of host model callbacks and the use of `SkipInterceptorPluginID`.
- Updated `golang.org/x/sys` to v0.38.0 in `go.mod` and replaced `syscall` with `windows` package for memory allocation in `loader_windows.go`.
- Improved cross-compilation in `.goreleaser.yml` using Zig-based toolchains for better platform support.
- Changed GitHub Actions workflow to use macOS runners and added Zig toolchain setup.
- Removed `examples/plugin/main.go` and `internal/pluginhost/loader_plugin.go` after migrating to a more modular system.
- Introduced `streamBridge` in `internal/pluginhost/stream_bridge.go` for efficient stream handling and communication.
- Added examples of `thinking` plugins written in both Rust and Go under `examples/plugin/thinking`.
- Enhanced test coverage for plugin host system changes, including stream chunk translation and thinking logic.
- Improved API compatibility and ensured backward-compatible upgrades for plugin execution.
