feat(backends): add OpenCode connectors

[matdev83]

Summary

• add OpenCode Go and Zen backend connectors
• split backend registration into smaller provider files
• add model catalog vendor resolution and OpenCode test coverage

Tests

• Not run (commit/PR request only)

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Review profile: ASSERTIVE

Plan: Pro

Run ID: 830fd8b2-5997-4257-ba73-3602eef9c540

📥 Commits

Reviewing files that changed from the base of the PR and between 2ae8508 and 7840bac.

📒 Files selected for processing (142)

• Makefile
• cmd/lipstd/testdata/dogfood-local-stub/inventory.golden.json
• cmd/lipstd/testdata/dogfood-local-stub/routes.golden.json
• cmd/model-inventory-proof/main.go
• config/config.yaml
• config/examples/anthropic-stub.yaml
• config/examples/dogfood-local-stub.yaml
• config/examples/gemini-stub.yaml
• config/examples/openai-legacy-stub.yaml
• config/examples/openai-responses-stub.yaml
• docs/release-gates.md
• internal/archtest/backend_lifecycle_contract_test.go
• internal/archtest/opencode_boundaries_test.go
• internal/core/modelcatalog/doc.go
• internal/core/modelcatalog/matcher.go
• internal/core/modelcatalog/ports.go
• internal/core/modelcatalog/vendor.go
• internal/core/modelcatalog/vendor_policy.go
• internal/core/modelcatalog/vendor_resolver.go
• internal/core/modelcatalog/vendor_resolver_test.go
• internal/core/runtime/executor_local_stub_integration_test.go
• internal/infra/modelcatalog/modelsdev/normalize_test.go
• internal/infra/runtimebundle/build.go
• internal/infra/runtimebundle/build_modelcatalog_test.go
• internal/infra/runtimebundle/exclusive_registry_test.go
• internal/infra/runtimebundle/modelcatalog_attach.go
• internal/infra/runtimebundle/modelregistry_build_test.go
• internal/infra/runtimebundle/opencode_zen_registry_live_test.go
• internal/infra/runtimebundle/security_policy_test.go
• internal/infra/runtimebundle/sqlite_closer_test.go
• internal/infra/runtimebundle/token_accounting_build_test.go
• internal/pluginreg/backend_model_inventory_config_test.go
• internal/pluginreg/backend_prefix_inventory_test.go
• internal/pluginreg/backend_security_test.go
• internal/pluginreg/backends_anthropic.go
• internal/pluginreg/backends_bedrock.go
• internal/pluginreg/backends_gemini.go
• internal/pluginreg/backends_install.go
• internal/pluginreg/backends_misc.go
• internal/pluginreg/backends_ollama.go
• internal/pluginreg/backends_openai.go
• internal/pluginreg/backends_opencode.go
• internal/pluginreg/backends_openrouter.go
• internal/pluginreg/bedrock_acp_install_regression_test.go
• internal/pluginreg/build_backend_test.go
• internal/pluginreg/custom_backend_prefix_test.go
• internal/pluginreg/custom_backends.go
• internal/pluginreg/custom_compatible_build_test.go
• internal/pluginreg/hosted_backend_build_test.go
• internal/pluginreg/keys.go
• internal/pluginreg/llamacpp_build_test.go
• internal/pluginreg/lmstudio_build_test.go
• internal/pluginreg/localstub_build_test.go
• internal/pluginreg/ollama_build_test.go
• internal/pluginreg/opencode_backends_test.go
• internal/pluginreg/reg.go
• internal/pluginreg/registry_ownership_test.go
• internal/pluginreg/registry_zero_test.go
• internal/pluginreg/resolve_upstream_api_keys_test.go
• internal/pluginreg/spec_bundle_standard_inventory_test.go
• internal/pluginreg/standard_bundle_posture_test.go
• internal/pluginreg/standard_bundle_test.go
• internal/pluginreg/standard_table.go
• internal/pluginreg/validate_test.go
• internal/pluginreg/vllm_build_test.go
• internal/plugins/backends/anthropic/caps.go
• internal/plugins/backends/anthropic/count_tokens.go
• internal/plugins/backends/anthropic/plugin.go
• internal/plugins/backends/gemini/caps.go
• internal/plugins/backends/gemini/plugin.go
• internal/plugins/backends/ollama/inventory_test.go
• internal/plugins/backends/openaicompat/backend.go
• internal/plugins/backends/opencodecommon/backend.go
• internal/plugins/backends/opencodecommon/backend_test.go
• internal/plugins/backends/opencodecommon/catalog/canonical.go
• internal/plugins/backends/opencodecommon/catalog/canonical_test.go
• internal/plugins/backends/opencodecommon/catalog/catalog.go
• internal/plugins/backends/opencodecommon/catalog/catalog_test.go
• internal/plugins/backends/opencodecommon/catalog/doc.go
• internal/plugins/backends/opencodecommon/catalog/flavor.go
• internal/plugins/backends/opencodecommon/catalog/flavor_test.go
• internal/plugins/backends/opencodecommon/catalog/inventory.go
• internal/plugins/backends/opencodecommon/catalog/inventory_test.go
• internal/plugins/backends/opencodecommon/catalog/loader.go
• internal/plugins/backends/opencodecommon/catalog/loader_test.go
• internal/plugins/backends/opencodecommon/catalog/model.go
• internal/plugins/backends/opencodecommon/catalog/parse.go
• internal/plugins/backends/opencodecommon/catalog/parse_test.go
• internal/plugins/backends/opencodecommon/catalog/source.go
• internal/plugins/backends/opencodecommon/catalog/vendor_policy.go
• internal/plugins/backends/opencodecommon/catalog/vendor_resolver_test.go
• internal/plugins/backends/opencodecommon/catalog/wire.go
• internal/plugins/backends/opencodecommon/catalog/wire_test.go
• internal/plugins/backends/opencodecommon/doc.go
• internal/plugins/backends/opencodecommon/endpoint.go
• internal/plugins/backends/opencodecommon/endpoint_test.go
• internal/plugins/backends/opencodecommon/export.go
• internal/plugins/backends/opencodecommon/lifecycle_contract_test.go
• internal/plugins/backends/opencodecommon/transport.go
• internal/plugins/backends/opencodecommon/transport_test.go
• internal/plugins/backends/opencodego/backend_test.go
• internal/plugins/backends/opencodego/plugin.go
• internal/plugins/backends/opencodezen/backend_test.go
• internal/plugins/backends/opencodezen/plugin.go
• internal/plugins/backends/protocols/anthropicmessages/assistant_output_stream.go
• internal/plugins/backends/protocols/anthropicmessages/backend.go
• internal/plugins/backends/protocols/anthropicmessages/caps.go
• internal/plugins/backends/protocols/anthropicmessages/default_caps.go
• internal/plugins/backends/protocols/anthropicmessages/errors_classify.go
• internal/plugins/backends/protocols/anthropicmessages/invoke.go
• internal/plugins/backends/protocols/anthropicmessages/invoke_fuzz_test.go
• internal/plugins/backends/protocols/anthropicmessages/invoke_test.go
• internal/plugins/backends/protocols/anthropicmessages/lifecycle_contract_test.go
• internal/plugins/backends/protocols/anthropicmessages/map_events.go
• internal/plugins/backends/protocols/anthropicmessages/map_events_concurrency_test.go
• internal/plugins/backends/protocols/anthropicmessages/map_events_fuzz_test.go
• internal/plugins/backends/protocols/anthropicmessages/map_events_internal_test.go
• internal/plugins/backends/protocols/anthropicmessages/testdata/fuzz/FuzzHandleMessageStreamEventUnion/corpus_text_delta
• internal/plugins/backends/protocols/anthropicmessages/testdata/fuzz/FuzzToolInputSchemaParametersJSON/corpus_schema
• internal/plugins/backends/protocols/geminigenerate/backend.go
• internal/plugins/backends/protocols/geminigenerate/caps.go
• internal/plugins/backends/protocols/geminigenerate/default_caps.go
• internal/plugins/backends/protocols/geminigenerate/errors_classify.go
• internal/plugins/backends/protocols/geminigenerate/errors_classify_test.go
• internal/plugins/backends/protocols/geminigenerate/invoke.go
• internal/plugins/backends/protocols/geminigenerate/invoke_fuzz_test.go
• internal/plugins/backends/protocols/geminigenerate/invoke_test.go
• internal/plugins/backends/protocols/geminigenerate/lifecycle_contract_test.go
• internal/plugins/backends/protocols/geminigenerate/map_events.go
• internal/plugins/backends/protocols/geminigenerate/map_events_fuzz_test.go
• internal/plugins/backends/protocols/geminigenerate/map_events_internal_test.go
• internal/plugins/backends/protocols/geminigenerate/testdata/fuzz/FuzzBuildToolsParametersJSON/corpus_schema
• internal/plugins/backends/protocols/geminigenerate/testdata/fuzz/FuzzHandleGenerateContentResponse/corpus_candidates
• internal/plugins/backends/protocols/geminigenerate/testdata/fuzz/FuzzMessageToContentToolResultJSON/corpus_tool
• internal/stdhttp/server.go
• internal/stdhttp/standard_wiring_roundtrip_test.go
• internal/stdhttp/testdata/dogfood_gemini_dual_stub_failover.yaml
• internal/testkit/fuzz_test.go
• internal/testkit/opencodetest/harness.go
• pkg/lipsdk/standard_bundle.go
• pkg/lipsdk/standard_bundle_opencode_test.go
• scripts/opencode-go-e2e.ps1

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