feat: add context configuration (compaction/compression/cache) support

[dobesv]

Summary

Adds context management configuration to agents, including:

• Event compaction/compression: Configurable compaction of conversation history to reduce context size while preserving key information, with optional LLM-based summarization
• Context caching: Prefix context caching at the provider level to reduce redundant processing
• UI support: New ContextSection component for configuring compaction and caching in the agent creation/edit form

This is a subset of #1323, split per reviewer feedback to include only the context configuration changes (compaction/compression/cache), holding back the memory and resumability config changes for a follow-up PR.

Changes

Go (CRD + Controller)

• Added ContextConfig, ContextCompressionConfig, ContextCacheConfig, and ContextSummarizerConfig types to v1alpha2 Agent CRD
• Added AgentContextConfig, AgentCompressionConfig, and AgentCacheConfig to the ADK config types (go/pkg/adk/types.go)
• Added context config translation in adk_api_translator.go including summarizer model resolution
• Regenerated deepcopy and CRD manifests

Python (ADK Runtime)

• Added ContextCompressionSettings, ContextCacheSettings, and ContextConfig Pydantic models
• Added build_adk_context_configs() to convert config to ADK native types
• Wired events_compaction_config and context_cache_config through KAgentApp → App → Runner
• Added unit tests for context config parsing and ADK object construction

UI (Next.js)

• Added ContextSection component with compaction and cache configuration forms
• Added ContextConfig and related TypeScript types
• Integrated ContextSection into agent create/edit page

Dependencies

• Added @radix-ui/react-switch for toggle UI components
• Updated google-adk minimum version to >=1.25.0

[Copilot]

Pull request overview

This pull request adds context management configuration support to agents, enabling event compaction/compression and context caching. The implementation spans the entire stack from UI to Python runtime, with proper type definitions, validation, and test coverage.

Changes:

• Added context configuration types and UI components for managing event compaction and context caching
• Implemented Go CRD schema, translator logic, and deployment data merging for summarizer models
• Added Python ADK integration with proper config parsing and ADK native type construction

Reviewed changes

Copilot reviewed 20 out of 22 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
ui/src/types/index.ts	Added TypeScript interfaces for context configuration (compaction, cache, summarizer)
ui/src/components/ui/switch.tsx	New Switch component for toggle UI using Radix UI primitives
ui/src/components/create/ContextSection.tsx	Context management configuration form with compaction and cache settings
ui/src/components/AgentsProvider.tsx	Added context field to AgentFormData and validation errors
ui/src/app/agents/new/page.tsx	Integrated ContextSection component into agent creation page
ui/src/app/actions/agents.ts	Pass context config from form data to agent spec
ui/package.json, ui/package-lock.json	Added @radix-ui/react-switch dependency
python/uv.lock	Updated google-adk (>=1.25.0) and other dependencies (google-auth, google-genai, litellm, mcp, pydantic, httpx)
python/samples/adk/basic/pyproject.toml	Updated google-adk minimum version to 1.25.0
python/packages/kagent-adk/tests/unittests/test_context_config.py	Comprehensive unit tests for context config parsing and ADK conversion
python/packages/kagent-adk/src/kagent/adk/types.py	Added context config Pydantic models and build_adk_context_configs function
python/packages/kagent-adk/src/kagent/adk/cli.py	Wired context config through KAgentApp initialization
python/packages/kagent-adk/src/kagent/adk/_a2a.py	Added context config parameters to KAgentApp and App initialization
python/packages/kagent-adk/pyproject.toml	Updated dependencies and removed memory extra (deferred to follow-up PR)
helm/kagent-crds/templates/kagent.dev_agents.yaml	Added context config schema to Agent CRD
go/pkg/adk/types.go	Added AgentContextConfig, AgentCompressionConfig, AgentCacheConfig types
go/internal/controller/translator/agent/adk_api_translator_test.go	Added tests for context config translation and deployment data merging
go/internal/controller/translator/agent/adk_api_translator.go	Implemented context config translation and mergeDeploymentData function
go/config/crd/bases/kagent.dev_agents.yaml	Generated CRD with context config schema
go/api/v1alpha2/zz_generated.deepcopy.go	Generated DeepCopy methods for new context config types
go/api/v1alpha2/agent_types.go	Added CRD types for context management (ContextConfig, ContextCompressionConfig, ContextCacheConfig, ContextSummarizerConfig)

Files not reviewed (1)

• ui/package-lock.json: Language not supported

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