feat(chat): decouple primitives from LangGraph via runtime-neutral ChatAgent contract#135

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feat/chat-runtime-decoupling-phase-1

Apr 22, 2026

Commits on Apr 21, 2026

docs(specs): add chat runtime decoupling design

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docs(specs): define ChatContentBlock in decoupling design

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docs(plans): add Phase 1 implementation plan for chat runtime decoupling

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feat(chat): add ChatAgent data types (message, tool call, content block, status)
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feat(chat): add ChatInterrupt, ChatSubagent, submit input/options types
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feat(chat): define ChatAgent runtime-neutral contract
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feat(chat): export ChatAgent contract from public-api
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docs(chat): document runtime-neutral ChatAgent and adapters
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chore(chat): add SPDX header to agent spec files
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docs(chat): clarify ChatSubmitInput.message JSDoc

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feat(chat): add mockChatAgent() test helper

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feat(chat): add ChatAgent conformance test suite

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refactor(chat): rename submit param to avoid shadowing in mockChatAgent

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feat(agent): add toChatAgent() adapter to runtime-neutral ChatAgent contract
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feat(agent): export toChatAgent
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test(agent): verify toChatAgent satisfies ChatAgent conformance
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refactor(agent): rename cryptoRandom to randomId; use for interrupt id fallback

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refactor: rename libs/agent to libs/langgraph; @cacheplane/angular to @cacheplane/langgraph

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refactor(chat): migrate chat-input to ChatAgent contract

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refactor(chat): migrate chat-messages to ChatAgent contract

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refactor(chat): migrate chat-tool-calls to ChatAgent contract

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refactor(chat): migrate chat-typing-indicator to ChatAgent contract

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refactor(chat): migrate chat-error to ChatAgent contract

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refactor(chat): drop redundant tool_use cast; rely on discriminant narrowing

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refactor(chat): migrate chat composition core path to ChatAgent

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chore(chat): mark remaining primitives as phase-2/phase-3 migration

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feat(chat): add ChatCustomEvent type and optional customEvents$ to ChatAgent

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test(chat): extend mock + conformance for customEvents\$
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feat(langgraph): bridge customEvents signal to Observable in toChatAgent

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refactor(chat): migrate chat-interrupt from AgentRef to ChatAgent

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refactor(chat): replace langgraphRef with ChatAgent.customEvents$ subscription

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refactor(chat): migrate chat-subagents from AgentRef to ChatAgent

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refactor(chat): migrate chat-subagent-card to ChatSubagent contract

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refactor(chat): migrate chat-interrupt-panel to ChatAgent contract

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refactor(chat,langgraph): relocate LangGraph-specific primitives to @cacheplane/langgraph

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refactor(chat): drop @cacheplane/langgraph peer-dep, breaking the circular edge

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refactor(cockpit): bind cockpit demos to ChatAgent via toChatAgent

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fix(chat,langgraph): final Phase-1 build fixes

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Commits on Apr 22, 2026