Why: the full-agent batch (Agent-Native PR #3, Agent-Squad PR #3) made
roles capable of declaring model/tools/skills/bash execution, but the
product composition root had no path to register the kernel backend or
inject search/exec/skills config.
Evidence: go vet ./... clean; go test ./... 19 packages ok. New cases:
buildBackends registers agent-native only when composition-root options
are enabled (default backend stays agent-system, per the parity
progressive-enablement clause) and resolves explicit
Backend:agent-native roles; InterpreterExecConfigForKernel validates
absolute interpreter paths and the env whitelist reused from the
product exec tools.
Impact: deps/agent-native pinned to f9ab2ef and deps/agent-squad to
9a402e4; app.go resolves settings.models.chat, tools.tavily.*,
runtime.exec, and <data>/skills into squad.AgentNativeConfig per run;
squadadapter exposes the AgentNativeOptions hook and buildBackends.
Refs: Dev task feature/full-agent-r1 batch B10.
weichen
87a3d0dbfb