Fold Claude Code's install/uninstall onto the Embeddable Orchestration System
(ADR-1239 Phase D). claude is GSD's tier-1 reference host, but its install path
was still driven by 13 hardcoded `runtime === 'claude'` string-equality branches
scattered across bin/install.js rather than the public Host-Integration Interface.
- Route install()/uninstall() through `createImperativeAdapter({runtime})` — the
adapter delegates to the SAME installRuntimeArtifacts/uninstallRuntimeArtifacts
engine calls, so output is byte-identical (proven pre/post, both scopes).
- Replace all 13 `runtime === 'claude'` / `runtime !== 'claude'` branches with
descriptor-driven `runtime.hostBehaviors` lookups on capabilities/claude/
capability.json (attributionSource, authorsCanonicalWorkflow, localInstallStyle,
permissionsSchema, settingsFileByScope, sourceMarkerFile, agentFrontmatterExtensions,
ownsClaudePaths, nativeModelAliases, skillsGlobalOnboarding). Behavior is
identical; the brittle string-equality coupling (the add-a-host tax) is gone.
- Single-source the scattered literal 'claude' defaults/rosters behind DEFAULT_RUNTIME.
- Extend golden-install-parity to assert the claude LOCAL legacy layout is
byte-identical too (AC1 "both scopes"); exclude the platform-varying
settings.local.json (same reason settings.json is excluded).
- New tests/claude-imperative-reference.test.cjs: adapter kind, programmatic-cli
profile, fail-closed negotiation on a corrupted/partial descriptor, and an AC2
source guard that no `runtime === 'claude'` branch remains.
No user-visible install-output change (internal architecture only).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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