Drive Codex install/uninstall through the descriptor-driven Host-Integration
Interface (declarative embedding adapter → engine surface dispatch) and fold
every positive `runtime === 'codex'` / `isCodex` projection into descriptor-driven
`runtime.hostBehaviors`. Install/uninstall output stays byte-parity-gated
(tests/fixtures/golden-install-parity/codex.json); no other runtime changes.
Three Context7-verified upgrades, each with a test on the user-reachable surface:
- Skill root → canonical $HOME/.agents/skills via a skills-kind `home` override,
with pre-move migration cleanup (stale ~/.codex/skills/gsd-* removed on install
and uninstall; user content preserved). Fixes getGlobalSkillsBase, writeManifest,
and the skill-manifest inventory to honor the override so --skills-root /
sync-skills / the manifest report the real location.
- Six new hooks.json lifecycle events (PreToolUse, PermissionRequest, PreCompact,
PostCompact, SubagentStop, UserPromptSubmit) shared by install + uninstall;
extendedHookEvents reconciled [] -> the schema-valid wired subset.
- Explicit `[agents] max_depth = 1` in the managed config.toml block, pinning the
negotiated dispatch.maxDepth:1 axis. validateCodexConfigSchema now permits a
known-scalar-only bare `[agents]` AgentsToml table (still rejects [[agents]] and
unknown-key break-forms, #2760); mergeCodexConfig preserves the user's own
AgentsToml scalars (max_threads etc.) instead of dropping them.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
