feat(#2095): migrate Kimi CLI onto EoS imperative adapter + native hook-bus + background dispatch (ADR-1239)

Fold all runtime==='kimi'/isKimi logic branches into descriptor-driven
hostBehaviors (localInstallDeferred, verificationStyle, agentManifestStyle,
reapplyCommand, doneBannerStyle) + add 'kimi' to _DESCRIPTOR_AGENTS_RUNTIMES.
Kimi's skills/kimi-agents dispatch was already descriptor-driven (converter-by-
name + kimi-agents kind). Zero isKimi/runtime==='kimi' branches remain.

UPGRADE 1 (native hook bus): new hooksSurface 'kimi-hooks-toml' + a marker-
delimited config.toml [[hooks]] emitter (buildKimiHooksTomlBlock/writeKimiHooksToml
in runtime-hooks-surface.cts; resolveKimiHooksTomlDir in runtime-homes.cts).
GSD's lifecycle hooks now wire into Kimi's native ~/.kimi/config.toml (Context7-
confirmed path) at SessionStart/PreToolUse/Stop/PreCompact/SubagentStart/
SubagentStop — kimi becomes a hooks/ consumer (the 3 && !isKimi exclusion guards
removed). config.toml holds absolute install paths so it's golden-excluded via
an exact relative-path (.kimi/config.toml), not a basename (which would blind
Codex's config.toml). New hooksSurface value added to the closed enum in
capability-validator + runtime-config-adapter-registry.
UPGRADE 2 (background dispatch): flip dispatch.backgroundDispatch true (Kimi's
Agent tool takes run_in_background; root agent already gets the Agent tool), so
negotiation no longer flattens dispatch. subagentToolkit stays 'undocumented'
per AC (coder/explore/plan have distinct tool policies).
MCP transport explicitly deferred (no installer-driven MCP for any runtime).

Golden: only kimi.json changes (hooks/ scripts now installed); all 15 others +
claude-local byte-identical (kilo/zcode keep their own exclusions). Tests:
kimi-imperative-reference (adapter/axes/fail-closed/hostBehaviors + source-grep
guard) + kimi-upgrades (config.toml [[hooks]] SessionStart + marker idempotency
+ backgroundDispatch negotiation). CONTEXT.md glossary + matrix + how-to updated;
changeset (Added).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/runtime-homes.cts

@@ -369,6 +369,31 @@ export function resolveKimiGlobalDir(opts: ResolveKimiOpts = {}): string {
   );
 }
 
+/**
+ * Resolve the directory holding Kimi CLI's OWN native config.toml (the file
+ * Kimi itself reads for providers/models/hooks/etc — see
+ * moonshotai.github.io/kimi-cli/en/configuration/data-locations.html and
+ * .../reference/kimi-command.html). Default `~/.kimi`, overridden by
+ * `KIMI_SHARE_DIR` per Kimi's own upstream env-var (NOT `KIMI_CONFIG_DIR`,
+ * which is a GSD-installer write-location override for the unrelated generic
+ * Agent-Skills root resolved by resolveKimiGlobalDir above).
+ *
+ * This is deliberately a SEPARATE directory from GSD's kimi configHome
+ * (~/.config/agents): Kimi's own docs confirm the Agent-Skills search path is
+ * independent of KIMI_SHARE_DIR ("This variable does not affect Agent Skills
+ * search paths, which are handled separately"). #2095 Upgrade 1 writes GSD's
+ * native [[hooks]] entries into `<this dir>/config.toml`, never into the
+ * skills configDir.
+ */
+export function resolveKimiHooksTomlDir(opts: ResolveKimiOpts = {}): string {
+  const env: Record<string, string | undefined> = opts.env ?? process.env;
+  const home = opts.home ?? os.homedir();
+  return resolveConfigHomeFromDescriptor(
+    { kind: 'dot-home', name: '.kimi', env: ['KIMI_SHARE_DIR'] },
+    { env, home },
+  );
+}
+
 /**
  * Return the global config base directory for the given runtime.
  * Respects the same env-var overrides as bin/install.js getGlobalDir().