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>

scripts/gen-golden-install-parity-zcode.cjs

@@ -27,6 +27,11 @@ const VOLATILE_FILES = new Set([
   'gsd-core/CHANGELOG.md',
 ]);
 const HOOK_CONFIG_FILES = new Set(['settings.json', 'hooks.json']);
+// Kimi's native config.toml (#2095) — see tests/golden-install-parity.test.cjs'
+// HOOK_CONFIG_RELATIVE_PATHS comment for why this is an exact relative-path
+// exclusion rather than a HOOK_CONFIG_FILES basename entry (a basename entry
+// would also blind Codex's stable, platform-independent config.toml fixture).
+const HOOK_CONFIG_RELATIVE_PATHS = new Set(['.kimi/config.toml']);
 const EXCLUDED_PREFIXES = ['gsd-core/bin/lib/'];
 
 function buildParityManifest(configDir, root) {
@@ -36,6 +41,7 @@ function buildParityManifest(configDir, root) {
     const rel = path.relative(configDir, full).split(path.sep).join('/');
     if (VOLATILE_FILES.has(rel)) continue;
     if (HOOK_CONFIG_FILES.has(path.basename(rel))) continue;
+    if (HOOK_CONFIG_RELATIVE_PATHS.has(rel)) continue;
     if (EXCLUDED_PREFIXES.some((p) => rel.startsWith(p))) continue;
     const content = fs.readFileSync(full);
     const normalized = content.toString('utf8').split(root).join('<HOME>').split(PKG_VERSION).join('<VERSION>');