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-artifact-conversion.cts

@@ -505,6 +505,14 @@ function convertGsdCommandReferencesToKimiSkillInvocations(content, cmdNames) {
     .replace(hyphenPattern, (_, cmd) => `/skill:gsd-${cmd}`);
 }
 
+// DEFECT.GENERATIVE-FIX: this body is mirrored in bin/install.js's
+// convertClaudeCommandToKimiSkill (kept for bin/install.js's own
+// module-level export/test surface; dead for the live skills-install path,
+// which routes here via install-engine.cts's SKILLS_CONVERTER_REGISTRY
+// through the kimi capability descriptor's artifactLayout
+// `converter: "convertClaudeCommandToKimiSkill"`). Neither copy re-exports
+// the other — mirror any behavior change into both. Guarded by the
+// output-parity test in tests/runtime-converters.test.cjs (#2095).
 function convertClaudeCommandToKimiSkill(content, skillName, _runtime = null, cmdNames = null) {
   const { frontmatter, body } = extractFrontmatterAndBody(content);
   const kimiSkillName = normalizeKimiSkillName(skillName);
@@ -649,6 +657,15 @@ function buildKimiSubagentYaml({ name, description, tools }) {
   return `${lines.join('\n')}\n`;
 }
 
+// DEFECT.GENERATIVE-FIX: this body is mirrored in bin/install.js's
+// buildKimiAgentArtifacts (kept for bin/install.js's own module-level
+// export/test surface; dead for the live install path, which routes here via
+// runtime-artifact-layout.cts's kimiAgentsKind through a dynamic
+// `conversionExports['buildKimiAgentArtifacts']` lookup against this
+// compiled module). Neither copy re-exports the other — mirror any behavior
+// change into both, including the kimi_cli.tools.agent:Agent grant that
+// enables background dispatch (#2095 Upgrade 2). Guarded by the
+// output-parity test in tests/runtime-converters.test.cjs (#2095).
 function buildKimiAgentArtifacts({
   rootAgent = '',
   subagents = [],