feat(harness): trigger-first skill descriptions, hybrid OpenClaw layout, opt-in --context block (GSTA-135)

Router lines and Hermes leads open with the skill's triggers; OpenClaw
defaults to hybrid (five task skills plus the router); --context writes the
routing block only into a named file, refusing SOUL.md and any new Hermes
rules file that would outrank one Hermes loads now.

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

scripts/gen-skill-docs.ts

@@ -27,6 +27,7 @@ import { rewriteCarvedSectionRefs, SKILL_BYTE_CEILING, usesLazySections } from '
 import { insertRuntimePreludes } from './resolvers/runtime-root';
 import { generateSharedPreambleFile, hoistsPreamble, SHARED_PREAMBLE_FILE } from './resolvers/preamble-hoist';
 import { extractVoiceTriggers } from './resolvers/voice-triggers';
+import { frontmatterList, withTriggerLead } from '../lib/skill-triggers';
 import { ALL_HOST_NAMES, resolveHostArg, getHostConfig } from '../hosts/index';
 import type { HostConfig } from './host-config';
 
@@ -489,7 +490,8 @@ function transformFrontmatter(content: string, host: Host): string {
   if (fmEnd === -1) return content;
   const frontmatter = content.slice(fmStart + 4, fmEnd);
   const body = content.slice(fmEnd + 4);
-  const { name, description } = extractNameAndDescription(content);
+  const { name, description: fullDescription } = extractNameAndDescription(content);
+  const description = fm.descriptionLead ? withTriggerLead(fullDescription, frontmatterList(content, 'triggers'), fm.descriptionLead) : fullDescription;
 
   // Description limit enforcement
   if (fm.descriptionLimit) {

scripts/host-config.ts

@@ -81,6 +81,12 @@ export interface HostConfig {
     descriptionLimit?: number | null;
     /** What to do when description exceeds limit. Default: 'error'. */
     descriptionLimitBehavior?: 'error' | 'truncate' | 'warn';
+    /**
+     * Put a trigger-first lead of at most this many chars on the first line of
+     * the description (lib/skill-triggers.ts withTriggerLead), for hosts whose
+     * skills index shows only the start of a description.
+     */
+    descriptionLead?: number;
     /** Additional frontmatter fields to inject (host-wide). */
     extraFields?: Record<string, unknown>;
     /**