chore: regenerate SKILL.md after voyage-code-3 default

Mechanical regen via \`bun run gen:skill-docs --host all\` after the
template changes in the previous commit. Single-host regen leaves
other-host outputs stale and trips gen-skill-docs.test.ts; --host all
keeps every adapter (claude, codex, kiro, opencode, slate, cursor,
openclaw, hermes, gbrain) in sync.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

setup-gbrain/SKILL.md

@@ -845,7 +845,14 @@ with `GSTACK_DETECT_NO_CACHE=1` (busts the 60s cache). If the new
 ```bash
 BACKUP="$HOME/.gbrain/config.json.gstack-bak-$(date +%s)"
 mv "$HOME/.gbrain/config.json" "$BACKUP"
-if ! gbrain init --pglite --json; then
+# gstack default: voyage-code-3 (1024d) when VOYAGE_API_KEY is set — best for
+# code retrieval. Without the key, fall back to gbrain's own auto-selected
+# embedding provider chain (OpenAI 1536d when OPENAI_API_KEY is present, etc.).
+GBRAIN_EMBED_FLAGS=""
+if [ -n "${VOYAGE_API_KEY:-}" ]; then
+  GBRAIN_EMBED_FLAGS="--embedding-model voyage:voyage-code-3 --embedding-dimensions 1024"
+fi
+if ! gbrain init --pglite --json $GBRAIN_EMBED_FLAGS; then
   # Restore on failure
   mv "$BACKUP" "$HOME/.gbrain/config.json"
   echo "gbrain init failed. Your previous config was restored at $HOME/.gbrain/config.json." >&2
@@ -1052,10 +1059,18 @@ Then follow the same secret-read + verify + init flow as Path 1.
 ### Path 3 (PGLite local)
 
 ```bash
-gbrain init --pglite --json
+# gstack default: voyage-code-3 (1024d) when VOYAGE_API_KEY is set — code
+# retrieval beats general-purpose embeddings on real code queries (validated
+# A/B). Without the key, gbrain auto-selects (OpenAI 1536d when available).
+GBRAIN_EMBED_FLAGS=""
+if [ -n "${VOYAGE_API_KEY:-}" ]; then
+  GBRAIN_EMBED_FLAGS="--embedding-model voyage:voyage-code-3 --embedding-dimensions 1024"
+fi
+gbrain init --pglite --json $GBRAIN_EMBED_FLAGS
 ```
 
-Done. No network, no secrets.
+Done. No network, no secrets (beyond Voyage embedding API calls during sync, if
+`VOYAGE_API_KEY` is set — ~$0.18 per 1M tokens, pennies per repo).
 
 ### Path 4 (Remote gbrain MCP — HTTP transport with bearer token)
 
@@ -1135,7 +1150,15 @@ if [ -f "$HOME/.gbrain/config.json" ]; then
   BACKUP="$HOME/.gbrain/config.json.gstack-bak-$(date +%s)"
   mv "$HOME/.gbrain/config.json" "$BACKUP"
 fi
-if ! gbrain init --pglite --json; then
+# gstack default for local code-search PGLite: voyage-code-3 (1024d) when
+# VOYAGE_API_KEY is set. It wins the A/B over voyage-4-large and OpenAI
+# text-embedding-3-large on this codebase's symbol queries. Falls back to
+# gbrain's auto-selected provider when the key isn't present.
+GBRAIN_EMBED_FLAGS=""
+if [ -n "${VOYAGE_API_KEY:-}" ]; then
+  GBRAIN_EMBED_FLAGS="--embedding-model voyage:voyage-code-3 --embedding-dimensions 1024"
+fi
+if ! gbrain init --pglite --json $GBRAIN_EMBED_FLAGS; then
   if [ -n "${BACKUP:-}" ] && [ -f "$BACKUP" ]; then mv "$BACKUP" "$HOME/.gbrain/config.json"; fi
   echo "gbrain init failed. Existing config (if any) was restored. PGLite at ~/.gbrain/pglite/ may be in a partial state — \`rm -rf ~/.gbrain/pglite\` to reset." >&2
   echo "Continuing setup without local code search; you can re-run /setup-gbrain to retry." >&2

sync-gbrain/SKILL.md

@@ -821,7 +821,9 @@ BEFORE invoking the orchestrator:
   "Your brain queries (the `mcp__gbrain__*` tools) work via remote MCP, but
   symbol code search needs a local PGLite. Run `/setup-gbrain` and pick
   'Yes' at the new 'local code index' prompt (Step 4.5), or run
-  `gbrain init --pglite --json` directly. Continuing without code stage."
+  `gbrain init --pglite --json --embedding-model voyage:voyage-code-3 --embedding-dimensions 1024`
+  directly (drop the voyage flags if `VOYAGE_API_KEY` isn't set). Continuing
+  without code stage."
   Then proceed to Step 2 — the orchestrator's `runCodeImport()` and
   `runMemoryIngest()` will return SKIP per plan D12; only `runBrainSyncPush()`
   will run. Do NOT abort.
@@ -834,7 +836,8 @@ BEFORE invoking the orchestrator:
     1. Re-run /setup-gbrain — Step 1.5 offers Retry / Switch to PGLite /
        Switch brain mode / Quit (plan D4).
     2. Repair manually: mv ~/.gbrain/config.json ~/.gbrain/config.json.bak
-       && gbrain init --pglite --json
+       && gbrain init --pglite --json --embedding-model voyage:voyage-code-3 \
+          --embedding-dimensions 1024   (drop voyage flags if VOYAGE_API_KEY unset)
   Re-run /sync-gbrain after.
   ```
   Do NOT continue — the orchestrator would skip code+memory and only run