merge: integrate origin/main (v0.18.1.0) into open-agents-learnings

Main moved forward 6 commits while this branch was local. Integrated
both sides preserving all functionality:

From main (v0.16.4.0 → v0.18.1.0):
- v0.17.0.0 — UX behavioral foundations + ux-audit (generateUXPrinciples,
  {{UX_PRINCIPLES}} placeholder, triggers frontmatter on skills)
- v0.18.0.0 — Confusion Protocol, Hermes + GBrain hosts, brain-first
  resolver (generateBrainHealthInstruction, generateConfusionProtocol,
  generateGBrainContextLoad, generateGBrainSaveResults, hosts/gbrain.ts,
  hosts/hermes.ts, scripts/resolvers/gbrain.ts, GBrain bash health check)
- v0.18.0.1 — ngrok Windows build fix
- 0cc830b6 — tilde-in-assignment permission fix
- cc42f14a — gstack compact design doc (tabled)
- 822e843a — headed browser auto-shutdown + disconnect cleanup (v0.18.1.0)

Integration approach: keep this branch's preamble.ts submodule refactor
as the structure of record. Extracted main's two new generators into
their own submodules:
- scripts/resolvers/preamble/generate-brain-health-instruction.ts
- scripts/resolvers/preamble/generate-confusion-protocol.ts

Updated scripts/resolvers/preamble/generate-preamble-bash.ts to absorb
main's GBrain health check (host-conditional on gbrain/hermes).

scripts/resolvers/index.ts now imports BOTH:
- This branch's adds: MODEL_OVERLAY, TASTE_PROFILE, BIN_DIR resolvers
- Main's adds: UX_PRINCIPLES, GBRAIN_CONTEXT_LOAD, GBRAIN_SAVE_RESULTS
  resolvers

scripts/resolvers/design.ts keeps both generateTasteProfile (this
branch) and generateUXPrinciples (main). Sibling exports, no overlap.

scripts/gen-skill-docs.ts keeps both this branch's --model flag wiring
and main's edits.

Templates auto-merged where possible. The 35 generated SKILL.md /
golden conflicts auto-resolved via `bun run gen:skill-docs --host all`
followed by re-snapshotting the ship goldens for claude/codex/factory.

Verification:
- bun run gen:skill-docs --host all completes cleanly
- bun test: 1 pre-existing failure (gstack-community-dashboard Supabase
  network test, 235s timeout). NOT related to merge — unchanged Supabase
  test infra times out without live network. Flagged in PR body.

Token-ceiling warnings on plan-ceo-review (29K), office-hours (26K),
and ship (34K). These existed on origin/main before the merge — the
preamble grew substantially from main's GBrain + UX additions plus this
branch's continuous-checkpoint, context-health, model-overlay, taste-profile,
and feature-discovery additions. Worth a follow-up reduction pass but
doesn't block this merge.

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

setup-browser-cookies/SKILL.md

@@ -7,6 +7,10 @@ description: |
   Opens an interactive picker UI where you select which cookie domains to import.
   Use before QA testing authenticated pages. Use when asked to "import cookies",
   "login to the site", or "authenticate the browser". (gstack)
+triggers:
+  - import browser cookies
+  - login to test site
+  - setup authenticated session
 allowed-tools:
   - Bash
   - Read
@@ -503,7 +507,7 @@ If `CDP_MODE=true`: tell the user "Not needed — you're connected to your real
 _ROOT=$(git rev-parse --show-toplevel 2>/dev/null)
 B=""
 [ -n "$_ROOT" ] && [ -x "$_ROOT/.claude/skills/gstack/browse/dist/browse" ] && B="$_ROOT/.claude/skills/gstack/browse/dist/browse"
-[ -z "$B" ] && B=~/.claude/skills/gstack/browse/dist/browse
+[ -z "$B" ] && B="$HOME/.claude/skills/gstack/browse/dist/browse"
 if [ -x "$B" ]; then
   echo "READY: $B"
 else

setup-browser-cookies/SKILL.md.tmpl

@@ -7,6 +7,10 @@ description: |
   Opens an interactive picker UI where you select which cookie domains to import.
   Use before QA testing authenticated pages. Use when asked to "import cookies",
   "login to the site", or "authenticate the browser". (gstack)
+triggers:
+  - import browser cookies
+  - login to test site
+  - setup authenticated session
 allowed-tools:
   - Bash
   - Read