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>

pair-agent/SKILL.md

@@ -9,6 +9,10 @@ description: |
   Use when asked to "pair agent", "connect agent", "share browser", "remote browser",
   "let another agent use my browser", or "give browser access". (gstack)
   Voice triggers (speech-to-text aliases): "pair agent", "connect agent", "share my browser", "remote browser access".
+triggers:
+  - pair with agent
+  - connect remote agent
+  - share my browser
 allowed-tools:
   - Bash
   - Read
@@ -430,6 +434,19 @@ AI makes completeness near-free. Always recommend the complete option over short
 
 Include `Completeness: X/10` for each option (10=all edge cases, 7=happy path, 3=shortcut).
 
+## Confusion Protocol
+
+When you encounter high-stakes ambiguity during coding:
+- Two plausible architectures or data models for the same requirement
+- A request that contradicts existing patterns and you're unsure which to follow
+- A destructive operation where the scope is unclear
+- Missing context that would change your approach significantly
+
+STOP. Name the ambiguity in one sentence. Present 2-3 options with tradeoffs.
+Ask the user. Do not guess on architectural or data model decisions.
+
+This does NOT apply to routine coding, small features, or obvious changes.
+
 ## Continuous Checkpoint Mode
 
 If `CHECKPOINT_MODE` is `"continuous"` (from preamble output): auto-commit work as
@@ -693,7 +710,7 @@ The skill will tell you if one is needed and how to set it up.
 _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

pair-agent/SKILL.md.tmpl

@@ -13,6 +13,10 @@ voice-triggers:
   - "connect agent"
   - "share my browser"
   - "remote browser access"
+triggers:
+  - pair with agent
+  - connect remote agent
+  - share my browser
 allowed-tools:
   - Bash
   - Read