feat(voyage): define high-effort behavior + amend brief Non-Goal/SC1 + coordinator normalization (Decision B)

Wave 6 / Step 10 — autonomy-gated. Operator confirmed: gemini-bridge
substitution for plan-critic doubling AND SC1 amendment to
resolver-invariant encoding (decisions.local.json recorded).

- commands/trekplan.md: gemini-bridge plan-review Pass 2 on
  post-revision plan in high-effort mode (replaces fragile
  plan-critic doubling per risk-assessor).
- commands/trekresearch.md: full swarm + contrarian-researcher +
  gemini-bridge always-on.
- commands/trekreview.md: skip Pass 3 reasonableness + invoke
  coordinator normalization rule.
- commands/trekexecute.md: gates_mode = closed (strict manifest-audit,
  main-merge pauses); flag override still wins.
- agents/review-coordinator.md: Pass 3 high-effort normalization —
  substitute unknown rule_key with PLAN_EXECUTE_DRIFT, preserve
  original in original_rule_key.
- .claude/projects/2026-05-13-trekflow-solo-lane/brief.md (gitignored,
  not committed): Non-Goal amendment locks low/high tiers; SC1
  amendment authorizes resolver-invariant interpretation.
- tests/lib/doc-consistency.test.mjs: +4 pins for the
  "### High-effort behavior (v5.1.1)" heading per command.

Tests: 578 pass, 0 fail, 2 skipped (+4 from 574).

Closes #7 (operator-gated decisions captured + coordinator
normalization landed).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

plugins/voyage/commands/trekresearch.md

@@ -481,6 +481,24 @@ without `phase_signals` or `phase_signals_partial: true`), halt with:
 /trekbrief to commit them (Phase 3.5).` Enforcement is validator-only;
 commands surface, don't re-enforce.
 
+### High-effort behavior (v5.1.1)
+
+When `phase_signal_result.effort == 'high'` for the `research` phase,
+run the FULL swarm regardless of normal triggering rules: 5 local
+agents + 4 external agents + 1 bridge agent, AND force
+`contrarian-researcher` AND `gemini-bridge` to always-on. Normally
+`contrarian-researcher` triggers conditionally when a leading
+recommendation is emerging from initial agents; in high-effort mode it
+runs unconditionally so the final brief always carries an adversarial
+counter-evidence pass. Similarly, `gemini-bridge` normally activates on
+significant architectural questions or when triangulation value is
+high; in high-effort mode it runs unconditionally to provide an
+independent second opinion.
+
+Standard effort (or absent): use the existing conditional triggers.
+Low effort: inline research only, no agent swarm (existing
+`--quick`-equivalent code-path).
+
 ## Hard rules
 
 - **No planning:** This command produces research briefs, not implementation plans.