test(voyage): empirical jaccard calibration — parked-synthetic placeholders + threshold pin

Step 17 of v4.1 — escalate-handler invoked. Live LLM-budget ($60-120 for
4 plan-runs á /trekplan --profile {economy,premium} on
examples/01-add-verbose-flag/brief.md) was not authorized for the
v4.1-execute-4b session.

Per Step 17 escalate-fallback (and NEXT-SESSION-PROMPT.local.md
fallback-strategy): document economy-Plan as parked, use balanced as
low-threshold profile, defer empirical calibration to v4.2.

Files:
  tests/synthetic/profile-plan-run-economy-1.md   — 30 steps, parked-synthetic
  tests/synthetic/profile-plan-run-economy-2.md   — 30 steps, parked-synthetic
  tests/synthetic/profile-plan-run-premium-1.md   — 40 steps, parked-synthetic
  tests/synthetic/profile-plan-run-premium-2.md   — 40 steps, parked-synthetic
  tests/synthetic/profile-jaccard-calibration.md  — threshold 0.55 pinned per
                                                    research/02 conservative starting value

Replacement procedure documented in calibration.md "How to replace"
section. Trigger conditions for empirical re-run:
  1. Cross-tier smoke-test (Step 18) flips red on a real run
  2. v4.2 LLM-budget approval
  3. New profile tier added

plugins/voyage/tests/synthetic/profile-plan-run-economy-2.md

@@ -0,0 +1,61 @@
+---
+type: trekplan-synthetic
+plan_version: "1.7"
+created: 2026-05-09
+task: "Add --verbose flag to CLI"
+slug: verbose-flag
+run_id: economy-2
+profile_used: economy
+status: parked-synthetic
+steps:
+  - "Add verbose flag config to package.json"
+  - "Update parseArgs to handle --verbose"
+  - "Add log level enum"
+  - "Wire log level into logger module"
+  - "Replace console.log calls with logger"
+  - "Add tests for parseArgs verbose"
+  - "Add tests for log level enum"
+  - "Update README with --verbose docs"
+  - "Add CHANGELOG entry for verbose flag"
+  - "Bump package.json minor version"
+  - "Add lint rule blocking console usage"
+  - "Run lint and fix violations"
+  - "Add CLI integration test for verbose"
+  - "Add fixture for verbose log capture"
+  - "Document verbose output format"
+  - "Add jsdoc for logger API"
+  - "Verify existing tests pass"
+  - "Add backward-compat test for quiet behavior"
+  - "Add edge-case test for repeated --verbose flags"
+  - "Update help text for --verbose"
+  - "Add usage example to quickstart"
+  - "Verify CI matrix on Node 18 and 20"
+  - "Add manual test checklist"
+  - "Update .gitignore for log dumps"
+  - "Add cleanup logic for stale logs"
+  - "Verify exit code on verbose error"
+  - "Add stderr routing for warnings"
+  - "Update troubleshooting guide"
+  - "Verify version sync across docs"
+  - "Add timestamp prefix to verbose lines"
+---
+
+# Synthetic plan run economy-2 — Add --verbose flag to CLI (PARKED)
+
+Companion fixture to `profile-plan-run-economy-1.md`. Same `economy`
+profile, simulated as a second run of the same brief, with one step
+replaced (benchmark → timestamp) to model intra-tier variance.
+
+See `profile-plan-run-economy-1.md` for full parked-synthetic rationale.
+
+## Intra-tier Jaccard
+
+Economy-1 vs economy-2 share 29/30 step titles (one differs); union = 31.
+Jaccard = 29/31 ≈ 0.935 — well above any reasonable cross-tier floor.
+This is the expected intra-tier band: small variance because the same
+profile produces near-identical plans modulo language drift.
+
+When real LLM-budget runs replace this synthetic, the empirical
+intra-tier Jaccard is expected to land in the 0.85–0.95 band per
+research/02. Cross-tier (economy vs premium) is the discriminating
+measurement and is documented in `profile-jaccard-calibration.md`.