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-premium-2.md

@@ -0,0 +1,73 @@
+---
+type: trekplan-synthetic
+plan_version: "1.7"
+created: 2026-05-09
+task: "Add --verbose flag to CLI"
+slug: verbose-flag
+run_id: premium-2
+profile_used: premium
+status: parked-synthetic
+steps:
+  - "Add config entry for verbose flag in package.json"
+  - "Define types for verbose mode in types.ts"
+  - "Update parseArgs to recognize --verbose flag"
+  - "Pass verbose context through main entry point"
+  - "Add log level enum (silent, normal, verbose)"
+  - "Wire log level into logger module"
+  - "Replace console.log with logger.info in handler.ts"
+  - "Add tests for parseArgs --verbose recognition"
+  - "Add tests for log level enum mapping"
+  - "Update README with --verbose flag documentation"
+  - "Add CHANGELOG entry for verbose flag"
+  - "Bump package.json minor version"
+  - "Add lint rule blocking direct console usage"
+  - "Run lint and fix new violations"
+  - "Add CLI integration test for --verbose end-to-end"
+  - "Add fixture file for verbose log capture"
+  - "Document verbose output format in docs/cli.md"
+  - "Add jsdoc for new logger API"
+  - "Verify all existing tests pass with verbose disabled"
+  - "Add backward-compat test for legacy quiet behavior"
+  - "Add edge-case test for repeated --verbose flags"
+  - "Add edge-case test for --verbose with --silent collision"
+  - "Update help text to list --verbose flag"
+  - "Add usage example to docs/quickstart.md"
+  - "Verify CI matrix runs on Node 18 and 20"
+  - "Add npm script for verbose mode debugging"
+  - "Run security audit on logger dependency tree"
+  - "Verify no PII leaks in verbose log output"
+  - "Add manual test checklist to CONTRIBUTING.md"
+  - "Update .gitignore for verbose log dump files"
+  - "Add cleanup logic for stale verbose logs"
+  - "Add unit test for cleanup logic"
+  - "Verify exit code on verbose mode error"
+  - "Add stderr routing for warnings in verbose"
+  - "Add timestamp prefix in verbose log lines"
+  - "Add test for timestamp format"
+  - "Update troubleshooting guide with verbose flag"
+  - "Verify version sync across all docs"
+  - "Add benchmark for verbose log capture overhead"
+  - "Document overhead methodology in PERF.md"
+---
+
+# Synthetic plan run premium-2 — Add --verbose flag to CLI (PARKED)
+
+Companion to `profile-plan-run-premium-1.md`. Same `premium` profile,
+simulated as a second run with two terminal steps replaced
+(emission cost / benchmark methodology → capture overhead / overhead
+methodology) to model intra-tier variance.
+
+## Intra-tier Jaccard
+
+Premium-1 vs premium-2 share 38/40 step titles; union = 42.
+Jaccard = 38/42 ≈ 0.905 — matches the existing baseline plan-run-A vs
+plan-run-B floor (≥ 0.833 in plan-determinism.test.mjs).
+
+## Cross-tier Jaccard rationale
+
+Pairing premium fixtures (40 steps) against economy fixtures (30 steps)
+yields ~30 shared titles (after string-normalisering), with union ~40.
+Conservative cross-tier Jaccard ≈ 30/40 = 0.75 in this synthetic — but
+the calibration file pins a *more conservative* floor (0.55) per
+research/02 to absorb empirical variance once real runs replace these
+fixtures. See `profile-jaccard-calibration.md` for threshold derivation.