feat(voyage)!: marketplace handoff — rename plugins/ultraplan-local to plugins/voyage [skip-docs]

Session 5 of voyage-rebrand (V6). Operator-authorized cross-plugin scope.

- git mv plugins/ultraplan-local plugins/voyage (rename detected, history preserved)
- .claude-plugin/marketplace.json: voyage entry replaces ultraplan-local
- CLAUDE.md: voyage row in plugin list, voyage in design-system consumer list
- README.md: bulk rename ultra*-local commands -> trek* commands; ultraplan-local refs -> voyage; type discriminators (type: trekbrief/trekreview); session-title pattern (voyage:<command>:<slug>); v4.0.0 release-note paragraph
- plugins/voyage/.claude-plugin/plugin.json: homepage/repository URLs point to monorepo voyage path
- plugins/voyage/verify.sh: drop URL whitelist exception (no longer needed)

Closes voyage-rebrand. bash plugins/voyage/verify.sh PASS 7/7. npm test 361/361.

plugins/ultraplan-local/examples/01-add-verbose-flag/brief.md

@@ -1,55 +0,0 @@
----
-type: trekbrief
-brief_version: 1.0
-slug: add-verbose-flag
-task: Add a --verbose flag to the small-auth CLI parser
-research_topics: 1
-research_status: complete
-brief_quality: ready
-created: 2026-05-01
----
-
-# Add `--verbose` flag to small-auth CLI
-
-## Intent
-
-The `small-auth` CLI parser has six commands (`login`, `logout`, `whoami`,
-`token-refresh`, `users-list`, `users-create`) and currently emits only
-final results — no progress, no timings, no internal step trace. Operators
-debugging slow `token-refresh` calls or mis-routed `users-list` queries
-have no signal between "started" and "finished".
-
-We want a `--verbose` flag that, when passed, prints structured progress
-lines to stderr without changing stdout output. Stdout stays the
-machine-parseable contract; stderr becomes the human-readable trace.
-
-## Goal
-
-Add a single `--verbose` boolean flag, recognized by all six commands,
-that emits one stderr line per internal step. No other behavioral
-changes. The default (`--verbose` absent) produces output byte-identical
-to today's CLI.
-
-## Success Criteria
-
-- `small-auth login --verbose alice` exits 0 and writes ≥ 3 stderr lines
-  prefixed `[verbose]` covering: argument parse, credential lookup,
-  session-token issue.
-- `small-auth login alice` (no flag) writes exactly the same stdout as
-  before this change — verified by golden-file diff against
-  `tests/golden/login.stdout`.
-- `--verbose` works in any position: `small-auth --verbose login alice`,
-  `small-auth login --verbose alice`, `small-auth login alice --verbose`.
-- `--verbose` short form is `-v`. `-vv` is **not** recognized — only one
-  level. Document this in `--help`.
-- All six commands accept the flag without rejection. Commands that have
-  no internal steps to trace (`whoami`) still accept the flag silently.
-- Existing 24 tests in `tests/` continue to pass. Two new tests added:
-  one stdout-stability test, one stderr-content test for `login`.
-
-## Out of scope
-
-- Log levels beyond on/off (no `--debug`, `--trace`).
-- Structured JSON logging — stderr stays plain text in this iteration.
-- Logging configuration via env vars or config file.
-- Any command other than the six listed.