docs(ultraplan-local): D5 close-out — repo cleanup pre-voyage-rebrand [skip-docs]

D5 — final session of post-v3.4.1 stabilisering. Repo prepared for the
upcoming voyage-rebrand (v4.0.0 hard cut: ultraplan-local → voyage,
/ultra*-local → /trek*).

Tracked changes:
- README.md: cut #9 jargon — '### Self-verifying plan chain' →
  '### Manifest-verified steps' with body rewritten to drop the
  'objective completion predicate' jargon.
- package.json: removed 'simulate' script that pointed to
  tests/simulator/run-pipeline.mjs (file never existed; D3 was
  dropped before that work shipped).
- .claude-plugin/marketplace.json: ultraplan-local description
  updated from 'Four-command pipeline' to the current six-command
  shape with Handover 6 + multi-session resumption (matches
  plugin.json).
- docs/_archive-ultra-suite-brief_2.md: deleted (tracked planning-doc
  unrelated to ultraplan-local; 117 lines, no inbound references).

Untracked cleanup (not in commit, gitignored):
- 4 stale plugin-root .local.md (NEXT-SESSION-PROMPT.archived,
  PLAN-v2.1-phase3, V3.0-MULTI-SESSION-PLAN, etc.)
- 3 docs/ planning .local.md (ultracontinue-brief, ultracontinue-design-notes,
  ultraexecute-v2-observations)
- examples/01-add-verbose-flag/perf-baseline.local.md
- .claude/plans/ultraplan-2026-04-17-logger.md
- 9 closed sub-projects under .claude/projects/ (skill-factory,
  ultracontinue, ultrareview-local, ultra-pipeline-speedup,
  examples-02-real-cli, post-v3.4.0-roadmap, spor-c-q3-cache,
  v3.3.1-ultracontinue-fixes)

Cuts #7 (template-duplisering) + #10 (Two kinds of briefs) reviewed
and judged not needed: README has 38 code-fences vs CLAUDE.md 2 (no
overlap), and 'Two kinds of briefs' is already a direct task-vs-
research-brief explanation, not jargon.

D3 + D4 droppet 2026-05-05 — voyage-rebrand renames all ultra*
references; new test infrastructure built against the old names
would need to be renamed in the same pass. Memory pin:
feedback_cleanup_vs_new_code.md.

Tests: 361 / 0 (unchanged — no test changes).
Stabilisering close-out: complete. Repo is ready for voyage-rebrand.

plugins/ultraplan-local/package.json

@@ -7,8 +7,7 @@
     "node": ">=18"
   },
   "scripts": {
-    "test": "node --test 'tests/**/*.test.mjs'",
-    "simulate": "node tests/simulator/run-pipeline.mjs"
+    "test": "node --test 'tests/**/*.test.mjs'"
   },
   "keywords": [
     "claude-code",