docs(readme): align first screen with the org repo standard

repo-standard gate (plugin class) flagged 6 ERROR. Fixed all six:

- README-DESC: H1 is now `# voyage` (was `# trekplan — …`, stale from the
  rename) and the opening line is byte-identical to the forge description,
  so description == catalog == README on all three surfaces.
- INSTALL-NO-CLI + HEADING-MISSING: new first-screen `## Install` with the
  CLI install command (`claude plugin install voyage@ktg-plugin-marketplace`)
  beside `marketplace add`; the `enabledPlugins` JSON is kept as the second
  form. Retires the duplicate `## Installation` section further down (its
  architect paragraph already exists verbatim under Quick start) and drops
  the now-redundant install lines from the Quick start block.
- HEADING-MISSING: `## Non-goals` (promotes the existing "What it doesn't
  solve" list) and `## Changelog` (release notes moved off the first screen,
  per the standard, now a link + one line per recent version — keeps the
  doc-consistency pin on framing / brief_version 2.2).

Remaining 3 gate ERROR are a classifier defect in the gate, not this repo:
directory link targets (`agents/`, `examples/observability/`) are checked
against `git ls-files`, which never contains directories. Links are correct
and left as-is by operator decision; reported to repo-standard via coord.

Suite: 832 tests, 829 pass, 1 fail, 2 skipped — the failure is the
load-dependent otel tail-latency NFR (passes 3/3 in isolation), unrelated.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PRYUCVByhmzWBMCCFSYK2j

README.md

@@ -1,4 +1,6 @@
-# trekplan — Brief, Research, Plan, Execute, Review, Continue
+# voyage
+
+Contract-driven Claude Code pipeline: brief, research, plan, execute, review. Agent swarms, research triangulation, adversarial review, multi-session resumption.
 
 ![Version](https://img.shields.io/badge/version-5.9.1-blue)
 ![License](https://img.shields.io/badge/license-MIT-green)
@@ -10,8 +12,6 @@
 
 A [Claude Code](https://docs.anthropic.com/en/docs/claude-code) plugin for deep implementation planning, multi-source research, autonomous execution, independent post-hoc review, and zero-friction multi-session resumption. Six commands, one pipeline:
 
-> **What's new — v5.8.0: offline gold-scored output eval (SKAL-1·4b).** The review-coordinator self-eval gains a scoring run: `lib/review/gold-scorer.mjs` grades a committed agent-run fixture against the golden corpus at `(file, rule_key)` granularity (precision/recall/f1 + verdict match), and the suite census gains a third category (`goldEval`) so a scoring run is counted apart from behavior coverage and doc-pins. Offline + deterministic — committed reviewer payloads, no live agent spawn (the LLM-in-the-loop tier is the separate 4c). Internal eval infrastructure; no command/agent/Handover change. **v5.7.1:** leaner always-loaded agent listing — `<example>` blocks relocated to agent bodies (~3,180 tok/turn, no behavior change). **v5.7.0:** opt-in per-session token/cost metering (SKAL-2) + eval foundation (SKAL-1·4a). **v5.6.1:** one-line `description:` for the four reference/dormant agents (~700 tok). **v5.5.0:** brief **framing** enforcement (`brief_version 2.2`) + a `/trekreview` reviewer-schema contract. Additive — no breaking changes. **Full version history → [CHANGELOG.md](CHANGELOG.md).**
-
 | Command | What it does |
 |---------|-------------|
 | **`/trekbrief`** | Brief — interactive interview produces a task brief with explicit research plan |
@@ -21,6 +21,23 @@ A [Claude Code](https://docs.anthropic.com/en/docs/claude-code) plugin for deep
 | **`/trekreview`** | Review — independent post-hoc review of delivered code against the brief, severity-tagged findings |
 | **`/trekcontinue`** | Continue — read `.session-state.local.json` and resume the next session in a multi-session project |
 
+## Install
+
+```bash
+claude plugin marketplace add https://git.fromaitochitta.com/open/ktg-plugin-marketplace.git
+claude plugin install voyage@ktg-plugin-marketplace
+```
+
+Or enable directly in `~/.claude/settings.json`:
+
+```json
+{
+  "enabledPlugins": {
+    "voyage@ktg-plugin-marketplace": true
+  }
+}
+```
+
 `/trekbrief`, `/trekplan`, and `/trekreview` each end by running `scripts/annotate.mjs` against the just-written artifact and printing the resulting `file://<abs path>` link. The operator opens the HTML in a browser, clicks any line of the document, writes their own note in the inline textarea, watches a sidebar of all notes (editable, deletable, persisted in browser `localStorage`), and clicks "Copy Prompt" to get one structured prompt that they paste back into Claude — Claude then revises the `.md` from the notes. **The operator drives every annotation.** See [Reviewing and annotating artifacts](#reviewing-and-annotating-artifacts-v502).
 
 Every artifact lives in one project directory: `.claude/projects/{YYYY-MM-DD}-{slug}/` contains `brief.md`, `research/NN-*.md`, `plan.md`, `sessions/`, `progress.json`, and `review.md`.
@@ -68,9 +85,6 @@ Under the hood, `lib/util/autonomy-gate.mjs` runs a small state machine (`idle
 ## Quick start
 
 ```bash
-# Install the marketplace, then browse and enable plugins with /plugin
-claude plugin marketplace add https://git.fromaitochitta.com/open/ktg-plugin-marketplace.git
-
 # Capture intent (interactive)
 /trekbrief Add user authentication with JWT tokens
 # → .claude/projects/2026-04-18-jwt-auth/brief.md
@@ -127,7 +141,10 @@ Concrete capabilities, observable in the code — not aspirations.
 
 **Virksomhet / regulated environment.** Defense-in-depth security across four layers (plugin hooks, prompt-level denylist, pre-execution plan scan, scoped tool access). `disableSkillShellExecution: true` recommendation for fork-ers handling untrusted briefs. No cloud dependency, no GitHub requirement. Validators are plain-Node CLIs — invocable from CI, custom hooks, or external tools, not just from voyage commands.
 
-**What it doesn't solve:**
+## Non-goals
+
+What this pipeline does **not** solve — read this before adopting it:
+
 - LLM output truthfulness. Validators check shape, not facts. A plan with hallucinated paths passes schema but fails in execute. Plan-critic catches some, not all.
 - Multi-user concurrency on a single project directory. Two simultaneous executors will clobber `progress.json`.
 - Cost management. Opus on the orchestrator layer is expensive; documented in [Cost profile](#cost-profile), no automatic model downgrade.
@@ -757,26 +774,6 @@ The `pre-compact-flush.mjs` hook directly fixes the documented P0 in `docs/treke
 
 **Annotation HTML requires a desktop browser.** `scripts/annotate.mjs` produces a single self-contained `.html` file you open with `file://` in any modern browser (Chrome / Safari / Firefox / Edge — last two versions). No CDN, no server, no npm runtime deps. State persists in `localStorage` so closing and re-opening the tab keeps your work, but it's local to one browser on one machine — not synced anywhere. If you want to annotate without a browser, paste the `.md` into Claude with "comments inline below" and write notes in chat — same end result, just without the visual surface.
 
-## Installation
-
-Add the marketplace and browse plugins with `/plugin`:
-
-```bash
-claude plugin marketplace add https://git.fromaitochitta.com/open/ktg-plugin-marketplace.git
-```
-
-Or enable directly in `~/.claude/settings.json`:
-
-```json
-{
-  "enabledPlugins": {
-    "voyage@ktg-plugin-marketplace": true
-  }
-}
-```
-
-An optional architect step between research and plan was previously available via a separate plugin; that architect plugin is no longer publicly distributed. The `architecture/overview.md` filesystem slot remains supported by `/trekplan` for any compatible producer.
-
 ## Profile system (v4.1.0)
 
 Four built-in model profiles plus operator-defined `<custom>.yaml` (drop in `lib/profiles/`). Each profile pins `phase_models` for the six pipeline phases. The active profile is recorded in plan.md frontmatter as `profile: <name>` and emitted to JSONL stats for cost-attribution.
@@ -921,6 +918,18 @@ suppress this, leave the `architecture/` directory absent from your
 project directory. Discovery is additive — missing file is fine, no
 error.
 
+## Changelog
+
+Full version history → [CHANGELOG.md](CHANGELOG.md).
+
+Recent, in one line each:
+
+- **v5.8.0** — offline gold-scored output eval (SKAL-1·4b): `lib/review/gold-scorer.mjs` grades a committed agent-run fixture against the golden corpus at `(file, rule_key)` granularity; suite census gains a `goldEval` category. Offline + deterministic, no live agent spawn.
+- **v5.7.1** — leaner always-loaded agent listing (`<example>` blocks moved into agent bodies, ~3,180 tok/turn, no behavior change).
+- **v5.7.0** — opt-in per-session token/cost metering (SKAL-2) + eval foundation (SKAL-1·4a).
+- **v5.6.1** — one-line `description:` for the four reference/dormant agents (~700 tok).
+- **v5.5.0** — brief **framing** enforcement (`brief_version 2.2`) + a `/trekreview` reviewer-schema contract. Additive, no breaking changes.
+
 ## Contributing
 
 See [CONTRIBUTING.md](CONTRIBUTING.md).