chore(voyage): release v5.0.1 — drop standalone HTML render; print literal /playground document-critique invocation

The v5.0.0 stop-gap had /trekbrief, /trekplan, and /trekreview each render
a read-only {artifact}.html (via scripts/render-artifact.mjs) AND print a
vague "run the /playground plugin" instruction. In practice the read-only
HTML was redundant with what /playground produces and the instruction
wasn't copy-paste-ready — the operator had to guess the right invocation.

v5.0.1 deletes scripts/render-artifact.mjs + its test + npm run render,
and makes each producing command end with a single boxed, literal,
copy-paste-ready line:

    /playground build a document-critique playground for {artifact_path}

One paste from the operator launches the official playground skill's
document-critique template, which builds an interactive HTML — artifact
on the left, per-line Approve/Reject/Comment cards on the right, Copy
Prompt button at the bottom. Mark suggestions, click Copy Prompt, paste
back, Claude revises the .md. Doc-consistency test pins the literal
invocation so the prose cannot soften back into vagueness.

npm test green: 503 tests, 501 pass, 0 fail, 2 skipped.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

plugins/voyage/CHANGELOG.md

@@ -4,6 +4,52 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## v5.0.1 — 2026-05-13 — Drop the standalone HTML render; print a literal /playground invocation
+
+**No new breaking changes beyond v5.0.0.** Forks that consumed
+`scripts/render-artifact.mjs` directly (or invoked `npm run render`) must
+remove that integration. Nothing else moves.
+
+### Why
+
+v5.0.0 had `/trekbrief`, `/trekplan`, and `/trekreview` each finish by
+*both* rendering a read-only `{artifact}.html` view (via the new
+`scripts/render-artifact.mjs`) *and* printing a vague instruction to "run
+the `/playground` plugin (`document-critique` template) on the `.md` and
+paste the prompt back". In practice the operator saw two HTMLs in their
+project dir, no annotation UI on the rendered `.html`, and had to guess
+the right `/playground` invocation. The read-only `.html` added confusion
+without affording annotation — it duplicated work the `/playground`
+HTML already does (formatted document on the left, annotations on the
+right, Copy Prompt button at the bottom).
+
+v5.0.1 deletes the redundant render and makes the printed `/playground`
+invocation literal and copy-paste-ready. One paste from the operator
+launches the `playground` skill, which loads its `document-critique`
+template, reads the `.md`, builds the interactive HTML, opens it. Mark
+suggestions, click Copy Prompt, paste back. Done.
+
+### Removed
+
+- **`scripts/render-artifact.mjs`** — the v5.0.0 standalone Markdown→HTML renderer (~280 lines, zero deps). Redundant with `/playground`'s HTML.
+- **`tests/scripts/render-artifact.test.mjs`** (and the now-empty `tests/scripts/` dir).
+- **`npm run render`** script alias in `package.json`.
+- All references to `render-artifact.mjs`, `brief.html`, `plan.html`, `review.html` in `CLAUDE.md` (plugin + root), `README.md` (plugin + root), `.claude-plugin/marketplace.json`, and the three command files' final-output blocks.
+
+### Changed
+
+- **`commands/trekbrief.md` Step 4g (Finalize), `commands/trekplan.md` Phase 10 (Present and refine), `commands/trekreview.md` Phase 9 (Present summary)** — each now ends by printing a single boxed block with the literal text `/playground build a document-critique playground for {abs_path}` and a one-paragraph explanation of the paste-mark-copy-paste loop. The literal string is pinned by `tests/lib/doc-consistency.test.mjs` so it cannot soften back into "run the `/playground` plugin" without a test failure.
+- **`tests/lib/doc-consistency.test.mjs`** — replaced the v5.0.0 `render-artifact.mjs exists` + `producing commands reference render-artifact.mjs` pins with v5.0.1 pins: `render-artifact.mjs` *no longer* exists; producing commands include the literal `/playground build a document-critique playground for` invocation; producing commands no longer reference `render-artifact.mjs`; `package.json scripts.render` is gone; CHANGELOG has both v5.0.0 and v5.0.1 entries.
+- **Plugin `CLAUDE.md`** — "Render-and-link (v5.0.0)" paragraph rewritten to "Post-command annotation invocation (v5.0.1)" explaining the literal-paste contract; project-directory contract no longer lists `.html` siblings; "State" section's project-root inventory no longer lists `.html` files.
+- **Plugin `README.md`** — "Rendered artifacts & annotation (v5.0.0)" section rewritten to "Reviewing and annotating artifacts (v5.0.1)" with a worked example of the printed output and a "What v5.0.1 changed from v5.0.0" sub-note. Top-of-README one-liner + bottom "Known limitations" note updated.
+- **Root `CLAUDE.md`** + **root `README.md`** + **`.claude-plugin/marketplace.json`** — voyage description updated to v5.0.1 + the one-paste invocation model.
+
+### Notes
+
+- `/playground` is the `playground` skill from `claude-plugins-official`. It must be installed in the operator's environment for the printed command to work. If it isn't, the same effect is achievable by pasting the `.md` content into Claude with "review this and suggest changes" — manual freehand revision.
+- `npm test`: 503 tests, 501 pass, 0 fail, 2 skipped (down from 509 — 8 `render-artifact.test.mjs` tests removed; the doc-consistency pins were updated to v5.0.1 contracts, net +2 tests).
+- Version bump 5.0.0 → 5.0.1 in `.claude-plugin/plugin.json`, `package.json`, `package-lock.json`, plugin `README.md` badge.
+
 ## v5.0.0 — 2026-05-12 — Remove the bespoke playground; render artifacts to HTML + link
 
 **Breaking.** `/trekrevise` is removed. The `playground/` directory, Handover 8