pstack: restore /sharpen to the original prompt, return only the rewrite (#729)

* pstack: restore /sharpen to the original prompt, plus one line to leave choices open

Co-authored-by: lauren <poteto@users.noreply.github.com>

* pstack: say /sharpen returns a rewritten prompt and doesn't do the task

Co-authored-by: lauren <poteto@users.noreply.github.com>

* chore(pstack): bump to 0.15.29

Co-authored-by: lauren <poteto@users.noreply.github.com>

* pstack: put /sharpen's four asks in a numbered list

Drops the semicolons and the (1) to (4) markers that broke technical-writing
and unslop rule 13. Adds "do four things" so a complete sentence introduces
the list. Every other word is unchanged.

Co-authored-by: lauren <poteto@users.noreply.github.com>

---------

Co-authored-by: Cursor Agent <cursoragent@cursor.com>

Author: poteto

harness/pstack/claude-code/.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
 	"name": "pstack",
 	"displayName": "pstack",
-	"version": "0.15.28",
+	"version": "0.15.29",
 	"description": "if you want to go fast, go deep first. pstack helps you write less, but higher quality code. rigorous agent workflows you can parallelize with confidence.",
 	"author": {
 		"name": "Lauren Tan"

harness/pstack/claude-code/README.md

@@ -125,7 +125,7 @@ to keep [`/poteto-mode`](./skills/poteto-mode/SKILL.md) on across turns, pick it
 | [`/poteto-mode`](./skills/poteto-mode/SKILL.md) | default entry point for any non-trivial task. |
 | [`/poteto-help`](./skills/poteto-help/SKILL.md) | you're new to pstack, or unsure which skill, playbook, or principle fits. finds out what you're trying to do, answers that part, and hands you a prompt to type. runs only when you type `/poteto-help`. |
 | [`/in-your-own-words`](./skills/in-your-own-words/SKILL.md) | you want the agent to play back your goal and the problem before it starts. runs only when you type `/in-your-own-words`. |
-| [`/sharpen`](./skills/sharpen/SKILL.md) | you want a task approached the way a top expert would, aimed at what you're really after, without overspecifying it or deciding your choices for you. |
+| [`/sharpen`](./skills/sharpen/SKILL.md) | you want a prompt made deeper, not bigger, before you send it: what a top professional would do that you didn't ask for, the raw material they'd start from, their methods and tools, and an outside check that the result is right. hands back the rewritten prompt and leaves your choices open. doesn't do the task. runs only when you type `/sharpen`. |
 | [`/how`](./skills/how/SKILL.md) | you want a walkthrough of how a subsystem works. |
 | [`/why`](./skills/why/SKILL.md) | you want to know why something was built this way. discovers available MCPs at run time and queries each evidence category in parallel (source control, issue tracker, long-form docs, real-time chat, infra observability, error tracking, analytics warehouse). |
 | [`/recall`](./skills/recall/SKILL.md) | you're starting or resuming work and want your recent context on a topic rebuilt from your own chat history and the shared record, handed back as a tight current-state brief. |