Move prompt markdown files into prompts/ subdirectory

Update all internal URLs to reflect new paths.

prompts/EXISTING_REPO_CHECKLIST.md

@@ -1,7 +1,7 @@
 # Existing Repo Checklist
 
 Use this checklist when beginning work in a repo that may not yet conform to our
-[development policies](https://git.eeqj.de/sneak/prompts/raw/branch/main/REPO_POLICIES.md).
+[development policies](https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/REPO_POLICIES.md).
 
 Work on a feature branch. Check each item and fix any gaps before proceeding
 with your task.
@@ -19,7 +19,7 @@ with your task.
       Started, Rationale, Design, TODO, License, Author)
 - [ ] `LICENSE` file exists and matches the README
 - [ ] `REPO_POLICIES.md` exists and version date is current with the
-      [authoritative source](https://git.eeqj.de/sneak/prompts/raw/branch/main/REPO_POLICIES.md)
+      [authoritative source](https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/REPO_POLICIES.md)
 - [ ] `.gitignore` is comprehensive (OS, editor, language artifacts, secrets) —
       fetch from `https://git.eeqj.de/sneak/prompts/raw/branch/main/.gitignore`
       if missing

prompts/NEW_REPO_CHECKLIST.md

@@ -2,10 +2,10 @@
 
 Use this checklist when creating a new repository from scratch. Follow the steps
 in order. Full policies are at:
-`https://git.eeqj.de/sneak/prompts/raw/branch/main/REPO_POLICIES.md`
+`https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/REPO_POLICIES.md`
 
 Template files can be fetched from:
-`https://git.eeqj.de/sneak/prompts/raw/branch/main/<filename>`
+`https://git.eeqj.de/sneak/prompts/raw/branch/main/<path>`
 
 ## 1. Initialize
 
@@ -40,7 +40,8 @@ Template files can be fetched from:
 ### Create Project Files
 
 - [ ] `LICENSE` file matching the chosen license
-- [ ] `REPO_POLICIES.md` — fetch from prompts repo
+- [ ] `REPO_POLICIES.md` — fetch from `prompts/REPO_POLICIES.md` in the prompts
+      repo
 - [ ] `Dockerfile` and `.dockerignore`
     - Server: runs the application
     - Non-server: brings up dev environment and runs `make check`

prompts/REPO_POLICIES.md

@@ -123,7 +123,7 @@ Version: 2026-02-22
 
 - When setting up a new repo, files from the `prompts` repo may be used as
   templates. Fetch them from
-  `https://git.eeqj.de/sneak/prompts/raw/branch/main/<filename>`.
+  `https://git.eeqj.de/sneak/prompts/raw/branch/main/<path>`.
 
 - New repos must contain at minimum:
     - `README.md`, `.git`, `.gitignore`, `.editorconfig`