Add prose-wrap policy: hard-wrap markdown at 80 columns

Configure prettier with proseWrap: always. Reformat all markdown
files to conform.

docs/EXISTING_REPO_CHECKLIST.md

@@ -1,29 +1,26 @@
 # Existing Repo Checklist
 
-Use this checklist when beginning work in a repo that may not yet
-conform to our
+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).
 
-Work on a feature branch. Check each item and fix any gaps before
-proceeding with your task.
+Work on a feature branch. Check each item and fix any gaps before proceeding
+with your task.
 
 ## Required Files
 
-- [ ] `README.md` exists with all required sections (Description,
-      Getting Started, Rationale, Design, TODO, License, Author)
+- [ ] `README.md` exists with all required sections (Description, Getting
+      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)
-- [ ] `.gitignore` is comprehensive (OS, editor, language artifacts,
-      secrets) — fetch from
-      `https://git.eeqj.de/sneak/prompts/raw/branch/main/.gitignore`
+- [ ] `.gitignore` is comprehensive (OS, editor, language artifacts, secrets) —
+      fetch from `https://git.eeqj.de/sneak/prompts/raw/branch/main/.gitignore`
       if missing
 - [ ] `.editorconfig` exists
 - [ ] `Dockerfile` and `.dockerignore` exist
 - [ ] Language-specific config:
     - [ ] Go: `go.mod`, `go.sum`, `.golangci.yml`
-    - [ ] JS: `package.json`, `yarn.lock`, `.prettierrc`,
-          `.prettierignore`
+    - [ ] JS: `package.json`, `yarn.lock`, `.prettierrc`, `.prettierignore`
     - [ ] Python: `pyproject.toml`
     - [ ] Docs/writing: `.prettierrc`, `.prettierignore`
 
@@ -31,36 +28,32 @@ proceeding with your task.
 
 - [ ] `Makefile` exists in root — reference the
       [model Makefile](https://git.eeqj.de/sneak/prompts/raw/branch/main/Makefile)
-- [ ] Has targets: `test`, `lint`, `fmt`, `fmt-check`, `check`,
-      `docker`, `hooks`
+- [ ] Has targets: `test`, `lint`, `fmt`, `fmt-check`, `check`, `docker`,
+      `hooks`
 - [ ] `make check` does not modify any files in the repo
 - [ ] `make test` has a 30-second timeout
 - [ ] `make check` passes on current branch
 
 ## Formatting
 
-- [ ] Platform-standard formatter is configured (`black`, `prettier`,
-      `go fmt`)
-- [ ] Default formatter config, only exception: four-space indents
-      (except Go)
+- [ ] Platform-standard formatter is configured (`black`, `prettier`, `go fmt`)
+- [ ] Default formatter config, only exception: four-space indents (except Go)
 - [ ] All files pass `make fmt-check`
 
 ## Git Hygiene
 
 - [ ] Pre-commit hook is installed (`make hooks`)
 - [ ] No secrets in the repo (`.env`, keys, credentials)
-- [ ] No mutable references in Dockerfiles or scripts (tags,
-      `@latest`) — all pinned by cryptographic hash with version/date
-      comment
+- [ ] No mutable references in Dockerfiles or scripts (tags, `@latest`) — all
+      pinned by cryptographic hash with version/date comment
 - [ ] Using `yarn`, not `npm` (JS projects)
 
 ## Directory Structure
 
 - [ ] No unnecessary files in repo root
-- [ ] Files organized into canonical subdirectories (`bin/`, `cmd/`,
-      `docs/`, `internal/`, `static/`, etc.)
-- [ ] Go migrations in `internal/db/migrations/` and embedded in
-      binary
+- [ ] Files organized into canonical subdirectories (`bin/`, `cmd/`, `docs/`,
+      `internal/`, `static/`, etc.)
+- [ ] Go migrations in `internal/db/migrations/` and embedded in binary
 
 ## Final
 

docs/NEW_REPO_CHECKLIST.md

@@ -1,7 +1,7 @@
 # New Repo Checklist
 
-Use this checklist when creating a new repository from scratch. Follow
-the steps in order. Full policies are at:
+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`
 
 Template files can be fetched from:
@@ -30,11 +30,11 @@ Template files can be fetched from:
 
 ### Fetch Template Files
 
-- [ ] `.gitignore` — fetch from prompts repo, extend for
-      language-specific artifacts
+- [ ] `.gitignore` — fetch from prompts repo, extend for language-specific
+      artifacts
 - [ ] `.editorconfig` — fetch from prompts repo
-- [ ] `Makefile` — fetch from prompts repo, adapt targets for the
-      project's language and tools
+- [ ] `Makefile` — fetch from prompts repo, adapt targets for the project's
+      language and tools
 - [ ] For JS/docs repos: `.prettierrc`, `.prettierignore`
 
 ### Create Project Files
@@ -46,8 +46,8 @@ Template files can be fetched from:
     - Non-server: brings up dev environment and runs `make check`
     - Image pinned by sha256 hash with version/date comment
 - [ ] Language-specific:
-    - [ ] Go: `go mod init sneak.berlin/go/<name>`, `.golangci.yml`
-          (copy from `~/dev/upaas/.golangci.yml`)
+    - [ ] Go: `go mod init sneak.berlin/go/<name>`, `.golangci.yml` (copy from
+          `~/dev/upaas/.golangci.yml`)
     - [ ] JS: `yarn init`, `yarn add --dev prettier`
     - [ ] Python: `pyproject.toml`
 
@@ -57,8 +57,7 @@ Template files can be fetched from:
 - [ ] `make lint` — runs linter
 - [ ] `make fmt` — formats code (writes)
 - [ ] `make fmt-check` — checks formatting (read-only)
-- [ ] `make check` — prereqs: `test`, `lint`, `fmt-check`; must not
-      modify files
+- [ ] `make check` — prereqs: `test`, `lint`, `fmt-check`; must not modify files
 - [ ] `make docker` — builds Docker image
 - [ ] `make hooks` — installs pre-commit hook