REPO_POLICIES: name examples/ in README, correct the lint example's link

As #159 (comment) says.

- `README.md`: Design names `examples/`.
- `prompts/REPO_POLICIES.md`: the sentence linking
  `examples/go-lint-system-libraries.Dockerfile` says the file holds the
  first lines of a lint phase.
- `TODO.md`: 7,265 words after that sentence.

Model: opus-5-5

README.md

@@ -172,7 +172,8 @@ share, and evolve prompts across projects.
 The repository is a collection of Markdown files organized in the `prompts/`
 subdirectory. Each file contains one or more related prompts or policy
 documents. There is no build step or runtime component; the prompts are consumed
-by copying them into other projects or referencing them directly.
+by copying them into other projects or referencing them directly. `examples/`
+holds the example `Dockerfile` files that `prompts/REPO_POLICIES.md` links to.
 
 ## Template Repos
 

TODO.md

@@ -22,7 +22,7 @@ fmt-check, and commit.
 # Completed Steps
 
 - 2026-11-09: Compacted `prompts/REPO_POLICIES.md` from 1,165 lines and 8,556
-  words to 973 lines and 7,261 words
+  words to 973 lines and 7,265 words
   (https://git.eeqj.de/sneak/prompts/issues/158). Every rule keeps its meaning.
   The rules now sit under headings, the pinning rule first. Each rule that was
   stated in several places is stated once. The Makefile copies of the Go and

prompts/REPO_POLICIES.md

@@ -444,8 +444,8 @@ Key points:
   where alpine says `vips-dev`), and delete the package lists in the same `RUN`,
   so the layer does not keep them. The test phase, on the Debian Go image,
   installs the libraries its tests need the same way. Either install goes right
-  after `FROM`, above `ARG CACHEBUST`. A lint phase that installs system
+  after `FROM`, above `ARG CACHEBUST`. The first lines of a lint phase that
-  libraries is at
+  installs system libraries are at
   `https://git.eeqj.de/sneak/prompts/raw/branch/main/examples/go-lint-system-libraries.Dockerfile`.
 
 ## Python `test` phase