diff --git a/.markdownlint.json b/.markdownlint.json
new file mode 100644
index 0000000..b077f0e
--- /dev/null
+++ b/.markdownlint.json
@@ -0,0 +1,4 @@
+{
+  "default": true,
+  "MD013": false
+}
diff --git a/CLAUDE.md b/CLAUDE.md
index da38b68..c1a0101 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -78,7 +78,7 @@ Required structure, in order:
 5. **Details & examples** — per function or group: the signature, parameters only where non-obvious, the return, **what it errors on** (the honest-boundary principle), and at least one **runnable example ending in `# Output:`**.
 6. **Notes / boundaries** — engine, determinism, limits, differences from the mirrored API.
 
-Style: names always in backticks; lead with the table before prose; examples real, minimal, runnable; drop framework boilerplate (no empty `#### Parameters` table for a one-arg function — fold into a sentence); state errors and edge behavior explicitly; flag any non-snake_case name (e.g. http's `postForm`).
+Style: names always in backticks; lead with the table before prose; examples real, minimal, runnable; drop framework boilerplate (no empty `#### Parameters` table for a one-arg function — fold into a sentence); state errors and edge behavior explicitly; flag any non-snake_case name (e.g. http's `postForm`). Prose is **not** hard-wrapped — the line-length lint (markdownlint `MD013`) is disabled in `.markdownlint.json`; wrap nothing for column width, since wrapping breaks tables and long signatures and hurts readability.
 
 **Doc coverage check** — `tools/doccov/coverage.star` + `TestDocCoverage` enforce that every member of every `lib/*` module appears in its README (matched as a backtick-quoted identifier). The Go test enumerates the authoritative surface (each module's registered members across the Module/Struct/flat shapes) and runs the `.star` matcher through a Machine, so the check **dogfoods the `regex` module**. Run it with `go test -run TestDocCoverage -v .` — the report lists any undocumented members. (Scope: `lib/*` modules; the go.starlark.net-backed `math`/`struct`/`time` have no lib README and are skipped. Type methods are a standard requirement verified by review, not by the automated member check.)