diff --git a/development/tooling.md b/development/tooling.md
index 91bb8b7..ffc2ab8 100644
--- a/development/tooling.md
+++ b/development/tooling.md
@@ -196,6 +196,28 @@ joining the oxfmt-superseded rules already off.
   are part of the public API.
 - The narrower scope keeps the signal high without config-file boilerplate.
 
+### `knip` lists `src/index.ts` as an entry
+
+#### Decision (2026-09)
+
+`knip.json` declares `"entry": ["src/index.ts", "scripts/*.ts"]`.
+
+#### Why
+
+- Supplying `entry` **replaces** knip's default entry detection, which otherwise
+  derives the public entry from `package.json` `exports`. Adding `scripts/*.ts`
+  there therefore dropped the library entry, so knip resolved the package through
+  its `dist/index.js` output and reported the unreferenced source entry file
+  `src/index.ts` as an unused file.
+- Naming the source entry restores the link between the public API and the
+  source graph without pointing knip at build output.
+
+#### Rejected
+
+- `paths` mapping `dist/index.*` back to `src/index.ts`: more config to model a
+  relation the explicit entry states directly, and it would break whenever the
+  build layout changes.
+
 ### `maintain:outdated` ignores `@types/node`
 
 #### Decision (2026-09)
diff --git a/knip.json b/knip.json
index 19b899b..2b1590a 100644
--- a/knip.json
+++ b/knip.json
@@ -1,5 +1,5 @@
 {
     "$schema": "./node_modules/knip/schema.json",
-    "entry": ["scripts/*.ts"],
+    "entry": ["src/index.ts", "scripts/*.ts"],
     "ignoreDependencies": ["@runwisp/pubv"]
 }