docs: align README with existing license/docs and expand commit message guide

CONTRIBUTING.md

@@ -47,6 +47,28 @@ Before opening a PR:
 
 ## Commit Message Examples
 
-- `fix(scanner): prevent duplicate processing on repeated detections`
-- `perf(collections): coalesce overlapping reload requests`
-- `docs(readme): add release workflow section`
+Preferred format:
+
+```text
+type(scope): short summary
+```
+
+Common types used in this repository:
+
+- `feat`: new feature
+- `fix`: bug fix
+- `perf`: performance improvement
+- `docs`: documentation-only change
+- `refactor`: code cleanup without behavior change
+- `test`: tests added/updated
+- `chore`: maintenance/tooling/config updates
+
+Examples:
+
+- `feat(scanner): add adaptive cooldown for repeated OCR misses`
+- `fix(garage): prevent duplicate copy into target collection`
+- `perf(collections): coalesce overlapping refresh requests`
+- `docs(readme): add VS Code release build task usage`
+- `refactor(auth): simplify session guard flow in AuthGate`
+- `test(utils): cover scanner id extraction edge cases`
+- `chore(vscode): add release build tasks for apk and appbundle`

README.md

@@ -173,7 +173,7 @@ Use **Terminal → Run Task**:
 
 ## Contributing
 
-See `CONTRIBUTING.md` for branching, commit style, and PR guidelines.
+See `CONTRIBUTING.md` for branching strategy, commit message rules, and PR guidelines.
 
 ## Security Notes
 
@@ -185,9 +185,12 @@ For reporting vulnerabilities, see `SECURITY.md`.
 
 ## License
 
-License file is not included in this repository yet.
-Add your preferred license in the GitHub repo when ready.
+This project is licensed under the MIT License.
+See `LICENSE` for details.
 
 ## Reference
 
+- Contributor guidelines: `CONTRIBUTING.md`
+- Security policy: `SECURITY.md`
 - Product/backend notes: `TPB.md`
+