diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..cb9a50e
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,13 @@
+# Normalize line endings on commit; check out platform-native by default
+* text=auto
+
+# Scripts that must keep LF regardless of platform
+gradlew   text eol=lf
+*.sh      text eol=lf
+*.py      text eol=lf
+
+# Windows batch files need CRLF
+*.bat     text eol=crlf
+
+# Binaries
+*.jar     binary
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d611a26..311f22f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,25 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 Nothing yet.
 
+## [1.1.0] - 2026-09-21
+
+Dependency and toolchain refresh, plus line-ending normalization. No runtime
+behavior, challenge content, or public DSL has changed.
+
+### Added
+- `.gitattributes` normalizing line endings on commit: `text=auto` by default, LF enforced for `gradlew`, `*.sh`, and `*.py`, CRLF for `*.bat`, and `*.jar` marked binary.
+
+### Changed
+- Upgraded the Gradle wrapper from 9.6.1 to 9.7.1.
+- Bumped dependencies: Ktor → 3.6.0, Kotest → 6.2.5, `readingbat-core` → 3.4.0.
+- Bumped build plugins: kotlinter → 5.7.0, detekt → 2.0.0-alpha.6, versions plugin → 0.64.0.
+- `gradlew.bat` was renormalized to CRLF and the Gradle wrapper jar refreshed as part of the wrapper upgrade.
+
+### Documentation
+- Reconstructed a `[1.0.0]` section in this changelog from Git history, replacing the former catch-all "Pre-1.0.1 history" heading, and added Keep a Changelog compare links for every release.
+- Documented the `.gitattributes` line-ending policy in `README.md`, `CLAUDE.md`, and `llms.txt`.
+- Added the CI workflow to the `llms.txt` development section.
+
 ## [1.0.1] - 2026-08-01
 
 Tooling, CI, and toolchain upgrades. No runtime behavior, challenge content,
@@ -75,6 +94,7 @@ are less complete than later ones. Structured changelog tracking begins with
 - `andor7` function name mismatch, and the unregistered `front_back` challenge.
 - Several incorrect challenge return types.
 
-[Unreleased]: https://github.com/readingbat/readingbat-python-content/compare/1.0.1...master
+[Unreleased]: https://github.com/readingbat/readingbat-python-content/compare/1.1.0...master
+[1.1.0]: https://github.com/readingbat/readingbat-python-content/compare/1.0.1...1.1.0
 [1.0.1]: https://github.com/readingbat/readingbat-python-content/compare/1.0.0...1.0.1
 [1.0.0]: https://github.com/readingbat/readingbat-python-content/commits/1.0.0
diff --git a/CLAUDE.md b/CLAUDE.md
index d2d7532..155c828 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -26,6 +26,10 @@ The `main()` prints define the test cases — each `print()` call produces an ex
 
 Run `make help` for a self-documenting list of the build, test, lint, run, and packaging targets.
 
+## Line Endings
+
+`.gitattributes` normalizes line endings on commit: LF for `*.py`, `*.sh`, and `gradlew`; CRLF for `*.bat`. Write new challenge files with LF and let Git handle the rest — do not hand-convert.
+
 ## Adding a New Challenge
 
 1. Create `python/<group_dir>/challenge_name.py` following the file pattern above
diff --git a/README.md b/README.md
index 24eadb6..40d47e3 100644
--- a/README.md
+++ b/README.md
@@ -43,3 +43,9 @@ if __name__ == '__main__':
 2. Register the challenge in `src/main/kotlin/Content.kt` — either add a `challenge()` call or ensure the filename matches an existing `includeFilesWithType` glob. Return types are qualified, e.g., `ReturnType.IntType`.
 
 3. Run `make lint` then `make tests` to verify.
+
+## Line Endings
+
+`.gitattributes` normalizes line endings on commit: LF for `*.py`, `*.sh`, and
+`gradlew`; CRLF for `*.bat`; `*.jar` is treated as binary. If files show as
+modified right after a fresh clone or pull, run `git add --renormalize .` once.
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index bfb4233..ee67873 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,5 +1,48 @@
 # Release Notes
 
+## 1.1.0 — dependency refresh and line-ending normalization
+
+A maintenance release: current versions of the build toolchain and runtime
+dependencies, plus a `.gitattributes` file that normalizes line endings across
+platforms. No runtime behavior, challenge content, or public DSL has changed.
+
+### Highlights
+
+- **Gradle wrapper → 9.7.1.** Up from 9.6.1.
+- **Dependency upgrades.** Ktor → 3.6.0, Kotest → 6.2.5, `readingbat-core` →
+  3.4.0. Kotlin (2.4.10), `common-utils` (3.2.2), and `kotlin-logging` (8.0.4)
+  are unchanged from 1.0.1.
+- **Build plugin upgrades.** kotlinter → 5.7.0, detekt → 2.0.0-alpha.6,
+  versions plugin → 0.64.0.
+- **`.gitattributes`.** Line endings are now normalized on commit: `text=auto`
+  by default, LF enforced for `gradlew`, `*.sh`, and `*.py`, CRLF for `*.bat`,
+  and `*.jar` treated as binary. This keeps the Python challenge files and the
+  Gradle wrapper scripts stable regardless of the contributor's platform.
+
+### Documentation
+
+- The changelog now carries a reconstructed `[1.0.0]` section (built from Git
+  history after the tag was created retroactively), replacing the former
+  catch-all "Pre-1.0.1 history" heading, plus compare links for every release.
+- `README.md`, `CLAUDE.md`, and `llms.txt` document the new line-ending policy.
+- `llms.txt` now mentions the GitHub Actions CI workflow alongside the other
+  development commands.
+
+### Upgrade notes
+
+- Contributors on Windows may see `gradlew.bat` show as modified the first time
+  they pull, as Git renormalizes it to CRLF under the new `.gitattributes`.
+  Running `git add --renormalize .` once resolves it.
+- Run `./gradlew --refresh-dependencies` (or `make build`) once after pulling so
+  the new plugin and dependency versions resolve.
+- The Java 25 toolchain requirement from 1.0.1 is unchanged.
+
+### Full diff
+
+See the [compare view on
+GitHub](https://github.com/readingbat/readingbat-python-content/compare/1.0.1...1.1.0)
+for the complete set of changes in this release.
+
 ## 1.0.1 — tooling, CI, and dependency upgrades
 
 This release focuses on developer ergonomics, continuous integration, and
diff --git a/gradle.properties b/gradle.properties
index 5a1c7c1..ef1db44 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
 group=com.readingbat
-version=1.0.1
+version=1.1.0
 
 kotlin.code.style=official
 org.gradle.caching=true
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 2552c8e..faccb44 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,15 +1,15 @@
 [versions]
-detekt = "2.0.0-alpha.5"
-gradle-wrapper = "9.6.1"
+detekt = "2.0.0-alpha.6"
+gradle-wrapper = "9.7.1"
 jvm = "25"
-kotest = "6.2.3"
+kotest = "6.2.5"
 kotlin = "2.4.10"
-kotlinter = "5.6.0"
-ktor = "3.5.1"
+kotlinter = "5.7.0"
+ktor = "3.6.0"
 logging = "8.0.4"
-readingbat = "3.3.1"
+readingbat = "3.4.0"
 utils = "3.2.2"
-versions = "0.57.0"
+versions = "0.64.0"
 
 [libraries]
 core-utils = { module = "com.pambrose.common-utils:core-utils", version.ref = "utils" }
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index b1b8ef5..eddabd2 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index a9db115..ad7845b 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.7.1-bin.zip
 networkTimeout=10000
 retries=0
 retryBackOffMs=500
diff --git a/llms.txt b/llms.txt
index 933b8f5..bf8f454 100644
--- a/llms.txt
+++ b/llms.txt
@@ -41,6 +41,8 @@ Each .py file has: a `# @desc` comment, a function implementing the challenge, a
 - JVM toolchain: Java 25
 - Testing: Kotest with JUnit5
 - Lint/format: kotlinter + detekt, configured via `.editorconfig` and `build.gradle.kts`
+- Line endings: normalized by `.gitattributes` (LF for `*.py`, `*.sh`, `gradlew`; CRLF for `*.bat`)
+- CI: `.github/workflows/ci.yml` runs `make lint` and `make tests` on every push and PR to `master`
 
 ## Adding Challenges