diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index eca9d2e..8562750 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -46,10 +46,34 @@ jobs:
         env:
           TAG: ${{ steps.tag.outputs.value }}
 
+      - name: Skip if version already on crates.io
+        id: crates_io
+        env:
+          TAG: ${{ steps.tag.outputs.value }}
+        run: |
+          tag="${TAG#v}"
+          status=$(curl -s -o /dev/null -w "%{http_code}" \
+            -H "User-Agent: commitor-cli-publish" \
+            "https://crates.io/api/v1/crates/commitor-cli/$tag")
+          echo "status=$status" >> "$GITHUB_OUTPUT"
+
       - name: Publish commitor-cli
+        if: steps.crates_io.outputs.status != '200'
         env:
           CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
-        run: cargo publish -p commitor-cli
+        run: |
+          set +e
+          out=$(cargo publish -p commitor-cli 2>&1)
+          rc=$?
+          echo "$out"
+          # Tolerate a version that slipped through (e.g. a prior partial
+          # run already published it) so the workflow doesn't fail on a
+          # re-run of the same release.
+          if echo "$out" | grep -qi "already uploaded"; then
+            echo "Version already published — treating as success."
+            exit 0
+          fi
+          exit $rc
 
   npm:
     name: Publish to npm
@@ -83,9 +107,32 @@ jobs:
         env:
           TAG: ${{ steps.tag.outputs.value }}
 
+      - name: Skip if version already on npm
+        id: npm_check
+        env:
+          TAG: ${{ steps.tag.outputs.value }}
+        run: |
+          tag="${TAG#v}"
+          if npm view "commitor-cli@$tag" version >/dev/null 2>&1; then
+            echo "published=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "published=false" >> "$GITHUB_OUTPUT"
+          fi
+
       - name: Configure npm auth
+        if: steps.npm_check.outputs.published != 'true'
         run: echo "//registry.npmjs.org/:_authToken=${{ secrets.NPM_TOKEN }}" > npm/.npmrc
 
       - name: Publish commitor-cli
-        run: npm publish --access public
+        if: steps.npm_check.outputs.published != 'true'
+        run: |
+          set +e
+          out=$(npm publish --access public 2>&1)
+          rc=$?
+          echo "$out"
+          if echo "$out" | grep -qi "previously published\|cannot publish over"; then
+            echo "Version already published — treating as success."
+            exit 0
+          fi
+          exit $rc
         working-directory: npm
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7d2f57d..3736a48 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,37 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project is in 0.x, minor versions may add, change, or remove
 functionality freely; 1.0.0 marks a stable command surface.
 
+## [0.5.0] — 2026-08-29
+
+### Added
+- `commitor revert` — undo commits produced by `commitor commit`. Unpushed
+  commits are rolled back with a hard reset; already-pushed commits are
+  reverted with `git revert`, respecting the safety of shared history.
+- `commitor scan --diff-range <RANGE>` — analyze a fixed git range
+  (e.g. `origin/main...HEAD`) instead of the working tree, plus `--markdown`
+  output suited to a PR comment.
+- `commitor scan --context "<title/description>"` — forward a PR's stated
+  intent to the model so it can weigh it against the files actually touched.
+- Post-commit push in `commitor commit` — after committing, offers to push
+  the new branch, auto-detecting the upstream.
+- Per-repo session history of `commitor commit` runs, stored at
+  `~/.commitor/history/<repo-id>.jsonl`.
+- GitHub Action (`./action`) that runs `commitor scan --diff-range` on pull
+  requests and posts an updatable Markdown comment.
+
+### Changed
+- `commitor commit` gains interactive branch selection, base-branch tracking,
+  and an offline mode.
+
+### Improved
+- PR-scale analysis: `--diff-range` scans now always consult the backend
+  (the local heuristic is advisory only at PR scale), so unrelated changes
+  bundled in a large diff are no longer missed.
+
+### Fixed
+- Release workflow (`publish.yml`) is now idempotent — re-running a release
+  no longer fails on an already-published crates.io / npm version.
+
 ## [0.4.0] — 2026-08-29
 
 ### Added
@@ -157,5 +188,11 @@ not of the full tool.
 - `commitor scan` and `commitor commit` — in active development,
   coming in future 0.x releases.
 
+[0.5.0]: https://github.com/Commitor-AI/commitor/releases/tag/v0.5.0
+[0.4.0]: https://github.com/Commitor-AI/commitor/releases/tag/v0.4.0
+[0.3.3]: https://github.com/Commitor-AI/commitor/releases/tag/v0.3.3
+[0.3.2]: https://github.com/Commitor-AI/commitor/releases/tag/v0.3.2
+[0.3.1]: https://github.com/Commitor-AI/commitor/releases/tag/v0.3.1
+[0.3.0]: https://github.com/Commitor-AI/commitor/releases/tag/v0.3.0
 [0.2.0]: https://github.com/Commitor-AI/commitor/releases/tag/v0.2.0
 [0.1.0]: https://github.com/Commitor-AI/commitor/releases/tag/v0.1.0
diff --git a/crates/cli/Cargo.toml b/crates/cli/Cargo.toml
index dd63773..04a28de 100644
--- a/crates/cli/Cargo.toml
+++ b/crates/cli/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "commitor-cli"
-version = "0.4.0"
+version = "0.5.0"
 edition = "2021"
 description = "Catches unrelated changes bundled into commits and splits them cleanly — whole-file or hunk-level, guided by AI analysis"
 license = "MIT OR Apache-2.0"
diff --git a/npm/package.json b/npm/package.json
index 13efcc0..a20bf21 100644
--- a/npm/package.json
+++ b/npm/package.json
@@ -1,6 +1,6 @@
 {
   "name": "commitor-cli",
-  "version": "0.4.0",
+  "version": "0.5.0",
   "description": "Catches unrelated changes bundled into commits and splits them cleanly — whole-file or hunk-level, guided by AI analysis",
   "bin": {
     "commitor": "bin/commitor.js"