diff --git a/.github/workflows/commits.yml b/.github/workflows/commits.yml
new file mode 100644
index 0000000..ea83d66
--- /dev/null
+++ b/.github/workflows/commits.yml
@@ -0,0 +1,32 @@
+name: Commits
+
+# The changelog and release notes are generated from commit subjects, so the
+# format is enforced rather than encouraged. A commit that does not parse is a
+# change that vanishes from the release notes.
+on:
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: commits-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  conventional:
+    name: Conventional commits
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          # Full history so the base..head range can be walked.
+          fetch-depth: 0
+
+      - name: Validate commit subjects
+        run: |
+          bash scripts/check-conventional-commits.sh \
+            "${{ github.event.pull_request.base.sha }}" \
+            "${{ github.event.pull_request.head.sha }}"
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..3e8d1db
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,44 @@
+name: Release
+
+# Publishing a release is a deliberate act: push a tag, and this turns the
+# conventional commits since the previous tag into grouped release notes.
+on:
+  push:
+    tags: ["v*"]
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "Existing tag to (re)build notes for"
+        required: true
+
+permissions:
+  contents: write
+
+concurrency:
+  group: release-${{ github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  publish:
+    name: Publish release
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          fetch-depth: 0
+
+      - name: Build release notes
+        id: notes
+        run: bash scripts/build-release-notes.sh "${{ inputs.tag || github.ref_name }}" > NOTES.md
+
+      - name: Create or update the GitHub Release
+        env:
+          GH_TOKEN: ${{ github.token }}
+          TAG: ${{ inputs.tag || github.ref_name }}
+        run: |
+          if gh release view "$TAG" >/dev/null 2>&1; then
+            gh release edit "$TAG" --notes-file NOTES.md
+          else
+            gh release create "$TAG" --title "$TAG" --notes-file NOTES.md
+          fi
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..2ef084e
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,41 @@
+# Changelog
+
+Notable changes to JobInsight. Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/);
+versions follow [Semantic Versioning](https://semver.org/).
+
+Entries from v0.1.0 onward are generated from Conventional Commits by
+`scripts/build-release-notes.sh`.
+
+## [Unreleased]
+
+Nothing yet.
+
+## [0.1.0] — 2026-09-15
+
+First tagged release. The extension version in `manifest.json` and the tag now
+agree, so "which build is this" has an answer.
+
+### Added
+
+- Chrome MV3 extension that analyses LinkedIn job postings in place: experience,
+  education, sponsorship, US citizenship or clearance, a short summary, and
+  highlighted keywords
+- Draggable, resizable overlay; results cached for seven days
+- Backend proxy holding the OpenAI key behind Google OAuth, so the key never
+  ships in extension source
+- `/api/health`, advertised by the root document
+
+### Infrastructure
+
+- CI on Node 20 and 22 covering the proxy's origin allowlist: requests with no
+  Origin, from another extension id, and from an ordinary web page are refused;
+  the configured extension is not; an oversized body returns 413 rather than
+  being proxied
+- `scripts/validate-manifest.mjs` checks the manifest parses, declares MV3, and
+  that every file it references exists — a manifest naming a renamed file loads
+  as a broken extension and nothing else catches it
+- `npm audit` at high severity, and a syntax check over every extension script
+- Conventional commits enforced; releases generated from them
+
+[Unreleased]: https://github.com/bibeshpyakurel/JobInsight/compare/v0.1.0...HEAD
+[0.1.0]: https://github.com/bibeshpyakurel/JobInsight/releases/tag/v0.1.0
diff --git a/scripts/build-release-notes.sh b/scripts/build-release-notes.sh
new file mode 100755
index 0000000..ce32650
--- /dev/null
+++ b/scripts/build-release-notes.sh
@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+# Turn the conventional commits between the previous tag and this one into
+# grouped Markdown release notes.
+set -euo pipefail
+
+TAG="${1:?tag required}"
+PREV=$(git describe --tags --abbrev=0 "${TAG}^" 2>/dev/null || true)
+
+if [ -n "$PREV" ]; then
+  RANGE="${PREV}..${TAG}"
+  echo "Changes since **${PREV}**."
+else
+  RANGE="$TAG"
+  echo "First tagged release. Everything below is the history leading up to **${TAG}**."
+fi
+echo ""
+
+emit() { # <heading> <type-regex>
+  local heading="$1" types="$2" body
+  body=$(git log --no-merges --format='%s|%h' "$RANGE" \
+         | grep -E "^(${types})(\([a-z0-9._/-]+\))?!?: " || true)
+  [ -z "$body" ] && return 0
+  echo "### ${heading}"
+  echo ""
+  while IFS='|' read -r subject sha; do
+    # strip the type prefix; keep any scope as a bold lead-in
+    text=$(echo "$subject" | sed -E 's/^[a-z]+(\([a-z0-9._\/-]+\))?!?: //')
+    scope=$(echo "$subject" | sed -nE 's/^[a-z]+\(([a-z0-9._\/-]+)\)!?: .*/\1/p')
+    if [ -n "$scope" ]; then
+      echo "- **${scope}**: ${text} (\`${sha}\`)"
+    else
+      echo "- ${text} (\`${sha}\`)"
+    fi
+  done <<< "$body"
+  echo ""
+}
+
+breaking=$(git log --no-merges --format='%s|%h' "$RANGE" | grep -E '^[a-z]+(\([a-z0-9._/-]+\))?!: ' || true)
+if [ -n "$breaking" ]; then
+  echo "### Breaking changes"
+  echo ""
+  while IFS='|' read -r subject sha; do
+    echo "- ${subject} (\`${sha}\`)"
+  done <<< "$breaking"
+  echo ""
+fi
+
+emit "Features"       "feat"
+emit "Fixes"          "fix"
+emit "Performance"    "perf"
+emit "Documentation"  "docs"
+emit "Build and CI"   "build|ci"
+emit "Internal"       "refactor|test|chore|style|revert"
+
+echo "---"
+echo ""
+echo "_Notes generated from Conventional Commits by \`scripts/build-release-notes.sh\`._"
diff --git a/scripts/check-conventional-commits.sh b/scripts/check-conventional-commits.sh
new file mode 100755
index 0000000..9bd6cb2
--- /dev/null
+++ b/scripts/check-conventional-commits.sh
@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+# Validate that every commit introduced by a pull request uses Conventional
+# Commits. The changelog is generated from these subjects, so a commit that
+# does not parse is a commit that silently disappears from the release notes.
+#
+# Usage: check-conventional-commits.sh <base-sha> <head-sha>
+set -euo pipefail
+
+BASE="${1:?base sha required}"
+HEAD="${2:?head sha required}"
+
+TYPES="feat|fix|docs|style|refactor|perf|test|build|ci|chore|revert"
+# type(optional scope)!: summary   — summary must be non-empty and lowercase-ish
+PATTERN="^(${TYPES})(\([a-z0-9._/-]+\))?!?: .+"
+
+fail=0
+count=0
+
+# Merge commits are generated by GitHub, not written by a human — skip them.
+while IFS= read -r sha; do
+  [ -z "$sha" ] && continue
+  subject=$(git log -1 --format=%s "$sha")
+  count=$((count + 1))
+
+  if [[ "$subject" =~ $PATTERN ]]; then
+    if [ "${#subject}" -gt 72 ]; then
+      echo "  ! ${sha:0:8}  subject is ${#subject} chars (soft limit 72)"
+      echo "      $subject"
+    else
+      echo "  ok ${sha:0:8}  $subject"
+    fi
+  else
+    echo "  x  ${sha:0:8}  $subject"
+    fail=1
+  fi
+done < <(git rev-list --no-merges "${BASE}..${HEAD}")
+
+if [ "$count" -eq 0 ]; then
+  echo "No non-merge commits in range; nothing to validate."
+  exit 0
+fi
+
+if [ "$fail" -ne 0 ]; then
+  cat <<'MSG'
+
+Some commit subjects are not Conventional Commits.
+
+  <type>(<optional scope>): <summary in the imperative>
+
+  types: feat fix docs style refactor perf test build ci chore revert
+  breaking: append ! after the type, or add a BREAKING CHANGE: footer
+
+  good:  feat(log): accept workouts pasted as free text
+         fix(auth): stop refreshing an expired session on the server
+  bad:   Update  |  changes  |  deployable  |  fixed stuff
+
+Rewrite them with:  git rebase -i <base>   (reword the offending commits)
+MSG
+  exit 1
+fi
+
+echo ""
+echo "All $count commit(s) are Conventional Commits."