create pr for version bump gh bot

.changeset/README.md

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+# Changesets
+
+This directory contains changeset files that track changes.
+
+## Creating a changeset
+
+Run `changeset` or `changeset add` to create a new changeset.
+
+## More info
+
+See https://github.com/browserbase/pychangeset for more information.

.changeset/config.json

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+{
+  "changeTypes": {
+    "major": {
+      "description": "Breaking changes",
+      "emoji": "\ud83d\udca5"
+    },
+    "minor": {
+      "description": "New features",
+      "emoji": "\u2728"
+    },
+    "patch": {
+      "description": "Bug fixes and improvements",
+      "emoji": "\ud83d\udc1b"
+    }
+  },
+  "baseBranch": "main"
+}

.changeset/functional-pink-centipede.md

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+---
+"stagehand": patch
+---
+
+start using pychangeset to track changes

.github/workflows/changesets.yml

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+name: Changesets
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  changesets:
+    name: Create or Update Release PR
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+      - name: Checkout main branch
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v2
+
+      - name: Check for changesets
+        id: check_changesets
+        run: |
+          if ls .changeset/*.md 2>/dev/null | grep -v README.md > /dev/null; then
+            echo "has_changesets=true" >> $GITHUB_OUTPUT
+          else
+            echo "has_changesets=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Get PR metadata
+        if: steps.check_changesets.outputs.has_changesets == 'true'
+        id: pr_metadata
+        run: |
+          # Get the merge commit info
+          COMMIT_SHA="${{ github.sha }}"
+          echo "COMMIT_SHA=$COMMIT_SHA" >> $GITHUB_ENV
+
+          # Try to extract PR info from commit message
+          PR_NUMBER=$(git log -1 --pretty=%B | grep -oP '(?<=#)\d+' | head -1 || echo "")
+          if [ -n "$PR_NUMBER" ]; then
+            echo "PR_NUMBER=$PR_NUMBER" >> $GITHUB_ENV
+
+            # Get PR author using GitHub API
+            PR_AUTHOR=$(gh api repos/${{ github.repository }}/pulls/$PR_NUMBER --jq '.user.login' || echo "")
+            echo "PR_AUTHOR=$PR_AUTHOR" >> $GITHUB_ENV
+          fi
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Generate changelogs and PR description
+        if: steps.check_changesets.outputs.has_changesets == 'true'
+        run: |
+          # Generate changelogs and PR description
+          uvx changeset changelog --output-pr-description pr-description.md
+
+          # Save PR description for later use
+          echo "PR_DESCRIPTION<<EOF" >> $GITHUB_ENV
+          cat pr-description.md >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
+          rm pr-description.md
+
+      - name: Bump versions
+        if: steps.check_changesets.outputs.has_changesets == 'true'
+        run: |
+          uvx changeset version --skip-changelog
+
+      - name: Commit changes
+        if: steps.check_changesets.outputs.has_changesets == 'true'
+        id: commit
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+          # Add all changes
+          git add .
+
+          # Commit if there are changes
+          if ! git diff --cached --quiet; then
+            git commit -m "Version packages and update changelogs"
+            echo "has_changes=true" >> $GITHUB_OUTPUT
+          else
+            echo "has_changes=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Force push to changeset branch
+        if: steps.check_changesets.outputs.has_changesets == 'true' && steps.commit.outputs.has_changes == 'true'
+        run: |
+          # Force push to the changeset-release branch
+          git push origin HEAD:changeset-release --force
+
+      - name: Create or update PR
+        if: steps.check_changesets.outputs.has_changesets == 'true' && steps.commit.outputs.has_changes == 'true'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const { data: prs } = await github.rest.pulls.list({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              head: `${context.repo.owner}:changeset-release`,
+              base: 'main',
+              state: 'open'
+            });
+
+            const prBody = process.env.PR_DESCRIPTION;
+            const prTitle = '🚀 Release packages';
+
+            if (prs.length > 0) {
+              // Update existing PR
+              const pr = prs[0];
+              await github.rest.pulls.update({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                pull_number: pr.number,
+                title: prTitle,
+                body: prBody
+              });
+              console.log(`Updated PR #${pr.number}`);
+            } else {
+              // Create new PR
+              const { data: pr } = await github.rest.pulls.create({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                title: prTitle,
+                body: prBody,
+                head: 'changeset-release',
+                base: 'main'
+              });
+              console.log(`Created PR #${pr.number}`);
+            }

.github/workflows/check-changeset.yml

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+name: Check Changeset
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+
+jobs:
+  check-changeset:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v2
+
+      - name: Check for changeset
+        run: |
+          uvx changeset check-changeset