chore: import upstream snapshot with attribution

.github/ISSUE_TEMPLATE/bug-report.md

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+---
+name: Bug Report
+about: Create a report to help us improve
+title: "[Bug] <Replace this with a descriptive title>"
+labels: bug
+assignees: ''
+
+---
+
+# Description
+A clear and concise description of what the bug is.
+
+# How to Reproduce
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+# Expected Behavior
+A clear and concise description of what you expected to happen.
+
+# Environment
+ - OS: [e.g. iOS]
+ - Python version [e.g. 3.12]
+ - Parlant version [e.g. 1.5.1]
+
+# Discussion
+Add any other context or open questions about the problem here.

.github/ISSUE_TEMPLATE/feature-request.md

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+---
+name: Feature Request
+about: Suggest an idea for this project
+title: "[Enhancement] <Replace this with a descriptive title>"
+labels: enhancement
+assignees: ''
+
+---
+
+# Motivation
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+# Solution Proposal
+A clear and concise description of what you want to happen.
+
+# Discussion
+Add any other context or open questions about the feature request here.

.github/dco.yml

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+allowRemediationCommits:
+  individual: true
+require:
+  members: false

.github/workflows/ci-test.yml

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+name: Verify and Test
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "develop" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-24.04
+
+    strategy:
+      matrix:
+        python-version: ["3.10"]
+
+    steps:
+    - name: checkout branch commit
+      uses: actions/checkout@v4
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install uv
+      run: pip install uv
+
+    - name: Initial Configs
+      run: |
+        git config --local core.hooksPath .githooks/
+        chmod +x .githooks/pre-commit .githooks/pre-push
+
+    - name: Install packages
+      run: python scripts/install_packages.py
+
+    - name: install just
+      uses: extractions/setup-just@v2
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Test Parlant (deterministic)
+      if: always()
+      env:
+        OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+      run: just test-deterministic
+    
+    - name: Test Parlant (core-stable)
+      if: always()
+      env:
+        OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+      run: just test-core-stable
+    
+    - name: Test Parlant (core-unstable)
+      if: always()
+      env:
+        OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+      run: just test-core-unstable
+    
+    - name: test log artifacts
+      if: always()
+      uses: actions/upload-artifact@v4
+      with:
+        name: testresults
+        path: logs/*

.github/workflows/docker-publish.yml

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+name: Docker
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+on:
+  schedule:
+    - cron: '44 23 * * *'
+  push:
+    branches: [ "develop" ]
+    # Publish semver tags as releases.
+    tags: [ 'v*.*.*' ]
+  pull_request:
+    branches: [ "develop" ]
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: emcie-co/parlant
+
+jobs:
+  build:
+
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: read
+      packages: write
+      # This is used to complete the identity challenge
+      # with sigstore/fulcio when running outside of PRs.
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # Install the cosign tool except on PR
+      # https://github.com/sigstore/cosign-installer
+      - name: Install cosign
+        if: github.event_name != 'pull_request'
+        uses: sigstore/cosign-installer@59acb6260d9c0ba8f4a2f9d9b48431a222b68e20 #v3.5.0
+        with:
+          cosign-release: 'v2.2.4'
+
+      # Set up BuildKit Docker container builder to be able to build
+      # multi-platform images and export cache
+      # https://github.com/docker/setup-buildx-action
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0
+
+      # Login against a Docker registry except on PR
+      # https://github.com/docker/login-action
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@96383f45573cb7f253c731d3b3ab81c87ef81934 # v5.0.0
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=edge
+
+      # Remove unused packages and directories to free up space for a (possibly large) Docker build
+      - name: Cleanup disk space
+        run: |
+          chmod +x ./scripts/ci/github_action_ubuntu_2404_free_space.sh
+          ./scripts/ci/github_action_ubuntu_2404_free_space.sh
+
+      # Build and push Docker image with Buildx (don't push on PR)
+      # https://github.com/docker/build-push-action
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 # v5.0.0
+        with:
+          context: .
+          file: ./Dockerfile
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      # Sign the resulting Docker image digest except on PRs.
+      # This will only write to the public Rekor transparency log when the Docker
+      # repository is public to avoid leaking data.  If you would like to publish
+      # transparency data even for private images, pass --force to cosign below.
+      # https://github.com/sigstore/cosign
+      - name: Sign the published Docker image
+        if: ${{ github.event_name != 'pull_request' }}
+        env:
+          # https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
+          TAGS: ${{ steps.meta.outputs.tags }}
+          DIGEST: ${{ steps.build-and-push.outputs.digest }}
+        # This step uses the identity token to provision an ephemeral certificate
+        # against the sigstore community Fulcio instance.
+        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}

.github/workflows/lint.yml

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+name: Lint
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+
+jobs:
+  build:
+    runs-on: ubuntu-24.04
+
+    strategy:
+      matrix:
+        python-version: ["3.10"]
+
+    steps:
+      - name: checkout branch commit
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install uv
+        run: pip install uv
+
+      - name: Initial Configs
+        run: |
+          git config --local core.hooksPath .githooks/
+          chmod +x .githooks/pre-commit .githooks/pre-push
+
+      - name: Install packages
+        run: python scripts/install_packages.py
+        continue-on-error: false
+
+      - name: Lint packages
+        run: python scripts/lint.py
+        continue-on-error: false