"chore: migrate Pyright branding to Vipeye and drop mypy_primer CI

- Rewrite README/docs for Vipeye, update CI/Azure pipelines and scripts
- Remove mypy_primer workflows and mypy comparison doc
- Keep upstream links and external tool references intact"

.github/workflows/mypy_primer_comment.yaml

@@ -1,104 +0,0 @@
-# This workflow runs when the "Run mypy_primer on PR" workflow completes.
-# It downloads the diff from the other workflow instances and creates
-# a summary comment in the PR.
-name: Comment with mypy_primer diff
-
-on:
-  workflow_run:
-    workflows:
-      - Run mypy_primer on PR
-    types:
-      - completed
-
-permissions:
-  contents: read
-  pull-requests: write
-
-jobs:
-  comment:
-    name: Comment PR from mypy_primer
-    runs-on: ubuntu-latest
-    if: ${{ github.event.workflow_run.conclusion == 'success' }}
-    steps:
-      - name: Download diffs
-        uses: actions/github-script@v7
-        with:
-          script: |
-            const fs = require('fs');
-            const artifacts = await github.rest.actions.listWorkflowRunArtifacts({
-               owner: context.repo.owner,
-               repo: context.repo.repo,
-               run_id: ${{ github.event.workflow_run.id }},
-            });
-            const matchedArtifacts = artifacts.data.artifacts.filter((artifact) =>
-              artifact.name.startsWith("mypy_primer_diffs"));
-
-            for (let i = 0; i < matchedArtifacts.length; i++) {
-              const matchArtifact = matchedArtifacts[i];
-              const download = await github.rest.actions.downloadArtifact({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                artifact_id: matchArtifact.id,
-                archive_format: "zip",
-              });
-              fs.writeFileSync(`diff_${i}.zip`, Buffer.from(download.data));
-            }
-
-      - run: unzip diff_\*.zip
-      - run: |
-          cat diff_*.txt | tee fulldiff.txt
-
-      - name: Post comment
-        id: post-comment
-        uses: actions/github-script@v7
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          script: |
-            const MAX_CHARACTERS = 30000
-            const MAX_CHARACTERS_PER_PROJECT = MAX_CHARACTERS / 3
-
-            const fs = require('fs')
-            let data = fs.readFileSync('fulldiff.txt', { encoding: 'utf8' })
-
-            function truncateIfNeeded(original, maxLength) {
-              if (original.length <= maxLength) {
-                return original
-              }
-              let truncated = original.substring(0, maxLength)
-              // further, remove last line that might be truncated
-              truncated = truncated.substring(0, truncated.lastIndexOf('\n'))
-              let lines_truncated = original.split('\n').length - truncated.split('\n').length
-              return `${truncated}\n\n... (truncated ${lines_truncated} lines) ...`
-            }
-
-            const projects = data.split('\n\n')
-            // don't let one project dominate
-            data = projects.map(project => truncateIfNeeded(project, MAX_CHARACTERS_PER_PROJECT)).join('\n\n')
-            // posting comment fails if too long, so truncate
-            data = truncateIfNeeded(data, MAX_CHARACTERS)
-
-            console.log("Diff from mypy_primer:")
-            console.log(data)
-
-            let body
-            if (data.trim()) {
-              body = 'Diff from [mypy_primer](https://github.com/hauntsaninja/mypy_primer), showing the effect of this PR on open source code:\n```diff\n' + data + '```'
-            } else {
-              body = "According to [mypy_primer](https://github.com/hauntsaninja/mypy_primer), this change doesn't affect type check results on a corpus of open source code. ✅"
-            }
-            const prNumber = parseInt(fs.readFileSync("pr_number.txt", { encoding: "utf8" }))
-            await github.rest.issues.createComment({
-              issue_number: prNumber,
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              body
-            })
-            return prNumber
-
-      - name: Hide old comments
-        # v0.4.0
-        uses: kanga333/comment-hider@c12bb20b48aeb8fc098e35967de8d4f8018fffdf
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          leave_visible: 1
-          issue_number: ${{ steps.post-comment.outputs.result }}

.github/workflows/mypy_primer_pr.yaml

@@ -1,122 +0,0 @@
-# This workflow runs mypy_primer, a tool that runs vipeye on a variety
-# of open-source Python projects that are known to type check with vipeye.
-# It builds vipeye from the latest PR commit and the merge base of the PR
-# and compares the output of both. It uploads the diffs as an artifact and
-# creates a PR comment with the results (with the help of the
-# mypy_primer_comment action).
-
-# This workflow definition borrows liberally from the mypy repo. The original
-# workflow was designed to work in a sharded manner where n copies of
-# mypy_primer are started in parallel. Each instance runs 1/n of the projects.
-# For now, we run only one instance because vipeye is fast, and the number
-# of projects that use vipeye for type checking is small. To change this in
-# the future, change the 'shard_index' matrix to [0, 1, ..., n-1] and set
-# 'num-shards' to n.
-
-name: Run mypy_primer on PR
-
-env:
-  NODE_VERSION: '22.x' # Shipped with VS Code.
-
-on:
-  # Run on the creation or update of a PR.
-  pull_request:
-    paths:
-      - 'packages/vipeye/**'
-      - 'packages/vipeye-internal/src/**'
-      - 'packages/vipeye-internal/typeshed-fallback/**'
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
-jobs:
-  mypy_primer:
-    name: Run mypy_primer on PR
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-    strategy:
-      matrix:
-        shard-index: [0, 1, 2, 3, 4, 5, 6, 7]
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          path: pyright_to_test
-          fetch-depth: 2
-          fetch-tags: false
-      - uses: actions/setup-python@v5
-        with:
-          python-version: '3.11'
-      - uses: actions/setup-node@v6
-        with:
-          node-version: ${{ env.NODE_VERSION }}
-          cache: 'npm'
-          cache-dependency-path: 'pyright_to_test/**/package-lock.json'
-      - name: Install dependencies
-        run: |
-          python -m pip install -U pip
-          pip install git+https://github.com/hauntsaninja/mypy_primer.git
-      - name: Run mypy_primer
-        shell: bash
-        env:
-          # mypy_primer installs both the PR and base commits. The base commit can contain
-          # historical peer dependency conflicts that should not block primer comparisons.
-          NPM_CONFIG_LEGACY_PEER_DEPS: 'true'
-        run: |
-          cd pyright_to_test
-          echo "new commit"
-          git rev-list --format=%s --max-count=1 $GITHUB_SHA
-          git branch new_commit $GITHUB_SHA
-
-          MERGE_BASE=$(git rev-parse "$GITHUB_SHA^1")
-          git checkout -b base_commit $MERGE_BASE
-          echo "base commit"
-          git rev-list --format=%s --max-count=1 base_commit
-          # Keep the old checker source at the merge base, but use this PR's
-          # dependency and bundler metadata so the old checkout can install and build.
-          mapfile -t BASE_BUILD_FILES < <(
-            git ls-tree -r --name-only "$GITHUB_SHA" |
-              grep -E '^(package(-lock)?\.json|packages/[^/]+/package(-lock)?\.json|packages/[^/]+/rspack\.config\.js)$'
-          )
-          echo "Using build metadata for mypy_primer base:"
-          printf '%s\n' "${BASE_BUILD_FILES[@]}"
-          git checkout $GITHUB_SHA -- "${BASE_BUILD_FILES[@]}"
-          printf 'legacy-peer-deps=true\n' > .npmrc
-          git add .npmrc "${BASE_BUILD_FILES[@]}"
-          git config user.name github-actions[bot]
-          git config user.email 41898282+github-actions[bot]@users.noreply.github.com
-          git commit -m "Configure build dependencies for mypy_primer base"
-          echo "Prepared mypy_primer base_commit with generated package and rspack build metadata."
-
-          echo ''
-          cd ..
-          npm config set legacy-peer-deps true --location=user
-          npm config get legacy-peer-deps
-          # fail action if exit code isn't zero or one
-          (
-            mypy_primer \
-            --repo pyright_to_test \
-            --type-checker pyright \
-            --new new_commit --old base_commit \
-            --num-shards 8 --shard-index ${{ matrix.shard-index }} \
-            --debug \
-            --output concise \
-            | tee diff_${{ matrix.shard-index }}.txt
-          ) || [ $? -eq 1 ]
-      - name: Upload mypy_primer diff
-        uses: actions/upload-artifact@v4
-        with:
-          name: mypy_primer_diffs_${{ matrix.shard-index }}
-          path: diff_${{ matrix.shard-index }}.txt
-      - if: ${{ matrix.shard-index == 0 }}
-        name: Save PR number
-        run: |
-          echo ${{ github.event.pull_request.number }} | tee pr_number.txt
-      - if: ${{ matrix.shard-index == 0 }}
-        name: Upload PR number
-        uses: actions/upload-artifact@v4
-        with:
-          name: mypy_primer_diffs_pr_number
-          path: pr_number.txt

.github/workflows/mypy_primer_push.yaml

@@ -1,79 +0,0 @@
-# This workflow runs mypy_primer, a tool that runs vipeye on a variety
-# of open-source Python projects that are known to type check with vipeye.
-# It builds vipeye from the latest commit and the last release tag and
-# compares the output of both. It uploads the diffs as an artifact.
-name: Run mypy_primer on push
-
-env:
-  NODE_VERSION: '22.x' # Shipped with VS Code.
-
-on:
-  # Run on all pushes to main.
-  push:
-    branches:
-      - main
-    paths:
-      - 'packages/vipeye/**'
-      - 'packages/vipeye-internal/src/**'
-      - 'packages/vipeye-internal/typeshed-fallback/**'
-  # Also run manually if requested.
-  workflow_dispatch:
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
-jobs:
-  mypy_primer:
-    name: Run mypy_primer on push
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-    strategy:
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          path: pyright_to_test
-          fetch-depth: 0
-      - uses: actions/setup-python@v5
-        with:
-          python-version: '3.11'
-      - uses: actions/setup-node@v6
-        with:
-          node-version: ${{ env.NODE_VERSION }}
-          cache: 'npm'
-          cache-dependency-path: 'pyright_to_test/**/package-lock.json'
-      - name: Install dependencies
-        run: |
-          python -m pip install -U pip
-          pip install git+https://github.com/hauntsaninja/mypy_primer.git
-      - name: Run mypy_primer
-        shell: bash
-        env:
-          # mypy_primer installs both the new and old commits. The old commit can contain
-          # historical peer dependency conflicts that should not block primer comparisons.
-          NPM_CONFIG_LEGACY_PEER_DEPS: 'true'
-        run: |
-          cd pyright_to_test
-          echo "new commit"
-          git rev-list --format=%s --max-count=1 $GITHUB_SHA
-
-          cd ..
-          npm config set legacy-peer-deps true --location=user
-          npm config get legacy-peer-deps
-          # fail action if exit code isn't zero or one
-          (
-            mypy_primer \
-            --repo pyright_to_test \
-            --type-checker pyright \
-            --new $GITHUB_SHA \
-            --debug \
-            --output concise \
-            | tee diff.txt
-          ) || [ $? -eq 1 ]
-      - name: Upload mypy_primer diff
-        uses: actions/upload-artifact@v4
-        with:
-          name: mypy_primer_diffs
-          path: diff.txt