diff --git a/.github/workflows/add-minutes.yml b/.github/workflows/add-minutes.yml
index 09c09a9..a0654cf 100644
--- a/.github/workflows/add-minutes.yml
+++ b/.github/workflows/add-minutes.yml
@@ -1,4 +1,4 @@
-name: Link to session minutes
+name: [M] Link to session minutes
 
 on:
   workflow_dispatch:
@@ -15,12 +15,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
 
       - name: Checkout latest version of release script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: main
 
diff --git a/.github/workflows/init-labels.yml b/.github/workflows/init-labels.yml
index fe6e9fb..b211423 100644
--- a/.github/workflows/init-labels.yml
+++ b/.github/workflows/init-labels.yml
@@ -1,4 +1,4 @@
-name: Initialize labels
+name: [M] Initialize labels
 
 on:
   workflow_dispatch:
@@ -9,12 +9,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
 
       - name: Checkout latest version of release script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: main
 
diff --git a/.github/workflows/setup-irc.yml b/.github/workflows/setup-irc.yml
index a5a6cdc..db5f363 100644
--- a/.github/workflows/setup-irc.yml
+++ b/.github/workflows/setup-irc.yml
@@ -1,4 +1,4 @@
-name: Setup IRC channels
+name: [M] Setup IRC channels
 
 on:
   workflow_dispatch:
@@ -23,12 +23,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
 
       - name: Checkout latest version of release script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: main
 
diff --git a/.github/workflows/suggest-grid.yml b/.github/workflows/suggest-grid.yml
new file mode 100644
index 0000000..65efc4e
--- /dev/null
+++ b/.github/workflows/suggest-grid.yml
@@ -0,0 +1,84 @@
+name: "[M] Create a schedule"
+
+on:
+  workflow_dispatch:
+    inputs:
+      preservelist:
+        description: 'Space-separated (no comma!) list of session numbers whose meetings must be preserved. Or "all" to preserve all meetings. Or "none" to ignore existing meetings.'
+        required: true
+        default: 'all'
+        type: string
+      exceptlist:
+        description: 'Only makes sense when previous value is "all"! Space-separated (no comma!) list of session numbers whose meetings are to be discarded. Or "none" to mean "preserve all meetings".'
+        required: true
+        default: 'none'
+        type: string
+      apply:
+        description: 'Whether to suggest a schedule (default) or apply it.'
+        required: true
+        default: 'suggest'
+        type: choice
+        options:
+          - suggest
+          - apply
+      seed:
+        description: 'The seed to use to shuffle the array of sessions initially.'
+        default: ''
+        type: string
+
+jobs:
+  suggest-grid:
+    name: Create a schedule
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - name: Checkout latest version of release script
+        uses: actions/checkout@v4
+        with:
+          ref: main
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Create directory to store result
+        run: mkdir .schedule
+
+      - name: Create a schedule
+        # Note the use of YAML "folded style" (through `>`) to split the
+        # command into multiple lines, and of the ternary like operator to set
+        # CLI parameters correctly. For details, see:
+        # https://yaml-multiline.info/
+        # https://docs.github.com/en/actions/learn-github-actions/expressions#example
+        run: >
+          npx tpac-breakouts schedule
+          --preserve ${{ inputs.preservelist }}
+          --except ${{ inputs.exceptlist }}
+          ${{ inputs.seed && format('--seed {0}', inputs.seed) || '' }}
+          ${{ inputs.apply == 'apply' && ' --apply' || '' }} > .schedule/index.html
+        env:
+          # URL of the annual TPAC XXXX breakout project.
+          # The PROJECT_OWNER and PROJECT_NUMBER variables must be defined on
+          # the repository. PROJECT_OWNER_TYPE needs to be set to "user" if
+          # project belongs to a user. It may be omitted otherwise (or set to
+          # 'org"').
+          PROJECT_OWNER: ${{ vars.PROJECT_OWNER_TYPE || 'organization' }}/${{ vars.PROJECT_OWNER || 'w3c' }}
+          PROJECT_NUMBER: ${{ vars.PROJECT_NUMBER }}
+
+          # Same valid Personal Access Token (classic version) as above, with
+          # project and public_repo scope.
+          GRAPHQL_TOKEN: ${{ secrets.GRAPHQL_TOKEN }}
+          GH_TOKEN: ${{ secrets.GRAPHQL_TOKEN }}
+
+          # Mapping between chair GitHub identities and W3C IDs must be stored
+          # in a variable. Structure is a JSON object with identities as keys.
+          W3CID_MAP: ${{ vars.W3CID_MAP }}
+
+      - name: Create ZIP artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: schedule
+          path: .schedule
diff --git a/.github/workflows/update-calendar.yml b/.github/workflows/update-calendar.yml
index 0dddbce..2974c51 100644
--- a/.github/workflows/update-calendar.yml
+++ b/.github/workflows/update-calendar.yml
@@ -1,4 +1,4 @@
-name: Update TPAC calendar based on sessions info
+name: "[M] Update W3C calendar"
 
 on:
   workflow_dispatch:
@@ -20,26 +20,24 @@ on:
 
 jobs:
   update-calendar:
-    name: Update TPAC calendar
+    name: Update W3C calendar
     runs-on: ubuntu-latest
     steps:
       - name: Setup node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
 
       - name: Checkout latest version of release script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: main
 
-      # Note: no "package-lock.json" and no "npm ci" on purpose to retrieve
-      # latest version of w3c/tpac-breakouts tools (which are unversioned)
       - name: Install dependencies
-        run: npm install
+        run: npm ci
 
       - name: Convert session issues to calendar entries.
-        run: npx update-calendar ${{ inputs.sessionNumber }} ${{ inputs.calendarstatus }}
+        run: npx tpac-breakouts sync-calendar ${{ inputs.sessionNumber }} --status ${{ inputs.calendarstatus }}
         env:
           # URL of the annual TPAC XXXX breakout project.
           # The PROJECT_OWNER and PROJECT_NUMBER variables must be defined on
@@ -52,6 +50,7 @@ jobs:
           # A valid Personal Access Token (classic version) with project
           # and public_repo scope.
           GRAPHQL_TOKEN: ${{ secrets.GRAPHQL_TOKEN }}
+          GH_TOKEN: ${{ secrets.GRAPHQL_TOKEN }}
 
           # Information about the team user on behalf of which the updates to
           # the calendar will be made. The password must obviously be stored
@@ -66,5 +65,5 @@ jobs:
 
           # Mapping between chair GitHub identities and W3C IDs must be stored
           # in a variable. Structure is a JSON object with identities as keys.
-          CHAIR_W3CID: ${{ vars.CHAIR_W3CID }}
+          W3CID_MAP: ${{ vars.W3CID_MAP }}
 
diff --git a/.github/workflows/validate-grid.yml b/.github/workflows/validate-grid.yml
index 995a8ef..1eaf14e 100644
--- a/.github/workflows/validate-grid.yml
+++ b/.github/workflows/validate-grid.yml
@@ -1,4 +1,4 @@
-name: Validate breakout session grid
+name: "[M] Validate all sessions"
 
 on:
   workflow_dispatch:
@@ -14,26 +14,24 @@ on:
 
 jobs:
   validate-grid:
-    name: Validate breakout session grid
+    name: Validate session grid
     runs-on: ubuntu-latest
     steps:
       - name: Setup node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
 
       - name: Checkout latest version of release script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: main
 
-      # Note: no "package-lock.json" and no "npm ci" on purpose to retrieve
-      # latest version of w3c/tpac-breakouts tools (which are unversioned)
       - name: Install dependencies
-        run: npm install
+        run: npm ci
 
-      - name: Validate grid and update issue labels accordingly
-        run: npx validate-grid ${{ inputs.validation }}
+      - name: Validate grid and update project fields
+        run: npx tpac-breakouts validate all --what ${{ inputs.validation }}
         env:
           # URL of the annual TPAC XXXX breakout project.
           # The PROJECT_OWNER and PROJECT_NUMBER variables must be defined on
@@ -46,8 +44,9 @@ jobs:
           # A valid Personal Access Token (classic version) with project
           # and public_repo scope.
           GRAPHQL_TOKEN: ${{ secrets.GRAPHQL_TOKEN }}
+          GH_TOKEN: ${{ secrets.GRAPHQL_TOKEN }}
 
           # Mapping between chair GitHub identities and W3C IDs must be stored
           # in a variable. Structure is a JSON object with identities as keys.
-          CHAIR_W3CID: ${{ vars.CHAIR_W3CID }}
+          W3CID_MAP: ${{ vars.W3CID_MAP }}
 
diff --git a/.github/workflows/validate-session-manual.yml b/.github/workflows/validate-session-manual.yml
index bdec123..29760d3 100644
--- a/.github/workflows/validate-session-manual.yml
+++ b/.github/workflows/validate-session-manual.yml
@@ -1,4 +1,4 @@
-name: Manually validate breakout session issue
+name: "[M] Validate a session"
 
 on:
   workflow_dispatch:
@@ -10,26 +10,24 @@ on:
 
 jobs:
   validate-session:
-    name: Validate breakout session
+    name: Validate session
     runs-on: ubuntu-latest
     steps:
       - name: Setup node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
 
       - name: Checkout latest version of release script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: main
 
-      # Note: no "package-lock.json" and no "npm ci" on purpose to retrieve
-      # latest version of w3c/tpac-breakouts tools (which are unversioned)
       - name: Install dependencies
-        run: npm install
+        run: npm ci
 
-      - name: Validate session and update issue labels accordingly
-        run: npx validate-session ${{ inputs.sessionNumber }}
+      - name: Validate session and update project fields
+        run: npx tpac-breakouts validate ${{ inputs.sessionNumber }} --what everything
         env:
           # URL of the annual TPAC XXXX breakout project.
           # The PROJECT_OWNER and PROJECT_NUMBER variables must be defined on
@@ -42,8 +40,9 @@ jobs:
           # Same valid Personal Access Token (classic version) as above, with
           # project and public_repo scope.
           GRAPHQL_TOKEN: ${{ secrets.GRAPHQL_TOKEN }}
+          GH_TOKEN: ${{ secrets.GRAPHQL_TOKEN }}
 
           # Mapping between chair GitHub identities and W3C IDs must be stored
           # in a variable. Structure is a JSON object with identities as keys.
-          CHAIR_W3CID: ${{ vars.CHAIR_W3CID }}
+          W3CID_MAP: ${{ vars.W3CID_MAP }}
 
diff --git a/.github/workflows/validate-session.yml b/.github/workflows/validate-session.yml
index 7b75946..f16f081 100644
--- a/.github/workflows/validate-session.yml
+++ b/.github/workflows/validate-session.yml
@@ -1,4 +1,4 @@
-name: Validate breakout session issue and update calendar
+name: "[A] Validate session and update W3C calendar"
 
 on:
   issues:
@@ -14,25 +14,23 @@ on:
 
 jobs:
   validate-session:
-    name: Validate breakout session
+    name: Validate session and update W3C calendar
     runs-on: ubuntu-latest
     # We're only interested in "session" issues
     if: ${{ contains(github.event.issue.labels.*.name, 'session') }}
     steps:
       - name: Setup node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
 
       - name: Checkout latest version of release script
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: main
 
-      # Note: no "package-lock.json" and no "npm ci" on purpose to retrieve
-      # latest version of w3c/tpac-breakouts tools (which are unversioned)
       - name: Install dependencies
-        run: npm install
+        run: npm ci
 
       - name: Add issue to TPAC breakout session project
         if: ${{ github.event.action == 'opened' || github.event.action == 'reopened' }}
@@ -56,10 +54,10 @@ jobs:
           github-token: ${{ secrets.GRAPHQL_TOKEN }}
 
       - name: Add thank you comment with links to documentation
-        if: ${{ github.event.action == 'opened' }}
+        if: ${{ false && github.event.action == 'opened' }}
         run: gh issue comment "$NUMBER" --body-file "$BODY_FILE"
         env:
-          GITHUB_TOKEN: ${{ secrets.GRAPHQL_TOKEN }}
+          GH_TOKEN: ${{ secrets.GRAPHQL_TOKEN }}
           GH_REPO: ${{ github.repository }}
           NUMBER: ${{ github.event.issue.number }}
           BODY_FILE: .github/session-created.md
@@ -69,7 +67,7 @@ jobs:
         shell: bash
 
       - name: Validate session and update issue labels accordingly
-        run: npx validate-session ${{ github.event.issue.number }} changes.json
+        run: npx tpac-breakouts validate ${{ github.event.issue.number }} --changes changes.json --what everything
         env:
           # See above for PROJECT_XX variables
           PROJECT_OWNER: ${{ vars.PROJECT_OWNER_TYPE || 'organization' }}/${{ vars.PROJECT_OWNER || 'w3c' }}
@@ -81,10 +79,10 @@ jobs:
 
           # Mapping between chair GitHub identities and W3C IDs must be stored
           # in a variable. Structure is a JSON object with identities as keys.
-          CHAIR_W3CID: ${{ vars.CHAIR_W3CID }}
+          W3CID_MAP: ${{ vars.W3CID_MAP }}
 
       - name: Create/Update calendar entry
-        run: npx update-calendar ${{ github.event.issue.number }} quiet
+        run: npx tpac-breakouts sync-calendar ${{ github.event.issue.number }} --quiet
         env:
           # See above for PROJECT_XX variables
           PROJECT_OWNER: ${{ vars.PROJECT_OWNER_TYPE || 'organization' }}/${{ vars.PROJECT_OWNER || 'w3c' }}
@@ -107,4 +105,4 @@ jobs:
 
           # Mapping between chair GitHub identities and W3C IDs must be stored
           # in a variable. Structure is a JSON object with identities as keys.
-          CHAIR_W3CID: ${{ vars.CHAIR_W3CID }}
+          W3CID_MAP: ${{ vars.W3CID_MAP }}
diff --git a/.github/workflows/view-event.yml b/.github/workflows/view-event.yml
new file mode 100644
index 0000000..c5ea431
--- /dev/null
+++ b/.github/workflows/view-event.yml
@@ -0,0 +1,51 @@
+name: "[M] View current schedule"
+
+on:
+  workflow_dispatch:
+
+jobs:
+  view-event:
+    name: View the current schedule
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - name: Checkout latest version of release script
+        uses: actions/checkout@v4
+        with:
+          ref: main
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Create directory to store result
+        run: mkdir .schedule
+
+      - name: Generate the HTML page
+        run: npx tpac-breakouts view --format html > .schedule/index.html
+        env:
+          # URL of the annual TPAC XXXX breakout project.
+          # The PROJECT_OWNER and PROJECT_NUMBER variables must be defined on
+          # the repository. PROJECT_OWNER_TYPE needs to be set to "user" if
+          # project belongs to a user. It may be omitted otherwise (or set to
+          # 'org"').
+          PROJECT_OWNER: ${{ vars.PROJECT_OWNER_TYPE || 'organization' }}/${{ vars.PROJECT_OWNER || 'w3c' }}
+          PROJECT_NUMBER: ${{ vars.PROJECT_NUMBER }}
+
+          # Same valid Personal Access Token (classic version) as above, with
+          # project and public_repo scope.
+          GRAPHQL_TOKEN: ${{ secrets.GRAPHQL_TOKEN }}
+          GH_TOKEN: ${{ secrets.GRAPHQL_TOKEN }}
+
+          # Mapping between chair GitHub identities and W3C IDs must be stored
+          # in a variable. Structure is a JSON object with identities as keys.
+          W3CID_MAP: ${{ vars.W3CID_MAP }}
+
+      - name: Create ZIP artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: schedule
+          path: .schedule