Make the shared lab infrastructure canonical and check it for drift

main.bicep, resources.bicep and main.parameters.json were byte-identical
across Labs A, B and C, and write_env.ps1/.sh and azure.yaml differed only
by a lab name and one guidance line. Nothing told you when one copy was
updated and the others were not.

The copies stay - each lab folder has to be self-contained, so a learner
who opens one lab has everything it needs without traversing to a shared
folder. What changes is that they are now generated from a canonical source
and verified.

- Labfiles/_shared/ holds the canonical files, with three tokens for the
  values that genuinely differ per lab.
- manifest.yml lists the labs that consume them.
- sync.py regenerates the copies; --check fails with a diff if any has
  drifted, and runs in the content-checks workflow.
- Generated files carry a header saying so. main.parameters.json does not,
  because JSON has no comment syntax, but it is still checked.

check_env.py, bootstrap_agent.py and requirements.txt are genuinely
lab-specific and are deliberately not managed here.

Verified by regenerating all 15 files: every one is identical to what was
already committed apart from the added header, so the templates reproduce
the current content exactly.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: dc4690cc-57d6-48a7-abc8-bc8570113ab1

Author: ivorb

.github/workflows/content-checks.yml

@@ -50,3 +50,7 @@ jobs:
       - name: Line endings match .gitattributes
         if: always()
         run: python tools/checks/check_line_endings.py
+
+      - name: Shared lab infrastructure is in sync
+        if: always()
+        run: python Labfiles/_shared/sync.py --check

Labfiles/A-build-and-extend-ai-agents/azure.yaml

@@ -1,3 +1,7 @@
+# GENERATED FROM Labfiles/_shared/ - DO NOT EDIT THIS COPY.
+# Edit the file under Labfiles/_shared/, then run:
+#     python Labfiles/_shared/sync.py
+
 # azd configuration for the Tailwind Traders lab (OPTIONAL infra path).
 #
 # This is a convenience for learners/instructors who want to provision the

Labfiles/A-build-and-extend-ai-agents/infra/main.bicep

@@ -1,3 +1,7 @@
+// GENERATED FROM Labfiles/_shared/ - DO NOT EDIT THIS COPY.
+// Edit the file under Labfiles/_shared/, then run:
+//     python Labfiles/_shared/sync.py
+
 // Optional azd infrastructure for the Tailwind Traders lab.
 //
 // Provisions a Microsoft Foundry (Azure AI Services) resource, a Foundry

Labfiles/A-build-and-extend-ai-agents/infra/resources.bicep

@@ -1,3 +1,7 @@
+// GENERATED FROM Labfiles/_shared/ - DO NOT EDIT THIS COPY.
+// Edit the file under Labfiles/_shared/, then run:
+//     python Labfiles/_shared/sync.py
+
 // Foundry account + project + model deployment for the lab.
 // Deployed into the resource group created by main.bicep.
 

Labfiles/A-build-and-extend-ai-agents/setup/write_env.ps1

@@ -1,3 +1,7 @@
+# GENERATED FROM Labfiles/_shared/ - DO NOT EDIT THIS COPY.
+# Edit the file under Labfiles/_shared/, then run:
+#     python Labfiles/_shared/sync.py
+
 # Copies the endpoint + model deployment name that 'azd up' just provisioned
 # into the lab's Python/.env, so the task scripts can read them.
 #

Labfiles/A-build-and-extend-ai-agents/setup/write_env.sh

@@ -1,4 +1,8 @@
 #!/bin/sh
+# GENERATED FROM Labfiles/_shared/ - DO NOT EDIT THIS COPY.
+# Edit the file under Labfiles/_shared/, then run:
+#     python Labfiles/_shared/sync.py
+
 # Copies the endpoint + model deployment name that 'azd up' just provisioned
 # into the lab's Python/.env, so the task scripts can read them.
 #

Labfiles/B-integrate-agents-with-enterprise-knowledge-and-m365/azure.yaml

@@ -1,3 +1,7 @@
+# GENERATED FROM Labfiles/_shared/ - DO NOT EDIT THIS COPY.
+# Edit the file under Labfiles/_shared/, then run:
+#     python Labfiles/_shared/sync.py
+
 # azd configuration for the Tailwind Traders enterprise-knowledge lab (OPTIONAL infra path).
 #
 # This is a convenience for learners/instructors who want to provision the

Labfiles/B-integrate-agents-with-enterprise-knowledge-and-m365/infra/main.bicep

@@ -1,3 +1,7 @@
+// GENERATED FROM Labfiles/_shared/ - DO NOT EDIT THIS COPY.
+// Edit the file under Labfiles/_shared/, then run:
+//     python Labfiles/_shared/sync.py
+
 // Optional azd infrastructure for the Tailwind Traders lab.
 //
 // Provisions a Microsoft Foundry (Azure AI Services) resource, a Foundry

Labfiles/B-integrate-agents-with-enterprise-knowledge-and-m365/infra/resources.bicep

@@ -1,3 +1,7 @@
+// GENERATED FROM Labfiles/_shared/ - DO NOT EDIT THIS COPY.
+// Edit the file under Labfiles/_shared/, then run:
+//     python Labfiles/_shared/sync.py
+
 // Foundry account + project + model deployment for the lab.
 // Deployed into the resource group created by main.bicep.
 

Labfiles/B-integrate-agents-with-enterprise-knowledge-and-m365/setup/write_env.ps1

@@ -1,3 +1,7 @@
+# GENERATED FROM Labfiles/_shared/ - DO NOT EDIT THIS COPY.
+# Edit the file under Labfiles/_shared/, then run:
+#     python Labfiles/_shared/sync.py
+
 # Copies the endpoint + model deployment name that 'azd up' just provisioned
 # into the lab's Python/.env, so the task scripts can read them.
 #