diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index da7036d92f..b22958405d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,6 +26,7 @@ jobs:
   metadata:
     name: Retrieve PR info
     runs-on: ubuntu-latest
+    if: ${{ github.event_name == 'workflow_dispatch' || ! github.event.repository.fork }}
     permissions:
       pull-requests: read
 
diff --git a/.github/workflows/cla_assistant.yml b/.github/workflows/cla_assistant.yml
index 9ca003c520..015835917d 100644
--- a/.github/workflows/cla_assistant.yml
+++ b/.github/workflows/cla_assistant.yml
@@ -9,6 +9,7 @@ name: "CLA bot"
 jobs:
   cla-acknowledgement:
     runs-on: ubuntu-latest
+    if: ${{ ! github.event.repository.fork }}
     name: "Check that the CLA has been acknowledged"
     steps:
       - name: "CLA Assistant"
diff --git a/.github/workflows/clean_caches.yml b/.github/workflows/clean_caches.yml
index 6c39d66608..3e9ba3dd2f 100644
--- a/.github/workflows/clean_caches.yml
+++ b/.github/workflows/clean_caches.yml
@@ -30,7 +30,7 @@ name: Clean GitHub caches
 jobs:
   automatic_cleanup:
     name: Clean up GitHub caches produced by other workflows
-    if: github.event_name == 'workflow_run'
+    if: (${{ github.event_name == 'workflow_dispatch' || ! github.event.repository.fork }} && github.event_name == 'workflow_run')
     permissions: write-all
     runs-on: ubuntu-latest
 
@@ -68,7 +68,7 @@ jobs:
 
   selective_cleanup:
     name: Clean up selective GitHub caches
-    if: (github.event_name == 'workflow_dispatch' && inputs.cache_keys != '' )
+    if: (${{ ! github.event.repository.fork }} && github.event_name == 'workflow_dispatch' && inputs.cache_keys != '' )
     runs-on: ubuntu-latest
     permissions: write-all
 
@@ -84,7 +84,7 @@ jobs:
 
   tar_cleanup:
     name: Clean up Github caches with tar archives
-    if: (github.event_name == 'workflow_dispatch' && inputs.cache_type == 'tar' )
+    if: (${{ ! github.event.repository.fork }} && github.event_name == 'workflow_dispatch' && inputs.cache_type == 'tar' )
     runs-on: ubuntu-latest
     permissions: write-all
 
@@ -101,7 +101,7 @@ jobs:
 
   branch_cleanup:
     name: Clean up branch specific caches
-    if: (github.event_name == 'workflow_dispatch' && inputs.cache_type == 'branch' ) || (github.event_name == 'delete' && github.event.ref_type == 'branch')
+    if: (${{ ! github.event.repository.fork }} && ((github.event_name == 'workflow_dispatch' && inputs.cache_type == 'branch') || (github.event_name == 'delete' && github.event.ref_type == 'branch')))
     runs-on: ubuntu-latest
     permissions: write-all
 
@@ -138,7 +138,7 @@ jobs:
 
   pr_cleanup:
     name: Clean up PR related GitHub caches
-    if: github.event_name == 'pull_request_target'
+    if: (${{ ! github.event.repository.fork }} && github.event_name == 'pull_request_target')
     runs-on: ubuntu-latest
     permissions: write-all
 
diff --git a/.github/workflows/clean_up.yml b/.github/workflows/clean_up.yml
index 1d154c9f28..bd1eb0009b 100644
--- a/.github/workflows/clean_up.yml
+++ b/.github/workflows/clean_up.yml
@@ -22,7 +22,7 @@ name: Clean up
 jobs:
   bot_branches:
     name: Delete temporary bot/* branches
-    if: github.event_name == 'workflow_dispatch' && inputs.delete_temp_branches
+    if: (${{ ! github.event.repository.fork }} && github.event_name == 'workflow_dispatch' && inputs.delete_temp_branches)
     runs-on: ubuntu-latest
 
     steps:
@@ -46,7 +46,7 @@ jobs:
 
   draft_releases:
     name: Delete draft release
-    if: github.event_name == 'workflow_dispatch' && inputs.delete_draft_releases
+    if: (${{ ! github.event.repository.fork }} && github.event_name == 'workflow_dispatch' && inputs.delete_draft_releases)
     runs-on: ubuntu-latest
 
     steps:
@@ -67,6 +67,7 @@ jobs:
 
   ghcr_images:
     name: Clean up GHCR images
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ubuntu-latest
 
     strategy:
@@ -146,6 +147,7 @@ jobs:
   # See also https://github.com/actions/runner/issues/2120
   deployments:
     name: Deployments
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ubuntu-latest
     permissions:
       deployments: write
@@ -177,7 +179,7 @@ jobs:
 
   pr_cleanup:
     name: Clean up documentation previews
-    if: github.event_name == 'pull_request_target'
+    if: (${{ ! github.event.repository.fork }} && github.event_name == 'pull_request_target')
     runs-on: ubuntu-latest
 
     permissions:
diff --git a/.github/workflows/command_dispatch.yml b/.github/workflows/command_dispatch.yml
index 15a7952334..3737803dea 100644
--- a/.github/workflows/command_dispatch.yml
+++ b/.github/workflows/command_dispatch.yml
@@ -7,6 +7,7 @@ name: Slash command dispatch
 jobs:
   preprocessing:
     name: Check for slash command
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ubuntu-latest
     permissions:
       # keep this limited to read permissions for the content only!
diff --git a/.github/workflows/create_cache_command.yml b/.github/workflows/create_cache_command.yml
index 5a129f4006..86fb9bb948 100644
--- a/.github/workflows/create_cache_command.yml
+++ b/.github/workflows/create_cache_command.yml
@@ -15,6 +15,7 @@ name: Create CI cache
 jobs:
   pr_info:
     name: Determine PR info
+    if: ${{ github.event_name == 'workflow_dispatch' || ! github.event.repository.fork }}
     runs-on: ubuntu-latest
 
     outputs:
diff --git a/.github/workflows/delete_tags.yml b/.github/workflows/delete_tags.yml
index 9ffe3401b6..11138b9f21 100644
--- a/.github/workflows/delete_tags.yml
+++ b/.github/workflows/delete_tags.yml
@@ -15,6 +15,7 @@ name: Delete tags
 jobs:
   ghcr_images:
     name: Clean up GHCR image tags
+    if: ${{ github.event_name == 'workflow_dispatch' || ! github.event.repository.fork }}
     runs-on: ubuntu-latest
 
     steps:
diff --git a/.github/workflows/deployments.yml b/.github/workflows/deployments.yml
index c9b7faa995..9a413d1209 100644
--- a/.github/workflows/deployments.yml
+++ b/.github/workflows/deployments.yml
@@ -52,7 +52,7 @@ concurrency:
 jobs:
   metadata:
     name: Prepare build
-    if: github.event_name != 'push' || github.event.created
+    if: (${{ ! github.event.repository.fork }} && (github.event_name != 'push' || github.event.created))
     runs-on: ubuntu-latest
     permissions:
       contents: read
diff --git a/.github/workflows/dev_environment.yml b/.github/workflows/dev_environment.yml
index 62ed0602c0..d91e1fd172 100644
--- a/.github/workflows/dev_environment.yml
+++ b/.github/workflows/dev_environment.yml
@@ -84,6 +84,7 @@ name: CUDA Quantum cached dev images
 jobs:
   metadata:
     name: Metadata
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ubuntu-latest
     permissions:
       contents: read
diff --git a/.github/workflows/docker_images.yml b/.github/workflows/docker_images.yml
index 9295a6d182..aef7293c30 100644
--- a/.github/workflows/docker_images.yml
+++ b/.github/workflows/docker_images.yml
@@ -37,6 +37,7 @@ name: Docker images
 jobs:
   metadata:
     name: Metadata
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ubuntu-latest
     permissions: {}
 
diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index b9dcf23a53..efd419c485 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -26,7 +26,7 @@ jobs:
   publish_docs:
     name: Publish documentation
     runs-on: ubuntu-latest
-    if: github.event_name == 'workflow_dispatch' || github.event.workflow_run.name == 'CI' || (github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.actor.id == '135836288')
+    if: (${{ github.event_name == 'workflow_dispatch' || ! github.event.repository.fork }} && (github.event_name == 'workflow_dispatch' || github.event.workflow_run.name == 'CI' || (github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.actor.id == '135836288')))
 
     permissions:
       contents: write
diff --git a/.github/workflows/gh_registry.yml b/.github/workflows/gh_registry.yml
index da51650fbf..b7d65a8fb5 100644
--- a/.github/workflows/gh_registry.yml
+++ b/.github/workflows/gh_registry.yml
@@ -8,7 +8,7 @@ name: Update GHCR
 jobs:
   ghcr_config:
     name: Read GHCR config
-    if: github.event_name == 'workflow_dispatch' || vars.enabled_workflows == 'all'
+    if: (${{ github.event_name == 'workflow_dispatch' || ! github.event.repository.fork }} && (github.event_name == 'workflow_dispatch' || vars.enabled_workflows == 'all'))
     runs-on: ubuntu-latest
     permissions:
       contents: read
diff --git a/.github/workflows/help_command.yml b/.github/workflows/help_command.yml
index 8ee9dc26a6..59a75f4de3 100644
--- a/.github/workflows/help_command.yml
+++ b/.github/workflows/help_command.yml
@@ -6,7 +6,7 @@ name: Show the slash commands help
 
 jobs:
   example:
-    if: ${{ github.event.client_payload.github.job == 'command_dispatch' }}
+    if: (${{ ! github.event.repository.fork }} && ${{ github.event.client_payload.github.job == 'command_dispatch' }})
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
diff --git a/.github/workflows/integration_tests.yml b/.github/workflows/integration_tests.yml
index eabf810d39..5b8618a15d 100644
--- a/.github/workflows/integration_tests.yml
+++ b/.github/workflows/integration_tests.yml
@@ -80,6 +80,7 @@ jobs:
   # `env` context is unavailable outside of "steps" contexts.
   setup:
     name: Set variables
+    if: ${{ github.event_name == 'workflow_dispatch' || ! github.event.repository.fork }}
     runs-on: ubuntu-latest
     outputs:
       cudaq_test_image: ${{ steps.vars.outputs.cudaq_test_image }}
diff --git a/.github/workflows/nvqc_regression_tests.yml b/.github/workflows/nvqc_regression_tests.yml
index e42dbd7db3..b6af5edfff 100644
--- a/.github/workflows/nvqc_regression_tests.yml
+++ b/.github/workflows/nvqc_regression_tests.yml
@@ -47,6 +47,7 @@ jobs:
   # `env` context is unavailable outside of "steps" contexts.
   setup:
     name: Set variables
+    if: ${{ github.event_name == 'workflow_dispatch' || ! github.event.repository.fork }}
     runs-on: ubuntu-latest
     outputs:
       cudaq_test_image: ${{ steps.vars.outputs.cudaq_test_image }}
diff --git a/.github/workflows/prebuilt_binaries.yml b/.github/workflows/prebuilt_binaries.yml
index 5530c2b673..b47df708bc 100644
--- a/.github/workflows/prebuilt_binaries.yml
+++ b/.github/workflows/prebuilt_binaries.yml
@@ -31,6 +31,7 @@ name: Pre-built binaries
 jobs:
   build_installer:
     name: Build CUDA Quantum assets
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ${{ (contains(inputs.platform, 'arm') && 'linux-arm64-cpu8') || 'linux-amd64-cpu8' }}
     permissions:
       contents: read
@@ -190,6 +191,7 @@ jobs:
 
   build_openmpi:
     name: Minimal OpenMPI installation
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ${{ (contains(inputs.platform, 'arm') && 'linux-arm64-cpu8') || 'linux-amd64-cpu8' }}
     permissions:
       contents: read
@@ -248,6 +250,7 @@ jobs:
 
   create_test_config:
     name: Prepare validation
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ubuntu-latest
     permissions:
       contents: read
diff --git a/.github/workflows/prepare_deployment.yml b/.github/workflows/prepare_deployment.yml
index 4874a70fec..d952d393d1 100644
--- a/.github/workflows/prepare_deployment.yml
+++ b/.github/workflows/prepare_deployment.yml
@@ -14,7 +14,7 @@ jobs:
   pr_info:
     name: Store PR info
     runs-on: ubuntu-latest
-    if: github.event.pull_request.merged == true
+    if: (${{ ! github.event.repository.fork }} && github.event.pull_request.merged == true)
     permissions: {}
 
     steps:
diff --git a/.github/workflows/publishing.yml b/.github/workflows/publishing.yml
index 6f5357d67a..22ff8efb28 100644
--- a/.github/workflows/publishing.yml
+++ b/.github/workflows/publishing.yml
@@ -32,7 +32,7 @@ name: Publishing
 jobs:
   assets:
     name: Assets
-    if: github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success'
+    if: (${{ github.event_name == 'workflow_dispatch' || ! github.event.repository.fork }} && (github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success'))
     runs-on: ubuntu-latest
     permissions:
       contents: read
diff --git a/.github/workflows/publishing_stable.yml b/.github/workflows/publishing_stable.yml
index 1be177b484..5b90687b54 100644
--- a/.github/workflows/publishing_stable.yml
+++ b/.github/workflows/publishing_stable.yml
@@ -16,6 +16,7 @@ name: Push stable release
 jobs:
   ngc_quantum:
     name: Publish to stable
+    if: ${{ github.event_name == 'workflow_dispatch' || ! github.event.repository.fork }}
     runs-on: ubuntu-latest
     permissions:
       contents: read
diff --git a/.github/workflows/python_wheels.yml b/.github/workflows/python_wheels.yml
index e52969f102..441f2675c6 100644
--- a/.github/workflows/python_wheels.yml
+++ b/.github/workflows/python_wheels.yml
@@ -33,6 +33,7 @@ name: Python wheels
 jobs:
   build_wheel:
     name: Build Python ${{ inputs.python_version }} wheel
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ${{ (contains(inputs.platform, 'arm') && 'linux-arm64-cpu8') || 'linux-amd64-cpu8' }}
     permissions:
       contents: read
@@ -136,6 +137,7 @@ jobs:
 
   create_test_config:
     name: Prepare validation
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ubuntu-latest
     permissions:
       contents: read
diff --git a/.github/workflows/repo_checks.yml b/.github/workflows/repo_checks.yml
index f5d92d5b1f..02aae32beb 100644
--- a/.github/workflows/repo_checks.yml
+++ b/.github/workflows/repo_checks.yml
@@ -12,6 +12,7 @@ jobs:
   links:
     runs-on: ubuntu-latest
     name: "Check links"
+    if: ${{ github.event_name == 'workflow_dispatch' || ! github.event.repository.fork }}
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -29,6 +30,7 @@ jobs:
 
   license_headers:
     name: Check license headers
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -39,6 +41,7 @@ jobs:
 
   filters:
     name: Filter files to check
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ubuntu-latest
 
     outputs:
diff --git a/.github/workflows/show_context_command.yml b/.github/workflows/show_context_command.yml
index 7ddbecae11..215371a060 100644
--- a/.github/workflows/show_context_command.yml
+++ b/.github/workflows/show_context_command.yml
@@ -6,7 +6,7 @@ name: Show the context available to slash commands
 
 jobs:
   example:
-    if: ${{ github.event.client_payload.github.job == 'command_dispatch' }}
+    if: (${{ ! github.event.repository.fork }} && ${{ github.event.client_payload.github.job == 'command_dispatch' }})
     runs-on: ubuntu-latest
     steps:
       - name: Show context
diff --git a/.github/workflows/test_in_devenv.yml b/.github/workflows/test_in_devenv.yml
index 16f3670fc5..233f3f3ac7 100644
--- a/.github/workflows/test_in_devenv.yml
+++ b/.github/workflows/test_in_devenv.yml
@@ -27,6 +27,7 @@ name: Run CI within the dev environment container
 jobs:
   build_and_test:
     name: Dev environment (Debug)
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ${{ (contains(inputs.platform, 'arm') && 'linux-arm64-cpu8') || 'linux-amd64-cpu8' }}
     permissions:
       contents: read
@@ -149,6 +150,7 @@ jobs:
 
   build_and_test_python:
     name: Dev environment (Python)
+    if: ${{ ! github.event.repository.fork }}
     runs-on: ${{ (contains(inputs.platform, 'arm') && 'linux-arm64-cpu8') || 'linux-amd64-cpu8' }}
     permissions:
       contents: read