diff --git a/.github/workflows/agent-performance-analyzer.lock.yml b/.github/workflows/agent-performance-analyzer.lock.yml
index 8ce2e9fdb6..a1c62326c3 100644
--- a/.github/workflows/agent-performance-analyzer.lock.yml
+++ b/.github/workflows/agent-performance-analyzer.lock.yml
@@ -1223,7 +1223,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/meta-orchestrators"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/audit-workflows.lock.yml b/.github/workflows/audit-workflows.lock.yml
index b052f9939d..cf3608f4cc 100644
--- a/.github/workflows/audit-workflows.lock.yml
+++ b/.github/workflows/audit-workflows.lock.yml
@@ -1302,7 +1302,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/audit-workflows"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/code-scanning-fixer.lock.yml b/.github/workflows/code-scanning-fixer.lock.yml
index 5a537927cb..5e60fd3fea 100644
--- a/.github/workflows/code-scanning-fixer.lock.yml
+++ b/.github/workflows/code-scanning-fixer.lock.yml
@@ -1173,7 +1173,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/campaigns"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_campaigns: ${{ steps.push_repo_memory_campaigns.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/copilot-agent-analysis.lock.yml b/.github/workflows/copilot-agent-analysis.lock.yml
index 16c85ac026..e8a1c1e0a5 100644
--- a/.github/workflows/copilot-agent-analysis.lock.yml
+++ b/.github/workflows/copilot-agent-analysis.lock.yml
@@ -1185,7 +1185,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/copilot-agent-analysis"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/copilot-cli-deep-research.lock.yml b/.github/workflows/copilot-cli-deep-research.lock.yml
index 0a67f69a32..d1f5f3c217 100644
--- a/.github/workflows/copilot-cli-deep-research.lock.yml
+++ b/.github/workflows/copilot-cli-deep-research.lock.yml
@@ -1083,7 +1083,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/copilot-cli-research"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/copilot-pr-nlp-analysis.lock.yml b/.github/workflows/copilot-pr-nlp-analysis.lock.yml
index 8e8f66900e..5d7caa8a9b 100644
--- a/.github/workflows/copilot-pr-nlp-analysis.lock.yml
+++ b/.github/workflows/copilot-pr-nlp-analysis.lock.yml
@@ -1180,7 +1180,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/nlp-analysis"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/copilot-pr-prompt-analysis.lock.yml b/.github/workflows/copilot-pr-prompt-analysis.lock.yml
index 7843c85cbf..2e541a6c32 100644
--- a/.github/workflows/copilot-pr-prompt-analysis.lock.yml
+++ b/.github/workflows/copilot-pr-prompt-analysis.lock.yml
@@ -1116,7 +1116,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/prompt-analysis"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/copilot-session-insights.lock.yml b/.github/workflows/copilot-session-insights.lock.yml
index b21b5479db..b06cd86050 100644
--- a/.github/workflows/copilot-session-insights.lock.yml
+++ b/.github/workflows/copilot-session-insights.lock.yml
@@ -1248,7 +1248,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/session-insights"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/daily-cli-performance.lock.yml b/.github/workflows/daily-cli-performance.lock.yml
index d2cb761e3c..f07f034f60 100644
--- a/.github/workflows/daily-cli-performance.lock.yml
+++ b/.github/workflows/daily-cli-performance.lock.yml
@@ -1329,7 +1329,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/cli-performance"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/daily-code-metrics.lock.yml b/.github/workflows/daily-code-metrics.lock.yml
index f72a397dd8..8535246494 100644
--- a/.github/workflows/daily-code-metrics.lock.yml
+++ b/.github/workflows/daily-code-metrics.lock.yml
@@ -1223,7 +1223,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|daily/daily-code-metrics"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/daily-community-attribution.lock.yml b/.github/workflows/daily-community-attribution.lock.yml
index 7255647695..55e34c3154 100644
--- a/.github/workflows/daily-community-attribution.lock.yml
+++ b/.github/workflows/daily-community-attribution.lock.yml
@@ -1129,7 +1129,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|master"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/daily-copilot-token-report.lock.yml b/.github/workflows/daily-copilot-token-report.lock.yml
index 7a3f19c244..65c334493c 100644
--- a/.github/workflows/daily-copilot-token-report.lock.yml
+++ b/.github/workflows/daily-copilot-token-report.lock.yml
@@ -1185,7 +1185,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/token-metrics"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/daily-news.lock.yml b/.github/workflows/daily-news.lock.yml
index cfbc20bfab..50f6b382d9 100644
--- a/.github/workflows/daily-news.lock.yml
+++ b/.github/workflows/daily-news.lock.yml
@@ -1256,7 +1256,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/daily-news"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/daily-testify-uber-super-expert.lock.yml b/.github/workflows/daily-testify-uber-super-expert.lock.yml
index 0b96052c6b..f3554d0153 100644
--- a/.github/workflows/daily-testify-uber-super-expert.lock.yml
+++ b/.github/workflows/daily-testify-uber-super-expert.lock.yml
@@ -1212,7 +1212,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/testify-expert"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/deep-report.lock.yml b/.github/workflows/deep-report.lock.yml
index 4cd12565ac..a99a7afcb9 100644
--- a/.github/workflows/deep-report.lock.yml
+++ b/.github/workflows/deep-report.lock.yml
@@ -1284,7 +1284,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/deep-report"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/delight.lock.yml b/.github/workflows/delight.lock.yml
index cf81c8f20f..3198f00a6d 100644
--- a/.github/workflows/delight.lock.yml
+++ b/.github/workflows/delight.lock.yml
@@ -1128,7 +1128,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/delight"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/developer-docs-consolidator.lock.yml b/.github/workflows/developer-docs-consolidator.lock.yml
index 91cc4aade9..4fd925f0ad 100644
--- a/.github/workflows/developer-docs-consolidator.lock.yml
+++ b/.github/workflows/developer-docs-consolidator.lock.yml
@@ -1453,7 +1453,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|master"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/discussion-task-miner.lock.yml b/.github/workflows/discussion-task-miner.lock.yml
index cf28d21f93..9a300321e8 100644
--- a/.github/workflows/discussion-task-miner.lock.yml
+++ b/.github/workflows/discussion-task-miner.lock.yml
@@ -1111,7 +1111,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/discussion-task-miner"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/firewall-escape.lock.yml b/.github/workflows/firewall-escape.lock.yml
index 067c12788f..bc6c82a522 100644
--- a/.github/workflows/firewall-escape.lock.yml
+++ b/.github/workflows/firewall-escape.lock.yml
@@ -1186,7 +1186,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/firewall-escape"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/glossary-maintainer.lock.yml b/.github/workflows/glossary-maintainer.lock.yml
index 9a3d5c6c55..39b0d2dc28 100644
--- a/.github/workflows/glossary-maintainer.lock.yml
+++ b/.github/workflows/glossary-maintainer.lock.yml
@@ -1348,7 +1348,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|master"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/metrics-collector.lock.yml b/.github/workflows/metrics-collector.lock.yml
index 06ac3960bc..cc284f308d 100644
--- a/.github/workflows/metrics-collector.lock.yml
+++ b/.github/workflows/metrics-collector.lock.yml
@@ -685,7 +685,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/meta-orchestrators"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/pr-triage-agent.lock.yml b/.github/workflows/pr-triage-agent.lock.yml
index ceab9e306a..231bebb972 100644
--- a/.github/workflows/pr-triage-agent.lock.yml
+++ b/.github/workflows/pr-triage-agent.lock.yml
@@ -1097,7 +1097,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/pr-triage"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/security-compliance.lock.yml b/.github/workflows/security-compliance.lock.yml
index 18bb482e28..8f1a20cd91 100644
--- a/.github/workflows/security-compliance.lock.yml
+++ b/.github/workflows/security-compliance.lock.yml
@@ -1076,7 +1076,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/campaigns"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/technical-doc-writer.lock.yml b/.github/workflows/technical-doc-writer.lock.yml
index 2404d47110..4cf58be0ad 100644
--- a/.github/workflows/technical-doc-writer.lock.yml
+++ b/.github/workflows/technical-doc-writer.lock.yml
@@ -1352,7 +1352,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|master"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/weekly-blog-post-writer.lock.yml b/.github/workflows/weekly-blog-post-writer.lock.yml
index 3d41d62bf1..44f48bda70 100644
--- a/.github/workflows/weekly-blog-post-writer.lock.yml
+++ b/.github/workflows/weekly-blog-post-writer.lock.yml
@@ -1314,7 +1314,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|master"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/.github/workflows/workflow-health-manager.lock.yml b/.github/workflows/workflow-health-manager.lock.yml
index f3cc3cf707..eceac1c57a 100644
--- a/.github/workflows/workflow-health-manager.lock.yml
+++ b/.github/workflows/workflow-health-manager.lock.yml
@@ -1178,7 +1178,7 @@ jobs:
     permissions:
       contents: write
     concurrency:
-      group: "push-repo-memory-${{ github.repository }}"
+      group: "push-repo-memory-${{ github.repository }}|memory/meta-orchestrators"
       cancel-in-progress: false
     outputs:
       patch_size_exceeded_default: ${{ steps.push_repo_memory_default.outputs.patch_size_exceeded }}
diff --git a/pkg/workflow/repo_memory.go b/pkg/workflow/repo_memory.go
index 29bd7d78ec..8024fd8cb1 100644
--- a/pkg/workflow/repo_memory.go
+++ b/pkg/workflow/repo_memory.go
@@ -13,6 +13,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"regexp"
+	"sort"
 	"strings"
 
 	"github.com/github/gh-aw/pkg/constants"
@@ -547,6 +548,42 @@ func generateRepoMemorySteps(builder *strings.Builder, data *WorkflowData) {
 	}
 }
 
+// buildPushRepoMemoryConcurrencyGroup builds a concurrency group key that is scoped to the
+// specific (target-repo, branch) pairs being written by this push job.  Using the actual
+// write targets—rather than a single repo-wide key—ensures that workflows pushing to
+// different memory branches do not unnecessarily serialise or cancel each other.
+//
+// Key format: "push-repo-memory-${{ github.repository }}|<key1>[|<key2>…]"
+//
+// Each key component is percent-encoded (only `%` and `|` are encoded) before joining
+// with "|", so the separator is always unambiguous even if a user-supplied branch name
+// or target-repo contains a literal "|".  For memories that target a non-default
+// repository, the target repo is prepended to the branch name
+// (e.g., "other-owner%2Fother-repo:memory%2Fbranch" would be encoded if needed) so that
+// distinct targets produce distinct concurrency groups.  The branches are sorted for a
+// deterministic key regardless of the order memories are declared in the frontmatter.
+func buildPushRepoMemoryConcurrencyGroup(memories []RepoMemoryEntry) string {
+	branchKeys := make([]string, 0, len(memories))
+	for _, m := range memories {
+		key := encodeConcurrencyKeyPart(m.BranchName)
+		if m.TargetRepo != "" {
+			key = encodeConcurrencyKeyPart(m.TargetRepo) + ":" + key
+		}
+		branchKeys = append(branchKeys, key)
+	}
+	sort.Strings(branchKeys)
+	return "push-repo-memory-${{ github.repository }}|" + strings.Join(branchKeys, "|")
+}
+
+// encodeConcurrencyKeyPart percent-encodes the characters that would otherwise make the
+// concurrency group key ambiguous: "%" (to avoid double-encoding) and "|" (the separator).
+// All other characters are left as-is so the key remains human-readable in workflow UIs.
+func encodeConcurrencyKeyPart(s string) string {
+	s = strings.ReplaceAll(s, "%", "%25")
+	s = strings.ReplaceAll(s, "|", "%7C")
+	return s
+}
+
 // buildPushRepoMemoryJob creates a job that downloads repo-memory artifacts and pushes them to git branches
 // This job runs after the agent job completes (even if it fails) and requires contents: write permission
 // If threat detection is enabled, only runs if no threats were detected
@@ -729,9 +766,12 @@ func (c *Compiler) buildPushRepoMemoryJob(data *WorkflowData, threatDetectionEna
 		outputs["patch_size_exceeded_"+memory.ID] = fmt.Sprintf("${{ steps.%s.outputs.patch_size_exceeded }}", stepID)
 	}
 
-	// Serialize all push_repo_memory jobs per repository to prevent concurrent git pushes
-	// cancel-in-progress is false so that updates from concurrent agents are queued, not dropped
-	concurrency := c.indentYAMLLines("concurrency:\n  group: \"push-repo-memory-${{ github.repository }}\"\n  cancel-in-progress: false", "    ")
+	// Build a concurrency key scoped to the actual branches being written.
+	// This prevents false serialisation between workflows that push to different memory
+	// branches while still serialising concurrent pushes to the *same* branch.
+	// cancel-in-progress is false so queued pushes are not dropped.
+	concurrencyGroup := buildPushRepoMemoryConcurrencyGroup(data.RepoMemoryConfig.Memories)
+	concurrency := c.indentYAMLLines(fmt.Sprintf("concurrency:\n  group: %q\n  cancel-in-progress: false", concurrencyGroup), "    ")
 
 	job := &Job{
 		Name:        "push_repo_memory",
diff --git a/pkg/workflow/repo_memory_test.go b/pkg/workflow/repo_memory_test.go
index 3f6ee3ae86..54e89ec12d 100644
--- a/pkg/workflow/repo_memory_test.go
+++ b/pkg/workflow/repo_memory_test.go
@@ -1191,3 +1191,93 @@ func TestRepoMemoryNonWikiPushNoAllowedRepos(t *testing.T) {
 	assert.NotContains(t, pushJobOutput, "REPO_MEMORY_ALLOWED_REPOS",
 		"Non-wiki push step should not set REPO_MEMORY_ALLOWED_REPOS")
 }
+
+// TestBuildPushRepoMemoryConcurrencyGroup verifies that the concurrency group key is scoped
+// to the actual branch targets, so workflows pushing to different memory branches do not
+// contend with each other.
+func TestBuildPushRepoMemoryConcurrencyGroup(t *testing.T) {
+	tests := []struct {
+		name     string
+		memories []RepoMemoryEntry
+		expected string
+	}{
+		{
+			name: "single memory uses branch name in key",
+			memories: []RepoMemoryEntry{
+				{ID: "default", BranchName: "memory/daily-news"},
+			},
+			expected: "push-repo-memory-${{ github.repository }}|memory/daily-news",
+		},
+		{
+			name: "multiple memories sorted for deterministic key",
+			memories: []RepoMemoryEntry{
+				{ID: "b", BranchName: "memory/workflow-b"},
+				{ID: "a", BranchName: "memory/workflow-a"},
+			},
+			expected: "push-repo-memory-${{ github.repository }}|memory/workflow-a|memory/workflow-b",
+		},
+		{
+			name: "non-default target repo is prefixed to branch",
+			memories: []RepoMemoryEntry{
+				{ID: "default", BranchName: "memory/shared", TargetRepo: "other-org/other-repo"},
+			},
+			expected: "push-repo-memory-${{ github.repository }}|other-org/other-repo:memory/shared",
+		},
+		{
+			name: "mix of default and custom target repos",
+			memories: []RepoMemoryEntry{
+				{ID: "local", BranchName: "memory/local"},
+				{ID: "remote", BranchName: "memory/remote", TargetRepo: "other-org/other-repo"},
+			},
+			expected: "push-repo-memory-${{ github.repository }}|memory/local|other-org/other-repo:memory/remote",
+		},
+		{
+			name: "branches with hyphens use pipe separator in key",
+			memories: []RepoMemoryEntry{
+				{ID: "a", BranchName: "memory/workflow-a"},
+				{ID: "b", BranchName: "memory/workflow-b"},
+			},
+			// This expectation documents the current use of "|" as the list separator in the key.
+			// If the concurrency key encoding changes (e.g., different delimiter or encoding scheme),
+			// update this test to match the new encoding strategy.
+			expected: "push-repo-memory-${{ github.repository }}|memory/workflow-a|memory/workflow-b",
+		},
+		{
+			name: "pipe in branch name is percent-encoded so the separator stays unambiguous",
+			memories: []RepoMemoryEntry{
+				{ID: "unusual", BranchName: "memory/foo|bar"},
+			},
+			expected: "push-repo-memory-${{ github.repository }}|memory/foo%7Cbar",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := buildPushRepoMemoryConcurrencyGroup(tt.memories)
+			assert.Equal(t, tt.expected, got, "Concurrency group key should match expected value")
+		})
+	}
+}
+
+// TestPushRepoMemoryJobConcurrencyKey verifies that buildPushRepoMemoryJob sets a concurrency
+// key scoped to the actual memory branch rather than a repo-wide key.
+func TestPushRepoMemoryJobConcurrencyKey(t *testing.T) {
+	data := &WorkflowData{
+		RepoMemoryConfig: &RepoMemoryConfig{
+			Memories: []RepoMemoryEntry{
+				{ID: "default", BranchName: "memory/my-workflow"},
+			},
+		},
+	}
+
+	compiler := NewCompiler()
+	pushJob, err := compiler.buildPushRepoMemoryJob(data, false)
+	require.NoError(t, err, "Should build push job without error")
+	require.NotNil(t, pushJob, "Should produce a push job")
+
+	assert.Contains(t, pushJob.Concurrency, "memory/my-workflow",
+		"Concurrency key should include the memory branch name")
+	// Ensure the old repo-wide-only key is not used
+	assert.NotContains(t, pushJob.Concurrency, "push-repo-memory-${{ github.repository }}\"",
+		"Concurrency key should not be the old repo-wide-only key format")
+}