diff --git a/.agents/skills/gstack-connect-chrome/SKILL.md b/.agents/skills/gstack-connect-chrome/SKILL.md
index f1998923..972477b6 100644
--- a/.agents/skills/gstack-connect-chrome/SKILL.md
+++ b/.agents/skills/gstack-connect-chrome/SKILL.md
@@ -29,8 +29,10 @@ _PROACTIVE=$($GSTACK_BIN/gstack-config get proactive 2>/dev/null || echo "true")
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$($GSTACK_BIN/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <($GSTACK_BIN/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -54,6 +56,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`$GSTACK_ROOT/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `$GSTACK_ROOT/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/SKILL.md b/SKILL.md
index a98ce915..aa0d42c5 100644
--- a/SKILL.md
+++ b/SKILL.md
@@ -30,8 +30,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -55,6 +57,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/autoplan/SKILL.md b/autoplan/SKILL.md
index 54a8f213..73bc069f 100644
--- a/autoplan/SKILL.md
+++ b/autoplan/SKILL.md
@@ -39,8 +39,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -64,6 +66,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/benchmark/SKILL.md b/benchmark/SKILL.md
index 47520683..c709caad 100644
--- a/benchmark/SKILL.md
+++ b/benchmark/SKILL.md
@@ -32,8 +32,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -57,6 +59,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/browse/SKILL.md b/browse/SKILL.md
index 9a51c142..0aff8ea1 100644
--- a/browse/SKILL.md
+++ b/browse/SKILL.md
@@ -32,8 +32,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -57,6 +59,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/canary/SKILL.md b/canary/SKILL.md
index e578e689..753c3707 100644
--- a/canary/SKILL.md
+++ b/canary/SKILL.md
@@ -32,8 +32,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -57,6 +59,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/codex/SKILL.md b/codex/SKILL.md
index 19a8e423..40e63103 100644
--- a/codex/SKILL.md
+++ b/codex/SKILL.md
@@ -33,8 +33,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -58,6 +60,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/connect-chrome/SKILL.md b/connect-chrome/SKILL.md
index fc323dec..f6f48e50 100644
--- a/connect-chrome/SKILL.md
+++ b/connect-chrome/SKILL.md
@@ -30,8 +30,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -55,6 +57,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/cso/SKILL.md b/cso/SKILL.md
index 07026ad6..13fe35c6 100644
--- a/cso/SKILL.md
+++ b/cso/SKILL.md
@@ -36,8 +36,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -61,6 +63,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/design-consultation/SKILL.md b/design-consultation/SKILL.md
index 32394b37..190b84e0 100644
--- a/design-consultation/SKILL.md
+++ b/design-consultation/SKILL.md
@@ -37,8 +37,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -62,6 +64,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/design-review/SKILL.md b/design-review/SKILL.md
index 55674c3b..34c9e331 100644
--- a/design-review/SKILL.md
+++ b/design-review/SKILL.md
@@ -37,8 +37,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -62,6 +64,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/document-release/SKILL.md b/document-release/SKILL.md
index 7da2307b..a44dbf7d 100644
--- a/document-release/SKILL.md
+++ b/document-release/SKILL.md
@@ -34,8 +34,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -59,6 +61,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/investigate/SKILL.md b/investigate/SKILL.md
index 3cf47b5d..3f3d1c84 100644
--- a/investigate/SKILL.md
+++ b/investigate/SKILL.md
@@ -48,8 +48,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -73,6 +75,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/land-and-deploy/SKILL.md b/land-and-deploy/SKILL.md
index becc6b1c..b3e5c34e 100644
--- a/land-and-deploy/SKILL.md
+++ b/land-and-deploy/SKILL.md
@@ -31,8 +31,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -56,6 +58,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/office-hours/SKILL.md b/office-hours/SKILL.md
index 345f4c00..14910862 100644
--- a/office-hours/SKILL.md
+++ b/office-hours/SKILL.md
@@ -39,8 +39,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -64,6 +66,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/plan-ceo-review/SKILL.md b/plan-ceo-review/SKILL.md
index 60441158..614823bc 100644
--- a/plan-ceo-review/SKILL.md
+++ b/plan-ceo-review/SKILL.md
@@ -37,8 +37,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -62,6 +64,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/plan-design-review/SKILL.md b/plan-design-review/SKILL.md
index 31389bbc..1328222e 100644
--- a/plan-design-review/SKILL.md
+++ b/plan-design-review/SKILL.md
@@ -35,8 +35,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -60,6 +62,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/plan-eng-review/SKILL.md b/plan-eng-review/SKILL.md
index e9997d84..48cd2d1e 100644
--- a/plan-eng-review/SKILL.md
+++ b/plan-eng-review/SKILL.md
@@ -36,8 +36,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -61,6 +63,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/qa-only/SKILL.md b/qa-only/SKILL.md
index d12d4284..8fafc61e 100644
--- a/qa-only/SKILL.md
+++ b/qa-only/SKILL.md
@@ -32,8 +32,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -57,6 +59,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/qa/SKILL.md b/qa/SKILL.md
index ab517052..7173e931 100644
--- a/qa/SKILL.md
+++ b/qa/SKILL.md
@@ -38,8 +38,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -63,6 +65,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/retro/SKILL.md b/retro/SKILL.md
index e048a38a..0b004fe6 100644
--- a/retro/SKILL.md
+++ b/retro/SKILL.md
@@ -32,8 +32,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -57,6 +59,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/review/SKILL.md b/review/SKILL.md
index b06e38e2..66a7aaef 100644
--- a/review/SKILL.md
+++ b/review/SKILL.md
@@ -35,8 +35,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -60,6 +62,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/setup-browser-cookies/SKILL.md b/setup-browser-cookies/SKILL.md
index 95df0acb..c20de97f 100644
--- a/setup-browser-cookies/SKILL.md
+++ b/setup-browser-cookies/SKILL.md
@@ -29,8 +29,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -54,6 +56,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/setup-deploy/SKILL.md b/setup-deploy/SKILL.md
index 9d5eb3a9..fed3f07e 100644
--- a/setup-deploy/SKILL.md
+++ b/setup-deploy/SKILL.md
@@ -35,8 +35,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -60,6 +62,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.
diff --git a/ship/SKILL.md b/ship/SKILL.md
index f3f2ec01..ba6ae76e 100644
--- a/ship/SKILL.md
+++ b/ship/SKILL.md
@@ -33,8 +33,10 @@ _PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null
 _PROACTIVE_PROMPTED=$([ -f ~/.gstack/.proactive-prompted ] && echo "yes" || echo "no")
 _BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
 echo "BRANCH: $_BRANCH"
+_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "false")
 echo "PROACTIVE: $_PROACTIVE"
 echo "PROACTIVE_PROMPTED: $_PROACTIVE_PROMPTED"
+echo "SKILL_PREFIX: $_SKILL_PREFIX"
 source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
 REPO_MODE=${REPO_MODE:-unknown}
 echo "REPO_MODE: $REPO_MODE"
@@ -58,6 +60,11 @@ types (e.g., /qa, /ship). If you would have auto-invoked a skill, instead briefl
 "I think /skillname might help here — want me to run it?" and wait for confirmation.
 The user opted out of proactive behavior.
 
+If `SKILL_PREFIX` is `"true"`, the user has namespaced skill names. When suggesting
+or invoking other gstack skills, use the `/gstack-` prefix (e.g., `/gstack-qa` instead
+of `/qa`, `/gstack-ship` instead of `/ship`). Disk paths are unaffected — always use
+`~/.claude/skills/gstack/[skill-name]/SKILL.md` for reading skill files.
+
 If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
 
 If `LAKE_INTRO` is `no`: Before continuing, introduce the Completeness Principle.