diff --git a/graphify/always_on/agents-md.md b/graphify/always_on/agents-md.md
index 6511cd1dd..144d578f2 100644
--- a/graphify/always_on/agents-md.md
+++ b/graphify/always_on/agents-md.md
@@ -10,3 +10,4 @@ Rules:
 - If graphify-out/wiki/index.md exists, use it for broad navigation instead of raw source browsing.
 - Read graphify-out/GRAPH_REPORT.md only for broad architecture review or when query/path/explain do not surface enough context.
 - After modifying code, run `graphify update .` to keep the graph current (AST-only, no API cost).
+- A committed graphify-out/graph.json is rewritten whole on every build, so a large diff to it in a pull request is expected. Do not flag it as churn or suggest skipping the graph rebuild or its hooks.
diff --git a/graphify/always_on/claude-md.md b/graphify/always_on/claude-md.md
index 417efeb27..00a8858fd 100644
--- a/graphify/always_on/claude-md.md
+++ b/graphify/always_on/claude-md.md
@@ -7,3 +7,4 @@ Rules:
 - If graphify-out/wiki/index.md exists, use it for broad navigation instead of raw source browsing.
 - Read graphify-out/GRAPH_REPORT.md only for broad architecture review or when query/path/explain do not surface enough context.
 - After modifying code, run `graphify update .` to keep the graph current (AST-only, no API cost).
+- A committed graphify-out/graph.json is rewritten whole on every build, so a large diff to it in a pull request is expected. Do not flag it as churn or suggest skipping the graph rebuild or its hooks.
diff --git a/graphify/always_on/gemini-md.md b/graphify/always_on/gemini-md.md
index 417efeb27..00a8858fd 100644
--- a/graphify/always_on/gemini-md.md
+++ b/graphify/always_on/gemini-md.md
@@ -7,3 +7,4 @@ Rules:
 - If graphify-out/wiki/index.md exists, use it for broad navigation instead of raw source browsing.
 - Read graphify-out/GRAPH_REPORT.md only for broad architecture review or when query/path/explain do not surface enough context.
 - After modifying code, run `graphify update .` to keep the graph current (AST-only, no API cost).
+- A committed graphify-out/graph.json is rewritten whole on every build, so a large diff to it in a pull request is expected. Do not flag it as churn or suggest skipping the graph rebuild or its hooks.
diff --git a/tests/test_skillgen.py b/tests/test_skillgen.py
index 7284b397e..0a4c62c15 100644
--- a/tests/test_skillgen.py
+++ b/tests/test_skillgen.py
@@ -750,15 +750,17 @@ def test_always_on_roundtrip_is_byte_faithful():
         "When the user types `/graphify`, use the installed graphify skill or instructions "
         "before doing anything else."
     )
-    # The sanctioned-edit registry holds exactly this single old->new substitution.
+    # The registry holds exactly the #1530 substitution plus the graph-diff rule.
     assert gen.ALWAYS_ON_SANCTIONED_EDITS["_AGENTS_MD_SECTION"] == (
         (old_instruction, new_instruction),
+        gen._GRAPH_DIFF_EDIT,
     )
     baseline_agents = gen._always_on_constants(gen.ALWAYS_ON_BASELINE_REF)["_AGENTS_MD_SECTION"]
-    # The ONLY divergence from the frozen baseline is the sanctioned sentence —
+    # The ONLY divergences from the frozen baseline are the sanctioned edits —
     # any other byte drift would have surfaced as a problem above.
     assert old_instruction in baseline_agents
-    assert baseline_agents.replace(old_instruction, new_instruction) == rendered_agents
+    old_rule, new_rule = gen._GRAPH_DIFF_EDIT
+    assert baseline_agents.replace(old_instruction, new_instruction).replace(old_rule, new_rule) == rendered_agents
     assert "`skill` tool" not in rendered_agents
     assert 'skill: "graphify"' not in rendered_agents
 
diff --git a/tools/skillgen/expected/graphify__always_on__agents-md.md b/tools/skillgen/expected/graphify__always_on__agents-md.md
index 6511cd1dd..144d578f2 100644
--- a/tools/skillgen/expected/graphify__always_on__agents-md.md
+++ b/tools/skillgen/expected/graphify__always_on__agents-md.md
@@ -10,3 +10,4 @@ Rules:
 - If graphify-out/wiki/index.md exists, use it for broad navigation instead of raw source browsing.
 - Read graphify-out/GRAPH_REPORT.md only for broad architecture review or when query/path/explain do not surface enough context.
 - After modifying code, run `graphify update .` to keep the graph current (AST-only, no API cost).
+- A committed graphify-out/graph.json is rewritten whole on every build, so a large diff to it in a pull request is expected. Do not flag it as churn or suggest skipping the graph rebuild or its hooks.
diff --git a/tools/skillgen/expected/graphify__always_on__claude-md.md b/tools/skillgen/expected/graphify__always_on__claude-md.md
index 417efeb27..00a8858fd 100644
--- a/tools/skillgen/expected/graphify__always_on__claude-md.md
+++ b/tools/skillgen/expected/graphify__always_on__claude-md.md
@@ -7,3 +7,4 @@ Rules:
 - If graphify-out/wiki/index.md exists, use it for broad navigation instead of raw source browsing.
 - Read graphify-out/GRAPH_REPORT.md only for broad architecture review or when query/path/explain do not surface enough context.
 - After modifying code, run `graphify update .` to keep the graph current (AST-only, no API cost).
+- A committed graphify-out/graph.json is rewritten whole on every build, so a large diff to it in a pull request is expected. Do not flag it as churn or suggest skipping the graph rebuild or its hooks.
diff --git a/tools/skillgen/expected/graphify__always_on__gemini-md.md b/tools/skillgen/expected/graphify__always_on__gemini-md.md
index 417efeb27..00a8858fd 100644
--- a/tools/skillgen/expected/graphify__always_on__gemini-md.md
+++ b/tools/skillgen/expected/graphify__always_on__gemini-md.md
@@ -7,3 +7,4 @@ Rules:
 - If graphify-out/wiki/index.md exists, use it for broad navigation instead of raw source browsing.
 - Read graphify-out/GRAPH_REPORT.md only for broad architecture review or when query/path/explain do not surface enough context.
 - After modifying code, run `graphify update .` to keep the graph current (AST-only, no API cost).
+- A committed graphify-out/graph.json is rewritten whole on every build, so a large diff to it in a pull request is expected. Do not flag it as churn or suggest skipping the graph rebuild or its hooks.
diff --git a/tools/skillgen/fragments/always-on/agents-md.md b/tools/skillgen/fragments/always-on/agents-md.md
index 6511cd1dd..144d578f2 100644
--- a/tools/skillgen/fragments/always-on/agents-md.md
+++ b/tools/skillgen/fragments/always-on/agents-md.md
@@ -10,3 +10,4 @@ Rules:
 - If graphify-out/wiki/index.md exists, use it for broad navigation instead of raw source browsing.
 - Read graphify-out/GRAPH_REPORT.md only for broad architecture review or when query/path/explain do not surface enough context.
 - After modifying code, run `graphify update .` to keep the graph current (AST-only, no API cost).
+- A committed graphify-out/graph.json is rewritten whole on every build, so a large diff to it in a pull request is expected. Do not flag it as churn or suggest skipping the graph rebuild or its hooks.
diff --git a/tools/skillgen/fragments/always-on/claude-md.md b/tools/skillgen/fragments/always-on/claude-md.md
index 417efeb27..00a8858fd 100644
--- a/tools/skillgen/fragments/always-on/claude-md.md
+++ b/tools/skillgen/fragments/always-on/claude-md.md
@@ -7,3 +7,4 @@ Rules:
 - If graphify-out/wiki/index.md exists, use it for broad navigation instead of raw source browsing.
 - Read graphify-out/GRAPH_REPORT.md only for broad architecture review or when query/path/explain do not surface enough context.
 - After modifying code, run `graphify update .` to keep the graph current (AST-only, no API cost).
+- A committed graphify-out/graph.json is rewritten whole on every build, so a large diff to it in a pull request is expected. Do not flag it as churn or suggest skipping the graph rebuild or its hooks.
diff --git a/tools/skillgen/fragments/always-on/gemini-md.md b/tools/skillgen/fragments/always-on/gemini-md.md
index 417efeb27..00a8858fd 100644
--- a/tools/skillgen/fragments/always-on/gemini-md.md
+++ b/tools/skillgen/fragments/always-on/gemini-md.md
@@ -7,3 +7,4 @@ Rules:
 - If graphify-out/wiki/index.md exists, use it for broad navigation instead of raw source browsing.
 - Read graphify-out/GRAPH_REPORT.md only for broad architecture review or when query/path/explain do not surface enough context.
 - After modifying code, run `graphify update .` to keep the graph current (AST-only, no API cost).
+- A committed graphify-out/graph.json is rewritten whole on every build, so a large diff to it in a pull request is expected. Do not flag it as churn or suggest skipping the graph rebuild or its hooks.
diff --git a/tools/skillgen/gen.py b/tools/skillgen/gen.py
index d3fa13459..cb3695d53 100644
--- a/tools/skillgen/gen.py
+++ b/tools/skillgen/gen.py
@@ -99,6 +99,16 @@ ALWAYS_ON_BLOCKS = {
 # to the baseline before the byte-for-byte comparison; anything not covered here
 # still fails the guard, so unrelated drift cannot slip through. Each entry is a
 # one-time, audited edit to the otherwise-immutable v8 baseline.
+_UPDATE_RULE = "run `graphify update .` to keep the graph current (AST-only, no API cost)."
+# A committed graph.json is rewritten whole on every build, so reviewers kept
+# flagging its large PR diffs as churn and proposing to skip the rebuild hooks.
+_GRAPH_DIFF_EDIT = (
+    _UPDATE_RULE,
+    _UPDATE_RULE
+    + "\n- A committed graphify-out/graph.json is rewritten whole on every build, so a large diff"
+    " to it in a pull request is expected. Do not flag it as churn or suggest skipping the"
+    " graph rebuild or its hooks.",
+)
 ALWAYS_ON_SANCTIONED_EDITS: dict[str, tuple[tuple[str, str], ...]] = {
     # #1530: install guidance must stay host-generic — do not tell agents to
     # invoke a literal `skill` tool with `skill: "graphify"`, which is
@@ -110,7 +120,10 @@ ALWAYS_ON_SANCTIONED_EDITS: dict[str, tuple[tuple[str, str], ...]] = {
             "When the user types `/graphify`, use the installed graphify skill or instructions "
             "before doing anything else.",
         ),
+        _GRAPH_DIFF_EDIT,
     ),
+    "_CLAUDE_MD_SECTION": (_GRAPH_DIFF_EDIT,),
+    "_GEMINI_MD_SECTION": (_GRAPH_DIFF_EDIT,),
 }
 
 # The full six-value file_type enum (Decision A). Every rendered platform — split