diff --git a/packages/filegrc/src/cli.js b/packages/filegrc/src/cli.js
index cc98dbe..50f8045 100644
--- a/packages/filegrc/src/cli.js
+++ b/packages/filegrc/src/cli.js
@@ -1082,7 +1082,9 @@ export async function runCli(argv = process.argv.slice(2)) {
       record: mutation.record,
       programId: flags.program || mutation.record.programId,
       content: mutation.content,
-      expectedRevision: expectedRevision(flags, mutation, `obligation-occurrence/${mutation.record.supersedesId || mutation.record.id}`)
+      expectedRevision: existing || mutation.record.supersedesId
+        ? expectedRevision(flags, mutation, `obligation-occurrence/${mutation.record.supersedesId || mutation.record.id}`)
+        : undefined
     }));
     if (flags.json) console.log(JSON.stringify(result, null, 2));
     else console.log(`${existing ? "Updated" : "Created"} obligation-occurrence/${mutation.record.id}`);
diff --git a/packages/filegrc/src/mutation.js b/packages/filegrc/src/mutation.js
index 10902de..16a317a 100644
--- a/packages/filegrc/src/mutation.js
+++ b/packages/filegrc/src/mutation.js
@@ -41,7 +41,7 @@ export function normalizeResourceMutation(value, options = {}) {
   if (value.content !== undefined && (Array.isArray(value.content) || typeof value.content !== "object" || value.content === null)) {
     throw new Error("Mutation content must be an object keyed by Markdown slot.");
   }
-  if (value.revision !== undefined && typeof value.revision !== "string") {
+  if (value.revision != null && typeof value.revision !== "string") {
     throw new Error("Mutation revision must be a string.");
   }
   if (options.requireRevision && (typeof value.revision !== "string" || value.revision.length === 0)) {
@@ -56,7 +56,7 @@ export function normalizeResourceMutation(value, options = {}) {
   return {
     record: value.record,
     content: value.content,
-    revision: value.revision,
+    revision: value.revision ?? undefined,
     contentRevisions: value.contentRevisions,
     completionContext: value.completionContext
   };
diff --git a/packages/filegrc/test/completion-reconciliation.test.js b/packages/filegrc/test/completion-reconciliation.test.js
index 1006823..3507a5c 100644
--- a/packages/filegrc/test/completion-reconciliation.test.js
+++ b/packages/filegrc/test/completion-reconciliation.test.js
@@ -298,3 +298,35 @@ test("completion preserves exclusions and the authoritative expected-member coun
   assert.equal(result.linked.members.find(({ resourceId }) => resourceId === "asset-example").disposition, "not-applicable");
   assert.equal(result.linked.reviewedByIds, undefined);
 });
+
+test("CLI reconciliation consumes create, update, and supersession scaffolds with revision protection", async (context) => {
+  const f = await fixture(context);
+  const proof = join(f.root, "data", "control-activities", `${f.record.id}.json`);
+  await writeJson(proof, f.record);
+  const args = [new URL("../bin/filegrc.js", import.meta.url).pathname];
+  const cli = async (...command) => executeCli(runCli, process.execPath, [...args, ...command, "--root", f.root, "--json"]);
+  const payload = join(f.root, "reconciliation.json");
+  const scaffold = JSON.parse((await cli("reconcile-obligation", f.obligation.id, "--scaffold", "--window-start", "2026-07-05", "--as-of", "2026-07-07")).stdout);
+  assert.equal(scaffold.operation, "create");
+  assert.equal(scaffold.revision, null);
+  await writeJson(payload, scaffold);
+  await cli("reconcile-obligation", f.obligation.id, payload);
+  const update = JSON.parse((await cli("reconcile-obligation", f.obligation.id, "--scaffold", "--window-start", "2026-07-05")).stdout);
+  assert.equal(update.operation, "update");
+  assert.equal(typeof update.revision, "string");
+  await writeJson(payload, { ...update, revision: null });
+  await assert.rejects(cli("reconcile-obligation", f.obligation.id, payload), /revision.*required/);
+  await writeJson(payload, { ...update, revision: "stale" });
+  await assert.rejects(cli("reconcile-obligation", f.obligation.id, payload), /changed/);
+  update.record = { ...update.record, status: "reconciled", conclusion: "complete", reviewedByIds: ["person-example"], reconciledAt: "2026-07-07T16:30:00Z" };
+  await writeJson(payload, update);
+  await cli("reconcile-obligation", f.obligation.id, payload);
+  const correction = JSON.parse((await cli("reconcile-obligation", f.obligation.id, "--scaffold", "--window-start", "2026-07-05", "--correct-finalized")).stdout);
+  assert.equal(correction.operation, "supersede");
+  await writeJson(payload, { ...correction, revision: null });
+  await assert.rejects(cli("reconcile-obligation", f.obligation.id, payload), /revision.*required/);
+  await writeJson(payload, { ...correction, revision: "stale" });
+  await assert.rejects(cli("reconcile-obligation", f.obligation.id, payload), /changed/);
+  await writeJson(payload, correction);
+  await cli("reconcile-obligation", f.obligation.id, payload);
+});
diff --git a/packages/filegrc/test/mutation.test.js b/packages/filegrc/test/mutation.test.js
new file mode 100644
index 0000000..8c7cca2
--- /dev/null
+++ b/packages/filegrc/test/mutation.test.js
@@ -0,0 +1,16 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import { normalizeResourceMutation } from "../src/mutation.js";
+
+test("new resource mutations accept absent or null revisions without weakening updates", () => {
+  const record = { id: "example", type: "risk" };
+  for (const revision of [undefined, null]) {
+    assert.equal(normalizeResourceMutation({ record, revision }).revision, undefined);
+    assert.throws(() => normalizeResourceMutation({ record, revision }, { requireRevision: true }), /revision is required/);
+  }
+  for (const revision of [false, 1, {}, []]) {
+    assert.throws(() => normalizeResourceMutation({ record, revision }), /revision must be a string/);
+  }
+  assert.throws(() => normalizeResourceMutation({ record, revision: "" }, { requireRevision: true }), /revision is required/);
+  assert.equal(normalizeResourceMutation({ record, revision: "current" }, { requireRevision: true }).revision, "current");
+});