diff --git a/src/resources/extensions/sf/self-feedback.js b/src/resources/extensions/sf/self-feedback.js
index 6ff18f29c..524d359fe 100644
--- a/src/resources/extensions/sf/self-feedback.js
+++ b/src/resources/extensions/sf/self-feedback.js
@@ -405,17 +405,53 @@ export function getBlockedEntries(basePath = process.cwd()) {
 		(e) => e.blocking && !e.resolvedAt,
 	);
 }
+/**
+ * Accepted resolution evidence kinds. Anything outside this set is rejected
+ * at the writer layer (sf-mp4qoby4-meiir7): the credibility check at the
+ * READER side (self-feedback-drain.js) was previously the only gate, and an
+ * agent that wrote DB rows directly via raw SQL or the wrong tool could
+ * bypass it, landing resolutions like `{file, line}` or `null` that the
+ * reader would then either trust (legacy carve-out) or quietly re-open. The
+ * writer-layer check makes the policy belt-and-suspenders for any caller
+ * going through markResolved or resolveSelfFeedbackEntry. Raw SQL bypass is
+ * a known limit documented in the entry; full coverage needs a DB CHECK
+ * constraint (schema migration, separate work).
+ */
+const ACCEPTED_EVIDENCE_KINDS = new Set([
+	"agent-fix",
+	"human-clear",
+	"promoted-to-requirement",
+	"auto-version-bump",
+	// "agent-fix-unverified" is reserved for outcomes-verification (a future
+	// follow-up): if a caller wants to mark a resolution as agent-attributed
+	// but explicitly NOT verified, it should write this kind so the
+	// credibility check re-opens the entry until verification lands.
+	"agent-fix-unverified",
+]);
+
+function isAcceptedEvidence(evidence) {
+	if (!evidence || typeof evidence !== "object" || Array.isArray(evidence))
+		return false;
+	const kind = evidence.kind;
+	return typeof kind === "string" && ACCEPTED_EVIDENCE_KINDS.has(kind);
+}
+
 /**
  * Mark an entry as resolved. Updates SQLite for forge-local feedback when
  * available, otherwise rewrites the legacy JSONL fallback in place. Entries are
  * append-only otherwise; resolution is the one mutation we support so blocking
  * entries don't trigger re-queue forever.
  *
- * Resolution requires structured `evidence` so the fix is traceable:
+ * Resolution requires structured `evidence` with one of the accepted kinds
+ * (sf-mp4qoby4-meiir7 — writer-layer constraint):
  *  - `agent-fix` should cite a commit SHA or test path
  *  - `auto-version-bump` is for session_start's automatic resolver
  *  - `human-clear` is the catch-all for operator interventions
  *  - `promoted-to-requirement` is for the threshold-promotion sweeper
+ *  - `agent-fix-unverified` for outcomes-verification-pending resolutions
+ *
+ * Resolutions without an accepted evidence kind are REJECTED (return false)
+ * — no DB write, no JSONL write, no markdown regeneration.
  *
  * If the entry has `acceptanceCriteria`, callers SHOULD pass `criteriaMet`
  * naming which criteria were satisfied. (Not enforced — entries without
@@ -424,6 +460,11 @@ export function getBlockedEntries(basePath = process.cwd()) {
  * After resolution, SELF-FEEDBACK.md is regenerated as a compact working view.
  */
 export function markResolved(entryId, resolution, basePath = process.cwd()) {
+	if (!isAcceptedEvidence(resolution?.evidence)) {
+		// Writer-layer constraint: refuse non-canonical resolutions. The
+		// caller can recover by re-submitting with a valid evidence kind.
+		return false;
+	}
 	if (isForgeRepo(basePath) && isDbAvailable()) {
 		try {
 			importLegacyJsonlToDb(basePath);
diff --git a/src/resources/extensions/sf/tests/self-feedback-db.test.mjs b/src/resources/extensions/sf/tests/self-feedback-db.test.mjs
index 974c83c83..85aa25f86 100644
--- a/src/resources/extensions/sf/tests/self-feedback-db.test.mjs
+++ b/src/resources/extensions/sf/tests/self-feedback-db.test.mjs
@@ -140,6 +140,73 @@ test("markResolved_when_db_available_updates_sqlite_and_markdown_projection", ()
 	assert.match(markdown, /Recently Resolved/);
 });
 
+test("markResolved_rejects_resolution_with_non_canonical_evidence_kind", () => {
+	const project = makeForgeProject();
+	const result = recordSelfFeedback(
+		{
+			kind: "writer-layer-test",
+			severity: "medium",
+			summary: "Must be rejected when evidence kind is non-canonical",
+		},
+		project,
+	);
+	assert.ok(result?.entry.id);
+
+	// Non-canonical shape — exactly what the dogfood agent wrote (sf-mp4qoby4-meiir7)
+	const okBadKind = markResolved(
+		result.entry.id,
+		{
+			reason: "claims a fix",
+			evidence: { file: "src/foo.js", line: 42 },
+		},
+		project,
+	);
+	assert.equal(okBadKind, false);
+
+	// Missing evidence entirely
+	const okMissing = markResolved(
+		result.entry.id,
+		{ reason: "no evidence" },
+		project,
+	);
+	assert.equal(okMissing, false);
+
+	// Evidence kind not in the allowed set
+	const okWrongKind = markResolved(
+		result.entry.id,
+		{ reason: "unknown kind", evidence: { kind: "spontaneous-resolution" } },
+		project,
+	);
+	assert.equal(okWrongKind, false);
+
+	// All three rejections must have left the entry OPEN
+	const [entry] = readAllSelfFeedback(project);
+	assert.equal(entry.resolvedAt, undefined);
+});
+
+test("markResolved_accepts_each_canonical_evidence_kind", () => {
+	const project = makeForgeProject();
+	const kinds = [
+		{ kind: "agent-fix", commitSha: "abc1234" },
+		{ kind: "human-clear" },
+		{ kind: "promoted-to-requirement", requirementId: "R042" },
+		{ kind: "auto-version-bump" },
+		{ kind: "agent-fix-unverified", reasonForUnverified: "no test yet" },
+	];
+	for (const evidence of kinds) {
+		const filed = recordSelfFeedback(
+			{ kind: `accepts-${evidence.kind}`, severity: "low", summary: "x" },
+			project,
+		);
+		const ok = markResolved(
+			filed.entry.id,
+			{ reason: `using ${evidence.kind}`, evidence },
+			project,
+		);
+		assert.equal(ok, true, `expected ${evidence.kind} to be accepted`);
+	}
+});
+
 test("markResolved_appends_resolution_event_to_jsonl_audit_log", () => {
 	const project = makeForgeProject();
 	const result = recordSelfFeedback(