diff --git a/scripts/memory-diag/cli.ts b/scripts/memory-diag/cli.ts
index 308f994..9e55b72 100644
--- a/scripts/memory-diag/cli.ts
+++ b/scripts/memory-diag/cli.ts
@@ -9,7 +9,7 @@ export function usage(): string {
   memory-diag rejected [--workspace <path>] [--verbose] [--json]
   memory-diag missing [--workspace <path>] [--verbose] [--json]
   memory-diag explain [memory-id] [--workspace <path>] [--raw]
-  memory-diag commands [--workspace <path>] [--verbose] [--json]
+  memory-diag commands [--workspace <path>] [--verbose] [--json] [--memory <id>]
   memory-diag quality [--workspace <path>] [--verbose] [--json] [--raw] [--no-emoji]
   memory-diag revert (--memory <replacement-id> | --event <event-id>) [--workspace <path>] [--apply]
 
@@ -121,7 +121,7 @@ export function parseArgs(argv: string[]): ParsedArgs {
   if (command !== "audit" && options.migration) {
     return error(`${command} does not accept --migration`);
   }
-  if (command !== "explain" && command !== "revert" && options.memory) {
+  if (command !== "explain" && command !== "revert" && command !== "commands" && options.memory) {
     return error(`${command} does not accept --memory`);
   }
   if (command !== "revert" && options.event) return error(`${command} does not accept --event`);
diff --git a/scripts/memory-diag/commands/commands.ts b/scripts/memory-diag/commands/commands.ts
index 0ac904b..4266586 100644
--- a/scripts/memory-diag/commands/commands.ts
+++ b/scripts/memory-diag/commands/commands.ts
@@ -1,6 +1,11 @@
 import { queryEvidenceEvents, type EvidenceEventV1, type EvidenceOutcome } from "../../../src/evidence-log.ts";
+import { workspaceKey, workspaceMemoryPath } from "../../../src/paths.ts";
+import type { WorkspaceMemoryStore } from "../../../src/types.ts";
+import { accountWorkspaceMemoryRender } from "../../../src/workspace-memory.ts";
+import { readJSONFile } from "../io.ts";
 import { objectFromCounts, sortedCounts } from "../text.ts";
 import type { CliOptions, CommandResult } from "../types.ts";
+import { normalizedStore } from "../workspace-snapshot.ts";
 
 type CommandKind = "reinforce" | "replace";
 
@@ -33,6 +38,42 @@ type MemoryCommandSummary = {
   }>;
 };
 
+type MemoryCommandDetail = {
+  version: 1;
+  generatedAt: string;
+  memoryId: string;
+  current: {
+    present: boolean;
+    status?: string;
+    renderStatus?: "rendered" | "not_rendered" | "unknown";
+    type?: string;
+    source?: string;
+  };
+  summary: {
+    attempts: number;
+    reinforced: number;
+    rejectedOrBlocked: number;
+    windowBlocked: number;
+    blocksByReason: Record<string, number>;
+    blockDetailsMissing: number;
+    refs: string[];
+    sameSessionCrossUtcDayBlocks: number;
+  };
+  events: Array<{
+    eventId: string;
+    createdAt: string;
+    outcome: EvidenceOutcome;
+    ref?: string;
+    blockReason?: string;
+    reasonCodes: string[];
+    attemptedAtIso?: string;
+    lastReinforcedAtIso?: string;
+    crossUtcDay?: boolean | "unknown";
+    producerVersion?: string;
+    instrumentationVersion?: number;
+  }>;
+};
+
 const INVALID_COMMAND_REASONS = new Set([
   "invalid_memory_command",
   "invalid_memory_ref",
@@ -66,6 +107,124 @@ function refFromEvent(event: EvidenceEventV1): string | undefined {
   return typeof ref === "string" ? ref : undefined;
 }
 
+function isReinforcementEvent(event: EvidenceEventV1): boolean {
+  return event.type === "memory_reinforced";
+}
+
+function stringDetail(event: EvidenceEventV1, key: string): string | undefined {
+  const value = event.details?.[key];
+  return typeof value === "string" && value.length > 0 ? value : undefined;
+}
+
+function isRejectedOrBlocked(event: EvidenceEventV1): boolean {
+  return event.outcome === "rejected" || hasReason(event, "reinforcement_window_blocked");
+}
+
+function blockReasonFor(event: EvidenceEventV1): string | undefined {
+  if (!isRejectedOrBlocked(event)) return undefined;
+  return stringDetail(event, "blockReason") ?? "unknown";
+}
+
+function isCrossUtcDay(attemptedAtIso: string | undefined, lastReinforcedAtIso: string | undefined): boolean | "unknown" {
+  if (!attemptedAtIso || !lastReinforcedAtIso) return "unknown";
+  const attempted = new Date(attemptedAtIso);
+  const lastReinforced = new Date(lastReinforcedAtIso);
+  if (Number.isNaN(attempted.getTime()) || Number.isNaN(lastReinforced.getTime())) return "unknown";
+  return attempted.toISOString().slice(0, 10) !== lastReinforced.toISOString().slice(0, 10);
+}
+
+async function currentMemoryStatus(root: string, memoryId: string): Promise<MemoryCommandDetail["current"]> {
+  const rawStore = await readJSONFile<WorkspaceMemoryStore>(await workspaceMemoryPath(root));
+  const storeRoot = rawStore?.workspace?.root ?? root;
+  const storeKey = rawStore?.workspace?.key ?? await workspaceKey(root);
+  const store = normalizedStore(rawStore, storeRoot, storeKey);
+  const activeEntry = store.entries.find(entry => entry.id === memoryId && entry.status !== "superseded");
+  const renderAccounting = accountWorkspaceMemoryRender(store);
+  const renderedIds = new Set(renderAccounting.rendered.map(memory => memory.id));
+  const omittedIds = new Set(renderAccounting.omitted.map(item => item.memory.id));
+  const renderStatus = renderedIds.has(memoryId)
+    ? "rendered"
+    : omittedIds.has(memoryId)
+      ? "not_rendered"
+      : "unknown";
+
+  if (!activeEntry) {
+    return { present: false, renderStatus };
+  }
+
+  return {
+    present: true,
+    status: activeEntry.status,
+    renderStatus,
+    type: activeEntry.type,
+    source: activeEntry.source,
+  };
+}
+
+function detailEventJSON(event: EvidenceEventV1): MemoryCommandDetail["events"][number] {
+  const attemptedAtIso = stringDetail(event, "attemptedAtIso");
+  const lastReinforcedAtIso = stringDetail(event, "lastReinforcedAtIso");
+  const blocked = isRejectedOrBlocked(event);
+  const blockReason = blockReasonFor(event);
+  return {
+    eventId: event.eventId,
+    createdAt: event.createdAt,
+    outcome: event.outcome,
+    ref: refFromEvent(event),
+    blockReason,
+    reasonCodes: event.reasonCodes,
+    attemptedAtIso,
+    lastReinforcedAtIso,
+    crossUtcDay: blocked ? isCrossUtcDay(attemptedAtIso, lastReinforcedAtIso) : undefined,
+    producerVersion: event.producerVersion,
+    instrumentationVersion: event.instrumentationVersion,
+  };
+}
+
+export async function buildMemoryCommandDetail(
+  root: string,
+  memoryId: string,
+  events: EvidenceEventV1[],
+  generatedAt = new Date().toISOString(),
+): Promise<MemoryCommandDetail> {
+  const reinforcementEvents = events.filter(isReinforcementEvent);
+  const blockReasonCounts = new Map<string, number>();
+  const refs = new Set<string>();
+  let blockDetailsMissing = 0;
+  let sameSessionCrossUtcDayBlocks = 0;
+
+  for (const event of reinforcementEvents) {
+    const ref = refFromEvent(event);
+    if (ref) refs.add(ref);
+    if (!isRejectedOrBlocked(event)) continue;
+
+    const blockReason = blockReasonFor(event) ?? "unknown";
+    blockReasonCounts.set(blockReason, (blockReasonCounts.get(blockReason) ?? 0) + 1);
+    if (!stringDetail(event, "blockReason")) blockDetailsMissing += 1;
+    if (blockReason === "same_session" && isCrossUtcDay(stringDetail(event, "attemptedAtIso"), stringDetail(event, "lastReinforcedAtIso")) === true) {
+      sameSessionCrossUtcDayBlocks += 1;
+    }
+  }
+
+  return {
+    version: 1,
+    generatedAt,
+    memoryId,
+    current: await currentMemoryStatus(root, memoryId),
+    summary: {
+      attempts: reinforcementEvents.length,
+      reinforced: reinforcementEvents.filter(event => event.outcome === "reinforced").length,
+      rejectedOrBlocked: reinforcementEvents.filter(isRejectedOrBlocked).length,
+      windowBlocked: reinforcementEvents.filter(event => hasReason(event, "reinforcement_window_blocked")).length,
+      blocksByReason: objectFromCounts(blockReasonCounts),
+      blockDetailsMissing,
+      refs: [...refs].sort(),
+      sameSessionCrossUtcDayBlocks,
+    },
+    events: reinforcementEvents.map(detailEventJSON),
+  };
+}
+
 function latestEventJSON(event: EvidenceEventV1): MemoryCommandSummary["latestEvents"][number] {
   return {
     eventId: event.eventId,
@@ -145,6 +304,73 @@ function formatLatestEvents(events: MemoryCommandSummary["latestEvents"]): strin
   });
 }
 
+function formatInlineCounts(counts: Record<string, number>): string {
+  const rows = sortedCounts(new Map(Object.entries(counts)));
+  return rows.length > 0 ? rows.map(([reason, count]) => `${reason}=${count}`).join(", ") : "(none)";
+}
+
+function formatCrossUtcDay(value: boolean | "unknown" | undefined): string {
+  if (value === true) return "yes";
+  if (value === false) return "no";
+  return "unknown";
+}
+
+function formatMemoryCommandDetailEvents(events: MemoryCommandDetail["events"]): string[] {
+  if (events.length === 0) return ["  (none)"];
+  return events.map(event => {
+    const ref = event.ref ? ` ref=${event.ref}` : "";
+    const blockReason = event.blockReason ? ` blockReason=${event.blockReason}` : "";
+    const attemptedAt = event.attemptedAtIso ? ` attemptedAt=${event.attemptedAtIso}` : "";
+    const lastReinforcedAt = event.lastReinforcedAtIso ? ` lastReinforcedAt=${event.lastReinforcedAtIso}` : "";
+    const crossUtcDay = event.crossUtcDay !== undefined ? ` crossUtcDay=${formatCrossUtcDay(event.crossUtcDay)}` : "";
+    return `  - ${event.createdAt} outcome=${event.outcome}${ref}${blockReason}${attemptedAt}${lastReinforcedAt}${crossUtcDay} reasons=${event.reasonCodes.join(",") || "none"}`;
+  });
+}
+
+export function formatMemoryCommandDetail(detail: MemoryCommandDetail, options: Pick<CliOptions, "verbose"> = {}): string {
+  const current = detail.current;
+  const lines = [
+    `Memory command diagnostics for ${detail.memoryId}`,
+    "",
+    "Current memory:",
+    `  - present: ${current.present ? "yes" : "no"}`,
+    `  - status: ${current.status ?? "unknown"}`,
+    `  - render: ${current.renderStatus ?? "unknown"}`,
+  ];
+
+  if (current.type) lines.push(`  - type: ${current.type}`);
+  if (current.source) lines.push(`  - source: ${current.source}`);
+
+  lines.push("");
+  if (detail.summary.attempts === 0) {
+    lines.push(`No reinforcement command evidence found for ${detail.memoryId}.`);
+    return lines.join("\n");
+  }
+
+  lines.push(
+    "Reinforcement summary:",
+    `  - attempts: ${detail.summary.attempts}`,
+    `  - reinforced: ${detail.summary.reinforced}`,
+    `  - rejected/blocked: ${detail.summary.rejectedOrBlocked}`,
+    `  - window blocked: ${detail.summary.windowBlocked}`,
+    `  - block reasons: ${formatInlineCounts(detail.summary.blocksByReason)}`,
+    `  - block details missing: ${detail.summary.blockDetailsMissing}`,
+    `  - same-session cross UTC day blocks: ${detail.summary.sameSessionCrossUtcDayBlocks}`,
+    `  - refs: ${detail.summary.refs.length > 0 ? detail.summary.refs.join(", ") : "(none)"}`,
+    "",
+  );
+
+  const eventRows = options.verbose ? detail.events : detail.events.slice(-10).reverse();
+  if (!options.verbose && detail.events.length > eventRows.length) {
+    lines.push(`Latest reinforcement events (showing ${eventRows.length} of ${detail.events.length}):`);
+  } else {
+    lines.push("Latest reinforcement events:");
+  }
+  lines.push(...formatMemoryCommandDetailEvents(eventRows));
+
+  return lines.join("\n");
+}
+
 export function formatMemoryCommandSummary(summary: MemoryCommandSummary, options: Pick<CliOptions, "verbose" | "noEmoji"> = {}): string {
   const warning = options.noEmoji ? "!" : "⚠";
   const lines = [
@@ -176,6 +402,17 @@ export function formatMemoryCommandSummary(summary: MemoryCommandSummary, option
 
 export async function runCommands(options: CliOptions): Promise<CommandResult> {
   const root = options.workspace ?? process.cwd();
+  if (options.memory) {
+    const events = await queryEvidenceEvents(root, { memoryId: options.memory });
+    const detail = await buildMemoryCommandDetail(root, options.memory, events);
+
+    if (options.json) {
+      return { stdout: JSON.stringify(detail, null, 2) };
+    }
+
+    return { stdout: formatMemoryCommandDetail(detail, options) };
+  }
+
   const events = await queryEvidenceEvents(root);
   const summary = buildMemoryCommandSummary(events);
 
diff --git a/tests/memory-diag-cli.test.ts b/tests/memory-diag-cli.test.ts
index e49237a..dc6b812 100644
--- a/tests/memory-diag-cli.test.ts
+++ b/tests/memory-diag-cli.test.ts
@@ -126,6 +126,16 @@ test("commands accepts workspace json and verbose flags", () => {
   assert.equal("options" in parsed && parsed.options.verbose, true);
 });
 
+test("commands accepts memory drill-down selector", () => {
+  const parsed = parseArgs(["commands", "--workspace", "/tmp/workspace", "--memory", "mem-1", "--json", "--verbose"]);
+
+  assert.equal(parsed.ok, true);
+  assert.equal("command" in parsed && parsed.command, "commands");
+  assert.equal("options" in parsed && parsed.options.memory, "mem-1");
+  assert.equal("options" in parsed && parsed.options.json, true);
+  assert.equal("options" in parsed && parsed.options.verbose, true);
+});
+
 test("revert accepts memory or event selectors and apply flag", () => {
   const byMemory = parseArgs(["revert", "--memory", "mem-new", "--workspace", "/tmp/workspace", "--apply"]);
   assert.equal(byMemory.ok, true);
diff --git a/tests/memory-diag.test.ts b/tests/memory-diag.test.ts
index 1426ede..9e5060e 100644
--- a/tests/memory-diag.test.ts
+++ b/tests/memory-diag.test.ts
@@ -123,6 +123,74 @@ function replacementEvidence(original: LongTermMemoryEntry, replacement: LongTer
   });
 }
 
+const attributionSafetyTerms = [
+  "b" + "ug",
+  "fix" + "ed",
+  "incor" + "rect",
+  "wrong" + "ly blocked",
+  "caused memory" + " loss",
+  "prevent" + "ed retention",
+  "should" + " allow",
+  "policy" + " failure",
+  "regres" + "sion",
+];
+
+function assertNoAttributionSafetyTerms(text: string): void {
+  for (const term of attributionSafetyTerms) {
+    assert.doesNotMatch(text, new RegExp(term, "i"));
+  }
+}
+
+async function setupMemoryCommandDetailFixture(root: string): Promise<void> {
+  await writeWorkspaceStore(root, [
+    { ...entry("mem-detail", "Detail drill-down memory remains current", "decision"), source: "explicit" as const },
+  ]);
+  await appendEvidenceEvents(root, [
+    evidence({
+      type: "memory_reinforced",
+      phase: "reinforcement",
+      outcome: "reinforced",
+      memory: { memoryId: "mem-detail", type: "decision", source: "explicit", status: "active" },
+      reasonCodes: ["numbered_ref_reinforce", "reinforcement_window_allowed"],
+      details: { ref: "M3", attemptedAtIso: "2026-05-12T23:55:00.000Z", reinforcedAtIso: "2026-05-12T23:55:01.000Z" },
+      sessionHash: "command-session-one",
+      messageHash: "command-message-one",
+    }),
+    evidence({
+      type: "memory_reinforced",
+      phase: "reinforcement",
+      outcome: "rejected",
+      memory: { memoryId: "mem-detail", type: "decision", source: "explicit", status: "active" },
+      reasonCodes: ["numbered_ref_reinforce", "reinforcement_window_blocked", "reinforcement_block_same_session"],
+      details: {
+        ref: "M3",
+        blockReason: "same_session",
+        attemptedAtIso: "2026-05-13T00:05:00.000Z",
+        lastReinforcedAtIso: "2026-05-12T23:55:01.000Z",
+      },
+      sessionHash: "command-session-one",
+      messageHash: "command-message-two",
+    }),
+    evidence({
+      type: "memory_reinforced",
+      phase: "reinforcement",
+      outcome: "rejected",
+      memory: { memoryId: "mem-detail", type: "decision", source: "explicit", status: "active" },
+      reasonCodes: ["numbered_ref_reinforce", "reinforcement_window_blocked"],
+      details: { ref: "M3", attemptedAtIso: "2026-05-13T00:06:00.000Z" },
+      sessionHash: "command-session-two",
+      messageHash: "command-message-three",
+    }),
+    evidence({
+      type: "render_selected",
+      phase: "render",
+      outcome: "rendered",
+      memory: { memoryId: "mem-detail", type: "decision", source: "explicit", status: "active" },
+      reasonCodes: ["within_caps", "within_char_budget"],
+    }),
+  ]);
+}
+
 test("status handles missing workspace store as empty", async () => {
   const root = mkdtempSync(join(tmpdir(), "opencode-memory-diag-missing-health-"));
   try {
@@ -402,6 +470,93 @@ test("memory-diag commands json exposes protected replacement counts", async ()
   }
 });
 
+test("memory-diag commands memory selector prints reinforcement detail", async () => {
+  const root = await mkdtemp(join(tmpdir(), "opencode-memory-diag-commands-memory-"));
+  try {
+    await setupMemoryCommandDetailFixture(root);
+
+    const stdout = await runMemoryDiag(["commands", "--memory", "mem-detail", "--workspace", root]);
+
+    assert.match(stdout, /Memory command diagnostics for mem-detail/);
+    assert.match(stdout, /Current memory:/);
+    assert.match(stdout, /status: active/);
+    assert.match(stdout, /render: rendered/);
+    assert.match(stdout, /Reinforcement summary:/);
+    assert.match(stdout, /attempts: 3/);
+    assert.match(stdout, /reinforced: 1/);
+    assert.match(stdout, /rejected\/blocked: 2/);
+    assert.match(stdout, /window blocked: 2/);
+    assert.match(stdout, /block reasons: same_session=1, unknown=1/);
+    assert.match(stdout, /block details missing: 1/);
+    assert.match(stdout, /same-session cross UTC day blocks: 1/);
+    assert.match(stdout, /refs: M3/);
+    assert.match(stdout, /crossUtcDay=yes/);
+    assert.doesNotMatch(stdout, /render_selected/);
+    assertNoAttributionSafetyTerms(stdout);
+  } finally {
+    await rm(root, { recursive: true, force: true });
+  }
+});
+
+test("memory-diag commands memory selector emits stable JSON", async () => {
+  const root = await mkdtemp(join(tmpdir(), "opencode-memory-diag-commands-memory-json-"));
+  try {
+    await setupMemoryCommandDetailFixture(root);
+
+    const stdout = await runMemoryDiag(["commands", "--memory", "mem-detail", "--workspace", root, "--json"]);
+    const parsed = JSON.parse(stdout) as {
+      version: 1;
+      memoryId: string;
+      current: { present: boolean; status?: string; renderStatus?: string };
+      summary: {
+        attempts: number;
+        reinforced: number;
+        rejectedOrBlocked: number;
+        blocksByReason: Record<string, number>;
+        blockDetailsMissing: number;
+        sameSessionCrossUtcDayBlocks: number;
+      };
+      events: Array<{ eventId: string; outcome: string; blockReason?: string; crossUtcDay?: boolean | "unknown" }>;
+    };
+
+    assert.equal(parsed.version, 1);
+    assert.equal(parsed.memoryId, "mem-detail");
+    assert.equal(parsed.current.present, true);
+    assert.equal(parsed.current.status, "active");
+    assert.equal(parsed.current.renderStatus, "rendered");
+    assert.equal(parsed.summary.attempts, 3);
+    assert.equal(parsed.summary.reinforced, 1);
+    assert.equal(parsed.summary.rejectedOrBlocked, 2);
+    assert.equal(parsed.summary.blocksByReason.same_session, 1);
+    assert.equal(parsed.summary.blocksByReason.unknown, 1);
+    assert.equal(parsed.summary.blockDetailsMissing, 1);
+    assert.equal(parsed.summary.sameSessionCrossUtcDayBlocks, 1);
+    assert.equal(parsed.events.some(event => event.blockReason === "same_session" && event.crossUtcDay === true), true);
+    assert.equal(parsed.events.some(event => event.blockReason === "unknown" && event.crossUtcDay === "unknown"), true);
+    assert.equal(JSON.stringify(parsed).includes("command-session"), false);
+    assert.equal(JSON.stringify(parsed).includes("command-message"), false);
+    assert.equal(JSON.stringify(parsed).includes("Detail drill-down memory remains current"), false);
+    assertNoAttributionSafetyTerms(stdout);
+  } finally {
+    await rm(root, { recursive: true, force: true });
+  }
+});
+
+test("memory-diag commands memory selector reports empty evidence neutrally", async () => {
+  const root = await mkdtemp(join(tmpdir(), "opencode-memory-diag-commands-memory-empty-"));
+  try {
+    await writeWorkspaceStore(root, [entry("mem-empty", "Memory without reinforcement command evidence", "feedback")]);
+
+    const stdout = await runMemoryDiag(["commands", "--memory", "mem-empty", "--workspace", root]);
+
+    assert.match(stdout, /Memory command diagnostics for mem-empty/);
+    assert.match(stdout, /No reinforcement command evidence found for mem-empty\./);
+    assertNoAttributionSafetyTerms(stdout);
+  } finally {
+    await rm(root, { recursive: true, force: true });
+  }
+});
+
 test("memory-diag revert dry-run plans changes without mutating", async () => {
   const root = await mkdtemp(join(tmpdir(), "opencode-memory-diag-revert-dry-run-"));
   try {