fix: summarize single daily exchanges

CHANGELOG.md

@@ -11,6 +11,7 @@
 
 ### Fixed
 
+- Generate daily summaries for days containing a complete single exchange.
 - Prevent mixed reaction replies from narrating the bot's internal choice to react while preserving natural reaction-plus-text responses.
 - Run Discord-initiated Claude login in a pseudo-terminal so the CLI accepts submitted OAuth codes.
 - Isolate saved history and summaries by Discord channel ID in dedicated storage namespaces so same-named channels do not share automatic context.

src/storage/summaries.ts

@@ -65,7 +65,7 @@ export async function generateDailySummary(
     summariesInProgress.add(summaryPath);
     try {
         const log = fs.readFileSync(logPath, "utf-8").trim();
-        if (!log || log.split("\n").length < 3) {
+        if (!log || log.split("\n").length < 2) {
             fs.writeFileSync(summaryPath, log, "utf-8");
             return;
         }

tests/summaryWorkload.test.mjs

@@ -44,3 +44,26 @@ test("daily summaries declare the daily-summary workload", async () => {
         "A useful summary",
     );
 });
+
+test("daily summaries include a single user-and-bot exchange", async () => {
+    const date = new Date("2026-08-02T12:00:00Z");
+    const logPath = getDailyLogPath("channel-2", date, "general");
+    fs.writeFileSync(logPath, "user: question\nbot: answer\n", "utf8");
+
+    let capturedLog;
+    await generateDailySummary(
+        "channel-2",
+        "general",
+        date,
+        async (_args, input) => {
+            capturedLog = input;
+            return { stdout: "A single-exchange summary", stderr: "" };
+        },
+    );
+
+    assert.equal(capturedLog, "user: question\nbot: answer");
+    assert.equal(
+        fs.readFileSync(getSummaryPath("channel-2", date, "general"), "utf8"),
+        "A single-exchange summary",
+    );
+});