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feat(claude): sync Claude Code session title to HAPI web UI #394

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feat(claude): sync Claude Code session title to HAPI web UI #394

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6 changes: 6 additions & 0 deletions cli/src/claude/claudeLocalLauncher.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,12 @@ export async function claudeLocalLauncher(session: Session): Promise<'switch' |
return
}
session.client.sendClaudeSessionMessage(message)
},
onTitleChange: (title) => {
session.client.updateMetadata((metadata) => ({
...metadata,
name: title
}))
}
});

Expand Down
36 changes: 27 additions & 9 deletions cli/src/claude/utils/sessionScanner.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -20,11 +20,13 @@ export async function createSessionScanner(opts: {
sessionId: string | null;
workingDirectory: string;
onMessage: (message: RawJSONLines) => void;
onTitleChange?: (title: string) => void;
}) {
const scanner = new ClaudeSessionScanner({
sessionId: opts.sessionId,
workingDirectory: opts.workingDirectory,
onMessage: opts.onMessage
onMessage: opts.onMessage,
onTitleChange: opts.onTitleChange
});

await scanner.start();
Expand All @@ -45,15 +47,17 @@ export type SessionScanner = ReturnType<typeof createSessionScanner>;
class ClaudeSessionScanner extends BaseSessionScanner<RawJSONLines> {
private readonly projectDir: string;
private readonly onMessage: (message: RawJSONLines) => void;
private readonly onTitleChange?: (title: string) => void;
private readonly finishedSessions = new Set<string>();
private readonly pendingSessions = new Set<string>();
private currentSessionId: string | null;
private readonly scannedSessions = new Set<string>();

constructor(opts: { sessionId: string | null; workingDirectory: string; onMessage: (message: RawJSONLines) => void }) {
constructor(opts: { sessionId: string | null; workingDirectory: string; onMessage: (message: RawJSONLines) => void; onTitleChange?: (title: string) => void }) {
super({ intervalMs: 3000 });
this.projectDir = getProjectPath(opts.workingDirectory);
this.onMessage = opts.onMessage;
this.onTitleChange = opts.onTitleChange;
this.currentSessionId = opts.sessionId;
}

Expand Down Expand Up @@ -83,7 +87,10 @@ class ClaudeSessionScanner extends BaseSessionScanner<RawJSONLines> {
return;
}
const sessionFile = this.sessionFilePath(this.currentSessionId);
const { events, totalLines } = await readSessionLog(sessionFile, 0);
const { events, titleChanges, totalLines } = await readSessionLog(sessionFile, 0);
if (titleChanges.length > 0) {
this.onTitleChange?.(titleChanges[titleChanges.length - 1]);
}
logger.debug(`[SESSION_SCANNER] Marking ${events.length} existing messages as processed from session ${this.currentSessionId}`);
const keys = events.map((entry) => messageKey(entry.event));
this.seedProcessedKeys(keys);
Expand Down Expand Up @@ -113,7 +120,11 @@ class ClaudeSessionScanner extends BaseSessionScanner<RawJSONLines> {
if (sessionId) {
this.scannedSessions.add(sessionId);
}
const { events, totalLines } = await readSessionLog(filePath, cursor);
const { events, titleChanges, totalLines } = await readSessionLog(filePath, cursor);
for (const title of titleChanges) {
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[MAJOR] This applies custom-title updates from every scanned file, not just the current Claude session. During /clear or resume, findSessionFiles() still includes pendingSessions, so a late rename in the previous JSONL file can overwrite metadata.name for the new active session.

Suggested fix:

const { events, titleChanges, totalLines } = await readSessionLog(filePath, cursor)
if (sessionId === this.currentSessionId) {
    for (const title of titleChanges) {
        logger.debug(`[SESSION_SCANNER] Title change: ${title}`)
        this.onTitleChange?.(title)
    }
}

logger.debug(`[SESSION_SCANNER] Title change: ${title}`);
this.onTitleChange?.(title);
}
return {
events,
nextCursor: totalLines
Expand Down Expand Up @@ -172,14 +183,14 @@ function messageKey(message: RawJSONLines): string {
* Read and parse session log file.
* Returns only valid conversation messages, silently skipping internal events.
*/
async function readSessionLog(filePath: string, startLine: number): Promise<{ events: SessionFileScanEntry<RawJSONLines>[]; totalLines: number }> {
async function readSessionLog(filePath: string, startLine: number): Promise<{ events: SessionFileScanEntry<RawJSONLines>[]; titleChanges: string[]; totalLines: number }> {
logger.debug(`[SESSION_SCANNER] Reading session file: ${filePath}`);
let file: string;
try {
file = await readFile(filePath, 'utf-8');
} catch (error) {
logger.debug(`[SESSION_SCANNER] Session file not found: ${filePath}`);
return { events: [], totalLines: startLine };
return { events: [], titleChanges: [], totalLines: startLine };
}
const lines = file.split('\n');
const hasTrailingEmpty = lines.length > 0 && lines[lines.length - 1] === '';
Expand All @@ -189,20 +200,27 @@ async function readSessionLog(filePath: string, startLine: number): Promise<{ ev
effectiveStartLine = 0;
}
const messages: SessionFileScanEntry<RawJSONLines>[] = [];
const titleChanges: string[] = [];
for (let index = effectiveStartLine; index < lines.length; index += 1) {
const l = lines[index];
try {
if (l.trim() === '') {
continue;
}
let message = JSON.parse(l);


// Capture custom-title events from Claude Code's /rename command
if (message.type === 'custom-title' && typeof message.customTitle === 'string') {
titleChanges.push(message.customTitle);
continue;
}

// Silently skip known internal Claude Code events
// These are state/tracking events, not conversation messages
if (message.type && INTERNAL_CLAUDE_EVENT_TYPES.has(message.type)) {
continue;
}

let parsed = RawJSONLinesSchema.safeParse(message);
if (!parsed.success) {
// Unknown message types are silently skipped.
Expand All @@ -214,7 +232,7 @@ async function readSessionLog(filePath: string, startLine: number): Promise<{ ev
continue;
}
}
return { events: messages, totalLines };
return { events: messages, titleChanges, totalLines };
}

function sessionIdFromPath(filePath: string): string | null {
Expand Down
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