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refactor: streamline input validation and error handling in hooks

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This commit is contained in:
Alex Newman
2025-10-16 20:10:51 -04:00
parent 7c5e5b1941
commit 6f62a569df
4 changed files with 84 additions and 249 deletions
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src/hooks/context.ts
+11 -65
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@@ -15,54 +15,21 @@ export interface SessionStartInput {
* Shows user what happened in recent sessions
*/
export function contextHook(input?: SessionStartInput): void {
if (!input) {
throw new Error('contextHook requires input');
}
const project = input.cwd ? path.basename(input.cwd) : path.basename(path.dirname(input.transcript_path));
const db = new HooksDatabase();
try {
// Log hook invocation
console.error('[claude-mem context] Hook fired with input:', JSON.stringify({
session_id: input?.session_id,
transcript_path: input?.transcript_path,
hook_event_name: input?.hook_event_name,
source: input?.source,
has_input: !!input
}));
// Handle standalone execution (no input provided)
if (!input) {
console.error('[claude-mem context] No input provided - exiting (standalone mode)');
console.log('No input provided - this script is designed to run as a Claude Code SessionStart hook');
process.exit(0);
}
// Extract project from cwd (same as new-hook to ensure consistency)
// If cwd is not available, fall back to extracting from transcript_path
const project = input.cwd ? path.basename(input.cwd) : path.basename(path.dirname(input.transcript_path));
console.error('[claude-mem context] Extracted project name:', project, 'from', input.cwd ? 'cwd' : 'transcript_path');
// Get recent summaries
console.error('[claude-mem context] Querying database for recent summaries...');
const db = new HooksDatabase();
const summaries = db.getRecentSummaries(project, 5);
db.close();
console.error('[claude-mem context] Database query complete - found', summaries.length, 'summaries');
// Log preview of each summary found
if (summaries.length > 0) {
console.error('[claude-mem context] Summary previews:');
summaries.forEach((summary, idx) => {
const preview = summary.request?.substring(0, 100) || summary.completed?.substring(0, 100) || '(no content)';
console.error(` [${idx + 1}]`, preview + (preview.length >= 100 ? '...' : ''));
});
}
// If no summaries, provide helpful message
if (summaries.length === 0) {
console.error('[claude-mem context] No summaries found - outputting empty context message');
console.log('# Recent Session Context\n\nNo previous sessions found for this project yet.');
process.exit(0);
return;
}
// Format output for Claude
console.error('[claude-mem context] Building markdown context from summaries...');
const output: string[] = [];
output.push('# Recent Session Context');
output.push('');
@@ -90,7 +57,6 @@ export function contextHook(input?: SessionStartInput): void {
output.push(`**Next Steps:** ${summary.next_steps}`);
}
// Show files that were read during the session
if (summary.files_read) {
try {
const files = JSON.parse(summary.files_read);
@@ -98,14 +64,12 @@ export function contextHook(input?: SessionStartInput): void {
output.push(`**Files Read:** ${files.join(', ')}`);
}
} catch {
// Backwards compatibility: if not valid JSON, show as text
if (summary.files_read.trim()) {
output.push(`**Files Read:** ${summary.files_read}`);
}
}
}
// Show files that were edited/written during the session
if (summary.files_edited) {
try {
const files = JSON.parse(summary.files_edited);
@@ -113,7 +77,6 @@ export function contextHook(input?: SessionStartInput): void {
output.push(`**Files Edited:** ${files.join(', ')}`);
}
} catch {
// Backwards compatibility: if not valid JSON, show as text
if (summary.files_edited.trim()) {
output.push(`**Files Edited:** ${summary.files_edited}`);
}
@@ -124,25 +87,8 @@ export function contextHook(input?: SessionStartInput): void {
output.push('');
}
// Log details about the markdown output
const markdownOutput = output.join('\n');
console.error('[claude-mem context] Markdown built successfully');
console.error('[claude-mem context] Output length:', markdownOutput.length, 'characters,', output.length, 'lines');
console.error('[claude-mem context] Output preview (first 200 chars):', markdownOutput.substring(0, 200) + '...');
console.error('[claude-mem context] Outputting context to stdout for Claude Code injection');
// Output to stdout for Claude Code to inject
console.log(markdownOutput);
console.error('[claude-mem context] Context hook completed successfully');
process.exit(0);
} catch (error: any) {
// On error, exit silently - don't block Claude Code
console.error('[claude-mem context] ERROR occurred during context hook execution');
console.error('[claude-mem context] Error message:', error.message);
console.error('[claude-mem context] Error stack:', error.stack);
console.error('[claude-mem context] Exiting gracefully to avoid blocking Claude Code');
process.exit(0);
console.log(output.join('\n'));
} finally {
db.close();
}
}