Function writeSessionJSONL

scripts/test-cost-tracker.js:61–87

* Write a fake session JSONL with the given token counts and timestamps. * The session-tokens adapter reads from: * HOME/.claude/projects/{slug}/{sessionId}.jsonl * * slug is derived from CLAUDE_PROJECT_DIR = sandbox/project

(sandbox, sessionId, { outputTokens, durationMinutes })

 * slug is derived from CLAUDE_PROJECT_DIR = sandbox/project
 */
function writeSessionJSONL(sandbox, sessionId, { outputTokens, durationMinutes }) {
  const slug = projectSlug(path.join(sandbox, 'project'));
  const sessionsDir = path.join(sandbox, 'home', '.claude', 'projects', slug);
  const now = Date.now();
  const firstTs = new Date(now - durationMinutes * 60 * 1000).toISOString();
  const lastTs  = new Date(now).toISOString();

  // Two message entries: first at session start, last at session end
  const entry1 = JSON.stringify({
    timestamp: firstTs,
    message: {
      model: 'claude-sonnet-4-6',
      usage: { input_tokens: 500, output_tokens: 0,
               cache_creation_input_tokens: 0, cache_read_input_tokens: 0 },
    },
  });
  const entry2 = JSON.stringify({
    timestamp: lastTs,
    message: {
      model: 'claude-sonnet-4-6',
      usage: { input_tokens: 0, output_tokens: outputTokens,
               cache_creation_input_tokens: 0, cache_read_input_tokens: 0 },
    },
  });

  fs.writeFileSync(path.join(sessionsDir, `${sessionId}.jsonl`), entry1 + '\n' + entry2 + '\n');
}

function runCostTracker(sandbox, sessionId, stateOverride) {
  const stateFile = path.join(sandbox, 'project', '.planning', 'telemetry', 'cost-tracker-state.json');