Claude Unavailable: probe returns empty output on Claude CLI v2.1.37 #97
Description
Bug
ClaudeBar v0.4.24+ shows "Claude Unavailable — Failed to parse output: Could not find session usage" with Claude CLI v2.1.37.
Environment
- ClaudeBar: v0.4.24 (also tested v0.4.26)
- Claude CLI: v2.1.37
- macOS: Darwin 25.2.0
Logs
The first probe attempt hits the folder trust prompt (expected). After ClaudeBar writes trust and retries, the second probe returns only terminal control codes with zero visible content:
[2026-02-09T16:22:54.603Z] [INFO] [probes] Starting Claude probe with /usage command...
[2026-02-09T16:22:58.708Z] [INFO] [probes] Claude /usage output:
[?2004h][?1004h][?25l][<u[?1004l][?2004l][?25h]]9;4;0;[?25h][?1004l][?2004l][?2004h][?1004h][?25l][<u[?1004l][?2004l][?25h]]9;4;0;[?25h][?1004l][?2004l]
[2026-02-09T16:22:58.709Z] [WARNING] [probes] Could not determine account tier, defaulting to Max
[2026-02-09T16:22:58.709Z] [ERROR] [probes] Claude parse failed: could not find 'Current session' percentage in output
The output is just terminal mode enable/disable sequences ([?2004h, [?1004h, [?25l, etc.) with no actual usage text between them. The SwiftTerm renderer produces empty/blank text from this.
Root Cause
It appears Claude CLI v2.1.37 changed how /usage renders — possibly using a fullscreen TUI mode that doesn't emit plain text output the way earlier versions did. The probe's approach of capturing stdout and rendering via SwiftTerm no longer captures the actual usage data.
Expected
ClaudeBar should parse and display usage quota percentages as it does with earlier CLI versions.