Shell unavailable evidence (subagent)

Timestamp: 2026-09-26T03:20:06Z
Shell tool result for echo hi: "The shell command returned no exit status, so its result is unknown — do not assume it ran or succeeded."
Same for node -e "require('child_process').execSync('echo hi',{stdio:'inherit'})"
Same for /bin/sh -c '...' and redirect-to-file probe
Probe file write via Shell did NOT create target path (confirmed missing via Read)
Background Shell (block_until_ms: 0) DID surface failure in terminal file:
- path: /home/weichen/.cursor/projects/home-weichen-projects-Agent-System/terminals/152517.txt
- command: /usr/bin/env echo hi
- error: spawn /bin/bash ENOENT
- status: failed; elapsed_ms: 14
Read on /bin/bash, /usr/bin/bash, /bin/sh: host FS sees binaries ("Binary files without an extension are not supported by the read executor") — but Cursor Shell spawn cannot exec /bin/bash
WebFetch localhost health blocked: isolated server cannot fetch 127.0.0.1
No agentctl / pi-subagents / exec MCP namespaces available in this subagent catalog
Write tool works (this evidence file)
E2E NOT RUN — do not treat as PASS