Headless opencode run intermittently hangs at startup (log frozen at exactly 1,472 bytes, before any session/API activity) #36763

Description

opencode run sometimes freezes at startup before creating a session row or making any API call. Without --print-logs we observed it repeatedly (~12 launches; one prompt went 3-for-3). With --print-logs it is much rarer but not eliminated — five occurrences to date where the log froze right after init + cleanup prune=7.days: no session row, no spend, 2+ minutes of nothing.

Consistent signature across the three most recent occurrences:

• The frozen log is exactly 1,472 bytes.
• The cleanup prune=7.days line lands ~60 s after init before the freeze (healthy runs: <1 s gap) — looks like a timeout being hit.
• 4 of 5 occurred within minutes after a previous opencode process was killed (SIGTERM/pkill) — stale-state suspicion, though we found no lock files or leftover processes.

Kill and relaunch with the identical command clears it every time.

Expected: startup either proceeds or exits with an error. Suspected non-TTY output race or stale-state wait during init.

Not the same as #30337 (node_modules scanning) or #25668 (plugin loading, Windows) — this workspace has no .opencode/node_modules and no plugins. Possibly adjacent to #29395 (init deadlock), but here there is no concurrent instance running at launch time.

Workaround we use: always --print-logs; treat "no session row + no spend within ~60 s" as hung; kill and relaunch.

Plugins

None

OpenCode version

1.17.18

Steps to reproduce

Not deterministic. Shape: opencode run --print-logs --log-level INFO "<prompt>" > log 2>&1 in a fresh non-TTY shell, most reliably within a few minutes of killing a previous opencode process. Occasionally the log stops after the cleanup line at exactly 1,472 bytes.

Operating System

macOS (darwin 25.5.0), node v22.13.1

Terminal

Non-TTY (headless invocation)