🤖 fix: build dist/ before running terminal-bench #513
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PR #507 added `dist/` to the terminal-bench archive include paths to fix worker crashes. However, the workflow wasn't building `dist/` before running the benchmark, causing all tasks to fail immediately with: ``` Error running agent for task <name>: Required file /home/runner/work/cmux/cmux/dist missing ``` Now runs `make build` before `make benchmark-terminal` to ensure dist/ exists and contains the compiled worker files. Verified with workflow run #19140594821 which successfully completed the modernize-fortran-build task.
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ammario
approved these changes
Nov 6, 2025
The 'should not hang on commands that read stdin' test was flaky in CI: - Local: took 5073ms when expecting <5000ms (73ms over) - SSH: took 8645ms when expecting <8000ms (645ms over) Increased timeouts to provide headroom for CI runner variability: - Local: 5000ms → 6000ms (+20%) - SSH: 8000ms → 10000ms (+25%) These timeouts verify the command completes quickly (not hanging until the bash tool's 180s timeout), while accounting for CI slowness.
CI continues to show high variability: - runtimeExecuteBash local: 5073ms → 7079ms (trending up) - runtimeExecuteBash SSH: 8645ms (within new limits) - initWorkspace SSH: 12127ms when expecting <10000ms Increased timeouts to be more generous: - Local runtime: 6000ms → 10000ms (+67%) - SSH runtime: 10000ms → 15000ms (+50%) - Init queue check: 10000ms → 15000ms (+50%) These tests verify operations complete quickly (not hanging until the bash tool's 180s timeout). The large headroom accounts for CI slowness while still catching actual hangs.
This was referenced Nov 7, 2025
ammario
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Nov 7, 2025
## Problem Terminal-bench was failing with all tasks showing 0 input/output tokens because the agent was exiting immediately after receiving the user message, without making any API calls. **Symptoms:** - Latest nightly runs (Nov 5-7): All 80 tasks failed with `agent_timeout` - Agent ran for only ~45 seconds then exited - `total_input_tokens: 0`, `total_output_tokens: 0` - Stream started with `caught-up` and `user` message, but no `stream-delta` or `stream-end` events **Root cause:** The `agentSessionCli.ts` reads the user message from stdin via a pipe: ```bash printf '%s' "$instruction" | bun src/debug/agentSessionCli.ts ... ``` Once stdin reaches EOF and is consumed, Bun detects no other active handles keeping the event loop alive and exits the process, **even though async work (API streaming) is still pending**. ## Solution Add an explicit keepalive interval that ensures the process stays alive until `main()` completes. The interval runs far into the future (1000 seconds) but gets cleared in the finally block once the agent session finishes. ## Testing **Before fix:** - Run #19173435224: 1 task, 0 tokens, ~2 min total (agent ran 45s) - Agent exited immediately after user message **After fix:** - Run #19173548174: 1 task, **resolved: true**, ~7 min total (agent ran 3m17s) - 22 tool calls made - Stream-delta events present - Agent completed successfully ## Related - Fixes nightly terminal-bench failures from Nov 5-7 - Related to PR #507 (dist/ in archive) and PR #513 (build step in workflow) _Generated with `cmux`_
ibetitsmike
pushed a commit
that referenced
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Nov 7, 2025
## Problem Terminal-bench was failing with all tasks showing 0 input/output tokens because the agent was exiting immediately after receiving the user message, without making any API calls. **Symptoms:** - Latest nightly runs (Nov 5-7): All 80 tasks failed with `agent_timeout` - Agent ran for only ~45 seconds then exited - `total_input_tokens: 0`, `total_output_tokens: 0` - Stream started with `caught-up` and `user` message, but no `stream-delta` or `stream-end` events **Root cause:** The `agentSessionCli.ts` reads the user message from stdin via a pipe: ```bash printf '%s' "$instruction" | bun src/debug/agentSessionCli.ts ... ``` Once stdin reaches EOF and is consumed, Bun detects no other active handles keeping the event loop alive and exits the process, **even though async work (API streaming) is still pending**. ## Solution Add an explicit keepalive interval that ensures the process stays alive until `main()` completes. The interval runs far into the future (1000 seconds) but gets cleared in the finally block once the agent session finishes. ## Testing **Before fix:** - Run #19173435224: 1 task, 0 tokens, ~2 min total (agent ran 45s) - Agent exited immediately after user message **After fix:** - Run #19173548174: 1 task, **resolved: true**, ~7 min total (agent ran 3m17s) - 22 tool calls made - Stream-delta events present - Agent completed successfully ## Related - Fixes nightly terminal-bench failures from Nov 5-7 - Related to PR #507 (dist/ in archive) and PR #513 (build step in workflow) _Generated with `cmux`_
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Problem
PR #507 added
dist/to the terminal-bench archive include paths to fix worker crashes. However, the workflow wasn't buildingdist/before running the benchmark, causing all tasks to fail immediately with:Solution
Add
make buildstep beforemake benchmark-terminalin the workflow. This ensures:dist/directory existsTesting
Verified with workflow run #19140594821 which successfully completed the modernize-fortran-build task:
Generated with
cmux