fix(advanced): warm the code interpreter before its first eval deadline (0.16 line) - #1102
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radu-mocanu merged 2 commits intoSep 21, 2026
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🔵 Needs a closer look
Startup initialization failures should be wrapped before approval.
Pull request overview
Pre-warms QuickJS WebAssembly modules before the first advanced-agent evaluation to prevent cold-start deadline failures.
Changes:
- Added cached interpreter warm-up and import-time preload support.
- Added warm-up and preload tests.
- Bumped the package version to 0.16.22.
File summaries
| File | Summary |
|---|---|
uv.lock |
Synchronizes the locked package version. |
tests/agent/advanced/test_code_interpreter.py |
Tests warm-up and preload behavior. |
src/uipath_langchain/agent/advanced/code_interpreter.py |
Implements cached WASM warm-up. Moderate finding (1 vote): wrap startup initialization failures as structured AgentStartupErrors. |
src/uipath_langchain/agent/advanced/code_interpreter_preload.py |
Provides import-time preloading. |
src/uipath_langchain/agent/advanced/__init__.py |
Exports the warm-up function. |
pyproject.toml |
Updates the package version. |
Review details
Suppressed comments (1)
src/uipath_langchain/agent/advanced/code_interpreter.py:257
- Because this now runs during agent/graph startup, a missing or corrupt
_transform.wasmcan maketransform_sourceraise a raw third-partyTransformError/RuntimeError(andRuntimecan likewise raiseQuickJSError). The agent startup paths use structuredAgentStartupErrors; please catch and chain these initialization failures so a low-level dependency exception does not escape to the host.
transform_source(
"warmup.js", "const x = 1;", flags=SourceTransform.TOP_LEVEL_CONST_TO_VAR
)
- Files reviewed: 5/6 changed files
- Comments generated: 0
- Review effort level: Lite
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quickjs_rs compiles its source transform WebAssembly module lazily, inside the first eval of the process, under the same per-call deadline as user code. On a CPU-starved instance the compile alone outlasts the deadline, so the first advanced run on a fresh process fails at its first model call with "interrupted" and a retry on the same process succeeds. Compile it when the graph is built instead, and expose the warm-up so a host that preloads modules at process start can run it earlier. Claude-Session: https://claude.ai/code/session_013CLJG6q56YoHrgNTgm3pA3 (cherry picked from commit 8fd0a1c)
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dianagrecu-uipath
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Sep 21, 2026
radu-mocanu
merged commit Sep 21, 2026
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Summary
warm_code_interpreter()so a host that preloads modules at process start can run the compile earlierWhy
quickjs_rs compiles its source transform module lazily inside the first eval, under the same 5 s deadline as user code. On a CPU-starved instance the compile alone exceeds the deadline, so the first advanced run on a fresh process fails at its first model call with
interrupted, and a retry on the same process succeeds. Cherry-pick of #1101, released as 0.16.22.