Merging this PR will degrade performance by 23.15%

❌ 2 regressed benchmarks
✅ 15 untouched benchmarks
⏩ 2 skipped benchmarks¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

_{Comparing FarhanAliRaza:app-module-code-vardata (03be1ef) with main (a84e29b)}

Greptile Summary

This PR adds a module_code: tuple[str, ...] field to VarData, allowing Vars to contribute top-of-file JS helpers/constants to the page module. Collection is wired into both the DefaultCollectorPlugin tree-walker path and the legacy _get_all_custom_code recursion used by the memo-compile pipeline, with deduplication via dict.fromkeys / setdefault throughout.

• Two integration-test routes (/multi, /hook) are navigated via frontend_url + \"multi\" / frontend_url + \"hook\" without a leading slash or .removesuffix(\"/\"), producing malformed URLs when frontend_url has no trailing slash — the same pattern every other integration test in this repo avoids with .removesuffix(\"/\").

Confidence Score: 4/5

Core implementation is correct and well-tested; the only defect is in the new integration test's URL construction, which would cause two of the three new playwright tests to navigate to wrong addresses.

The module_code field, its merge logic, and all three collection paths are implemented correctly. The integration test for /multi and /hook routes concatenates frontend_url directly with the path segment without a leading slash or .removesuffix('/'), so those tests would navigate to malformed URLs and fail to validate the behavior they were written to cover.

tests/integration/tests_playwright/test_var_module_code.py — both routed test functions need the URL construction fixed before the integration tests can be relied on.

Important Files Changed

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["VarData\nmodule_code field"] -->|merge / dedup| B["VarData.merge"]
    B --> C["Var._get_all_var_data"]
    C --> D["Component._iter_var_module_code"]
    D --> E["Legacy path\n_get_all_custom_code"]
    D --> F["Plugin path\n_collect_var_module_code"]
    D --> G["Memo path\n_root_only_custom_code"]
    E --> H["Page module_code dict"]
    F --> H
    G --> H

_{Reviews (1): Last reviewed commit: "feat: propagate VarData.module_code into..." | Re-trigger Greptile}