Add exitCode alias for code property

[konard]

Summary

• Added an exitCode alias for the code property across both the JavaScript and Rust implementations (issue Add exitCode alias for code #36).
• Merged the latest main (monorepo restructure: src/ → js/src/, tests/ → js/tests/) into the branch and re-applied the change to the new modular layout.
• Maintains full backward compatibility — the existing code property is unchanged.

Implementation Details

JavaScript (js/)

• createResult (js/src/$.result.mjs) now includes exitCode: code.
• finish() (js/src/$.process-runner-base.mjs) — the single choke point every result passes through before being returned to the user — normalizes exitCode from code, so every execution path (simple commands, pipelines, virtual commands, sequences) exposes the alias without patching dozens of literal result objects.

Rust (rust/)

• Added CommandResult::exit_code() accessor (rust/src/utils.rs) as the idiomatic alias for the code field, mirroring the JS exitCode alias.

Docs & release

• Documented the alias in js/README.md and rust/README.md.
• Added a changeset (js/.changeset/exitcode-alias.md, minor) and a Rust changelog fragment (rust/changelog.d/..., minor).

Test plan

• js/tests/exitcode-alias.test.mjs — covers basic alias, matching values, success/failure, and pipeline scenarios (5 tests pass).
• rust/tests/utils.rs::test_command_result_exit_code_alias — verifies exit_code() matches code for success and failure (passes).
• Core JS suites ($.test.mjs, pipe.test.mjs) pass with no regressions.
• Language parity check passes (both js/src/** and rust/src/** changed).

🤖 Generated with Claude Code

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Resolves #36

[konard]

Get latest changes from default branch, and ensure everything is applied to both JavaScript and Rust.

[konard]

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[konard]

Working session summary

Everything is complete. Here's a summary of the work done on PR #112 for issue #36:

Summary

The PR comment asked to "Get latest changes from default branch, and ensure everything is applied to both JavaScript and Rust." The merge status was DIRTY because main had restructured the repo into a monorepo (src/ → js/src/, tests/ → js/tests/) and split the old monolithic src/$.mjs into modular files.

What I did

1. Merged main into the branch and resolved conflicts:

   • The old src/$.mjs (which my original change targeted) was deleted in main — removed it.
   • Moved the test to the new js/tests/ location.

2. Re-applied the exitCode alias to the new JavaScript layout:

   • js/src/$.result.mjs — createResult now includes exitCode: code.
   • js/src/$.process-runner-base.mjs — added normalization in finish(), the single choke point every result passes through before being returned to the user. This covers all execution paths (simple commands, pipelines, virtual commands, sequences) cleanly instead of patching dozens of literal result objects.

3. Added Rust parity (the new requirement):

   • rust/src/utils.rs — added CommandResult::exit_code() accessor as the idiomatic alias for the code field.

4. Tests, docs, and release fragments:

   • JS test (js/tests/exitcode-alias.test.mjs, 5 tests) + Rust test (test_command_result_exit_code_alias).
   • Documented the alias in both js/README.md and rust/README.md.
   • Added a changeset (minor) and a Rust changelog fragment (minor).

Verification

• All three CI workflows pass: Language parity check, JavaScript checks, Rust checks (lint/format + tests on Ubuntu/macOS/Windows).
• Locally verified: JS tests pass, Rust tests pass, cargo fmt --check clean, the parity script passes (both js/src/** and rust/src/** changed), prettier/eslint/jscpd clean.
• PR is ready for review, merge state CLEAN, working tree clean.

PR: #112

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[konard]

🤖 Solution Draft Log

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[konard]

✅ Ready to merge

This pull request is now ready to be merged:

• All CI checks have passed
• No merge conflicts
• No pending changes

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