[Shreesh-Sree]

Problem / Motivation

Native error paths reported different categories for the same rac_result_t, and Electron could lose native operation context and structured error details on the utility-process path. Closes #880, #1122, and #1123; completes the commons follow-up to #779.

Root Cause & Solution

• Commons now uses the complete canonical 18-range mapping, with UNSPECIFIED for unmapped and nonnegative results. One declarative commons manifest also generates Python's numeric fallback; Python and Kotlin RAG no longer maintain separate authored range tables.
• Electron attaches native sdkError payloads, captures RAG status before freeing buffers, and skips attaching a success payload on the error path. It retains contextual and generic messages, preserves authoritative wire categories (including UNSPECIFIED), and retains serialized details through the actual native-wrapper → utility RPC → caller sequence.
• Kotlin RAG reuses SDKException.fromRACResult, including its native-serialization fallback. Python retains raw ABI codes, unknown wire categories, lazy/native-free imports, and explicit I/O factory categorization.
• Signed-minimum native codes are widened before negation; their original ABI value is retained even when the positive magnitude cannot fit the proto enum.
• Public mapper documentation is corrected. Upstream main is merged, and unrelated README, release-guidance, and streaming-documentation changes are removed from this PR's diff.

Benchmarks & Measurements

No inference-performance claim: this changes failure handling. Python and shared TypeScript categories agree for all 4,001 inputs from -2000 through 2000. Regression coverage checks both signs for every value in each canonical category range, plus gaps, unknown wire categories, contextual messages, raw unmapped ABI codes, and structured RPC metadata.

Testing & Verification

• Python: PYTHONPATH=.:/tmp/ra960-metadata /tmp/ra960-venv/bin/python -m pytest tests -q in bindings/python: 497 passed, 23 skipped. Metadata was generated with the project's PEP 517 backend; skips require native binaries/models.
• Electron (bindings/electron): npm run build, npm run typecheck, npm test: 242 passed, 0 failed on the prior follow-up; the latest focused error suite passes 21 tests with the -12345 regression. Message-loss, category-fallback, and converted-error RPC regressions were observed failing before their fixes.
• Web (bindings/web): npm run typecheck -w packages/core and focused SDKException regression: passed.
• React Native (bindings/react-native): @runanywhere/core typecheck and SDKException suite: passed, 17 tests. Full workspace install postinstall could not complete because the host lacks the required CFPropertyList Ruby gem.
• Electron native addon C++ changes were not compiled locally; CI/native build remains the verification path for that change.
• Kotlin (bindings/kotlin): JAVA_HOME=/tmp/ra960-jdk/Contents/Home ./gradlew ktlintCheck --console=plain: BUILD SUCCESSFUL. testDebugUnitTest is blocked by the host's missing Android SDK.
• Python sdist: built with the project backend and inspected to confirm the generated category helper ships. Build-backend freshness checks include the new shared manifest.
• Core: cmake --build build/pr960 --target test_result_to_proto_error test_proto_buffer test_sdk_event_stream test_core -j "$(sysctl -n hw.logicalcpu)"; focused error executable: 1,451 checks, 0 failures. ctest --test-dir build/pr960 -R '^(result_to_proto_error_tests|proto_buffer_tests|sdk_event_stream_tests|core_tests)$' --output-on-failure: 4/4 passed. Native configuration enables protobuf/tests and disables engine backends, ONNX runtime, platform backend, and Solutions.
• git diff --check: passed. Targeted formatting for the serializer and core error test passes. The repository-wide C++ format script reports existing issues in 78 files; unrelated formatting is unchanged.

Safety & Backwards Compatibility

No IDL values, wire fields, or public method signatures change. Python's existing category_for_code import remains available via its generated implementation without requiring native loading or a protobuf runtime. Existing raw ABI codes and explicit category overrides are retained. Electron's serialized payload property is additive; legacy numeric/string errors continue to work.

Summary by CodeRabbit

• Bug Fixes
  • Error categories are now mapped consistently across SDKs, including clearer handling of unmapped codes.
  • Structured SDK error details and messages are preserved when errors pass through Electron RPC.
  • Extreme error-code values, including INT32_MIN, are handled safely and retain their signed code information.
• Documentation
  • Updated error reference material to reflect the shared category ranges and handling of unmapped codes.

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Walkthrough

The changes define shared RAC error-category ranges, use them in native and SDK binding conversions, and add overflow-safe handling for INT32_MIN. Electron now carries serialized SDK error details through native errors and RPC.

Changes: SDK error category consistency

Layer / File(s)	Summary
Canonical category mapping core/include/rac/core/rac_error_categories.def, core/src/foundation/rac_proto_adapters.cpp, core/src/core/rac_error_proto.cpp, core/include/rac/core/rac_error_proto.h, core/include/rac/foundation/rac_proto_adapters.h, core/tests/test_result_to_proto_error.cpp	Core category conversion uses the shared ranges. Error serialization uses 64-bit magnitude handling and maps magnitudes above INT32_MAX to ERROR_CODE_UNKNOWN. Tests check category boundaries, unknown codes, and preservation of signed ABI codes.
Binding category adoption idl/codegen/generate_python_errors.py, bindings/python/_build/ra_build_backend.py, bindings/python/runanywhere/errors.py, bindings/python/tests/test_errors.py, bindings/python/docs/reference/*, bindings/proto-ts/src/convenience/errors_category.ts, bindings/kotlin/.../CppBridgeRAG.kt	The Python generator reads category ranges from the shared manifest, and Python uses the generated mapper. Python exception factories assign categories explicitly, and Kotlin RAG conversion delegates to SDKException.fromRACResult. Tests and documentation reflect these mappings.
Electron structured error transport bindings/electron/native/addon.cpp, bindings/electron/src/errors.ts, bindings/electron/src/process/rpc.ts, bindings/electron/src/process/dispatch.ts, bindings/electron/test/unit/*	The native addon attaches serialized SDK error bytes when conversion succeeds. Electron exceptions retain and decode the bytes, and dispatch includes them in RPC error payloads. Tests cover structured fields and message handling.

Priority: Normal

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Bug fix · Severity of issue fixed: Medium

Sequence Diagram(s)

sequenceDiagram
  participant NativeAddon
  participant make_rac_error
  participant rpcError
  participant RpcErrorPayload
  participant asSDKException
  NativeAddon->>make_rac_error: Create error with serialized sdkError bytes
  make_rac_error->>rpcError: Preserve sdkError bytes
  rpcError->>RpcErrorPayload: Include sdkError when it is a Uint8Array
  RpcErrorPayload->>asSDKException: Pass bytes and contextual message

Loading

Suggested reviewers: siddhesh2377

Merge Risk: Low · previous review acc6b

Electron error details can lose original wire data during transport. The change remains mergeable with owner awareness, though preserving the native bytes is worth fixing.

Pre-merge checks: 4

Check name	Status	Explanation
Title check		The title clearly and concisely describes the main change: unifying native error category mapping.
Linked Issues check		[#880] The Commons mapper now reads the shared 18-range manifest and returns UNSPECIFIED for nonnegative and unmapped values. Python generates category_for_code from that manifest instead of carry…
Out of Scope Changes check		The reviewed changes support [#880]. They update the shared category manifest, Commons mapping, Python and Kotlin adapters, Electron native and RPC error transport, related documentation, generation f…
Description check		The description follows the template's main ideas. It has Problem/Motivation, Root Cause & Solution, Benchmarks & Measurements, Testing & Verification, and Safety & Backwards Compatibility sections, a…

Full details: Linked Issues check

Explanation

[#880] The Commons mapper now reads the shared 18-range manifest and returns UNSPECIFIED for nonnegative and unmapped values. Python generates category_for_code from that manifest instead of carrying a local range table. Kotlin RAG delegates to SDKException.fromRACResult. Electron now carries serialized sdkError data across both native paths and utility-process RPC. Tests cover range boundaries, unknown values, serialized details, and native status handling.

Full details: Out of Scope Changes check

Explanation

The reviewed changes support [#880]. They update the shared category manifest, Commons mapping, Python and Kotlin adapters, Electron native and RPC error transport, related documentation, generation freshness, and regression tests. The supplied change summary does not identify unrelated README, release-guidance, or streaming-documentation changes in the current pull request.

Full details: Description check

Explanation

The description follows the template's main ideas. It has Problem/Motivation, Root Cause & Solution, Benchmarks & Measurements, Testing & Verification, and Safety & Backwards Compatibility sections, and it lists tests run per SDK. It does not use the template's headings. It omits the "Type of Change" checklist, the "Labels" section, the platform-specific testing checkboxes, the "Checklist" section, and the "Screenshots" section. It also does not state whether the Lint and self-review checkboxes were completed, and it does not say whether documentation was updated, though the diff touches documentation files. The description also says Electron native addon C++ changes were not compiled locally. The reviewer comments on the contextual-message guard in errors.ts and the ktlint import-ordering failure in CppBridgeRAG.kt have no reported resolution, and the description does not address them. Because the core content is complete, the check passes, but the template items above should be added.

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⚠️ Outside diff range comments (1)

🟡 Minor · Pass ErrorCategory.IO from storage_error. · errors.py:171-178

bindings/python/runanywhere/errors.py:171-178
🎯 Functional Correctness | 🟡 Minor | ⚡ Quick win

Pass ErrorCategory.IO from storage_error.

storage_error() creates ErrorCode.STORAGE_ERROR for local file and download I/O failures, but it omits the category. The constructor now maps omitted categories to ErrorCategory.UNSPECIFIED, so these callers lose the I/O category. Add category=ErrorCategory.IO to this factory.

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In `@bindings/python/runanywhere/errors.py` around lines 171 - 178, Update the
storage_error factory to pass ErrorCategory.IO when creating SDKException via
SDKException.of, while preserving its existing error code, detail selection, and
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Inline comments:
In `@core/src/foundation/rac_proto_adapters.cpp`:
- Line 1118: Update the header comment for rac_result_to_proto_category to
document that negative codes outside the canonical ranges map to
ERROR_CATEGORY_INTERNAL, matching the implementation’s public contract. Leave
the mapper behavior unchanged.

---

Outside diff comments:
In `@bindings/python/runanywhere/errors.py`:
- Around line 171-178: Update the storage_error factory to pass ErrorCategory.IO
when creating SDKException via SDKException.of, while preserving its existing
error code, detail selection, and nested cause handling.

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bindings/python/tests/test_errors.py (1)

56-63: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick win

Add boundary and missing-range cases for category_for_code.

This test checks only interior values. It does not assert the NETWORK range (150–179) or the AUTH range (320–349). Add parametrized first- and last-value cases for every canonical Python range, plus the existing zero and out-of-range cases. The C++ and TypeScript tests call independent implementations and cannot detect a Python-only regression.

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In `@bindings/python/tests/test_errors.py` around lines 56 - 63, Add parametrized
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every canonical Python error range, including NETWORK (150–179) and AUTH
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In `@bindings/python/tests/test_errors.py`:
- Around line 56-63: Add parametrized boundary coverage for category_for_code,
asserting the first and last values of every canonical Python error range,
including NETWORK (150–179) and AUTH (320–349). Retain cases for zero and
out-of-range values, and map each boundary to its expected ErrorCategory.

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bindings/python/tests/test_errors.py (1)

82-83: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick win

Cover signed C ABI range bounds.

category_for_code accepts signed C ABI codes, but this test checks only positive values. Add assertions for negative range endpoints. This prevents a regression that removes the magnitude normalization while all current range tests pass.

Proposed test update

     assert category_for_code(first) == category
     assert category_for_code(last) == category
+    assert category_for_code(-first) == category
+    assert category_for_code(-last) == category

Based on learnings, test boundary inputs outside the typical path.

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counterparts. Keep the existing positive endpoint assertions unchanged and cover
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In `@bindings/python/tests/test_errors.py`:
- Around line 82-83: Extend the range-boundary test around category_for_code to
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[Shreesh-Sree]

All review feedback is addressed in the latest head, b493d6f. Unknown serialized Python categories now stay UNSPECIFIED, and the tests cover the first and last values of all 18 canonical ranges.

[Shreesh-Sree]

Thanks for the thorough review @sanchitmonga22 — both issues are fixed in the latest push.

1. rag_out_to_js: captured buf->status into a local status before calling rac_proto_buffer_free, so the correct error code is passed to make_rac_error regardless of what free resets on the buffer.

2. make_rac_error: added a code != RAC_SUCCESS guard before calling rac_result_to_proto_error, so a success proto is never attached on the error path and asSDKException() always sees the real failure category.

Both changes are local to the two call sites — no other paths affected.

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[Shreesh-Sree]

Fixed in the latest push. fromSerializedSdkError now accepts an optional contextualMessage and sets it on the decoded proto when proto.message is absent. asSDKException passes candidate.message through, so operation details like "ragClear failed: -42" are preserved on the SDKException instead of being dropped.

[sanchitmonga22]

Thanks for this, @Shreesh-Sree! I checked the mapping itself rather than taking it on trust: I parsed the commons, TS and Python range tables and compared them over -1300..1300 - zero mismatches - and all three now return UNSPECIFIED for an unmapped magnitude (-12345, the core range, anything over 999), exactly as your new core test asserts. The base bug you fixed along the way is real and worth having: rag_out_to_js used to read buf->status after rac_proto_buffer_free had reset it to success.

Two small things to sort out before we merge:

1. bindings/electron/src/errors.ts:279 - if (contextualMessage && !proto.message) can never be true, so the message you pass in is dropped and commons' generic one wins. populate_sdk_error always sets message from rac_error_message(), which is a switch with 127 literal arms and a default: return "Unknown error code" (core/src/core/rac_error.cpp:22-368) - there is no empty return. Concretely, a RAG query with an empty query string showed "RAGQueryOptions.query is required" before this PR and now shows "Invalid argument" (core/src/features/rag/rac_rag_proto_abi.cpp:992-993), because asSDKException() returns the decoded proto and that takes precedence. The comment above the guard says the opposite of what the code does. Simplest fix: set proto.message = contextualMessage whenever it is present, keeping code/category from the proto - or, if proto-wins is deliberate, drop the branch and correct the comment.

2. bindings/kotlin/src/main/kotlin/com/runanywhere/sdk/foundation/bridge/extensions/CppBridgeRAG.kt:14-15 - RAGStreamEvent now sits before RAGStatistics, which trips ktlint's import-ordering rule. I reproduced it in the build lane: the clean base passes ./gradlew ktlintCheck --rerun-tasks and the merged head fails with Imports must be ordered in lexicographic order. PR build matrix doesn't trigger on temp/development, so CI would not have caught it. Swapping the two lines restores the base order.

Not blocking: I opened #{issue:1} for the TS SDKs still reporting INTERNAL for magnitudes outside idl/errors.proto, and #{issue:2} to bring the header comment and the proto-ts/AGENTS.md row up to the new contract - you're welcome to pick either up.

Everything else is genuinely good, and the sweep across the binding matrix made this easy to check. Once those two are in we'll take another look.

Reviewed with help from Claude Code and Codex.

[sanchitmonga22]

Correction to the review above: its issue references came through as raw placeholders. They were:

• errors: TS SDKs report INTERNAL for magnitudes outside idl/errors.proto, not UNSPECIFIED #1122 — errors: TS SDKs report INTERNAL for magnitudes outside the IDL range
• docs: the error-category contract still describes the old commons mapping #1123 — docs: the error-category contract still describes the old behaviour

Nothing else in that comment changes.

Reviewed with help from Claude Code and Codex.

[sanchitmonga22]

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Review comments at @bindings/electron/src/errors.ts:
- Around line 279-280: Update the contextual-message handling in
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preserve the existing contextual-only behavior when proto.message is empty, and
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[Siddhesh2377]

Hey @Shreesh-Sree, I have switched this PR's base to main, could you rebase onto main and resolve any conflicts, keeping the diff as minimal as possible? Thanks! 🙏

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Review comments at @README.md:
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Hey bro, please address the open comments, this pr has to be merged Thanks 🍀

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Review comments at @bindings/electron/src/errors.ts:
- Around line 169-170: Update fromSerializedSdkError and fromProto so
SDKException retains the original serialized sdkError bytes while constructing
any contextual display message separately; ensure decoding the preserved bytes
again does not append the context a second time.

After applying the fix, consider running `coderabbit review --agent` for local
review. Visit https://docs.coderabbit.ai/cli?utm_source=ghpr

---

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Commits

Reviewing files that changed from the base of the PR and between a1aed2e and acc6bae.

Files selected for processing: 19

• bindings/electron/native/addon.cpp
• bindings/electron/src/errors.ts
• bindings/electron/src/process/dispatch.ts
• bindings/electron/test/unit/dispatch.test.ts
• bindings/electron/test/unit/errors.test.ts
• bindings/kotlin/src/main/kotlin/com/runanywhere/sdk/foundation/bridge/extensions/CppBridgeRAG.kt
• bindings/proto-ts/src/convenience/errors_category.ts
• bindings/python/_build/ra_build_backend.py
• bindings/python/docs/reference/architecture.md
• bindings/python/docs/reference/best-practices.md
• bindings/python/runanywhere/errors.py
• bindings/python/tests/test_errors.py
• core/include/rac/core/rac_error_categories.def
• core/include/rac/core/rac_error_proto.h
• core/include/rac/foundation/rac_proto_adapters.h
• core/src/core/rac_error_proto.cpp
• core/src/foundation/rac_proto_adapters.cpp
• core/tests/test_result_to_proto_error.cpp
• idl/codegen/generate_python_errors.py

Files skipped from review as they are similar to previous changes: 5

• bindings/python/docs/reference/architecture.md
• bindings/electron/src/process/dispatch.ts
• bindings/kotlin/src/main/kotlin/com/runanywhere/sdk/foundation/bridge/extensions/CppBridgeRAG.kt
• bindings/proto-ts/src/convenience/errors_category.ts
• bindings/python/docs/reference/best-practices.md

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[cubic-dev-ai]

All reported issues were addressed across 20 files

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[cubic-dev-ai]

1 issue found across 5 files (changes from recent commits).

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Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. When an issue isn't valid or won't be fixed in this PR, reply in its thread with the reason and then resolve the thread. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="bindings/electron/native/addon.cpp">

<violation number="1" location="bindings/electron/native/addon.cpp:873">
P2: `RagProtoWorker` drops the contextual `out.error_message` from the structured `sdkError`; copy it into `details_` before freeing `out`, falling back to the thread-local detail only when no buffer message exists.</violation>
</file>

[Shreesh-Sree]

@Siddhesh2377

Follow-up fixes are pushed in 3614f68b1 and ea1d1e141. This also addresses the linked follow-ups #1122 (unknown raw-code category fallback across Electron/Web/React Native) and #1123 (stale category mapping guidance); #960 already closes #880. PR #779 is already merged.

Verification: Electron focused error suite 21/21 passed; Web SDKException regression and core typecheck passed; React Native SDKException suite 17/17 and core typecheck passed. The React Native full install hit a missing CFPropertyList Ruby gem, and the Electron native addon was not compiled locally.

[coderabbitai]

Tip

For best results, initiate chat on the files or code changes.

@Shreesh-Sree Thanks for the update. You report that 3614f68b1 and ea1d1e141 address the follow-ups, with the focused Electron, Web, and React Native checks passing.

The Electron native addon build and full React Native install remain unverified. Before merging, confirm those checks in CI or a configured local environment. Also confirm the rebase onto main and the Kotlin ktlintCheck result, since this update does not report them.

I have not independently verified the latest commits in this reply.

---

🧠 Learnings used

Learnt from: CR
Repo: RunanywhereAI/runanywhere-sdks PR: 0
File: bindings/proto-ts/AGENTS.md:0-0
Timestamp: 2026-10-20T02:52:02.617Z
Learning: Applies to bindings/proto-ts/src/convenience/errors_category.ts : Source excerpt:
# AGENTS.md

## The hand-written files, and why codegen skips each one

| File | Why it's hand-written |
|---|---|
| `convenience/errors_category.ts` | The `ErrorCode` → `ErrorCategory` numeric-range table. The fold exists only as C++ control flow (`rac::foundation::rac_result_to_proto_category` in `core/src/foundation/rac_proto_adapters.cpp`), not as proto annotations, so there is nothing for codegen to read. This TS table intentionally covers more ranges (up to 999) than commons currently maps (100–329, falls through to INTERNAL) — do not "fix" it down to match commons; that's a known, deliberately deferred commons gap. |

Learnt from: CR
Repo: RunanywhereAI/runanywhere-sdks PR: 0
File: bindings/react-native/Docs/ARCHITECTURE.md:0-0
Timestamp: 2026-10-20T02:56:37.160Z
Learning: Source excerpt:
# RunAnywhere React Native SDK Architecture

## Verification

Documentation-only edits do not require build gates. Code alignment PRs must at minimum run:

```bash
yarn workspace @runanywhere/core typecheck
yarn workspace @runanywhere/llamacpp typecheck
yarn workspace @runanywhere/onnx typecheck
yarn workspace runanywhere-ai-example typecheck
```

Learnt from: CR
Repo: RunanywhereAI/runanywhere-sdks PR: 0
File: bindings/electron/AGENTS.md:0-0
Timestamp: 2026-10-20T02:50:49.560Z
Learning: Source excerpt:
# AGENTS.md

## TypeScript is the only authoring language

### Verification gates

All three must pass before handoff. `pr-build.yml` `electron-unit` runs them on Linux;
`electron-sdk-ci.yml` re-runs the TypeScript gates on Windows and adds the thin native
matrix (`electron-windows` / `electron-macos`). A green `build` with a red `typecheck`
means a test file is lying about a type.

---

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[cubic-dev-ai]

All reported issues were addressed across 6 files (changes from recent commits).

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