proton

Timeplus streaming SQL covering stream types, EMIT policies, window functions, JOINs, materialized views, external streams, and UDFs. Make sure to use this skill for any SQL-related question including writing queries, debugging SQL errors, understanding streaming behavior, or designing stream processing pipelines, even if the user doesn't explicitly mention streaming SQL.

Analyze jemalloc or async-profiler allocation profiles in collapsed stack format. Make sure to use this skill whenever the user mentions memory profiling, heap analysis, allocation hotspots, jemalloc, async-profiler, collapsed stacks, .folded files, or asks about memory usage patterns.

Build, compile, run server/client/cluster, execute unit/stateless/SQL tests, verify results, and troubleshoot build/test failures. Make sure to use this skill whenever the user mentions building, compiling, ninja, cmake, running tests, test failures, starting the server, or pre-commit checks, even if they just say 'it doesn't build' or 'the test broke'.

Diagnose Proton CI failures and performance comparison results from GitHub checks and uploaded reports. Make sure to use this skill whenever CI checks are mentioned, a PR has red or failing checks, the user pastes a CI URL, or asks about test failures in the pipeline, even if they just ask 'why is CI failing'.

Write or review Timeplus/Proton C++20 code covering naming conventions, Proton fences, clang-format, IProcessor patterns, and checkpointing. Make sure to use this skill for any C++ code changes, additions, or reviews in this codebase, including small fixes, new functions, refactoring, or style questions, even if the user doesn't explicitly mention coding conventions.

Create a Proton git worktree with local submodule reuse. Make sure to use this skill whenever the user wants to work on a separate branch in isolation, needs a clean working copy, or mentions worktrees, even if they just say 'I want to start working on issue X in a separate directory'.

Review a Proton pull request or diff for correctness, streaming semantics, checkpointing, compatibility, and performance. Make sure to use this skill whenever the user mentions reviewing code, checking changes, PR feedback, or wants an opinion on a diff, even if they just say 'look at this PR' or 'is this change safe'.