pypto-precision-debug

Diagnose PyPTO operator precision failures through syntax checks and prioritized workaround attempts.

Updated Sep 15, 2026
One-click install
npx skills add https://github.com/WangWindow/CANN-BatchMatMulMaxsum --skill pypto-precision-debug-wangwindow
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: pypto-precision-debug
Source: https://github.com/WangWindow/CANN-BatchMatMulMaxsum/tree/main/.agents/skills/pypto-precision-debug
Command: npx skills add https://github.com/WangWindow/CANN-BatchMatMulMaxsum --skill pypto-precision-debug-wangwindow

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? When a PyPTO operator fails precision verification—producing wrong outputs, numerical deviations, or inconsistent results—developers need a structured way to check user-level code and try known workarounds before suspecting framework bugs. This Skill provides that systematic troubleshooting workflow. ## Core Features & Use Cases - Frontend and Syntax Checks: Verifies use of the recommended pypto.frontend.jit decorator and audits dtype, shape, and valid_shape configuration in user code. - Prioritized Workaround Table: Applies seven ranked mitigations including avoiding view+reshape inplace=True, unroll_list=[1], submit_before_loop=True, the +0.0 trick, shape adjustment, pypto.zeros initialization, and valid_shape parameters. - Escalation Discipline: Routes unresolved cases to the pypto-precision-compare skill for bisection, and only reports a possible framework issue after all steps are exhausted. - Use Case: Your PyPTO Add operator passes on most shapes but fails when the tail axis is 1. The Skill walks you through frontend checks, then targeted workarounds like shape adjustment and valid_shape fixes until precision is restored. ## Quick Start Ask the assistant to troubleshoot your PyPTO operator whose precision verification fails, describing the failing shapes and symptoms so it can apply the step-by-step debugging workflow.

Frequently Asked Questions about pypto-precision-debug

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I debug PyPTO operator precision verification failures?

Follow a four-step workflow: confirm the pypto.frontend.jit decorator is used, check dtype, shape, and valid_shape in your code, then try seven ranked workarounds such as unroll_list=[1] and avoiding view+reshape inplace=True. If all fail, escalate to bisection-based localization.

What workarounds fix PyPTO precision issues?

Seven ranked mitigations exist: use pypto.frontend.jit, avoid inplace reshape after view, set unroll_list=[1], enable submit_before_loop=True in nested loops, add +0.0 to block over-optimization, adjust problematic shapes, initialize tensors with pypto.zeros, and pass valid_shape to view or reshape.

Why does reshape with inplace=True cause precision errors after pypto.view?

After pypto.view, the view's offset and valid_shape metadata are not correctly propagated when reshape runs with inplace=True, so the result points to the wrong memory region. Setting inplace=False on the reshape avoids this; standalone reshape with inplace=True remains safe.

When should I use pypto-precision-debug versus pypto-precision-compare?

Use pypto-precision-debug first for user-code syntax checks and quick workarounds. Switch to pypto-precision-compare only when all debug workarounds fail, since compare performs bisection to locate the specific failing op. Debug does not analyze framework internals.

Can pypto-precision-debug confirm a PyPTO framework bug?

No, it can only report that the issue is possibly at the framework level. That conclusion requires completing frontend checks, code syntax review, all seven workarounds, and bisection localization, with no logic errors found in the user code.

Why does my PyPTO operator give different wrong results on each run?

Run-to-run random drift usually means uninitialized memory participates in computation. Tensors created with pypto.Tensor contain random values, so read-modify-write buffers should be created with pypto.zeros or fully written before any read.