docs: add CLAUDE.md for the openipc branch

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Adds CLAUDE.md, guidance for Claude Code sessions on this branch.

• This branch holds only the README and the build workflows. build-hisilicon.yml is called from openipc-hisilicon's ci.yml, so a change here changes that branch's CI.
• Records what the workflow must keep consistent:
  • the build and smoke matrices and the README's SoC list
  • the 256K NOR / 768K NAND partition limits
  • the autoboot-prompt smoke criterion
  • the hold- artifact prefix
  • why release and publish are separate inputs
• Points to openipc-hisilicon's own CLAUDE.md, added in the companion PR.

Documentation only; no workflow change.

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PR Summary by Qodo

Document openipc branch and HiSilicon CI guidance

📝 Documentation 🕐 10-20 Minutes

AI Description

• Add Claude Code guidance explaining this branch’s role and its relationship to the HiSilicon
 source branch.
• Record CI invariants to preserve when changing SoC coverage, smoke tests, artifacts, or
 publishing.
• Provide local validation commands and point to the source branch’s companion guidance; workflows
 remain unchanged.

Diagram

graph TD
  Agent["Claude Code"] --> Guide["Branch guide"] --> Source["HiSilicon guidance"]
  Caller["HiSilicon CI"] --> Workflow["Build workflow"]
  Guide --> Workflow
  Guide --> Readme["SoC documentation"]

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High-Level Assessment

A branch-local guide is appropriate because this branch owns the reusable workflow while bootloader sources and their guidance live elsewhere. Duplicating source-tree guidance here would risk drift; linking to it keeps responsibilities clear.

Files changed (1) +105 / -0

Documentation (1) +105 / -0

CLAUDE.mdAdd branch-specific Claude Code and CI guidance +105/-0

Add branch-specific Claude Code and CI guidance

• Explains the branch layout and how HiSilicon CI calls its reusable workflow. Documents SoC-list alignment, image limits, smoke criteria, held artifacts, release and publish behavior, and commands for local validation.

CLAUDE.md