Extract the manifest naming-convention gate into a shared action (platform + platform-template both carry a copy)

[devantler]

🤖 Generated by the Daily AI Engineer

Evidence

The same manifest naming gate now exists independently in two repos — the holistic-review extraction signal:

• platform: scripts/validate-naming.py (also a portfolio scripting-stack violation — bash/Go only, never Python)
• platform-template: scripts/validate-naming.sh (bash port, added by platform-template#77 for platform-template#66)

The two will drift (the template port already had to diverge on its cr_dir_paths and exempt lists), and every future GitOps repo (gitops-tenant-template instances, new platforms) re-copies one of them.

Audience & impact

Every GitOps-shaped repo in the portfolio: divergent naming conventions and duplicated gate maintenance; the platform copy also blocks the portfolio Python ban from closing.

Hypothesis

One shared implementation in devantler-tech/actions (composite action; Go per the bash-first-Go-when-it-grows rule — the bash port is already ~250 lines) with per-repo config (CR-folder list, one-per-file exemptions) keeps all consumers on identical conventions and retires the platform's Python script.

Success signal

platform + platform-template both consume the shared action; validate-naming.py deleted from platform; zero per-repo gate copies remain.

Smallest useful change

Port the gate to Go inside devantler-tech/actions as validate-naming (inputs: config file path), with the template's bash version as the behavioural reference (it has a known false-negative fix the Python may lack: doc parsing must handle files with no leading ---).

Acceptance criteria

• Composite/Go action validate-naming in this repo, config-driven (CR dirs, exemptions).
• platform consumes it and deletes scripts/validate-naming.py.
• platform-template consumes it and deletes its bash copy.
• Both repos' CI still red on a seeded violation (RED/GREEN proof).

Rough size: M

[coderabbitai]

🔗 Related PRs

#427 - fix: resolve first-party self-references at the same commit [merged]
#518 - fix(create-issues-from-todos): avoid unpinned retry wrapper [merged]
#553 - fix(auto-merge): fail closed on trusted-bot review gates [merged]
#575 - fix(auto-merge): harden mutable review evidence [merged]
#594 - fix(validate-go-project): raise govulncheck timeout to survive cold-cache scans [merged]

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