CI rehearsal only (do not merge)

[michael-moffett]

Fork CI only. Do not merge.

[greptile-apps]

Confidence Score: 4/5

[Medium risk] Adds protocol acceptance logic to the payment gate.

The PR should not be merged until the new public predicate agrees with Config-based protocol selection.

Findings

1.  Inherited protocol limits are ignored ▶

Summary

This PR adds a PHP Gate::accepts() predicate and tests, marks that interface item complete in the migration guide, and adds greptile.json.

• The new predicate does not honor Config’s protocol allowlist when a gate inherits it.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  G["Gate: accept = null"] --> P["Gate::accepts(X402)"]
  G --> M["Middleware protocol selection"]
  P --> T["true, unless gate has fees"]
  M --> C["Config: accept = [MPP]"]
  C --> F["X402 excluded"]

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_{Reviews (1) · Last reviewed commit: "greptile.json: review on request only"}

[greptile-apps]

Inherited protocol limits are ignored When a gate has no explicit accept list, this method returns true for any fee-free protocol without checking Config. With a configuration that accepts only MPP, gate->accepts(Protocol::X402) therefore returns true even though the middleware excludes X402. Callers of this new public method get an admission decision that contradicts the configured protocol limit.