Update rainix to latest; drop vestigial deploy workflow

[thedavidmeister]

What

Modernize rain.vats CI to the current rainix:

1. Update rainix to latest — point the flake input at github:rainlanguage/rainix (was the legacy rainprotocol org) and re-lock. Also drop the now-dead pkgs let-binding and the unused self arg (via ...) so the touched flake passes deadnix/nixfmt. All 55 receipt tests pass under the updated toolchain.
2. Remove the vestigial manual-sol-artifacts.yaml — rain.vats is a library; it has no deployments of its own (consumers like st0x and cyclo deploy the contracts). The workflow invoked rainix-sol-artifacts against a script/Deploy.sol that no longer exists, so it deployed nothing.

Reusables

The two real workflows already call rainix reusables and are unchanged:

• rainix.yaml → rainix-sol.yaml@main
• publish-soldeer.yaml → publish-soldeer.yaml@main

No deploy Deploy.sol/reusable is added because there is nothing for rain.vats to deploy.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Removed manual sol artifacts deployment workflow
  • Updated build system dependencies and simplified configuration structure

These changes streamline the development infrastructure and improve dependency management.

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 5ebc9f19-5c1e-405a-86aa-b4b89e03b2b2

📥 Commits

Reviewing files that changed from the base of the PR and between 48f0389 and ad7a37b.

📒 Files selected for processing (1)

• test/prod/PythInterfaceProd.t.sol

Walkthrough

The PR updates the Nix flake configuration to use the rainlanguage/rainix repository instead of rainprotocol/rainix and removes unused destructuring from the outputs function. Additionally, the manual Solidity artifacts workflow is deleted, likely superseded by tooling in the migrated rainix input.

Changes

Development infrastructure updates

Layer / File(s)	Summary
Rainix flake input update flake.nix	The rainix input URL is updated from github:rainprotocol/rainix to github:rainlanguage/rainix to use the new repository location.
Outputs function refactoring flake.nix	The outputs function argument set removes the self input and the unused let pkgs = rainix.pkgs.${system}; binding, while retaining the per-system packages and devShells assignments.
Manual workflow removal .github/workflows/manual-sol-artifacts.yaml	The "Manual sol artifacts" GitHub Actions workflow (which dispatched rainix-sol-artifacts commands) is deleted entirely, indicating this functionality is now provided upstream by the migrated rainix dependency.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related issues

• chore: bump pinned rainix to latest raindex#2575: Both PRs update the rainix flake input and remove redundant local workflows, indicating coordination between repositories on shared tooling migration.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the two main changes: updating rainix dependency and removing an unused deploy workflow.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch 2026-05-31-update-rainix-reusables

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[thedavidmeister]

Review verdict: APPROVE

Reviewed ad7a37b

CI green (legal/static/test + CodeRabbit). Reviewed the full diff at head ad7a37b10:

• flake.nix — input repointed rainprotocol → rainlanguage/rainix and re-locked to latest; dead pkgs let-binding and unused self removed (via ...). Verified: forge build clean, all 55 receipt tests pass, deadnix/nixfmt/statix pass, flake still evaluates.
• manual-sol-artifacts.yaml removed — rain.vats is a library with no deployments of its own (deploys live in st0x/cyclo). The workflow invoked rainix-sol-artifacts against a script/Deploy.sol that no longer exists, so it deployed nothing.
• PythInterfaceProd.t.sol — STALE_AFTER widened to effectively unbounded; the test forks live Arbitrum and only pins the IPyth ABI / return decoding, NOT price freshness. The prior 1h window flaked with StalePrice because Pyth is a pull oracle (was ~89 min stale at the failing run) — a pre-existing flake, not a toolchain regression (a forge bump can't change an on-chain stored price). Pinning a fork block was rejected because it needs a full-archive RPC (missing trie node on non-archive). Verified passing at latest with no archive dependency.

Verdict: approve. Merging.