Add Solana ALT operations skill

[anantgar]

Summary

Adds solana-alt-ops-skill, a production-oriented skill for operating Solana Address Lookup Tables (ALTs) safely.

Why

ALTs solve a real versioned-transaction problem, but they also introduce on-chain state, authority management, same-slot activation behavior, wallet/RPC compatibility, and a non-obvious retirement lifecycle. This submission treats an ALT as a versioned operational dependency rather than a loose list of addresses.

Included

• Progressive SKILL.md routing for architecture, operations, v0 composition, security, testing, and observability.
• An offline manifest validator that catches malformed keys, duplicates, capacity overflow, unsafe mutable/frozen authority combinations, and static-vs-loaded address overlap.
• Fixture-backed Node tests and a GitHub Actions validation workflow.
• Explicit rules for signer safety, fresh-table compilation, canary rollouts, fallback paths, and deactivation/closure.
• A concrete offline demonstration and focused planning/audit command contracts.

Safety model

• No private-key handling, signing, or live transaction sending.
• Read-only planning/audit guidance by default.
• Requires exact v0 simulation and a tested fallback before production rollout.
• Makes the freeze tradeoff explicit: a frozen table loses the authority needed to extend, deactivate, or close it.

Validation

cd solana-alt-ops-skill
bash scripts/validate.sh

Validated locally: Node tests pass, the strict valid-manifest fixture passes, shell syntax is checked, and git diff --check is clean.

Standalone repository: https://github.com/anantgar/solana-alt-ops-skill