A skill that teaches any coding agent to write idiomatic, correct, current Ada and SPARK.

Ada/SPARK tooling and ecosystem changed substantially between 2022 and 2026. The dominant failure mode for agents is stale advice: pointing users at the discontinued GNAT Community edition, writing pragma Precondition instead of contract aspects, claiming "SPARK can't do pointers", or calling the static analyzer "CodePeer" after it became GNAT SAS. This plugin ships an always-on correction map plus focused guidance for contracts, the Alire ecosystem, SPARK proof, and embedded - so agents target the current toolchain, not their training data.

• Embeds a stale-to-current correction map agents apply on every Ada/SPARK task: GNAT Community is dead -> Alire (alr) + GNAT FSF; with Pre => aspects not pragma Precondition; Pre'Class/Post'Class govern dispatching calls, not plain Pre/Post; CodePeer is now GNAT SAS; SPARK has a Rust-like move/observe/borrow model for access types; Ada 2022 is finalized (-gnat2022).
• Core rules for idiomatic packages, contracts (Pre/Post/Contract_Cases), strong typing, controlled types, and tasking.
• SPARK guidance: assurance levels (Stone/Bronze/Silver/Gold/Platinum), proof of absence of runtime errors (AoRTE), loop invariants, ghost code, ownership/borrow.
• Embedded guidance: Ravenscar vs Jorvik profiles, light/embedded runtimes, fixed-point and representation clauses, elaboration order.
• Links to current upstream docs (learn.adacore.com, docs.adacore.com, ada-auth.org) for depth, rather than bundling a deep-dive guide that would drift.

claude plugin marketplace add agent-sh/ada-spark
claude plugin install ada-spark

Or add it through the agentsys marketplace alongside the rest of the agent-sh ecosystem.

The skill activates automatically on Ada/SPARK work. Triggers include:

write an Ada package for a bounded stack with contracts
prove this subprogram free of runtime errors with SPARK
is this idiomatic Ada 2022?
set up an Alire project targeting a Cortex-M board
why won't GNATprove discharge this loop invariant?

It does not activate for unrelated languages.

skills/ada-spark/SKILL.md   the skill (correction map + core rules + workflow + doc links)
agent-knowledge/            research foundation the skill routes to for deep dives
.claude-plugin/             Claude Code plugin + marketplace manifests
.codex-plugin/              Codex plugin manifest

agnix .                  # validate skill + manifests (zero errors required)
claude plugin validate . # validate marketplace and plugin manifests

Ada/SPARK guidance is grounded in current upstream docs, not model memory - re-verify any toolchain version or stdlib unit against the installed toolchain and alire-project/GNAT-FSF-builds releases.

• skill-curator - for writing and reviewing skills
• agnix - the linter that validates this plugin
• Part of the agent-sh ecosystem

MIT