chore: align CI to the hardened canon, add AGENTS.md

[Unisay]

Brings this fork in line with the shared tooling canon and gives the AI coding agents a single source of truth.

CI (.github/workflows/ci.yml):

• Drop accept-flake-config = true. It let a PR's own flake nixConfig inject extra substituters and keys, which is a supply-chain risk; the caches are already pinned in extra_nix_config, so nothing is lost.
• luacheck now runs --std lua51 --no-unused-args instead of --std min. lua51 matches the actual target (it knows math.pow/math.atan2, which min flags), and --no-unused-args tolerates the curried fallback args the native FFI stubs ignore.
• Run the test step as bash ./scripts/test so it no longer depends on the file's execute bit.

AGENTS.md + CLAUDE.md:

• AGENTS.md is the one instruction file the coding agents read natively (Codex, Cursor, Copilot, Gemini CLI, Aider): the build/test/lint commands, the Lua 5.1 constraints, the FFI parenthesisation rule, and the toolchain pins.
• CLAUDE.md is a one-line @AGENTS.md import so Claude Code reads the same file instead of a second copy that drifts out of sync.

It also drops the dead .eslintrc.json, bower.json, package.json left over from the JavaScript build; the toolchain is spago plus nix now.

Tooling and docs only, no src/ change, so there is no tag or package-set bump.

Verification

nix develop -c ./scripts/build, the regression suite (bash ./scripts/test), and luacheck with --std lua51 --no-unused-args src/ are clean locally.

[Copilot]

Pull request overview

Aligns this fork’s CI and contributor/agent instructions with the shared hardened tooling canon for the PureScript→Lua (Lua 5.1) workflow, and removes legacy JavaScript build artifacts that are no longer used.

Changes:

• Harden Nix CI by dropping accept-flake-config, adjust the test invocation to not depend on execute bits, and tune luacheck to Lua 5.1 with --no-unused-args.
• Add AGENTS.md as the single source of truth for agent/dev commands and constraints, and make CLAUDE.md import it.
• Remove obsolete JS-era tooling files (package.json, bower.json, .eslintrc.json).

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
.github/workflows/ci.yml	Hardens Nix config handling; adjusts test invocation and luacheck flags for Lua 5.1.
AGENTS.md	Adds canonical agent instructions (commands, Lua 5.1 constraints, FFI export rule, toolchain pins).
CLAUDE.md	Imports AGENTS.md to keep Claude instructions in sync.
package.json	Removes legacy Node/Pulp-based scripts and dev dependencies.
bower.json	Removes legacy Bower dependency manifest.
.eslintrc.json	Removes legacy ESLint configuration.

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