Self-hosted programming language and toolchain with Python-like syntax, native compilation, integrated testing, and bare-metal support.
This repository also configures its own agents. See what simple tells them →
Skill Claude CodeCodex
Create architecture, UI design, system tests, and detail design for a feature. Self-sufficient — if research/requirements missing, does them first. Does not depend on any other LLM.
Skill Claude CodeCodex
Implement a feature end-to-end. Self-sufficient — if research, requirements, or design are missing, creates them first. Covers implementation, testing, duplication check, refactoring, and verification.
Skill Claude CodeCodex
Collaborate through canonical LLM Caret rooms, task routing, context bundles, profiles, receipts, and artifacts.
Skill Claude CodeCodex
Plan, implement, or verify Simple parallel code involving tasks, actors, threads, processes, GPU/device work, transfer, memory layout, task arenas, mailbox bounds, or deterministic parent-authoritative commit. Use when mutable state crosses execution domains or when AoS/SoA/AoSoA policy affects concurrency safety or…
Skill Claude CodeCodex
Lazy senior developer mode: YAGNI -> Simple stdlib -> native/platform -> installed dependency -> one line -> minimum code. Levels lite/full/ultra, persisted in .simple/ponytail.level. Use on ponytail, be lazy, simplest solution, yagni, do less, over-engineering complaints.
Skill Claude CodeCodex
Prepare and promote stable or prerelease Simple releases from isolated sessions and immutable admitted candidates.
Skill Claude CodeCodex
Run local + domain research for a feature. Search src/ and doc/ for related code, web search for external knowledge, generate requirement options, ask user to select. Self-sufficient — does not depend on any prior step.
Skill Claude CodeCodex
Select and implement Simple FFI boundaries while preferring in-tree pure-Simple counterparts, especially PureDatabase over C SQLite wrappers.
Skill Claude CodeCodex
General protected software-release rules for stable and prerelease channels, maintenance backports, immutable candidates, and promote-without-rebuild publication.
Skill Claude CodeCodex
Production readiness verification. Checks SPipe tests for stubs/dummies, implementation completeness, requirement coverage, NFR targets, and architecture/design doc freshness. Self-sufficient — any LLM can run independently.
Skill Codex
Codex architecture skill (Codex-specific strength). MDSOC patterns, virtual capsules, feature transforms, module structure evaluation, ADR writing. Reference: doc/04architecture/.
Skill Codex
Writing or extending a capability trait pair/group (debug/profile worked example). Value-semantics hazards, CapLevel honesty, critical mode, and falsifiable-spec rules. Reference: doc/07guide/language/capabilitylibraryauthoring.md.
Skill Codex
Simple language coding rules for Codex. Key syntax, generics, pattern binding, constructors, runtime limitations, reserved keywords. Reference: doc/07guide/quickreference/syntaxquickreference.md.
Skill Codex
Work on the Simple IDE Office plugin suite: Markdown/Writer, Impress/PPT, Calc, Draw/SDD, Designer, Base, Math, Mail, Planner, dashboard, DB admin, plugin manifests, and feature-check verification.
Skill Codex
Create or update concise TLDR companion Markdown files for long repo documents, especially doc/04architecture/.md. Use same-directory naming: xxxxx.md -> xxxxxtldr.md.
Skill Codex
Write or refactor layered MDSOC-style architecture docs for this repo, especially for compiler, loader, interpreter, and shared tree-node visibility. Use when the task asks for layers, tree encapsulation, public-to-next-layer rules, common node extraction, or sibling-private/tree-private analysis.
Skill Codex
Optimize Simple code and performance-sensitive paths using SPipe evidence and the in-repo Simple OptimizerPlugin surfaces. Use when asked to make Simple as fast as C/Go, run performance checks, remove unused logic/data, apply optimizer-plugin guidance, or improve algorithms without changing language, behavior, or user…
Skill Codex
Code quality refactoring workflow — 5 phases: file size, duplication, coupling, Big-O, test verification. Use when cleaning up code.
Skill Codex
Operate repo-local Simple UI surfaces through the canonical UI access protocol: snapshot, surface, find, act, and history.
Skill Codex
SPipe dev entrypoint: refine a feature/bug/TODO into acceptance criteria, then continue through the SPipe pipeline.
Skill Codex
Commit, fetch/pull, rebase, and push with file-count safety checks. Worktree-aware jj sync. Use when syncing the repository.
Skill Codex
Codex system test design skill (Codex-specific strength). Step-based SSpec .spl scenario generation through the SPipe runner/docgen process. Built-in matchers only. REQ-NNN to test traceability. Test plan creation.
Skill Codex
TRACE32 container control skill. Use when the user wants to turn TRACE32 on or off, relaunch it, reopen the GUI container, inspect logs/status, or retry the repo-managed TRACE32 container flow.
Skill Codex
Use when a Simple bootstrap/native-build is unstable, slow, or failing one bug at a time and needs cache-preserving repairs, isolated parallel mini builds, independent failure collection, and bounded fix/rebuild cycles toward a working Simple executable.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: