Your agent invents things because it has no memory, and can't touch your database because it has no arms. rsc is the meta-harness that gives it both, plus the trade to know the job and the reflexes to not break your repo. For Claude Code, Codex and 15 more.
Skill Claude CodeCodex needs its repo
Use when building, structuring, testing or optimizing a Flutter app — feature-first layering, Riverpod 3 or Bloc, typed gorouter, freezed models, a dio data layer, Material 3, jank hunting, widget/golden tests. Targets Flutter 3.44 / Dart 3.12. NOT React Native (that is react-native), NOT Compose Multiplatform (that…
Skill Claude CodeCodex needs its repo
Use when deploying or operating an app on Fly.io — writing fly.toml, placing Machines in regions near users, attaching Volumes, managing secrets, or picking a scaling lever (autostop/autostart, scale count, fly-replay). NOT choosing which host to deploy on (that is deployment), NOT a git-push PaaS with no regions…
Skill Claude CodeCodex
Use when projecting history forward — sales, demand, units, revenue, signups, traffic — into a defensible number with an error band: method by data shape, rolling-origin backtest, MASE vs the naive baseline. NOT an assumption-driven P&L or runway model (that is financial-model), NOT sizing reorder points or safety…
Skill Claude CodeCodex
Use when planning or running an equity round as a process: sizing the raise to a milestone, choosing post-money SAFE vs priced round, tiering investors by intro path, sequencing outreach for momentum, or reading a term sheet before signing. NOT the slide narrative (that is pitch-deck), NOT the cap-table or valuation…
Skill Claude CodeCodex
Use when designing or repairing what makes a game fun — verbs and mechanics, moment-to-moment/session/meta loops, progression, economy faucets and sinks, difficulty curves, dominant strategies, juice, prototyping and scope. NOT engine code (that is godot), NOT story (that is game-storytelling), NOT level layout (that…
Skill Claude CodeCodex
Use when a game's story is the work: premise and pillars, branching topology, meaningful choice, dialogue state, quests, environmental storytelling, ludonarrative harmony. Author portable — engine wiring is godot/unity/unreal. NOT the mechanics and economy the story serves (that is game-design), NOT level layout (that…
Skill Claude CodeCodex
Use when adding multiplayer or netcode to a game — client-server vs P2P, server authority and anti-cheat, state replication vs RPCs, prediction and reconciliation, lag compensation, plus Godot 4 / Unity NGO / Unreal wiring. NOT single-player gameplay (that is godot, unity, unreal), NOT matchmaking or server hosting…
Skill Claude CodeCodex needs its repo
Use when making NPCs, enemies, or units navigate a level — grid vs waypoint vs navmesh, A/JPS, navmesh baking and agent radius, off-mesh links, steering, RVO crowd avoidance, and flow fields in Godot 4.x, Unity, Unreal. NOT collision response or character controllers (that is gamedev-physics), NOT aggro or difficulty…
Skill Claude CodeCodex
Use when working with a game engine's physics — rigid bodies, colliders, collision layers and masks, character controllers, joints, forces versus impulses, raycasts and shapecasts, or when a simulation is unstable (tunnelling, jitter, missed overlaps). Covers the Godot, Unity and Unreal equivalents. NOT rendering or…
Skill Claude CodeCodex
Use when authoring or debugging a shader, material, VFX, or full-screen post-process in a game engine — Godot 4.x .gdshader, Unity 6 URP/HDRP, Unreal 5.x Materials, effect recipes, shader performance. NOT gameplay or engine-API code (that is godot/unity/unreal), NOT physics (gamedev-physics), NOT build variant…
Skill Claude CodeCodex
Use when exporting, packaging, signing, or publishing a game — export presets per engine, macOS notarization, cross-origin isolation for threaded web builds, Android AAB/keystore, iOS provisioning, store submission (Steam, Play, App Store, itch.io), headless build CI. NOT gameplay code inside the artifact (that is…
Skill Claude CodeCodex
Use when running a small product on core Google Cloud via the gcloud CLI: a project, Cloud Run deploys, a locked-down Cloud Storage bucket, managed Cloud SQL, and least-privilege IAM wiring them together. NOT AWS (that is aws-essentials), NOT the CI pipeline that ships the image (that is deployment), NOT Postgres…
Skill Claude CodeCodex
Use when producing the GDPR artifacts a product publishes or hands over: a privacy policy true to what it processes, a cookie/consent banner, a lawful basis per purpose, an Art. 28 DPA, an SCC transfer mechanism, or a DSAR flow. Drafts for counsel review. NOT internal retention rules (that is data-policy), NOT…
Skill Claude CodeCodex
Use when naming or scoping a branch, writing or fixing a commit message, picking the gitmoji for a commit, untangling history (rebase versus merge versus squash), or cutting a versioned release — the portable git-convention layer for any repo. Covers gitmoji + Conventional Commits, SemVer tags, branch hygiene…
Skill Claude CodeCodex needs its repo
Use when authoring or fixing GitHub Actions CI/CD — workflows under .github/workflows, triggers, job matrix, caching, token permissions, OIDC cloud deploys, environment gates, reusable workflows. NOT the Dockerfile or image build strategy (that is docker), NOT the branching model (that is git-workflow), NOT release…
Skill Claude CodeCodex needs its repo
Use when writing, reviewing, testing, or shipping Go code and HTTP services: idioms, %w error wrapping, goroutine/context/errgroup concurrency, net/http 1.22 routing, log/slog, project layout, table-driven tests, Go hardening. NOT language-agnostic threat modeling (that is secure-coding), NOT Dockerfile/CI shipping…
Skill Claude CodeCodex
Use when writing, reviewing, or debugging Godot 4.x games in GDScript or C# — scenes, nodes, custom Resources, autoload/EventBus signals, typed GDScript, CharacterBody2D/3D movement, GUT/gdUnit4 — or porting Godot 3 APIs to 4. NOT Unity/Unreal (that is unity/unreal), NOT .gdshader code (gamedev-shaders), NOT…
Skill Claude CodeCodex
Use when server-side code reads or writes Gmail, Drive, Calendar, or Sheets with a GCP service account and no human in the OAuth loop: picking the auth mode (app-owned vs domain-wide delegation vs keyless), scoping to least privilege, building the authed Node/Python client, staying under per-user quota, and debugging…
Skill Claude CodeCodex
Use when pursuing non-dilutive public or foundation funding — money you neither repay nor give equity for: finding a fit call, go/no-go, registration (UEI/PIC/BDNS), or writing the rubric-scored application, logic model, budget justification, or LOI. NOT an equity round (that is fundraising), NOT a paying-customer SOW…
Skill Claude Code
Use when governing a workspace's control plane, code or not — the 01-TOOLS/ tooling layer, the 02-DOCS/ chaos→knowledge wiki, the root Knowledge map. Audits it, migrates legacy XX- folders, scaffolds provider tooling, sweeps the inbox, writes root CLAUDE.md/AGENTS.md. NOT the bootstrap front door (that is init, which…
Skill Claude CodeCodex
Use when provisioning or hardening a Hetzner Cloud VPS: picking the plan/location (CX/CPX/CAX/CCX), bringing it up reproducibly with hcloud + cloud-init, locking down SSH, and wiring the Cloud Firewall to hand off a Docker-ready host. NOT app deploys on Coolify (that is coolify), NOT Dockerfiles (that is docker), NOT…
Skill Claude CodeCodex
Use when a role is open and you must write the job post, screen inbound candidates, structure the interview loop, or score them to a defensible Hire / On-Hold / No-Hire — including whether an AI résumé filter is legal. NOT after the offer is accepted — onboarding, payroll, performance (that is people-ops), NOT offer…
Skill Claude CodeCodex
Use when adding interactivity to a server-rendered app (FastAPI/Jinja, Django, Rails, Laravel, Go templates, Express) without adopting a JS framework — hx-get/post/put/delete with hx-target, hx-swap and hx-trigger, returning HTML fragments instead of JSON, out-of-band swaps, active search, infinite scroll, inline edit…
Skill Claude CodeCodex
Use when running open models or working on the Hugging Face platform — the Inference Providers router or InferenceClient, Hub repos via the hf CLI, a dedicated Inference Endpoint with scale-to-zero, a Gradio Space with ZeroGPU, picking an open model by task/license/size, or loading one locally with transformers. NOT…
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: