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kitty-tab-note places a large colored note over a parked kitty terminal tab so a long-running build, REPL, SSH session, or coding agent has a visible return point. A keybinding opens the note, any key dismisses it, and the existing terminal content and title remain intact; color, position, and size are configurable. The script uses Python’s standard library but requires kitty 0.40 or newer with remote control enabled.

gsheets-apps-script-skill helps teams turn a Google Sheet or CSV into working Google Apps Script and HTML Service code. It formats and validates sheets, adds lookup or aggregation formulas, builds a validated data-entry form, and handles common traps such as empty sheets, text dates, and deployment file names. The generated code still needs to be deployed in the user's Google environment.

Collaborative Editor works through structure, grammar, wording, and coherence in that order, raising concrete choices instead of silently rewriting the draft. It treats long sentences, parentheticals, and blunt phrasing as possible voice, then closes with a redline the author can inspect. Outputs include a Word document with native tracked changes plus portable HTML or PDF visual redlines. The workflow is for writers who want control over every accepted change.

security-hardening offers an audit mode for existing code and a guard mode while building a feature. It checks core application-security areas such as authentication, authorization, inputs, secrets, uploads, and data protection, then ties each finding to a concrete file location and fix. The skill is stack-agnostic and uses a default-deny stance: a domain is not called safe until the relevant code has been inspected.

REM Sleep processes an agent’s session trace into atomic, retrievable memories, links related lessons, prunes noise, and separates useful guidance from the emotional charge of an event. Its default store is a file-based index with one fact per file and frontmatter, but the stages can adapt to another format after asking once. The skill is intended for cross-session learning and works with Claude Code, Codex, and Cursor without requiring a database.

Immune Check scans an artifact before it enters a public repository, external service, release, or inbox. It looks for API keys, private keys, passwords, cookies, personal or health data, internal hostnames, home paths, build output, and oversized vendored material, selecting an available scanner or falling back to a built-in pattern pass. The skill is stack-agnostic and records which scanner ran, so a release gate can show the depth of its check.

Sunset guides an agent through deciding whether a project is truly finished, recording what worked and what ended it, harvesting reusable code or lessons, and archiving the project with a visible marker instead of deleting it silently. It also closes lingering loops so an inactive project stops consuming attention. The archive is designed to be reversible, and the first safeguard is distinguishing a frozen project from one that is genuinely dead.

Roam turns a natural-language world brief into a single HTML experience that can be explored in the browser. One track builds dependency-free CSS-3D corridors for scroll-through stories; another uses Three.js for first-person rooms with WASD, mouse look, GLB furniture, and tileable textures loaded through an import map. The skill avoids a build step, but the project is an early prototype and the room track still depends on browser-loaded Three.js assets.

polish packages several agent skills for Claude Code, Codex CLI, and Cursor; its prompt-polish entry turns a rough question into a ready-to-paste bilingual prompt by selecting suitable prompt-engineering strategies. The same collection includes duplicate-file planning, a pre-push gate, frontend design, brainstorming, test-driven development, and systematic debugging. Users should invoke the relevant skill by name, because the repository is a collection rather than one monolithic prompt editor.

Playtime gives an agent a structured way to explore before a capability is needed. It chooses a playground with no production blast radius, tries unfamiliar tools, builds throwaway experiments, challenges skills with strange inputs, and harvests useful surprises into durable learning. The practice complements memory consolidation by generating new experience on purpose, while every experiment stays inside the system’s boundary. It is developmental work, not a request to ship the experiment.

Contemplation asks an agent to hold a question open instead of rushing toward an answer. It checks whether the frame is right, examines the goal and values behind it, names both sides of a tension at full strength, and can conclude that the tension should remain unresolved. The practice is solo and non-adversarial, distinct from a debate council, task retrospective, or memory pass. It is structured deliberation, not a mystical claim.

certora-prover-skill helps Claude Code write Certora Verification Language specifications for Solidity and EVM contracts, including rules, invariants, ghosts, hooks, and method summaries, then run certoraRun and diagnose counterexamples, vacuity, soundness, and timeouts. It keeps the distinction from testing explicit: a result covers every state allowed by the model, not every behavior omitted from the specification. The skill is an unofficial community package and requires the Certora Prover environment.

assay interviews the user until scope, repositories, contracts, and testable criteria are explicit, then runs an autonomous plan, research, implementation, convergence, polish, and ship-gate workflow. Machine checks decide whether correctness and completeness are sufficient, while the human intervenes at intake and before outward actions such as commits, pull requests, or ticket writes. The skill adapts to backend, frontend, mobile, CLI, library, and infrastructure projects across one or several repositories.

Solution Ladder makes an agent consider several architectural responses to a refactor or wiring problem: a local patch, a per-consumer escape hatch, a safer right default, and an outside-the-ladder wildcard. Separate blind subagents develop the options without knowing one another, then a blind judge ranks them against the current codebase and flags both insufficiency and overreach. The skill works in Claude Code, Codex CLI, and OpenCode; no level is universally correct.

Tokendiet converts PDFs, HTML pages, URLs, or images into lean Markdown and reports estimated token and cost savings. It includes OCR support, reproducible benchmarks, and warnings about visual loss, but charts, diagrams, complex layouts, and other visually important content are better read natively rather than reduced to text.

sign-safe decodes an opaque Solana transaction before signing, classifies dangerous instruction shapes from the signer's perspective, and emits a SIGN, HOLD, or REJECT verdict plus machine-readable JSON. Its core requires no key, RPC, or broadcast; optional simulation and RPC enrichment are separate, and SIGN only means the transaction passed the current static policy.

Trim Diff Noise classifies each branch diff hunk as definite noise, necessary, or borderline before changing anything. It reverts only approved definite noise, asks about borderline cases, verifies each revert with the project's test and lint commands, and leaves all reverts unstaged for review; its default verification assumes Ruby with RSpec and RuboCop.

apple-hig reviews interfaces for iOS, iPadOS, macOS, watchOS, tvOS, and visionOS against Apple Human Interface Guidelines. It looks at platform-specific interaction, accessibility, design tokens, and SwiftUI code, then reports actionable issues; the project lists Claude Code and an internet connection for current guideline data as requirements.