stellar

extending yourself with a new reusable skill by interviewing the user

analyzing a change to determine what tests are needed and adding them to the test suite

modifying build configuration to enable/disable variants, switch compilers or flags, or otherwise prepare for a build

reviewing a change for semantic correctness, simplicity, design consistency, and completeness

reviewing a git diff for small localized coding mistakes that can be fixed without high-level understanding

how to run make correctly to get a good build, and otherwise understand the build system

running tests at various levels from smoke tests to full suite to randomized tests

comprehensive validation of a change to ensure it is correct and ready for a pull request

Stellar dApp / frontend development. Covers the JavaScript stellar-sdk (browser + Node.js), Freighter wallet, Stellar Wallets Kit (multi-wallet), Wallet Standard, smart accounts with passkeys, transaction building / signing / submission, smart contract…

Agentic and machine-to-machine payments on Stellar. Covers x402 (HTTP 402 paid APIs through a facilitator, fee-sponsored clients; the guide configures OZ Channels) and MPP (Machine Payments Protocol) in both Charge mode (per-request SAC) and Session mode…

Stellar smart contract development (Rust, soroban-sdk). Entry point with project setup, contract anatomy, and build/deploy workflow, routing to three companion files in this directory — development.md (storage/TTL, authorization, cross-contract calls, tokens,…

Stellar standards, ecosystem, and reference. Covers SEPs (Stellar Ecosystem Proposals), CAPs (Core Advancement Proposals), and a quick map for picking the right standard for wallets, anchors, payments, deposits/withdrawals, federation, deep links, and KYC.…

Cross-chain interoperability for Stellar. Entry point with a rail-selection decision table and shared pitfalls, routing to three companion files — cctp.md (Circle CCTP V2, native USDC burn-and-mint between Stellar and EVM/Solana chains, domain 27, the…

Stellar Assets (classic) + trustlines + Stellar Asset Contract (SAC) bridge to smart contracts. Covers asset issuance, distribution, authorization flags, clawback, regulated assets, trustline management, and the SAC interop layer that exposes classic assets…

Querying Stellar chain data via Stellar RPC (preferred) and Horizon (legacy). Covers RPC JSON-RPC methods, Horizon REST endpoints, streaming, pagination, historical queries, Hubble/Galexie for deep history, and the RPC/Horizon migration story. Use when…

Zero-knowledge proofs and privacy patterns on Stellar. Covers Groth16 verification in smart contracts via BLS12-381 host functions (CAP-59), the BN254 + Poseidon host functions (CAP-74/75), and concrete toolchain walkthroughs for Circom, Noir, and RISC Zero.…

Commit a logical unit of work with a descriptive message. Invoke after completing a meaningful chunk (component created, store wired, tests passing) to maintain small, reviewable commits.

Guide for building React components using @stellar/design-system and project SCSS conventions. Invoke when creating new components or reviewing component code.

Bridge Figma MCP output to Stellar Lab code conventions. Invoke after calling get_design_context to translate Figma's reference code into project-appropriate components, classes, and patterns.

Correct mental models for React re-renders and memoization. Use this skill when writing, reviewing, or optimizing React components to avoid common misconceptions about performance. Debunks the myth that "props cause re-renders" and teaches when memoization…

Reference for the two Zustand store patterns in Stellar Lab — main store (querystring) and transaction flow store (sessionStorage). Invoke when creating store slices, debugging hydration, or deciding where state belongs.

Run e2e and unit tests related to files changed on the current branch. Use after making code changes to verify nothing is broken.

Verification, build, test, and Docker checks for the x402-stellar monorepo. Use before committing, after rebasing, when modifying packages, or when asked to verify the project works.

Project context for the x402-stellar monorepo. Use this to understand what the project does, how it's structured, and how the pieces fit together. Load this first when working on any part of the codebase.

Work on Stellar Core Advancement Proposals in core/. Use when editing CAP documents, checking CAP status fields, or syncing a CAP preamble Status with the corresponding entry in core/README.md.

Use when checking whether Stellar SDKs listed in the docs have new releases, or when code examples in docs/ may use outdated, renamed, or deprecated SDK syntax, or whether the Stellar RPC OpenRPC spec (openrpc/) matches the current stellar-rpc release. Runs…

Comprehensive best practices for the Freighter browser extension. Covers code style, architecture, security, testing, performance, error handling, i18n, messaging, git workflow, dependencies, and anti-patterns. Use when writing new features, reviewing PRs,…

Use when verifying the full solution works end-to-end — after refactoring, before PRs, or after dependency upgrades. Runs quality pipeline, validates example scripts, and executes live Stellar testnet demos for both charge and channel payment modes.

Audit backend code for security vulnerabilities — DoS vectors, query performance, connection pool exhaustion, injection, missing rate limits, and resource exhaustion