github · ArthurAdrianoMM · Jul 4, 2026
@@ -0,0 +1,31 @@
+---
+name: 'api-resilience-engineer'
+description: 'API resilience specialist for rate limiting, retries with backoff, timeouts, circuit breakers, and bulkheads - keeping services stable under load and partial failure'
+tools: ['codebase', 'edit/editFiles', 'search', 'runCommands', 'terminalCommand']
+---
+
+# API Resilience Engineer
+
+You are an API resilience engineer. You make services degrade gracefully under load spikes, dependency failures, and abusive clients instead of falling over.
+
+## Core Expertise
+
+- **Rate limiting & throttling**: algorithm selection, per-key strategies, 429 semantics, quota tiers
+- **Retries**: exponential backoff with jitter, retry budgets, idempotency keys, when NOT to retry (non-idempotent writes, 4xx)
+- **Timeouts**: end-to-end deadline propagation; connect vs. read timeouts; sane defaults over infinite waits
+- **Circuit breakers**: closed/open/half-open tuning, fallbacks, failure-rate vs. slow-call thresholds
+- **Bulkheads & load shedding**: connection pool isolation, queue bounds, rejecting early when saturated
+
+## Working Method
+
+1. Map the call chain first: who calls whom, with what timeout, and what happens on failure at each hop.
+2. Hunt for the classic outage recipes: retries without jitter (thundering herd), timeout longer than the caller's, retry on non-idempotent POST, unbounded queues.
+3. Apply patterns with the platform's native tools before adding libraries: Resilience4j (Java), Polly / Microsoft.Extensions.Resilience (.NET), cockatiel/p-retry (Node), tenacity (Python), or service-mesh policies (Istio/Envoy).
+4. Pair every resilience mechanism with an observable signal: breaker state metrics, retry counters, 429 rates.
+5. Validate with a failure scenario: "if the database hangs for 30s, what does the user see?"
+
+## Response Style
+
+- Provide complete, idiomatic configuration/code for the user's stack, with each threshold justified in one line.
+- Present trade-offs briefly (e.g., burst tolerance vs. strict fairness) and recommend one option.
+- Call out any existing code that actively harms resilience before adding new machinery.
@@ -36,6 +36,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-agents) for guidelines on how to
 | [Ai Team Qa](../agents/ai-team-qa.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fai-team-qa.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fai-team-qa.agent.md) | AI QA engineer agent (Ivy). Use when: testing features, running E2E tests, playtesting, filing bug reports, writing test automation, creating QA sign-off documents, or verifying bug fixes. Reports bugs as GitHub Issues. |  |
 | [Amplitude Experiment Implementation](../agents/amplitude-experiment-implementation.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Famplitude-experiment-implementation.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Famplitude-experiment-implementation.agent.md) | This custom agent uses Amplitude's MCP tools to deploy new experiments inside of Amplitude, enabling seamless variant testing capabilities and rollout of product features. |  |
 | [API Architect](../agents/api-architect.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fapi-architect.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fapi-architect.agent.md) | Your role is that of an API architect. Help mentor the engineer by providing guidance, support, and working code. |  |
+| [Api Resilience Engineer](../agents/api-resilience-engineer.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fapi-resilience-engineer.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fapi-resilience-engineer.agent.md) | API resilience specialist for rate limiting, retries with backoff, timeouts, circuit breakers, and bulkheads - keeping services stable under load and partial failure |  |
 | [Apify Integration Expert](../agents/apify-integration-expert.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fapify-integration-expert.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fapify-integration-expert.agent.md) | Expert agent for integrating Apify Actors into codebases. Handles Actor selection, workflow design, implementation across JavaScript/TypeScript and Python, testing, and production-ready deployment. | [apify](https://github.com/mcp/com.apify/apify-mcp-server)<br />[![Install MCP](https://img.shields.io/badge/Install-VS_Code-0098FF?style=flat-square)](https://aka.ms/awesome-copilot/install/mcp-vscode?name=apify&config=%7B%22url%22%3A%22https%3A%2F%2Fmcp.apify.com%22%2C%22headers%22%3A%7B%22Authorization%22%3A%22Bearer%20%24APIFY_TOKEN%22%2C%22Content-Type%22%3A%22application%2Fjson%22%7D%7D)<br />[![Install MCP](https://img.shields.io/badge/Install-VS_Code_Insiders-24bfa5?style=flat-square)](https://aka.ms/awesome-copilot/install/mcp-vscodeinsiders?name=apify&config=%7B%22url%22%3A%22https%3A%2F%2Fmcp.apify.com%22%2C%22headers%22%3A%7B%22Authorization%22%3A%22Bearer%20%24APIFY_TOKEN%22%2C%22Content-Type%22%3A%22application%2Fjson%22%7D%7D)<br />[![Install MCP](https://img.shields.io/badge/Install-Visual_Studio-C16FDE?style=flat-square)](https://aka.ms/awesome-copilot/install/mcp-visualstudio/mcp-install?%7B%22url%22%3A%22https%3A%2F%2Fmcp.apify.com%22%2C%22headers%22%3A%7B%22Authorization%22%3A%22Bearer%20%24APIFY_TOKEN%22%2C%22Content-Type%22%3A%22application%2Fjson%22%7D%7D) |
 | [Arch Linux Expert](../agents/arch-linux-expert.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Farch-linux-expert.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Farch-linux-expert.agent.md) | Arch Linux specialist focused on pacman, rolling-release maintenance, and Arch-centric system administration workflows. |  |
 | [Arm Migration Agent](../agents/arm-migration.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Farm-migration.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Farm-migration.agent.md) | Arm Cloud Migration Assistant accelerates moving x86 workloads to Arm infrastructure. It scans the repository for architecture assumptions, portability issues, container base image and dependency incompatibilities, and recommends Arm-optimized changes. It can drive multi-arch container builds, validate performance, and guide optimization, enabling smooth cross-platform deployment directly inside GitHub. | custom-mcp<br />[![Install MCP](https://img.shields.io/badge/Install-VS_Code-0098FF?style=flat-square)](https://aka.ms/awesome-copilot/install/mcp-vscode?name=custom-mcp&config=%7B%22command%22%3A%22docker%22%2C%22args%22%3A%5B%22run%22%2C%22--rm%22%2C%22-i%22%2C%22-v%22%2C%22%2524%257B%257B%2520github.workspace%2520%257D%257D%253A%252Fworkspace%22%2C%22--name%22%2C%22arm-mcp%22%2C%22armlimited%252Farm-mcp%253Alatest%22%5D%2C%22env%22%3A%7B%7D%7D)<br />[![Install MCP](https://img.shields.io/badge/Install-VS_Code_Insiders-24bfa5?style=flat-square)](https://aka.ms/awesome-copilot/install/mcp-vscodeinsiders?name=custom-mcp&config=%7B%22command%22%3A%22docker%22%2C%22args%22%3A%5B%22run%22%2C%22--rm%22%2C%22-i%22%2C%22-v%22%2C%22%2524%257B%257B%2520github.workspace%2520%257D%257D%253A%252Fworkspace%22%2C%22--name%22%2C%22arm-mcp%22%2C%22armlimited%252Farm-mcp%253Alatest%22%5D%2C%22env%22%3A%7B%7D%7D)<br />[![Install MCP](https://img.shields.io/badge/Install-Visual_Studio-C16FDE?style=flat-square)](https://aka.ms/awesome-copilot/install/mcp-visualstudio/mcp-install?%7B%22command%22%3A%22docker%22%2C%22args%22%3A%5B%22run%22%2C%22--rm%22%2C%22-i%22%2C%22-v%22%2C%22%2524%257B%257B%2520github.workspace%2520%257D%257D%253A%252Fworkspace%22%2C%22--name%22%2C%22arm-mcp%22%2C%22armlimited%252Farm-mcp%253Alatest%22%5D%2C%22env%22%3A%7B%7D%7D) |

@@ -309,6 +309,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-skills) for guidelines on how to
 | [qdrant-version-upgrade](../skills/qdrant-version-upgrade/SKILL.md)<br />`gh skills install github/awesome-copilot qdrant-version-upgrade` | Guidance on how to upgrade your Qdrant version without interrupting the availability of your application and ensuring data integrity. | None |
 | [quality-playbook](../skills/quality-playbook/SKILL.md)<br />`gh skills install github/awesome-copilot quality-playbook` | Run a complete quality engineering audit on any codebase. Derives behavioral requirements from the code, generates spec-traced functional tests, runs a three-pass code review with regression tests, executes a multi-model spec audit (Council of Three), and produces a consolidated bug report with TDD-verified patches. Finds the 35% of real defects that structural code review alone cannot catch. Works with any language. Trigger on 'quality playbook', 'spec audit', 'Council of Three', 'fitness-to-purpose', or 'coverage theater'. | `LICENSE.txt`<br />`agents`<br />`phase_prompts`<br />`quality_gate.py`<br />`references/challenge_gate.md`<br />`references/code-only-mode.md`<br />`references/constitution.md`<br />`references/defensive_patterns.md`<br />`references/exploration_patterns.md`<br />`references/functional_tests.md`<br />`references/iteration.md`<br />`references/orchestrator_protocol.md`<br />`references/requirements_pipeline.md`<br />`references/requirements_refinement.md`<br />`references/requirements_review.md`<br />`references/review_protocols.md`<br />`references/run_state_schema.md`<br />`references/schema_mapping.md`<br />`references/spec_audit.md`<br />`references/verification.md` |
 | [quasi-coder](../skills/quasi-coder/SKILL.md)<br />`gh skills install github/awesome-copilot quasi-coder` | Expert 10x engineer skill for interpreting and implementing code from shorthand, quasi-code, and natural language descriptions. Use when collaborators provide incomplete code snippets, pseudo-code, or descriptions with potential typos or incorrect terminology. Excels at translating non-technical or semi-technical descriptions into production-quality code. | None |
+| [rate-limiting-implementation-guide](../skills/rate-limiting-implementation-guide/SKILL.md)<br />`gh skills install github/awesome-copilot rate-limiting-implementation-guide` | Implement rate limiting for APIs with the right algorithm, storage backend, and HTTP semantics. Use when the user asks to add rate limiting or throttling to an API, protect endpoints from abuse or brute force, return 429 responses correctly, or choose between token bucket, sliding window, and fixed window strategies. | None |
 | [react-audit-grep-patterns](../skills/react-audit-grep-patterns/SKILL.md)<br />`gh skills install github/awesome-copilot react-audit-grep-patterns` | Provides the complete, verified grep scan command library for auditing React codebases before a React 18.3.1 or React 19 upgrade. Use this skill whenever running a migration audit - for both the react18-auditor and react19-auditor agents. Contains every grep pattern needed to find deprecated APIs, removed APIs, unsafe lifecycle methods, batching vulnerabilities, test file issues, dependency conflicts, and React 19 specific removals. Always use this skill when writing audit scan commands - do not rely on memory for grep syntax, especially for the multi-line async setState patterns which require context flags. | `references/dep-scans.md`<br />`references/react18-scans.md`<br />`references/react19-scans.md`<br />`references/test-scans.md` |
 | [react-container-presentation-component](../skills/react-container-presentation-component/SKILL.md)<br />`gh skills install github/awesome-copilot react-container-presentation-component` | Create a React component using the Container/Presentation pattern in src/components by asking for the component name and type (ui or features), then scaffold files that follow this repository's TypeScript, Storybook, and SCSS conventions. Use when the user explicitly asks for a Container/Presentation-based component or runs /react-container-presentation-component. | `references/component-architecture.md`<br />`references/typescript-and-scss-rules.md` |
 | [react18-batching-patterns](../skills/react18-batching-patterns/SKILL.md)<br />`gh skills install github/awesome-copilot react18-batching-patterns` | Provides exact patterns for diagnosing and fixing automatic batching regressions in React 18 class components. Use this skill whenever a class component has multiple setState calls in an async method, inside setTimeout, inside a Promise .then() or .catch(), or in a native event handler. Use it before writing any flushSync call - the decision tree here prevents unnecessary flushSync overuse. Also use this skill when fixing test failures caused by intermediate state assertions that break after React 18 upgrade. | `references/batching-categories.md`<br />`references/flushSync-guide.md` |