# lugassawan > Open-source publisher. Listings imported from github.com/lugassawan — credited to the original author with their license. - **Listings:** 50 - **Total installs:** 0 - **Profile:** https://agentstack.voostack.com/s/lugassawan - **Website:** https://github.com/lugassawan ## Published listings - [Principle Performance](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-performance) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-performance` Performance engineering principles — latency vs throughput, profile-before-optimize discipline, Big-O instincts for common patterns, allocation and GC pressure, data locality and cache-friendliness, N+1 queries on a list endpoint, cache-aside and write-through invalidation, TTL sizing for hot-path endpoints, stampede prevention with single-flight. Auto-load when reviewing hot-path code, choosing… - [Principle Clean Architecture](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-clean-architecture) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-clean-architecture` Clean Architecture, hexagonal architecture, ports and adapters, dependency rule, and domain-centric layering. Auto-load when designing architecture, choosing layers, discussing the dependency rule, ports, adapters, or keeping the domain free of framework code. - [Principle Solid](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-solid) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-solid` SOLID principles — SRP, OCP, LSP, ISP, DIP (single responsibility, open-closed, Liskov substitution, interface segregation, dependency inversion). Auto-load when designing classes, refactoring, reviewing object-oriented code, or discussing coupling, cohesion, abstractions, or any SOLID violation. - [Principle Product Design](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-product-design) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-product-design` UX and product design principles — Nielsen's 10 usability heuristics, visual hierarchy, information architecture, interaction design patterns, design-system compliance, and responsive layout. Accessibility/WCAG conformance is delegated to `swe-workbench:principle-accessibility`. Auto-load when reviewing UX, evaluating usability, checking interaction patterns, assessing visual hierarchy or informa… - [Language Ruby](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-language-ruby) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-language-ruby` Ruby idioms — Ruby 3.x pattern matching, blocks, procs, lambdas, Enumerable, Comparable, frozen string literals, error handling, and testing. Auto-load when working with .rb files, Gemfile, Rakefile, gemspecs, or when the user mentions Ruby, Bundler, RSpec, minitest, blocks, procs, lambdas, or pattern matching. - [Principle Design Patterns](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-design-patterns) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-design-patterns` Design patterns — Gang of Four and beyond. Strategy, factory method, observer, decorator, adapter, facade, template method, command, repository, dependency injection. Auto-load when designing class structure, refactoring toward a pattern, or evaluating whether a pattern applies. - [Principle Data Modeling](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-data-modeling) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-data-modeling` Data modeling: relational vs document vs KV vs graph selection, normalization depth, indexing strategy, hot-key avoidance, schema evolution via expand–contract, query-first design, retention and archival. Auto-load when designing schemas, choosing a storage paradigm, discussing normalization or denormalization, schema evolution, indexing strategy, hot-key avoidance, query-first design, or data re… - [Principle Testing](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-testing) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-testing` Testing strategy and architecture — test pyramid (unit / integration / e2e), test doubles taxonomy (stub / mock / spy / fake), coverage-vs-confidence, mutation testing, flaky-test triage, contract testing, property-based and characterization tests, fixtures and test data builders. Distinct from principle-tdd which covers the red-green-refactor micro-cycle. Auto-load when discussing test strategy,… - [Workflow Commit And Pr](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-workflow-commit-and-pr) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-workflow-commit-and-pr` Use when the user wants to commit staged changes or create a PR — enforces trigger-phrase discipline (preview vs commit vs ship), the [type] commit format, branch-naming check, [no ci] auto-appended on docs-only commits, draft-vs-ready PR prompt, and PR template detection. Pre-merge counterpart to workflow-cleanup-merged. - [Language Rust](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-language-rust) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-language-rust` Rust idioms — ownership, borrowing, lifetimes, error handling, traits, and iterators. Auto-load when working with .rs files, Cargo.toml, or when the user mentions Rust, cargo, ownership, borrow checker, trait, lifetime, or async Rust. - [Workflow Codebase Knowledge](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-workflow-codebase-knowledge) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-workflow-codebase-knowledge` Use to understand an unfamiliar codebase — presents architecture overview, module map, public API surfaces, and conventions as a layered mental model. Knowledge-presentation only: read-only sweep, no defect ranking, no reasoning chains. Distinct from workflow-codebase-audit (finding-oriented defect detection) and tech-writer / /swe-workbench:document (generates new prose artifacts). Ideal for onb… - [Principle Release Engineering](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-release-engineering) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-release-engineering` Release engineering: semver discipline, tag identity, rollout strategy, rollback planning, expand-contract for breaking changes, kill-switch, feature flag, release notes audience, idempotent release automation, post-release verification. Auto-load when cutting a release, planning a breaking API change, writing release notes, choosing a version bump, designing a rollback plan, using a feature flag… - [Principle Clean Code](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-clean-code) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-clean-code` Clean code, DRY, KISS, YAGNI, function length, naming, abstraction level, error handling, function argument count, Command-Query Separation, Boy Scout Rule, intent-revealing naming. Auto-load when writing functions, naming variables, reviewing code clarity, discussing comments, or debating whether to abstract. - [Principle I18n](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-i18n) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-i18n` Internationalization (i18n) & localization (l10n) principles — locale-aware date, time, number, and currency formatting, time-zone correctness (persist UTC in DB, render local), CLDR plural rules, message catalogs (ICU MessageFormat, gettext), translatable string composition (no concatenation), bidirectional & right-to-left layout, character-encoding hygiene, sortable date formats (ISO 8601). Aut… - [Workflow Codebase Audit](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-workflow-codebase-audit) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-workflow-codebase-audit` Use for cold-start, time-boxed, multi-axis audits of unfamiliar codebases — take-home assessments, post-acquisition or due-diligence reviews, inherited-service onboarding, pre-refactor tech-debt sweeps. Dispatches the auditor subagent for the broad sweep, optionally fans out to security-auditor / debugger on top findings (only when --depth=deep), and renders ranked findings with reasoning chains… - [Principle Code Review](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-code-review) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-code-review` Code review heuristics — four-axis review lens (correctness, security, design integrity, test coverage); confidence-based filtering (no finding without a concrete failure scenario); review comment tone (observation over accusation); nitpick filtering; what counts as a real finding vs linter noise. Auto-load when writing or framing a review comment, deciding whether a PR finding is worth surfacing… - [Principle Concurrency](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-concurrency) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-concurrency` Concurrency principles — race conditions, deadlock, livelock, starvation, structured concurrency, cancellation propagation, backpressure, lock-free primitives, atomics, memory models, choosing between mutex vs channel vs actor vs semaphore vs CAS. Auto-load when designing concurrent code, debugging a race condition, fixing a deadlock, propagating cancellation, choosing a synchronization primitive… - [Principle Resiliency](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-resiliency) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-resiliency` Resiliency principles — fault tolerance, resilience, partial failure, blast radius, failure domains, bulkheads, resource isolation, graceful degradation, fail-fast vs fail-soft, health checks, liveness vs readiness probes, cascading failure, gray failure, fault isolation, idempotency, idempotency keys, safe retry, deduplication, exactly-once, rate limiting, throttling, quotas, backpressure, token… - [Principle Communication](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-communication) — Skill · Free — `agentstack add skill-lugassawan-swe-workbench-principle-communication` Caveman output mode — ultra-terse brief replies with fewer tokens. Strips filler, hedging, pleasantries. Three levels — caveman lite (default), caveman full, ultra caveman / max caveman (maximum compression). Persists until normal mode. Auto-load when the user requests terser output, says "be brief", "less tokens", "caveman mode", "use fewer tokens", or invokes `/caveman`. - [Principle Accessibility](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-accessibility) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-accessibility` Accessibility (a11y) principles — WCAG 2.2 AA conformance, semantic HTML, ARIA roles/properties/states, keyboard navigation, focus management, focus traps, color contrast, alt text, screen reader compatibility, accessible names, landmark regions, reduced motion. Auto-load when reviewing frontend or UI code, evaluating ARIA usage, designing keyboard interaction, auditing color contrast, writing al… - [Workflow Branch Sync](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-workflow-branch-sync) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-workflow-branch-sync` Sync the current branch with the default branch via rimba or git, then resolve conflicts file by file with a per-hunk rationale and a keep-mine / keep-main / manual recommendation before staging. Push only happens after explicit confirmation — never automatic. - [Workflow Delegated Implementation](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-workflow-delegated-implementation) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-workflow-delegated-implementation` Phase-2 delegation protocol for workflow-development — conditional scope/complexity gate, file-change grouping by commit-taxonomy axis (Infrastructure/Core logic/Tests/Wiring), dispatch to code-impl with a structured brief (goal, file_set, verify_cmd), summary-only result consumption (re-read prevention), sequential-default with opt-in worktree-isolated parallelism. Distinct from superpowers:suba… - [Workflow Address Feedback](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-workflow-address-feedback) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-workflow-address-feedback` Use when a PR owner wants to address review feedback — fetches outstanding threads and general comments, presents a per-item triage (ADDRESSED / CLARIFIED / DEFERRED), applies fixes via the Edit tool, commits via workflow-commit-and-pr, posts replies via the GitHub API, resolves addressed threads via GraphQL resolveReviewThread (those without a thread are never resolved), and syncs stale PR metad… - [Ticket Context](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-ticket-context) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-ticket-context` Fetch ticket context from Jira (PROJ-123), Confluence, or GitHub (`#NNN`). Auto-loads on ticket references. Returns title, summary, acceptance criteria, links, and recent activity. - [Principle Observability](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-observability) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-observability` Observability principles — logs vs metrics vs traces, structured logging, distributed tracing, span/trace context, cardinality control, OpenTelemetry, SLI/SLO/SLA, RED method, USE method, alerting on symptoms vs causes. Auto-load when adding logging, choosing a metric, instrumenting distributed tracing, debating cardinality, defining SLIs/SLOs, designing alerts, or discussing observability budget… - [Language Kotlin](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-language-kotlin) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-language-kotlin` Kotlin idioms — null safety, coroutines, sealed interfaces, scope functions, and Flow. Auto-load when working with .kt files, build.gradle.kts, or when the user mentions Kotlin, coroutines, suspend, StateFlow, sealed interface, or Kotlin DSL. - [Language Bash](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-language-bash) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-language-bash` Bash idioms — strict mode, quoting, parameter expansion, arrays, pipefail, trap cleanup, idempotency, heredocs, and POSIX portability. Auto-load when working with .sh, .bash files, or when the user mentions bash, shell, sh, shellcheck, set -e, or pipefail. - [Principle Distributed Systems](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-distributed-systems) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-distributed-systems` Distributed systems principles — CAP, PACELC, consistency models (linearizable, causal, eventual, read-your-writes), consensus (Paxos, Raft), quorum, leader election, split-brain, replication, partitioning, gossip, logical clocks (Lamport, vector, hybrid), clock skew, delivery semantics (at-most-once, at-least-once, exactly-once effects), idempotency across nodes, two-generals problem, fallacies… - [Language Java](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-language-java) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-language-java` Java idioms — records, sealed types, virtual threads, streams, and JDK 21+ patterns. Auto-load when working with .java files, pom.xml, build.gradle, or when the user mentions Java, JVM, Spring, Maven, Gradle, records, sealed classes, or virtual threads. - [Principle Event Driven](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-event-driven) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-event-driven` Event-driven architecture — event sourcing, CQRS, sagas, choreography vs orchestration, schema evolution, consumer groups, partitions, ordering, idempotent handlers, outbox pattern, dead letter queues. Auto-load when designing event-driven systems, evaluating event sourcing or CQRS, planning saga workflows, evolving event schemas across consumers, configuring consumer groups or partitions, implem… - [Language Sql](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-language-sql) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-language-sql` SQL idioms — query tuning, EXPLAIN plans, table definitions, constraints, indexes, transactions, window functions, CTEs, and pagination. Auto-load when working with .sql files or migrations, or when the user mentions SQL syntax, SELECT, JOIN, EXPLAIN, CTE, window functions, transaction isolation, deadlocks, or SQL indexes. - [Principle Postmortem](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-postmortem) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-postmortem` Postmortem principles — blameless culture, root cause analysis (5 Whys, Fishbone), incident document structure, action-item discipline, MTTD/MTTR metrics. Auto-load when running a blameless review, structuring an incident report, facilitating RCA, tracking action items after an outage, or improving incident response processes. - [Workflow Cleanup Merged](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-workflow-cleanup-merged) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-workflow-cleanup-merged` Use after a PR has been merged on GitHub to remove the local worktree, delete the local branch, delete the remote branch, and fast-forward local main — safely, with squash-merge support. - [Workflow Dependency Upgrade](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-workflow-dependency-upgrade) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-workflow-dependency-upgrade` Use when walking the dependency-upgrade lifecycle — routine sweep, Dependabot/Renovate PR triage, CVE patch, or major-version migration. Structured runbook: triage+batch → bump regen lockfile → build/test → breakage-triage → PR hygiene. Per-ecosystem command matrix; composes principle-security. Keywords: dependency upgrade bump lockfile Dependabot Renovate semver CVE supply-chain breakage - [Language Swift](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-language-swift) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-language-swift` Swift idioms — optionals, value types, actors, async/await, protocols, and Result builders. Auto-load when working with .swift files, Package.swift, or when the user mentions Swift, SwiftUI, actors, async/await, Sendable, Result builders, or Swift Package Manager. - [Workflow Bug Triage](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-workflow-bug-triage) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-workflow-bug-triage` Use when investigating a bug to root-cause and FILE a GitHub issue rather than fixing immediately — counterpart to /swe-workbench:debug (which patches). Enforces the Iron Law (no patches without root cause), runs a 4-phase loop (Investigation, Pattern Analysis, Hypothesis, File issue), and produces a structured issue with code-path table and impact assessment. - [Principle Ddd](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-ddd) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-ddd` Domain-Driven Design (DDD) — bounded contexts, aggregates, entities, value objects, ubiquitous language, domain events, context map, anti-corruption layer, and repository pattern. Auto-load when modeling a complex domain, splitting services, deciding service boundaries, microservice splits, designing aggregates, or aligning code with business language. - [Language Csharp](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-language-csharp) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-language-csharp` C# and .NET idioms — .NET 8 LTS, csproj, C# NRT, records, value semantics, switch expressions, async/await, Task, ValueTask, CancellationToken, ConfigureAwait, dependency injection, IOptions, LINQ, Span, ArrayPool, hot path, allocation profiling, and performance. Auto-load when working with .cs files, .csproj, .sln, Directory.Build.props, or when the user mentions C#, dotnet, .NET 8, C# NRT… - [Principle Error Handling](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-error-handling) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-error-handling` Error handling principles — errors as values vs exceptions, error classification (transient/permanent/programmer), wrapping and context chains, sentinel vs typed vs coded errors, retry with exponential backoff and jitter, timeouts and deadlines, circuit breakers and bulkheads, log-once boundary discipline. Auto-load when discussing errors as values, Result type, exception handling, retry, exponen… - [Principle Api Design](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-api-design) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-api-design` API design principles — contract-first thinking, semantic versioning, idempotency keys, pagination (offset vs cursor), error shape consistency, evolvability and backward compatibility, REST vs RPC vs event-driven trade-offs, hypermedia, resource modeling, deprecation strategy. Auto-load when designing an API, choosing REST or RPC or events, adding api versioning, designing idempotent endpoints, a… - [Principle Security](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-security) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-security` Security design principles — trust boundaries and input validation, authentication vs authorization, secrets and credentials handling, secure defaults and defense in depth, lightweight threat modeling, cryptography hygiene, attack-surface minimization, RBAC/ABAC authorization models, OAuth 2.0/OIDC token validation, PII and data privacy, supply-chain integrity (SBOM, provenance). Auto-load when d… - [Principle Refactoring](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-refactoring) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-refactoring` Refactoring discipline — Fowler's catalog of behavior-preserving moves (Extract Function, Inline Variable, Move Function, Replace Conditional with Polymorphism, Introduce Parameter Object, Extract Class), the smell→move mapping (Long Method, Large Class, Feature Envy, Data Clumps, Primitive Obsession, Shotgun Surgery, Divergent Change, Speculative Generality), the rule of three, characterization-… - [Principle Tdd](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-tdd) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-tdd` Test-Driven Development (TDD) — red-green-refactor, test-first, spec first, Arrange-Act-Assert, F.I.R.S.T. principles; writing tests before code; making tests fast and isolated; test doubles (mock, stub, fake, spy), mocking-as-design-feedback, outside-in vs inside-out TDD. Auto-load when implementing a feature TDD-style, fixing a bug with tests, discussing test strategy, reviewing test quality, o… - [Principle Version Control](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-version-control) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-version-control` Version control & collaboration hygiene — atomic commits (one logical change), commit-message quality (imperative subject, body explains why), branching strategy (feature-branch vs trunk-based), rebase vs merge trade-offs, squash vs preserve history, PR description quality (what/why/how-to-test). Auto-load when discussing commit hygiene, writing commit messages, choosing a branching strategy, deb… - [Workflow Audit Emit Issues](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-workflow-audit-emit-issues) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-workflow-audit-emit-issues` After a codebase audit, groups audit findings by subsystem (path prefix) and emits them as context-rich GitHub issues with template discovery, label selection, and a batch preview-confirm gate before filing. Keywords: audit findings grouped github issues subsystem emit. - [Language Typescript](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-language-typescript) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-language-typescript` TypeScript and JavaScript idioms — strict mode, type safety, discriminated unions, async patterns, and Node. Auto-load when working with .ts, .tsx, .js, .jsx files, package.json, or when the user mentions TypeScript, JavaScript, Node, type safety, or tsconfig. - [Principle Cost Awareness](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-principle-cost-awareness) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-principle-cost-awareness` Cost awareness principles — FinOps mindset, egress and data-movement charges, right-sizing, scale-to-zero, cost-per-request model, storage tier selection, observability cost, cardinality explosion, log volume. Auto-load when reasoning about cloud costs, egress topology, right-sizing instances, scale-to-zero trade-offs, storage tier selection, log sampling, or FinOps budget constraints. - [Language Python](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-language-python) — Skill · Free — `agentstack add skill-lugassawan-swe-workbench-language-python` Python idioms — PEP 8, type hints, dataclasses, context managers, generators, asyncio, and testing. Auto-load when working with .py files, pyproject.toml, requirements.txt, or when the user mentions Python, pytest, asyncio, dataclass, type hints, or virtualenv. - [Language Dart](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-language-dart) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-language-dart` Dart idioms — null safety, async/await, Futures and Streams, widget composition, and Riverpod/Bloc app architecture. Auto-load when working with .dart files, pubspec.yaml, or when the user mentions Dart, Flutter, widgets, Riverpod, Bloc, Streams, or null safety. - [Language Go](https://agentstack.voostack.com/l/skill-lugassawan-swe-workbench-language-go) — Skill · Free · security-reviewed — `agentstack add skill-lugassawan-swe-workbench-language-go` Go idioms — error handling, concurrency, and standard library usage. Auto-load when working with .go files, go.mod, go.sum, or when the user mentions Go, Golang, goroutines, channels, interfaces, context, or error wrapping. --- Seller on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Install any with `agentstack add `.