Claude Skills by lugassawan

Dart idioms — null safety, Futures and Streams, widget composition, and Riverpod app architecture. Auto-load when working with .dart files, pubspec.yaml, or when the user mentions Dart, Flutter, widgets, Riverpod, Streams, or null safety.

Ruby idioms — Ruby 3.x pattern matching, procs, Comparable, error handling, and testing. Auto-load when working with .rb files, Gemfile, Rakefile, gemspecs, or when the user mentions Ruby, blocks, procs, lambdas, or pattern matching.

Fetch production observability signals from Sentry — error, regression, and alert data. Auto-loads on Sentry references. Returns message/culprit, first-seen, always labeled as Phase-1 framing, never a profile.

UX and product design principles — Nielsen's 10 usability heuristics, visual hierarchy, 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, assessing visual hierarchy or information architecture, auditing design-system compliance, or planning user-facing features.

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.

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.

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.

Branch-based P0 incident hotfix lifecycle — skips the worktree provider, opens a ready-for-review PR immediately after a minimal hotfix, ahead of verification and review (deferred by design), stamps a deferred-verification marker in the PR body, then reconciles once a regression test lands and the suite goes green. Activated by /swe-workbench:hotfix.

Profile-first performance investigation runbook — reproduce and baseline a metric, pick a profiler from the ecosystem tooling matrix (Go/Python/JVM/Node/Rust/Ruby/.NET/native), capture CPU + alloc profiles under load, hand the profile to the performance-tuner agent for ranked hotspot read, form one hypothesis, make one isolated change, regression guard. Keywords — profile flame graph hotspot bottleneck slow endpoint investigation benchmark.

Posting core shared by workflow-pr-review (both first-pass and followup modes) and the specialist /swe-workbench:review PR-mode sub-flow — takes a normalized findings/decision/byline payload, dedupes against existing review threads (±5-line fuzzy match + Jaccard ≥ 0.4), posts new inline or PR-level comments, applies the self-review + diff-scoping decision flip, and submits APPROVE or COMMENT.

Replace the approach of a PR — weigh redesign alternatives against its current design, then reimplement or supersede after approval. Activated by /swe-workbench:design --pr.