The audit fanned out finders, then one verifier per finding x up to 2 lenses, plus a critic round, bounded only by the runtime's min(16, cpu-2) cap — enough agents in flight at once to trip Claude API rate limits (429s). Added a global concurrency gate (MAX_PARALLEL, default 6) and a gAgent() wrapper; routed every spawn point (gates, finders, dedup, verify lenses, critic, follow-up finders) through it. Control flow and parallel() barriers unchanged; total agent count unchanged (~40-80) — only how many run at once is bounded, so they proceed in waves. MAX_PARALLEL documented as a tunable (not 1-2). go-live-audit 1.1.0.
@ulpi/skills
Skills for AI coding agents. Works with skills.sh — install with one command, works across Claude Code, Cursor, Cline, Windsurf, and 15+ other agents.
npx skills add https://github.com/ulpi-io/skills
Or install individual skills:
npx skills add https://github.com/ulpi-io/skills --skill browse
Skills
| Skill | What it does |
|---|---|
| browse | Headless browser CLI — 76+ commands, ref-based interaction, 13x fewer tokens than @playwright/mcp |
| browse-stealth | Stealth browsing via camoufox runtime — Turnstile, Google, DataDome bypass with proxy rotation |
| browse-config | Guided camoufox profile generator — stealth, Google-safe, fast-scrape, or custom presets |
| browse-seo | On-page SEO audit — meta tags, headings, schema, Core Web Vitals, mobile rendering |
| browse-aeo | Answer Engine Optimization — page audit + SERP analysis for AI Overviews and Perplexity |
| browse-geo | Generative Engine Optimization monitoring — brand/domain visibility across AI search |
| codemap | Code search + architecture analysis — hybrid vector/BM25, dependency graphs, PageRank |
| plan-to-task-list-with-dag | Decompose features into parallel-ready task DAGs |
| map-project | Generate CLAUDE.md from codebase scan |
| map-project-monorepo | Per-package CLAUDE.md for monorepos |
| cost-estimate | Estimate dev cost of repo, branch, or commit |
| pr-retro | Branch retrospective with merge readiness verdict |
| branch-review-before-pr | Structural review — race conditions, trust boundaries |
| find-bugs | Security audit + bug finding on branch diff |
| go-live-audit | Pre-launch audit — multi-agent workflow: gates, dimension finders, adversarial verify, critic |
| ship-playbook | Prompt → planned, built, reviewed, audited — chains plan/review/build/audit skills as one looping Workflow |
| bugfix | Fix bugs with red-green workflow — reproducer, root cause, minimal fix, regression tests |
| code-simplify | Review code for reuse, quality, efficiency |
| frontend-design-ui-ux | UI/UX design specs and component briefs |
| update-claude-learnings | Extract behavioral learnings to CLAUDE.md |
| update-agent-learnings | Propagate learnings to agent files |
| update-skill-learnings | Propagate learnings to skill files |
| start | Session init — discover skills, select agent persona |
| commit | Smart conventional commits, pre-commit checks, secret scanning |
| create-pr | Auto-generate PR title/body, push, create via gh |
| git-merge-expert | Merge branches, resolve conflicts, rollback |
| git-merge-expert-worktree | Isolated merges in git worktrees |
| plan-founder-review | Technical founder review of a plan before execution |
| run-parallel-agents-feature-build | Orchestrate parallel agents for feature building |
| run-parallel-agents-feature-debug | Orchestrate parallel agents for debugging |
| update-claude-settings | Detect tech stack, generate Claude Code permissions |
| ast-grep | Structural code search via AST patterns |
| claude-review | Independent self-review via Claude agent in worktree isolation |
| codex-review | Independent AI review via OpenAI Codex CLI — second opinion on your changes |
| kiro-review | Independent AI review via Kiro CLI — second opinion on your changes |
| hand-over-to-kiro | Delegate an implementation task to the Kiro CLI — injection-safe handoff, verified diff (credit: @thabti) |
| find-agents | Find, install, and manage AI agents across 43+ IDEs |
| secrets | Credential management — encrypted vault, CLI injection, MCP shim |
| build-dmg | Build distributable DMG installers for macOS Xcode projects |
| lokei | Local dev proxy — named HTTPS domains on .test with valid TLS |
| nextjs | Next.js 16 App Router reference — Cache Components, i18n, data layer, atomic components |
| laravel | Laravel 12 API framework — Actions pattern, AI SDK, Boost, MCP, Filament, Horizon, Pest |
| laravel-filament | Filament v5 admin panel — resources, schemas, tables, actions, widgets, v3-to-v5 migration |
| rust | Rust systems programming — storage engines, SIMD, pgwire, DataFusion, tantivy, HNSW, arenas |
browse
npx skills add https://github.com/ulpi-io/skills --skill browse
Give AI agents a real browser — without flooding the context with HTML.
A persistent headless Chromium daemon that stays running between commands. The agent navigates, clicks, fills forms, takes screenshots, and reads page content through simple CLI commands — each returning minimal, structured output instead of dumping raw HTML or full accessibility trees.
browse goto https://www.mumzworld.com # → "Navigated to ... (200)" (11 tokens)
browse snapshot -i # → interactive elements with @refs
browse fill @e3 "strollers" # → "Filled @e3" (15 tokens)
browse click @e5 # → "Clicked @e5" (15 tokens)
Why not @playwright/mcp? Playwright MCP dumps ~16K tokens on every action. browse returns a one-liner. Over a 10-step session: 12K tokens vs 146K — 13x less context burned. 76+ commands, ref-based interaction, cursor-interactive detection, 150+ device emulation, multi-agent sessions, persistent profiles, React DevTools, command recording, cookie import from real browsers.
Requires: npm install -g @ulpi/browse | Full docs →
browse-stealth
npx skills add https://github.com/ulpi-io/skills --skill browse-stealth
Stealth browsing for sites that block normal browsers.
Same workflow as browse — navigate, inspect, interact, report — but with the camoufox runtime (anti-detection Firefox with C++-level fingerprint spoofing). Passes Cloudflare Turnstile, Google "unusual traffic", DataDome, and PerimeterX checks. Supports named camoufox profiles, persistent authenticated sessions, and per-region proxy rotation.
Requires: npm install -g @ulpi/browse + npm install camoufox-js && npx camoufox-js fetch
browse-config
npx skills add https://github.com/ulpi-io/skills --skill browse-config
Guided camoufox profile generator.
Asks the user questions to build a browse.json camoufox section or a named profile JSON for .browse/camoufox-profiles/. Presets: stealth (geoip + humanize), Google-safe (geoip + humanize + random OS), fast-scrape (blocks images/WebRTC/WebGL, cache on), or custom walkthrough covering identity, privacy, performance, network, behavior, and advanced Firefox prefs.
Requires: npm install -g @ulpi/browse
browse-seo
npx skills add https://github.com/ulpi-io/skills --skill browse-seo
On-page SEO audit via the browse CLI.
Extracts meta tags, heading hierarchy, structured data, navigation timing, link structure, and mobile rendering. Runs targeted JS checks for alt tags, hreflang, and lazy-loaded images. Produces a ranked report with pass/warning/fail per section and prioritized fixes. Switches to camoufox automatically when targets return 403 or a challenge page.
Requires: npm install -g @ulpi/browse
browse-aeo
npx skills add https://github.com/ulpi-io/skills --skill browse-aeo
Answer Engine Optimization — page audit and AI-SERP analysis.
Two modes. Page Audit scores a URL on a 0-100 scale across structured data, meta quality, heading structure, answer readiness, and authority signals — flagging FAQ/HowTo/Article schema gaps that feed AI answers. SERP Analysis checks how a query surfaces in Google AI Overviews and Perplexity, identifying cited domains, featured snippets, and People Also Ask targets. Uses camoufox for anti-bot bypass.
Requires: npm install -g @ulpi/browse + npm install camoufox-js && npx camoufox-js fetch
browse-geo
npx skills add https://github.com/ulpi-io/skills --skill browse-geo
Generative Engine Optimization monitoring across AI search.
Runs multi-query sweeps against Google AI Overviews, Perplexity, and ChatGPT Search (authenticated). Records citation presence, position, context, and competing domains per query. Compiles a visibility matrix with per-engine visibility rate, best-performing queries, gap queries, and top competing domains. Uses camoufox for Google and a persistent browser profile for ChatGPT.
Requires: npm install -g @ulpi/browse + npm install camoufox-js && npx camoufox-js fetch + ChatGPT Plus/Team account for ChatGPT Search.
codemap
npx skills add https://github.com/ulpi-io/skills --skill codemap
Code search and architecture analysis that understands your codebase.
Hybrid vector + BM25 search, dependency graphs, PageRank importance scoring, coupling metrics, circular dependency detection. CLI or MCP.
codemap search "error handling" # → semantic + keyword search
codemap deps src/server.ts # → what this file imports
codemap rank # → most important files by PageRank
codemap cycles # → circular dependency detection
Requires: npm install -g @ulpi/codemap | MCP: claude mcp add codemap codemap serve
plan-to-task-list-with-dag
npx skills add https://github.com/ulpi-io/skills --skill plan-to-task-list-with-dag
Decompose features into parallel-ready task DAGs.
Explores the codebase, challenges scope with the user, breaks features into atomic tasks with dependency mapping, priority assignment, and agent matching. Outputs machine-parseable markdown + JSON for parallel agent execution.
map-project
npx skills add https://github.com/ulpi-io/skills --skill map-project
Generate CLAUDE.md from a codebase scan.
Scans the project and produces a context file with exports, architecture, dev guide, and project-specific patterns. Keeps the AI context map current after each session or refactor. Supports Laravel, Next.js, NestJS, Expo/React Native, Node.js.
map-project-monorepo
npx skills add https://github.com/ulpi-io/skills --skill map-project-monorepo
Per-package CLAUDE.md for monorepos.
Same as map-project but generates a focused CLAUDE.md for each subdirectory — exports, key files, dependencies, conventions. Each package gets its own self-contained context file.
cost-estimate
npx skills add https://github.com/ulpi-io/skills --skill cost-estimate
Estimate development cost of a codebase, branch, or commit.
Analyzes LOC, git history, complexity metrics, and generates a cost report. Supports scoping by full repo, branch diff, or single commit.
pr-retro
npx skills add https://github.com/ulpi-io/skills --skill pr-retro
Branch retrospective before merging.
Analyzes all commits on the branch: size metrics, test LOC ratio, focus score, session analysis, commit hygiene, self-review scan (TODOs, debug artifacts, secrets). Delivers a merge readiness verdict — GREEN / YELLOW / RED.
branch-review-before-pr
npx skills add https://github.com/ulpi-io/skills --skill branch-review-before-pr
Pre-landing structural review.
Catches issues tests don't: race conditions, trust boundary violations, query safety, conditional side effects. Critical findings block shipping.
find-bugs
npx skills add https://github.com/ulpi-io/skills --skill find-bugs
Security audit + bug finding on branch diff.
Analyzes full diff against main, maps attack surfaces, runs security checklist against every changed file, verifies findings against context. Prioritized output.
go-live-audit
npx skills add https://github.com/ulpi-io/skills --skill go-live-audit
Launch-readiness audit of an entire repo — authored fresh for each project.
Generates a project-tailored multi-agent audit workflow from a bundled template and runs it via the Workflow tool: build/test/lint/typecheck gates in parallel, one read-only finder per applicable audit dimension (picked from a 20+ dimension catalog — authz, multi-tenancy, injection, data-loss, money-math, concurrency, supply-chain, …), agent-based dedup, adversarial verifiers that try to refute every finding (blockers get a code lens + spec lens), and a completeness critic that spawns follow-up finders for uncovered areas. Ends with a GO / NO-GO / GO-WITH-FIXES verdict. Typically 40–80 agents — for a quick branch-diff review use find-bugs instead.
ship-playbook
npx skills add https://github.com/ulpi-io/skills --skill ship-playbook
One feature prompt → planned, built, reviewed, and audited — end to end.
The delivery capstone: it chains the repo's own skills into a single runnable 14-step Workflow and loops on any findings until the gates are genuinely clean. It asks two questions up front — which second harness cross-reviews (claude / codex / kiro / none) and whether to run a go-live audit — then runs: plan (plan-to-task-list-with-dag, assigning a specialist engineer + reviewer + stack skill per task) → plan review (plan-founder-review, looped to APPROVE, optionally with a second harness) → build (per task across the DAG layers: specialist engineer in an isolated worktree → in-workflow git merge → matched -reviewer → bounded fix loop) → implementation review (native ∥ harness) → go-live audit (composes go-live-audit inline) → bounded recursion that re-plans and re-runs on confirmed findings. On exhaustion it escalates honestly rather than faking a clean verdict. Explicit-user-only; spawns many agents over multiple rounds.
bugfix
npx skills add https://github.com/ulpi-io/skills --skill bugfix
Fix bugs with surgical precision — red-green workflow enforced.
Parses findings from /find-bugs or user reports, writes a failing test that reproduces the bug before any fix code, traces root cause through data-flow analysis, implements the minimal fix, and verifies no regressions. Includes bug-type-specific playbooks (security, logic, async, null safety, race conditions) and framework-specific references for 18 frameworks: Express, React, Next.js, Fastify, Hono, Remix, Laravel, Go, Gin, Echo, Fiber, Swift, Bun, Rust, Axum, Actix Web, Rocket, React Native.
code-simplify
npx skills add https://github.com/ulpi-io/skills --skill code-simplify
Review code for reuse, quality, and efficiency.
Analyzes changed code for unnecessary complexity, duplication, and missed reuse opportunities. Fixes issues it finds.
frontend-design-ui-ux
npx skills add https://github.com/ulpi-io/skills --skill frontend-design-ui-ux
UI/UX design methodology for implementation-ready specs.
Produces component briefs, design tokens, and user flow specifications for handoff to engineering agents. For designing new features, creating design systems, or specifying component behavior.
update-claude-learnings
npx skills add https://github.com/ulpi-io/skills --skill update-claude-learnings
Extract behavioral learnings to CLAUDE.md.
After a session reveals patterns or project-specific instructions, this skill adds them to the project's CLAUDE.md so future sessions benefit.
update-agent-learnings
npx skills add https://github.com/ulpi-io/skills --skill update-agent-learnings
Propagate learnings to agent files.
Extracts insights from a session and routes them to the right agent files based on scope — global (all subagents), Claude Code only, or agent-specific.
update-skill-learnings
npx skills add https://github.com/ulpi-io/skills --skill update-skill-learnings
Propagate learnings to skill files.
When a session reveals patterns about structuring skills, this skill updates the central skill learnings file and syncs to appropriate skills.
start
npx skills add https://github.com/ulpi-io/skills --skill start
Session init — discover skills, select agent persona.
Mandatory first skill for any conversation. Discovers available skills, invokes the right ones, selects the correct specialized agent persona for the task domain, and establishes required workflows before coding begins.
commit
npx skills add https://github.com/ulpi-io/skills --skill commit
Smart conventional commits with quality gates.
Analyzes diffs deeply to draft intelligent commit messages, detects scope from branch names and file paths, runs pre-commit checks (TypeScript, ESLint, Prettier), scans for secrets and debug artifacts, splits unrelated changes into separate commits.
create-pr
npx skills add https://github.com/ulpi-io/skills --skill create-pr
Auto-generate and submit pull requests.
Validates branch state, analyzes all commits since divergence, runs pre-PR quality checks, generates structured PR title and body with summary/test-plan/breaking-changes sections, pushes branch, creates PR via gh CLI.
git-merge-expert
npx skills add https://github.com/ulpi-io/skills --skill git-merge-expert
Merge branches and resolve conflicts.
Expert in merge strategies, conflict resolution, PR readiness checks, rollback, and GitHub workflow automation. Handles rebases, cherry-picks, and complex multi-branch merges.
git-merge-expert-worktree
npx skills add https://github.com/ulpi-io/skills --skill git-merge-expert-worktree
Isolated merges in git worktrees.
Same merge expertise but in isolated worktrees — worktree lifecycle management, parallel worktree operations, and cleanup automation. For when you need merge isolation without touching the working directory.
plan-founder-review
npx skills add https://github.com/ulpi-io/skills --skill plan-founder-review
Technical founder review of a plan before execution.
Reads a plan from .ulpi/plans/<name>.md, verifies file paths exist, challenges scope and architecture decisions, audits risk coverage and test gaps, scores sections, and delivers a verdict — APPROVE / REVISE / REJECT. Quality gate between planning and execution.
run-parallel-agents-feature-build
npx skills add https://github.com/ulpi-io/skills --skill run-parallel-agents-feature-build
Orchestrate parallel agents for feature building.
Detects independent tasks, matches each to the right specialized agent, and launches them concurrently via the Agent tool with isolation: "worktree" for safe parallel file modifications. Verifies independence, prepares complete briefs, aggregates results, and checks for conflicts. Integrates with codemap for codebase understanding and browse sessions for parallel web work.
run-parallel-agents-feature-debug
npx skills add https://github.com/ulpi-io/skills --skill run-parallel-agents-feature-debug
Orchestrate parallel agents for debugging.
Clusters independent bugs by subsystem, verifies no shared root cause or cascading failures, matches each problem to the right expert agent, and launches concurrent debugging sessions. Uses codemap deps in briefs so agents understand impact radius. Aggregates fixes and validates no conflicts.
update-claude-settings
npx skills add https://github.com/ulpi-io/skills --skill update-claude-settings
Detect tech stack, generate Claude Code permissions.
Analyzes the repository to detect languages, package managers, frameworks, services, and monorepo structure. Generates .claude/settings.local.json with correct permissions for the detected stack — including @ulpi tools (browse, codemap) when installed. Only includes commands for tools actually detected. Suggests MCP servers for detected services.
ast-grep
npx skills add https://github.com/ulpi-io/skills --skill ast-grep
Structural code search via AST patterns.
Find code by structure, not text. Search for async functions without error handling, specific API call patterns, missing guards, or any structural pattern that grep can't express. Guides the agent through writing, testing, and validating ast-grep rules with stopBy: end discipline, --debug-query for AST inspection, and proper shell escaping. Requires ast-grep CLI.
find-agents
npx skills add https://github.com/ulpi-io/skills --skill find-agents
Find, install, and manage AI agents across 43+ coding IDEs.
Full CLI wrapper for agentshq — the package manager for AI coding agents. Search the registry, install agents from GitHub repos or URLs, list/remove/update installed agents. Agents are automatically translated to each IDE's native format on install.
npx agentshq find <query> # → search for agents by keyword
npx agentshq add <owner>/<repo> # → install agents from a GitHub repo
npx agentshq list # → list installed agents
npx agentshq update # → update all agents to latest
secrets
npx skills add https://github.com/ulpi-io/skills --skill secrets
Credential management for AI coding agents.
Encrypted local vault that stores API keys, tokens, and credentials. Injects them transparently into CLI tools and MCP servers. Auto-detects agents and writes hooks + MCP entries.
secrets add github --token ghp_your_token # → store credentials
secrets enable github # → enable MCP server in .mcp.json
secrets init # → auto-detect agents, write hooks
secrets status # → overview of vault, hooks, agents
Built-in services: github, anthropic, openai, aws, slack, jira, google-cloud, vercel, stripe, linear
codex-review
npx skills add https://github.com/ulpi-io/skills --skill codex-review
Independent AI review via OpenAI Codex CLI.
Get a second opinion on code changes. Analyzes the diff, builds focused review instructions, runs codex review with sandbox permissions, parses prioritized findings, and supports iterative multi-round reviews. Use for cross-review before merging or when you want a rival AI to verify Claude's work.
Requires: codex CLI + OpenAI API key
claude-review
npx skills add https://github.com/ulpi-io/skills --skill claude-review
Independent self-review via Claude agent in worktree isolation.
Spawns a separate Claude Code agent in a read-only worktree to review code changes. Builds focused review prompts from the actual diff, parses prioritized findings, and supports iterative multi-round reviews. Part of the review trifecta alongside /codex-review and /kiro-review. No external dependencies — uses Claude's built-in Agent tool.
kiro-review
npx skills add https://github.com/ulpi-io/skills --skill kiro-review
Independent AI review via Kiro CLI.
Get a second opinion on code changes using Amazon's Kiro. Analyzes the diff, builds focused review prompts, runs kiro-cli chat in non-interactive mode with full tool access, parses prioritized findings, and supports iterative multi-round reviews. Use for cross-review before merging or when you want a rival AI to verify Claude's work.
Requires: kiro-cli + logged in (kiro-cli login)
hand-over-to-kiro
npx skills add https://github.com/ulpi-io/skills --skill hand-over-to-kiro
Delegate an implementation task to the Kiro CLI — and get a verified report back.
Hand a plan or a task to Amazon's Kiro to build (the write-side counterpart to /kiro-review). Claude gathers context, builds a self-contained, injection-safe prompt (written to a temp file, never interpolated into the shell; user input rephrased and wrapped in boundary tags), runs kiro-cli with tool-trust opt-in (no --trust-all-tools unless you ask), then verifies the result against git diff and reports files changed, errors, and what's left. Used by /ship-playbook as its kiro build handoff.
Credit: original skill by Sabeur Thabti (@thabti), MIT — adapted to the @ulpi/skills conventions.
Requires: kiro-cli + logged in (kiro-cli login)
build-dmg
npx skills add https://github.com/ulpi-io/skills --skill build-dmg
Build distributable DMG installers for macOS Xcode projects.
Auto-detects app name, scheme, project/workspace, and team ID from project files. Handles archiving, code signing, DMG creation with styled Finder window, and version management. Supports xcodegen projects and optional ExportOptions.plist configuration.
Requires: Xcode command-line tools
lokei
npx skills add https://github.com/ulpi-io/skills --skill lokei
Local dev proxy — named HTTPS domains on .test with valid TLS.
Auto-detects 30+ frameworks (Next.js, Vite, Rails, Django, etc.) and injects correct port/host flags. Creates local HTTPS domains (e.g., https://myapp.test) with valid TLS certificates signed by a local CA. Supports public tunnel sharing, Docker Compose integration, traffic inspection, and multi-service orchestration via .test.yaml.
lokei run # → auto-detect framework, assign https://project.test
lokei run npm run dev # → explicit command
lokei share # → public tunnel URL
lokei doctor # → verify setup
Requires: npm i -g lokei && lokei setup
nextjs
npx skills add https://github.com/ulpi-io/skills --skill nextjs
Next.js 16 App Router reference for AI coding agents.
Comprehensive framework skill covering Cache Components, proxy.ts API-backed data layer, multilingual-first with next-intl, atomic components, structured logging, and analytics tracking. Enforces strict conventions: all strings via t(), components max 150 lines, pages max 300 lines. Includes 19 reference files for stack overview, folder structure, components, pages, data fetching, forms, caching, i18n, error handling, logging, analytics, testing, auth, security, SEO, and accessibility.
laravel
npx skills add https://github.com/ulpi-io/skills --skill laravel
Laravel 12 API framework reference for AI coding agents.
Comprehensive API-only framework skill enforcing thin controllers, Actions pattern for business logic, Form Requests for validation, API Resources for responses, and Eloquent strict mode. Covers the full Laravel AI ecosystem: AI SDK (agents, embeddings, image/audio generation, vector search, streaming), Boost (AI-assisted development with MCP tools and guidelines), and MCP (exposing your app to external AI clients). Includes 22 reference files for stack overview, folder structure, routing, controllers, validation, Eloquent models, API resources, service layer, auth, database, error handling, logging, caching, queues/jobs, testing, security, API docs, observability, Filament admin, Docker, notifications, file storage, scheduling, AI SDK, Boost, and MCP.
laravel-filament
npx skills add https://github.com/ulpi-io/skills --skill laravel-filament
Filament v5 admin panel reference for AI coding agents.
Dedicated skill for building Filament v5 admin panels with correct v5 namespaces, extracted schema/table classes, and unified action imports. Covers the critical v3-to-v5 migration (unified Filament\Actions namespace, ->recordActions() replacing ->actions(), Schemas\Components replacing Forms\Components for layout, BadgeColumn removal). Includes 12 reference files for namespace mapping, resources, forms, tables, actions, filters, relationships, widgets, panels/navigation, notifications, testing, and infolists.
rust
npx skills add https://github.com/ulpi-io/skills --skill rust
Rust systems programming reference for AI coding agents.
Comprehensive skill for building high-performance Rust systems — database storage engines, custom binary formats, wire protocols, query execution, search, and vector indexes. Covers WAL/mmap/MVCC storage with pluggable backends, zero-copy binary formats (BMAP, BARR, packed decimal), DataFusion/Arrow SQL execution with custom table providers and UDFs, pgwire and MySQL wire protocol servers with full ORM compatibility, tantivy full-text search with HNSW vector indexing and SIMD distance functions, arena-allocated graph engines with traversal algorithms, R-tree geospatial with bi-temporal time-travel, tokio async patterns with io_uring and lock-free concurrency, proptest property testing, and unsafe Rust patterns for mmap/SIMD/FFI. Includes 12 reference files covering stack, storage engine, binary formats, type system, DataFusion/Arrow, wire protocols, search/vector, arena/graph, geo/temporal, async/concurrency, testing, and error handling/unsafe.
.ulpi/design/: a per-brief visual identity (palette, type,…