Use when custom Build123d Python CAD code, geometry operations, selectors, locations, joints, assemblies, imports, exports, or DFM details are needed. Read `references/dfm-rules.md` BEFORE writing the first line of geometry code for any screw boss, standoff, snap fit, wall interface, or overhang-sensitive feature — not after the shape exists. A screw fastening into a 3D-printed part additionally requires the `build123d-libs` kit; never hand-model that joint.

Patch the code so `scripts/local-checks.sh` passes, after /implement-mainspec — a narrow post-implement polish specialist. Reads the (remediation-rich) check failures, fixes the underlying cause, never silences a check, re-verifies, and commits. Invoked headless by the dispatcher's two-strike local-checks gate; the dispatcher owns the retry counter. Triggers - fix-local-checks, fix lint, fix local checks, fix typecheck, make checks pass, post-implement polish (project)

Meta skill for creating new SDD experts from domain documentation. Provide a markdown file path with domain knowledge + optional steering context. Automatically synthesizes references, generates signal scripts, validates, and registers in experts.md/signals.md catalogs. Single-prompt creation with follow-up tweaks. Triggers - create expert, new expert, make expert, expert for, domain expert, add expert (project)

Evaluate a PR the harness produced — walk the change, run the system together, and build a firm understanding before you merge it. Use after the harness hands a converged PR to you for review (the "Ready for your review" comment), or any time you want to deeply review an agent-authored PR. The human-attentive skill at the back of the chain; the mirror of /intent. Outcomes — merge, close, or fix-it-yourself-and-push - no handing work back to the loop.

Implement, refactor, review, or explain `@base-ui/react` in React applications. Use when working with Base UI components or utilities.

Implement or incrementally complete a legacy-modernization module in a target Next.js application from a canonical curated feature requirement package and its linked target implementation specification. Use when a reviewed mockup supplies the approved visual UI while curated requirements supply every backend, Oracle, validation, operation, persistence, transaction, error, and security behavior; supports POC generation with explicit known gaps without silently inventing missing behavior.

Generate high-fidelity, functional Next.js mockup screens for Oracle Forms modernization from one or more module evidence folders and linked screenshots. Use when asked to preserve legacy fields, tabs, grids, section organization, and business behavior while applying minimal web modernization; combine separate Maintain/Retrieve-style forms into a unified search, filter, add, edit, and delete experience; or extend a target Next.js application while matching its existing Reference / Products / Maintain Products visual and interaction conventions.

Comprehensive Mastra framework guide for building agents, workflows, tools, memory, workspaces, and storage with current APIs. Use for documentation lookup, API verification, TypeScript setup, common errors, migrations, and `mastra api` CLI tasks: inspect or call resources on local, Mastra platform, Trace Intelligence, or remote servers. For Mastra Factory operations, discover and activate the companion mastra-factory skill.

Use this skill when the user wants to test an API, validate endpoints, check response schemas, run API test suites, or do load testing.

Use this skill when you need Claude to return structured JSON — data extraction, classification, form parsing, or any task needing machine-readable output.

Use this skill when the user wants to draft, improve, or respond to emails — cold outreach, follow-ups, escalations, team announcements, or any professional communication.

Use this skill when the user wants to generate documentation, write docstrings, create API docs, build a README, or produce HTML/PDF documentation from code.

Validate and align the repo's validation and preflight guidance with the live command contract. Use this skill when AGENTS, README, Makefile, package scripts, validators, or preflight docs change.

Validate and align required-check names across GitHub workflows, .harness/ci-required-checks.json, harness.contract.json, and repo docs. Use this skill when CI check names or required-check policy changes.

Diagnose and classify MCP and Local Memory startup failures in this repo. Use this skill when codex mcp list, Codex startup, hook startup, mise trust, or Local Memory listener checks fail.

Validate and diagnose diagram-cli tooling-envelope drift in this repo. Use this skill when work touches docs/agents/tooling.contract.json, scripts/check-environment.sh, scripts/codex-preflight.sh, scripts/verify-work.sh, .codex/environments/environment.toml, or docs that describe local projection behavior.

Import a wiki graph into the current vault from graph.json or an OKF/markdown bundle. Use for transferring previously exported wiki content between vaults; pair with wiki-export for the reverse direction.

Archive and rebuild wiki knowledge from source, or restore a prior archive. Use for full restart/recovery when incremental repair is inappropriate; this is broader and more destructive than ordinary update or lint.

Build convincing woven cloth in Three.js, with a thread-level weave normal map, sheen and anisotropic highlights, folds that never stretch the texture, hems with thickness, stitches, seams, frayed edges, fold occlusion, dye and wear variation, and light passing through thin fabric. Use for linen, silk, wool, canvas, curtains, banners, cloaks, tablecloths, tapestries or any 3D drape that currently looks like a plastic sheet, a stretched texture, or a flat coloured plane.

NetAlertX database architecture patterns. Use this when designing features that write to the Devices table, implementing audit/history logging, or choosing between trigger-based vs Python-hook approaches.