Skill Codex
Read-only review of a non-empty comment delta. Flags narration with evidence, names what it deliberately kept, and reports removed rationale. Use when the user asks to check comments or a finished diff's pre-gate found added, modified, or deleted comments; skip automatic routing when no comment changed.
Skill Codex
Read-only review of a finished UI change against the codegraph — a component with no confirmed renderer, a props contract changed without its callers, a reinvented component, or a raw value where the design system has a token. Use after implementing React or Vue work; triggers "review this UI change", "check the…
Skill Codex
Read-only review of whether the tests in a finished change actually prove its behaviour — changed code no test reaches, a test exercising a different path than the one that changed, an assertion edited to match the new output, and a suite that ran nothing. Use after implementation, and whenever a change claims to be…
Skill Codex
Strip AI-slop comments from code — keep only comments that explain a why the code can't say itself, delete anything that just restates it. Use when writing or editing code (especially as an executor applying a spec) or reviewing a diff for comment noise. Triggers — "stop adding comments", "no slop comments", "too many…
Skill Codex
Investigate unknown bugs with an explicit hypothesis ledger and evidence-driven probes before drafting a task spec. Triggers on unexplained failures, ambiguous test failures, regressions, or bug reports without a supported root cause.
Skill Codex
Turn a design handoff into a task contract that can actually be checked — named source, resolved components, token names instead of raw values, and an explicit list of what stays unverifiable. Use when a Figma frame, mockup, or design spec is handed over for implementation.
Skill Codex
Rewrite a request for a different agent or reusable prompt while preserving the original intent verbatim. Use when the user explicitly asks to improve/rewrite a prompt, or immediately before handing a genuinely rough request to a cold agent that will not see the original conversation. Do not activate merely because…
Skill Codex
Perform a portable, evidence-based security review of agent workflows, MCP tools, permissions, untrusted-input paths, audit controls, and supply-chain boundaries. Use for explicit security review or security-sensitive scope; add OWASP mapping only when requested.
Skill Codex
Enumerate what a change can reach and what enforces it — privileged operations and their callers, guards and the sites that apply them, and every module that reads a secret — before designing an auth, permission, or secrets change. Feeds the security review; produces a population and a gap list, never a verdict.
Skill Codex
Turn "I opened it and it looks fine" into recorded evidence — accessibility tree over screenshot, console and network errors as mechanical failures, viewport and colour-scheme checks as a checklist, and anything unchecked marked unchecked. Use after implementing a UI change in a client that can drive a browser.
Skill Codex
Review a proposed or existing architecture against the real runtime path, source-of-truth ownership, retry and idempotency behavior, and backward-compatibility constraints. Use for service boundaries, async workflows, persistence changes, external integrations, migrations, public APIs, events, schemas, or designs…
Skill Codex
Generate, verify, sign, or explain Mastermind audit envelopes and GitHub attestations. Use when checking audit-bundle tampering, validating exact repository/baseline/head policy, working with detached Ed25519 signatures, reviewing CI provenance, or distinguishing content integrity from signer authenticity and policy…
Skill Codex
Produce an evidence-backed change-impact brief with mastermind impact or mmcgchangeimpact. Use before editing, during implementation planning, or in PR review to trace changed symbols, callers, component/API crossings, collision risk, and likely affected consumers since a git ref.
Skill Codex
Use mmcg before Bash or literal search for repository orientation, natural-language symbol discovery, symbol existence, callers, callees, imports, blast radius, file existence, or stale-index handling.
Skill Codex
Ground a UI change in the codegraph before writing it — find whether the component already exists, who renders it, and what its props contract is. Use before creating or changing any React or Vue component; triggers "add a component", "change these props", "build this screen", or a Figma frame handed over for…
Skill Codex
Stress-test a proposed design, task spec, implementation plan, or executor report for false assumptions, broken contracts, scope creep, missing evidence, and high-risk failure modes. Use before drafting sensitive specs, before approving a plan, or when a critic/auditor needs a compact review rubric.
Skill Codex
Install portable Mastermind workflow adapters and configure, inspect, update, or remove MCP registration for Claude Code, Cursor, Codex, Continue, or an explicit generic config. Use when a user asks to install Mastermind in an AI coding client, choose project/user scope, preview a safe config change, troubleshoot…
Skill Codex
Convert a PRD, ticket, or feature request into a task contract that can fail — behaviour split from outcome, product nouns resolved to symbols that exist, unspecified cases surfaced as questions, and success metrics parked where a merge gate cannot wave them through. Use when product writing is handed over for…
Skill Codex
Retrieve and reason from durable project decisions, failed approaches, audits, reports, and lessons without treating provenance, search rank, or user approval as technical proof. Use when asking why a design exists, whether an approach was tried, what supersedes an older decision, what prior evidence should constrain…
Skill Codex
Build an evidence-backed architecture briefing with mastermind map or mmcgmap. Use when exploring an unfamiliar repository, identifying components and entry points, choosing a reading order, inspecting dependency cycles or hotspots, or explaining codegraph precision and truncation limits.
Skill Codex
Gather who already depends on a service, handler, or state owner before changing it, and name the runtime gaps the codegraph cannot span. Use before designing a change to an API, queue consumer, background job, migration, or shared state; it feeds the architecture review rather than replacing it.
Skill Codex
Produce or consume the canonical file-backed Mastermind executor report parsed by run-task --post-only. Use for executor evidence, schema-v1 report validation, controller audit inputs, or strict auditor advisory output.
Skill Codex
Draft a grounded, reviewable portrait of how the author develops from attributed code and commit evidence. Keep it as a persona candidate until the author verifies the source examples. Use for "deep style", "design patterns", or "qualitative profile" requests.
Skill Codex
Execute an approved Mastermind task contract within Scope, prove its Acceptance Criteria, and write the canonical file-backed executor report. Use when the user hands off a .mastermind/tasks/ - /spec.md or explicitly asks to execute an approved Mastermind task.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: