Skill Claude CodeCodex
Load when designing, building, or reviewing ANY application that handles time — backend, database, data lake, or frontend. The universal rule: everything is UTC; only the frontend localizes. Applies to every stack, every project.
Skill Claude CodeCodex
Load when building or reviewing a FastAPI backend service — endpoints, project structure, Annotated style, return types, async/sync rules, persistence, concurrency, transactions, testing.
Skill Claude CodeCodex
Drive an hssd-governed repo as the interactive MAESTRO — run the governed engagement loop (intake → iteration → engineering loop → adversarial verification) conversationally, using Claude Code's native subagents for the AI work and the hssd CLI for state. Use whenever the user wants to drive any phase of the loop in a…
Skill Claude CodeCodex
Load when setting up or reviewing any project — Makefile as the universal command interface. Standard targets that delegate to the stack runner (uv, npm, etc.), so the developer always types make regardless of the underlying technology.
Skill Claude CodeCodex
Load when designing, building, or reviewing how data or change-events move between components — client/server, service/service, or source/system. The blessed preference: event-driven PUSH (WebSockets, SSE, pub/sub, Kafka, message queues, webhooks) over PULL (polling). Pulling is a justified exception, not a default.
Skill Claude CodeCodex
Load for any Python work — project setup, typing, async, testing, style. Base layer under fastapi and other Python skills.
Skill Claude CodeCodex
Load when designing, building, or reviewing ANY application that does I/O or calls a dependency — timeouts, retry limits, backoff, idempotency, fail-fast. Every app needs defense against hangs and infinite retries. This is the harness instinct applied to runtime.
Skill Claude CodeCodex
Behavior guards for the AC Adversary — attack all AC systematically, stress test for guarantees, always propose concrete fixes.
Skill Claude CodeCodex
Behavior guards for the Architect — simplest design that satisfies AC, every decision justified, no code, read-only.
Skill Claude CodeCodex
Behavior guards for the Architecture Adversary — tear down the design, find failure modes, always propose alternatives. Advisory, never blocking.
Skill Claude CodeCodex
Behavior guards for the Backend Dev — implement until green, own only backend files, report design gaps, never declare done without evidence.
Skill Claude CodeCodex
Behavior guards for the Completion Challenger — prove it is NOT done, compare brief × AC × what exists, PASS only when genuinely nothing is missing.
Skill Claude CodeCodex
Behavior guards for the Definition Skeptic — attack all five criteria, always propose a way forward, never approve with known gaps.
Skill Claude CodeCodex
Behavior guards for the Frontend Dev — implement UI per spec, handle all states, own only frontend files, provide demonstrable evidence.
Skill Claude CodeCodex
Behavior guards for the Independent Verifier — run every AC's covering test, never accept claims, evidence only.
Skill Claude CodeCodex
Behavior guards for the Janitor — discover and file, never fix. High-signal findings only. Stable fingerprints to prevent duplicates.
Skill Claude CodeCodex
Behavior guards for the Product Analyst — separate problem from solution, surface open questions, never invent requirements.
Skill Claude CodeCodex
Behavior guards for the Regression Hunter — run the full suite, check all callers, write characterization tests for untested callers before approving.
Skill Claude CodeCodex
Behavior guards for the Security Adversary — actively attack, not politely review. Injection, auth abuse, secret leakage, hostile input.
Skill Claude CodeCodex
Behavior guards for the Story Writer — testable AC in Gherkin, stress tests for guarantees, no happy-path-only coverage.
Skill Claude CodeCodex
Behavior guards for the Test Adversary — fire real concurrent requests, hunt vacuous tests, find races nobody saw.
Skill Claude CodeCodex
Behavior guards for the Test Author — red step is mandatory, tests must fail before implementation, one test per AC, never write production code.
Skill Claude CodeCodex
Load when designing, building, or reviewing any SQL schema or query path — index strategy for foreign keys, filter/range queries, and append-only tables that grow without bound. Index analysis is mandatory for any SQL system.
Skill Claude CodeCodex
Load when designing, building, or reviewing any Python service backed by SQLite — concurrency, transactions, upserts, single-writer ownership, atomic counters. The blessed correctness rules for FastAPI + SQLite under concurrent writes.