Skill Claude CodeCodex
Use when adding a new deck-aware AI feature (DeckFeatures axis) and its companion policies (TacticalPolicy + optional MulliganPolicy) to phase-ai. Codifies the structural-detection pattern, AST-type locations, parts-based predicate convention, registry wiring sites, and recurring review traps so a new feature ships in…
Skill Claude CodeCodex
Use when modifying the card data pipeline — adding new fields to card exports, changing Oracle parser output shape, updating card database loading, modifying the coverage report, adding synthesis functions, or debugging why a card's data looks wrong at runtime.
Skill Claude CodeCodex
Use when adding a new effect, mechanic, or parser capability to the engine. Covers the full lifecycle from types → parser → resolver → targeting → frontend → AI → tests.
Skill Claude CodeCodex
Runnable checklist gate for any proposed engine enum variant addition. Routes the proposal through the parameterization filter, the categorical-boundary check, and the existence verification before extension is permitted. Invoke this skill BEFORE proposing or implementing any new variant on QuantityRef, QuantityExpr…
Skill Claude CodeCodex
Use when adding or modifying frontend UI components — interactive overlays for WaitingFor states, game board elements, card choice modals, animation effects, or any React component that interfaces with the engine via GameAction dispatch.
Skill Claude CodeCodex
Use when adding any effect or ability that requires player input mid-resolution — choices, selections, modal decisions, or any WaitingFor/GameAction round-trip. Covers the continuation pattern, engine handler wiring, AI legal actions, multiplayer routing, and frontend UI.
Skill Claude CodeCodex
Use when adding or modifying keyword abilities — evergreen keywords (flying, trample), parameterized keywords (ward {2}, kicker {R}), protection variants, or any keyword that needs runtime behavior wired into combat, targeting, damage, or triggers.
Skill Claude CodeCodex
Use when adding or modifying replacement effects — ETB-tapped, shock lands, damage prevention, "as enters" choices, or any event-modifying ability. Covers ReplacementDefinition wiring, the pipeline flow, post-replacement effects, and interactive pre-zone-change choices.
Skill Claude CodeCodex
Use when adding or modifying static abilities, continuous effects, or layer system modifications — type-changing effects, power/toughness modification, keyword granting, color changes, CDAs, or any "as long as" / "enchanted creature" / "creatures you control" ability.
Skill Claude CodeCodex
Use when adding or modifying triggered abilities — ETB, dies, attacks, damage dealt, spell cast, phase-based, or any "When/Whenever/At the beginning of" ability. Covers TriggerDefinition, TriggerMode, the matcher registry, APNAP ordering, targeting, intervening-if, constraints, and parser wiring.
Skill Claude CodeCodex
Use when running AI-vs-AI duel simulations, validating AI matchup quality, checking combat or spellcasting regressions, tuning ai-duel CLI options, or interpreting batch simulation results.
Skill Claude CodeCodex
Semantic audit of card-data.json — compare parsed JSON structures against Oracle text to find misparses in cards the coverage system marks as "supported." Supports --after for parallel agent runs and appends to a shared report.
Skill Claude CodeCodex
Use when implementing multiple unimplemented mechanics in batch. Creates an agent team that groups items by relevance, plans each group with review loops, then executes sequentially with post-implementation verification. Append the list of mechanics to address after invoking.
Skill Claude CodeCodex
Use when classifying a Phase bug report against a specific card's engine-authoritative parsedetails. The primary job is validating that a card CLAIMS to support the misbehaving clause and then comparing the parsed AST against the Oracle text to confirm or refute that claim. Unsupported clauses are already known gaps…
Skill Claude CodeCodex
Use when triaging Phase Discord bug reports, syncing reports into triage artifacts, creating or updating GitHub issues, tracking bug clusters, or applying the repository's bug-fix review workflow.
Skill Claude CodeCodex
Canonical recipe for writing engine cast-pipeline tests. Use GameScenario + GameRunner::cast(...).resolve() and assert via CastOutcome deltas. Covers the six test-harness foot-guns (hand-written TargetRef vectors, incomplete modal target submission, wrong-point hand baseline, inline-keyword cards, AST-internal flag…
Skill Claude CodeCodex
Use when modifying the casting flow, stack resolution, condition systems, WaitingFor/GameAction state machine, or adding optional costs, new casting steps, or conditional ability resolution.
Skill Claude CodeCodex
Generate a Discord-ready "What's New" changelog for phase.rs from recent git history. Use when Codex is asked for a changelog, release notes, Discord update, recent shipped changes, or the next sequential changelog batch from a prior tip hash.
Skill Claude CodeCodex
End-to-end phase.rs implementation pipeline: plan, review-plan, implement, review-impl, commit — each step run in a fresh spawned agent, with automatic phase decomposition for oversized workloads.
Skill Claude CodeCodex
Produce an architecturally idiomatic implementation plan for a phase.rs parser or engine change. Design for the class of cards, not the single card. Use this when you need a plan that will survive /review-engine-plan without bandaids or workarounds.
Skill Claude CodeCodex
Use when doing any parser work — adding new Oracle text patterns, verb forms, phrase helpers, target patterns, subject handling, effect chain composition, fixing Unimplemented fallbacks, or understanding the parser architecture. This is the SINGLE SOURCE OF TRUTH for all oracle parser knowledge. Covers the nom…
Skill Claude CodeCodex
Fast-iteration loop for quick parser wins — surface near-miss cards via parser-gap-analyzer's typed category classifier, edit in batches, compile once per batch (not per card), defer the full gate (fmt/clippy/test-all/coverage/semantic-audit) to session end. Companion to unlock-set; use this when the fix is "add a…
Skill Claude CodeCodex
Use when asked to handle, harden, or shepherd one or more external contributor PRs. Checks out PRs in a worktree or main workspace, updates them against origin/main, resolves review comments, performs architecture-focused implementation review, decides whether fixes are inline or require engine-implementer review…
Skill Claude CodeCodex
Use to run a continuous review sweep over open contributor PRs in phase.rs. The skill is a thin orchestration layer over scripts/prreview.py: discover candidates, detect stale reviews/follow-ups, dispatch review-impl for PRs that need judgment, and delegate authorized merge handling to pr-contribution-handler.