Mmcp.market

consistency-check skill

by Donchitos·Donchitos/Claude-Code-Game-Studios·25k stars·MIT

Scan GDDs against the entity registry for cross-document conflicts. Grep-first approach targets conflicting sections, different stats.

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Install the consistency-check skill

A skill is a folder. Copy it into your agent's skills folder and the agent loads it when the task matches its description.

git clone --depth 1 https://github.com/Donchitos/Claude-Code-Game-Studios.git /tmp/Claude-Code-Game-Studios
mkdir -p ~/.claude/skills
cp -r /tmp/Claude-Code-Game-Studios/.claude/skills/consistency-check ~/.claude/skills/consistency-check
available in every project

In the Claude apps, zip the folder and upload it from the Skills settings. The folder on GitHub

The instructions your agent would load

SKILL.md as published, without the frontmatter. Read it on GitHub

!bash "${CLAUDESKILLDIR}/../../hooks/yaml-helper.sh" resolve_config --keys automation,workflow

Consistency Check

Detects cross-document inconsistencies by comparing all GDDs against the entity registry (design/registry/entities.yaml). Uses a grep-first approach: reads the registry once, then targets only the GDD sections that mention registered names — no full document reads unless a conflict needs investigation.

This skill is the write-time safety net. It catches what /design-system's per-section checks may have missed and what /review-all-gdds's holistic review catches too late.

When to run:

  • After writing each new GDD (before moving to the next system)
  • Before /review-all-gdds (so that skill starts with a clean baseline)
  • Before /create-architecture (inconsistencies poison downstream ADRs)
  • On demand: /consistency-check entity:[name] to check one entity specifically

Output: Conflict report + optional registry corrections

Every AskUserQuestion call follows .claude/docs/automation-modes.md (collaborative asks always · guided major-only · autonomous logs and proceeds; automationalwaysask categories always prompt).

workflow (see .claude/docs/workflow-modes.md):

  • full — full entity-registry cross-check against all GDD sections.
  • standard — cross-check against the required sections only.
  • minimal — not meaningful (no GDDs to check).

Phase 1: Parse Arguments and Load Registry

Modes:

  • No argument / full — check all registered entries against all GDDs
  • since-last-review — check only GDDs modified since the last review report
  • entity: — check one specific entity across all GDDs
  • item: — check one specific item across all GDDs

Load the registry:

Read path="design/registry/entities.yaml"

If the file does not exist or has no entries:

"Entity registry is empty. Run /design-system to write GDDs — the registry

is populated automatically after each GDD is completed. Nothing to check yet."

Stop and exit.

Build four lookup tables from the registry:

  • entitymap: { name → { source, attributes, referencedby } }
  • itemmap: { name → { source, valuegold, weight, ... } }
  • formulamap: { name → { source, variables, outputrange } }
  • constantmap**: { name → { source, value, unit } }

Count total registered entries. Report:

Registry loaded: [N] entities, [N] items, [N] formulas, [N] constants
Scope: [full | since-last-review | entity:name]

Phase 2: Locate In-Scope GDDs

Glob pattern="design/gdd/*.md"

Exclude: game-concept.md, systems-index.md, game-pillars.md — these are not system GDDs.

For since-last-review mode:

git log --name-only --pretty=format: -- design/gdd/ | grep "\.md$" | sort -u

Limit to GDDs modified since the most recent design/gdd/gdd-cross-review-*.md file's creation date.

Report the in-scope GDD list before scanning.

Phase 3: Grep-First Conflict Scan

For each registered entry, grep every in-scope GDD for the entry's name. Do NOT do full reads — extract only the matching lines and their immediate context (-C 3 lines).

This is the core optimization: instead of reading 10 GDDs × 400 lines each (4,000 lines), you grep 50 entity names × 10 GDDs (50 targeted searches, each returning ~10 lines on a hit).

3a: Entity Scan

For each entity in entity_map:

Grep pattern="[entity_name]" glob="design/gdd/*.md" output_mode="content" -C 3

For each GDD hit, extract the values mentioned near the entity name:

  • any numeric attributes (counts, costs, durations, ranges, rates)
  • any categorical attributes (types, tiers, categories)
  • any derived values (totals, outputs, results)
  • any other attributes registered in entity_map

Compare extracted values against the registry entry.

Conflict detection:

  • Registry says [entityname].[attribute] = [valueA]. GDD says [entityname] has [valueB]. → CONFLICT
  • Registry says [itemname].[attribute] = [valueA]. GDD says [itemname] is [valueB]. → CONFLICT
  • GDD mentions [entityname] but doesn't specify the attribute. → NOTE** (no conflict, just unverifiable)

3b: Item Scan

For each item in item_map, grep all GDDs for the item name. Extract:

  • sell price / value / gold value
  • weight
  • stack rules (stackable / non-stackable)
  • category

Compare against registry entry values.

3c: Formula Scan

For each formula in formula_map, grep all GDDs for the formula name. Extract:

  • variable names mentioned near the formula
  • output range or cap values mentioned

Compare against registry entry:

  • Different variable names → CONFLICT
  • Output range stated differently → CONFLICT

3d: Constant Scan

For each constant in constant_map, grep all GDDs for the constant name. Extract:

  • Any numeric value mentioned near the constant name

Compare against registry value:

  • Different number → CONFLICT

Phase 4: Deep Investigation (Conflicts Only)

For each conflict found in Phase 3, do a targeted full-section read of the conflicting GDD to get precise context:

Read path="design/gdd/[conflicting_gdd].md"

(Or use Grep with wider context if the file is large)

Confirm the conflict with full context. Determine:

More skills from Donchitos/Claude-Code-Game-Studios

  • AadoptBrownfield audit — do existing artifacts actually work? Numbered migration plan. Unlike /project-stage-detect, checks compliance not existence.
  • Aarchitecture-decisionCreate an ADR documenting a technical decision: context, alternatives considered, consequences.
  • Aarchitecture-reviewTraceability matrix mapping GDD requirements to ADRs. Finds gaps, cross-ADR conflicts, engine compatibility. PASS/CONCERNS/NOT ASSESSED/FAIL.
  • Aart-bibleAuthor the Art Bible — visual identity gating asset production. Run before /map-systems.
  • Aasset-auditAudit assets against naming conventions, file size budgets, format standards. Finds orphaned assets, missing references.
  • Aasset-specPer-asset visual specs plus AI generation prompts from GDDs and character profiles. After the art bible.
  • Abalance-checkFind balance outliers, broken progressions, degenerate strategies, economy imbalances in formulas and data. 'Check game balance'.
  • AbrainstormGuided concept ideation using professional studio techniques, player psychology, creative exploration.
  • Abug-reportStructured bug report from a description, or analyze code for potential bugs. Reproduction steps, severity.
  • Abug-triageRe-evaluate open bugs — priority vs severity, assign to sprints, surface systemic trends. Run when the count grows.
  • AchangelogAuto-generate a changelog from git commits and sprint data. Internal and player-facing versions.
  • Acode-reviewArchitectural code review — coding standards, SOLID, testability, performance concerns.

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