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Use when coordinating custom Codex subagents for HOI4 mod implementation, asset production, text and audio research, audits, active small patches, planning handoffs, or documentation work.
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Use only when the selected HOI4 portrait provider is the Comfy Cloud MCP route.
Use only when the selected HOI4 portrait provider is a configured loopback ComfyUI installation.
Use only when the selected HOI4 portrait provider is an existing RunPod ComfyUI workspace.
Use when creating, sourcing, processing, converting, organizing, wiring, or documenting visual assets for a Hearts of Iron IV mod.
Use for the provider-neutral HOI4 portrait source, prompt, archive, validation, and runtime handoff contract.
Use when implementing, updating, auditing, or documenting Hearts of Iron IV events and event chains, including news and report events, on_action hooks, localisation, pictures, registration hooks, and validation.
| name | hoi4-subagents |
| description | Use when coordinating custom Codex subagents for HOI4 mod implementation, asset production, text and audio research, audits, active small patches, planning handoffs, or documentation work. |
Use this skill when a HOI4 modding task should be split across custom Codex subagents.
The parent Codex agent remains responsible for final integration, validation, and completion claims. Subagents can inspect, patch, create assets, write addenda, or produce reports. The parent must review their outputs, wire final cross-surface behavior, and carry blockers into the final report.
Capture a task baseline before patch-capable subagents begin. Assign disjoint files and serialize any work that would touch the same source.
Do not use subagents to hide uncertainty or pass off responsibility. A subagent handoff is evidence for the parent, not a replacement for parent review.
All custom Codex subagents must be spawned with fork_context=false.
Do not spawn any subagent with inherited parent-thread context. The parent prompt must include every path, user correction, task constraint, scope boundary, previous handoff status, accepted plan, queued plan, and design rule the subagent needs.
If the needed context only exists in conversation, summarize it into the subagent prompt or write it to the relevant spec, plan, handoff, or repo file before spawning. Then spawn the subagent with fork_context=false.
This rule applies to every subagent type:
The goal is to keep subagents narrow, reproducible, and grounded in explicit inputs instead of inherited conversation state.
Use hoi4_repo_explorer only for read-only repo exploration when touched-file mapping, pattern search, vanilla reference mapping, missing-file recovery, dependency mapping, or edit-order planning is actually unclear. It is not a default preflight agent.
Use hoi4_improvement_loop_planner for feature improvement loop planning, detailed expansion specs, historical and regional research notes, and implementation-ready improvement handoffs. This replaces the old mechanic-expander role. It writes plans and addenda. It does not patch gameplay files.
Use hoi4_asset_source_researcher for real or archival image sourcing, real leader, commander, operative, advisor, and officeholder portraits, historical flags, historical symbols, user-provided source photos, source-image processing, animated portrait bases, and report, news, or custom feature images that must depict real historical material.
Use hoi4_portrait_creator for every final sourced or grounded character portrait. The source researcher stops after the attributed source, exact crop, person-only prompt, durable source pair, and handoff; non-sourced fictional or impossible portraits use native ImageGen under the parent brief and never enter the ComfyUI workflow. The portrait worker uses only the provider skill named in the project configuration and never edits runtime wiring.
Use hoi4_generated_feature_art for generated non-icon art, including fictional or alternate-history report images, news images, large presentation images, custom feature images, fictional flags, faction emblems, UI panels, dossier art, progression-state base art, and animated non-icon presentation pieces. Do not route final character portraits through this worker.
Use hoi4_icon_artist for generated gameplay icon families, formable seals, scripted GUI icons, and small animated icon or button sprites. Follow hoi4-feature-assets for the exact owning UI surface and reference folder.
Use hoi4_3d_model_pipeline for bounded custom HOI4 3D model work covering provider candidates, Blender processing, model textures, rigs, skeletal actions, .mesh/.anim export, QA evidence, and runtime handoffs.
Use hoi4_quote_remark_researcher for main quotes, exact wording checks, attribution confidence, source comparison, button text, cultural remarks, slogans, allusions, and short references.
Use hoi4_audio_researcher for licensed or public-domain audio research, including presentation cues, source verification, download, .ogg conversion, and audio handoff notes.
Use hoi4_focus_tree_auditor for focus tree audits and active small patches covering branch depth, route coverage, icons, localisation, rewards, prerequisites, mutual exclusions, AI, focus-formable links, and simplification.
Use hoi4_decision_mission_auditor for decision and mission audits and active small patches covering category lifecycle, objective quality, costs, tooltips, scripted GUI decision hooks, AI behavior, cleanup, balance, and exploit risk.
Use hoi4_country_package_auditor for country package audits and active small patches covering tags, history, states, leaders, portraits, flags, parties, focus loading, ideas, advisors, units, technologies, claims, cores, localisation, AI, formables, and playable setup.
Use hoi4_localisation_auditor for localisation and scripted localisation audits and active small patches covering missing keys, duplicate keys, encoding, tooltip quality, broken dynamic text, namespace consistency, dynamic cost text, and cross-surface text mismatch.
Use hoi4_scripted_system_architect for reusable scripted system design and active narrow implementation covering scripted effects, scripted triggers, script constants, event targets, meta effects, variables, tuning values, formable helpers, scripted GUI button helpers, and dynamic helper logic.
Use hoi4_documentation_curator for documentation cleanup and consistency during long implementation. It reconciles specs, plans, docs, handoffs, manifests, prompts, reports, and README files, writes source-of-truth maps and resume packets, marks superseded docs, records plan dispositions, and flags contradictions. It patches documentation surfaces only and does not edit gameplay files, localisation, assets, external tabular data files, or workbooks unless explicitly in scope.
Use hoi4_feature_completion_auditor for read-only spec-versus-implementation audits covering events, mechanics, assets, docs, text and audio packages, focus trees, decisions, validation, and accepted plan addenda.
Use hoi4_spreadsheet_doc_worker only for mod-maintained spreadsheets, CSV exports, or workbooks when the repository actually has them or the parent explicitly requests them. It uses the spreadsheet skill and preserves the named file structure without assuming the mod has that kind of external record.
Do not route new work to obsolete planner aliases. Use hoi4_improvement_loop_planner and the hoi4-improvement-loop skill.
hoi4_repo_explorer is an optional scout for uncertain or broad work. It should save time by finding files, patterns, precedents, and edit order before the parent starts a complex implementation.
Use hoi4_repo_explorer when at least one of these is true:
Do not spawn hoi4_repo_explorer for small or already bounded work, including:
hoi4_spreadsheet_doc_workerWhen the task is small, the parent should read the known files directly and proceed. Do not use repo exploration as a ritual step or as a replacement for parent review.
Subagents should act at the level their role requires. Do not make every subagent read-only by default.
These agents do not patch gameplay files:
hoi4_repo_explorerhoi4_feature_completion_auditorThey may write reports only when a report path is provided or obvious from the task.
hoi4_improvement_loop_planner writes feature expansion specs, improvement addenda, deep research notes, historical connection notes, and implementation handoffs. It does not edit gameplay, localisation, GUI, scripted effects, focus trees, decisions, assets, external tabular data files, workbooks, or country files.
When an event mechanic needs more depth, new branches, new countries, a new formable suite, a new scripted GUI system, deeper regional logic, historical anchors, or a larger route redesign, the planner writes a plan under docs/plans/<feature_slug>/. The main agent decides what to implement.
The parent should use this planner after a meaningful implementation tranche, not after every small patch. Do not spawn it again for the same feature until its previous addendum has been implemented, folded into specs, queued with a reason, or rejected with a reason.
hoi4_documentation_curator is patch-capable for documentation surfaces only. It may update Markdown specs, docs, plans, handoffs, manifests, prompt files, README files, route coverage tables, source-of-truth ledgers, resume packets, and documentation indexes inside the current task scope.
Use it after long implementation tranches, after several subagent handoffs, before a major resume, or whenever docs may be stale, contradictory, duplicated, or too numerous. It should reduce confusion for the parent agent by recording what is current, what is superseded, what is queued, what is rejected, and what still needs a decision.
It must not edit gameplay files, localisation, scripted localisation, GUI, GFX, events, focuses, decisions, ideas, scripted effects, scripted triggers, on_actions, country setup, history, AI files, assets, audio, binary files, or external tabular data files. It does not replace hoi4_feature_completion_auditor, hoi4_localisation_auditor, hoi4_spreadsheet_doc_worker, or hoi4_repo_explorer.
Asset subagents create source files, processed previews, final DDS outputs, contact sheets, manifests, and asset handoffs. They do not wire gameplay, localisation, GFX, GUI, events, focuses, decisions, or workbooks unless the parent gives a narrow exception.
Route hoi4_3d_model_pipeline only when the feature actually needs a 3D output, with fork_context=false and a context-complete prompt containing the exact deterministic job root, reference-image path or approved asset brief, output folders, handoff path, asset profile, named vanilla references, scale relationship, required action roles, credit and paid-attempt limits, dependency lock, and forbidden simplifications.
Before spawning it, the parent must run .tools/3d_pipeline/bootstrap_3d_workflow.py if the feature needs 3D work and the concrete Meshy/Blender entries are not already present in .codex/config.toml. This keeps ordinary mods free of 3D setup while ensuring the 3D worker starts only after its routes and dependency record exist.
The parent prompt must require the MESHY_API_KEY hard gate and autonomous 3D bootstrap before path discovery or provider work, exactly one Meshy input image when no ready image exists, no multi-view provider board, immediate provider download and checksum, protected provider source, topology repair, PDX packed-material validation, hash-aware runtime synchronization, and .mesh/.anim reimport evidence. For humanoids, name the installed vanilla source mesh and entity and pass the source-height/entity-scale/effective-runtime crosswalk; for buildings, pass the valid state/province pair and entity visibility test.
The subagent owns source/reference preservation, provider candidates, downloaded GLB/FBX and lineage, Blender source and checkpoints, bounded geometry/material/rig/weight/action work, processed model textures and DDS files, .mesh/.anim exports, previews, manifests, QA/reimport evidence, crosswalk rows, and handoffs. It must not edit gameplay, GFX, .gfx, .gui, .asset, entity, localisation, events, focuses, decisions, country/history/AI, on_actions, or external records.
The parent alone owns .asset/entity/GFX/runtime source wiring, province/state placement, live-consumer and in-game validation, runtime evidence, and the overall completion claim. A successful provider task, .blend, preview, or export never authorizes the subagent to claim the feature is complete or to silently use a fallback.
These agents are patch-capable by default inside the current task scope:
hoi4_scripted_system_architecthoi4_decision_mission_auditorhoi4_focus_tree_auditorhoi4_country_package_auditorhoi4_localisation_auditorThey do not need a separate permission prompt to fix small, local issues that are clearly connected to the current feature, mechanic, country, focus tree, decision category, GUI surface, or localisation surface.
They should inspect first, then patch only when the fix is narrow, reversible, and supported by the relevant skill. They may edit files they own for the current task surface and directly related dependency files. They must not search for unrelated cleanup outside the feature they were spawned for.
Active small patches include:
Active small patches do not include:
When a patch-capable subagent sees a broad design gap, it writes a plan handoff and stops. The main agent decides whether to implement it.
Every subagent that edits files must write a handoff back to the parent. If the feature slug is known, place it under:
docs/plans/<feature_slug>/subagent_handoffs/
The handoff should include:
Do not fill handoffs with passing boilerplate checks that only restate AGENTS.md rules. Basic syntax hygiene can be done internally unless it found a problem or materially changed the patch.
When a routed task touches focus trees, event chains, technology or doctrine trees, weighted logic, scripted GUI, or maps, use MCP as the shared evidence surface. Pass only the diagnostics, revision, scenario hash, comparison, or linked artifact URI the parent needs instead of copying a complete graph or matrix into the prompt.
For probability work, name the analyzed surface and scenario ids, state whether the candidate pool and external factors were complete, and distinguish exact, bounded, sampled, score-only, and unresolved results. For technology or doctrine work, list the affected technology, folder, unlock, grant, bonus, or asset ids and include the relevant hoi4.tech_compare result when source changed.
If a patch touches localisation, list the keys changed. If it touches decisions or focuses, list affected ids. If it touches scripted helpers, list helper names and call sites. If it touches country setup, list tags and state ids or state groups.
Full accepted feature specs belong under:
docs/specs/<feature_slug>/
Subagent plans, expansion addenda, audit follow-up notes, blocked reports, implementation handoffs, and patch handoffs belong under:
docs/plans/<feature_slug>/
The plans folder is the working area. The specs folder is the source-of-truth design area. If a plan is accepted as source design, the main agent should fold it into the relevant spec file or clearly report that it remains queued.
Do not create new planning folder names such as docs/planning/ unless the user explicitly asks.
Do not use one broad asset worker for mixed visual packages.
Use:
hoi4_asset_source_researcher for real, archival, historical, documentary, or public-source images when the asset must show real historical materialhoi4_portrait_creator for every final character portrait after the source package is complete, including permitted fictional text-to-image portraitshoi4_generated_feature_art for generated non-icon fictional, alternate-history, symbolic, extreme-route, or unique event art that is not a final character portraithoi4_icon_artist for generated gameplay icon families, formable seals, decision category icons, and small animated icon or button sprites; follow hoi4-feature-assets for exact asset-family routingThe parent agent must give each asset subagent a bounded prompt with exact asset names, target sizes, source mode, final folders, sprite names when already registered, reference folders, and constraints.
For flags, the parent prompt must state whether each flag is a base flag, ideology variant, route variant, cosmetic-tag flag, historical flag, or fictional flag. Base flags for existing countries must be preserved unless explicitly in scope. Ideology variants must be distinct designs, not recolors or copied emblems. Historical flags and attested symbols belong with hoi4_asset_source_researcher. Fictional or alternate-history variants belong with hoi4_generated_feature_art.
Asset subagents may create source files, PNG previews, DDS files, contact sheets, manifests, and gfx_handoff.md. The optional portrait worker may create durable source/prompt pairs and selected-provider outputs only when the project lock enables portrait production; it never owns gameplay or runtime wiring. It must not edit .gfx, localisation, GUI, event, focus, idea, decision, script, history, country, or workbook files unless the parent explicitly expands scope. Native advisor and high-command cards follow the 65x67 compositor and independent-review contract in hoi4-feature-assets.
Use separate research agents when the text and audio package has enough work to justify it.
Use hoi4_quote_remark_researcher for quotes, exact wording, attribution confidence, button text, cultural remarks, slogans, allusions, and short references.
Use hoi4_audio_researcher for audio research, license verification, download, .ogg conversion, and audio handoff notes.
Use hoi4_asset_source_researcher, hoi4_portrait_creator, or hoi4_generated_feature_art for image work according to the source mode required by hoi4-feature-assets.
The main agent owns final wording, localisation, GUI/GFX, audio wiring, playback helpers, caller effects, docs alignment, and live validation.
Use hoi4_improvement_loop_planner when a feature or feature-adjacent mechanic needs new design material, not just an audit finding.
The planner should read hoi4-improvement-loop, hoi4-feature-planning, and relevant system skills. It should inspect actual implementation, specs, plans, docs, localisation, and asset notes when available. It should then write concrete design material that expands the feature through playable mechanics, historical or regional connections, AI behavior, and visual needs. It should not patch gameplay files.
The main agent should deploy the planner often enough to keep major features from becoming shallow after new mechanics are added, but not so often that plans pile up. For the same feature, do not deploy another planner pass until the previous addendum is implemented, promoted to specs, queued with a reason, or rejected.
Audit subagents may include compact improvement handoffs inside their reports. If a gap requires a new route family, new GUI system, new formable suite, new country package, or new event chain, they should recommend a plan-mode pass rather than trying to patch it.
hoi4_spreadsheet_doc_worker is a context-light spreadsheet or workbook worker, not a general documentation agent.
Use it only when the required output is a spreadsheet, CSV export, XLSX workbook, balancing table, route matrix, asset ledger, localisation tracking sheet, or similar table that already exists in the repository or is explicitly requested by the parent.
The parent prompt must provide the workbook or CSV path, sheet, ids, row targets, source localisation keys, or exact fields to update when possible.
The worker should read only:
It should not read HOI4 wiki pages, vanilla documentation, vanilla files, broad implementation guides, or unrelated repo systems. It should not edit docs, specs, plans, manifests, gameplay files, localisation files, assets, GFX, GUI, events, focuses, decisions, ideas, history, scripted effects, scripted triggers, or other workbooks unless the parent explicitly expands scope.
The worker must preserve workbook or CSV structure, formatting, formulas, filters, and validation unless the parent explicitly asks for structural changes.
The parent agent must review every subagent output before relying on it.
Before final completion, the parent should check:
A subagent patch can reduce workload. It never owns the final completion claim.
When the installed hoi4-super-events workflow is selected, route bounded work to hoi4_super_event_quote_researcher for quote candidates, attribution, response text, cultural fit, and copyright notes; hoi4_super_event_audio_researcher for source, license, download, verified conversion, and audio evidence; and hoi4_super_event_art_researcher for image direction, source-mode research, named-reference review, and explicitly authorized image production.
Spawn each with fork_context=false. Include the mod root, stable registration ID, presentation role, owning caller, accepted plan path, exact question, named inputs, exact outputs and handoff path, source mode or audio decision, user constraints, and forbidden files. These agents do not edit gameplay, event, GUI, GFX, localisation, scripted localisation, sound definitions, or registry files; the main agent reviews the handoff and owns final wiring and completion.