wyrm

Goal-Achievement Assessment

Generated: 2026-03-31
Tool: go-stats-generator analyze . --skip-tests
Codebase Version: 28,050 lines of Go code (non-test) across 142 source files

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Project Context

What It Claims To Do

Wyrm is described as a “100% procedurally generated first-person open-world RPG” built in Go on Ebitengine. The README makes the following key claims:

1. Zero External Assets: “No image files, no audio files, no level data. The game compiles to a single binary that runs anywhere without external assets.”
2. 200 Features: “Wyrm targets 200 features across 20 categories”
3. Five Genre Themes: Fantasy, Sci-Fi, Horror, Cyberpunk, Post-Apocalyptic — each reshapes every player-facing system
4. Multiplayer: “Authoritative server with client-side prediction and delta compression” with “200–5000 ms latency tolerance (designed for Tor-routed connections)”
5. V-Series Integration: Import and extend 25+ generators from opd-ai/venture and rendering/networking from opd-ai/violence
6. Performance Targets: “60 FPS at 1280×720; 20 Hz server tick; <500 MB client RAM”
7. ECS Architecture: Entity-Component-System with 11+ named systems registered and operational
8. Core Gameplay: “First-person melee, ranged, and magic combat”, “crafting via material gathering”, “NPC memory, relationships”, “dynamic faction territory”

Target Audience

• Players seeking procedurally generated open-world RPG experiences
• Developers interested in deterministic PCG techniques
• The opd-ai procedural game suite ecosystem

Architecture

Layer	Packages	Responsibility
Entrypoints	cmd/client, cmd/server	Game client (Ebitengine) and authoritative server
ECS Core	pkg/engine/ecs, pkg/engine/components, pkg/engine/systems	Entity-Component-System with 54 system files
World	pkg/world/chunk, pkg/world/housing, pkg/world/persist, pkg/world/pvp	Chunk streaming, player housing, persistence, PvP zones
Rendering	pkg/rendering/raycast, pkg/rendering/texture, pkg/rendering/postprocess, pkg/rendering/sprite, pkg/rendering/lighting, pkg/rendering/particles, pkg/rendering/subtitles	First-person raycaster with procedural textures, sprites, lighting, particles, and subtitles
Procgen	pkg/procgen/adapters, pkg/procgen/city, pkg/procgen/dungeon, pkg/procgen/noise	V-Series adapters (34 files) and local generators
Audio	pkg/audio, pkg/audio/ambient, pkg/audio/music	Procedural synthesis with adaptive music
Network	pkg/network, pkg/network/federation	Client-server with federation support
Gameplay	pkg/companion, pkg/dialog, pkg/input	Companion AI, dialog trees, and key rebinding

Existing CI/Quality Gates

• CI Pipeline: .github/workflows/ci.yml implements:
  • Build verification (go build ./cmd/client, go build ./cmd/server)
  • Test with race detection (xvfb-run -a go test -race ./...)
  • Build-tag-specific tests (go test -tags=noebiten ./pkg/procgen/adapters/..., etc.)
  • Static analysis (go vet ./..., gofmt -l .)
  • Security scanning (govulncheck ./...)
  • Coverage upload to Codecov
• Build: ✅ PASSES — Both client and server build successfully
• Vet: ✅ PASSES — No static analysis issues
• Tests: ✅ PASSES — All 30 packages pass (27 with standard tests, 4 require noebiten tag)

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Goal-Achievement Summary

#	Stated Goal	Status	Evidence	Gap Description
1	Zero external assets	✅ Achieved	No PNG/WAV/OGG files in repo; procedural texture/audio in pkg/	—
2	Single binary distribution	✅ Achieved	go build ./cmd/client produces standalone executable	—
3	ECS architecture	✅ Achieved	pkg/engine/ecs/ with World, Entity, Component, System; 54 system files	—
4	Five genre themes	✅ Achieved	Genre-specific vehicles, weather pools, textures, biomes; adapters accept genre parameter	—
5	Chunk streaming (512×512)	✅ Achieved	pkg/world/chunk/ with Manager, 3×3 window, raycaster integration	95.1% test coverage
6	First-person raycaster	✅ Achieved	pkg/rendering/raycast/ with DDA, floor/ceiling, textured walls	90.7% coverage with noebiten tag
7	Procedural textures	✅ Achieved	pkg/rendering/texture/ with noise-based generation	98.2% test coverage
8	Day/night cycle & world clock	✅ Achieved	WorldClockSystem advances time; WorldClock component	Fully implemented
9	NPC schedules	✅ Achieved	NPCScheduleSystem reads WorldClock, updates Schedule.CurrentActivity	Implemented
10	NPC memory and relationships	✅ Achieved	NPCMemorySystem with event recording, disposition tracking	Implemented
11	Faction politics	✅ Achieved	FactionPoliticsSystem with relations map, decay, kill tracking	Implemented
12	Crime system (0-5 stars)	✅ Achieved	CrimeSystem with witness LOS, bounty, wanted level decay, jail	Implemented
13	Economy system	✅ Achieved	EconomySystem with supply/demand, price fluctuation	Implemented
14	Quest system with branching	✅ Achieved	QuestSystem with stage conditions, branch locking, consequence flags	Implemented
15	Vehicle system	✅ Achieved	VehicleSystem with movement, fuel consumption; genre archetypes	Multi-file implementation
16	Weather system	✅ Achieved	WeatherSystem with genre-specific pools, transitions	Implemented
17	Procedural audio synthesis	✅ Achieved	pkg/audio/ with sine waves, ADSR envelopes	94.3% coverage
18	Adaptive music	✅ Achieved	pkg/audio/music/ with motifs, intensity states, combat detection	97.6% test coverage
19	Spatial audio	✅ Achieved	AudioSystem with distance attenuation	Implemented
20	V-Series integration	✅ Achieved	34 adapter files in pkg/procgen/adapters/ wrapping Venture generators	89.2% coverage with noebiten tag
21	City generation	✅ Achieved	pkg/procgen/city/ generates districts; server spawns NPCs	98.0% test coverage
22	Dungeon generation	✅ Achieved	pkg/procgen/dungeon/ with BSP rooms, boss areas, puzzles	92.6% test coverage
23	Melee combat	✅ Achieved	CombatSystem with melee, damage calc, cooldowns, target finding	Skill modifiers implemented
24	Ranged combat	✅ Achieved	ProjectileSystem with spawn, movement, collision detection	Implemented
25	Magic combat	✅ Achieved	MagicCombatSystem with mana, spell effects, AoE targeting	Implemented
26	Stealth system	✅ Achieved	StealthSystem with visibility, sneak, sight cones, backstab	Multi-file implementation
27	Network server	✅ Achieved	pkg/network/server.go with TCP, client tracking, message dispatch	Implemented
28	Client-side prediction	✅ Achieved	pkg/network/prediction.go with input buffer, reconciliation, Tor-mode	83.2% coverage
29	Lag compensation	✅ Achieved	pkg/network/lagcomp.go with position history ring buffer	500ms rewind window
30	Tor-mode adaptive networking	✅ Achieved	IsTorMode(), adaptive prediction window (1500ms), input rate (10Hz), blend time (300ms)	Fully implemented
31	Server federation	✅ Achieved	pkg/network/federation/ with FederationNode, gossip, transfer	90.4% coverage
32	Player housing	✅ Achieved	pkg/world/housing/ with rooms, furniture, ownership	93.0% test coverage
33	PvP zones	✅ Achieved	pkg/world/pvp/ with zone definitions, combat validation	89.4% test coverage
34	World persistence	✅ Achieved	pkg/world/persist/ with entity serialization, chunk saves	93.0% test coverage
35	Dialog system	✅ Achieved	pkg/dialog/ with topics, sentiment, responses	87.8% test coverage
36	Companion AI	✅ Achieved	pkg/companion/ with behaviors, combat roles, relationship	87.1% test coverage
37	Post-processing effects	✅ Achieved	pkg/rendering/postprocess/ with 13 effect types	100.0% test coverage
38	60 FPS target	⚠️ Partial	Benchmarks exist but runtime profiling not automated in CI	Benchmarks show 7ns/op for raycasting core
39	200–5000ms latency tolerance	✅ Achieved	Tor-mode with 800ms threshold, adaptive prediction, blend time	Full implementation
40	CI/CD pipeline	✅ Achieved	.github/workflows/ci.yml with build/test/lint/security	Fully functional
41	200 features	✅ Achieved	200/200 features marked [x] in FEATURES.md	—
42	Skill progression	✅ Achieved	SkillProgressionSystem with XP, levels, genre naming	Multi-file implementation
43	Crafting system	✅ Achieved	CraftingSystem with workbench, materials, recipes, tool durability	Implemented
44	Sprite rendering	✅ Achieved	pkg/rendering/sprite/ with generator, cache, animation	97.8% test coverage
45	Particle effects	✅ Achieved	pkg/rendering/particles/ with emitters, renderer	91.7% test coverage
46	Lighting system	✅ Achieved	pkg/rendering/lighting/ with point/spot/directional lights	95.5% test coverage
47	Subtitle system	✅ Achieved	pkg/rendering/subtitles/ with text overlay	88.4% test coverage
48	Key rebinding	✅ Achieved	pkg/input/rebind.go with config-driven mapping	98.3% coverage
49	Party system	✅ Achieved	pkg/engine/systems/party.go with invites, XP/loot sharing	Implemented
50	Player trading	✅ Achieved	pkg/engine/systems/trading.go with trade protocol, validation	Implemented

Overall: 49/50 goals fully achieved (98%), 1 partial (60 FPS requires runtime profiling), 0 missing

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Metrics Summary

Code Quality (from go-stats-generator)

Metric	Value	Assessment
Total Lines (non-test)	28,050	Substantial codebase
Total Functions	501	Well-structured
Total Methods	2,301	Method-heavy (good OO separation)
Total Structs	502	Rich type system
Total Interfaces	8	Minimal interface use
Total Packages	29	Good modularity
Source Files	142	Reasonable
Duplication Ratio	1.70% (905 lines)	✅ Below 2.0% target
Circular Dependencies	0	✅ Excellent
Average Complexity	3.5	✅ Good (target <5)
High Complexity (>10)	0 functions	✅ Excellent
Functions >50 lines	38 (1.4%)	✅ Acceptable
Documentation Coverage	87.4%	✅ Above 80% target

Top 10 Complex Functions (all below threshold)

Function	Package	Lines	Cyclomatic	Overall
StartInstallation	housing	37	7	10.1
AddParticipant	systems	35	7	10.1
CompleteContent	systems	32	7	10.1
processPlottingCoup	systems	31	7	10.1
GetUnreadBooks	systems	30	7	10.1
calculateBounds	city	27	7	10.1
GetSpotsNear	systems	23	6	9.8
processHazardEncounter	systems	23	6	9.8
carveTunnel	dungeon	21	6	9.8
applyExplosionCrater	chunk	20	6	9.8

All functions are at or below cyclomatic complexity 10.

Test Coverage by Package

Package	Coverage	Status
pkg/procgen/noise	100.0%	✅ Excellent
pkg/rendering/postprocess	100.0%	✅ Excellent
cmd/client (noebiten)	100.0%	✅ Excellent
pkg/input	98.3%	✅ Excellent
pkg/rendering/texture	98.2%	✅ Excellent
pkg/procgen/city	98.0%	✅ Excellent
pkg/rendering/sprite	97.8%	✅ Excellent
pkg/audio/music	97.6%	✅ Excellent
pkg/rendering/lighting	95.5%	✅ Excellent
pkg/world/chunk	95.1%	✅ Excellent
pkg/audio	94.3%	✅ Excellent
pkg/engine/ecs	93.8%	✅ Excellent
pkg/world/housing	93.0%	✅ Excellent
pkg/world/persist	93.0%	✅ Excellent
pkg/procgen/dungeon	92.6%	✅ Excellent
pkg/rendering/particles	91.7%	✅ Excellent
pkg/rendering/raycast (noebiten)	90.7%	✅ Excellent
pkg/audio/ambient	90.5%	✅ Good
pkg/network/federation	90.4%	✅ Good
pkg/world/pvp	89.4%	✅ Good
pkg/procgen/adapters (noebiten)	89.2%	✅ Good
pkg/rendering/subtitles	88.4%	✅ Good
pkg/dialog	87.8%	✅ Good
pkg/companion	87.1%	✅ Good
pkg/engine/components	86.0%	✅ Good
config	85.9%	✅ Good
cmd/server (noebiten)	83.8%	✅ Good
pkg/network	83.2%	✅ Good
pkg/engine/systems	78.2%	✅ Good

Average Package Coverage: 91.8% — Exceeds 70% target across all packages with tests.

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Roadmap

Priority 1: Automated Performance Benchmarking in CI

Impact: README claims “60 FPS at 1280×720” — benchmarks exist but aren’t validated automatically
Effort: Low (1-2 days)
Risk: Performance regressions could go undetected

The codebase has comprehensive benchmarks but they don’t run in CI or report against baselines.

• Add benchmark job to .github/workflows/ci.yml:

  benchmark:
    name: Benchmarks
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-go@v5
        with:
          go-version: $
      - run: go test -tags=noebiten -bench=. -benchmem ./pkg/rendering/raycast/... ./pkg/engine/ecs/... | tee bench.txt
      - uses: benchmark-action/github-action-benchmark@v1
        with:
          tool: 'go'
          output-file-path: bench.txt
  

• Add benchmark baseline comparison (fail CI if >10% regression)
• Validation: CI shows benchmark results and alerts on significant regressions

Priority 2: Reduce Code Duplication Further (1.70% → <1.5%)

Impact: 51 clone pairs / 905 duplicated lines — still 0.2% above ideal
Effort: Low (2-3 days)
Risk: Bug fixes may not propagate to all clone instances

Top duplication clusters identified by go-stats-generator:

Location	Lines	Instances	Action
pkg/input/rebind.go	21-23	4	Extract validateBinding(action, key)
config/load.go	11	3	Extract parseConfigSection(...)
pkg/engine/systems/vehicle_*.go	10-11	6	Extract applyVehiclePhysics(...)
pkg/engine/systems/party.go	10	2	Extract distributeToParty(...)
pkg/engine/systems/trading.go	10	2	Extract validateTradeItem(...)

• Extract validateBinding helper from pkg/input/rebind.go:106 and :158
• Consolidate config section parsing in config/load.go
• Extract shared vehicle physics helper across vehicle_*.go files
• Validation: go-stats-generator analyze . --skip-tests | grep "Duplication Ratio" shows <1.5%

Priority 3: Add Tests for Missing Test Packages

Impact: 4 packages show 0% coverage without build tags: cmd/client, cmd/server, pkg/procgen/adapters, pkg/rendering/raycast
Effort: Low — tests exist, build tags needed
Risk: Standard go test ./... may mislead about coverage

The tests exist for these packages but require the noebiten build tag:

• Update CI to clearly report both standard and build-tag coverage
• Add comment to README test section explaining build tag requirements
• Consider adding stub tests that run without noebiten tag for basic import verification
• Validation: Coverage report shows all packages with appropriate context

Priority 4: Address Naming Convention Violations

Impact: 23 identifier violations, 19 file violations, 1 package violation
Effort: Low-Medium (3-5 days)
Risk: API changes may affect consumers

Remaining violations:

Identifier Violations (23) — mostly in components package:

• VehiclePhysics, FactionMembership, SkillSchool, CityEventEffects, etc.
• These are acceptable since components is a collection package, not domain-specific

File Violations (19) — generic names:

• pkg/engine/systems/constants.go → could split by subsystem
• pkg/engine/components/types.go → could split by category
• pkg/procgen/adapters/constants.go → could move to respective adapter files

Package Violation (1):

• pkg/util → rename to pkg/random or inline the single function

• Rename pkg/util to pkg/random (contains only PseudoRandom function)
• Move constants from constants.go files to their related source files (37 placement suggestions)
• Validation: go-stats-generator analyze . --skip-tests | grep "Identifier Violations" shows <10

Priority 5: Improve Low-Cohesion Files

Impact: 38 low-cohesion files identified by go-stats-generator
Effort: Medium (1-2 weeks)
Risk: Lower developer productivity

Files with 0.00 cohesion score indicate unrelated functions grouped together:

File	Current Cohesion	Suggested Splits
pkg/engine/components/types.go (845 LOC)	0.00	Split by component category
pkg/procgen/adapters/constants.go	0.00	Move to respective adapter files
pkg/engine/systems/constants.go	0.00	Move to respective system files
pkg/audio/music/constants.go	0.00	Inline into adaptive.go

• Split pkg/engine/components/types.go into category-based files (position.go, combat.go, economy.go, etc.)
• Distribute constants to their usage sites
• Validation: Average file cohesion improves from 0.50 to >0.65

Priority 6: Address Oversized Packages

Impact: 2 packages identified as potentially oversized
Effort: Medium-High (2-3 weeks)
Risk: Harder to navigate and test

Package	Files	Exports	Recommendation
systems	54	1519	Consider splitting into systems/combat, systems/economy, etc.
adapters	34	314	Consider per-generator subpackages

• Evaluate splitting pkg/engine/systems/ into subdirectories (combat, economy, world, etc.)
• Document system interdependencies before refactoring
• Validation: Each subpackage has <500 exports

Priority 7: Document Architecture Decisions

Impact: Architecture is sound but not documented
Effort: Medium (1 week)
Risk: Onboarding difficulty for new contributors

• Create docs/ARCHITECTURE.md explaining:
  • ECS pattern and system registration order
  • Chunk streaming lifecycle
  • Network message flow
  • Procgen adapter pattern for V-Series integration
• Add inline architecture comments to key entry points
• Validation: New contributor can understand system flow from docs alone

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Dependency Health

Dependency	Version	Status
github.com/hajimehoshi/ebiten/v2	v2.9.3	✅ Current — Go 1.24+ required
github.com/opd-ai/venture	v0.0.0-20260321	✅ V-Series sibling
github.com/spf13/viper	v1.19.0	✅ Stable
golang.org/x/sync	v0.17.0	✅ Current
golang.org/x/text	v0.30.0	✅ Current
golang.org/x/image	v0.32.0	✅ Current
golang.org/x/sys	v0.37.0	✅ Current

Ebitengine v2.9 Notes:

• Requires Go 1.24+ (project uses Go 1.24.5 ✅)
• Vector graphics API improvements available
• New DrawTriangles32 APIs available for optimization if needed
• No breaking changes affecting this codebase

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Build & Test Commands

# Build (both pass)
go build ./cmd/client && go build ./cmd/server

# Test with race detection (requires xvfb for Ebiten)
xvfb-run -a go test -race ./...

# Test with build tags for headless packages
go test -tags=noebiten -cover ./pkg/procgen/adapters/...
go test -tags=noebiten -cover ./pkg/rendering/raycast/...
go test -tags=noebiten -cover ./cmd/client/...
go test -tags=noebiten -cover ./cmd/server/...

# Test with coverage
go test -cover ./...

# Static analysis
go vet ./...

# Security scan
govulncheck ./...

# Metrics
go-stats-generator analyze . --skip-tests

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Key Files Reference

File	Purpose	Lines
cmd/client/main.go	Game client entry, Ebitengine loop	~300
cmd/server/main.go	Server entry, tick loop, system registration	~140
pkg/engine/components/types.go	All component definitions	845
pkg/engine/systems/*.go	54 ECS system files	~25,000 total
pkg/world/housing/housing_guild.go	Guild hall system	1,237
pkg/audio/music/adaptive.go	Adaptive music	1,041
pkg/rendering/sprite/generator.go	Procedural sprite generation	~675
pkg/network/server.go	TCP server, client handling	~400
pkg/rendering/raycast/core.go	DDA raycaster	~385

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Summary

Wyrm is a well-architected, extensively tested procedural RPG that achieves 98% of its stated goals. The codebase demonstrates:

Strengths:

• ✅ Build and all tests pass with no errors
• ✅ Average test coverage of 91.8% across all packages
• ✅ Zero circular dependencies
• ✅ Zero high-complexity functions (all ≤10 cyclomatic)
• ✅ Low code duplication (1.70%)
• ✅ Comprehensive ECS with 54 system files
• ✅ Full V-Series integration via 34 adapter files
• ✅ Functional CI/CD pipeline with race detection, security scanning
• ✅ All 200 claimed features implemented per FEATURES.md
• ✅ Complete rendering pipeline: raycaster + sprites + lighting + particles + subtitles
• ✅ Full multiplayer stack: prediction, lag compensation, federation, Tor-mode
• ✅ Documentation coverage at 87.4%

Priority Work Items:

Priority	Item	Impact	Effort	Status
P1	Automated performance benchmarking in CI	High	Low	Not started
P2	Further reduce code duplication (→<1.5%)	Medium	Low	Not started
P3	Clarify build-tag test coverage reporting	Medium	Low	Not started
P4	Address naming convention violations	Low	Medium	Not started
P5	Improve file cohesion	Low	Medium	Not started
P6	Consider package restructuring	Low	High	Not started
P7	Document architecture decisions	Medium	Medium	Not started

The project is in excellent shape — a mature, feature-complete implementation with strong test coverage and clean architecture. The remaining work is maintenance and polish, not feature development. Compared to notable procedurally generated games like No Man’s Sky, Minecraft, and Dwarf Fortress, Wyrm demonstrates an ambitious and largely successful attempt to build a genre-spanning RPG with fully procedural content.

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Generated by go-stats-generator v1.0.0 and manual analysis Report date: 2026-03-31

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