Overview

The Type Inference Debugger is an L3 Genetically Enhanced agent operating in the quality domain of the Prismatic Platform. This agent specializes in diagnosing and resolving Dialyzer type inference issues, detecting conflicting typespecs, identifying vague type declarations, and optimizing type system usage across the platform's Elixir codebase. The "Genetically Enhanced" designation indicates that this agent has undergone evolutionary optimization through the platform's genetic algorithm-based agent improvement pipeline, resulting in superior diagnostic capabilities compared to standard agents.

Dialyzer type inference issues are among the most challenging defect categories in Elixir development. Unlike compiler errors that point to a specific line, Dialyzer warnings often arise from complex type inference chains where the actual root cause is several function calls removed from the reported location. The Type Inference Debugger specializes in tracing these inference chains to their root causes, generating precise fix recommendations that resolve the underlying type conflict rather than merely suppressing the warning.

This agent is part of the platform's 434-strong autonomous agent ecosystem, maintaining the platform's zero-Dialyzer-violation standard under the NO MERCY doctrine.

Diagnostic Capabilities

Capability	Description	Complexity	Auto-Fix Rate
Inference Chain Tracing	Follow type inference from warning to root cause	High	60%
Conflicting Spec Detection	Identify specs that contradict each other	Medium	85%
Vague Type Identification	Flag overly broad type declarations	Low	95%
Success Typing Analysis	Compare declared types with inferred success types	High	50%
Contract Violation	Detect function calls that violate caller's spec	High	70%
Pattern Match Coverage	Identify patterns not covered by type declarations	Medium	80%
Opaque Type Violations	Detect improper internal structure access	Medium	75%

Dialyzer Warning Classification

The Type Inference Debugger classifies Dialyzer warnings into severity categories that guide remediation priority.

Warning Type	Severity	Example	Typical Root Cause
no_return	Critical	Function can never return normally	Infinite recursion or crash path
invalid_contract	High	Spec contradicts success typing	Incorrect `@spec` annotation
pattern_match	High	Pattern can never match	Dead code or logic error
call	Medium	Function called with wrong types	Type mismatch in caller
guard_fail	Medium	Guard clause will always fail	Logic error in guards
unused_fun	Low	Function never called	Dead code

Technical Implementation

defmodule PrismaticAgents.TypeInferenceDebugger do
  @moduledoc """
  L3 Type Inference Debugger agent (Genetically Enhanced).
  Diagnoses and resolves Dialyzer type inference issues.
  """

  use GenServer
  require Logger

  @dialyzer_check_interval_ms :timer.hours(2)

  defstruct [
    :warning_registry,
    :inference_chains,
    :fix_recommendations,
    :plt_status,
    :last_check_at,
    status: :diagnosing
  ]

  @spec start_link(keyword()) :: GenServer.on_start()
  def start_link(opts \\ []) do
    GenServer.start_link(__MODULE__, opts, name: __MODULE__)
  end

  @impl true
  def init(_opts) do
    schedule_dialyzer_check()
    {:ok, %__MODULE__{warning_registry: %{}, inference_chains: []}}
  end

  @impl true
  def handle_info(:dialyzer_check, state) do
    warnings = run_dialyzer_analysis()
    chains = trace_inference_chains(warnings)
    fixes = generate_fix_recommendations(chains)

    :telemetry.execute(
      [:prismatic, :agents, :type_inference, :check],
      %{warnings: length(warnings), chains_traced: length(chains), fixes_generated: length(fixes)},
      %{auto_fixable: Enum.count(fixes, & &1.auto_fixable)}
    )

    schedule_dialyzer_check()

    {:noreply, %{state |
      warning_registry: index_warnings(warnings),
      inference_chains: chains,
      fix_recommendations: fixes,
      last_check_at: DateTime.utc_now()
    }}
  end

  defp trace_inference_chains(warnings) do
    warnings
    |> Enum.map(fn warning ->
      %{
        warning: warning,
        chain: build_inference_chain(warning),
        root_cause: identify_root_cause(warning),
        confidence: calculate_diagnosis_confidence(warning)
      }
    end)
    |> Enum.sort_by(& &1.confidence, :desc)
  end

  defp build_inference_chain(warning) do
    initial_location = warning.location
    called_functions = extract_call_chain(initial_location)

    called_functions
    |> Enum.map(fn {module, function, arity} ->
      %{
        mfa: {module, function, arity},
        declared_type: fetch_declared_type(module, function, arity),
        inferred_type: fetch_success_typing(module, function, arity),
        conflict: detect_type_conflict(module, function, arity)
      }
    end)
  end
end

Inference Chain Resolution Strategy

The Type Inference Debugger follows a systematic resolution strategy when addressing type inference issues.

1. Collect Dialyzer warning
2. Trace inference chain from warning location
3. Identify each function in the call chain
4. Compare declared specs with success typings
5. Locate the EARLIEST point where types diverge
6. Generate fix at the root cause (not the symptom)
7. Validate fix with targeted Dialyzer re-run

Resolution Step	Tool	Expected Duration
Warning Collection	`mix dialyzer --format short`	60-120 seconds
Chain Tracing	AST analysis + PLT query	5-30 seconds per warning
Root Cause Identification	Success typing comparison	2-10 seconds per chain
Fix Generation	Pattern-matched recommendations	< 1 second per fix
Fix Validation	Targeted Dialyzer re-run	30-60 seconds per fix

Genetic Enhancement Features

The Type Inference Debugger's genetic enhancement has produced several capabilities that exceed standard agent performance.

Enhancement	Description	Improvement Over Baseline
Pattern Recognition	Recognizes recurring type conflict patterns	3x faster diagnosis
Root Cause Accuracy	Higher precision in identifying true root cause	92% vs 70% baseline
Fix Quality	Generated fixes require fewer iterations	1.2 vs 2.8 iterations
PLT Cache Strategy	Optimized PLT caching for faster analysis	40% faster Dialyzer runs

Genetic Enhancement Methodology

The "Genetically Enhanced" designation is not merely a label -- it reflects a rigorous evolutionary optimization process that the Type Inference Debugger has undergone through the platform's genetic algorithm-based agent improvement pipeline. Each generation of the agent is evaluated against a fitness function that measures diagnostic accuracy, fix quality, and resolution speed, with the fittest variants selected for the next generation.

defmodule PrismaticAgents.TypeInferenceDebugger.FitnessEvaluator do
  @moduledoc """
  Fitness evaluation for genetic enhancement of the Type Inference Debugger.
  Measures diagnostic accuracy, fix quality, and resolution speed.
  """

  @spec evaluate_fitness(map()) :: float()
  def evaluate_fitness(generation_metrics) do
    accuracy_score = generation_metrics.root_cause_accuracy * 0.40
    fix_quality = (1.0 - generation_metrics.fix_iterations / 5.0) * 0.30
    speed_score = min(1.0, 300_000 / max(generation_metrics.avg_resolution_ms, 1)) * 0.20
    coverage_score = generation_metrics.warning_types_handled / 12 * 0.10

    accuracy_score + fix_quality + speed_score + coverage_score
  end
end

Generation	Fitness Score	Root Cause Accuracy	Avg Fix Iterations	Key Improvement
Gen 1	0.42	55%	4.2	Baseline capabilities
Gen 5	0.61	70%	3.1	Pattern library initialized
Gen 10	0.78	82%	2.2	PLT cache optimization
Gen 15	0.89	89%	1.5	Inference chain tracing improved
Gen 18	0.95	92%	1.2	Current production version

Common Type Conflict Patterns

Through its genetically enhanced pattern recognition capabilities, the Type Inference Debugger has cataloged the most common type conflict patterns encountered in large-scale Elixir codebases. This pattern library enables rapid diagnosis by matching new warnings against known conflict signatures.

Pattern	Description	Frequency	Root Cause Location
Narrowing Mismatch	Spec too narrow for actual return values	25%	Function body returns unexpected variant
Protocol Confusion	Protocol dispatch type conflicts	15%	Missing protocol implementation
Callback Drift	@impl function diverges from behaviour spec	18%	Behaviour spec updated, implementations lag
Guard Contradiction	Guard clause contradicts parameter spec	12%	Spec and guard disagree on valid inputs
Opaque Leak	Internal opaque type structure accessed directly	8%	Pattern matching on opaque type internals
Union Incomplete	Return type union missing error variants	22%	New error path added without spec update

Platform Status

Metric	Current	Target
Dialyzer warnings	0	0
PLT build time	180 seconds	< 300 seconds
Warning resolution time	< 5 minutes	< 10 minutes
Auto-fix success rate	78%	> 75%
False positive rate	0%	0%

Integration Points

Quality Gates -- Dialyzer zero-warning enforcement
Telemetry Integration -- Type analysis metrics
Autonomous Self-Healing -- Auto-fix Dialyzer warnings
AIAD Standard -- Full agent specification compliance

AIAD Specification Compliance

AIAD Component	Status
Agent specification file	Compliant
Behavioral rules	14 rules defined
Telemetry integration	Full coverage
NM/ND doctrine enforcement	Active
SEADF integration	Registered
Property-based testing	42 properties verified

Type Annotation Analyst -- Typespec completeness and quality analysis
Route Testing Specialist -- Route handler type verification
Six Sigma Psycho Coordinator -- Quality enforcement for type safety

Authority Level

L3 - Strategic Command - Multi-domain coordination with authority to diagnose and resolve Dialyzer type inference issues across the entire platform.

Connect & Contribute

Created by Tomáš Korcak (korczis) | Open Source under GHL

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type-inference-debugger

Overview

Diagnostic Capabilities

Dialyzer Warning Classification

Technical Implementation

Inference Chain Resolution Strategy

Genetic Enhancement Features

Genetic Enhancement Methodology

Common Type Conflict Patterns

Platform Status

Integration Points

AIAD Specification Compliance

Authority Level

Connect & Contribute

Agent Info

Agent Distribution

Agent Domains

Related Content

Color Teams

Doctrine

OSINT Sources

type-inference-debugger

Overview

Diagnostic Capabilities

Dialyzer Warning Classification

Technical Implementation

Inference Chain Resolution Strategy

Genetic Enhancement Features

Genetic Enhancement Methodology

Common Type Conflict Patterns

Platform Status

Integration Points

AIAD Specification Compliance

Related Agents

Authority Level

Connect & Contribute

Agent Info

Agent Distribution

Agent Domains

Related Content

Color Teams

Doctrine

OSINT Sources