Elixir Development Standards v2.0: Complete File Excellence

#The Complete File Excellence Standard

Version 2.0 of the Elixir Development Standards raises the bar from “good code” to “complete code.” Every public function in the platform must meet six mandatory requirements.

#The Six Requirements

A. Complete Implementation Every public function must be fully operational. No partial implementations, no deferred logic, no conditional stubs. If a function exists in the public API, it works completely.

# Required: Full implementation
@doc "Calculates risk score based on multiple weighted factors."
@spec calculate_risk(map()) :: {:ok, float()} | {:error, atom()}
def calculate_risk(%{factors: factors} = params) do
  weighted_scores =
    Enum.map(factors, fn {factor, value} ->
      weight = fetch_weight(factor)
      value * weight
    end)

  total = Enum.sum(weighted_scores) / max(length(weighted_scores), 1)
  {:ok, Float.round(total, 4)}
end

B. Documentation (@doc) Every public function has a @doc string explaining what it does, its parameters, return values, and at least one example. Documentation is not optional.

C. Doctests Every @doc includes at least one iex> doctest that serves as both documentation and a living test. These are verified by mix test --only doctests.

@doc """
Normalizes a confidence score to the 0.0-1.0 range.

## Examples

    iex> normalize_confidence(0.85)
    0.85

    iex> normalize_confidence(1.5)
    1.0

    iex> normalize_confidence(-0.3)
    0.0
"""

D. Type Specifications (@spec) Every public function has a complete @spec annotation. Complex types use @type definitions. Dialyzer validates all specs at compile time.

E. Benchmarks Performance-critical functions (query, search, calculate, transform, process, analyze, parse, encode, decode, serialize, compress) have Benchee benchmark coverage in bench/.

F. Folder README Every directory containing Elixir source files has a README.md documenting its purpose, the modules it contains, and their relationships.

#Enforcement

The standards are enforced through:

1. Pre-commit hooks - Block commits missing any of the six requirements
2. Quality gates - mix quality.gates validates all standards
3. CI/CD pipeline - Automated validation on every push
4. Agent protocols - All AIAD agents must comply

#Why This Matters

When every function is documented, tested, typed, and benchmarked from creation, the platform achieves:

• Self-documenting codebase - New developers can understand any module by reading its docs
• Living documentation - Doctests ensure docs never drift from implementation
• Type safety - Dialyzer catches type errors at compile time
• Performance awareness - Benchmarks prevent accidental performance regressions
• Navigable architecture - README.md files provide a guided tour of the codebase

This is the difference between code that works and code that endures.

Elixir Development Standards v2.0 - Because “it compiles” is not enough.