Aethos · Coder · by STK Engineering Autonomous engineering agent · 2026

Autonomous code.
Sovereign reasoning.

Aethos Coder plans, writes, verifies and delivers code changes across your entire codebase — on your hardware, behind your firewall, on your terms.

aethos-coder · agent.session
[init] Initialising Aethos Coder agent…
I · PRINCIPLES Built for production, not demos

Not a copilot.
A colleague.

Three commitments separate Aethos Coder from autocomplete tooling. Each is a hard claim — verifiable in your repository, on your hardware, on day one of the pilot.

01

Autonomous execution.

Aethos Coder does not just suggest code; it understands the whole codebase, plans complex refactors and executes them with surgical precision — across files, across services, across days.

02

Deep context awareness.

Built on advanced RAG and persistent semantic memory, the agent retains an evolving model of your architecture, your patterns and your business logic — between sessions, between branches, between teams.

03

Verified by default.

Every change runs unit tests, static analysis and security scans before it leaves the agent. If verification fails, the change does not ship — the agent reports back and revises. No surprise diffs.

II · CAPABILITIES What it actually does

Eight surfaces of
real engineering.

A

Code generation

Generates production-grade code across languages and frameworks, following your team's conventions and style guides.

  • Full file creation from natural-language specs
  • Function and method scaffolding with type signatures
  • API endpoint generation (REST, GraphQL, gRPC)
  • Database schema migrations and seed data
  • Configuration files (Docker, Kubernetes, CI/CD)
Python TypeScript Go Java Rust C++ SQL
B

Codebase understanding

Builds a deep, persistent model of your repository — architecture, dependencies, data flows and team conventions.

  • Full repository indexing and symbol resolution
  • Dependency graph construction (import, call, data)
  • Architecture pattern recognition (MVC, CQRS, event-driven)
  • API surface mapping and contract inference
  • Technical-debt and code-smell detection
RAG Semantic search AST Graph DB
C

Refactoring & modernisation

Performs safe, verified refactors across your codebase — from small cleanups to large-scale architectural migrations.

  • Class and module restructuring with dependency updates
  • Monolith to microservices decomposition
  • Framework upgrades (AngularJS → Angular, Spring Boot 2 → 3)
  • Legacy language migration (COBOL → Java, PHP → Go)
  • Dead-code removal and unused-import cleanup
Safe refactor Multi-file Verified
D

Testing & verification

Every code change is automatically tested. Unit, integration and end-to-end tests are generated and executed.

  • Unit-test generation with edge-case coverage
  • Integration-test scaffolding for APIs and services
  • Property-based and fuzz testing setup
  • Static analysis integration (SonarQube, ESLint, Pylint)
  • Test-coverage reporting and gap analysis
Jest Pytest JUnit Playwright SonarQube
E

Debugging & diagnostics

Diagnoses issues from stack traces, logs and runtime behaviour — then proposes and applies fixes.

  • Stack-trace analysis and root-cause identification
  • Log-pattern analysis for anomaly detection
  • Performance bottleneck identification (profiling)
  • Memory-leak detection and resolution
  • Concurrency and race-condition analysis
Stack traces Profiling Log analysis
F

DevOps & CI/CD

Generates and maintains infrastructure-as-code, CI/CD pipelines and deployment configurations.

  • Dockerfile and docker-compose generation
  • Kubernetes manifests and Helm charts
  • CI/CD pipelines (GitHub Actions, GitLab CI, Jenkins)
  • Terraform and Pulumi infrastructure definitions
  • Environment-configuration management
Docker Kubernetes Terraform GitHub Actions GitLab CI
G

Documentation

Generates and maintains documentation that stays in sync with your codebase — without the drift.

  • API documentation (OpenAPI/Swagger)
  • Inline code comments and docstrings
  • READMEs and architecture decision records (ADRs)
  • Changelog generation from commit history
  • Runbook and incident-response documentation
OpenAPI Markdown Sphinx JSDoc
H

Security & compliance

Scans for vulnerabilities, enforces security policies and ensures compliance with industry standards.

  • Static application security testing (SAST)
  • Dependency-vulnerability scanning (CVE detection)
  • Secret detection (API keys, tokens, credentials)
  • OWASP Top-10 compliance checks
  • GDPR, SOC 2, HIPAA-aware code generation
SAST OWASP CVE SOC 2
III · THE WORKFLOW Six stages, fully transparent

Structured.
Auditable. End to end.

Aethos Coder follows a deterministic six-stage workflow. Every stage produces an artefact, every artefact is logged, every log is auditable.

I

Ingest

Agent receives the task — a feature request, bug report or refactoring goal.

II

Understand

Indexes relevant code, builds dependency maps, identifies affected modules.

III

Plan

Drafts a step-by-step execution plan with risk assessment and rollback strategy.

IV

Execute

Writes code, updates configs, creates migrations — all within your repo.

V

Verify

Runs tests, static analysis and security scans. Fails fast if anything is off.

VI

Deliver

Opens a pull request with full diff, test results and documentation updates.

IV · THE BUSINESS CASE Velocity · Retention · Risk

Three returns,
one asset.

Accelerated velocity.

Reduce development cycles by automating repetitive tasks, boilerplate generation and test creation. Concept to production, measurably faster.

Knowledge retention.

Aethos Coder is a living repository of your architectural decisions. Institutional knowledge stays inside the codebase — even as teams evolve and rotate.

0

Risk mitigation.

Minimise human error on critical refactors and modernisation projects through automated verification and strict adherence to your standards.

Sovereign by design

On-premise. Always.

Your data never leaves your network. Aethos Coder is built for highly regulated industries — enterprise-grade AI capabilities, delivered inside your existing infrastructure.

V · USE CASES Where it earns its keep

Concrete
enterprise terrain.

CASE 01

Legacy modernisation

Automate the migration of COBOL, PL/1 or older Java estates to modern, scalable microservices — with generated tests as the safety net.

CASE 02

Rapid feature delivery

Accelerate the development lifecycle by delegating routine tasks, boilerplate generation and bug-fixing to your autonomous agent.

CASE 03

Automated compliance

Ensure every line of code adheres to your organisation's security standards and regulatory requirements — automatically, continuously, auditably.

VI · GET STARTED Three weeks to a working pilot

Begin where it
proves itself.

Ready to deploy your autonomous coding agent? Tell us about your stack and we'll set up a demo tailored to it.

Vienna, Austria
office@stk-engineering.com
Ferrogasse 59, 1180 Wien
Belgrade, Serbia
office@stk-engineering.com
Moravska 6, 11000 Beograd
Chalandri, Greece
office@stk-engineering.com
Nestoros 1, 15231 Chalandri
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