Today was not about trading strategies or indicators. It was about building rules that protect the system itself.

I decided to formalize everything that had been living implicitly in my head—assumptions, safety checks, failure handling—into something explicit, versioned, and enforceable.

Morning — Defining the Problem

As the system grew (TradingView → n8n → Python engine → exchange), I realized something uncomfortable:

  • Many decisions were assumed, not enforced
  • Some failures would only be discovered after money was at risk
  • There was no single source of truth for “what is allowed” vs “what is a bug”

The conclusion was simple:

Before adding more logic, the system needed a constitution.

Late Morning — Designing the Constitution

I defined a Trading System Constitution v1.0: a set of documents that sit above the code.

The scope was intentionally strict:

  • Canonical schemas (what data is allowed to exist)
  • Idempotency rules (what must never happen twice)
  • Retry and circuit breaker policies
  • Execution state machine (legal state transitions only)
  • Observability requirements (what must be visible)
  • Database schema and operational queries

The key rule:

If it’s not in the Constitution, it’s not allowed in production.

Midday — Structuring the Repository

I organized the Constitution as first-class assets in the repository:

docs/constitution/
├── README.md
├── 01-canonical-schema.md
├── 02-idempotency.md
├── 03-htf-cache.md
├── 04-retry-circuit-breaker.md
├── 05-observability.md
├── 06-state-machine.md
├── 07-database.md
└── schemas/

Each section is atomic, referencable, and versionable.

This immediately changed how I thought about future development: every new feature now has to answer where it fits in this structure.

Early Afternoon — Git Initialization and Hard Lessons

This was the messy part.

  • Initial git add failed because the directory was not a Git repo
  • SSH authentication worked, but pushes failed with Repository not found
  • The root cause turned out not to be permissions or shell access

The real issue: the SSH key was authenticated to the wrong GitHub account.

Once the correct account and SSH key alignment were verified, everything clicked into place.

This was a good reminder:

Git errors are rarely about Git itself—they’re about identity.

Afternoon — Constitution Becomes the Source of Truth

With the repository correctly set up, I committed:

  • The full Constitution
  • JSON Schemas for all signal boundaries

At this point, the Constitution stopped being “documentation” and became law.

From now on:

  • Design changes happen via Git
  • Breaking changes are explicit
  • History is preserved

Late Afternoon — Adding CI as an Enforcement Layer

Documentation alone is not enough. Rules must be enforced automatically.

I added a GitHub Actions workflow:

  • Triggers on changes to docs/constitution/**
  • Validates all JSON Schemas
  • Fails the build if schemas are invalid

This turns the Constitution into something actionable:

  • Invalid schemas cannot be merged
  • Silent breaking changes are blocked
  • Mistakes are caught before deployment

The first CI run failed—correctly—due to a directory casing issue: .github/workFlows vs .github/workflows.

Fixing that and seeing the workflow re-run was a small but important victory.

End of Day — What Changed

By the end of today, the system had gained something more valuable than a new feature:

  • A single source of truth
  • Automated enforcement of core rules
  • Clear separation between:
    • What the system may do
    • What the system must never do

Most importantly, future work just became safer.

Reflection

Today didn’t make the strategy more profitable. It made the system harder to break.

That’s a trade I will take every time.

Tomorrow, the Constitution will start shaping the Python engine and execution logic—but now, it will do so on solid ground.