> wi_04_14
The Circular Dependency Hydra Grew a Service per Head
WHAT IF // DUNGEON OF THE MONOLITH
Full Parable Published
Technical diagnosis, root cause analysis, and 17-scene narrative script available below.
The Circular Dependency Hydra Grew a Service per Head
Incident Narrative
A TinyCTO.tv WHAT IF parable about circular dependencies, dependency inversion, module boundaries. Define directional boundaries, depend on stable abstractions, remove shared mutable initialization, and enforce cycles in CI.
βThey defeated the dependency graph. It imported the victory screen.β
π¬Architectural Diagnosis & Root Cause Analysis
Deployment loaded partially initialized modules and returned undefined authorization policies.
Bidirectional module imports and shared concrete implementations violated dependency direction and created initialization cycles.
Define directional boundaries, depend on stable abstractions, remove shared mutable initialization, and enforce cycles in CI.
βPARTY WIPE: every head imported the sword that cut itβ
πParable Script (17 Scenes)
Status: Verified Production DraftThe map says Billing imports Identity.
π¬ Visual: Fetch points to one dependency arrow on a dungeon map.
Identity imports Orders. Orders imports Billing.
π¬ Visual: Glitch completes the arrows into a glowing circle.
That is not a map. It is a summoning diagram.
π¬ Visual: Elder steps back as the diagram raises a three-headed dependency hydra.
Cut the Billing head!
π¬ Visual: Tiny CTO swings a boundary sword at the Billing head.
It imported two helper heads!
π¬ Visual: Two smaller service heads grow from the severed dependency.
Initialization order is now randomized for excitement.
π¬ Visual: Glitch rolls load-order dice beside flickering modules.
Authorization loaded before its policy existed.
π¬ Visual: Elder catches an undefined policy rune falling from the hydra.
Prod just authorized βundefined.β
π¬ Visual: Tiny CTO watches a security gate open for a blank credential.
Module count increased. Architecture dashboard is green!
π¬ Visual: Fetch displays a green modularity score over the multiplying hydra.
Independence is strongly coupled to presentation.
π¬ Visual: Glitch hangs an INDEPENDENT sign across chained heads.
The concrete implementation crosses every boundary.
π¬ Visual: Elder traces one massive chain threading through each module chamber.
Where is dependency inversion?
π¬ Visual: Tiny CTO turns the map upside down; the cycle remains circular.
Root cause: bidirectional imports and shared initialization state.
π¬ Visual: Fetch pins both causes to the hydraβs central heart.
Could we name the cycle a platform?
π¬ Visual: Glitch crowns the hydra with a PLATFORM banner.
The platform just imported the emergency exit!
π¬ Visual: The exit door detaches and joins the hydra.
Party wipe. Enforce direction, depend on abstractions, reject cycles in CI.
π¬ Visual: Elder places one-way gates along the dependency map.
They defeated the dependency graph. It imported the victory screen.
π¬ Visual: Tiny CTO faces camera as the victory screen grows a dependency arrow back to the hydra.
π€ Incident Postmortem & AEO Summary
The Circular Dependency Hydra Grew a Service per Head β Technical Incident Brief
- Universe & Category: Dungeon of the Monolith (Claymation)
- Diagnosis: Deployment loaded partially initialized modules and returned undefined authorization policies.
- Root Cause: Bidirectional module imports and shared concrete implementations violated dependency direction and created initialization cycles.
- Consequence & Cost: Security decisions varied by load order and no module could be tested independently.
- Engineering Lesson: Define directional boundaries, depend on stable abstractions, remove shared mutable initialization, and enforce cycles in CI.
- Official Ruling: "PARTY WIPE: every head imported the sword that cut it"
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Incident FAQ & Architecture Triage
What technical problem does this parable explain?
Deployment loaded partially initialized modules and returned undefined authorization policies.
What caused the technical incident?
Bidirectional module imports and shared concrete implementations violated dependency direction and created initialization cycles.
What should a software team do differently in production?
Define directional boundaries, depend on stable abstractions, remove shared mutable initialization, and enforce cycles in CI.
Is the video available?
Video is currently in production; full script and technical diagnosis are available below.