infer-design-patterns-from-code

name	infer-design-patterns-from-code
description	Infer the design-patterns catalogue (architecture/design-patterns.yaml) from scan-index.json during /codify by mapping naming suffixes, framework idioms, and layered directory trees to named patterns — each scoped as system/layer/component/cross-cutting, cited to a driver, with alternatives considered and source_type tagged. Called by tech-architect after logical-architecture and physical-architecture proposals exist.
version	0.1.0
user-invocable	false
model	sonnet
allowed-tools	Read, Write, Grep, Glob
deprecated	true
deprecated_note	#434 ProductOS realignment — superseded by the command model; retained for Phase E reference, not installed

infer-design-patterns-from-code

Called by tech-architect during /codify, after logical-architecture and physical-architecture proposals have been written. Produces {stm_base}/{issue}/evidence/codify/proposals/architecture/design-patterns.yaml.

Purpose

Brownfield projects already encode their design patterns in directory layout, naming conventions, and framework idioms — a Repository-suffix cluster proves the Repository pattern; a src/domain + src/application + src/infrastructure tree proves Hexagonal / Clean Architecture; a queue dep plus listener files prove Pub/Sub. The /codify bootstrap must lift that knowledge out of code so the pattern catalogue matches reality before a human edits it.

This skill reads scan-index.json plus the sibling logical and physical architecture proposals, applies a deterministic signal → pattern mapping table, scopes every detected pattern (system / layer / component / cross-cutting), cites a concrete driver, lists ≥ 1 alternative, and tags every entry source_type: inferred_from_code.

Tier-1 inference. learning_category: arch. sub_category: patterns.

Input

Receive from tech-architect via JSON contract. All paths absolute.

Field	Required	Description
scan_index_path	yes	scan-index.json produced by scan.py.
stm_base	yes	STM root (stm.base-path in .garura/core/config.yaml).
issue	yes	Issue number (STM namespace).
output_path	yes	{stm_base}/{issue}/evidence/codify/proposals/architecture/design-patterns.yaml.
decision_manifest_path	yes	{…}/architecture/decision-manifest-infer-design-patterns.yaml.
resolution_trace_path	yes	{…}/architecture/resolution-trace-infer-design-patterns.yaml.