feat(acms): add text, vector, and graph backend protocol implementations #519

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freemo merged 1 commit from feature/m5-acms-backends into master 2026-03-03 03:34:29 +00:00

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freemo commented 2026-03-03 00:03:14 +00:00

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Summary

• Implements the Backend Abstraction Layer (BAL) for the ACMS, adding TextBackend, VectorBackend, and GraphBackend protocols with corresponding frozen result dataclasses (TextResult, VectorResult, GraphResult)
• Provides in-memory stub backends (InMemoryTextBackend, InMemoryVectorBackend, InMemoryGraphBackend) as development placeholders and test doubles
• Registers all three backends in the DI container as configurable Singletons with provider override support

Closes #498

Approach

Protocol Design

• Each backend protocol is a @runtime_checkable Protocol following the structural subtyping pattern established by ResourceHandler in the codebase
• Result types are frozen dataclass instances (not Pydantic) to minimize construction overhead in the context assembly hot path
• The scope parameter is typed as frozenset[str] (resource ULIDs) for immutability and hashability, enabling scoped views per the specification's multi-project isolation requirement

Result Dataclasses

• TextResult and VectorResult: uko_uri, content, score (0.0-1.0), metadata fields with __post_init__ validation
• GraphResult: triples (list of (subject, predicate, object) tuples), metadata fields

DI Container

• All three backends registered as providers.Singleton in the Container class
• Default: in-memory stubs; production backends (Tantivy, FAISS, Blazegraph, etc.) swap via override_providers()

Testing

• Behave BDD: 35 scenarios / 83 steps covering protocol compliance, argument validation, result immutability, and DI resolution
• Robot Framework: 6 smoke tests for integration verification
• ASV Benchmarks: 4 benchmark suites measuring stub query overhead and instantiation time

Module Locations

Module	Purpose
src/cleveragents/domain/models/acms/backends.py	Protocol definitions and result dataclasses
src/cleveragents/domain/models/acms/stubs.py	In-memory stub implementations
src/cleveragents/application/container.py	DI container backend registration
docs/reference/acms_backends.md	Reference documentation

## Summary - Implements the Backend Abstraction Layer (BAL) for the ACMS, adding `TextBackend`, `VectorBackend`, and `GraphBackend` protocols with corresponding frozen result dataclasses (`TextResult`, `VectorResult`, `GraphResult`) - Provides in-memory stub backends (`InMemoryTextBackend`, `InMemoryVectorBackend`, `InMemoryGraphBackend`) as development placeholders and test doubles - Registers all three backends in the DI container as configurable Singletons with provider override support Closes #498 ## Approach ### Protocol Design - Each backend protocol is a `@runtime_checkable` `Protocol` following the structural subtyping pattern established by `ResourceHandler` in the codebase - Result types are frozen `dataclass` instances (not Pydantic) to minimize construction overhead in the context assembly hot path - The `scope` parameter is typed as `frozenset[str]` (resource ULIDs) for immutability and hashability, enabling scoped views per the specification's multi-project isolation requirement ### Result Dataclasses - `TextResult` and `VectorResult`: `uko_uri`, `content`, `score` (0.0-1.0), `metadata` fields with `__post_init__` validation - `GraphResult`: `triples` (list of (subject, predicate, object) tuples), `metadata` fields ### DI Container - All three backends registered as `providers.Singleton` in the `Container` class - Default: in-memory stubs; production backends (Tantivy, FAISS, Blazegraph, etc.) swap via `override_providers()` ### Testing - **Behave BDD**: 35 scenarios / 83 steps covering protocol compliance, argument validation, result immutability, and DI resolution - **Robot Framework**: 6 smoke tests for integration verification - **ASV Benchmarks**: 4 benchmark suites measuring stub query overhead and instantiation time ### Module Locations | Module | Purpose | |--------|--------| | `src/cleveragents/domain/models/acms/backends.py` | Protocol definitions and result dataclasses | | `src/cleveragents/domain/models/acms/stubs.py` | In-memory stub implementations | | `src/cleveragents/application/container.py` | DI container backend registration | | `docs/reference/acms_backends.md` | Reference documentation |

freemo added the

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Feature

label 2026-03-03 00:11:08 +00:00

freemo added this to the v3.4.0 milestone 2026-03-03 00:19:53 +00:00

freemo referenced this pull request 2026-03-03 00:50:51 +00:00

feat(acms): add text, vector, and graph backend protocol implementations #498

freemo scheduled this pull request to auto merge when all checks succeed 2026-03-03 03:06:19 +00:00

freemo scheduled this pull request to auto merge when all checks succeed 2026-03-03 03:12:20 +00:00

freemo self-assigned this 2026-03-03 03:12:39 +00:00

freemo force-pushed feature/m5-acms-backends from ac7496f069 to 7479d57e29 2026-03-03 03:12:51 +00:00 Compare

freemo force-pushed feature/m5-acms-backends from 7479d57e29 to 025d379946 2026-03-03 03:29:33 +00:00 Compare

freemo merged commit 025d379946 into master 2026-03-03 03:34:29 +00:00

freemo deleted branch feature/m5-acms-backends 2026-03-03 03:34:29 +00:00

freemo referenced this pull request 2026-03-04 00:37:54 +00:00

feat(acms): add text, vector, and graph backend protocol implementations #498

freemo added the

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freemo referenced this pull request 2026-03-04 01:07:41 +00:00

feat(acms): add text, vector, and graph backend protocol implementations #498

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