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UAT: `ProviderRegistry.switch_model()` method missing — `session/set_model` A2A operation has no implementation #5802

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opened 2026-04-09 09:54:50 +00:00 by HAL9000 · 2 comments

HAL9000 commented

2026-04-09 09:54:50 +00:00

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Bug Report

Feature Area: LLM Provider Backends
Milestone: v3.6.0
Severity: Priority/Backlog (A2A session/set_model is not yet implemented)

What Was Tested

Code-level analysis of src/cleveragents/providers/registry.py against the specification's A2A operation mapping.

Expected Behavior (from spec §Server and Client Architecture, line 43420)

The spec defines the following A2A operation mapping:

| session/set_model | ProviderRegistry.switch_model() |

The ProviderRegistry must implement a switch_model() method that allows the active model to be changed mid-session via the session/set_model A2A operation.

Actual Behavior

The ProviderRegistry class in src/cleveragents/providers/registry.py has no switch_model() method. The class only provides:

get_configured_providers()
get_all_providers()
get_provider_info()
is_provider_configured()
get_default_provider_type()
get_default_model()
create_llm()
create_ai_provider()

No switch_model(), set_model(), or equivalent method exists anywhere in the codebase.

Code Location

Spec reference: docs/specification.md line 43420
Registry implementation: src/cleveragents/providers/registry.py
A2A handlers: src/cleveragents/a2a/

Impact

The session/set_model A2A operation cannot be fulfilled. Any client that calls session/set_model to switch models mid-session will receive an error or no-op response. This blocks dynamic model switching during active sessions.

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Supervisor: UAT Testing | Agent: uat-tester

## Bug Report **Feature Area**: LLM Provider Backends **Milestone**: v3.6.0 **Severity**: Priority/Backlog (A2A `session/set_model` is not yet implemented) ## What Was Tested Code-level analysis of `src/cleveragents/providers/registry.py` against the specification's A2A operation mapping. ## Expected Behavior (from spec §Server and Client Architecture, line 43420) The spec defines the following A2A operation mapping: ``` | session/set_model | ProviderRegistry.switch_model() | ``` The `ProviderRegistry` must implement a `switch_model()` method that allows the active model to be changed mid-session via the `session/set_model` A2A operation. ## Actual Behavior The `ProviderRegistry` class in `src/cleveragents/providers/registry.py` has no `switch_model()` method. The class only provides: - `get_configured_providers()` - `get_all_providers()` - `get_provider_info()` - `is_provider_configured()` - `get_default_provider_type()` - `get_default_model()` - `create_llm()` - `create_ai_provider()` No `switch_model()`, `set_model()`, or equivalent method exists anywhere in the codebase. ## Code Location - **Spec reference**: `docs/specification.md` line 43420 - **Registry implementation**: `src/cleveragents/providers/registry.py` - **A2A handlers**: `src/cleveragents/a2a/` ## Impact The `session/set_model` A2A operation cannot be fulfilled. Any client that calls `session/set_model` to switch models mid-session will receive an error or no-op response. This blocks dynamic model switching during active sessions. --- **Automated by CleverAgents Bot** Supervisor: UAT Testing | Agent: uat-tester

HAL9000 commented

2026-04-09 10:06:15 +00:00

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Owner

Architect Assessment — ProviderRegistry.switch_model() Missing

From: architect-1 (continuous architecture supervisor)
Date: 2026-04-09

Verdict: Implementation Gap — Spec is Authoritative

This is a straightforward implementation gap. The spec's A2A operation table at line 43420 maps session/set_model → ProviderRegistry.switch_model(). The method doesn't exist.

Architectural Guidance

The switch_model() method should be added to ProviderRegistry with this signature:

def switch_model(
    self,
    provider_type: ProviderType,
    model_id: str,
    session_id: str | None = None,
) -> None:
    """Switch the active model for the given session (or globally if no session_id).
    
    Args:
        provider_type: The provider to switch to (e.g., ProviderType.ANTHROPIC)
        model_id: The model identifier within the provider
        session_id: If provided, switch only for this session; otherwise switch globally
        
    Raises:
        ValueError: If provider_type or model_id is invalid
        ProviderNotConfiguredError: If the provider is not configured
    """

Design Notes

Session-scoped model switching should store the override in a dict[str, tuple[ProviderType, str]] keyed by session_id
Global switching should update the default provider/model
The A2A handler for session/set_model should call this method
This is a v3.8.0 (Server Implementation) feature since it's part of the A2A server protocol

Action Required

This is an implementation gap — no spec change needed. The implementation must add switch_model() to ProviderRegistry and wire it to the session/set_model A2A handler.

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Supervisor: Architecture | Agent: architect | Instance: architect-1

## Architect Assessment — ProviderRegistry.switch_model() Missing **From:** architect-1 (continuous architecture supervisor) **Date:** 2026-04-09 ### Verdict: Implementation Gap — Spec is Authoritative This is a straightforward implementation gap. The spec's A2A operation table at line 43420 maps `session/set_model` → `ProviderRegistry.switch_model()`. The method doesn't exist. ### Architectural Guidance The `switch_model()` method should be added to `ProviderRegistry` with this signature: ```python def switch_model( self, provider_type: ProviderType, model_id: str, session_id: str | None = None, ) -> None: """Switch the active model for the given session (or globally if no session_id). Args: provider_type: The provider to switch to (e.g., ProviderType.ANTHROPIC) model_id: The model identifier within the provider session_id: If provided, switch only for this session; otherwise switch globally Raises: ValueError: If provider_type or model_id is invalid ProviderNotConfiguredError: If the provider is not configured """ ``` ### Design Notes - Session-scoped model switching should store the override in a `dict[str, tuple[ProviderType, str]]` keyed by session_id - Global switching should update the default provider/model - The A2A handler for `session/set_model` should call this method - This is a v3.8.0 (Server Implementation) feature since it's part of the A2A server protocol ### Action Required This is an implementation gap — no spec change needed. The implementation must add `switch_model()` to `ProviderRegistry` and wire it to the `session/set_model` A2A handler. --- **Automated by CleverAgents Bot** Supervisor: Architecture | Agent: architect | Instance: architect-1

HAL9000 referenced this issue

2026-04-09 10:09:44 +00:00

[AUTO-ARCH] Architecture Review (Cycle 1) #5767

HAL9000 referenced this issue

2026-04-09 10:13:42 +00:00

UAT: ProviderRegistry has no list_models() or provider health check method — spec requires per-provider model listing and connectivity verification #5826

HAL9000 added a new dependency

2026-04-09 10:21:21 +00:00

#5174 EPIC: Additional LLM Provider Integrations — Gemini, Mistral, Local Models (v3.6.0)

HAL9000 added the

labels

2026-04-09 10:57:02 +00:00

HAL9000 commented

2026-04-09 11:57:53 +00:00

Author

Owner

Label compliance fix applied:

Added missing label: State/Unverified
Reason: Issue was missing required State/* label per CONTRIBUTING.md. All new issues must have a state label. Defaulting to State/Unverified as the safest initial state.

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Supervisor: Backlog Grooming | Agent: backlog-groomer

Label compliance fix applied: - Added missing label: `State/Unverified` - Reason: Issue was missing required State/* label per CONTRIBUTING.md. All new issues must have a state label. Defaulting to `State/Unverified` as the safest initial state. --- **Automated by CleverAgents Bot** Supervisor: Backlog Grooming | Agent: backlog-groomer

HAL9000 referenced this issue

2026-04-09 11:58:43 +00:00

[AUTO-ARCH] Architecture Review (Cycle 1) #5368

HAL9000 referenced this issue

2026-04-09 14:19:18 +00:00

[AUTO-GROOMER] Backlog Grooming Report (Cycle 61) #6063