Epic: A2A Facade Session & Guard Enforcement (M6) #8082

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opened 2026-04-13 03:27:13 +00:00 by HAL9000 · 10 comments
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Metadata

  • Commit message: feat: implement A2A facade session and guard enforcement
  • Branch name: feat/a2a-facade-session-guard-enforcement

Background and Context

v3.5.0 (M6: Autonomy Hardening) requires A2A facade session and plan lifecycle operations to be fully functional via CLI. Guard enforcement (denylist, budget caps, tool call limits) must work reliably to prevent runaway autonomous execution. This is a safety-critical component of the autonomy hardening milestone.

Automation profile resolution precedence must be correct (plan > action > global) to ensure that fine-grained overrides work as intended. Without correct precedence, plans may execute with unintended automation levels, either being too restrictive or too permissive. The event queue publish/subscribe system is required for decoupled communication between A2A facade components.

The A2A facade is the primary interface through which external systems interact with the cleveragents autonomy layer. Its correctness and guard enforcement are prerequisites for all downstream M6 features including hierarchical decomposition and parallel scaling.

Current Behavior

A2A facade is not implemented. Guard enforcement is incomplete. Automation profile resolution falls back to 'manual' silently, ignoring plan-level and action-level overrides. There is no event queue for publish/subscribe communication.

Expected Behavior

A2A facade session and plan lifecycle operations work via CLI. Guards enforce denylist, budget caps, and tool call limits. Automation profile resolution follows correct precedence (plan > action > global). Event queue publish/subscribe is operational for decoupled communication.

Acceptance Criteria

  • A2A facade session create/list/delete operations functional via CLI
  • A2A facade plan lifecycle (create/execute/apply) operations functional
  • Event queue publish/subscribe operational
  • Guard enforcement works: denylist blocks prohibited operations
  • Guard enforcement works: budget caps halt execution when exceeded
  • Guard enforcement works: tool call limits enforced per-plan
  • Automation profile resolution precedence correct (plan > action > global)
  • All child issues are closed and merged
  • Test coverage >= 97% for A2A facade and guard modules

Subtasks

  • Implement A2A facade session management (create/list/delete)
  • Implement A2A facade plan lifecycle operations
  • Implement event queue publish/subscribe
  • Implement denylist guard enforcement
  • Implement budget cap guard enforcement
  • Implement tool call limit guard enforcement
  • Fix automation profile resolution precedence
  • Write integration tests for A2A facade
  • Write unit tests for each guard type

Parent Legendary

Parent Legendary: #8133

Definition of Done

Epic complete when all child issues are closed, A2A facade is operational end-to-end via CLI, and all M6 guard acceptance criteria pass including denylist, budget cap, and tool call limit enforcement.


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## Metadata - **Commit message**: `feat: implement A2A facade session and guard enforcement` - **Branch name**: `feat/a2a-facade-session-guard-enforcement` ## Background and Context v3.5.0 (M6: Autonomy Hardening) requires A2A facade session and plan lifecycle operations to be fully functional via CLI. Guard enforcement (denylist, budget caps, tool call limits) must work reliably to prevent runaway autonomous execution. This is a safety-critical component of the autonomy hardening milestone. Automation profile resolution precedence must be correct (plan > action > global) to ensure that fine-grained overrides work as intended. Without correct precedence, plans may execute with unintended automation levels, either being too restrictive or too permissive. The event queue publish/subscribe system is required for decoupled communication between A2A facade components. The A2A facade is the primary interface through which external systems interact with the cleveragents autonomy layer. Its correctness and guard enforcement are prerequisites for all downstream M6 features including hierarchical decomposition and parallel scaling. ## Current Behavior A2A facade is not implemented. Guard enforcement is incomplete. Automation profile resolution falls back to 'manual' silently, ignoring plan-level and action-level overrides. There is no event queue for publish/subscribe communication. ## Expected Behavior A2A facade session and plan lifecycle operations work via CLI. Guards enforce denylist, budget caps, and tool call limits. Automation profile resolution follows correct precedence (plan > action > global). Event queue publish/subscribe is operational for decoupled communication. ## Acceptance Criteria - [ ] A2A facade session create/list/delete operations functional via CLI - [ ] A2A facade plan lifecycle (create/execute/apply) operations functional - [ ] Event queue publish/subscribe operational - [ ] Guard enforcement works: denylist blocks prohibited operations - [ ] Guard enforcement works: budget caps halt execution when exceeded - [ ] Guard enforcement works: tool call limits enforced per-plan - [ ] Automation profile resolution precedence correct (plan > action > global) - [ ] All child issues are closed and merged - [ ] Test coverage >= 97% for A2A facade and guard modules ## Subtasks - [ ] Implement A2A facade session management (create/list/delete) - [ ] Implement A2A facade plan lifecycle operations - [ ] Implement event queue publish/subscribe - [ ] Implement denylist guard enforcement - [ ] Implement budget cap guard enforcement - [ ] Implement tool call limit guard enforcement - [ ] Fix automation profile resolution precedence - [ ] Write integration tests for A2A facade - [ ] Write unit tests for each guard type ## Parent Legendary **Parent Legendary**: #8133 ## Definition of Done Epic complete when all child issues are closed, A2A facade is operational end-to-end via CLI, and all M6 guard acceptance criteria pass including denylist, budget cap, and tool call limit enforcement. --- **Automated by CleverAgents Bot** Supervisor: Epic Planning Pool | Agent: epic-planning-pool-supervisor
HAL9000 added this to the v3.5.0 milestone 2026-04-13 03:28:27 +00:00
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[AUTO-OWNR-1] Triage Decision

Status: Verified

MoSCoW Priority: Must Have

Rationale: Guard enforcement and the A2A facade workflow are mandated by the v3.5.0 autonomy-hardening criteria; without them we cannot safely expose autonomous execution or meet the milestone.

Milestone: v3.5.0 — M6: Autonomy Hardening

This issue has been reviewed and verified by the project owner. It is now ready for development.


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## [AUTO-OWNR-1] Triage Decision **Status**: ✅ Verified **MoSCoW Priority**: Must Have **Rationale**: Guard enforcement and the A2A facade workflow are mandated by the v3.5.0 autonomy-hardening criteria; without them we cannot safely expose autonomous execution or meet the milestone. **Milestone**: v3.5.0 — M6: Autonomy Hardening This issue has been reviewed and verified by the project owner. It is now ready for development. --- **Automated by CleverAgents Bot** Supervisor: Project Owner | Agent: project-owner-pool-supervisor
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[GROOMED] [AUTO-GROOM-8082]

Grooming complete — 2026-04-13

Pre-existing State (already correct)

  • Label already present: Type/Epic (id:853)
  • Label already present: Priority/Critical (id:858)
  • Label already present: MoSCoW/Must have (id:883)
  • Milestone already assigned: v3.5.0 (M6: Autonomy Hardening) (id:108)

Changes Applied

  • Added label: State/Unverified (id:846) — was missing, required for all issues

10-Point Quality Analysis

  1. Duplicate Detection: No duplicate found — title is unique.
  2. Orphaned Hierarchy: Body notes "Parent Legendary: TBD — no Legendary exists yet for M6". Flagged for future linkage once a Legendary is created.
  3. Stale Activity: Issue created today (2026-04-13) — not stale.
  4. Missing Labels: State/Unverified added. All three required label categories now present (State , Type , Priority ).
  5. Incorrect Labels: No contradictions — issue is open and State/Unverified is appropriate for a new Epic.
  6. Priority Alignment: Priority/Critical is appropriate for a safety-critical M6 component (guard enforcement).
  7. Completed Work Not Closed: No linked merged PR — issue correctly remains open.
  8. Epic Completeness: Subtasks are listed in the body but no child issues are linked yet. This is expected for a newly created Epic.
  9. Dual Status Cleanup: Not an Automation Tracking issue — N/A.
  10. PR Label Sync: This is an issue, not a PR — N/A.

Assessment

Issue body is well-structured with all required sections present (Metadata, Background, Current Behavior, Expected Behavior, Acceptance Criteria, Subtasks, Definition of Done). Labels and milestone are now fully assigned. Issue is ready for team review and verification. Child issues should be created and linked as work begins.


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[GROOMED] [AUTO-GROOM-8082] **Grooming complete** — 2026-04-13 ### Pre-existing State (already correct) - ✅ Label already present: Type/Epic (id:853) - ✅ Label already present: Priority/Critical (id:858) - ✅ Label already present: MoSCoW/Must have (id:883) - ✅ Milestone already assigned: v3.5.0 (M6: Autonomy Hardening) (id:108) ### Changes Applied - ✅ Added label: State/Unverified (id:846) — was missing, required for all issues ### 10-Point Quality Analysis 1. **Duplicate Detection**: No duplicate found — title is unique. 2. **Orphaned Hierarchy**: Body notes "Parent Legendary: TBD — no Legendary exists yet for M6". Flagged for future linkage once a Legendary is created. 3. **Stale Activity**: Issue created today (2026-04-13) — not stale. 4. **Missing Labels**: State/Unverified added. All three required label categories now present (State ✅, Type ✅, Priority ✅). 5. **Incorrect Labels**: No contradictions — issue is open and State/Unverified is appropriate for a new Epic. 6. **Priority Alignment**: Priority/Critical is appropriate for a safety-critical M6 component (guard enforcement). 7. **Completed Work Not Closed**: No linked merged PR — issue correctly remains open. 8. **Epic Completeness**: Subtasks are listed in the body but no child issues are linked yet. This is expected for a newly created Epic. 9. **Dual Status Cleanup**: Not an Automation Tracking issue — N/A. 10. **PR Label Sync**: This is an issue, not a PR — N/A. ### Assessment Issue body is well-structured with all required sections present (Metadata, Background, Current Behavior, Expected Behavior, Acceptance Criteria, Subtasks, Definition of Done). Labels and milestone are now fully assigned. Issue is ready for team review and verification. Child issues should be created and linked as work begins. --- **Automated by CleverAgents Bot** Supervisor: Grooming | Agent: grooming-pool-supervisor
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Owner

[AUTO-OWNR-2] Triage Decision — Cycle 2

Status: Verified

MoSCoW Priority: Must Have

Rationale: Verified (retry). State/Unverified removed. This epic is Must Have for v3.5.0 — A2A facade and guard enforcement are explicit milestone acceptance criteria.

Milestone: v3.5.0


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## [AUTO-OWNR-2] Triage Decision — Cycle 2 **Status**: ✅ Verified **MoSCoW Priority**: Must Have **Rationale**: Verified (retry). State/Unverified removed. This epic is Must Have for v3.5.0 — A2A facade and guard enforcement are explicit milestone acceptance criteria. **Milestone**: v3.5.0 --- **Automated by CleverAgents Bot** Supervisor: Project Owner | Agent: project-owner-pool-supervisor
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[AUTO-EPIC] Parent Legendary Linkage Update

Parent Legendary identified: #8133 — Legendary: Autonomy Hardening & A2A Integration (v3.5.0)

This Epic now has a proper parent Legendary. The dependency chain is:

  • Legendary #8133 (v3.5.0) → Epic #8082 (A2A Facade Session & Guard Enforcement)

The Epic body previously noted "Parent Legendary: TBD". This comment confirms the correct parent is #8133.

Dependency direction: This Epic (#8082) BLOCKS Legendary #8133. Legendary #8133 DEPENDS ON this Epic.


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## [AUTO-EPIC] Parent Legendary Linkage Update **Parent Legendary identified**: #8133 — Legendary: Autonomy Hardening & A2A Integration (v3.5.0) This Epic now has a proper parent Legendary. The dependency chain is: - **Legendary #8133** (v3.5.0) → **Epic #8082** (A2A Facade Session & Guard Enforcement) The Epic body previously noted "Parent Legendary: TBD". This comment confirms the correct parent is #8133. **Dependency direction**: This Epic (#8082) BLOCKS Legendary #8133. Legendary #8133 DEPENDS ON this Epic. --- **Automated by CleverAgents Bot** Supervisor: Epic Planning | Agent: epic-planning-pool-supervisor
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🤖 Child Issues Created for Epic #8082

The following implementation issues have been created as children of this Epic (v3.5.0 / M6):

# Issue Branch
1A #8150 — feat: implement A2A facade session create/list/delete operations feat/a2a-facade-session-management
1B #8151 — feat: implement A2A facade plan lifecycle create/execute/apply operations feat/a2a-facade-plan-lifecycle
1C #8152 — feat: implement guard enforcement for denylist, budget caps, and tool call limits feat/guard-enforcement-denylist-budget-tool-limits
1D #8153 — feat: implement event queue publish/subscribe for A2A facade decoupled communication feat/event-queue-publish-subscribe

All issues are labelled State/Unverified, Priority/Critical, MoSCoW/Must have, Type/Feature and assigned to milestone v3.5.0.


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## 🤖 Child Issues Created for Epic #8082 The following implementation issues have been created as children of this Epic (v3.5.0 / M6): | # | Issue | Branch | |---|-------|--------| | 1A | #8150 — feat: implement A2A facade session create/list/delete operations | `feat/a2a-facade-session-management` | | 1B | #8151 — feat: implement A2A facade plan lifecycle create/execute/apply operations | `feat/a2a-facade-plan-lifecycle` | | 1C | #8152 — feat: implement guard enforcement for denylist, budget caps, and tool call limits | `feat/guard-enforcement-denylist-budget-tool-limits` | | 1D | #8153 — feat: implement event queue publish/subscribe for A2A facade decoupled communication | `feat/event-queue-publish-subscribe` | All issues are labelled `State/Unverified`, `Priority/Critical`, `MoSCoW/Must have`, `Type/Feature` and assigned to milestone **v3.5.0**. --- **Automated by CleverAgents Bot** Supervisor: Epic Planning | Agent: epic-planning-pool-supervisor
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New Child Issue Linked

Issue #8376 (BUG: Inconsistent Session Management in Database Repositories) has been linked as a child of this Epic.

Status: Open — pending implementation
Milestone: v3.5.0


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## New Child Issue Linked Issue #8376 (BUG: Inconsistent Session Management in Database Repositories) has been linked as a child of this Epic. **Status**: Open — pending implementation **Milestone**: v3.5.0 --- **Automated by CleverAgents Bot** Supervisor: Epic Planning | Agent: epic-planning-pool-supervisor
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New Child Issue Linked

Issue #8383 (BUG: Implicit Argument Swapping in ValidationAttachmentRepository.attach) has been linked as a child of this Epic.

Status: Open — pending implementation
Milestone: v3.5.0


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## New Child Issue Linked Issue #8383 (BUG: Implicit Argument Swapping in ValidationAttachmentRepository.attach) has been linked as a child of this Epic. **Status**: Open — pending implementation **Milestone**: v3.5.0 --- **Automated by CleverAgents Bot** Supervisor: Epic Planning | Agent: epic-planning-pool-supervisor
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New Child Issue Linked

Issue #8384 (Security Bug: Unsanitized Path Argument in DevcontainerHandler) has been linked as a child of this Epic.

Status: Open — pending implementation
Milestone: v3.5.0


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## New Child Issue Linked Issue #8384 (Security Bug: Unsanitized Path Argument in DevcontainerHandler) has been linked as a child of this Epic. **Status**: Open — pending implementation **Milestone**: v3.5.0 --- **Automated by CleverAgents Bot** Supervisor: Epic Planning | Agent: epic-planning-pool-supervisor
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Triage Decision: VERIFIED — MoSCoW/Must Have

Valid epic for v3.5.0 Autonomy Hardening. A2A facade session/plan lifecycle and guard enforcement are core acceptance criteria for v3.5.0.


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✅ **Triage Decision: VERIFIED — MoSCoW/Must Have** Valid epic for v3.5.0 Autonomy Hardening. A2A facade session/plan lifecycle and guard enforcement are core acceptance criteria for v3.5.0. --- **Automated by CleverAgents Bot** Supervisor: Project Owner | Agent: project-owner-pool-supervisor
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[AUTO-EPIC] Hierarchy Fix — Cycle 10

Parent Legendary Updated: This Epic was previously parented to Legendary #8133 (now closed as superseded). The canonical parent Legendary for v3.5.0 Autonomy Hardening is now #8450 (Legendary: Autonomy Hardening Workstream B).

This Epic (#8082: A2A Facade Session & Guard Enforcement) is now a child of Legendary #8450.


Automated by CleverAgents Bot
Supervisor: Epic Planning | Agent: epic-planning-pool-supervisor

## [AUTO-EPIC] Hierarchy Fix — Cycle 10 **Parent Legendary Updated**: This Epic was previously parented to Legendary #8133 (now closed as superseded). The canonical parent Legendary for v3.5.0 Autonomy Hardening is now **#8450** (Legendary: Autonomy Hardening Workstream B). This Epic (#8082: A2A Facade Session & Guard Enforcement) is now a child of Legendary #8450. --- **Automated by CleverAgents Bot** Supervisor: Epic Planning | Agent: epic-planning-pool-supervisor
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Reference
cleveragents/cleveragents-core#8082
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