cleveragents/cleveragents-core
cleveragents/cleveragents-core
4
0
Fork 3
Code Issues 6.1k Pull requests 489 Projects Releases Packages Wiki Activity Actions

feat(a2a): implement JSON-RPC 2.0 wire format and method routing #708

Closed
freemo wants to merge 2 commits from feature/m9-a2a-jsonrpc into master
pull from: feature/m9-a2a-jsonrpc
merge into: cleveragents:master
Conversation 5 Commits 2 Files changed 51 +3149 -854
freemo commented 2026-03-12 01:01:04 +00:00
Owner
Copy link

Summary

Implements the A2A JSON-RPC 2.0 wire format and method routing layer per ADR-047 and the specification (§Architecture > A2A Integration Architecture), replacing the custom ACP envelope types with standard JSON-RPC 2.0 via the A2A SDK.

Closes #690

Changes

New modules in src/cleveragents/a2a/

  • jsonrpc_models.py — Pydantic models for JSON-RPC 2.0 request/response/error envelopes, batch support, and A2A-specific method parameters
  • jsonrpc_router.py — Method routing dispatcher supporting standard A2A methods (message/send, message/stream, tasks/get, tasks/cancel) and _cleveragents/ extension methods (plan/, registry/, context/, sync/, namespace/*, health)
  • jsonrpc_handlers.py — Handler implementations for each routed method, delegating to existing application services
  • jsonrpc_errors.py — Error taxonomy mapping domain exceptions to JSON-RPC error codes (-32600 through -32099 for A2A-specific errors)
  • agent_card.py — Agent Card generation for /.well-known/agent.json endpoint, declaring capabilities, supported interfaces, auth schemes, and _cleveragents/ extensions

Test files

  • features/a2a_jsonrpc.feature + step definitions — BDD tests for JSON-RPC routing, error codes, and Agent Card
  • robot/a2a_jsonrpc.robot + helper — Integration tests for wire format compliance

Quality Checks

  • nox -e typecheck — 0 Pyright errors
  • nox -e lint — all checks passed
  • nox -e format — all files unchanged
## Summary Implements the A2A JSON-RPC 2.0 wire format and method routing layer per ADR-047 and the specification (§Architecture > A2A Integration Architecture), replacing the custom ACP envelope types with standard JSON-RPC 2.0 via the A2A SDK. Closes #690 ## Changes ### New modules in `src/cleveragents/a2a/` - **`jsonrpc_models.py`** — Pydantic models for JSON-RPC 2.0 request/response/error envelopes, batch support, and A2A-specific method parameters - **`jsonrpc_router.py`** — Method routing dispatcher supporting standard A2A methods (`message/send`, `message/stream`, `tasks/get`, `tasks/cancel`) and `_cleveragents/` extension methods (plan/*, registry/*, context/*, sync/*, namespace/*, health) - **`jsonrpc_handlers.py`** — Handler implementations for each routed method, delegating to existing application services - **`jsonrpc_errors.py`** — Error taxonomy mapping domain exceptions to JSON-RPC error codes (-32600 through -32099 for A2A-specific errors) - **`agent_card.py`** — Agent Card generation for `/.well-known/agent.json` endpoint, declaring capabilities, supported interfaces, auth schemes, and `_cleveragents/` extensions ### Test files - `features/a2a_jsonrpc.feature` + step definitions — BDD tests for JSON-RPC routing, error codes, and Agent Card - `robot/a2a_jsonrpc.robot` + helper — Integration tests for wire format compliance ## Quality Checks - `nox -e typecheck` — 0 Pyright errors - `nox -e lint` — all checks passed - `nox -e format` — all files unchanged
refactor(a2a): rename ACP module and symbols to A2A standard
All checks were successful
CI / benchmark-publish (pull_request) Has been skipped
Details
CI / lint (pull_request) Successful in 20s
Details
CI / build (pull_request) Successful in 16s
Details
CI / quality (pull_request) Successful in 35s
Details
CI / security (pull_request) Successful in 47s
Details
CI / typecheck (pull_request) Successful in 1m37s
Details
CI / integration_tests (pull_request) Successful in 3m38s
Details
CI / unit_tests (pull_request) Successful in 4m44s
Details
CI / docker (pull_request) Successful in 1m6s
Details
CI / coverage (pull_request) Successful in 5m30s
Details
CI / benchmark-regression (pull_request) Successful in 35m37s
Details
2fe95d1b38 
Renamed src/cleveragents/acp/ to src/cleveragents/a2a/ and all 13
Acp* classes to A2a* per ADR-047 (A2A Standard Adoption). Updated
all imports, structlog event names (acp.* → a2a.*), field names
(acp_version → a2a_version), and test references across the entire
codebase. This is a cosmetic rename only — no behavioral changes.

ISSUES CLOSED: #688
feat(a2a): implement JSON-RPC 2.0 wire format and method routing
All checks were successful
CI / benchmark-publish (pull_request) Has been skipped
Details
CI / lint (pull_request) Successful in 14s
Details
CI / build (pull_request) Successful in 16s
Details
CI / quality (pull_request) Successful in 18s
Details
CI / security (pull_request) Successful in 35s
Details
CI / typecheck (pull_request) Successful in 55s
Details
CI / unit_tests (pull_request) Successful in 2m57s
Details
CI / integration_tests (pull_request) Successful in 3m23s
Details
CI / docker (pull_request) Successful in 41s
Details
CI / coverage (pull_request) Successful in 5m36s
Details
CI / benchmark-regression (pull_request) Successful in 35m11s
Details
33900eab03 
Implement the JSON-RPC 2.0 wire format layer and method routing for the
A2A protocol, building on the ACP-to-A2A rename from #688.

New modules in src/cleveragents/a2a/:
- jsonrpc_models.py: Pydantic v2 models for JSON-RPC 2.0 request,
  response, error, and notification envelopes
- jsonrpc_router.py: Method router that dispatches JSON-RPC requests
  to registered handlers, with support for standard A2A methods and
  _cleveragents/ extension methods
- jsonrpc_handlers.py: Handlers for standard A2A methods (message/send,
  message/stream, tasks/get, tasks/cancel) and extension method factory
  that delegates to A2aLocalFacade
- jsonrpc_errors.py: Maps domain error taxonomy to JSON-RPC 2.0 error
  codes (standard -32700 to -32603, application -32001 to -32008)
- agent_card.py: Agent Card model and generation for the
  /.well-known/agent.json capability advertisement endpoint

Standard A2A methods:
- message/send: Create/update tasks via messages
- message/stream: Streaming variant with SSE event indicators
- tasks/get: Retrieve task by ID
- tasks/cancel: Cancel running tasks

CleverAgents extension methods (_cleveragents/ prefix):
- plan/use, execute, status, diff, apply, cancel
- registry/list_tools, list_resources
- context/show
- sync/status
- namespace/list
- health

Tests:
- Behave BDD: features/a2a_jsonrpc.feature (28 scenarios)
- Robot Framework: robot/a2a_jsonrpc.robot (9 integration tests)

ISSUES CLOSED: #690
freemo added this to the v3.8.0 milestone 2026-03-12 01:01:11 +00:00
freemo self-assigned this 2026-03-12 20:33:28 +00:00
freemo commented 2026-03-12 20:49:20 +00:00
Author
Owner
Copy link

PM Status — Day 32

State: CONFLICTED — needs rebase onto master.

Priority: Low — M9 (v3.8.0) has no deadline and current focus should remain on M3-M6. This is exploratory/ahead-of-schedule work.

Dependency chain: This PR (#708, JSON-RPC wire format) is the foundation. #713 (stdio) and #720 (HTTP) depend on it. #722 (LangGraph Platform) depends on both transports.

Recommended merge order: #708 → #713 → #720 → #722

Missing labels: Adding Priority/Low, MoSCoW/Could have, Points/13, State/In Progress.

Note on file overlap: #713 and #720 both create transport_protocol.py and transport_selector.py independently. This will need reconciliation during merge — #713 should merge first, then #720 rebases onto it.

@freemo — No rush on the rebase. Focus on merging the 3 approved PRs first (#723, #681, #725), then the mock removal #699/#701 pipeline. These M9 PRs can wait.

### PM Status — Day 32 **State:** CONFLICTED — needs rebase onto master. **Priority:** Low — M9 (v3.8.0) has no deadline and current focus should remain on M3-M6. This is exploratory/ahead-of-schedule work. **Dependency chain:** This PR (#708, JSON-RPC wire format) is the foundation. #713 (stdio) and #720 (HTTP) depend on it. #722 (LangGraph Platform) depends on both transports. **Recommended merge order:** #708 → #713 → #720 → #722 **Missing labels:** Adding Priority/Low, MoSCoW/Could have, Points/13, State/In Progress. **Note on file overlap:** #713 and #720 both create `transport_protocol.py` and `transport_selector.py` independently. This will need reconciliation during merge — #713 should merge first, then #720 rebases onto it. @freemo — No rush on the rebase. Focus on merging the 3 approved PRs first (#723, #681, #725), then the mock removal #699/#701 pipeline. These M9 PRs can wait.
freemo commented 2026-03-13 22:06:03 +00:00
Author
Owner
Copy link

Rebase Required

@freemo — This PR has merge conflicts with master. Please rebase onto the latest master and force-push. See also: #668, #669, #703, #713, #720, #722 (all need rebase).

## Rebase Required @freemo — This PR has merge conflicts with `master`. Please rebase onto the latest `master` and force-push. See also: #668, #669, #703, #713, #720, #722 (all need rebase).
freemo commented 2026-03-14 04:45:06 +00:00
Author
Owner
Copy link

PM Review — Day 34

Status: NOT mergeable (conflicts), 0 reviews, M9 (v3.8.0), Priority/Low, Points/13
Author: @freemo

A2A JSON-RPC 2.0 wire format and method routing. M9 is furthest-out milestone — lowest urgency.

[BLOCKING] Merge conflicts. No action needed until M9 sprint.

Action Items

Who Action Deadline
@freemo Rebase when M9 sprint begins M9 sprint
## PM Review — Day 34 **Status**: NOT mergeable (conflicts), 0 reviews, M9 (v3.8.0), Priority/Low, Points/13 **Author**: @freemo A2A JSON-RPC 2.0 wire format and method routing. M9 is furthest-out milestone — lowest urgency. **[BLOCKING] Merge conflicts.** No action needed until M9 sprint. ### Action Items | Who | Action | Deadline | |-----|--------|----------| | @freemo | Rebase when M9 sprint begins | M9 sprint |
freemo reviewed 2026-03-16 16:27:07 +00:00
freemo left a comment
Copy link

PM Day 36: JSON-RPC 2.0 wire format and method routing. M9 scope (deferred). @freemo author.

PM Day 36: JSON-RPC 2.0 wire format and method routing. M9 scope (deferred). @freemo author.
freemo commented 2026-03-16 22:34:31 +00:00
Author
Owner
Copy link

This feature is for a later version, so closing it and will do it at the appropriate time.

This feature is for a later version, so closing it and will do it at the appropriate time.
freemo closed this pull request 2026-03-16 22:34:31 +00:00
All checks were successful
CI / benchmark-publish (pull_request) Has been skipped
Details
CI / lint (pull_request) Successful in 14s
Required
Details
CI / build (pull_request) Successful in 16s
Required
Details
CI / quality (pull_request) Successful in 18s
Required
Details
CI / security (pull_request) Successful in 35s
Required
Details
CI / typecheck (pull_request) Successful in 55s
Required
Details
CI / unit_tests (pull_request) Successful in 2m57s
Required
Details
CI / integration_tests (pull_request) Successful in 3m23s
Required
Details
CI / docker (pull_request) Successful in 41s
Required
Details
CI / coverage (pull_request) Successful in 5m36s
Required
Details
CI / benchmark-regression (pull_request) Successful in 35m11s
Details

Pull request closed

Please reopen this pull request to perform a merge.
Sign in to join this conversation.
Reviewers
No reviewers
Labels
Clear labels   
auto/needs-reevaluation
Controller deferred this PR; awaiting Phase 6+ scope-evaluator or operator re-enablement.

  
controller-managed
Auto-agents controller manages this PR/issue (see tools/controller/deploy/RUNBOOK.md). Remove this label to abandon controller management.

  
auto/blocked-by-deps
PR blocked by an open issue dependency. Operator must close the dep (or remove the dependency link) before the merge driver can act. Auto-cleared by merge_drive when no open deps remain.

  
auto/ci-timeout
Most recent merge cycle hit CI timeout. Driver excludes this PR while last merge_cycle row is < 30 min old; label persists thereafter as visible history.

  
auto/claimed-implementer
Currently being processed by an implementer worker.

  
auto/claimed-merge
Currently being processed by the merge driver.

  
auto/claimed-reviewer
Currently being processed by a reviewer worker.

  
auto/driver-down
Merge driver heartbeat stale; pipeline halted. Closed automatically on next clean tick.

  
auto/invariant-violation
Detected master commit violating the strict merge invariant. Tracked as an issue (not a PR label); kept here for label completeness.

  
auto/last-attempt-tier-0
In-cycle escalation: most recent attempt ran at the Tier 0 slot (`tier-0`). Slot's model defined in .opencode/models/tiers.yaml.

  
auto/last-attempt-tier-1
In-cycle escalation: most recent attempt ran at the Tier 1 slot (`tier-1`). Slot's model defined in .opencode/models/tiers.yaml.

  
auto/last-attempt-tier-2
In-cycle escalation: most recent attempt ran at the Tier 2 slot (`tier-2`). Slot's model defined in .opencode/models/tiers.yaml. Gated behind IMPLEMENTER_ESCALATION_TIER2_ENABLED.

  
auto/last-attempt-tier-min
In-cycle escalation: most recent attempt ran at the Tier -1 slot (`tier-min`). Slot's model defined in .opencode/models/tiers.yaml. Suffix is ``-min`` (not ``--1``) so the Forgejo UI reads naturally.

  
Automation Tracking
Tracking issues used by the AI Automation system for agents to communicate and report.

  
auto/needs-conflict-resolution
Rebase conflict needs LLM conflict-resolver.

  
auto/needs-implementer
Failing CI needs implementer attention.

  
auto/postmortem
Documenting a driver incident or rollback.

  
auto/ready-to-merge
Reviewer has APPROVED this PR and no later REQUEST_CHANGES is outstanding. The merge driver requires this label to even consider a PR for merging. Set by the reviewer worker on APPROVE; cleared on REQUEST_CHANGES.

  
auto/restart-throttled
Train repeatedly lost master-tempo races. Driver excludes via merge_cycle until cooldown elapses; label persists as visible history.

  
auto/revert
Revert PR backing out an invariant violation. Fast-tracked through the merge driver.

  
auto/sentinel
Sentinel PR duplicated from upstream into a personal fork by tools/duplicate_prs_to_fork.py for pipeline testing. Lives only in the fork; the canonical pipeline never sees it.

  
auto/stale-inactivity
No implementer activity for N days. Flagged for human review. Auto-cleared on next push to head branch.

  
auto/unstable
Repeatedly fails on current master (>= 3 ci-fail-on-rebased-sha releases in 12 h). Excluded from driver until human triage.

  
Blocked
A ticket in a blocked state and unable to complete until some other task is completed first.

  
Bounty
$100
 A bounty of $100 for any open-source contributor who provides a MR that solves this issue

  
Bounty
$1000
 A bounty of $1000 for any open-source contributor who provides a MR that solves this issue

  
Bounty
$10000
 A bounty of $10000 for any open-source contributor who provides a MR that solves this issue

  
Bounty
$20
 A bounty of $20 for any open-source contributor who provides a MR that solves this issue

  
Bounty
$2000
 A bounty of $2000 for any open-source contributor who provides a MR that solves this issue

  
Bounty
$250
 A bounty of $250 for any open-source contributor who provides a MR that solves this issue

  
Bounty
$50
 A bounty of $50 for any open-source contributor who provides a MR that solves this issue

  
Bounty
$500
 A bounty of $500 for any open-source contributor who provides a MR that solves this issue

  
Bounty
$5000
 A bounty of $5000 for any open-source contributor who provides a MR that solves this issue

  
Bounty
$750
 A bounty of $750 for any open-source contributor who provides a MR that solves this issue

  
MoSCoW
Could have
 Could have feature in order to satisfy the epic/legendary.

  
MoSCoW
Must have
 Must have feature in order to satisfy the epic/legendary.

  
MoSCoW
Should have
 Should have feature in order to satisfy the epic/legendary.

  
Needs Feedback
There are questions in the ticket that can not be completed until the project owner provides clarity.

  
Points
1
 1 man-hours worth of work for an expert with no learning curve.

  
Points
13
 13 man-hours worth of work for an expert with no learning curve.

  
Points
2
 2 man-hours worth of work for an expert with no learning curve.

  
Points
21
 21 man-hours worth of work for an expert with no learning curve.

  
Points
3
 3 man-hours worth of work for an expert with no learning curve.

  
Points
34
 34 man-hours worth of work for an expert with no learning curve.

  
Points
5
 5 man-hours worth of work for an expert with no learning curve.

  
Points
55
 55 man-hours worth of work for an expert with no learning curve.

  
Points
8
 8 man-hours worth of work for an expert with no learning curve.

  
Points
88
 88 man-hours worth of work for an expert with no learning curve.

  
Priority
Backlog
 This ticket has backlogged priority and is not to be worked on yet

  
Priority
CI Blocker
 Critical priority issue that blocks CI/CD pipeline and prevents PR merges

  
Priority
Critical
 The priority is critical

  
Priority
High
 The priority is high

  
Priority
Low
 The priority is low

  
Priority
Medium
 The priority is medium

  
Signed-off: Owner
When an epic or legendary is in review it must be signed off by owner, tech lead, and scrum master before being marked as completed.

  
Signed-off: Scrum Master
When an epic or legendary is in review it must be signed off by owner, tech lead, and scrum master before being marked as completed.

  
Signed-off: Tech Lead
When an epic or legendary is in review it must be signed off by owner, tech lead, and scrum master before being marked as completed.

  
Spike
A ticket for learning a tool or technology that is needed to be able to do future planning and design.

  
State
Completed
 The ticket has been fully implemented, completed, and merged with the source code. This label should only be applied once a ticket is closed.

  
State
Duplicate
 A ticket that represents the same content as an existing ticket.

  
State
In Progress
 A ticket that is actively being developed.

  
State
In Review
 A ticket that has had some code completed to implement but is waiting to pass peer review and is not yet merged in.

  
State
Paused
 This ticket's work started but wasn't finished. It's on hold (likely in a feature branch) and will be resumed later, either due to a blocker or a delay.

  
State
Unverified
 All new tickets start in this state. A developer may set it to show the ticket is unverified. This means we haven't agreed to work on it. It will either move to a verified state or be closed as wontdo.

  
State
Verified
 The issue has been verified by a developer as legitimate. It will be worked on and verified tickets are now considered part of the backlog.

  
State
Wont Do
 This ticket has been decided it wont be done. This may mean the bug has been determined to not be real (cant verify) or the feature is one we have decided we dont want to adopt.

  
Type
Automation
 Any edits or discussion about the AI automated coding system.

  
Type
Bug
 Something that doesnt work as intended.

  
Type
Discussion
 Anytime a ticket represents a discussion about a subject and doesnt fall into one of the other categories.

  
Type
Documentation
 An error or improvement needed in the documentation.

  
Type
Epic
 Any first tier epic. That is, an epic which contains only issues as children and will not have sub-epics.

  
Type
Feature
 Some new functionality not present.

  
Type
Legendary
 A type of Epic which will contain other Epics.

  
Type
Refactor
 A code change that restructures existing code without changing its external behavior.

  
Type
Support
 Someone needs help using the project.

  
Type
Task
 A generic task that doesnt fit into the other type categories.

  
Type
Testing
 Work exclusively focusing on fixing or expanding testing.

No labels
auto/needs-reevaluation
controller-managed
auto/blocked-by-deps
auto/ci-timeout
auto/claimed-implementer
auto/claimed-merge
auto/claimed-reviewer
auto/driver-down
auto/invariant-violation
auto/last-attempt-tier-0
auto/last-attempt-tier-1
auto/last-attempt-tier-2
auto/last-attempt-tier-min
Automation Tracking
auto/needs-conflict-resolution
auto/needs-implementer
auto/postmortem
auto/ready-to-merge
auto/restart-throttled
auto/revert
auto/sentinel
auto/stale-inactivity
auto/unstable
Blocked
Bounty
$100
Bounty
$1000
Bounty
$10000
Bounty
$20
Bounty
$2000
Bounty
$250
Bounty
$50
Bounty
$500
Bounty
$5000
Bounty
$750
MoSCoW
Could have
MoSCoW
Must have
MoSCoW
Should have
Needs Feedback
Points
1
Points
13
Points
2
Points
21
Points
3
Points
34
Points
5
Points
55
Points
8
Points
88
Priority
Backlog
Priority
CI Blocker
Priority
Critical
Priority
High
Priority
Low
Priority
Medium
Signed-off: Owner
Signed-off: Scrum Master
Signed-off: Tech Lead
Spike
State
Completed
State
Duplicate
State
In Progress
State
In Review
State
Paused
State
Unverified
State
Verified
State
Wont Do
Type
Automation
Type
Bug
Type
Discussion
Type
Documentation
Type
Epic
Type
Feature
Type
Legendary
Type
Refactor
Type
Support
Type
Task
Type
Testing
Milestone
Clear milestone
No items
No milestone
v3.8.0
Projects
Clear projects
No items
No project
Assignees
Clear assignees
No assignees
freemo
1 participant
Notifications
Due date
The due date is invalid or out of range. Please use the format "yyyy-mm-dd".

No due date set.

Blocks
#690 feat(a2a): Implement JSON-RPC 2.0 wire format and method routing
cleveragents/cleveragents-core
Reference
cleveragents/cleveragents-core!708
No description provided.