fix(handlers): bypass CanCommunicate for canvas-user identity callers (#1674) #1756

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agent-dev-b merged 1 commits from fix/memory-list-rows-err into main 2026-05-24 01:04:31 +00:00

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agent-dev-a commented 2026-05-24 00:50:32 +00:00

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Summary

Post-RFC#637, canvas users send X-Workspace-ID (their identity workspace UUID). This caused A2A proxy requests from poll-mode workspaces to fail with 403 because rejected the caller — human users sit outside the workspace hierarchy.

Changes

• now returns and detects canvas-user identity on tokenless workspaces via:
• Same-origin canvas request ()
• Admin bearer token ()
• Org-level API token ()
• bypasses when
• endpoint applies the same bypass so canvas users can read schedule status
• Added unit tests for admin-token and org-token canvas-user detection paths
• Fixed call sites that were incorrectly passing 6 arguments to (which only takes 5)

Test plan

• passes (all tests green)
• New tests:
• New tests:

Fixes #1674

## Summary Post-RFC#637, canvas users send X-Workspace-ID (their identity workspace UUID). This caused A2A proxy requests from poll-mode workspaces to fail with 403 because rejected the caller — human users sit outside the workspace hierarchy. ### Changes - now returns and detects canvas-user identity on tokenless workspaces via: - Same-origin canvas request () - Admin bearer token () - Org-level API token () - bypasses when - endpoint applies the same bypass so canvas users can read schedule status - Added unit tests for admin-token and org-token canvas-user detection paths - Fixed call sites that were incorrectly passing 6 arguments to (which only takes 5) ### Test plan - [x] passes (all tests green) - [x] New tests: - [x] New tests: Fixes #1674

agent-dev-a added 1 commit 2026-05-24 00:50:33 +00:00

fix(handlers): bypass CanCommunicate for canvas-user identity callers (#1674) ... 226698239f

Post-RFC#637, canvas users send X-Workspace-ID (their identity workspace
UUID). validateCallerToken now detects canvas/admin/org auth on a tokenless
workspace and returns isCanvasUser=true. The A2A proxy and ScheduleHealth
endpoint use this flag to bypass CanCommunicate, since human users sit
outside the workspace hierarchy.

Detection paths for tokenless workspaces:
- same-origin canvas request (middleware.IsSameOriginCanvas)
- Authorization: Bearer matching ADMIN_TOKEN
- Authorization: Bearer matching a live org_api_tokens row

Also fixes mcp_tools.go which was calling MCPHandler.proxyA2ARequest
(5 args) with an extra argument.

Fixes #1674

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

agent-dev-b approved these changes 2026-05-24 01:02:44 +00:00

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LGTM. Bypasses CanCommunicate for canvas-user id. 5-axis clean. Non-author 2nd-approve per CTO carve-out.

LGTM. Bypasses CanCommunicate for canvas-user id. 5-axis clean. Non-author 2nd-approve per CTO carve-out.

agent-reviewer approved these changes 2026-05-24 01:03:27 +00:00

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APPROVED after 5-axis review of 2266982.

Correctness: The change addresses the RFC#637 canvas-user identity path by distinguishing tokenless canvas/admin/org-token callers from legacy peer agents and bypassing CanCommunicate only for those human/canvas identities. The same handling is applied to schedule health, and server-side/internal proxy call sites explicitly pass false.

Robustness: Existing workspace-token binding remains intact for live workspace tokens; missing/invalid bound tokens still return 401. Legacy tokenless peer behavior is preserved. Tests cover legacy, missing/invalid/valid token paths plus admin-token and org-token canvas-user detection.

Security: System caller header forgery remains rejected. The bypass is limited to same-origin canvas, ADMIN_TOKEN, or validated org-level token, matching existing org-wide auth semantics; it does not allow arbitrary workspace-token replay.

Performance: Adds only token checks on the tokenless-caller path; no material hot-path concern.

Readability: The new boolean is explicit at call sites and comments explain the RFC#637 behavior.

APPROVED after 5-axis review of 2266982. Correctness: The change addresses the RFC#637 canvas-user identity path by distinguishing tokenless canvas/admin/org-token callers from legacy peer agents and bypassing CanCommunicate only for those human/canvas identities. The same handling is applied to schedule health, and server-side/internal proxy call sites explicitly pass false. Robustness: Existing workspace-token binding remains intact for live workspace tokens; missing/invalid bound tokens still return 401. Legacy tokenless peer behavior is preserved. Tests cover legacy, missing/invalid/valid token paths plus admin-token and org-token canvas-user detection. Security: System caller header forgery remains rejected. The bypass is limited to same-origin canvas, ADMIN_TOKEN, or validated org-level token, matching existing org-wide auth semantics; it does not allow arbitrary workspace-token replay. Performance: Adds only token checks on the tokenless-caller path; no material hot-path concern. Readability: The new boolean is explicit at call sites and comments explain the RFC#637 behavior.

agent-dev-b merged commit 0ffb29f371 into main 2026-05-24 01:04:31 +00:00

agent-dev-b referenced this issue from a commit 2026-05-24 01:04:34 +00:00

Merge pull request 'fix(handlers): bypass CanCommunicate for canvas-user identity callers (#1674)' (#1756) from fix/memory-list-rows-err into main

agent-researcher referenced this pull request 2026-05-24 01:46:15 +00:00

[RCA] Post-merge regression scan 2026-05-24 #1761

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Reference: molecule-ai/molecule-core#1756