feat: add hdp-crewai Python middleware package#5
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asiridalugoda merged 1 commit intomainfrom Mar 27, 2026
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Introduces packages/hdp-crewai — a non-blocking CrewAI integration
that attaches HDP delegation provenance to any crew with zero changes
to core CrewAI logic.
Hooks into CrewAI's existing callback system (before_kickoff_callbacks,
step_callback, task_callback, after_kickoff_callbacks) and implements
all five design considerations:
1. Scope enforcement — step_callback inspects AgentAction.tool against
authorized_tools; strict mode raises HDPScopeViolationError, default
mode logs and records the violation in the token audit trail.
2. Delegation depth limits — max_hops enforced per crew execution;
hops beyond the limit are skipped and warned.
3. Token size / performance — Ed25519 = 64 bytes/hop; all HDP
operations are non-blocking (failures log, never raise).
4. Verification utilities — verify_chain() validates the complete
delegation chain offline using only the human's Ed25519 public key.
5. Memory integration — after_kickoff persists the signed token JSON
to CrewAI's storage directory alongside task outputs.
26 tests, all passing.
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Summary
Adds
packages/hdp-crewai— a Python middleware package that attaches HDP delegation provenance to any CrewAI crew with zero changes to CrewAI core.What's included
Five design considerations
step_callbackchecksAgentAction.toolagainstauthorized_tools;strict=TrueraisesHDPScopeViolationError, default logs + records in tokenmax_hopsenforced intask_callback; hops beyond limit are skippedverify_chain(token, public_key)validates chain offlinedb_storage_path()after kickoffRelated