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PACT governance (Rust) — D/T/R addressing, clearance, envelopes, 5-step access, 4-zone gradient.
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| name | pact |
| description | PACT governance (Rust) — D/T/R addressing, clearance, envelopes, 5-step access, 4-zone gradient. |
Principled Architecture for Constrained Trust (PACT) -- organizational governance for AI agents. D/T/R addressing, knowledge clearance, operating envelopes, access enforcement, and verification gradient.
Python module: kailash.pact (backed by Rust implementation, source-available BSL 1.1)
Depends on: kailash.governance + kailash.eatp (governance engine and EATP protocol)
Tests: 1,396+ (governance 565 + eatp 58 + pact 58 + Python 109 + bridge enforcement 10)
PyO3: from kailash import PactGovernanceEngine, PactAddress, PactDimensionName, PactVacancyDesignation, PactBridgeApprovalStatus
mcp feature), 6-step evaluation, NaN protection| # | Flow | Entry Point | Key Invariant |
|---|---|---|---|
| 1 | Compile org | GovernanceEngine::new(org_def) | Grammar: D/T must be followed by R |
| 2 | Access check | engine.check_access(role_id, item, posture) | 5-step fail-closed algorithm |
| 3 | Posture ceiling | Implicit in step 2 | effective = min(clearance, posture_ceiling) |
| 4 | Action verification | engine.verify_action(addr, action, ctx) | 4-zone gradient, worst-zone wins |
| 5 | NEVER_DELEGATED | Implicit in flow 4 | 7 actions always HELD |
| 6 | Bridge access | Step 3e in flow 2 | Bilateral vs unilateral directionality |
| 7 | Bridge approval | engine.request_bridge() / approve_bridge() | LCA approver, Pending->Approved gate |
| 8 | Frozen context | engine.get_context(addr, posture) | No &mut self, no Deserialize |
| 9 | Python integration | from kailash import PactGovernanceEngine | 25+ types, thread-safe |
| 10 | Role discovery | engine.list_roles() / get_node_by_role_id() | All roles (not just heads), v3.4.1 |
| 11 | Address resolution | engine.resolve_role_id("D1-R1") | Resolves D/T/R address OR config ID, v3.4.1 |
| 12 | Vacancy designation | engine.set_vacancy_designation() | Acting occupant, 24h expiry, fail-closed |
| 13 | Auto-suspension | RoleConfig::auto_suspend_on_vacancy | BFS cascade, opt-in per-role |
| 14 | LCA computation | Address::lowest_common_ancestor(a, b) | O(depth), grammar-validated |
| 15 | Dimension scoping | DelegationRecord::dimension_scope | BTreeSet, subset tightening |
| 16 | Nested departments | DepartmentConfig::departments (v3.6.1) | Recursive D-R-D-R, compile_department() recurses |
See the PACT governance flows documentation for detailed storyboards.
| Zone | allowed() | When |
|---|---|---|
| AutoApproved | true | Action within all limits |
| Flagged | true | Action >= 80% of a limit |
| Held | false | NEVER_DELEGATED action or unknown action |
| Blocked | false | Action exceeds hard limit |
Worst zone across all 5 dimensions wins.
| Backend | Feature | Use Case |
|---|---|---|
MemoryEnvelopeStore etc. | default | In-process, bounded (10K FIFO), tests |
SqlitePactStore | sqlite | Persistent, auto-migration, file or in-memory |
evaluate_financial: checks is_finite() for transaction_amount AND daily_totalKailash Rust security — input validation, secrets, injection prevention. Hardcoded secrets BLOCKED.
Kailash Rust security — input validation, secrets, injection prevention. Hardcoded secrets BLOCKED.
Claude Code architecture — artifact design, context, agentic patterns. For CC audit/build.
Kailash Rust validation — parameter, DataFlow, connection, workflow, security. Use for code review.
Kailash Nexus (Rust) — MANDATORY for API+CLI+MCP unified deployment. Direct axum/tonic BLOCKED.
Project Skills (rs variant): cross-cutting patterns spanning Rust crates and PyO3/Magnus/napi-rs bindings. See enterprise-infra-bindings.md, l3-binding-parity.md, and ffi-handle-lifecycle.md.