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Regulatory Diff
ASecurityCompare Indonesian statutory and platform ruleset transitions across effective date windows (e.g. PP 55/2022 vs PP 20/2026 or BPJS 2025 vs 2026).
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- Added October 7, 2026
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[](https://www.skillsdirectory.com/skills/adamriofc-regulatory-diff)---
name: regulatory-diff
description: "Compare Indonesian statutory and platform ruleset transitions across effective date windows (e.g. PP 55/2022 vs PP 20/2026 or BPJS 2025 vs 2026)."
argument-hint: <domain_umkm_bpjs_pph21_marketplace> <old_ruleset_id> <new_ruleset_id>
risk_level: MEDIUM
rule_type: statutory
quality_tier: tested
allowed-tools: bash
capability:
purpose: [tax_calculation, statutory_compliance]
not_for: [tax_legal_opinion, autonomous_filing]
requires: [<domain_umkm_bpjs_pph21_marketplace> <old_ruleset_id> <new_ruleset_id>]
produces: [taxAmount, effectiveRatePercent, statutoryReference, safeToUse]
consumes: [hr.payroll_cost, context.asOfDate]
deterministic: true
cross_domain_relevance:
hr: high
finance: high
legal: medium
---
# Regulatory & Ruleset Diff Engine
Compares versioned Single-Source-of-Truth (SSOT) rulesets across temporal transition windows to generate auditable diffs.
## Supported Domains & Ruleset Transition History
* **`umkm`**: Compare `UMKM-2022` (PP 55/2022) ➔ `UMKM-2026` (PP 20/2026, effective 2026-04-22).
* **`bpjs`**: Compare `BPJS-2025` ➔ `BPJS-2026` (effective 2026-03-01 wage cap changes).
* **`pph21`**: Compare `PPH21-2024` TER tables & Article 17 brackets.
* **`marketplace`**: Compare platform fee policy versions (`MKPL-FEE-2024`).
## Hybrid Execution Model
Pass parameters to `engines/regulatory-diff.js`:
* `compareRulesets(domain, oldRulesetId, newRulesetId)`
* Returns structured diff including:
- **`effectiveTransitionDate`**: Date the amendment or new regulation took force.
- **`removedEntities` / `addedEntities`**: Eligibility changes (e.g. PT/CV removal under PP 20/2026).
- **`totalChanges`**: Number of modified statutory parameters.
- **`lifecycle_status`**: Status transitions (`ARCHIVED` ➔ `RELEASED` / `SUPERSEDED`).
## Trust Envelope & Provenance
* Outputs link directly to official gazette sources cited in `PROVENANCE.md`.
* Verified against cryptographic ruleset hashes in `engines/rules/integrity.js`.
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