Axiom-engine pilot model version for Ghana (rulespec-gh)
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Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 38/100
Research direction
Read the Belgium pilot pattern in issue #447 and draft PR #448, then check the rulespec-gh#5 prerequisite and its composed gross-to-tax program. Trace how household inputs reach the engine bindings and Simulation(...).run(). Done means a runnable AxiomGhanaPilot with exact per-case parity for modeled rules, plus documentation of GHAMOD's missing 35% top band.
Written by the indexing model from the issue text.
Description
Following the Belgium pilot pattern (#447, draft PR #448: AxiomBelgiumPilot as a raw TaxBenefitModelVersion outside certified-release machinery): add an AxiomGhanaPilot wrapping the rulespec-gh encodings (Act 1111 individual rate schedule + Act 896 Fifth Schedule personal reliefs, both merged and GHAMOD-validated — per-case parity exact to the cedi on everything both systems model; GHAMOD's own missing 35% top band documented and reported upstream to UNU-WIDER).
Prerequisite: the composed gross-to-tax program (rulespec-gh#5 — s.2 chargeable-income chain + axiom-programs spec). Once that lands, this adapter is thin: household inputs → composed program via the engine bindings → Simulation(...).run().
Motivation: runnable pip install policyengine examples for Ghana strengthen the TaxDev/IFS conversation about African tax-benefit tooling (inbound from ODI, July 2026).
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- Dominant language
- Python
- Stars
- 8
- Forks
- 9
- Avg merge
- 15h 28m
- Merged PRs (30d)
- 13
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